pty library

[unix-history] / usr / src / libexec / telnetd / telnetd.c

diff --git a/usr/src/libexec/telnetd/telnetd.c b/usr/src/libexec/telnetd/telnetd.c
index 54b867e..b6a70d5 100644 (file)
--- a/usr/src/libexec/telnetd/telnetd.c
+++ b/usr/src/libexec/telnetd/telnetd.c
@@ -1,105 +1,233 @@
 /*
 /*

- * Copyright (c) 1983 Regents of the University of California.
- * All rights reserved.  The Berkeley software License Agreement
- * specifies the terms and conditions for redistribution.
+ * Copyright (c) 1989 Regents of the University of California.
+ * All rights reserved.
+ *
+ * %sccs.include.redist.c%

  */
 
 #ifndef lint
 char copyright[] =
  */
 
 #ifndef lint
 char copyright[] =

-"@(#) Copyright (c) 1983 Regents of the University of California.\n\
+"@(#) Copyright (c) 1989 Regents of the University of California.\n\

  All rights reserved.\n";
  All rights reserved.\n";

-#endif not lint
+#endif /* not lint */

 
 #ifndef lint
 
 #ifndef lint

-static char sccsid[] = "@(#)telnetd.c  5.11 (Berkeley) %G%";
-#endif not lint
+static char sccsid[] = "@(#)telnetd.c  5.46 (Berkeley) %G%";
+#endif /* not lint */

 
 

-/*
- * Stripped-down telnet server.
- */
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <sys/wait.h>
-#include <sys/file.h>
-#include <sys/stat.h>
-#include <sys/time.h>
-
-#include <netinet/in.h>
-
-#include <arpa/telnet.h>
-
-#include <stdio.h>
-#include <signal.h>
-#include <errno.h>
-#include <sgtty.h>
-#include <netdb.h>
-#include <syslog.h>
-
-#define        BELL    '\07'
-#define BANNER "\r\n\r\n4.3 BSD UNIX (%s)\r\n\r\r\n\r%s"
-
-char   hisopts[256];
-char   myopts[256];
-
-char   doopt[] = { IAC, DO, '%', 'c', 0 };
-char   dont[] = { IAC, DONT, '%', 'c', 0 };
-char   will[] = { IAC, WILL, '%', 'c', 0 };
-char   wont[] = { IAC, WONT, '%', 'c', 0 };
+#include "telnetd.h"

 
 /*
 
 /*

- * I/O data buffers, pointers, and counters.
+ * I/O data buffers,
+ * pointers, and counters.

  */
 char   ptyibuf[BUFSIZ], *ptyip = ptyibuf;
  */
 char   ptyibuf[BUFSIZ], *ptyip = ptyibuf;

-char   ptyobuf[BUFSIZ], *pfrontp = ptyobuf, *pbackp = ptyobuf;
-char   netibuf[BUFSIZ], *netip = netibuf;
-char   netobuf[BUFSIZ], *nfrontp = netobuf, *nbackp = netobuf;
-char   *neturg = 0;            /* one past last bye of urgent data */
-int    pcc, ncc;
-
-int    pty, net;
-int    inter;
-extern char **environ;
-extern int errno;
-char   *line;
-int    SYNCHing = 0;           /* we are in TELNET SYNCH mode */
-/*
- * The following are some clocks used to decide how to interpret
- * the relationship between various variables.
- */
+char   ptyibuf2[BUFSIZ];
+
+#ifdef CRAY
+int    hostinfo = 1;                   /* do we print login banner? */
+#endif
+
+#ifdef CRAY
+extern int      newmap; /* nonzero if \n maps to ^M^J */
+int    lowpty = 0, highpty;    /* low, high pty numbers */
+#endif /* CRAY */
+
+int debug = 0;
+char *progname;
+
+#if    defined(NEED_GETTOS)
+struct tosent {
+       char    *t_name;        /* name */
+       char    **t_aliases;    /* alias list */
+       char    *t_proto;       /* protocol */
+       int     t_tos;          /* Type Of Service bits */
+};
+
+struct tosent *
+gettosbyname(name, proto)
+char *name, *proto;
+{
+       static struct tosent te;
+       static char *aliasp = 0;
+
+       te.t_name = name;
+       te.t_aliases = &aliasp;
+       te.t_proto = proto;
+       te.t_tos = 020; /* Low Delay bit */
+       return(&te);
+}
+#endif

