char *ckxv
= "UNIX Communications support, 5A(0102), 23 Nov 92";
/* C-Kermit interrupt, terminal control & i/o functions for UNIX */
Author: Frank da Cruz (fdc@columbia.edu, FDCCU@CUVMA.BITNET),
Columbia University Center for Computing Activities.
First released January 1985.
Copyright (C) 1985, 1992, Trustees of Columbia University in the City of New
York. Permission is granted to any individual or institution to use this
software as long as it is not sold for profit. This copyright notice must be
retained. This software may not be included in commercial products without
written permission of Columbia University.
#include "ckcdeb.h" /* This moved to here. */
#include <errno.h> /* System error numbers */
#include "ckcnet.h" /* Symbols for network types. */
The directory-related includes are here because we need to test some
file-system-related symbols to find out which system we're being compiled
under. For example, MAXNAMLEN is defined in BSD4.2 but not 4.1.
#ifdef SDIRENT /* Directory bits... */
#else /* !NDIR, !XNDIR */
#include "/usr/lib/ndir.h"
#else /* !RTU, !NDIR, !XNDIR */
#else /* !RTU, !NDIR, !XNDIR, !DIRENT, i.e. all others */
/* Definition of HZ, used in msleep() */
#define HZ ( 1000 / CLOCK_TICK )
#define HZ ( 1000 / CLOCK_TICK )
#define nap(x) (void)syscall(3112, (x))
#undef NGROUPS_MAX /* Prevent multiple definition warnings */
#include <signal.h> /* Signals */
/* For setjmp and longjmp */
/* Maximum length for the name of a tty device */
#define DEVNAMLEN 50 /* longer field for host:service */
The following test differentiates between 4.1 BSD and 4.2 & later.
If you have a 4.1BSD system with the DIRENT library, this test could
mistakenly diagnose 4.2BSD and then later enable the use of system calls
that aren't defined. If indeed there are such systems, we can use some
other way of testing for 4.1BSD, or add yet another compile-time switch.
#ifndef FT18 /* Except for Fortune. */
Minix support added by Charles Hedrick,
Rutgers University: hedrick@aramis.rutgers.edu
Minix also has V7 enabled.
#include "ckuver.h" /* Version herald */
/* UUCP lock file name definition */
/* Name of UUCP tty device lock file */
LOCK_DIR is the name of the lockfile directory.
If LOCK_DIR is already defined (e.g. on command line), we don't change it.
PIDSTRING means use ASCII string to represent pid in lockfile.
#define LOCK_DIR "/var/spool/uucp";
#define LOCK_DIR "/var/spool/locks";
#ifdef RTAIX /* IBM RT PC AIX 2.2.1 */
#define LOCK_DIR "/etc/locks";
#define LOCK_DIR "/etc/locks";
#define LOCK_DIR "/etc/locks";
#ifdef M_SYS5 /* wht@n4hgf - SCO */
#define LOCK_DIR "/usr/spool/uucp";
#define LOCK_DIR "/usr/spool/uucp";
#define LOCK_DIR "/var/spool/locks";
#define LOCKF /* Use lockf() too in SVR4 */
#define LOCK_DIR "/var/spool/locks";
#define LOCK_DIR "/usr/spool/locks";
#define LOCK_DIR "/usr/spool/uucp/LCK";
#define LOCK_DIR "/usr/spool/uucp";
#endif /* !LOCK_DIR (outside ifndef) */
/* bits for attmodem: internal modem in use, restart getty */
Variables available to outside world:
dftty -- Pointer to default tty name string, like "/dev/tty".
dfloc -- 0 if dftty is console, 1 if external line.
dfflow -- Default flow control
ckxech -- Flag for who echoes console typein:
1 - The program (system echo is turned off)
0 - The system (or front end, or terminal).
functions that want to do their own echoing should check this flag
flfnam -- Name of lock file, including its path, e.g.,
"/usr/spool/uucp/LCK..cul0" or "/etc/locks/tty77"
lkflfn -- Name of link to lock file, including its paths
haslock -- Flag set if this kermit established a uucp lock.
backgrd -- Flag indicating program executing in background ( & on
end of shell command). Used to ignore INT and QUIT signals.
rtu_bug -- Set by stptrap(). RTU treats ^Z as EOF (but only when we handle
Functions for assigned communication line (either external or console tty):
sysinit() -- System dependent program initialization
syscleanup() -- System dependent program shutdown
ttopen(ttname,local,mdmtyp,timo) -- Open the named tty for exclusive access.
ttclos() -- Close & reset the tty, releasing any access lock.
ttsspd(cps) -- Set the transmission speed of the tty.
ttgspd() -- Get (read) the the transmission speed of the tty.
ttpkt(speed,flow,parity) -- Put the tty in packet mode and set the speed.
ttvt(speed,flow) -- Put the tty in virtual terminal mode.
or in DIALING or CONNECTED modem control state.
ttres() -- Restore original tty modes.
ttscarr(carrier) -- Set carrier control mode, on/off/auto.
ttinl(dest,max,timo) -- Timed read line from the tty.
ttinc(timo) -- Timed read character from tty.
myread() -- Raw mode bulk buffer read, gives subsequent
chars one at a time and simulates FIONREAD.
myunrd(c) -- Places c back in buffer to be read (one only)
ttchk() -- See how many characters in tty input buffer.
ttxin(n,buf) -- Read n characters from tty (untimed).
ttol(string,length) -- Write a string to the tty.
ttoc(c) -- Write a character to the tty.
ttflui() -- Flush tty input buffer.
ttsndb() -- Send BREAK signal.
ttsndlb() -- Send Long BREAK signal.
ttlock(ttname) -- "Lock" tty device against uucp collisions.
ttunlck() -- Unlock tty device.
For ATT7300/Unix PC, System V:
attdial(ttname,speed,telnbr) -- dials ATT7300/Unix PC internal modem
offgetty(ttname) -- Turns off getty(1m) for comms line
ongetty(ttname) -- Restores getty() to comms line
Functions for console terminal:
congm() -- Get console terminal modes.
concb(esc) -- Put the console in single-character wakeup mode with no echo.
conbin(esc) -- Put the console in binary (raw) mode.
conres() -- Restore the console to mode obtained by congm().
conoc(c) -- Unbuffered output, one character to console.
conol(s) -- Unbuffered output, null-terminated string to the console.
conola(s) -- Unbuffered output, array of strings to the console.
conxo(n,s) -- Unbuffered output, n characters to the console.
conchk() -- Check if characters available at console (bsd 4.2).
Check if escape char (^\) typed at console (System III/V).
coninc(timo) -- Timed get a character from the console.
congks(timo) -- Timed get keyboard scan code.
conint() -- Enable terminal interrupts on the console if not background.
connoi() -- Disable terminal interrupts on the console if not background.
msleep(m) -- Millisecond sleep
ztime(&s) -- Return pointer to date/time string
gtimer() -- Get elapsed time since last call to rtimer()
/* Conditional Includes */
/* Whether to include <sys/file.h> */
#ifdef RTU /* RTU doesn't */
#ifdef CIE /* CIE does. */
#ifdef BSD41 /* 4.1 BSD doesn't */
#ifdef is68k /* is68k (whatever that is) */
#ifdef COHERENT /* Coherent */
#ifndef NOFILEH /* Now include if selected. */
#ifdef BSD44ORPOSIX /* POSIX uses termios.h */
#ifndef BSD44 /* Really POSIX */
#define NOSYSIOCTLH /* No ioctl's allowed. */
#undef ultrix /* Turn off any ultrix features. */
/* System III, System V */
#ifdef SVR4 /* Sys V R4 and later */
/* Need this for termiox structure, RTS/CTS and DTR/CD flow control */
#ifdef MINIX /* MINIX uses ioctl's */
#define NOSYSIOCTLH /* but has no <sys/ioctl.h> */
#ifndef NOSYSIOCTLH /* Others use ioctl() */
This is to get rid of cpp warning messages that occur because all of
these symbols are defined by both termios.h and ioctl.h on the SUN.
/* Whether to include <fcntl.h> */
#ifndef is68k /* Only a few don't have this one. */
#ifdef ATT7300 /* Unix PC, internal modem dialer */
#ifdef HPUX /* HP-UX variations. */
#include <sys/modem.h> /* HP-UX modem signals */
#ifdef hp9000s500 /* Model 500 */
#include <sys/bsdtty.h> /* HP-UX Berkeley tty support */
/* BSD, V7, Coherent, Minix, et al. */
#ifdef SVORPOSIX /* Sys V or POSIX */
#ifdef NOIEXTEN /* This is broken on some systems */
#undef IEXTEN /* like Convex/OS 9.1 */
#ifndef IEXTEN /* Turn off ^O/^V processing. */
#define IEXTEN 0 /* Needed, at least, on BSDI. */
#else /* Not AT&T Sys V or POSIX */
#include <sgtty.h> /* So we use <sgtty.h> */
#ifndef PROVX1 /* Now <sys/time.h> ... */
#include <sys/time.h> /* Clock info (for break generation) */
#ifdef OSF /* DEC OSF/1 1.0 */
#ifdef BSD41 /* BSD 4.1 */
#ifdef FT21 /* For:Pro 2.1 */
#ifdef BSD29 /* BSD 2.9 */
#include <sys/timeb.h> /* Clock info for NCR Tower */
#include <sys/timeb.h> /* Clock info for NCR Tower */
#include "/sys/ins/base.ins.c"
#include "/sys/ins/error.ins.c"
#include "/sys/ins/ios.ins.c"
#include "/sys/ins/sio.ins.c"
#include "/sys/ins/pad.ins.c"
#include "/sys/ins/time.ins.c"
#include "/sys/ins/pfm.ins.c"
#include "/sys/ins/pgm.ins.c"
#include "/sys/ins/ec2.ins.c"
#include "/sys/ins/type_uids.ins.c"
#ifdef sxaE50 /* PFU Compact A SX/A TISP V10/L50 */
/* The following #defines are catch-alls for those systems */
/* that didn't have or couldn't find <file.h>... */
#ifdef _POSIX_SOURCE /* This includes MINIX */
Because Xenix <time.h> doesn't declare time() if we're using gcc.
time_t time(); /* All Unixes should have this... */
#endif /* _POSIX_SOURCE */
/* Special stuff for V7 input buffer peeking */
char *initrawq(), *qaddr
[2]={0,0};
/* dftty is the device name of the default device for file transfer */
/* dfloc is 0 if dftty is the user's console terminal, 1 if an external line */
char *dftty
= "/dev/com1.dout"; /* Only example so far of a system */
int dfloc
= 1; /* that goes in local mode by default */
char *dftty
= "/dev/modem";
char *dftty
= CTTNAM
; /* Remote by default, use normal */
int dfloc
= 0; /* controlling terminal name. */
char *dftty
= DFTTY
; /* Default location specified on */
char *dfmdm
= "none"; /* command line. */
int dfloc
= 1; /* controlling terminal name. */
int rtu_bug
= 0; /* set to 1 when returning from SIGTSTP */
int dfprty
= 0; /* Default parity (0 = none) */
int ttprty
= 0; /* The parity that is in use. */
int ttpflg
= 0; /* Parity not sensed yet. */
static int ttpmsk
= 0377; /* Parity stripping mask. */
int ttmdm
= 0; /* Modem in use. */
int ttcarr
= CAR_AUT
; /* Carrier handling mode. */
int dfflow
= FLO_XONX
; /* Default is Xon/Xoff */
int backgrd
= 0; /* Assume in foreground (no '&' ) */
int iniflags
= 0; /* fcntl flags for ttyfd */
int fdflag
= 0; /* Flag for redirected stdio */
int ttfdflg
= 0; /* Open File descriptor was given */
int tvtflg
= 0; /* Flag that ttvt has been called */
long ttspeed
= -1; /* For saving speed */
int ttflow
= -9; /* For saving flow */
int ttld
= -1; /* Line discipline */
static int km_con
= -1; /* Kanji mode for console tty */
static int km_ext
= -1; /* Kanji mode for external device */
extern int ttnproto
; /* Defined in ckcnet.c */
extern int ttnet
; /* Defined in ckcnet.c */
int ckxech
= 0; /* 0 if system normally echoes console characters, else 1 */
/* Declarations of variables global within this module */
static time_t tcount
; /* Elapsed time counter */
static SIGTYP (*saval
)() = NULL
; /* For saving alarm() handler */
BREAKNULS is defined for systems that simulate sending a BREAK signal
by sending a bunch of NUL characters at low speed.
static char /* A string of nulls */
*brnuls
= "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0";
static jmp_buf sjbuf
; /* Longjump buffers */
/* static */ /* (Not static any more) */
int ttyfd
= -1; /* TTY file descriptor */
int telnetfd
= 0; /* File descriptor is for telnet */
int x25fd
= 0; /* File descriptor is for X.25 */
static int lkf
= 0, /* Line lock flag */
cgmf
= 0, /* Flag that console modes saved */ xlocal
= 0, /* Flag for tty local or remote */ curcarr
= 0; /* Carrier mode: require/ignore. */static int netconn
= 0; /* 1 if network connection active */
static char escchr
; /* Escape or attn character */
static struct timeval tv
; /* For getting time, from sys/time.h */
static struct timezone tz
;
static struct timeval tv
; /* For getting time, from sys/time.h */
static struct timezone tz
;
static struct timeval tv
; /* For getting time, from sys/time.h */
static struct timezone tz
;
static struct timeb ftp
; /* And from sys/timeb.h */
static long xclock
; /* For getting time from sys/time.h */
static struct timeb ftp
; /* And from sys/timeb.h */
static long xclock
; /* For getting time from sys/time.h */
static struct timeb ftp
; /* And from sys/timeb.h */
static long xclock
; /* For getting time from sys/time.h */
static struct timeb ftp
; /* And from sys/timeb.h */
static long xclock
; /* For getting time from sys/time.h */
static struct timeb ftp
; /* And from sys/timeb.h */
static long xclock
; /* For getting time from sys/time.h */
static struct timeb ftp
; /* And from sys/timeb.h */
/* sgtty/termio information... */
#ifdef BSD44ORPOSIX /* POSIX or BSD44 */
ttold
, ttraw
, tttvt
, ttcur
, static struct termio ttold
= {0}; /* Init'd for word alignment, */
static struct termio ttraw
= {0}; /* which is important for some */
static struct termio tttvt
= {0}; /* systems, like Zilog... */
static struct termio ttcur
= {0};
static struct termio ccold
= {0};
static struct termio ccraw
= {0};
static struct termio cccbrk
= {0};
static struct sgttyb
/* sgtty info... */
ttold
, ttraw
, tttvt
, ttcur
, /* for communication line */ ccold
, ccraw
, cccbrk
; /* and for console */ static struct sgttyb tchold
, tchnoi
; /* Special chars */
static struct tchars tchold
, tchnoi
;
static struct sgttyb ltchold
, ltchnoi
;
static struct ltchars ltchold
, ltchnoi
;
int lmodef
= 0; /* Local modes */
#endif /* BSD44ORPOSIX */
static struct sgttyb ttbuf
;
/* do we really need this? */
static struct sgttyb vanilla
;
static int attmodem
= 0; /* ATT7300 internal-modem status */
struct updata dialer
= {0}; /* Condition dialer for data call */
char flfnam
[80]; /* uucp lock file path name */
char lkflfn
[80]; /* and possible link to it */
int haslock
= 0; /* =1 if this kermit locked uucp */
static int conesc
= 0; /* set to 1 if esc char (^\) typed */
static char ttnmsv
[DEVNAMLEN
]; /* Copy of open path for tthang */
static status_$t st
; /* error status return value */
static short concrp
= 0; /* true if console is CRP pad */
static char conbuf
[CONBUFSIZ
]; /* console readahead buffer */
static int conbufn
= 0; /* # chars in readahead buffer */
static char *conbufp
; /* next char in readahead buffer */
static uid_$t ttyuid
; /* tty type uid */
static uid_$t conuid
; /* stdout type uid */
* establish acl usage and cleanup handling
* this makes sure that CRP pads
* get restored to a usable mode
main(argc
,argv
) int argc
; char **argv
; {
/* acl usage according to invoking environment */
/* establish a cleanup continuation */
status
= pfm_$
cleanup(dirty
); if (status
.all
!= pfm_$cleanup_set
) {
/* only handle faults for the original process */
if (pid
== getpid() && status
.all
> pgm_$max_severity
) {
/* blew up in main process */
/* restore the console in any case */
/* attempt a clean exit */
debug(F101
, "cleanup fault status", "", status
.all
);
/* doexit(), then send status to continuation */
quo
= pfm_$
cleanup(clean
); if (quo
.all
== pfm_$cleanup_set
)
doexit(pgm_$program_faulted
,-1);
else if (quo
.all
> pgm_$max_severity
)
pfm_$
signal(quo
); /* blew up in doexit() */ /* send to the original continuation */
return(ckcmai(argc
, argv
));
/* ANSI-style prototypes for internal functions. */
/* Functions used outside this module are prototyped in ckcker.h. */
_PROTOTYP( SIGTYP timerh
, () );
_PROTOTYP( SIGTYP cctrap
, () );
_PROTOTYP( SIGTYP esctrp
, () );
_PROTOTYP( SIGTYP sig_ign
, () );
_PROTOTYP( SIGTYP timerh
, (int) );
_PROTOTYP( SIGTYP cctrap
, (int) );
_PROTOTYP( SIGTYP esctrp
, (int) );
_PROTOTYP( int do_open
, (char *) );
_PROTOTYP( int ttrpid
, (char *) );
_PROTOTYP( static int ttlock
, (char *) );
_PROTOTYP( static int ttunlck
, (void) );
_PROTOTYP( int mygetbuf
, (void) );
_PROTOTYP( int myfillbuf
, (void) );
_PROTOTYP( VOID conbgt
, (int) );
_PROTOTYP( VOID acucntrl
, (char *, char *) );
_PROTOTYP( int carrctl
, (struct termios
*, int) );
_PROTOTYP( int carrctl
, (struct termio
*, int) );
_PROTOTYP( int carrctl
, (struct sgttyb
*, int) );
#endif /* BSD44ORPOSIX */
_PROTOTYP( int attdial
, (char *, long, char *) );
_PROTOTYP( int offgetty
, (char *) );
_PROTOTYP( int ongetty
, (char *) );
xxlast(s
,c
) char *s
; char c
;
/* xxlast */ { /* Last occurrence of character c in string s. */
for (i
= (int)strlen(s
); i
> 0; i
--)
if ( s
[i
-1] == c
) return( s
+ (i
- 1) );
/* Timeout handler for communication line input functions */
/* Control-C trap for communication line input functions */
SIGTYP (* occt
)(); /* For saving old SIGINT handler */
cctrap(foo
) int foo
; { /* Needs arg for ANSI C */
cc_int
= 1; /* signal() prototype. *//* S Y S I N I T -- System-dependent program initialization. */
conbgt(0); /* See if we're in the background */
386BSD doesn't allow opening /dev/tty if Kermit is running setuid.
congm(); /* Get console modes */
signal(SIGALRM
,SIG_IGN
); /* Ignore alarms */
gtty(0,&vanilla
); /* Get sgtty info */
iniflags
= fcntl(0,F_GETFL
,0); /* Get flags */ set42sig(); /* Don't ask! (hakanson@cs.orst.edu) */
/* Initialize the setuid package. */
/* Change to the user's real user and group id. */
/* If this can't be done, don't run at all. */
if (x
| 1) fprintf(stderr
,"Fatal: setuid failure.\n");
if (x
| 2) fprintf(stderr
,"Fatal: setgid failure.\n");
if (x
| 4) fprintf(stderr
,"Fatal: C-Kermit setuid to root!\n");
386BSD... OK, now we have changed into ourselves, so can open /dev/tty.
congm(); /* Get console modes */
/* S Y S C L E A N U P -- System-dependent program cleanup. */
stty(0,&vanilla
); /* Get sgtty info */
fcntl(0,F_SETFL
,iniflags
); /* Restore flags */
/* No need to call anything in the suid package here, right? */
/* T T O P E N -- Open a tty for exclusive access. */
ttname: character string - device name or network host name.
If called with lcl < 0, sets value of lcl as follows:
0: the terminal named by ttname is the job's controlling terminal.
1: the terminal named by ttname is not the job's controlling terminal.
But watch out: if a line is already open, or if requested line can't
be opened, then lcl remains (and is returned as) -1.
Less than zero: ttname is a network host name.
Zero or greater: ttname is a terminal device name.
Zero means a local connection (don't use modem signals).
Positive means use modem signals.
nonzero = number of seconds to wait for open() to return before timing out.
