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BSD 4_3_Net_2 release
[unix-history] / usr / src / usr.bin / tn3270 / sys_curses / termout.c
/*-
* Copyright (c) 1988 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
static char sccsid[] = "@(#)termout.c 4.3 (Berkeley) 4/26/91";
#endif /* not lint */
#if defined(unix)
#include <signal.h>
#include <sgtty.h>
#endif
#include <stdio.h>
#include <curses.h>
#if defined(ultrix)
/* Some version of this OS has a bad definition for nonl() */
#undef nl
#undef nonl
#define nl() (_tty.sg_flags |= CRMOD,_pfast = _rawmode,stty(_tty_ch, &_tty))
#define nonl() (_tty.sg_flags &= ~CRMOD, _pfast = TRUE, stty(_tty_ch, &_tty))
#endif /* defined(ultrix) */
#include "../general/general.h"
#include "terminal.h"
#include "../api/disp_asc.h"
#include "../ctlr/hostctlr.h"
#include "../ctlr/externs.h"
#include "../ctlr/declare.h"
#include "../ctlr/oia.h"
#include "../ctlr/screen.h"
#include "../ctlr/scrnctlr.h"
#include "../general/globals.h"
#include "../telextrn.h"
#define CorrectTerminalCursor() ((TransparentClock == OutputClock)? \
CursorAddress:UnLocked? CursorAddress: HighestScreen())
static int terminalCursorAddress; /* where the cursor is on term */
static int screenInitd; /* the screen has been initialized */
static int screenStopped; /* the screen has been stopped */
static int max_changes_before_poll; /* how many characters before looking */
/* at terminal and net again */
static int needToRing; /* need to ring terinal bell */
static char *bellSequence = "\07"; /* bell sequence (may be replaced by
* VB during initialization)
*/
static WINDOW *bellwin = 0; /* The window the bell message is in */
int bellwinup = 0; /* Are we up with it or not */
#if defined(unix)
static char *myKS, *myKE;
#endif /* defined(unix) */
static int inHighlightMode = 0;
ScreenImage Terminal[MAXSCREENSIZE];
/* Variables for transparent mode */
#if defined(unix)
static int tcflag = -1; /* transparent mode command flag */
static int savefd[2]; /* for storing fds during transcom */
extern int tin, tout; /* file descriptors */
#endif /* defined(unix) */
\f
/*
* init_screen()
*
* Initialize variables used by screen.
*/
void
init_screen()
{
bellwinup = 0;
inHighlightMode = 0;
ClearArray(Terminal);
}
/* OurExitString - designed to keep us from going through infinite recursion */
static void
OurExitString(string, value)
char *string;
int value;
{
static int recursion = 0;
if (!recursion) {
recursion = 1;
ExitString(string, value);
}
}
/* DoARefresh */
static void
DoARefresh()
{
if (ERR == refresh()) {
OurExitString("ERR from refresh\n", 1);
}
}
static void
GoAway(from, where)
char *from; /* routine that gave error */
int where; /* cursor address */
{
char foo[100];
sprintf(foo, "ERR from %s at %d (%d, %d)\n",
from, where, ScreenLine(where), ScreenLineOffset(where));
OurExitString(foo, 1);
/* NOTREACHED */
}
\f
/* What is the screen address of the attribute byte for the terminal */
static int
WhereTermAttrByte(p)
register int p;
{
register int i;
i = p;
do {
if (TermIsStartField(i)) {
return(i);
}
i = ScreenDec(i);
} while (i != p);
return(LowestScreen()); /* unformatted screen... */
}
\f
/*
* There are two algorithms for updating the screen.
* The first, SlowScreen() optimizes the line between the
* computer and the screen (say a 9600 baud line). To do
* this, we break out of the loop every so often to look
* at any pending input from the network (so that successive
* screens will only partially print until the final screen,
* the one the user possibly wants to see, is displayed
* in its entirety).
*
* The second algorithm tries to optimize CPU time (by
* being simpler) at the cost of the bandwidth to the
* screen.
*
* Of course, curses(3X) gets in here also.