 
 

-struct {
-    int
-       system,                 /* what the current time is */
-       echotoggle,             /* last time user entered echo character */
-       modenegotiated,         /* last time operating mode negotiated */
-       didnetreceive,          /* last time we read data from network */
-       gotDM;                  /* when did we last see a data mark */
-} clocks;
-
-#define        settimer(x)     clocks.x = clocks.system++
-\f

 main(argc, argv)
        char *argv[];
 {
        struct sockaddr_in from;
        int on = 1, fromlen;
 main(argc, argv)
        char *argv[];
 {
        struct sockaddr_in from;
        int on = 1, fromlen;

+#if    defined(HAS_IP_TOS) || defined(NEED_GETTOS)
+       struct tosent *tp;
+#endif /* defined(HAS_IP_TOS) || defined(NEED_GETTOS) */
+
+       pfrontp = pbackp = ptyobuf;
+       netip = netibuf;
+       nfrontp = nbackp = netobuf;
+
+       progname = *argv;
+
+#ifdef CRAY
+       /*
+        * Get number of pty's before trying to process options,
+        * which may include changing pty range.
+        */
+       highpty = getnpty();
+#endif /* CRAY */
+
+top:
+       argc--, argv++;
+
+       if (argc > 0 && strcmp(*argv, "-debug") == 0) {
+               debug++;
+               goto top;
+       }
+
+#ifdef LINEMODE
+       if (argc > 0 && !strcmp(*argv, "-l")) {
+               alwayslinemode = 1;
+               goto top;
+       }
+#endif /* LINEMODE */
+
+#ifdef CRAY
+       if (argc > 0 && !strcmp(*argv, "-h")) {
+               hostinfo = 0;
+               goto top;
+       }

 
 

-#if    defined(DEBUG)
-       {
+       if (argc > 0 && !strncmp(*argv, "-r", 2)) {
+               char *strchr();
+               char *c;
+
+               /*
+                * Allow the specification of alterations to the pty search
+                * range.  It is legal to specify only one, and not change the
+                * other from its default.
+                */
+               *argv += 2;
+               if (**argv == '\0' && argc)
+                       argv++, argc--;
+               c = strchr(*argv, '-');
+               if (c) {
+                       *c++ = '\0';
+                       highpty = atoi(c);
+               }
+               if (**argv != '\0')
+                       lowpty = atoi(*argv);
+               if ((lowpty > highpty) || (lowpty < 0) || (highpty > 32767)) {
+                       usage();
+                       /* NOT REACHED */
+               }
+               goto top;
+       }
+# ifdef        NEWINIT
+       if (argc > 0 && !strncmp(*argv, "-I", 2)) {
+               extern char *gen_id;
+
+               *argv += 2;
+               if (**argv == '\0') {
+                       if (argc < 2) {
+                               usage();
+                               /* NOT REACHED */
+                       }
+                       argv++, argc--;
+                       if (**argv == '\0') {
+                               usage();
+                               /* NOT REACHED */
+                       }
+               }
+               gen_id = *argv;
+               goto top;
+       }
+# endif        /* NEWINIT */
+#endif /* CRAY */
+
+#ifdef DIAGNOSTICS
+       /*
+        * Check for desired diagnostics capabilities.
+        */
+       if (argc > 0 && !strncmp(*argv, "-D", 2)) {
+               *argv += 2;
+               if (**argv == '\0') {
+                       if (argc < 2) {
+                               usage();
+                               /* NOT REACHED */
+                       }
+                       argv++, argc--;
+                       if (**argv == '\0') {
+                               usage();
+                               /* NOT REACHED */
+                       }
+               }
+               if (!strcmp(*argv, "report")) {
+                       diagnostic |= TD_REPORT|TD_OPTIONS;
+               } else if (!strcmp(*argv, "exercise")) {
+                       diagnostic |= TD_EXERCISE;
+               } else if (!strcmp(*argv, "netdata")) {
+                       diagnostic |= TD_NETDATA;
+               } else if (!strcmp(*argv, "ptydata")) {
+                       diagnostic |= TD_PTYDATA;
+               } else if (!strcmp(*argv, "options")) {
+                       diagnostic |= TD_OPTIONS;
+               } else {
+                       usage();
+                       /* NOT REACHED */
+               }
+               goto top;
+       }
+#endif /* DIAGNOSTICS */
+
+#ifdef BFTPDAEMON
+       /*
+        * Check for bftp daemon
+        */
+       if (argc > 0 && !strncmp(*argv, "-B", 2)) {
+               bftpd++;
+               goto top;
+       }
+#endif /* BFTPDAEMON */
+
+       if (argc > 0 && **argv == '-') {
+               fprintf(stderr, "telnetd: %s: unknown option\n", *argv+1);
+               usage();
+               /* NOT REACHED */
+       }
+
+       if (debug) {