-4 if access to device is denied
-3 if access to lock directory denied
-2 upon timeout waiting for device to open
static int ttotmo
= 0; /* Timeout flag */
/* Flag kept here to avoid being clobbered by longjmp. */
ttopen(ttname
,lcl
,modem
,timo
) char *ttname
; int *lcl
, modem
, timo
; {
#define ctermid(x) strcpy(x,"")
extern char *ctermid(); /* Wish they all had this! */
#define ctermid(x) strcpy(x,"")
char *x
; /* what's this ? */
#define NAMEFD /* Feature to allow name to be an open file descriptor */
debug(F101
,"ttopen telnetfd","",telnetfd
);
debug(F111
,"ttopen entry modem",ttname
,modem
);
debug(F101
," ttyfd","",ttyfd
);
debug(F101
," lcl","",*lcl
);
debug(F100
,"ttopen MAXNAMLEN defined","",0);
debug(F100
,"ttopen MAXNAMLEN *NOT* defined","",0);
debug(F100
,"ttopen BSD4 defined","",0);
debug(F100
,"ttopen BSD4 *NOT* defined","",0);
debug(F100
,"ttopen BSD42 defined","",0);
debug(F100
,"ttopen BSD42 *NOT* defined","",0);
debug(F100
,"ttopen MYREAD defined","",0);
debug(F100
,"ttopen MYREAD *NOT* defined","",0);
if (ttyfd
> -1) { /* if device already opened */
if (strncmp(ttname
,ttnmsv
,DEVNAMLEN
)) /* are new & old names equal? */
ttclos(ttyfd
); /* no, close old ttname, open new */
else /* else same, ignore this call, */
return(0); /* and return. */
if (modem
< 0) { /* modem < 0 = special code for net */
modem
= -modem
; /* Positive network type number */ fdflag
= 0; /* Stdio not redirected. */ netconn
= 1; /* And it's a network connection */ debug(F111
,"ttopen net",ttname
,modem
);
for (p
= ttname
; isdigit(*p
); p
++) ; /* Check for all digits */
if (*p
== '\0' && (telnetfd
|| x25fd
)) { /* Avoid X.121 addresses */
ttyfd
= atoi(ttname
); /* Is there a way to test it's open? */ ttfdflg
= 1; /* We got an open file descriptor */ debug(F111
,"ttopen got open network fd",ttname
,ttyfd
);
strncpy(ttnmsv
,ttname
,DEVNAMLEN
); /* Remember the "name". */
x
= 1; /* Return code is "good". */ } else { /* Host name or address given */
x
= netopen(ttname
, lcl
, modem
); /* (see ckcnet.h) */ strncpy(ttnmsv
,ttname
,DEVNAMLEN
);
#ifdef sony_news /* Sony NEWS */
if (ioctl(ttyfd
,TIOCKGET
,&km_ext
) < 0) { /* Get Kanji mode */
perror("ttopen error getting Kanji mode (network)");
debug(F111
,"ttopen error getting Kanji mode","network",0);
km_ext
= -1; /* Make sure this stays undefined. */ xlocal
= *lcl
= 1; /* Network connections are local. */ debug(F101
,"ttopen net x","",x
);
x
= tn_ini(); /* Initialize TELNET protocol */ } else { /* Terminal device */
This code lets you give Kermit an open file descriptor for a serial
communication device, rather than a device name. Kermit assumes that the
line is already open, locked, conditioned with the right parameters, etc.
for (p
= ttname
; isdigit(*p
); p
++) ; /* Check for all digits */
ttyfd
= atoi(ttname
); /* Is there a way to test it's open? */ debug(F111
,"ttopen got open fd",ttname
,ttyfd
);
strncpy(ttnmsv
,ttname
,DEVNAMLEN
); /* Remember the "name". */
xlocal
= *lcl
= 1; /* Assume it's local. */ netconn
= 0; /* Assume it's not a network. */ tvtflg
= 0; /* Might need to initialize modes. */ ttmdm
= modem
; /* Remember modem type. */ fdflag
= 0; /* Stdio not redirected. */ ttfdflg
= 1; /* Flag we were opened this way. */#ifdef sony_news /* Sony NEWS */
/* Get device Kanji mode */
if (ioctl(ttyfd
,TIOCKGET
,&km_ext
) < 0) {
perror("ttopen error getting Kanji mode");
debug(F101
,"ttopen error getting Kanji mode","",0);
km_ext
= -1; /* Make sure this stays undefined. */ return(0); /* Return success */
/* Here we have to open a serial device of the given name. */
occt
= signal(SIGINT
, cctrap
); /* Set Control-C trap, save old one */ tvtflg
= 0; /* Flag for use by ttvt(). */ /* 0 = ttvt not called yet for this device */
fdflag
= (!isatty(0) || !isatty(1)); /* Flag for stdio redirected */ debug(F101
,"ttopen fdflag","",fdflag
);
ttmdm
= modem
; /* Make this available to other fns */ xlocal
= *lcl
; /* Make this available to other fns *//* Code for handling bidirectional tty lines goes here. */
/* Use specified method for turning off logins and suppressing getty. */
/* Should put call to priv_on() here, but that would be very risky! */
acucntrl("disable",ttname
); /* acucntrl() program. */
/* and priv_off() here... */
if ((attmodem
& DOGETY
) == 0) /* offgetty() program. */
attmodem
|= offgetty(ttname
); /* Remember response. */ In the following section, we open the tty device for read/write.
If a modem has been specified via "set modem" prior to "set line"
then the O_NDELAY parameter is used in the open, provided this symbol
is defined (e.g. in fcntl.h), so that the program does not hang waiting
for carrier (which in most cases won't be present because a connection
has not been dialed yet). O_NDELAY is removed later on in ttopen(). It
would make more sense to first determine if the line is local before
doing this, but because ttyname() requires a file descriptor, we have
to open it first. See do_open().
Now open the device using the desired treatment of carrier.
If carrier is REQUIRED, then open could hang forever, so an optional
timer is provided. If carrier is not required, the timer should never
go off, and should do no harm...
ttotmo
= 0; /* Flag no timeout */ saval
= signal(SIGALRM
,timerh
); /* Timed, set up timer. */ xx
= alarm(timo
); /* Timed open() */ debug(F101
,"ttopen alarm","",xx
);
ttotmo
= 1; /* Flag timeout. */ } else ttyfd
= do_open(ttname
);
debug(F111
,"ttopen","modem",modem
);
debug(F101
," ttyfd","",ttyfd
);
debug(F101
," alarm return","",ttotmo
);
} else ttyfd
= do_open(ttname
);
debug(F111
,"ttopen ttyfd",ttname
,ttyfd
);
if (ttyfd
< 0) { /* If couldn't open, fail. */
if (attmodem
& DOGETY
) /* was getty(1m) running before us? */
ongetty(ttnmsv
); /* yes, restart on tty line */
attmodem
&= ~DOGETY
; /* no phone in use, getty restored */ /* Should put call to priv_on() here, but that would be risky! */
acucntrl("enable",ttname
); /* acucntrl() program. */
/* and priv_off() here... */
signal(SIGINT
,occt
); /* Put old Ctrl-C trap back. */
if (errno
== EACCES
) { /* Device is protected against user */
perror(ttname
); /* Print message */
debug(F111
,"ttopen tty access denied",ttname
,errno
);
} else return(ttotmo
? -2 : -1);
/* Make sure it's a real tty. */
fprintf(stderr
,"%s is not a tty!\n",ttname
);
debug(F110
,"ttopen not a tty",ttname
,0);
/* Apollo C runtime claims that console pads are tty devices, which
* is reasonable, but they aren't any good for packet transfer. */
ios_$
inq_type_uid((short)ttyfd
, ttyuid
, st
); if (st
.all
!= status_$ok
) {
fprintf(stderr
, "problem getting tty object type: ");
} else if (ttyuid
!= sio_$uid
) { /* reject non-SIO lines */
close(ttyfd
); ttyfd
= -1;
errno
= ENOTTY
; perror(ttname
); strncpy(ttnmsv
,ttname
,DEVNAMLEN
); /* Keep copy of name locally. */
/* Caller wants us to figure out if line is controlling tty */
if (strcmp(ttname
,CTTNAM
) == 0) { /* "/dev/tty" always remote */
debug(F111
," ttname=CTTNAM",ttname
,xlocal
);
/* If any of 0, 1, or 2 not redirected, we can use ttyname() to get */
/* the name of the controlling terminal... */
Warning: on some UNIX systems (SVR4?), ttyname() reportedly opens /dev but
never closes it. If it is called often enough, we run out of file
descriptors and subsequent open()'s of other devices or files can fail.
} else if ((x0
= isatty(0)) || (x1
= isatty(1)) || isatty(2)) {
x
= ttyname(0); /* and compare it with the */ else if (x1
) /* tty device name. */
strncpy(cname
,x
,DEVNAMLEN
); /* (copy from internal static buf) */
debug(F110
," cname",x
,0);
x
= ttyname(ttyfd
); /* Gat real name of ttname. */ xlocal
= (strncmp(x
,cname
,DEVNAMLEN
) == 0) ? 0 : 1; /* Compare. */ debug(F111
," ttyname",x
,xlocal
);
xlocal
= 1; /* Can't do this test in MINIX */ } else { /* Else, if stdin redirected... */
/* System V provides nice ctermid() function to get name of controlling tty */
ctermid(cname
); /* Get name of controlling terminal */
debug(F110
," ctermid",cname
,0);
x
= ttyname(ttyfd
); /* Compare with name of comm line. */ xlocal
= (strncmp(x
,cname
,DEVNAMLEN
) == 0) ? 0 : 1; debug(F111
," ttyname",x
,xlocal
);
debug(F101
," redirected stdin","",xlocal
);
/* Note, the following code was added so that Unix "idle-line" snoopers */
/* would not think Kermit was idle when it was transferring files, and */
/* maybe log people out. */
if (xlocal
== 0) { /* Remote mode */
if (fdflag
== 0) { /* Standard i/o is not redirected */
debug(F100
,"ttopen setting ttyfd = 0","",0);
close(ttyfd
); /* Use file descriptor 0 */
} else { /* Standard i/o is redirected */
debug(F101
,"ttopen stdio redirected","",ttyfd
);
/* Now check if line is locked -- if so fail, else lock for ourselves */
/* Note: After having done this, don't forget to delete the lock if you */
/* leave ttopen() with an error condition. */
lkf
= 0; /* Check lock */ if ((xx
= ttlock(ttname
)) < 0) { /* Can't lock it. */
debug(F111
,"ttopen ttlock fails",ttname
,xx
);
close(ttyfd
); /* Close the device. */
ttyfd
= -1; /* Erase its file descriptor. */ signal(SIGINT
,occt
); /* Put old SIGINT back. */
if (xx
== -2) { /* If lockfile says tty is in use, */
char *p
= malloc(200); /* print an ls -l listing */
if (p
) { /* if we can get space... */
sprintf(p
,"/bin/ls -l %s",flfnam
);
zsyscmd(p
); /* Get listing. */
free(p
); /* free the space */
xpid
= ttrpid(flfnam
); /* Try to read pid from lockfile */ priv_off(); /* Turn privs back off. */
if (xpid
> -1) printf("pid = %d\n",xpid
); /* show pid */
return(-5); /* Code for device in use */
} else return(-3); /* Access denied */
/* Got the line, now set the desired value for local. */
if (*lcl
!= 0) *lcl
= xlocal
;
/* Some special stuff for v7... */
if (kmem
[TTY
] < 0) { /* If open, then skip this. */
qaddr
[TTY
] = initrawq(ttyfd
); /* Init the queue. */ if ((kmem
[TTY
] = open("/dev/kmem", 0)) < 0) {
fprintf(stderr
, "Can't read /dev/kmem in ttopen.\n");
/* No failure returns after this point */
if (xlocal
&& ioctl(ttyfd
, TIOCSINUSE
, NULL
) < 0) {
fprintf(stderr
, "Can't set in-use flag on modem.\n");
/* Get tty device settings */
#ifdef BSD44ORPOSIX /* POSIX */
debug(F101
,"ttopen tcgetattr ttold.c_lflag","",ttold
.c_lflag
);
#else /* BSD, V7, and all others */
#ifdef ATTSV /* AT&T UNIX */
ioctl(ttyfd
,TCGETA
,&ttold
);
debug(F101
,"ttopen ioctl TCGETA ttold.c_lflag","",ttold
.c_lflag
);
ioctl(ttyfd
,TCGETA
,&ttraw
);
ioctl(ttyfd
,TCGETA
,&tttvt
);
debug(F101
,"ttopen gtty ttold.sg_flags","",ttold
.sg_flags
);
#ifdef sony_news /* Sony NEWS */
if (ioctl(ttyfd
,TIOCKGET
,&km_ext
) < 0) { /* Get console Kanji mode */
perror("ttopen error getting Kanji mode");
debug(F101
,"ttopen error getting Kanji mode","",0);
km_ext
= -1; /* Make sure this stays undefined. */ tcharf
= 0; /* In remote mode, also get */ if (xlocal
== 0) { /* special characters */
if (ioctl(ttyfd
,TIOCGETC
,&tchold
) < 0) {
debug(F100
,"ttopen TIOCGETC failed","",0);
tcharf
= 1; /* It worked. */ ioctl(ttyfd
,TIOCGETC
,&tchnoi
); /* Get another copy */
debug(F100
,"ttopen TIOCGETC ok","",0);
debug(F100
,"ttopen TIOCGETC not defined","",0);
ltcharf
= 0; /* In remote mode, also get */ if (xlocal
== 0) { /* local special characters */
if (ioctl(ttyfd
,TIOCGLTC
,<chold
) < 0) {
debug(F100
,"ttopen TIOCGLTC failed","",0);
ltcharf
= 1; /* It worked. */ ioctl(ttyfd
,TIOCGLTC
,<chnoi
); /* Get another copy */
debug(F100
,"ttopen TIOCGLTC ok","",0);
debug(F100
,"ttopen TIOCGLTC not defined","",0);
if (ioctl(ttyfd
,TIOCLGET
,&lmode
) < 0) {
debug(F100
,"ttopen TIOCLGET failed","",0);
debug(F100
,"ttopen TIOCLGET ok","",0);
gtty(ttyfd
,&ttraw
); /* And a copy of it for packets*/
gtty(ttyfd
,&tttvt
); /* And one for virtual tty service */
#endif /* BSD44ORPOSIX */
/* Section for changing line discipline. It's restored in ttres(). */
/* For 4.1BSD only, force "old" tty driver, new one botches TANDEM. */
ioctl(ttyfd
, TIOCGETD
, &ttld
); /* Get and save line discipline */
debug(F101
,"4.1bsd line discipline","",ttld
);
k
= OTTYDISC
; /* Switch to "old" discipline */ k
= ioctl(ttyfd
, TIOCSETD
, &k
); debug(F101
,"4.1bsd tiocsetd","",k
);
/* This was previously done before the last two TCGETA or gtty above,
* in both the ATTSV and not-ATTSV case. If it is not okay to have only
* one copy if it here instead, give us a shout!
sio_$
control((short)ttyfd
, sio_$raw_nl
, false, st
); if (xlocal
) { /* ignore breaks from local line */
sio_$
control((short)ttyfd
, sio_$int_enable
, false, st
); sio_$
control((short)ttyfd
, sio_$quit_enable
, false, st
); ttraw
.c_line
= 0; /* STTY line 0 for VX/VE */ tttvt
.c_line
= 0; /* STTY line 0 for VX/VE */ ioctl(ttyfd
,TCSETA
,&ttraw
);
/* If O_NDELAY was used during open(), then remove it now. */
if (fcntl(ttyfd
, F_GETFL
, 0) & O_NDELAY
) {
if (fcntl(ttyfd
,F_SETFL
, fcntl(ttyfd
, F_GETFL
, 0) & ~O_NDELAY
) < 0 )
perror("Can't unset O_NDELAY");
/* Some systems, notably Xenix (don't know how common this is in
* other systems), need special treatment to get rid of the O_NDELAY
* behaviour on read() with respect to carrier presence (i.e. read()
* returning 0 when carrier absent), even though the above fcntl()
* is enough to make read() wait for input when carrier is present.
* This magic, in turn, requires CLOCAL for working when the carrier
* is absent. But if xlocal == 0, presumably you already have CLOCAL
* or you have a carrier, otherwise you wouldn't be running this.
tcsetattr(ttyfd
, TCSADRAIN
, &ttraw
);
ioctl(ttyfd
, TCSETA
, &ttraw
);
/* Reportedly lets uugetty grab the device in SCO UNIX 3.2 / XENIX 2.3 */
close( priv_opn(ttname
, O_RDWR
) ); /* Magic to force change. */
/* Instruct the system how to treat the carrier, and set a few other tty
* This also undoes the temporary setting of CLOCAL that may have been done
* for the close(open()) above (except in Xenix). Also throw in ~ECHO, to
* prevent the other end of the line from sitting there talking to itself,
* producing garbage when the user performs a connect.
* SCO Xenix unfortunately seems to ignore the actual state of CLOCAL.
* Now it thinks CLOCAL is always on. It seems the only real solution for
* Xenix is to switch between the lower and upper case device names.
* This section may at some future time expand into setting a complete
* collection of tty parameters, or call a function shared with ttpkt()/
* ttvt() that does so. On the other hand, the initial parameters are not
* that important, since ttpkt() or ttvt() should always fix that before
* any communication is done. Well, we'll see...
carrctl(&ttraw
, ttcarr
== CAR_ON
);
tcsetattr(ttyfd
, TCSADRAIN
, &ttraw
);
ioctl(ttyfd
, TCSETA
, &ttraw
);
#endif /* BSD44ORPOSIX */
/* ttflui(); This fails for some reason */
debug(F101
,"ttopen ttspeed","",ttspeed
);
/* Done, make entries in debug log, restore Ctrl-C trap, and return. */
debug(F101
,"ttopen, ttyfd","",ttyfd
);
debug(F101
," lcl","",*lcl
);
debug(F111
," lock file",flfnam
,lkf
);
/* D O _ O P E N -- Do the right kind of open() call for the tty. */
do_open(ttname
) char *ttname
; {
#ifndef O_NDELAY /* O_NDELAY not defined */
return(priv_opn(ttname
,2));
#else /* O_NDELAY defined */
Open comms line without waiting for carrier so initial call does not hang
because state of "modem" is likely unknown at the initial call -jrd.
If this is needed for the getty stuff to work, and the open would not work
without O_NDELAY when getty is still on, then this special case is ok.
Otherwise, get rid of it. -ske
return(priv_opn(ttname
, O_RDWR
| O_NDELAY
));
/* Normal case. Use O_NDELAY according to SET CARRIER. See ttscarr(). */
return(priv_opn(ttname
, O_RDWR
| ((ttcarr
!= CAR_ON
) ? O_NDELAY
: 0) ));
/* T T C L O S -- Close the TTY, releasing any lock. */
ttclos(foo
) int foo
; { /* Arg req'd for signal() prototype */
debug(F101
,"ttclos ttyfd","",ttyfd
);
if (ttyfd
< 0) return(0); /* Wasn't open. */
if (ttfdflg
) return(0); /* If we got ttyfd from another */
/* process, don't close it. */
if (netconn
) { /* Network connection. */
debug(F100
,"ttclos closing net","",0);
netclos(); /* Close it. */
if (xlocal
) ioctl(ttyfd
,TIOCHPCL
, NULL
);
if (xlocal
) ioctl(ttyfd
, TIOCNCAR
, NULL
);
debug(F100
,"ttclos about to call ttunlck","",0);
if (ttunlck()) /* Release uucp-style lock */
fprintf(stderr
,"Warning, problem releasing lock\r\n");
debug(F100
,"ttclos about to call ttres","",0);
saval
= signal(SIGALRM
,timerh
); /* Enable timer interrupt. */ xx
= alarm(5); /* Allow 5 seconds for this. */ debug(F101
,"ttclos alarm","",xx
);
if (setjmp(sjbuf
)) { /* Timer went off? */
} else { /* What we're really trying to do */
tthang(); /* Hang up first, then... */
ttres(); /* reset device modes. */
debug(F101
,"ttclos about to call close","",ttyfd
);
close(ttyfd
); /* Close the device. */
ttimoff(); /* Turn off timer. */
fprintf(stderr
,"?Timed out closing device: %s\n",ttnmsv
);
debug(F100
,"ttclos timed out","",0);
ttyfd
= -1; /* Invalidate the file descriptor. */ km_ext
= -1; /* Invalidate device's Kanji-mode *//* For bidirectional lines, restore getty if it was there before. */
#ifdef ACUCNTRL /* 4.3BSD acucntrl() method. */
acucntrl("enable",ttnmsv
); /* Enable getty on the device. */
#ifdef ATT7300 /* ATT UNIX PC (3B1, 7300) method. */
if (attmodem
& DOGETY
) /* Was getty(1m) running before us? */
ongetty(ttnmsv
); /* Yes, restart getty on tty line */
attmodem
&= ~DOGETY
; /* No phone in use, getty restored */#endif /* System-dependent getty-restoring methods */
debug(F100
,"ttclos done","",0);
/* T T H A N G -- Hangup phone line or network connection. */
1 if it believes that it hung up successfully.
-1 if it believes that the hangup attempt failed.