*/
#if defined(NOT43)
static int
#else /* defined(NOT43) */
static void
#endif /* defined(NOT43) */
SlowScreen()
{
register int is, shouldbe, isattr, shouldattr;
register int pointer;
register int fieldattr, termattr;
register int columnsleft;
#define NORMAL 0
#define HIGHLIGHT 1 /* Mask bits */
#define NONDISPLAY 4 /* Mask bits */
#define UNDETERMINED 8 /* Mask bits */
#define DoAttributes(x) \
switch (x&ATTR_DSPD_MASK) { \
case ATTR_DSPD_NONDISPLAY: \
x = NONDISPLAY; \
break; \
case ATTR_DSPD_HIGH: \
x = HIGHLIGHT; \
break; \
default: \
x = 0; \
break; \
}
# define SetHighlightMode(x) \
{ \
if ((x)&HIGHLIGHT) { \
if (!inHighlightMode) { \
inHighlightMode = HIGHLIGHT; \
standout(); \
} \
} else { \
if (inHighlightMode) { \
inHighlightMode = 0; \
standend(); \
} \
} \
}
# define DoCharacterAt(c,p) { \
if (p != HighestScreen()) { \
c = disp_asc[c&0xff]; \
if (terminalCursorAddress != p) { \
if (ERR == mvaddch(ScreenLine(p), \
ScreenLineOffset(p), c)) {\
GoAway("mvaddch", p); \
} \
} else { \
if (ERR == addch(c)) {\
GoAway("addch", p); \
} \
} \
terminalCursorAddress = ScreenInc(p); \
} \
}
/* run through screen, printing out non-null lines */
/* There are two separate reasons for wanting to terminate this
* loop early. One is to respond to new input (either from
* the terminal or from the network [host]). For this reason,
* we expect to see 'HaveInput' come true when new input comes in.
*
* The second reason is a bit more difficult (for me) to understand.
* Basically, we don't want to get too far ahead of the characters that
* appear on the screen. Ideally, we would type out a few characters,
* wait until they appeared on the screen, then type out a few more.
* The reason for this is that the user, on seeing some characters
* appear on the screen may then start to type something. We would
* like to look at what the user types at about the same 'time'
* (measured by characters being sent to the terminal) that the
* user types them. For this reason, what we would like to do
* is update a bit, then call curses to do a refresh, flush the
* output to the terminal, then wait until the terminal data
* has been sent.
*
* Note that curses is useful for, among other things, deciding whether
* or not to send :ce: (clear to end of line), so we should call curses
* at end of lines (beginning of next lines).
*
* The problems here are the following: If we do lots of write(2)s,
* we will be doing lots of context switches, thus lots of overhead
* (which we have already). Second, if we do a select to wait for
* the output to drain, we have to contend with the fact that NOW
* we are scheduled to run, but who knows what the scheduler will
* decide when the output has caught up.
*/
if (Highest >= HighestScreen()) { /* Could be > if screen shrunk... */
Highest = ScreenDec(Highest); /* else, while loop will never end */
}
if (Lowest < LowestScreen()) {
Lowest = LowestScreen(); /* could be -1 in some cases with
* unformatted screens.
*/
}
if (Highest >= (pointer = Lowest)) {
/* if there is anything to do, do it. We won't terminate
* the loop until we've gone at least to Highest.
*/
while ((pointer <= Highest) && !HaveInput) {
/* point at the next place of disagreement */
pointer += (bunequal(Host+pointer, Terminal+pointer,
(Highest-pointer+1)*sizeof Host[0])/sizeof Host[0]);
/*
* How many characters to change until the end of the
* current line
*/
columnsleft = NumberColumns - ScreenLineOffset(pointer);
/*
* Make sure we are where we think we are.
*/
move(ScreenLine(pointer), ScreenLineOffset(pointer));
/* what is the field attribute of the current position */
if (FormattedScreen()) {
fieldattr = FieldAttributes(pointer);
DoAttributes(fieldattr);
} else {
fieldattr = NORMAL;
}
if (TerminalFormattedScreen()) {
termattr = TermAttributes(pointer);
DoAttributes(termattr);
} else {
termattr = NORMAL;
}
SetHighlightMode(fieldattr);
/*
* The following will terminate at least when we get back
* to the original 'pointer' location (since we force
* things to be equal).