            int s, ns, foo;
            struct servent *sp;
            static struct sockaddr_in sin = { AF_INET };
 
            int s, ns, foo;
            struct servent *sp;
            static struct sockaddr_in sin = { AF_INET };
 

-           sp = getservbyname("telnet", "tcp");
-           if (sp == 0) {
+           if (argc > 1) {
+               usage();
+               /* NOT REACHED */
+           } else if (argc == 1) {
+                   if (sp = getservbyname(*argv, "tcp")) {
+                       sin.sin_port = sp->s_port;
+                   } else {
+                       sin.sin_port = atoi(*argv);
+                       if ((int)sin.sin_port <= 0) {
+                           fprintf(stderr, "telnetd: %s: bad port #\n", *argv);
+                           usage();
+                           /* NOT REACHED */
+                       }
+                       sin.sin_port = htons((u_short)sin.sin_port);
+                  }
+           } else {
+               sp = getservbyname("telnet", "tcp");
+               if (sp == 0) {

                    fprintf(stderr, "telnetd: tcp/telnet: unknown service\n");
                    exit(1);
                    fprintf(stderr, "telnetd: tcp/telnet: unknown service\n");
                    exit(1);

-           }
-           sin.sin_port = sp->s_port;
-           argc--, argv++;
-           if (argc > 0) {
-                   sin.sin_port = atoi(*argv);
-                   sin.sin_port = htons((u_short)sin.sin_port);
+               }
+               sin.sin_port = sp->s_port;

            }
 
            s = socket(AF_INET, SOCK_STREAM, 0);
            }
 
            s = socket(AF_INET, SOCK_STREAM, 0);


@@ -107,7 +235,8 @@ main(argc, argv)
                    perror("telnetd: socket");;
                    exit(1);
            }
                    perror("telnetd: socket");;
                    exit(1);
            }

-           if (bind(s, &sin, sizeof sin) < 0) {
+           (void) setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
+           if (bind(s, (struct sockaddr *)&sin, sizeof sin) < 0) {

                perror("bind");
                exit(1);
            }
                perror("bind");
                exit(1);
            }


@@ -116,179 +245,501 @@ main(argc, argv)
                exit(1);
            }
            foo = sizeof sin;
                exit(1);
            }
            foo = sizeof sin;

-           ns = accept(s, &sin, &foo);
+           ns = accept(s, (struct sockaddr *)&sin, &foo);

            if (ns < 0) {
                perror("accept");
                exit(1);
            }
            if (ns < 0) {
                perror("accept");
                exit(1);
            }

-           dup2(ns, 0);
-           close(s);
+           (void) dup2(ns, 0);
+           (void) close(ns);
+           (void) close(s);
+       } else if (argc > 0) {
+               usage();
+               /* NOT REACHED */

        }
        }

-#endif /* defined(DEBUG) */
+

        openlog("telnetd", LOG_PID | LOG_ODELAY, LOG_DAEMON);
        fromlen = sizeof (from);
        openlog("telnetd", LOG_PID | LOG_ODELAY, LOG_DAEMON);
        fromlen = sizeof (from);