#define HUPTIME 500 /* Milliseconds for hangup */
int x
= 0; /* Sometimes used as return code. */
#ifdef SVORPOSIX /* AT&T, POSIX, HPUX declarations. */
int spdsav
; /* for saving speed */
mflag dtr_down
= 00000000000, int flags
; /* fcntl flags */
if (ttyfd
< 0) return(0); /* Don't do this if not open */
if (xlocal
< 1) return(0); /* Don't do this if not local */
if (netconn
) /* Network connection. */
return((netclos() < 0) ? -1 : 1); /* Just close it. */
/* From here down, we handle real tty devices. */
/* Should add some error checking here... */
debug(F100
,"tthang POSIX style","",0);
spdsav
= cfgetospeed(&ttcur
); /* Get current speed */ spdsavi
= cfgetispeed(&ttcur
); /* Get current speed */ cfsetospeed(&ttcur
,B0
); /* Replace by 0 */
if (tcsetattr(ttyfd
,TCSADRAIN
,&ttcur
) == -1)
debug(F100
,"tthang tcsetattr fails","",errno
);
msleep(HUPTIME
); /* Sleep */
cfsetospeed(&ttcur
,spdsav
); /* Restore previous speed */
cfsetispeed(&ttcur
,spdsavi
);
tcsetattr(ttyfd
,TCSADRAIN
,&ttcur
);
#ifdef aegis /* Apollo Aegis */
sio_$
control((short)ttyfd
, sio_$dtr
, false, st
); /* DTR down */ msleep(HUPTIME
); /* pause */
sio_$
control((short)ttyfd
, sio_$dtr
, true, st
); /* DTR up */#ifdef ANYBSD /* Any BSD version. */
debug(F100
,"tthang BSD style","",0);
if (ioctl(ttyfd
,TIOCCDTR
,0) < 0) { /* Clear DTR. */
debug(F101
,"tthang TIOCCDTR fails","",errno
);
msleep(HUPTIME
); /* For about 1/2 sec */
x
= ioctl(ttyfd
,TIOCSDTR
,0); /* Restore DTR */ For some reason, this tends to fail with "no such device or address"
but the operation still works, probably because of the close/open
later on. So let's not scare the user unnecessarily here.
debug(F101
,"tthang TIOCSDTR errno","",errno
); /* Log the error */
x
= 1; /* Pretend we succeeded */ } else if (x
== 0) x
= 1; /* Success */
ioctl(ttyfd
, TIOCSAVEMODES
, 0);
ioctl(ttyfd
, TIOCHPCL
, 0);
close(ttyfd
); /* Yes, must do this twice */
if ((ttyfd
= open(ttnmsv
,2)) < 0) /* on Fortune computers... */
return(-1); /* (but why?) */
close(do_open(ttnmsv
)); /* Clear i/o error condition */
/* This is definitely dangerous. Why was it here? */
z
= ttvt(ttspeed
,ttflow
); /* Restore modes. */ debug(F101
,"tthang ttvt returns","",z
);
/* AT&T UNIX section, includes HP-UX and generic AT&T System III/V... */
/* Hewlett Packard allows explicit manipulation of modem signals. */
debug(F100
,"tthang HP-UX style","",0);
if (ioctl(ttyfd
,MCSETAF
,&dtr_down
) < 0) /* lower DTR */
return(-1); /* oops, can't. */
msleep(HUPTIME
); /* Pause half a second. */
x
= 1; /* Set return code */ if (ioctl(ttyfd
,MCGETA
,&modem_rtn
) > -1) { /* Get line status. */
if ((modem_rtn
& MDCD
) != 0) /* Check if CD is low. */
x
= -1; /* CD didn't drop, fail. */ /* Even if above calls fail, RTS & DTR should be turned back on. */
if (ioctl(ttyfd
,MCSETAF
,&modem_rtn
) < 0) x
= -1;
/* New way, from Hellmuth Michaelis */
debug(F100
,"tthang HP-UX style, HPUXDEBUG","",0);
if (ioctl(ttyfd
,MCGETA
,&modem_rtn
) == -1) { /* Get current status. */
debug(F100
,"tthang HP-UX: can't get modem lines, NO HANGUP!","",0);
sprintf(modem_state
,"%#lx",modem_rtn
);
debug(F110
,"tthang HP-UX: modem lines got = ",modem_state
,0);
modem_sav
= modem_rtn
; /* save line status */ modem_rtn
&= ~MDTR
; /* DTR bit down */ sprintf(modem_state
,"%#lx",modem_rtn
);
debug(F110
,"tthang HP-UX: modem lines lowered DTR = ",modem_state
,0);
if (ioctl(ttyfd
,MCSETAF
,&modem_rtn
) < 0) { /* lower DTR */
debug(F100
,"tthang HP-UX: can't lower DTR!","",0);
return(-1); /* oops, can't. */
msleep(HUPTIME
); /* Pause half a second. */
x
= 1; /* Set return code */ if (ioctl(ttyfd
,MCGETA
,&modem_rtn
) > -1) { /* Get line status. */
sprintf(modem_state
,"%#lx",modem_rtn
);
debug(F110
,"tthang HP-UX: modem lines got = ",modem_state
,0);
if ((modem_rtn
& MDCD
) != 0) { /* Check if CD is low. */
debug(F100
,"tthang HP-UX: DCD didn't get down!","",0);
x
= -1; /* CD didn't drop, fail. */ debug(F100
,"tthang HP-UX: DCD down!","",0);
debug(F100
,"tthang HP-UX: can't get DCD status !","",0);
/* Even if above calls fail, RTS & DTR should be turned back on. */
modem_sav
|= (MRTS
| MDTR
); if (ioctl(ttyfd
,MCSETAF
,&modem_sav
) < 0) {
debug(F100
,"tthang HP-UX: can't set saved state |=(RTS | DTR)","",0);
sprintf(modem_state
,"%#lx",modem_sav
);
debug(F110
,"tthang HP-UX: final modem lines = ",modem_state
,0);
#else /* AT&T but not HP-UX */
/* SVID for AT&T System V R3 defines ioctl's for handling modem signals. */
/* It is not known how many, if any, systems actually implement them, */
/* so we include them here in ifdef's. */
No modem-signal twiddling for IBM RT PC or RS/6000.
In AIX 3.1 and earlier, the ioctl() call is broken.
This code could be activated for AIX 3.1 with PTF 2006 or later
(e.g. AIX 3.2), but close/open does the job too, so why bother.
#ifdef TIOCMBIS /* Bit Set */
#ifdef TIOCMBIC /* Bit Clear */
#ifdef TIOCM_DTR /* DTR */
/* Clear DTR, sleep 300 msec, turn it back on. */
/* If any of the ioctl's return failure, go on to the next section. */
z
= TIOCM_DTR
; /* Code for DTR. */#ifdef TIOCM_RTS /* Lower RTS too if symbol is known. */
debug(F101
,"tthang TIOCM signal mask","",z
);
if (ioctl(ttyfd
,TIOCMBIC
,&z
) > -1) { /* Try to lower DTR. */
debug(F100
,"tthang TIOCMBIC ok","",0);
msleep(HUPTIME
); /* Pause half a second. */
if (ioctl(ttyfd
,TIOCMBIS
,&z
) > -1) { /* Try to turn it back on. */
debug(F100
,"tthang TIOCMBIS ok","",0);
return(1); /* Success, done. */
} else { /* Couldn't raise, continue. */
debug(F101
,"tthang TIOCMBIS errno","",errno
);
} else { /* Couldn't lower, continue. */
debug(F101
,"tthang TIOCMBIC errno","",errno
);
General AT&T UNIX case, not HPUX. The following code is highly suspect. No
two AT&T-based systems seem to do this the same way. The object is simply
to turn off DTR and then turn it back on. SVID says the universal method
for turning off DTR is to set the speed to zero, and this does seem to do
the trick in all cases. But neither SVID nor any known man pages say how to
turn DTR back on again. Some variants, like most Xenix implementations,
raise DTR again when the speed is restored to a nonzero value. Others
require the device to be closed and opened again, but this is risky because
getty could seize the device during the instant it is closed.
/* Return code for ioctl failures... */
x
= 1; /* ATT6300 doesn't want to fail... */ debug(F100
,"tthang get settings","",0);
if (ioctl(ttyfd
,TCGETA
,&ttcur
) < 0) /* Get current settings. */
return(x
); /* Fail if this doesn't work. */
if ((flags
= fcntl(ttyfd
,F_GETFL
,0)) < 0) /* Get device flags. */
ttc_save
= ttcur
.c_cflag
; /* Remember current speed. */ spdsav
= ttc_save
& CBAUD
; debug(F101
,"tthang speed","",spdsav
);
debug(F100
,"tthang turning O_NDELAY on","",0);
fcntl(ttyfd
, F_SETFL
, flags
| O_NDELAY
); /* Activate O_NDELAY */
#ifdef ATT7300 /* This is the way it is SUPPOSED to work */
ttcur
.c_cflag
&= ~CBAUD
; /* Change the speed to zero. */ ttcur
.c_cflag
&= ~CBAUD
; /* Change the speed to zero. */#else /* This way really works but may be dangerous */
ttcur
.c_cflag
= ~(CBAUD
|CLOCAL
); /* Special for AT&T 3B2s */ /* (CLOCAL must be OFF) */
#ifdef SCO3R2 /* SCO UNIX 3.2 */
This is complete nonsense, but an SCO user claimed this change made
hanging up work. Comments from other SCO UNIX 3.2 users would be
ttcur
.c_cflag
= CBAUD
|B0
;#else /* None of the above. */
ttcur
.c_cflag
= CLOCAL
|HUPCL
; /* Change all but these to zero */ /* (CLOCAL must be ON) */
/* and if none of those work, try one of these... */
ttcur
.c_cflag
&= ~(CBAUD
|HUPCL
); ttcur
.c_cflag
&= ~(CBAUD
|CREAD
); ttcur
.c_cflag
&= ~(CBAUD
|CREAD
|HUPCL
); /* or other combinations */
debug(F100
,"tthang TCXONC","",0);
debug(F100
,"tthang TIOCSTART","",0);
ioctl(ttyfd
, TIOCSTART
, 0);
if (ioctl(ttyfd
,TCSETAF
,&ttcur
) < 0) { /* Fail if we can't. */
fcntl(ttyfd
, F_SETFL
, flags
); /* Restore flags */
return(-1); /* before returning. */
msleep(300); /* Give modem time to notice. */
/* Now, even though it doesn't say this in SVID or any man page, we have */
/* to close and reopen the device. This is not necessary for all systems, */
/* but it's impossible to predict which ones need it and which ones don't. */
Special handling for ATT 7300 UNIX PC and 3B1, which have "phone"
related ioctl's for their internal modems. attmodem has getty status and
modem-in-use bit. Reportedly the ATT7300/3B1 PIOCDISC call is necessary,
but also ruins the file descriptor, and no other phone(7) ioctl call can fix
it. Whateverit does, it seems to escape detection with PIOCGETA and TCGETA.
The only way to undo the damage is to close the fd and then reopen it.
if (attmodem
& ISMODEM
) {
debug(F100
,"tthang attmodem close/open","",0);
ioctl(ttyfd
,PIOCUNHOLD
,&dialer
); /* Return call to handset. */
ioctl(ttyfd
,PIOCDISC
,&dialer
); /* Disconnect phone. */
close(ttyfd
); /* Close and reopen the fd. */
ttyfd
= priv_opn(ttnmsv
, O_RDWR
| O_NDELAY
); attmodem
&= ~ISMODEM
; /* Phone no longer in use. *//* It seems we have to close and open the device for other AT&T systems */
/* too, and this is the place to do it. The following code does the */
/* famous close(open(...)) magic by default. If that doesn't work for you, */
/* then try uncommenting the following statement or putting -DCLSOPN in */
/* the makefile CFLAGS. */
#ifndef SCO32 /* Not needed by, and harmful to, SCO UNIX 3.2 / Xenix 2.3 */
#define OPENFLGS O_RDWR | O_NDELAY
/* This method is used by default, i.e. unless CLSOPN is defined. */
/* It is thought to be safer because there is no window where getty */
/* can seize control of the device. The drawback is that it might not work. */
debug(F101
,"tthang close(open()), OPENFLGS","",OPENFLGS
);
close(priv_opn(ttnmsv
, OPENFLGS
));
/* This method is used if you #define CLSOPN. It is more likely to work */
/* than the previous method, but it's also more dangerous. */
debug(F101
,"tthang close/open, OPENFLGS","",OPENFLGS
);
ttyfd
= priv_opn(ttnmsv
, OPENFLGS
); /* Open it again *//* Now put all flags & modes back the way we found them. */
/* (Does the order of ioctl & fcntl matter ? ) */
debug(F100
,"tthang restore settings","",0);
ttcur
.c_cflag
= ttc_save
; /* Get old speed back. */ if (ioctl(ttyfd
,TCSETAF
,&ttcur
) < 0) /* ioctl parameters. */
This is required for IBM RT and RS/6000, probably helps elsewhere too (?).
After closing a modem line, the modem will probably not be asserting
carrier any more, so we should not require carrier any more. If this
causes trouble on non-IBM UNIXes, change the #ifdef to use _IBMR2 rather
flags
&= ~O_NDELAY
; /* Don't require carrier on reopen */ if (fcntl(ttyfd
,F_SETFL
,flags
) < 0) /* fcntl parameters */
#endif /* BSD44ORPOSIX */
Major change in 5A(174). We used to use LPASS8, if it was defined, to
allow 8-bit data and Xon/Xoff flow control at the same time. But this
LPASS8 business seems to have been causing trouble for everybody but me!
For example, Annex terminal servers, commonly used with Encore computers,
do not support LPASS8 even though the Encore itself does. Ditto for many
other terminal servers, TELNET connections, rlogin connections, etc etc.
Now, reportedly, even vanilla 4.3 BSD systems can't do this right on their
serial lines, even though LPASS8 is a feature of 4.3BSD. So let's turn it
off for everybody. That means we goes back to using raw mode, with no
NOTE: This must be done before the first reference to LPASS8 in this file,
and after the last #include statment.
/* T T R E S -- Restore terminal to "normal" mode. */
/* ske@pkmab.se: There are two choices for what this function should do.
* (1) Restore the tty to current "normal" mode, with carrier treatment
* according to ttcarr, to be used after every kermit command. (2) Restore
* the tty to the state it was in before kermit opened it. These choices
* conflict, since ttold can't hold both choices of tty parameters. ttres()
* is currently being called as in choice (1), but ttold basically holds
* the initial parameters, as in (2), and the description at the beginning
* I don't think restoring tty parameters after all kermit commands makes
* much of a difference. Restoring them upon exit from kermit may be of
* some use in some cases (when the line is not restored automatically on
* close, by the operating system).
* I can't choose which one it should be, so I haven't changed it. It
* probably works as it is, too. It would probably even work even with
* ttres() entirely deleted...
* (from fdc: Actually, this function operates in remote mode too, so
* it restores the console (command) terminal to whatever mode it was
* in before packet operations began, so that commands work right again.)
ttres() { /* Restore the tty to normal. */
if (ttyfd
< 0) return(-1); /* Not open. */
if (ttfdflg
) return(0); /* Don't mess with terminal modes if */
/* we got ttyfd from another process */
if (netconn
) return (0); /* Network connection, do nothing */
/* Real terminal device, so restore its original modes */
#ifdef BSD44ORPOSIX /* For POSIX like this */
x
= tcsetattr(ttyfd
,TCSADRAIN
,&ttold
);#else /* For all others... */
#ifdef ATTSV /* For AT&T versions... */
x
= ioctl(ttyfd
,TCSETAW
,&ttold
); /* Restore tty modes this way. */ msleep(HUPTIME
); /* This replaces sleep(1)... */
/* Put back sleep(1) if tty is */
/* messed up after close. */
/* Here we restore the modes for BSD */
#ifdef LPASS8 /* Undo "pass8" if it were done */
if (ioctl(ttyfd
,TIOCLSET
,&lmode
) < 0)
debug(F100
,"ttres TIOCLSET failed","",0);
debug(F100
,"ttres TIOCLSET ok","",0);
#ifdef CK_DTRCTS /* Undo hardware flow if it were done */
if (ioctl(ttyfd
,TIOCLSET
,&lmode
) < 0)
debug(F100
,"ttres TIOCLSET failed","",0);
debug(F100
,"ttres TIOCLSET ok","",0);
#ifdef TIOCGETC /* Put back special characters */
if (tcharf
&& (xlocal
== 0)) {
if (ioctl(ttyfd
,TIOCSETC
,&tchold
) < 0)
debug(F100
,"ttres TIOCSETC failed","",0);
debug(F100
,"ttres TIOCSETC ok","",0);
#ifdef TIOCGLTC /* Put back local special characters */
if (ltcharf
&& (xlocal
== 0)) {
if (ioctl(ttyfd
,TIOCSLTC
,<chold
) < 0)
debug(F100
,"ttres TIOCSLTC failed","",0);
debug(F100
,"ttres TIOCSLTC ok","",0);
x
= stty(ttyfd
,&ttold
); /* restore tty modes the old way. */#endif /* BSD44ORPOSIX */
debug(F101
,"ttres tty modes restore","",x
);
if (x
< 0) debug(F101
,"ttres errno","",errno
);
if (ttld
> -1) { /* Put back line discipline */
x
= ioctl(ttyfd
, TIOCSETD
, &ttld
); debug(F101
,"ttres line discipline restore","",x
);
if (x
< 0) debug(F101
,"...ioctl errno","",errno
);
x
= xlocal
? km_ext
: km_con
; /* Restore Kanji mode. */ if (x
!= -1) { /* Make sure we know original modes. */
if (ioctl(ttyfd
,TIOCKSET
, &x
) < 0) {
perror("ttres can't set Kanji mode");
debug(F101
,"ttres error setting Kanji mode","",x
);
debug(F100
,"ttres set Kanji mode ok","",0);
tvtflg
= 0; /* Invalidate terminal mode settings *//* T T R P I D -- Read pid from lockfile "name" (used by ttlock) */
ttrpid(name
) char *name
; {
fd
= open(name
,O_RDONLY
); /* Try to open lockfile. */ x
= read(fd
, buf
, 11); /* For HDP UUCP, read pid string */ x
= sscanf(buf
,"%d",&pid
); /* Get the integer pid from it. */ x
= read(fd
, (char *)&pid
, sizeof(pid
)); /* Else read integer pid */ if (x
< 0) pid
= -1; /* Return any errors. */
close(fd
); /* Close the lockfile. */
This function attempts to coordinate use of the communication device with
other copies of Kermit and any other program that follows the UUCP
device-locking conventions, which, unfortunately, vary among different UNIX
implementations. The idea is to look for a file of a certain name, the
"lockfile", in a certain directory. If such a file is found, then the line
is presumed to be in use, and Kermit should not use it. If no such file is
found, Kermit attempts to create one so that other programs will not use the
same line at the same time. Because the lockfile and/or the directory it's
in might lack write permission for the person running Kermit, Kermit could
find itself running setuid to uucp or other user that does have the
necessary permissions. At startup, Kermit has changed its effective uid to
the user's real uid, and so ttlock() must switch back to the original
effective uid in order to create the lockfile, and then back again to the
real uid to prevent unauthorized access to other directories or files owned
by the user the program is setuid to.
Totally rewritten for C-Kermit 5A to eliminate windows of vulnerability,
based on suggestions from Warren Tucker. Call with pointer to name of
Note: Once privileges are turned on using priv_on(), it is essential that
they are turned off again before this function returns.