*/
for (;;) {
if (IsStartField(pointer)) {
shouldbe = DISP_BLANK;
shouldattr = 0;
fieldattr = GetHost(pointer);
DoAttributes(fieldattr);
} else {
if (fieldattr&NONDISPLAY) {
shouldbe = DISP_BLANK;
} else {
shouldbe = GetHost(pointer);
}
shouldattr = fieldattr;
}
if (TermIsStartField(pointer)) {
is = DISP_BLANK;
isattr = 0;
termattr = UNDETERMINED; /* Need to find out AFTER update */
} else {
if (termattr&NONDISPLAY) {
is = DISP_BLANK;
} else {
is = GetTerminal(pointer);
}
isattr = termattr;
}
if ((shouldbe == is) && (shouldattr == isattr)
&& (GetHost(pointer) == GetTerminal(pointer))
&& (GetHost(ScreenInc(pointer))
== GetTerminal(ScreenInc(pointer)))) {
break;
}
if (shouldattr^inHighlightMode) {
SetHighlightMode(shouldattr);
}
DoCharacterAt(shouldbe, pointer);
if (IsStartField(pointer)) {
TermNewField(pointer, FieldAttributes(pointer));
termattr = GetTerminal(pointer);
DoAttributes(termattr);
} else {
SetTerminal(pointer, GetHost(pointer));
/*
* If this USED to be a start field location,
* recompute the terminal attributes.
*/
if (termattr == UNDETERMINED) {
termattr = WhereTermAttrByte(pointer);
if ((termattr != 0) || TermIsStartField(0)) {
termattr = GetTerminal(termattr);
DoAttributes(termattr);
} else { /* Unformatted screen */
termattr = NORMAL;
}
}
}
pointer = ScreenInc(pointer);
if (!(--columnsleft)) {
DoARefresh();
EmptyTerminal();
if (HaveInput) { /* if input came in, take it */
int c, j;
/*
* We need to start a new terminal field
* at this location iff the terminal attributes
* of this location are not what we have had
* them as (ie: we've overwritten the terminal
* start field, a the previous field had different
* display characteristics).
*/
isattr = TermAttributes(pointer);
DoAttributes(isattr);
if ((!TermIsStartField(pointer)) &&
(isattr != termattr)) {
/*
* Since we are going to leave a new field
* at this terminal position, we
* need to make sure that we get an actual
* non-highlighted blank on the screen.
*/
if ((is != DISP_BLANK) || (termattr&HIGHLIGHT)) {
SetHighlightMode(0); /* Turn off highlight */
c = ScreenInc(pointer);
j = DISP_BLANK;
DoCharacterAt(j, c);
}
if (termattr&HIGHLIGHT) {
termattr = ATTR_DSPD_HIGH;
} else if (termattr&NONDISPLAY) {
termattr = ATTR_DSPD_NONDISPLAY;
} else {
termattr = 0;
}
TermNewField(pointer, termattr);
}
break;
}
move(ScreenLine(pointer), 0);
columnsleft = NumberColumns;
}
} /* end of for (;;) */
} /* end of while (...) */
}
DoARefresh();
Lowest = pointer;
if (Lowest > Highest) { /* if we finished input... */
Lowest = HighestScreen()+1;
Highest = LowestScreen()-1;
terminalCursorAddress = CorrectTerminalCursor();
if (ERR == move(ScreenLine(terminalCursorAddress),
ScreenLineOffset(terminalCursorAddress))) {
GoAway("move", terminalCursorAddress);
}
DoARefresh();
if (needToRing) {
StringToTerminal(bellSequence);
needToRing = 0;
}
}
EmptyTerminal(); /* move data along */
return;
}
\f
#if defined(NOT43)
static int
#else /* defined(NOT43) */
static void
#endif /* defined(NOT43) */
FastScreen()
{
#if defined(MSDOS)
#define SaveCorner 0
#else /* defined(MSDOS) */
#define SaveCorner 1
#endif /* defined(MSDOS) */
#define DoAttribute(a) if (IsHighlightedAttr(a)) { \
standout(); \
} else { \
standend(); \
} \
if (IsNonDisplayAttr(a)) { \
a = 0; /* zero == don't display */ \
} \
if (!FormattedScreen()) { \
a = 1; /* one ==> do display on unformatted */\
}
ScreenImage *p, *upper;
int fieldattr; /* spends most of its time == 0 or 1 */
/* OK. We want to do this a quickly as possible. So, we assume we
* only need to go from Lowest to Highest. However, if we find a
* field in the middle, we do the whole screen.
*
* In particular, we separate out the two cases from the beginning.
*/
if ((Highest != HighestScreen()) || (Lowest != LowestScreen())) {
register int columnsleft;
move(ScreenLine(Lowest), ScreenLineOffset(Lowest));
p = &Host[Lowest];
#if !defined(MSDOS)
if (Highest == HighestScreen()) {
Highest = ScreenDec(Highest);
}
#endif /* !defined(MSDOS) */
upper = &Host[Highest];
fieldattr = FieldAttributes(Lowest);
DoAttribute(fieldattr); /* Set standout, non-display status */
columnsleft = NumberColumns-ScreenLineOffset(p-Host);
while (p <= upper) {
if (IsStartFieldPointer(p)) { /* New field? */
Highest = HighestScreen();
Lowest = LowestScreen();
FastScreen(); /* Recurse */
return;
} else if (fieldattr) { /* Should we display? */
/* Display translated data */
addch((char)disp_asc[GetTerminalPointer(p)]);
} else {
addch(' '); /* Display a blank */
}
/* If the physical screen is larger than what we
* are using, we need to make sure that each line
* starts at the beginning of the line. Otherwise,
* we will just string all the lines together.
*/
p++;
if (--columnsleft == 0) {
int i = p-Host;
move(ScreenLine(i), 0);
columnsleft = NumberColumns;
}
}
} else { /* Going from Lowest to Highest */
unsigned char tmpbuf[MAXNUMBERCOLUMNS+1];
ScreenImage *End = &Host[ScreenSize]-1-SaveCorner;
register unsigned char *tmp = tmpbuf, *tmpend = tmpbuf+NumberColumns;
*tmpend = 0; /* terminate from the beginning */
move(0,0);
p = Host;
fieldattr = FieldAttributes(LowestScreen());
DoAttribute(fieldattr); /* Set standout, non-display status */
while (p <= End) {
if (IsStartFieldPointer(p)) { /* New field? */
if (tmp != tmpbuf) {
*tmp++ = 0; /* close out */
addstr((char *)tmpbuf);
tmp = tmpbuf;
tmpend = tmpbuf+NumberColumns-ScreenLineOffset(p-Host)-1;
}
standend();
addch(' ');
fieldattr = FieldAttributesPointer(p); /* Get attributes */
DoAttribute(fieldattr); /* Set standout, non-display */
} else {
if (fieldattr) { /* Should we display? */
/* Display translated data */
*tmp++ = disp_asc[GetTerminalPointer(p)];
} else {
*tmp++ = ' ';
}
}
/* If the physical screen is larger than what we
* are using, we need to make sure that each line
* starts at the beginning of the line. Otherwise,
* we will just string all the lines together.