#ifdef SVR4 /* Lockfile uses device numbers. */
#ifndef LFDEVNO /* Define this for SVR4 */
#ifndef AIXRS /* But not for RS/6000 AIX 3.2 */
#define LFDEVNO /* If anybody else needs it, */
#endif /* LFDEVNO */ /* define it here or on CC */
#endif /* SVR4 */ /* command line. */
#include <sys/stat.h> /* For major() & minor() macros. */
/* Should be in <sys/types.h>. */
#ifndef major /* If we didn't find it */
#ifdef SVR4 /* then for Sys V R4 */
#include <sys/mkdev.h> /* look here */
#else /* or for Sunos versions */
#include <sys/sysmacros.h> /* look here */
#else /* Otherwise take a chance: */
#define major(dev) ( (int) ( ((unsigned)(dev) >> 8) & 0xff))
#define minor(dev) ( (int) ( (dev) & 0xff))
Note for RS/6000: routines ttylock(devicename), ttyunlock(devicename),
and ttylocked(devicename) from the standard library (libc.a) could be
used here instead. It's not clear whether there is any advantage in this.
ttlock(ttdev
) char *ttdev
; {
int lockfd
; /* File descriptor for lock file. */
PID_T pid
; /* Process id of this process. */ int fpid
; /* pid found in existing lockfile. */
int tries
; /* How many times we've tried... */
struct stat devbuf
; /* For device numbers (SVR4). */
char pid_str
[12]; /* My pid in string format. */
#define LFNAML 50 /* Max length for lock file name. */
char lockfil
[LFNAML
]; /* Lock file name */
char lklockf
[LFNAML
]; /* Name for link to lock file */
char tmpnam
[LFNAML
+30]; /* Temporary lockfile name. */
char *lockdir
= LOCK_DIR
; /* Defined near top of this file, */
/* or on cc command line. */
haslock
= 0; /* Not locked yet. */ *flfnam
= '\0'; /* Lockfile name is empty. */
pid
= getpid(); /* Get id of this process. *//* Construct name of lockfile and temporary file */
/* device = name of tty device without the path, e.g. "ttyh8" */
/* lockfil = name of lock file, without path, e.g. "LCK..ttyh8" */
device
= ((devname
= xxlast(ttdev
,'/')) != NULL
? devname
+1 : ttdev
);#ifdef ISIII /* Interactive System III, PC/IX */
#ifdef LFDEVNO /* Lockfilename has device numbers. */
if (stat(ttdev
,&devbuf
) < 0)
sprintf(lockfil
,"LK.%03d.%03d.%03d",
major(devbuf
.st_dev
), /* inode */
major(devbuf
.st_rdev
), /* major device number */
minor(devbuf
.st_rdev
)); /* minor device number */
#ifdef PTX /* Dynix PTX */
if (device
!= &ttdev
[5] && strncmp(ttdev
,"/dev/",5)==0) {
sprintf(lockfil
,"LCK..%.3s%s", &ttdev
[5], device
);
sprintf(lockfil
,"LCK..%s", device
);
#ifdef M_XENIX /* SCO Xenix */
x
= (int)strlen(lockfil
) - 1; /* Get last letter of device name. */ if (x
> 0) { /* If it's uppercase, lower it. */
if (c
>= 'A' && c
<= 'Z') lockfil
[x
] += ('a' - 'A');
/* flfnam = full lockfile pathname, e.g. "/usr/spool/uucp/LCK..ttyh8" */
/* tmpnam = temporary unique, e.g. "/usr/spool/uucp/LTMP..pid" */
sprintf(flfnam
,"%s/%s",lockdir
,lockfil
);
sprintf(lkflfn
,"%s/%s",lockdir
,lklockf
);
sprintf(tmpnam
,"%s/LTMP.%05d",lockdir
,(int) pid
);
debug(F110
,"ttlock flfnam",flfnam
,0);
debug(F110
,"ttlock tmpnam",tmpnam
,0);
priv_on(); /* Turn on privileges if possible. */
lockfd
= creat(tmpnam
, 0444); /* Try to create temp lock file. */ if (lockfd
< 0) { /* Create failed. */
debug(F111
,"ttlock creat failed",tmpnam
,errno
);
printf("UUCP not installed or Kermit misconfigured\n");
unlink(tmpnam
); /* Get rid of the temporary file. */
priv_off(); /* Turn off privileges!!! */
return(-1); /* Return failure code. */
/* Now write the pid into the temp lockfile in the appropriate format */
#ifdef PIDSTRING /* For Honey DanBer UUCP, */
sprintf(pid_str
,"%10d\n", (int) pid
); /* Write pid as decimal string. */
write(lockfd
, pid_str
, 11);
debug(F111
,"ttlock hdb pid string",pid_str
,(int) pid
);
#else /* Others use integer pid */
write(lockfd
, (char *)&pid
, sizeof(pid
) );
debug(F111
,"ttlock pid","",(int) pid
);
/* Now try to rename the temp file to the real lock file name. */
/* This will fail if a lock file of that name already exists. */
close(lockfd
); /* Close the temp lockfile. */
chmod(tmpnam
,0444); /* Permission for a valid lock. */
while (!haslock
&& tries
++ < 2) {
haslock
= (link(tmpnam
,flfnam
) == 0); /* Create a link to it. */ if (haslock
) { /* If we got the lockfile */
Advisory file locking works on SVR4, so we use it. In fact, it is
necessary in some cases, e.g. when SLIP is involved.
while ( lockf(ttyfd
, F_TLOCK
, 0L) != 0 ) {
debug(F111
, "ttlock: lockf returns errno", "", errno
);
if ( (++tries
>= 3) || (errno
!= EAGAIN
) ) {
x
= unlink(flfnam
); /* remove the lockfile */ debug(F111
,"ttlock unlink",flfnam
,x
);
if (haslock
) /* If we got an advisory lock */
} else { /* We didn't create a new lockfile. */
if ((fpid
= ttrpid(flfnam
)) > -1) { /* Read pid from old one. */
debug(F101
,"ttlock fpid","",fpid
);
errno
= 0; /* See if process still exists. */ x
= kill((PID_T
) fpid
,0); debug(F101
,"ttlock kill","",x
);
debug(F101
,"ttlock kill errno","",errno
);
if (x
< 0 && errno
== ESRCH
) { /* pid is invalid */
debug(F111
,"ttlock removing stale lock",flfnam
,
"Removing stale lock %s (pid %d terminated)\n",
x
= unlink(flfnam
); /* remove the lockfile. */ debug(F111
,"ttlock unlink",flfnam
,x
);
continue; /* and go back and try again. */
} else if ((x
< 0 && errno
== EPERM
) || x
== 0) {
unlink(tmpnam
); /* Delete the tempfile */
debug(F101
,"ttlock found tty locked","",fpid
);
priv_off(); /* Turn off privs */
return(-2); /* Code for device is in use. */
debug(F101
,"ttlock can't get fpid","",fpid
);
} else break; /* Couldn't read pid from old file */
unlink(tmpnam
); /* Unlink (remove) the temp file. */
priv_off(); /* Turn off privs */
return(haslock
? 0 : -1); /* Return link's return code. */
ttunlck() { /* Remove UUCP lockfile. */
if (haslock
&& *flfnam
) {
priv_on(); /* Turn privileges on. */
unlink(flfnam
); /* Remove the lockfile. */
unlink(lkflfn
); /* Remove other lockfile */
(void) lockf(ttyfd
, F_ULOCK
, 0L); /* Remove advisory lock */
*flfnam
= '\0'; /* Erase the name. */
priv_off(); /* Turn privileges off. */
/* 4.3BSD-style UUCP line direction control (Stan Barber, Rice U) */
acucntrl(flag
,ttname
) char *flag
, *ttname
; {
char x
[DEVNAMLEN
+32], *device
, *devname
;
if (strcmp(ttname
,CTTNAM
) == 0 || xlocal
== 0) /* If not local, */
return; /* just return. */
device
= ((devname
= xxlast(ttname
,'/')) != NULL
? devname
+1 : ttname
); if (strncmp(device
,"LCK..",4) == 0) device
+= 5;
sprintf(x
,"/usr/lib/uucp/acucntrl %s %s",flag
,device
);
debug(F110
,"called ",x
,0);
T T H F L O W -- Set hardware flow control.
tthflow(flow
) int flow
; {
int x
= 0; /* Return code */
/* There is no hardware flow control in POSIX. */
For SunOS 4.0 and later in the BSD environment ...
The declarations are copied and interpreted from the System V header files,
so we don't actually have to pull in all the System V junk when building
C-Kermit for SunOS in the BSD environment, which would be dangerous because
having those symbols defined would cause us to take the wrong paths through
the code. The code in this section is used in both the BSD and Sys V SunOS
In SunOS 4.1 and later, we use the POSIX calls rather than ioctl calls
because GNU CC uses different formats for the _IOxxx macros than regular CC;
the POSIX forms work for both. But the POSIX calls are not available in
#define CRTSCTS 0x80000000 /* RTS/CTS flow control */
#define TCSANOW 0 /* Do it now */
unsigned long c_iflag
; /* Input modes */
unsigned long c_oflag
; /* Output modes */
unsigned long c_cflag
; /* Control modes */
unsigned long c_lflag
; /* Line discipline modes */
_PROTOTYP( int tcgetattr
, (int, struct termios
*) );
_PROTOTYP( int tcsetattr
, (int, int, struct termios
*) );
When CRTSCTS is set, SunOS won't do output unless both CTS and CD are
asserted. So we don't set CRTSCTS unless CD is up. This should be OK,
since we don't need RTS/CTS during dialing, and after dialing is complete,
we should have CD. If not, we still communicate, but without RTS/CTS.
int mflags
; /* Modem signal flags */
if (ioctl(ttyfd
,TIOCMGET
,&mflags
) > -1 && /* Get modem signals */
(mflags
& TIOCM_CAR
)) { /* Check for CD */
debug(F100
,"tthflow SunOS has CD","",0);
if (tcgetattr(ttyfd
, &temp
) > -1 && /* Get device attributes */
!(temp
.c_cflag
& CRTSCTS
)) { /* Check for RTS/CTS */
temp
.c_cflag
|= CRTSCTS
; /* Not there, add it */ x
= tcsetattr(ttyfd
,TCSANOW
,&temp
); } else debug(F100
,"tthflow SunOS no CD","",0);
SunOS 4.0 (and maybe earlier?). This code is dangerous because it
prevents compilation with GNU gcc, which uses different formats for the
_IORxxx macros than regular cc. SunOS 4.1 and later can use the POSIX
routines in the #else part of this clause, which work for both cc and gcc.
#define TCGETS _IOR(T, 8, struct termios) /* Get modes into termios struct */
#define TCSETS _IOW(T, 9, struct termios) /* Set modes from termios struct */
#define CRTSCTS 0x80000000 /* RTS/CTS flow control */
unsigned long c_iflag
; /* Input modes */
unsigned long c_oflag
; /* Output modes */
unsigned long c_cflag
; /* Control modes */
unsigned long c_lflag
; /* Line discipline modes */
if (ioctl(ttyfd
,TCGETS
,&temp
) > -1) { /* Get current terminal modes. */
temp
.c_cflag
|= CRTSCTS
; /* Add RTS/CTS to them. */ x
= ioctl(ttyfd
,TCSETS
,&temp
); /* Set them again. */#else /* Not SunOS 4.0 or later */
/* RTS/CTS Flow control... */
/* This is the preferred way, according to SVID R4 */
if (ioctl(ttyfd
,TCGETX
,&rctsx
) > -1) {
rctsx
.x_hflag
|= RTSXOFF
| CTSXON
; x
= ioctl(ttyfd
,TCSETX
,&rctsx
); /* DTR/CD Flow control... */
/* This is straight out of SVID R4 */
if (ioctl(ttyfd
,TCGETX
,&rctsx
) > -1) {
rctsx
.x_hflag
|= DTRXOFF
| CDXON
; x
= ioctl(ttyfd
,TCSETX
,&rctsx
); x
= LDODTR
| LDOCTS
; /* Found only on UTEK? */ if (flow
== FLO_DTRT
) { /* Use hardware flow control */
x
= ioctl(ttyfd
,TIOCLBIS
,&x
); debug(F100
,"hardflow TIOCLBIS error","",0);
debug(F100
,"hardflow TIOCLBIS ok","",0);
x
= ioctl(ttyfd
,TIOCLBIC
,&x
); debug(F100
,"hardflow TIOCLBIC error","",0);
debug(F100
,"hardflow TIOCLBIC ok","",0);
/* T T P K T -- Condition the communication line for packets */
/* or for modem dialing */
If called with speed > -1, also set the speed.
Returns 0 on success, -1 on failure.
NOTE: the "xflow" parameter is supposed to be the currently selected
type of flow control, but for historical reasons, this parameter is also
used to indicate that we are dialing. Therefore, when the true flow
control setting is needed, we access the external variable "flow", rather
than trusting our "xflow" argument.
ttpkt(long speed
, int xflow
, int parity
)
ttpkt(speed
,xflow
,parity
) long speed
; int xflow
, parity
;
extern int flow
; /* REAL flow-control setting */
if (ttyfd
< 0) return(-1); /* Not open. */
debug(F101
,"ttpkt parity","",parity
);
debug(F101
,"ttpkt xflow","",xflow
);
debug(F101
,"ttpkt speed","",(int) speed
);
ttprty
= parity
; /* Let other tt functions see these. */ ttpflg
= 0; /* Parity not sensed yet */ ttpmsk
= ttprty
? 0177 : 0377; /* Parity stripping mask */ ttspeed
= speed
; /* Make global copy for this module */#ifdef NETCONN /* Nothing to do for telnet */
if (ttfdflg
&& !isatty(ttyfd
)) return(0);
#ifndef SVORPOSIX /* Berkeley, V7, etc. */
For some reason, with BSD terminal drivers, you can't set FLOW to XON/XOFF
after having previously set it to NONE without closing and reopening the
device. Unless there's something I overlooked below...
if (ttflow
== FLO_NONE
&& flow
== FLO_XONX
&& xlocal
== 0) {
debug(F101
,"ttpkt executing horrible flow kludge","",0);
ttclos(0); /* Close it */
ttopen(ttnmsv
,&x
,ttmdm
,0); /* Open it again */
if (xflow
!= FLO_DIAL
&& xflow
!= FLO_DIAX
)
ttflow
= xflow
; /* Now make this available too. */ s2
= (int) (speed
/ 10L); /* Convert bps to cps */ s
= ttsspd(s2
); /* Check and set the speed */ debug(F101
,"ttpkt carrier","",xflow
);
carrctl(&ttraw
, xflow
!= FLO_DIAL
/* Carrier control */
tvtflg
= 0; /* So ttvt() will work next time */#ifndef SVORPOSIX /* BSD section */
if (flow
== FLO_RTSC
|| /* Hardware flow control */
debug(F100
,"ttpkt hard flow, TANDEM off, RAW on","",0);
ttraw
.sg_flags
&= ~TANDEM
; /* Don't ask for it. */ } else if (flow
== FLO_NONE
) { /* No Xon/Xoff flow control */
debug(F100
,"ttpkt no flow, TANDEM off, RAW on","",0);
ttraw
.sg_flags
&= ~TANDEM
; /* Don't ask for it. *//* NOTE: We should also turn off hardware flow control here! */
} else if (flow
== FLO_KEEP
) { /* Keep device's original setting */
debug(F100
,"ttpkt keeping original TANDEM","",0);
ttraw
.sg_flags
&= ~TANDEM
; ttraw
.sg_flags
|= (ttold
.sg_flags
& TANDEM
);/* NOTE: We should also handle hardware flow control here! */
/* SET FLOW XON/XOFF is in effect, or SET FLOW KEEP resulted in Xon/Xoff */
if ((flow
== FLO_XONX
) || (ttraw
.sg_flags
& TANDEM
)) {
debug(F100
,"ttpkt turning on TANDEM","",0);
ttraw
.sg_flags
|= TANDEM
; /* So ask for it. */#ifdef LPASS8 /* Can pass 8-bit data through? */
/* If the LPASS8 local mode is available, then flow control can always */
/* be used, even if parity is none and we are transferring 8-bit data. */
/* But we only need to do all this if Xon/Xoff is requested. */
/* BUT... this tends not to work through IP or LAT connections, terminal */
/* servers, telnet, rlogin, etc, so it is currently disabled. */
x
= LPASS8
; /* If LPASS8 defined, then */ debug(F100
,"ttpkt executing LPASS8 code","",0);
if (lmodef
) { /* TIOCLBIS must be too. */
x
= ioctl(ttyfd
,TIOCLBIS
,&x
); /* Try to set LPASS8. */ debug(F100
,"ttpkt TIOCLBIS error","",0);
debug(F100
,"ttpkt TIOCLBIS ok","",0);
But if we use LPASS8 mode, we must explicitly turn off
terminal interrupts of all kinds.
#ifdef TIOCGETC /* Not rawmode, */
if (tcharf
&& (xlocal
== 0)) { /* must turn off */
tchnoi
.t_intrc
= -1; /* interrupt character */ tchnoi
.t_quitc
= -1; /* and quit character. */ tchnoi
.t_startc
= 17; /* Make sure xon */ tchnoi
.t_stopc
= 19; /* and xoff not ignored. */ tchnoi
.t_eofc
= -1; /* eof character. */ tchnoi
.t_brkc
= -1; /* brk character. */ if (ioctl(ttyfd
,TIOCSETC
,&tchnoi
) < 0) {
debug(F100
,"ttpkt TIOCSETC failed","",0);
debug(F100
,"ttpkt TIOCSETC ok","",0);
/* only for paranoid debugging */
"intr=%d,quit=%d, start=%d, stop=%d, eof=%d, brk=%d",
foo
.t_intrc
, foo
.t_quitc
, foo
.t_startc
, foo
.t_stopc
, foo
.t_eofc
, foo
.t_brkc
); debug(F110
,"ttpkt chars",tchbuf
,0);
ttraw
.sg_flags
|= CBREAK
; /* Needed for unknown reason *//* Prevent suspend during packet mode */
#ifdef TIOCGLTC /* Not rawmode, */
if (ltcharf
&& (xlocal
== 0)) { /* must turn off */
ltchnoi
.t_suspc
= -1; /* suspend character */ ltchnoi
.t_dsuspc
= -1; /* and delayed suspend character */ if (ioctl(ttyfd
,TIOCSLTC
,&tchnoi
) < 0) {
debug(F100
,"ttpkt TIOCSLTC failed","",0);
debug(F100
,"ttpkt TIOCSLTC ok","",0);
#else /* LPASS8 not defined */
/* Previously, BSD-based implementations always */
/* used rawmode for packets. Now, we use rawmode only if parity is NONE. */
/* This allows the flow control requested above to actually work, but only */
/* if the user asks for parity (which also means they get 8th-bit quoting). */
if (parity
) { /* If parity, */
ttraw
.sg_flags
&= ~RAW
; /* use cooked mode */ ttraw
.sg_flags
|= CBREAK
; debug(F101
,"ttpkt cooked, cbreak, parity","",parity
);
#ifdef TIOCGETC /* Not rawmode, */
if (tcharf
&& (xlocal
== 0)) { /* must turn off */
tchnoi
.t_intrc
= -1; /* interrupt character */ tchnoi
.t_quitc
= -1; /* and quit character. */ tchnoi
.t_startc
= 17; /* Make sure xon */ tchnoi
.t_stopc
= 19; /* and xoff not ignored. */ tchnoi
.t_eofc
= -1; /* eof character. */ tchnoi
.t_brkc
= -1; /* brk character. */ if (ioctl(ttyfd
,TIOCSETC
,&tchnoi
) < 0) {
debug(F100
,"ttpkt TIOCSETC failed","",0);
debug(F100
,"ttpkt TIOCSETC ok","",0);
#ifdef TIOCGLTC /* Not rawmode, */
/* Prevent suspend during packet mode */
if (ltcharf
&& (xlocal
== 0)) { /* must turn off */
ltchnoi
.t_suspc
= -1; /* suspend character */ ltchnoi
.t_dsuspc
= -1; /* and delayed suspend character */ if (ioctl(ttyfd
,TIOCSLTC
,&tchnoi
) < 0) {
debug(F100
,"ttpkt TIOCSLTC failed","",0);
debug(F100
,"ttpkt TIOCSLTC ok","",0);
} else { /* If no parity, */
ttraw
.sg_flags
|= RAW
; /* must use 8-bit raw mode. */ debug(F101
,"ttpkt setting rawmode, parity","",parity
);
} /* End of Xon/Xoff section */
/* Don't echo, don't map CR to CRLF on output, don't fool with case */
ttraw
.sg_flags
&= ~(ECHO
|CRMOD
|LCASE
); ttraw
.sg_flags
&= ~(ECHO
|CRMOD
); ttraw
.sg_flags
&= ~ANYP
; /* Must set this on old Towers */ if (stty(ttyfd
,&ttraw
) < 0) return(-1); /* Set the new modes. */
debug(F100
,"ttpkt stty ok","",0);
x
= xlocal
? km_ext
: km_con
; /* Put line in ASCII mode. */ if (x
!= -1) { /* Make sure we know original modes. */
if (ioctl(ttyfd
,TIOCKSET
, &x
) < 0) {
perror("ttpkt can't set ASCII mode");
debug(F101
,"ttpkt error setting ASCII mode","",x
);
debug(F100
,"ttpkt set ASCII mode ok","",0);
if (xlocal
== 0) /* Turn this off so we can read */
signal(SIGINT
,SIG_IGN
); /* Ctrl-C chars typed at console */
tvtflg
= 0; /* So ttvt() will work next time */#endif /* Not ATTSV or POSIX */
/* AT&T UNIX and POSIX */
if (flow
== FLO_XONX
) /* Xon/Xoff */
ttraw
.c_iflag
|= (IXON
|IXOFF
); else if (flow
== FLO_NONE
) /* None */
/* NOTE: We should also turn off hardware flow control here! */
ttraw
.c_iflag
&= ~(IXON
|IXOFF
); else if (flow
== FLO_KEEP
) { /* Keep */
ttraw
.c_iflag
&= ~(IXON
|IXOFF
); /* Turn off Xon/Xoff flags */ ttraw
.c_iflag
|= (ttold
.c_iflag
& (IXON
|IXOFF
)); /* OR in old ones */ /* NOTE: We should also handle hardware flow control here! */
} else if (flow
== FLO_RTSC
|| /* Hardware */
ttraw
.c_lflag
&= ~(ICANON
|ECHO
); ttraw
.c_lflag
&= ~ISIG
; /* Do NOT check for interrupt chars */ ttraw
.c_lflag
&= ~IEXTEN
; /* Turn off ^O/^V processing */ ttraw
.c_lflag
|= NOFLSH
; /* Don't flush */ ttraw
.c_iflag
|= (BRKINT
|IGNPAR
); ttraw
.c_iflag
&= ~(IGNBRK
|INLCR
|IGNCR
|ICRNL
|INPCK
|ISTRIP
|IXANY
); ttraw
.c_iflag
&= ~(IGNBRK
|INLCR
|IGNCR
|ICRNL
|IUCLC
|INPCK
|ISTRIP
|IXANY
); ttraw
.c_iflag
&= ~(IGNBRK
|INLCR
|IGNCR
|ICRNL
|INPCK
|ISTRIP
); ttraw
.c_cflag
&= ~(CSIZE
|PARENB
); ttraw
.c_cflag
|= (CS8
|CREAD
|HUPCL
); ttraw
.c_cc
[4] = 48; /* So Series/1 doesn't interrupt on every char */#ifndef VEOF /* for DGUX this is VEOF, not VMIN */
ttraw
.c_cc
[4] = 1; /* [VMIN] return max of this many characters or */#ifndef VEOL /* for DGUX this is VEOL, not VTIME */
ttraw
.c_cc
[5] = 0; /* [VTIME] when this many secs/10 expire w/no input */#ifdef VINTR /* Turn off interrupt character */
if (xlocal
== 0) /* so ^C^C can break us out of */
ttraw
.c_cc
[VINTR
] = 0; /* packet mode. */ if (tcsetattr(ttyfd
,TCSADRAIN
,&ttraw
) < 0) return(-1);
if (xlocal
&& (s
> 0)) { /* set speed */
if (ioctl(ttyfd