*/
p++;
if (tmp == tmpend) {
int i = p-Host; /* Be sure the "p++" happened first! */
*tmp++ = 0;
addstr((char *)tmpbuf);
tmp = tmpbuf;
move(ScreenLine(i), 0);
tmpend = tmpbuf + NumberColumns;
}
}
if (tmp != tmpbuf) {
*tmp++ = 0;
addstr((char *)tmpbuf);
tmp = tmpbuf;
}
}
Lowest = HighestScreen()+1;
Highest = LowestScreen()-1;
terminalCursorAddress = CorrectTerminalCursor();
if (ERR == move(ScreenLine(terminalCursorAddress),
ScreenLineOffset(terminalCursorAddress))) {
GoAway("move", terminalCursorAddress);
}
DoARefresh();
if (needToRing) {
StringToTerminal(bellSequence);
needToRing = 0;
}
EmptyTerminal(); /* move data along */
return;
}
/* TryToSend - send data out to user's terminal */
#if defined(NOT43)
int
#else /* defined(NOT43) */
void
#endif /* defined(NOT43) */
(*TryToSend)() = FastScreen;
\f
/*ARGSUSED*/
void
ScreenOIA(oia)
OIA *oia;
{
}
/* InitTerminal - called to initialize the screen, etc. */
void
InitTerminal()
{
#if defined(unix)
struct sgttyb ourttyb;
static int speeds[] = { 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800,
2400, 4800, 9600 };
#endif
extern void InitMapping();
InitMapping(); /* Go do mapping file (MAP3270) first */
if (!screenInitd) { /* not initialized */
#if defined(unix)
char KSEbuffer[2050];
char *lotsofspace = KSEbuffer;
extern int abort();
extern char *tgetstr();
#endif /* defined(unix) */
if (initscr() == ERR) { /* Initialize curses to get line size */
ExitString("InitTerminal: Error initializing curses", 1);
/*NOTREACHED*/
}
MaxNumberLines = LINES;
MaxNumberColumns = COLS;
ClearArray(Terminal);
terminalCursorAddress = SetBufferAddress(0,0);
#if defined(unix)
signal(SIGHUP, abort);
#endif
TryToSend = FastScreen;
#if defined(unix)
ioctl(1, TIOCGETP, (char *) &ourttyb);
if ((ourttyb.sg_ospeed < 0) || (ourttyb.sg_ospeed > B9600)) {
max_changes_before_poll = 1920;
} else {
max_changes_before_poll = speeds[ourttyb.sg_ospeed]/10;
if (max_changes_before_poll < 40) {
max_changes_before_poll = 40;
}
TryToSend = SlowScreen;
HaveInput = 1; /* get signals going */
}
#endif /* defined(unix) */
setcommandmode();
/*
* By now, initscr() (in curses) has been called (from telnet.c),
* and the screen has been initialized.
*/
#if defined(unix)
nonl();
/* the problem is that curses catches SIGTSTP to
* be nice, but it messes us up.
*/
signal(SIGTSTP, SIG_DFL);
if ((myKS = tgetstr("ks", &lotsofspace)) != 0) {
myKS = strsave(myKS);
StringToTerminal(myKS);
}
if ((myKE = tgetstr("ke", &lotsofspace)) != 0) {
myKE = strsave(myKE);
}
if (tgetstr("md", &lotsofspace) && tgetstr("me", &lotsofspace)) {
SO = strsave(tgetstr("md", &lotsofspace));
SE = strsave(tgetstr("me", &lotsofspace));
}
#endif
DoARefresh();
setconnmode();
if (VB && *VB) {
bellSequence = VB; /* use visual bell */
}
screenInitd = 1;
screenStopped = 0; /* Not stopped */
}
}
/* StopScreen - called when we are going away... */
void
StopScreen(doNewLine)
int doNewLine;
{
if (screenInitd && !screenStopped) {
move(NumberLines-1, 1);
standend();
inHighlightMode = 0;
DoARefresh();
setcommandmode();
endwin();
setconnmode();
#if defined(unix)
if (myKE) {
StringToTerminal(myKE);
}
#endif /* defined(unix) */
if (doNewLine) {
StringToTerminal("\r\n");
}
EmptyTerminal();
screenStopped = 1; /* This is stopped */
}
}
/* RefreshScreen - called to cause the screen to be refreshed */
void
RefreshScreen()
{
clearok(curscr, TRUE);
(*TryToSend)();
}
/* ConnectScreen - called to reconnect to the screen */
void
ConnectScreen()
{
if (screenInitd) {
#if defined(unix)
if (myKS) {
StringToTerminal(myKS);
}
#endif /* defined(unix) */
RefreshScreen();
(*TryToSend)();
screenStopped = 0;
}
}
/* LocalClearScreen() - clear the whole ball of wax, cheaply */
void
LocalClearScreen()
{
extern void Clear3270();
outputPurge(); /* flush all data to terminal */
clear(); /* clear in curses */
ClearArray(Terminal);
Clear3270();
Lowest = HighestScreen()+1; /* everything in sync... */
Highest = LowestScreen()+1;
}
void
BellOff()
{
if (bellwinup) {
delwin(bellwin);
bellwin = 0;
bellwinup = 0;
touchwin(stdscr);
DoARefresh();
}
}
void
RingBell(s)
char *s;
{
needToRing = 1;
if (s) {
int len = strlen(s);
if (len > COLS-2) {
len = COLS-2;
}
if ((bellwin = newwin(3, len+2, LINES/2, 0)) == NULL) {
OurExitString("Error from newwin in RingBell", 1);
}
werase(bellwin);
wstandout(bellwin);
box(bellwin, '|', '-');
if (wmove(bellwin, 1, 1) == ERR) {
OurExitString("Error from wmove in RingBell", 1);
}
while (len--) {
if (waddch(bellwin, *s++) == ERR) {
OurExitString("Error from waddch in RingBell", 1);
}
}
wstandend(bellwin);
if (wrefresh(bellwin) == ERR) {
OurExitString("Error from wrefresh in RingBell", 1);
}
bellwinup = 1;
}
}
\f
/* returns a 1 if no more output available (so, go ahead and block),
or a 0 if there is more output available (so, just poll the other
sources/destinations, don't block).
*/
int
DoTerminalOutput()
{
/* called just before a select to conserve IO to terminal */
if (!(screenInitd||screenStopped)) {
return 1; /* No output if not initialized */
}
if ((Lowest <= Highest) || needToRing ||
(terminalCursorAddress != CorrectTerminalCursor())) {
(*TryToSend)();
}
if (Lowest > Highest) {
return 1; /* no more output now */
} else {
return 0; /* more output for future */
}
}
\f
/*
* The following are defined to handle transparent data.
*/
void
TransStop()
{
#if defined(unix)
if (tcflag == 0) {
tcflag = -1;
(void) signal(SIGCHLD, SIG_DFL);
} else if (tcflag > 0) {
setcommandmode();
(void) close(tin);
(void) close(tout);
tin = savefd[0];
tout = savefd[1];
setconnmode();
tcflag = -1;
(void) signal(SIGCHLD, SIG_DFL);
}
#endif /* defined(unix) */
RefreshScreen();
}
void
TransOut(buffer, count, kind, control)
unsigned char *buffer;
int count;
int kind; /* 0 or 5 */
int control; /* To see if we are done */
{
#if defined(unix)
extern char *transcom;
int inpipefd[2], outpipefd[2];
void aborttc();
#endif /* defined(unix) */
while (DoTerminalOutput() == 0) {
#if defined(unix)
HaveInput = 0;
#endif /* defined(unix) */
}
#if defined(unix)
if (transcom && tcflag == -1) {
while (1) { /* go thru once */
if (pipe(outpipefd) < 0) {
break;
}
if (pipe(inpipefd) < 0) {
break;
}
if ((tcflag = fork()) == 0) {
(void) close(outpipefd[1]);
(void) close(0);
if (dup(outpipefd[0]) < 0) {
exit(1);
}
(void) close(outpipefd[0]);
(void) close(inpipefd[0]);
(void) close(1);
if (dup(inpipefd[1]) < 0) {
exit(1);
}
(void) close(inpipefd[1]);
if (execl("/bin/csh", "csh", "-c", transcom, (char *) 0)) {
exit(1);
}
}
(void) close(inpipefd[1]);
(void) close(outpipefd[0]);
savefd[0] = tin;
savefd[1] = tout;
setcommandmode();
tin = inpipefd[0];
tout = outpipefd[1];
(void) signal(SIGCHLD, (int (*)())aborttc);
setconnmode();
tcflag = 1;
break;
}
if (tcflag < 1) {
tcflag = 0;
}
}
#endif /* defined(unix) */
(void) DataToTerminal((char *)buffer, count);
if (control && (kind == 0)) { /* Send in AID byte */
SendToIBM();
} else {
extern void TransInput();
TransInput(1, kind); /* Go get some data */
}
}
#if defined(unix)
static void
aborttc()
{
setcommandmode();
(void) close(tin);
(void) close(tout);
tin = savefd[0];
tout = savefd[1];
setconnmode();
tcflag = 0;
}
#endif /* defined(unix) */
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.