,TCSETAW
,&ttraw
) < 0) return(-1); /* set new modes . */
#endif /* BSD44ORPOSIX */
/* T T V T -- Condition communication line for use as virtual terminal */
ttvt(long speed
, int flow
)
ttvt(speed
,flow
) long speed
; int flow
;
debug(F101
,"ttvt ttyfd","",ttyfd
);
debug(F101
,"ttvt tvtflg","",tvtflg
);
debug(F101
,"ttvt speed","",speed
);
if (ttyfd
< 0) return(-1); /* Not open. */
tvtflg
= 1; /* Network connections */ return(0); /* require no special setup */
if (tvtflg
!= 0 && speed
== ttspeed
&& flow
== ttflow
&& ttcarr
== curcarr
)
return(0); /* Already been called. */
if (ttfdflg
&& !isatty(ttyfd
)) return(0);
if (xlocal
) { /* For external lines... */
s2
= (int) (speed
/ 10L); s
= ttsspd(s2
); /* Check/set the speed */ carrctl(&tttvt
, flow
!= FLO_DIAL
/* Do carrier control */
&& (ttcarr
== CAR_ON
|| (ttcarr
== CAR_AUT
&& ttmdm
!= 0)));
if (flow
== FLO_RTSC
|| /* Hardware flow control */
if (flow
== FLO_XONX
) { /* No Xon/Xoff flow control */
tttvt
.sg_flags
|= TANDEM
; /* Ask for it. */ } else if (flow
== FLO_KEEP
) {
tttvt
.sg_flags
&= ~TANDEM
; tttvt
.sg_flags
|= (ttold
.sg_flags
& TANDEM
);/* NOTE: We should also handle hardware flow control here! */
} else if (flow
== FLO_NONE
) {
tttvt
.sg_flags
&= ~TANDEM
; /* Don't ask for it. *//* NOTE: We should also turn off hardware flow control here! */
tttvt
.sg_flags
|= RAW
; /* Raw mode in all cases */ tttvt
.sg_flags
&= ~(ECHO
|ANYP
); /* No echo or parity */ tttvt
.sg_flags
&= ~ECHO
; /* No echo */ if (stty(ttyfd
,&tttvt
) < 0) /* Set the new modes */
#else /* It is ATTSV or POSIX */
if (flow
== FLO_RTSC
|| /* Hardware flow control */
else if (flow
== FLO_XONX
) /* Software flow control */
tttvt
.c_iflag
|= (IXON
|IXOFF
); /* On if requested. */ else if (flow
== FLO_KEEP
) {
tttvt
.c_iflag
&= ~(IXON
|IXOFF
); /* Turn off Xon/Xoff flags */ tttvt
.c_iflag
|= (ttold
.c_iflag
& (IXON
|IXOFF
)); /* OR in old ones */ /* NOTE: We should also handle hardware flow control here! */
} else if (flow
== FLO_NONE
) /* Off if NONE or hardware */
tttvt
.c_iflag
&= ~(IXON
|IXOFF
); /* requested. */ tttvt
.c_lflag
&= ~(ISIG
|ICANON
|ECHO
|IEXTEN
); tttvt
.c_iflag
|= (IGNBRK
|IGNPAR
); tttvt
.c_iflag
&= ~(INLCR
|IGNCR
|ICRNL
|BRKINT
|INPCK
|ISTRIP
|IXANY
); tttvt
.c_iflag
&= ~(INLCR
|IGNCR
|ICRNL
|IUCLC
|BRKINT
|INPCK
|ISTRIP
|IXANY
); tttvt
.c_iflag
&= ~(INLCR
|IGNCR
|ICRNL
|BRKINT
|INPCK
|ISTRIP
); tttvt
.c_cflag
&= ~(CSIZE
|PARENB
); tttvt
.c_cflag
|= (CS8
|CREAD
|HUPCL
);#ifndef VEOF /* DGUX termio has VEOF at entry 4, see comment above */
#ifndef VEOL /* DGUX termio has VEOL at entry 5, see comment above */
if (tcsetattr(ttyfd
,TCSADRAIN
,&tttvt
) < 0) return(-1);
if (s
> 0) { /* Set speed */
if (ioctl(ttyfd
,TCSETAW
,&tttvt
) < 0) return(-1); /* set new modes . */
#endif /* BSD44ORPOSIX */
ttspeed
= speed
; /* Done, remember how we were */ ttflow
= flow
; /* called, so we can decide how to */ tvtflg
= 1; /* respond next time. */ debug(F101
,"ttvt done","",tvtflg
);
/* T T S S P D -- Checks and sets transmission rate. */
/* Call with speed in characters (not bits!) per second. */
/* Returns internal speed code if successful, -1 otherwise. */
debug(F101
,"ttsspd","",cps
);
/* First check that the given speed is valid. */
case 11: s
= B110
; break;
case 15: s
= B150
; break;
case 20: s
= B200
; break;
case 30: s
= B300
; break;
case 60: s
= B600
; break;
case 120: s
= B1200
; break;
case 180: s
= B1800
; break;
case 240: s
= B2400
; break;
case 480: s
= B4800
; break;
case 888: s
= B75
; s2
= B1200
; break; /* 888 = 75/1200 split speed */
case 960: s
= B9600
; break;
case 1920: s
= B19200
; break;
case 1920: s
= EXTA
; break;
case 3840: s
= B38400
; break;
case 3840: s
= EXTB
; break;
/* Actually set the speed */
if (ttyfd
> -1 && s
> -1 && xlocal
!= 0) {
if (tcgetattr(ttyfd
,&ttcur
) < 0) return(-1);
if (tcsetattr(ttyfd
,TCSADRAIN
,&ttcur
) < 0) return(-1);
if (cps
== 888) return(-1); /* No split speeds, sorry. */
if (ioctl(ttyfd
,TCGETA
,&ttcur
) < 0) return(-1);
if (ioctl(ttyfd
,TCSETAW
,&ttcur
) < 0) return(-1);
if (gtty(ttyfd
,&ttcur
) < 0) return(-1);
ttcur
.sg_ospeed
= s
; ttcur
.sg_ispeed
= s2
; tttvt
.sg_ospeed
= s
; tttvt
.sg_ispeed
= s2
; ttraw
.sg_ospeed
= s
; ttraw
.sg_ispeed
= s2
; ttold
.sg_ospeed
= s
; ttold
.sg_ispeed
= s2
; if (stty(ttyfd
,&ttcur
) < 0) return(-1);
#endif /* BSD44ORPOSIX */
/* T T G S P D - Get speed of currently selected tty line */
Unreliable. After SET LINE, it returns an actual speed, but not the real
speed. Apparently it always returns the line's nominal speed, from
/etc/ttytab. Even if you SET SPEED to something else, this function might
ttgspd() { /* Get current tty speed */
if (netconn
) return(-1); /* -1 if network connection */
s
= ccold
.c_cflag
& CBAUD
; s
= ccold
.sg_ospeed
; /* (obtained by congm()) */#endif /* BSD44ORPOSIX */
if (tcgetattr(ttyfd
,&ttcur
) < 0) return(-1);
if (ioctl(ttyfd
,TCGETA
,&ttcur
) < 0) return(-1);
s
= ttcur
.c_cflag
& CBAUD
; if (gtty(ttyfd
,&ttcur
) < 0) return(-1);
#endif /* BSD44ORPOSIX */
debug(F101
,"ttgspd ttyfd","",ttyfd
);
debug(F101
,"ttgspd code","",s
);
MINIX defines the Bxx symbols to be bps/100, so B50==B75, B110==B134==B150,
etc, making for many "duplicate case in switch" errors, which are fatal.
case B50
: ss
= 50L; break;
case B75
: ss
= 75L; break;
case B110
: ss
= 110L; break;
case B134
: ss
= 134L; break;
case B150
: ss
= 150L; break;
case B200
: ss
= 200L; break;
case B300
: ss
= 300L; break;
case B600
: ss
= 600L; break;
case B1200
: ss
= 1200L; break;
case B1800
: ss
= 1800L; break;
case B2400
: ss
= 2400L; break;
case B4800
: ss
= 4800L; break;
case B9600
: ss
= 9600L; break;
case B19200
: ss
= 19200L; break;
case EXTA
: ss
= 19200L; break;
case B38400
: ss
= 38400L; break;
case EXTB
: ss
= 38400L; break;
debug(F110
,"speed",temp
,0);
/* ckumyr.c by Kristoffer Eriksson, ske@pkmab.se, 15 Mar 1990. */
#define FIONREAD TIOCQUERY
/* Private buffer for myread() and its companions. Not for use by anything
* else. ttflui() is allowed to reset them to initial values. ttchk() is
* allowed to read my_count.
* my_item is an index into mybuf[]. Increment it *before* reading mybuf[].
* A global parity mask variable could be useful too. We could use it to
* let myread() strip the parity on its own, instead of stripping sign
On X.25 connections, there is an extra control byte at the beginning.
static CHAR x25buf
[MYBUFLEN
+1]; /* Communication device input buffer */
static CHAR
*mybuf
= x25buf
+1;
static CHAR mybuf
[MYBUFLEN
];
static int my_count
= 0; /* Number of chars still in mybuf */
static int my_item
= -1; /* Last index read from mybuf[] */
/* myread() -- Efficient read of one character from communications line.
* Uses a private buffer to minimize the number of expensive read() system
* calls. Essentially performs the equivalent of read() of 1 character, which
* is then returned. By reading all available input from the system buffers
* to the private buffer in one chunk, and then working from this buffer, the
* number of system calls is reduced in any case where more than one character
* arrives during the processing of the previous chunk, for instance high
* baud rates or network type connections where input arrives in packets.
* If the time needed for a read() system call approaches the time for more
* than one character to arrive, then this mechanism automatically compensates
* for that by performing bigger read()s less frequently. If the system load
* is high, the same mechanism compensates for that too.
* myread() is a macro that returns the next character from the buffer. If the
* buffer is empty, mygetbuf() is called. See mygetbuf() for possible error
* This should be efficient enough for any one-character-at-a-time loops.
* For even better efficiency you might use memcpy()/bcopy() or such between
* buffers (since they are often better optimized for copying), but it may not
* be worth it if you have to take an extra pass over the buffer to strip
* parity and check for CTRL-C anyway.
* Note that if you have been using myread() from another program module, you
* may have some trouble accessing this macro version and the private variables
* it uses. In that case, just add a function in this module, that invokes the
#define myread() (--my_count < 0 ? mygetbuf() : 255 & (int)mybuf[++my_item])
/* Specification: Push back up to one character onto myread()'s queue.
* This implementation: Push back characters into mybuf. At least one character
* must have been read through myread() before myunrd() may be used. After
* EOF or read error, again, myunrd() can not be used. Sometimes more than
* one character can be pushed back, but only one character is guaranteed.
* Since a previous myread() must have read its character out of mybuf[],
* that guarantees that there is space for at least one character. If push
* back was really needed after EOF, a small addition could provide that.
* myunrd() is currently not called from anywhere inside kermit...
/* mygetbuf() -- Fill buffer for myread() and return first character.
* This function is what myread() uses when it can't get the next character
* directly from its buffer. First, it calls a system dependent myfillbuf()
* to read at least one new character into the buffer, and then it returns
* the first character just as myread() would have done. This function also
* is responsible for all error conditions that myread() can indicate.
* Returns: When OK => a positive character, 0 or greater.
* When error => -3, error code in errno.
* Older myread()s additionally returned -1 to indicate that there was nothing
* to read, upon which the caller would call myread() again until it got
* something. The new myread()/mygetbuf() always gets something. If it
* doesn't, then make it do so! Any program that actually depends on the old
* The older version also used to return -2 both for EOF and other errors,
* and used to set errno to 9999 on EOF. The errno stuff is gone, EOF and
* other errors now return different results, although Kermit currently never
* checks to see which it was. It just disconnects in both cases.
* Kermit lets the user use the quit key to perform some special commands
* during file transfer. This causes read(), and thus also mygetbuf(), to
* finish without reading anything and return the EINTR error. This should
* be checked by the caller. Mygetbuf() could retry the read() on EINTR,
* but if there is nothing to read, this could delay Kermit's reaction to
* the command, and make Kermit appear unresponsive.
* The debug() call should be removed for optimum performance.
debug(F101
, "myfillbuf read", "", my_count
);
return(my_count
< 0 ? -3 : -2);
return(255 & (int)mybuf
[my_item
= 0]);
* System-dependent read() into mybuf[], as many characters as possible.
* Returns: OK => number of characters read, always more than zero.
* Error => -1, error code in errno.
* If there is input available in the system's buffers, all of it should be
* read into mybuf[] and the function return immediately. If no input is
* available, it should wait for a character to arrive, and return with that
* one in mybuf[] as soon as possible. It may wait somewhat past the first
* character, but be aware that any such delay lengthens the packet turnaround
* time during kermit file transfers. Should never return with zero characters
* unless EOF or irrecoverable read error.
* Correct functioning depends on the correct tty parameters being used.
* Better control of current parameters is required than may have been the
* case in older Kermit releases. For instance, O_NDELAY (or equivalent) can
* no longer be sometimes off and sometimes on like it used to, unless a
* special myfillbuf() is written to handle that. Otherwise the ordinary
* myfillbuf()s may think they have come to EOF.
* If your system has a facility to directly perform the functioning of
* myfillbuf(), then use it. If the system can tell you how many characters
* are available in its buffers, then read that amount (but not less than 1).
* If the system can return a special indication when you try to read without
* anything to read, while allowing you to read all there is when there is
* something, you may loop until there is something to read, but probably that
* is not good for the system load.
/* This is for System III/V with VMIN>0, VTIME=0 and O_NDELAY off,
* and CLOCAL set any way you like. This way, read() will do exactly
* what is required by myfillbuf(): If there is data in the buffers
* of the O.S., all available data is read into mybuf, up to the size
* of mybuf. If there is none, the first character to arrive is
/* From S. Dezawa at Fujifilm in Japan. I don't know why this is */
/* necessary for the sxa E50, but it is. */
return read(ttyfd
, mybuf
, 255);
/* sizeof(mybuf) should be MYBUFL == 256 */
return read(ttyfd
, mybuf
, sizeof(mybuf
));
#else /* not AT&T or POSIX */
/* This is quoted from the old myread(). The semantics seem to be
* alright, but maybe errno would not need to be set even when
* there is no error? I don't know aegis.
count
= ios_$
get((short)ttyfd
, ios_$cond_opt
, mybuf
, 256L, st
); if (st
.all
== ios_$get_conditional_failed
) /* get at least one */
inbufc
= ios_$
get((short)ttyfd
, 0, mybuf
, 1L, st
); if (st
.all
== ios_$end_of_file
)
else if (st
.all
!= status_$ok
) {
/* This is for systems with FIONREAD. FIONREAD returns the number
* of characters available for reading. If none are available, wait
* until something arrives, otherwise return all there is.
SunLink X.25 support in this routine from Stefaan A. Eeckels, Eurostat (CEC).
Depends on SunOS having FIONREAD, not because we use it, but just so this
code is grouped correctly within the #ifdefs. Let's hope Solaris keeps it.
We call x25xin() instead of read() so that Q-Bit packets, which contain
X.25 service-level information (e.g. PAD parameter changes), can be processed
transparently to the upper-level code. This is a blocking read, and so
we depend on higher-level code (such as ttinc()) to set any necessary alarms.
if (netconn
&& nettype
== NET_SX25
) {
while ((x
= x25xin(sizeof(x25buf
), x25buf
)) < 1) ;
return(x
- 1); /* "-1" compensates for extra status byte */
x
= ioctl(ttyfd
, FIONREAD
, &avail
); debug(F101
,"myfillbuf FIONREAD","",x
);
debug(F101
,"myfillbuf errno","",errno
);
return(read(ttyfd
, mybuf
, (int) avail
));
/* Add other systems here, between #ifdef and #else, e.g. NETCONN. */
/* When there is no other possibility, read 1 character at a time. */
return read(ttyfd
, mybuf
, 1);
/* T T F L U I -- Flush tty input buffer */
Flush internal MYREAD buffer *FIRST*, in all cases.
my_count
= 0; /* Reset count to zero */ my_item
= -1; /* And buffer index to -1 */ Network flush is done specially, in the network support module.
if (netconn
) return(netflui());
debug(F101
,"ttflui ttyfd","",ttyfd
);
if (ttyfd
< 0) return(-1);
sio_$
control((short)ttyfd
, sio_$flush_in
, true, st
); if (st
.all
!= status_$ok
) {
fprintf(stderr
, "flush failed: "); error_$
print(st
);
} else { /* sometimes the flush doesn't work */
/* eat all the characters that shouldn't be available */
ios_$
get((short)ttyfd
, ios_$cond_opt
, buf
, 256L, st
); /* (void) */ if (st
.all
== ios_$get_conditional_failed
) break;
fprintf(stderr
, "flush failed(2): "); error_$
print(st
);
#ifdef BSD44 /* 4.4 BSD */
n
= FREAD
; /* Specify read queue */ debug(F101
,"ttflui BSD44 flush","",ttyfd
);
ioctl(ttyfd
,TIOCFLUSH
,&n
);
ioctl(ttyfd
,TCSAFLUSH
,&n
);
#ifdef ATTSV /* System V */
#else /* Not BSD44, POSIX, or Sys V */
#ifdef TIOCFLUSH /* Those with TIOCFLUSH defined */
#ifdef ANYBSD /* Berkeley */
n
= FREAD
; /* Specify read queue */ debug(F101
,"ttflui anybsd flush","",ttyfd
);
ioctl(ttyfd
,TIOCFLUSH
,&n
);
#else /* Others (V7, etc) */
ioctl(ttyfd
,TIOCFLUSH
,0);
#else /* All others... */
No system call (that we know about) for input buffer flushing.
So see how many there are and read them in a loop, using ttinc().
ttinc() is buffered, so we're not getting charged with a system call
per character, just a function call.
debug(F101
,"ttflui reading","",n
);
while ((n
--) && ttinc(0) > 1) ;
ttfluo() { /* Flush output buffer */
return(tcflush(ttyfd
,TCOFLUSH
));
return(0); /* (dummy for now) */
/* Interrupt Functions */
/* Set up terminal interrupts on console terminal */
esctrp(foo
) int foo
; { /* trap console escapes (^\) */
signal(SIGQUIT
,SIG_IGN
); /* ignore until trapped */
debug(F101
,"esctrp caught SIGQUIT","",conesc
);
esctrp(foo
) int foo
; { /* trap console escapes (^\) */
signal(SIGQUIT
,SIG_IGN
); /* ignore until trapped */
debug(F101
,"esctrp caught SIGQUIT","",conesc
);
esctrp(foo
) int foo
; { /* trap console escapes (^\) */
signal(SIGQUIT
,SIG_IGN
); /* ignore until trapped */
/* C O N B G T -- Background Test */
static int jc
= 0; /* 0 = no job control */
Call with flag == 1 to prevent signal test, which can not be expected
to work during file transfer, when SIGINT probably *is* set to SIG_IGN.
Call with flag == 0 to use the signal test, but only if the process-group
test fails, as it does on some UNIX systems, where getpgrp() is buggy,
requires an argument when the man page says it doesn't, or vice versa.
If flag == 0 and the process-group test fails, then we determine background
status simply (but not necessarily reliably) from isatty().
conbgt() sets the global backgrd = 1 if we appear to be in the background,
and to 0 if we seem to be in the foreground. conbgt() is highly prone to
int x
= -1, /* process group or SIGINT test */
y
= 0; /* isatty() test */ Check for background operation, even if not running on real tty, so that
background flag can be set correctly. If background status is detected,
then Kermit will not issue its interactive prompt or most messages.
If your prompt goes away, you can blame (and fix?) this function.
/* Use process-group test if possible. */
#ifdef POSIX /* We can do it in POSIX */
#ifdef BSD4 /* and in BSD 4.x. */
#ifdef HPUXJOBCTL /* and in most HP-UX's */
#ifdef TIOCGPGRP /* and anyplace that has this ioctl. */
#ifdef MIPS /* Except if it doesn't work... */
Semi-reliable process-group test. Check whether this process's group is
the same as the controlling terminal's process group. This works if the
getpgrp() call doesn't lie (as it does in the SUNOS System V environment).
PID_T mypgrp
= (PID_T
)0; /* Kermit's process group */ PID_T ctpgrp
= (PID_T
)0; /* The terminal's process group */ The getpgrp() prototype is obtained from system header files for POSIX
and Sys V R4 compilations. Other systems, who knows. Some complain about
a duplicate declaration here, others don't, so it's safer to leave it in
if we don't know for certain.
#endif /* _POSIX_SOURCE */
/* Get my process group. */
#ifdef SVR3 /* Maybe this should be ATTSV? */
/* This function is not described in SVID R2 */
debug(F101
,"ATTSV conbgt process group","",(int) mypgrp
);
debug(F101
,"POSIX conbgt process group","",(int) mypgrp
);
debug(F101
,"BSD conbgt process group","",(int) mypgrp
);
/* Now get controlling tty's process group */
ctpgrp
= tcgetpgrp(1); /* The POSIX way */ debug(F101
,"POSIX conbgt terminal process group","",(int) ctpgrp
);
ioctl(1, TIOCGPGRP
, &ctpgrp
); /* Or the BSD way */
debug(F101
,"non-POSIX conbgt terminal process group","",(int) ctpgrp
);
#endif /* BSD44ORPOSIX */
if ((mypgrp
> (PID_T
) 0) && (ctpgrp
> (PID_T
) 0))
x
= (mypgrp
== ctpgrp
) ? 0 : 1; /* If they differ, then background. */ else x
= -1; /* If error, remember. */
debug(F101
,"conbgt process group test","",x
);
/* Try to see if job control is available */
#ifdef NOJC /* User override */
jc
= 0; /* No job control allowed */ debug(F111
,"NOJC","jc",jc
);
#ifdef SVR4ORPOSIX /* POSIX actually tells us */
debug(F100
,"SVR4ORPOSIX jc test...","",0);
jc
= sysconf(_SC_JOB_CONTROL
); /* Whatever system says */ debug(F111
,"sysconf(_SC_JOB_CONTROL)","jc",jc
);
#ifdef _POSIX_JOB_CONTROL
jc
= 1; /* By definition */ debug(F111
,"_POSIX_JOB_CONTROL is defined","jc",jc
);
jc
= 0; /* Assume job control not allowed */ debug(F111
,"SVR4ORPOSIX _SC/POSIX_JOB_CONTROL not defined","jc",jc
);
#endif /* _POSIX_JOB_CONTROL */
#endif /* _SC_JOB_CONTROL */
jc
= 1; /* Job control allowed */ debug(F111
,"BSD job control","jc",jc
);
debug(F111
,"SVR3 job control","jc",jc
);
jc
= 0; /* JC not allowed */ debug(F111
,"job control catch-all","jc",jc
);
debug(F101
,"conbgt jc","",jc
);
Test if SIGINT (terminal interrupt) is set to SIG_IGN (ignore),
which is done by the shell (sh) if the program is started with '&'.
Unfortunately, this is NOT done by csh or ksh so watch out!
Note, it's safe to set SIGINT to SIG_IGN here, because further down
we always set it to something else.
if (x
< 0 && !flag
) { /* Didn't get good results above... */
osigint
= signal(SIGINT
,SIG_IGN
); /* What is SIGINT set to? */ x
= (osigint
== SIG_IGN
) ? 1 : 0; /* SIG_IGN? */ debug(F101
,"conbgt osigint","",(int) osigint
);
debug(F101
,"conbgt signal test","",x
);
/* Also check to see if we're running with redirected stdio. */
/* This is not really background operation, but we want to act as though */
y
= (isatty(0) && isatty(1)) ? 1 : 0; debug(F101
,"conbgt isatty test","",y
);
/* The process group and/or signal test doesn't work under these... */
backgrd
= (x
|| !y
) ? 1 : 0; debug(F101
,"conbgt backgrd","",backgrd
);
/* C O N I N T -- Console Interrupt setter */
First arg is pointer to function to handle SIGTERM & SIGINT (like Ctrl-C).
Second arg is pointer to function to handle SIGTSTP (suspend).
VOID
/* Set terminal interrupt traps. */conint(f
,s
) SIGTYP (*f
)(), (*s
)();
conint(SIGTYP (*f
)(int), SIGTYP (*s
)(int))
conint(f
,s
) SIGTYP (*f
)(), (*s
)();
conbgt(0); /* Do background test. */
/* Set the desired handlers for hangup and software termination. */
signal(SIGTERM
,f
); /* Software termination */
Prior to edit 184, we used to trap SIGHUP here. That is clearly wrong;
on some systems, it would leave the user's process on the terminal after
the phone hung up. But the trap was here for a reason: most likely some
UNIX systems (init, getty, or login) fail to properly restore the terminal
modes after regaining control of a hung-up-upon login terminal. Therefore
removing this trap is likely to cause problems too. A more sensible
approach would be to use a special handler for HANGUP, which would restore
the terminal modes and then exit(). But that could leave zombie processes
around (like the lower CONNECT fork, or any fork started by zxcmd()), but
there is probably no clean, portable, reliable way for Kermit to kill all
its forks. So we just exit() and hope that UNIX fixes the terminal modes
before the next person tries to log in.
signal(SIGHUP
,f
); /* Hangup */
/* Now handle keyboard stop, quit, and interrupt signals. */
/* Check if invoked in background -- if so signals set to be ignored. */
/* However, if running under a job control shell, don't ignore them. */
/* We won't be getting any, as we aren't in the terminal's process group. */
debug(F101
,"conint backgrd","",backgrd
);
debug(F101
,"conint jc","",jc
);
if (backgrd
&& !jc
) { /* In background, ignore signals */
debug(F101
,"conint background ignoring signals, jc","",jc
);
signal(SIGTSTP
,SIG_IGN
); /* Keyboard stop */
signal(SIGQUIT
,SIG_IGN
); /* Keyboard quit */
signal(SIGINT
,SIG_IGN
); /* Keyboard interrupt */
} else { /* Else in foreground or suspended */
debug(F101
,"conint foreground catching signals, jc","",jc
);
signal(SIGINT
,f
); /* Catch terminal interrupt */
#ifdef SIGTSTP /* Keyboard stop (suspend) */
debug(F101
,"conint SIGSTSTP","",(int) s
);
if (s
== NULL
) s
= SIG_DFL
;
#ifdef NOJC /* No job control allowed. */
#else /* Job control allowed */
if (jc
) /* if available. */
signal(SIGQUIT
,esctrp
); /* Quit signal, Sys III/V. */
if (conesc
) conesc
= 0; /* Clear out pending escapes */
signal(SIGQUIT
,esctrp
); /* V7 like Sys III/V */
signal(SIGQUIT
,f
); /* Apollo, catch it like others. */
signal(SIGQUIT
,SIG_IGN
); /* Others, ignore like 4D & earlier. */
/* C O N N O I -- Reset console terminal interrupts */
SIGTYP
/* Dummy function to ignore signals *//* sig_IGN */ { /* Just like the real one, but has */
} /* different address. */
connoi() { /* Console-no-interrupts */
debug(F100
,"connoi","",0);
/* Note the locally defined replacement for SIG_IGN that is used here */
/* for the SIGINT setting. This is done so that the Sys V background */
/* test -- (signal(SIGINT,SIG_IGN) == SIG_IGN) -- can work. If we use */
/* the real SIG_IGN here, then conint will always decide that this */
/* program is running in the background! */
signal(SIGINT
,sig_ign
); /* <--- note! */
/* I N I T R A W Q -- Set up to read /dev/kmem for character count. */
Used in Version 7 to simulate Berkeley's FIONREAD ioctl call. This
eliminates blocking on a read, because we can read /dev/kmem to get the
number of characters available for raw input. If your system can't
or you won't let the world read /dev/kmem then you must figure out a
different way to do the counting of characters available, or else replace
this by a dummy function that always returns 0.
* Call this routine as: initrawq(tty)
* where tty is the file descriptor of a terminal. It will return
* (as a char *) the kernel-mode memory address of the rawq character
* count, which may then be read. It has the side-effect of flushing
* John Mackin, Physiology Dept., University of Sydney (Australia)
* ...!decvax!mulga!physiol.su.oz!john
* Permission is hereby granted to do anything with this code, as
* long as this comment is retained unmodified and no commercial
static struct nlist nl
[] = {
NPTYPE xproc
; /* Its type is defined in makefile. */ if ((m
= open("/dev/kmem", 0)) < 0) err("kmem");
if (nl
[0].n_type
== 0) err("proc array");
if (nl
[1].n_type
== 0) err("nproc");
lseek(m
, (long)(nl
[1].n_value
), 0);
read (m
, &xproc
, sizeof(xproc
));
saval
= signal(SIGALRM
, catch); if ((pid
= fork()) == 0) {
signal(SIGALRM
, SIG_DFL
);
pp
= (struct proc
*) nl
[0].n_value
; if (lseek(m
, (long)(nl
[0].n_value
), 0) < 0L) err("seek");
if (read(m
, &pp
, sizeof(pp
)) != sizeof(pp
)) err("no read of proc ptr");
lseek(m
, (long)(nl
[1].n_value
), 0);
read(m
, &xproc
, sizeof(xproc
));
if (lseek(m
, (long)pp
, 0) < 0L) err("Can't seek to proc");
if ((p
= malloc(xproc
* sizeof(struct proc
))) == NULL
) err("malloc");
if (read(m
,p
,xproc
* sizeof(struct proc
)) != xproc
*sizeof(struct proc
))
for (pp
= (struct proc
*)p
; xproc
> 0; --xproc
, ++pp
) {
if (pp
-> p_pid
== (short) pid
) goto iout
;
qaddr
= (char *)(pp
-> p_wchan
); wait((WAIT_T
)0); /* Destroy the ZOMBIEs! */
/* More V7-support functions... */
sprintf(buf
, "fatal error in initrawq: %s", s
);
/* G E N B R K -- Simulate a modem break. */
genbrk(fn
,msec
) int fn
, msec
; {
ret
= ioctl(fn
, TIOCGETP
, &ttbuf
); sospeed
= ttbuf
.sg_ospeed
; ttbuf
.sg_ospeed
= BSPEED
; ret
= ioctl(fn
, TIOCSETP
, &ttbuf
); x
= ( BSPEED
* 100 ) / msec
; ret
= write(fn
, brnuls
, (( BSPEED
* 100 ) / msec
)); ttbuf
.sg_ospeed
= sospeed
; ret
= ioctl(fn
, TIOCSETP
, &ttbuf
);/* T T C H K -- Tell how many characters are waiting in tty input buffer */
/* Some callers of this want to know whether there is something to read
* either in the system buffers or in our private buffers (and mostly don't
* care how many characters, just whether it's more than zero or not), while
* some others would be better off with the number of characters in our
* Some systems can say how many characters there are in the system buffers.
* Others can not. For those that can't, the number in the private buffers
* will have to do (or should we put the tty into O_NDELAY-mode and try to
* read one character?). If the system can tell whether there is zero or
* more than zero characters, we can return 1 in the latter case even if the
* private buffer is empty. (That is good for sliding windows.)
This was REALLY slowing TELNET connections down! Just do the regular
ttyfd-based stuff here. Let the VMS version call nettchk if it has to...
FIONREAD definitely works for TELNET, at least on the NeXT and SUNOS.
if (netconn
) return(nettchk());
x
= ioctl(ttyfd
, FIONREAD
, &n
); /* Berkeley and maybe some others */ debug(F101
,"ttchk FIONREAD return code","",x
);
debug(F101
,"ttchk FIONREAD count","",n
);
lseek(kmem
[TTY
], (long) qaddr
[TTY
], 0); /* 7th Edition Unix */
x
= read(kmem
[TTY
], &n
, sizeof(int)); if (x
!= sizeof(int)) n
= 0;
x
= ioctl(ttyfd
, TIOCQCNT
, &ttbuf
); /* Pro/3xx Venix V.1 */ n
= ttbuf
.sg_ispeed
& 0377; Last resort for systems without FIONREAD or equivalent, but with
something like rdchk(), like XENIX.
if (my_count
== 0 && rdchk(ttyfd
) > 0) n
= 1;
debug(F101
,"ttchk rdchk","",n
);
For myread() users, add the contents of myread()'s private buffer.
Sometimes, this is all there is to construct a result of ttchk() on.
debug(F101
,"ttchk returns","",n
);
/* T T X I N -- Get n characters from tty input buffer */
/* Returns number of characters actually gotten, or -1 on failure */
/* Intended for use only when it is known that n characters are actually */
/* Available in the input buffer. */
ttxin(n
,buf
) int n
; CHAR
*buf
; {
debug(F101
,"ttxin n","",n
);
ttpmsk
= (ttprty
) ? 0177 : 0377; /* Parity stripping mask. */ if (netconn
&& (ttnet
== NET_SX25
)) /* X.25 connection */
debug(F101
,"ttxin MYREAD","",0);
for( x
= 0; (x
> -1) && (x
< n
) && (c
= myread()) >= 0; )
debug(F101
,"ttxin myread returns","",c
);
for (c
= 0; c
< n
; c
++) buf
[c
] &= ttpmsk
;
if (x
> 0) buf
[x
] = '\0';
/* T T O L -- Write string s, length n, to communication device. */
>= 0 on success, number of characters actually written.
ttol(s
,n
) int n
; CHAR
*s
; {
if (ttyfd
< 0) return(-1); /* Not open? */
debug(F101
,"ttol n","",n
);
tries
= TTOLMAXT
; /* Allow up to this many tries */ len
= n
; /* Remember original length */ while (n
> 0 && tries
-- > 0) { /* Be persistent */
debug(F101
,"ttol try","",TTOLMAXT
- tries
);
x
= write(ttyfd
,s
,n
); /* Write string to device */ if (x
== n
) { /* Worked? */
debug(F101
,"ttol ok","",x
); /* OK */
} else if (x
< 0) { /* No, got error? */
debug(F101
,"ttol failed","",errno
);
} else { /* No error, so partial success */
debug(F101
,"ttol partial","",x
);
s
+= x
; /* Point to part not written yet */ n
-= x
; /* Adjust length */ if (x
> 0) msleep(100); /* Wait 100 msec */
} /* Go back and try again */
return(n
< 1 ? len
: -1); /* Too many tries */
/* T T O C -- Output a character to the communication line */
This function should only be used for interactive, character-mode operations,
like terminal connection, script execution, dialer i/o, where the overhead
of the signals and alarms does not create a bottleneck.
#define TTOC_TMO 15 /* Timeout in case we get stuck */
/* debug(F101,"ttoc","",(CHAR) c); */
if (ttyfd
< 0) return(-1); /* Check for not open. */
saval
= signal(SIGALRM
,timerh
); /* Enable timer interrupt */ xx
= alarm(TTOC_TMO
); /* for this many seconds. */ if (xx
< 0) xx
= 0; /* Save old alarm value. */
/* debug(F101,"ttoc alarm","",xx); */
if (setjmp(sjbuf
)) { /* Timer went off? */
ttimoff(); /* Yes, cancel this alarm. */
if (xx
- TTOC_TMO
> 0) alarm(xx
- TTOC_TMO
); /* Restore previous one */
/* debug(F100,"ttoc timeout","",0); */
debug(F101
,"ttoc timeout","",c
);
if (ttflow
== FLO_XONX
) {
debug(F101
,"ttoc flow","",ttflow
); /* Maybe we're xoff'd */
y
= tcflow(ttyfd
,TCOON
); /* POSIX way to unstick. */ debug(F100
,"ttoc tcflow","",y
);
#ifdef BSD4 /* Berkeley way to do it. */
/* .... Used to be "ioctl(ttyfd, TIOCSTART, 0);". Who knows? */
y
= ioctl(ttyfd
, TIOCSTART
, &x
); debug(F101
,"ttoc TIOCSTART","",y
);
/* Is there a Sys V way to do this? */
return(-1); /* Return failure code. */
if (write(ttyfd
,&c
,1) < 1) { /* Try to write the character. */
ttimoff(); /* Failed, turn off the alarm. */
alarm(xx
); /* Restore previous alarm. */
debug(F101
,"ttoc error","",errno
); /* Log the error, */
return(-1); /* and return the error code. */
ttimoff(); /* Success, turn off the alarm. */
alarm(xx
); /* Restore previous alarm. */
return(0); /* Return good code. */
/* T T I N L -- Read a record (up to break character) from comm line. */
Reads up to "max" characters from the communication line, terminating on:
(a) the packet length field if the "turn" argument is zero, or
(b) on the packet-end character (eol) if the "turn" argument is nonzero
(c) two Ctrl-C's in a row
and returns the number of characters read upon success, or if "max" was
exceeded or the timeout interval expired before (a) or (b), returns -1.
The characters that were input are copied into "dest" with their parity bits
stripped if parity was selected. Returns the number of characters read.
Characters after the eol are available upon the next call to this function.
The idea is to minimize the number of system calls per packet, and also to
minimize timeouts. This function is the inner loop of the program and must
be as efficient as possible. The current strategy is to use myread().
WARNING: this function calls parchk(), which is defined in another module.
Normally, ckutio.c does not depend on code from any other module, but there
is an exception in this case because all the other ck?tio.c modules also
need to call parchk(), so it's better to have it defined in a common place.
Since this function has grown to have its fingers so deeply into the
protocol, it is slated for removal: rpack() will take care of everything.
We have four different declarations here because:
(a) to allow Kermit to be built without the automatic parity sensing feature
(b) one of each type for ANSI C, one for non-ANSI.
ttinl(CHAR
*dest
, int max
,int timo
, CHAR eol
, CHAR start
, int turn
)
ttinl(dest
,max
,timo
,eol
,start
,turn
) int max
,timo
,turn
; CHAR
*dest
, eol
, start
;
ttinl(CHAR
*dest
, int max
,int timo
, CHAR eol
)
ttinl(dest
,max
,timo
,eol
) int max
,timo
; CHAR
*dest
, eol
;
if (ttyfd
< 0) return(-1); /* Not open. */
debug(F101
,"ttinl max","",max
);
debug(F101
,"ttinl timo","",timo
);
*dest
= '\0'; /* Clear destination buffer */
if (timo
< 0) timo
= 0; /* Safety */
if (timo
) { /* Don't time out if timo == 0 */
saval
= signal(SIGALRM
,timerh
); /* Enable timer interrupt */ xx
= alarm(timo
); /* Set it. */ debug(F101
,"ttinl alarm","",xx
);
if (setjmp(sjbuf
)) { /* Timer went off? */
debug(F100
,"ttinl timout","",0); /* Get here on timeout. */
/* debug(F110," with",(char *) dest,0); */
ttimoff(); /* Turn off timer */
return(-1); /* and return error code. */
register int i
, m
, n
; /* local variables */
debug(F000
,"ttinl start","",start
);
flag
= 0; /* Start of packet flag */ ttpmsk
= m
= (ttprty
) ? 0177 : 0377; /* Set parity stripping mask. */ if (netconn
&& (ttnet
== NET_SX25
))
return(x25inl(dest
,max
,timo
,eol
,start
));
return(x25inl(dest
,max
,timo
,eol
));
/* Now read into destination, stripping parity and looking for the */
/* the packet terminator, and also for two Ctrl-C's typed in a row. */
i
= 0; /* Destination index */ debug(F101
,"ttinl eol","",eol
);
/* debug(F101,"ttinl i","",i); */
if ((n
= myread()) < 0) {
debug(F101
,"ttinl myread failure, n","",n
);
debug(F101
,"ttinl myread errno,","",errno
);
/* Don't let EINTR break packets. */
if (n
== -3 && errno
== EINTR
&& i
> 0) {
debug(F101
,"ttinl myread i","",i
);
while ((i
< max
-1) && (n
= read(ttyfd
, &ch
, 1)) > 0) {
/* debug(F101,"ttinl char","", (n & ttpmsk)); */
Figure out what the length is supposed to be in case the packet
has no terminator (as with Honeywell GCOS-8 Kermit).
#define xunchar(ch) (((ch) - 32 ) & 0xFF ) /* Character to number */
if ((flag
== 0) && ((n
& 0x7f) == start
)) flag
= 1;
if (flag
) dest
[i
++] = n
& ttpmsk
;
If we have not been instructed to wait for a turnaround character, we
can go by the packet length field. If turn != 0, we must wait for the
end of line (eol) character before returning.
pktlen
= xunchar(dest
[1]); debug(F101
,"ttinl length","",pktlen
);
} else if (i
== 5 && pktlen
== 0) {
lplen
= xunchar(dest
[4]); } else if (i
== 6 && pktlen
== 0) {
pktlen
= lplen
* 95 + xunchar(dest
[5]) + 5; debug(F101
,"ttinl length","",pktlen
);
if ((n
& 0x7f) == CTRLC
) { /* Check for ^C^C */
if (++ccn
> 1) { /* If we got 2 in a row, bail out. */
if (timo
) { /* Clear timer. */
fprintf(stderr
,"^C...\r\n"); /* Echo Ctrl-C */
} else ccn
= 0; /* Not ^C, so reset ^C counter, */
debug(F101
,"ttinl skipping","",n
);
/* Check for end of packet */
|| (!turn
&& havelen
&& (i
> pktlen
+1))
debug(F101
,"ttinl got eol","",eol
);
dest
[i
] = '\0'; /* Yes, terminate the string, */ /* debug(F101,"ttinl i","",i); */
debug(F101
,"ttinl EOP length","",pktlen
);
debug(F101
,"ttinl i","",i
);
} else debug(F101
,"ttinl got eol","",eol
);
dest
[i
] = '\0'; /* Terminate the string, */ /* Parity checked yet? */
if (ttpflg
++ == 0 && ttprty
== 0) {
if ((ttprty
= parchk(dest
,start
,i
)) > 0) { /* No, check. */
debug(F101
,"ttinl senses parity","",ttprty
);
debug(F110
,"ttinl packet before",dest
,0);
dest
[j
] &= 0x7f; /* Strip parity from packet */ debug(F110
,"ttinl packet after ",dest
,0);
} else ttprty
= 0; /* restore if parchk error */
if (timo
) { /* Turn off timer. */
debug(F111
,"ttinl got", dest
,i
);
/* T T I N C -- Read a character from the communication line */
On success, returns the character that was read, >= 0.
On failure, returns -1 or other negative myread error code.
if (ttyfd
< 0) return(-1); /* Not open. */
if (timo
<= 0) { /* Untimed. */
/* comm line failure returns -1 thru myread, so no &= 0377 */
n
= myread(); /* Wait for a character... */ /* debug(F101,"ttinc MYREAD n","",n); */
return(n
< 0 ? n
: n
& ttpmsk
);
while ((n
= read(ttyfd
,&ch
,1)) == 0) /* Wait for a character. */
/* Shouldn't have to loop in ver 5A. */
if (netconn
) { /* Special handling for net */
netclos(); /* If read() returns 0 it means */
netconn
= 0; /* the connection has dropped. */ /* debug(F000,"ttinc","",ch); */
return( (n
< 1) ? -3 : (ch
& ttpmsk
) );
} else { /* Timed read */
saval
= signal(SIGALRM
,timerh
); /* Set up handler, save old one. */ xx
= alarm(timo
); /* Set alarm, save old one. */ /* debug(F101,"ttinc alarm","",xx); */
if (setjmp(sjbuf
)) { /* Timer expired */
n
= myread(); /* If managing own buffer... */ /* debug(F101,"ttinc myread","",n); */
n
= read(ttyfd
,&ch
,1); /* Otherwise call the system. */ /* debug(F101,"ttinc read","",n); */
n
= (n
< 0) ? -3 : -2; /* Special return codes. */ ttimoff(); /* Turn off the timer */
if (n
== -1) xx
-= timo
; /* and restore any previous alarm */
if (xx
< 0) xx
= 0; /* adjusted by timeout interval */
alarm(xx
); /* if timer expired. */
/* #endif */ /* COMMENT */
if (n
== -2) { /* read() returns 0 */
netclos(); /* on network read failure */
return( (n
< 0) ? n
: (n
& ttpmsk
) ); /* Return masked char or neg. */
/* S N D B R K -- Send a BREAK signal of the given duration */
sndbrk(int msec
) { /* Argument is milliseconds */
debug(F101
,"ttsndb ttyfd","",ttyfd
);
if (ttyfd
< 0) return(-1); /* Not open. */
if (netconn
) /* Send network BREAK */
if (msec
< 1 || msec
> 5000) return(-1); /* Bad argument */
#ifdef POSIX /* Easy in POSIX */
return(tcsendbreak(ttyfd
,msec
/ 375));
gtty(ttyfd
,&ttbuf
); /* Get current tty flags */
spd
= ttbuf
.sg_ospeed
; /* Save speed */ ttbuf
.sg_ospeed
= B50
; /* Change to 50 baud */ stty(ttyfd
,&ttbuf
); /* ... */
n
= (int)strlen(brnuls
); /* Send the right number of nulls */ ttbuf
.sg_ospeed
= spd
; /* Restore speed */ stty(ttyfd
,&ttbuf
); /* ... */
sio_$
control((short)ttyfd
, sio_$send_break
, msec
, st
); n
= FWRITE
; /* Flush output queue. *//* Watch out for int vs long problems in &n arg! */
ioctl(ttyfd
,TIOCFLUSH
,&n
); /* Ignore any errors.. */
if (ioctl(ttyfd
,TIOCSBRK
,(char *)0) < 0) { /* Turn on BREAK */
perror("Can't send BREAK");
x
= msleep(msec
); /* Sleep for so many milliseconds */ if (ioctl(ttyfd
,TIOCCBRK
,(char *)0) < 0) { /* Turn off BREAK */
perror("BREAK stuck!!!");
doexit(BAD_EXIT
,-1); /* Get out, closing the line. */
/* with bad exit status */
No way to send a long BREAK in Sys V, so send a bunch of regular ones.
(Actually, Sys V R4 is *supposed* to have the POSIX tcsendbreak() function,
but there's no way for this code to know for sure.)
for (n
= 0; n
< x
; n
++) {
if (ioctl(ttyfd
,TCSBRK
,(char *)0) < 0) {
perror("Can't send BREAK");
return(genbrk(ttyfd
,250)); /* Simulate a BREAK */
/* T T S N D B -- Send a BREAK signal */
/* T T S N D L B -- Send a Long BREAK signal */
/* M S L E E P -- Millisecond version of sleep(). */
Call with number of milliseconds (thousandths of seconds) to sleep.
Intended only for small intervals. For big ones, just use sleep().
Returns 0 always, even if it didn't work.
/* Define MSLFTIME for systems that must use an ftime() loop. */
#ifdef ANYBSD /* For pre-4.2 BSD versions */
#ifdef TOWER1 /* NCR Tower OS 1.0 */
#ifdef COHERENT /* Coherent */
#ifdef SUNOS4 /* Systems that have usleep() */
#ifdef AIXRS /* RS/6000 can do select() */
/* BSD 4.2 & above can do it with select()... */
if (m
>= 1000) { /* Catch big arguments. */
if (gettimeofday(&tv
, &tz
) < 0) return(-1); /* Get current time. */
t1
= tv
.tv_sec
; /* Seconds */ tv
.tv_sec
= 0; /* Use select() */ select( 0, (fd_set
*)0, (fd_set
*)0, (fd_set
*)0, &tv
);
select( 0, (fd_set
*)0, (fd_set
*)0, (fd_set
*)0, &tv
);
select( 0, (int *)0, (int *)0, (int *)0, &tv
);
"This routine is implemented using setitimer(2); it requires eight
system calls...". In other words, it might take 5 minutes to sleep
if (m
>= 1000) { /* Catch big arguments. */
usleep((unsigned int)(m
* 1000));
dur
.c2
.low32
= 250 * m
; /* one millisecond = 250 four microsecond ticks */ time_$
wait(time_$relative
, dur
, st
); sleep(-((m
* 60 + 500) / 1000));
extern long times(); /* Or #include <times.h> ? */
/* This better be picked up in ckcdeb.h... */
if (cp
&& (hertz
= atoi(cp
))) {
CLOCK_TICK
= 1000 / hertz
; } else { /* probably single user mode */
/* HZ always exists in, for instance, SCO Xenix, so you don't have to
* make special #ifdefs for XENIX here, like in ver 4F. Also, if you
* have Xenix, you have should have nap(), so the best is to use -DNAP
* in the makefile. Most systems have HZ.
CLOCK_TICK
= 17; /* 1/60 sec */ printf("warning: environment variable HZ bad... using HZ=%d\r\n",
if (m
>= 1000) { /* Catch big arguments. */
if ((t1
= times(tarray
)) < 0) return(-1);
if ((t2
= times(tarray
)) < 0) return(-1);
t3
= ((int)(t2
- t1
)) * CLOCK_TICK
;#ifdef MSLFTIME /* Use ftime() loop... */
if (m
>= 1000) { /* Catch big arguments. */
if (ftime(&ftp
) < 0) return(-1); /* Get base time. */
t1
= ((ftp
.time
& 0xff) * 1000) + ftp
.millitm
; ftime(&ftp
); /* Get current time and compare. */
t3
= (((ftp
.time
& 0xff) * 1000) + ftp
.millitm
) - t1
;/* This includes true POSIX, which has no way to do this. */
if (m
>= 1000) { /* Catch big arguments. */
if (m
> 0) while (m
> 0) m
--; /* Just a dumb busy loop */
/* R T I M E R -- Reset elapsed time counter */
tcount
= time( (time_t *) 0 );/* G T I M E R -- Get current value of elapsed time counter in seconds */
x
= (int) (time( (time_t *) 0 ) - tcount
); debug(F101
,"gtimer","",x
);
return( (x
< 0) ? 0 : x
);
/* Z T I M E -- Return date/time string */
#undef ZTIMEV7 /* Which systems need to use */
#ifdef COHERENT /* old UNIX Version 7 way... */
#ifdef ATTSV /* AT&T way */
/* extern long time(); */ /* Theoretically these should */
char *ctime(); /* already been dcl'd in <time.h> */
clock_storage
= time( (long *) 0 ); *s
= ctime( &clock_storage
);
#ifdef PROVX1 /* Venix 1.0 way */
#ifdef BSD42 /* 4.2BSD way */
tp
= localtime(&tv
.tv_sec
);#ifdef MINIX /* MINIX way */
extern long time(); /* Already got these from <time.h> */
#ifdef ZTIMEV7 /* The regular way */
#else /* Catch-all for others... */
*s
= "Ddd Mmm 00 00:00:00 0000\n" /* Return dummy in asctime() format */
/* C O N G M -- Get console terminal modes. */
Saves initial console mode, and establishes variables for switching
between current (presumably normal) mode and other modes.
Should be called when program starts, but only after establishing
whether program is in the foreground or background.
Returns 1 if it got the modes OK, 0 if it did nothing, -1 on error.
if (backgrd
|| !isatty(0)) { /* If in background. */
cgmf
= -1; /* Don't bother, modes are garbage. */ if (cgmf
> 0) return(0); /* Already did this. */
debug(F100
,"congm getting modes","",0); /* Need to do it. */
ios_$
inq_type_uid(ios_$stdin
, conuid
, st
); if (st
.all
!= status_$ok
) {
fprintf(stderr
, "problem getting stdin objtype: ");
concrp
= (conuid
== mbx_$uid
); if ((fd
= open(CTTNAM
,2)) < 0) { /* Open controlling terminal */
fprintf(stderr
,"Error opening %s\n", CTTNAM
);
if (tcgetattr(fd
,&ccold
) < 0) return(-1);
if (tcgetattr(fd
,&cccbrk
) < 0) return(-1);
if (tcgetattr(fd
,&ccraw
) < 0) return(-1);
if (ioctl(fd
,TCGETA
,&ccold
) < 0) return(-1);
if (ioctl(fd
,TCGETA
,&cccbrk
) < 0) return(-1);
if (ioctl(fd
,TCGETA
,&ccraw
) < 0) return(-1);
cccbrk
.c_line
= 0; /* STTY line 0 for CDC VX/VE */ if (ioctl(fd
,TCSETA
,&cccbrk
) < 0) return(-1);
ccraw
.c_line
= 0; /* STTY line 0 for CDC VX/VE */ if (ioctl(fd
,TCSETA
,&ccraw
) < 0) return(-1);
if (gtty(fd
,&ccold
) < 0) return(-1);
if (gtty(fd
,&cccbrk
) < 0) return(-1);
if (gtty(fd
,&ccraw
) < 0) return(-1);
#endif /* BSD44ORPOSIX */
#ifdef sony_news /* Sony NEWS */
if (ioctl(fd
,TIOCKGET
,&km_con
) < 0) { /* Get console Kanji mode */
perror("congm error getting Kanji mode");
debug(F101
,"congm error getting Kanji mode","",0);
km_con
= -1; /* Make sure this stays undefined. */ cgmf
= 1; /* Flag that we got them. *//* C O N C B -- Put console in cbreak mode. */
/* Returns 0 if ok, -1 if not */
if (cgmf
< 1) return(0); /* Console modes not available yet */
if (ttfdflg
&& ttyfd
>= 0 && ttyfd
< 3)
debug(F101
,"concb backgrd","",backgrd
);
if (!isatty(0)) return(0); /* Only for real ttys */
debug(F100
,"concb isatty","",0);
if (backgrd
) return(0); /* Do nothing if in background. */
escchr
= esc
; /* Make this available to other fns */ ckxech
= 1; /* Program can echo characters */ if (concrp
) return(write(1, "\035\002", 2));
if (conuid
== input_pad_$uid
) {pad_$
raw(ios_$stdin
, st
); return(0);}
#ifndef SVORPOSIX /* BSD, V7, etc */
cccbrk
.sg_flags
|= CBREAK
; /* Set to character wakeup, */ cccbrk
.sg_flags
&= ~ECHO
; /* no echo. */#else /* Sys V and POSIX */
cccbrk
.c_lflag
&= ~(ICANON
|ECHO
|IEXTEN
); cccbrk
.c_cc
[0] = 003; /* interrupt char is control-c */ cccbrk
.c_cc
[VINTR
] = 003; cccbrk
.c_cc
[1] = escchr
; /* escape during packet modes */ cccbrk
.c_cc
[VQUIT
] = escchr
;#ifdef BSD44ORPOSIX /* Set new modes */
x
= tcsetattr(0,TCSADRAIN
,&cccbrk
);#else /* ATTSV */ /* or the POSIX way */
x
= ioctl(0,TCSETAW
,&cccbrk
); /* the Sys V way */#endif /* BSD44ORPOSIX */
if (x
> -1) setbuf(stdout
,NULL
); /* Make console unbuffered. */
qaddr
[CON
] = initrawq(0); if((kmem
[CON
] = open("/dev/kmem", 0)) < 0) {
fprintf(stderr
, "Can't read /dev/kmem in concb.\n");
debug(F101
,"concb returns","",x
);
/* C O N B I N -- Put console in binary mode */
/* Returns 0 if ok, -1 if not */
if (!isatty(0)) return(0); /* only for real ttys */
congm(); /* Get modes if necessary. */
debug(F100
,"conbin","",0);
escchr
= esc
; /* Make this available to other fns */ ckxech
= 1; /* Program can echo characters */ if (concrp
) return(write(1, "\035\002", 2));
if (conuid
== input_pad_$uid
)
pad_$
raw(ios_$stdin
, st
); ccraw
.c_lflag
&= ~(ISIG
|ICANON
|ECHO
|IEXTEN
); ccraw
.c_iflag
|= (BRKINT
|IGNPAR
); ccraw
.c_iflag
&= ~(IGNBRK
|INLCR
|IGNCR
|ICRNL
|IXON
|IXANY
|IXOFF
ccraw
.c_iflag
&= ~(IGNBRK
|INLCR
|IGNCR
|ICRNL
|IUCLC
|IXON
|IXANY
|IXOFF
ccraw
.c_iflag
&= ~(IGNBRK
|INLCR
|IGNCR
|ICRNL
|IXON
|IXOFF
|INPCK
|ISTRIP
); ccraw
.c_cflag
= CLOCAL
| B9600
| CS8
| CREAD
| HUPCL
;/*** Kermit used to put the console in 8-bit raw mode, but some users have
*** pointed out that this should not be done, since some sites actually
*** use terminals with parity settings on their Unix systems, and if we
*** override the current settings and stop doing parity, then their terminals
*** will display blotches for characters whose parity is wrong. Therefore,
*** the following two lines are commented out (Larry Afrin, Clemson U):
*** ccraw.c_cflag &= ~(PARENB|CSIZE);
*** ccraw.c_cflag |= (CS8|CREAD);
*** Sys III/V sites that have trouble with this can restore these lines.
ccraw
.c_cc
[0] = 003; /* Interrupt char is Ctrl-C */ ccraw
.c_cc
[1] = escchr
; /* Escape during packet mode */ ccraw
.c_cc
[VQUIT
] = escchr
; return(tcsetattr(0,TCSADRAIN
,&ccraw
));
return(ioctl(0,TCSETAW
,&ccraw
)); /* Set new modes. */
#endif /* BSD44ORPOSIX */
#else /* Berkeley, etc. */
ccraw
.sg_flags
|= (RAW
|TANDEM
); /* Set rawmode, XON/XOFF (ha) */ ccraw
.sg_flags
&= ~(ECHO
|CRMOD
); /* Set char wakeup, no echo *//* C O N R E S -- Restore the console terminal */
debug(F101
,"conres cgmf","",cgmf
);
if (cgmf
< 1) return(0); /* Do nothing if modes unchanged */
if (!isatty(0)) return(0); /* only for real ttys */
debug(F100
,"conres isatty ok","",0);
ckxech
= 0; /* System should echo chars */ if (concrp
) return(write(1, "\035\001", 2));
if (conuid
== input_pad_$uid
)
pad_$
cooked(ios_$stdin
, st
); debug(F100
,"conres restoring tcsetattr","",0);
return(tcsetattr(0,TCSADRAIN
,&ccold
));
debug(F100
,"conres restoring ioctl","",0);
return(ioctl(0,TCSETAW
,&ccold
));
#else /* BSD, V7, and friends */
#ifdef sony_news /* Sony NEWS */
ioctl(0,TIOCKSET
,&km_con
); /* Restore console Kanji mode */
debug(F100
,"conres restoring stty","",0);
#endif /* BSD44ORPOSIX */
/* C O N O C -- Output a character to the console terminal */
/* C O N X O -- Write x characters to the console terminal */
conxo(x
,s
) int x
; char *s
; {
/* C O N O L -- Write a line to the console terminal */
/* C O N O L A -- Write an array of lines to the console terminal */
for (i
=0 ; *s
[i
] ; i
++) if (conol(s
[i
]) < 0) return(-1);;
/* C O N O L L -- Output a string followed by CRLF */
return(write(1,"\r\n",2));
/* C O N C H K -- Return how many characters available at console */
if (backgrd
|| !isatty(0)) return(0);
x
= ioctl(0, TIOCQCNT
, &ttbuf
); n
= ttbuf
.sg_ispeed
& 0377; if (conbufn
> 0) return(conbufn
); /* use old count if nonzero */
/* read in more characters */
conbufn
= ios_$
get(ios_$stdin
, ios_$cond_opt
, conbuf
, (long)sizeof(conbuf
), st
); if (st
.all
!= status_$ok
) conbufn
= 0;
lseek(kmem
[CON
], (long) qaddr
[CON
], 0);
x
= read(kmem
[CON
], &n
, sizeof(int)); return((x
== sizeof(int))? n
: 0);
if (conesc
) { /* Escape typed */
debug(F100
,"conchk returns conesc","",conesc
);
signal(SIGQUIT
,esctrp
); /* Restore escape */
if (conesc
) { /* Escape typed */
signal(SIGQUIT
,esctrp
); /* Restore escape */
Reportedly, this can cause C-Kermit to be suspended on certain OS's,
such as Olivetti X/OS, when called if Kermit is really in the background.
Hence the change at the top of this routine to return 0 if the backgrd
x
= ioctl(0, FIONREAD
, &n
); /* BSD and maybe some others */ debug(F101
,"conchk","",n
);
return(0); /* Others can't do. */
/* C O N I N C -- Get a character from the console */
Call with timo > 0 to do a timed read, timo == 0 to do an untimed blocking
read. Upon success, returns the character. Upon failure, returns -1.
A timed read that does not complete within the timeout period returns -1.
#ifdef aegis /* Apollo Aegis only... */
debug(F101
,"coninc timo","",timo
);
return(*conbufp
++ & 0377);
if (timo
<= 0 ) { /* Untimed, blocking read. */
while (1) { /* Keep trying till we get one. */
n
= read(0, &ch
, 1); /* Read a character. */ if (n
== 0) continue; /* Shouldn't happen. */
if (n
> 0) /* If read was successful, */
return(ch
& 0377); /* return the character. */
/* Come here if read() returned an error. */
debug(F101
, "coninc(0) errno","",errno
); /* Log the error. */
#ifdef CIE /* CIE Regulus has no EINTR symbol? */
This routine is used for several different purposes. In CONNECT mode, it is
used to do an untimed, blocking read from the keyboard in the lower CONNECT
fork. During local-mode file transfer, it reads a character from the
console to interrupt the file transfer (like A for a status report, X to
cancel a file, etc). Obviously, we don't want the reads in the latter case
to be blocking, or the file transfer would stop until the user typed
something. Unfortunately, System V does not allow the console device input
buffer to be sampled nondestructively (e.g. by conchk()), so a kludge is
used instead. During local-mode file transfer, the SIGQUIT signal is armed
and trapped by esctrp(), and this routine pretends to have read the quit
character from the keyboard normally. But, kludge or no kludge, the read()
issued by this command, under System V only, can fail if a signal -- ANY
signal -- is caught while the read is pending. This can occur not only when
the user types the quit character, but also during telnet negotiations, when
the lower CONNECT fork signals the upper one about an echoing mode change.
When this happens, we have to post the read() again. This is apparently not
a problem in BSD-based UNIX versions.
if (errno
== EINTR
) /* Read interrupted. */
if (conesc
) { /* If by SIGQUIT, */
conesc
= 0; /* the conesc variable is set, */ return(escchr
); /* so return the escape character. */
} else continue; /* By other signal, try again. */
This might be dangerous, but let's do this on non-System V versions too,
since at least one SunOS 4.1.2 user complains of immediate disconnections
upon first making a TELNET connection.
if (errno
== EINTR
) /* Read interrupted. */
/* This should never happen */
debug(F100
,"coninc HORRIBLE ERROR","",0);
saval
= signal(SIGALRM
,timerh
); /* Set up timeout handler. */ xx
= alarm(timo
); /* Set the alarm. */ debug(F101
,"coninc alarm","",xx
);
if (setjmp(sjbuf
)) /* The read() timed out. */
n
= -2; /* Code for timeout. */ ttimoff(); /* Turn off timer */
if (n
> 0) /* Got character OK. */
return(ch
& 0377); /* Return it. */
Read returned an error. Same deal as above, but without the loop.
debug(F101
, "coninc(timo) n","",n
);
debug(F101
, "coninc(timo) errno","",errno
);
if (n
== -1 && errno
== EINTR
&& conesc
!= 0) {
return(escchr
); /* User entered escape character. */
} else /* n == 0 shouldn't happen. */
/* C O N G K S -- Console Get Keyboard Scancode */
This function needs to be filled in with the various system-dependent
system calls used by SUNOS, NeXT OS, Xenix, Aviion, etc, to read a full
keyboard scan code. For now, it's a dummy.
/* A T T D I A L -- Dial up the remote system using internal modem
* Purpose: to open and dial a number on the internal modem available on the
* ATT7300 UNIX PC. Written by Joe Doupnik. Superceeds version written by
* Richard E. Hill, Dickinson, TX. which employed dial(3c).
* Uses information in <sys/phone.h> and our status int attmodem.
attdial(ttname
,speed
,telnbr
) char *ttname
,*telnbr
; long speed
; {
attmodem
&= ~ISMODEM
; /* modem not in use yet */ /* Ensure O_NDELAY is set, else i/o traffic hangs */
/* We turn this flag off once the dial is complete */
fcntl(ttyfd
, F_SETFL
, fcntl(ttyfd
, F_GETFL
, 0) | O_NDELAY
);
/* Condition line, check availability & DATA mode, turn on speaker */
if (ioctl(ttyfd
,PIOCOFFHOOK
, &dialer
) == -1) {
printf("cannot access phone\n");
ioctl(ttyfd
,PIOCGETP
,&dialer
); /* get phone dialer parameters */
if (dialer
.c_lineparam
& VOICE
) { /* phone must be in DATA mode */
printf(" Should not dial with modem in VOICE mode.\n");
printf(" Exit Kermit, switch to DATA and retry call.\n");
#ifdef ATTTONED /* Old way, tone dialing only. */
dialer
.c_lineparam
= DATA
| DTMF
; /* Dial with tones, */ dialer
.c_lineparam
&= ~PULSE
; /* not with pulses. */ /* Leave current pulse/tone state alone. */
/* But what about DATA? Add it back if you have trouble. */
/* sys/phone says you get DATA automatically by opening device RDWR */
dialer
.c_waitdialtone
= 5; /* wait 5 sec for dialtone */ dialer
.c_feedback
= SPEAKERON
|NORMSPK
|RINGON
; /* control speaker */ /* sys/phone says RINGON used only for incoming voice calls */
dialer
.c_feedback
&= ~(SOFTSPK
|LOUDSPK
); dialer
.c_feedback
|= SPEAKERON
|NORMSPK
; dialer
.c_waitflash
= 500; /* 0.5 sec flash hook */ if(ioctl(ttyfd
,PIOCSETP
,&dialer
) == -1) { /* set phone parameters */
printf("Cannot set modem characteristics\n");
ioctl(ttyfd
,PIOCRECONN
,0); /* Turns on speaker for pulse */
fprintf(stderr
,"Phone line status. line_par:%o dialtone_wait:%o \
line_status:%o feedback:%o\n",
dialer
.c_lineparam
, dialer
.c_waitdialtone
, dialer
.c_linestatus
, dialer
.c_feedback
); attmodem
|= ISMODEM
; /* modem is now in-use */ for (telnum
= telnbr
; *telnum
!= '\0'; telnum
++) /* dial number */
if (ioctl(ttyfd
,PIOCDIAL
,telnum
) != 0) {
perror("Error in dialing");
#else /* Allow Pulse or Tone dialing */
case 't': case 'T': case '%': /* Tone dialing requested */
dialer
.c_lineparam
|= DTMF
; dialer
.c_lineparam
&= ~PULSE
; if (ioctl(ttyfd
,PIOCSETP
,&dialer
) == -1) {
printf("Cannot set modem to tone dialing\n");
case 'd': case 'D': case 'p': case 'P': case '^':
dialer
.c_lineparam
|= PULSE
; dialer
.c_lineparam
&= ~DTMF
; if (ioctl(ttyfd
,PIOCSETP
,&dialer
) == -1) {
printf("Cannot set modem to pulse dialing\n");
if (ioctl(ttyfd
,PIOCDIAL
,telnum
) != 0) {
ioctl(ttyfd
,PIOCDIAL
,"@"); /* terminator for data call */
do { /* wait for modems to Connect */
if (ioctl(ttyfd
,PIOCGETP
,&dialer
) != 0) { /* get params */
perror("Cannot get modems to connect");
} while ((dialer
.c_linestatus
& MODEMCONNECTED
) == 0);
/* Turn off O_NDELAY flag now. */
fcntl(ttyfd
, F_SETFL
, fcntl(ttyfd
, F_GETFL
, 0) & ~O_NDELAY
);
signal(SIGHUP
, ttclos
); /* hangup on loss of carrier */
return(0); /* return success */
Offgetty, ongetty functions. These function get the 'getty(1m)' off
and restore it to the indicated line. Shell's return codes are:
0: Can't do it. Probably a user logged on.
1: No need. No getty on that line.
2: Done, you should restore the getty when you're done.
DOGETY System(3), however, returns them as 0, 256, 512, respectively.
Thanks to Kevin O'Gorman, Anarm Software Systems.
getoff.sh looks like: geton.sh looks like:
setgetty $1 0 setgetty $1 1
/* O F F G E T T Y -- Turn off getty(1m) for the communications tty line
* and get status so it can be restarted after the line is hung up.
offgetty(ttname
) char *ttname
; {
while (*ttname
!= '\0') ttname
++; /* seek terminator of path */
ttname
-= 3; /* get last 3 chars of name */ sprintf(temp
,"/usr/bin/getoff.sh %s",ttname
);
/* O N G E T T Y -- Turn on getty(1m) for the communications tty line */
ongetty(ttname
) char *ttname
; {
while (*ttname
!= '\0') ttname
++; /* comms tty path name */
sprintf(temp
,"/usr/bin/geton.sh %s",ttname
);
/* T T S C A R R -- Set ttcarr variable, controlling carrier handling.
* 0 = Off: Always ignore carrier. E.g. you can connect without carrier.
* 1 = On: Heed carrier, except during dialing. Carrier loss gives disconnect.
* 2 = Auto: For "modem direct": The same as "Off".
* For real modem types: Heed carrier during connect, but ignore
* it anytime else. Compatible with pre-5A C-Kermit versions.
* As you can see, this setting does not affect dialing, which always ignores
* carrier (unless there is some special exception for some modem type). It
* does affect ttopen() if it is set before ttopen() is used. This setting
* takes effect on the next call to ttopen()/ttpkt()/ttvt(). And they are
* (or should be) always called before any communications is tried, which
* means that, practically speaking, the effect is immediate.
* Of course, nothing of this applies to remote mode (xlocal = 0).
* Someone has yet to uncover how to manipulate the carrier in the BSD
* environment (or any non-termio using environment). Until that time, this
* will simply be a no-op for BSD.
* Note that in previous versions, the carrier was most often left unchanged
* in ttpkt()/ttvt() unless they were called with FLO_DIAL or FLO_DIAX. This
* has changed. Now it is controlled by ttcarr in conjunction with these
ttscarr(carrier
) int carrier
; {
debug(F101
, "ttscarr","",ttcarr
);
/* C A R R C T L -- Set tty modes for carrier treatment.
* Sets the appropriate bits in a termio or sgttyb struct for carrier control
* (actually, there are no bits in sgttyb for that), or performs any other
* operations needed to control this on the current system. The function does
* not do the actual TCSETA or stty, since often we want to set other bits too
* first. Don't call this function when xlocal is 0, or the tty is not opened.
* We don't know how to do anything like carrier control on non-ATTSV systems,
* except, apparently, ultrix. See above. It is also known that this doesn't
* have much effect on a Xenix system. For Xenix, one should switch back and
* forth between the upper and lower case device files. Maybe later.
* Presently, Xenix will stick to the mode it was opened with.
* carrier: 0 = ignore carrier, 1 = require carrier.
* The current state is saved in curcarr, and checked to save labour.
carrctl(ttpar
, carrier
) struct termios
*ttpar
; int carrier
;
carrctl(ttpar
, carrier
) struct termio
*ttpar
; int carrier
;
#endif /* BSD44ORPOSIX */
debug(F101
, "carrctl","",carrier
);
ttpar
->c_cflag
&= ~CLOCAL
; ttpar
->c_cflag
|= CLOCAL
;#else /* Berkeley, V7, et al... */
carrctl(ttpar
, carrier
) struct sgttyb
*ttpar
; int carrier
; {
int modem_status
, lnohang
= LNOHANG
;
debug(F101
, "carrctl","",carrier
);
ioctl(ttyfd
, TIOCMODEM
, &temp
);
ioctl(ttyfd
, TIOCHPCL
, 0);
/* (According to the manuals, TIOCNCAR should be preferred */
/* over TIOCNMODEM...) */
ioctl(ttyfd
, TIOCNMODEM
, &temp
);
From Fulvio Marino at Olivetti. This code allows CONNECT to work even
if DCD/RTS are down, if "carrier" is set appropriately.
if (ioctl(ttyfd
, TIOCMODG
, &modem_status
) == 0) {
/* enable carrier detect */
modem_status
|= TIOCM_CAR
; /* disable carrier detect */
modem_status
&= ~TIOCM_CAR
; (void)ioctl(ttyfd
, TIOCMODS
, &modem_status
);
/* Send hangup when carrier drops */
(void)ioctl(ttyfd
, TIOCLBIC
, &lnohang
);
(void)ioctl(ttyfd
, TIOCHPCL
, NULL
);
/* Don't send hangup when carrier drops */
(void)ioctl(ttyfd
, TIOCLBIS
, &lnohang
);
/* T T G M D M -- Get modem signals */
Looks for RS-232 modem signals, and returns those that are on in as its
return value, in a bit mask composed of the BM_xxx values defined in ckcdeb.h.
-2 if the communication device does not have modem control (e.g. telnet)
>= 0 on success, with a bit mask containing the modem signals that are on.
Define the symbol K_MDMCTL if we have Sys V R3 / 4.3 BSD style
modem control, namely the TIOCMGET ioctl.
#ifdef HPUX /* HPUX has its own way */
NOTE: I don't have an HPUX man page, and so I'm only guessing at the
right names for these symbols. Somebody with HPUX please let me know
what corrections are needed.
if (netconn
) return(-2); /* No modem signals for network */
if (xlocal
) /* Get modem signals */
x
= ioctl(ttyfd
,MCGETA
,&y
); debug(F101
,"ttgmdm","",y
);
z
= 0; /* Initialize return value *//* Now set bits for each modem signal that is reported to be on. */
if (y
& MCTS
) z
|= BM_CTS
;
if (y
& MDSR
) z
|= BM_DSR
;
if (y
& MDCD
) z
|= BM_DCD
;
if (y
& MRNG
) z
|= BM_RNG
;
/* Data Terminal Ready */
if (y
& MDTR
) z
|= BM_DTR
;
if (y
& MRTS
) z
|= BM_RTS
;
Note, <sys/ttycom> might have already been included by by <sys/ioctl.h>.
Hence the following ifndef on a symbol which is defined there.
if (netconn
) return(-2); /* Network, no modem signals. */
x
= ioctl(ttyfd
,TIOCMGET
,&y
); /* Get modem signals. */ x
= ioctl(0,TIOCMGET
,&y
); debug(F101
,"ttgmdm","",y
);
z
= 0; /* Initialize return value. */ if (y
& TIOCM_CTS
) z
|= BM_CTS
;
if (y
& TIOCM_DSR
) z
|= BM_DSR
;
if (y
& TIOCM_CAR
) z
|= BM_DCD
;
if (y
& TIOCM_RNG
) z
|= BM_RNG
;
/* Data Terminal Ready */
if (y
& TIOCM_DTR
) z
|= BM_DTR
;
if (y
& TIOCM_RTS
) z
|= BM_RTS
;
/* P S U S P E N D -- Put this process in the background. */
Call with flag nonzero if suspending is allowed, zero if not allowed.
Returns 0 on apparent success, -1 on failure (flag was zero, or
kill() returned an error code.
psuspend(flag
) int flag
; {
if (flag
== 0) return(-1);
The big question here is whether job control is *really* supported.
There's no way Kermit can know for sure. The fact that SIGTSTP is
defined does not guarantee the Unix kernel supports it, and the fact
that the Unix kernel supports it doesn't guarantee that the user's
shell (or other process that invoked Kermit) supports it.
Because "kill(myself,SIGSTOP)" can't be caught, blocked, or ignored..."
&& kill(getpid(),SIGSTOP
) < 0
/* Let's try this for MIPS too. */
&& kill(getpid(),SIGSTOP
) < 0
) { /* If job control, suspend the job */
debug(F101
,"psuspend error","",errno
);
debug(F100
,"psuspend ok","",0);
setuid package, by Kristoffer Eriksson, with contributions from Dean
extern UID_T
getuid(), geteuid(), getreuid();
extern GID_T
getgid(), getegid(), getregid();
#endif /* _POSIX_SOURCE */
To: fdc@watsun.cc.columbia.edu (Frank da Cruz)
Date: Sat, 21 Apr 90 4:48:25 MES
From: Kristoffer Eriksson <ske@pkmab.se>
This is a set of functions to be used in programs that may be run set-user-id
and/or set-group-id. They handle both the case where the program is not run
with such privileges (nothing special happens then), and the case where one
or both of these set-id modes are used. The program is made to run with the
user's real user and group ids most of the time, except for when more
privileges are needed. Don't set-user-id to "root".
This works on System V and POSIX. In BSD, it depends on the
"saved-set-user-id" feature.
#define UID_ROOT 0 /* Root user and group ids */
The following construction automatically defines the symbol SETREUID for
Unix versions based on Berkeley Unix 4.2 or later. If this symbol is
defined, then this program will use getreuid() and getregid() calls in
preference to getuid() and getgid(), which in Berkeley-based Unixes do
not allow arbitrary switching back and forth of real & effective uid.
This construction also allows -DSETREUID to be put on the cc command line
for any system that has and wants to use setre[ug]id(). It also prevents
automatic definition of SETREUID if -DNOSETREU is included on the cc
command line (or otherwise defined).
#ifdef FT18 /* None of this for Fortune. */
/* Variables for user and group IDs. */
static UID_T realuid
= (UID_T
) -1, privuid
= (UID_T
) -1;
static GID_T realgid
= (GID_T
) -1, privgid
= (GID_T
) -1;
/* P R I V _ I N I -- Initialize privileges package */
/* Called as early as possible in a set-uid or set-gid program to store the
* set-to uid and/or gid and step down to the users real uid and gid. The
* stored id's can be temporarily restored (allowed in System V) during
* operations that require the privilege. Most of the time, the program
* should execute in unpriviliged state, to not impose any security threat.
* Note: Don't forget that access() always uses the real id:s to determine
* file access, even with privileges restored.
* Returns an error mask, with error values or:ed together:
* 2 if setgid() fails, and
* 4 if the program is set-user-id to "root", which can't be handled.
* Only the return value 0 indicates real success. In case of failure,
* those privileges that could be reduced have been, at least, but the
* program should be aborted none-the-less.
* Also note that these functions do not expect the uid or gid to change
* without their knowing. It may work if it is only done temporarily, but
/* Save current effective ID:s, those set to at program exec. */
/* If running set-uid, go down to real uid, otherwise remember that
* no privileged uid is available.
* 1) If the real uid is already "root" and the set-uid uid (the
* initial effective uid) is not "root", then we would have trouble
* if we went "down" to "root" here, and then temporarily back to the
* set-uid uid (not "root") and then again tried to become "root". I
* think the "saved set-uid" is lost when changing uid from effective
* uid "root", which changes all uid, not only the effective uid. But
* in this situation, we can simply go to "root" and stay there all
* the time. That should give sufficient privilege (understatement!),
* and give the right uids for subprocesses.
* 2) If the set-uid (the initial effective uid) is "root", and we
* change uid to the real uid, we can't change it back to "root" when
* we need the privilege, for the same reason as in 1). Thus, we can't
* handle programs that are set-user-id to "root" at all. The program
* should be aborted. Use some other uid. "root" is probably to
* privileged for such things, anyway. (The uid is reverted to the
* real uid until abortion.)
* These two exceptions have the effect that the "root" uid will never
* be one of the two uids that are being switched between, which also
* means we don't have to check for such cases in the switching
* Note that exception 1) is handled by these routines (by constantly
* running with uid "root", while exception 2) is a serious error, and
* is not provided for at all in the switching functions.
privuid
= (UID_T
) -1; /* Not running set-user-id. */ /* If running set-gid, go down to real gid, otherwise remember that
* no privileged gid is available.
* There are no exception like there is for the user id, since there
* is no group id that is privileged in the manner of uid "root".
* There could be equivalent problems for group changing if the
* program sometimes ran with uid "root" and sometimes not, but
* that is already avoided as explained above.
* Thus we can expect always to be able to switch to the "saved set-
* gid" when we want, and back to the real gid again. You may also
* draw the conclusion that set-gid provides for fewer hassles than
if (realgid
== privgid
) /* If not running set-user-id, */
privgid
= (GID_T
) -1; /* remember it this way. */ err
= priv_off(); /* Turn off setuid privilege. */ if (privuid
== UID_ROOT
) /* If setuid to root, */
err
|= 4; /* return this error. */ if (realuid
== UID_ROOT
) /* If real id is root, */
privuid
= (UID_T
) -1; /* stay root at all times. *//* Macros for hiding the differences in UID/GID setting between various Unix
* systems. These macros should always be called with both the privileged ID
* and the non-privileged ID. The one in the second argument, will become the
* effective ID. The one in the first argument will be retained for later
/* On BSD systems with the saved-UID feature, we just juggle the effective
* UID back and forth, and leave the real UID at its true value. The kernel
* allows switching to both the current real UID, the effective UID, and the
* UID which the program is set-UID to. The saved set-UID always holds the
* privileged UID for us, and the real UID will always be the non-privileged,
* and we can freely choose one of them for the effective UID at any time.
#define switchuid(hidden,active) setreuid( (UID_T) -1, active)
#define switchgid(hidden,active) setregid( (GID_T) -1, active)
#else /* SETREUID,!SAVEDUID */
/* On systems with setreXid() but without the saved-UID feature, notably
* BSD 4.2, we swap the real and effective UIDs each time. It's
* the effective UID that we are interrested in, but we have to retain the
* unused UID somewhere to enable us to restore it later, and that we do this
* in the real UID. The kernel only allows switching to either the current
* real or the effective UID, unless you're "root".
#define switchuid(hidden,active) setreuid(hidden,active)
#define switchgid(hidden,active) setregid(hidden,active)
#else /* !SETREUID, !SAVEDUID */
/* On System V and POSIX, the only thing we can change is the effective UID
* (unless the current effective UID is "root", but initsuid() avoids that for
* us). The kernel allows switching to the current real UID or to the saved
* set-UID. These are always set to the non-privileged UID and the privileged
* UID, respectively, and we only change the effective UID. This breaks if
* the current effective UID is "root", though, because for "root" setuid/gid
* becomes more powerful, which is why initsuid() treats "root" specially.
* Note: That special treatment maybe could be ignored for BSD? Note: For
* systems that don't fit any of these three cases, we simply can't support
#define switchuid(hidden,active) setuid(active)
#define switchgid(hidden,active) setgid(active)
/* P R I V _ O N -- Turn on the setuid and/or setgid */
/* Go to the privileged uid (gid) that the program is set-user-id
* (set-group-id) to, unless the program is running unprivileged.
* If setuid() fails, return value will be 1. If getuid() fails it
* will be 2. Return immediately after first failure, and the function
* tries to restore any partial work done. Returns 0 on success.
* Group id is changed first, since it is less serious than user id.
if (privgid
!= (GID_T
) -1)
if (switchgid(realgid
,privgid
))
if (privuid
!= (UID_T
) -1)
if (switchuid(realuid
,privuid
)) {
if (privgid
!= (GID_T
) -1)
switchgid(privgid
,realgid
);
/* P R I V _ O F F -- Turn on the real uid and gid */
/* Return to the unprivileged uid (gid) after an temporary visit to
* privileged status, unless the program is running without set-user-id
* (set-group-id). Returns 1 for failure in setuid() and 2 for failure
* in setgid() or:ed together. The functions tries to return both uid
* and gid to unprivileged state, regardless of errors. Returns 0 on
if (privuid
!= (UID_T
) -1)
if (switchuid(privuid
,realuid
))
if (privgid
!= (GID_T
) -1)
if (switchgid(privgid
,realgid
))
/* Turn off privilege permanently. No going back. This is necessary before
* a fork() on BSD43 machines that don't save the setUID or setGID, because
* we swap the real and effective ids, and we don't want to let the forked
* process swap them again and get the privilege back. It will work on other
* machines too, such that you can rely on its effect always being the same,
* for instance, even when you're in priv_on() state when this is called.
* (Well, that part about "permanent" is on System V only true if you follow
* this with a call to exec(), but that's what we want it for anyway.)
* Added by Dean Long -- dlong@midgard.ucsc.edu
if (privuid
!= (UID_T
) -1)
if (setreuid(realuid
,realuid
))
if (privgid
!= (GID_T
) -1)
if (setregid(realgid
,realgid
))
/* Easy way of using setuid()/setgid() instead of setreuid()/setregid().*/
/* P R I V _ O P N -- For opening protected files or devices. */
priv_opn(name
, modes
) char *name
; int modes
; {
priv_on(); /* Turn privileges on */
x
= open(name
, modes
); /* Try to open the device */ priv_off(); /* Turn privileges off */
return(x
); /* Return open's return code */
/* P R I V _ C H K -- Check privileges. */
/* Try to turn them off. If turning them off did not succeed, cancel them */
x
= priv_off(); /* Turn off privs. */ if (x
!= 0 || getuid() == privuid
|| geteuid() == privuid
)
if (x
!= 0 || getgid() == privgid
|| getegid() == privgid
)
ttimoff() { /* Turn off any timer interrupts */
As of 5A(183), we set SIGALRM to SIG_IGN (to ignore alarms) rather than to
SIG_DFL (to catch alarms, or if there is no handler, to exit). This is to
cure (mask, really) a deeper problem with stray alarms that occurs on some
systems, possibly having to do with sleep(), that caused core dumps. It
should be OK to do this, because no code in this module uses nested alarms.
(But we still have to watch out for SCRIPT and DIAL...)
/* debug(F101,"ttimoff alarm","",xx); */
if (saval
) { /* Restore any previous */
signal(SIGALRM
,saval
); /* alarm handler. */
/* debug(F101,"ttimoff alarm restoring saval","",saval); */
signal(SIGALRM
,SIG_IGN
); /* Used to be SIG_DFL */
/* debug(F100,"ttimoff alarm SIG_IGN","",0); */
projects / unix-history / blob