-       if (getpeername(0, &from, &fromlen) < 0) {
-               fprintf(stderr, "%s: ", argv[0]);
+       if (getpeername(0, (struct sockaddr *)&from, &fromlen) < 0) {
+               fprintf(stderr, "%s: ", progname);

                perror("getpeername");
                _exit(1);
        }
        if (setsockopt(0, SOL_SOCKET, SO_KEEPALIVE, &on, sizeof (on)) < 0) {
                syslog(LOG_WARNING, "setsockopt (SO_KEEPALIVE): %m");
        }
                perror("getpeername");
                _exit(1);
        }
        if (setsockopt(0, SOL_SOCKET, SO_KEEPALIVE, &on, sizeof (on)) < 0) {
                syslog(LOG_WARNING, "setsockopt (SO_KEEPALIVE): %m");
        }

-       doit(0, &from);
+
+#if    defined(HAS_IP_TOS) || defined(NEED_GETTOS)
+       if ((tp = gettosbyname("telnet", "tcp")) &&
+           (setsockopt(0, IPPROTO_IP, IP_TOS, &tp->t_tos, sizeof(int)) < 0))
+               syslog(LOG_WARNING, "setsockopt (IP_TOS): %m");
+#endif /* defined(HAS_IP_TOS) || defined(NEED_GETTOS) */
+       net = 0;
+       doit(&from);
+       /* NOTREACHED */
+}  /* end of main */
+
+usage()
+{
+       fprintf(stderr, "Usage: telnetd [-debug] [-h]");
+#ifdef NEWINIT
+       fprintf(stderr, " [-Iinitid]");
+#endif /* NEWINIT */
+#ifdef DIAGNOSTICS
+       fprintf(stderr, " [-D (options|report|exercise|netdata|ptydata)]");
+#endif /* DIAGNOSTICS */
+#ifdef LINEMODE
+       fprintf(stderr, " [-l]");
+#endif
+#ifdef CRAY
+       fprintf(stderr, " [-r[lowpty]-[highpty]]");
+#endif
+#ifdef BFTPDAEMON
+       fprintf(stderr, " [-B]");
+#endif /* BFTPDAEMON */
+       fprintf(stderr, " [port]\n");
+       exit(1);

 }
 
 }
 

-char   *envinit[] = { "TERM=network", 0 };
-int    cleanup();
+void   cleanup();

 
 /*
 
 /*

- * Get a pty, scan input lines.
+ * getterminaltype
+ *
+ *     Ask the other end to send along its terminal type and speed.
+ * Output is the variable terminaltype filled in.

  */
  */

-doit(f, who)
-       int f;
-       struct sockaddr_in *who;
+static char ttytype_sbbuf[] = { IAC, SB, TELOPT_TTYPE, TELQUAL_SEND, IAC, SE };
+void
+getterminaltype()

 {
 {

-       char *host, *inet_ntoa();
-       int i, p, t;
-       struct sgttyb b;
-       struct hostent *hp;
-       char c;
+    void ttloop();
+
+    settimer(baseline);
+    send_do(TELOPT_TTYPE, 1);
+    send_do(TELOPT_TSPEED, 1);
+    send_do(TELOPT_XDISPLOC, 1);
+    send_do(TELOPT_ENVIRON, 1);
+    while (his_will_wont_is_changing(TELOPT_TTYPE) ||
+          his_will_wont_is_changing(TELOPT_TSPEED) ||
+          his_will_wont_is_changing(TELOPT_XDISPLOC) ||
+          his_will_wont_is_changing(TELOPT_ENVIRON)) {
+       ttloop();
+    }
+    if (his_state_is_will(TELOPT_TSPEED)) {
+       static char sbbuf[] = { IAC, SB, TELOPT_TSPEED, TELQUAL_SEND, IAC, SE };
+
+       bcopy(sbbuf, nfrontp, sizeof sbbuf);
+       nfrontp += sizeof sbbuf;
+    }
+    if (his_state_is_will(TELOPT_XDISPLOC)) {
+       static char sbbuf[] = { IAC, SB, TELOPT_XDISPLOC, TELQUAL_SEND, IAC, SE };
+
+       bcopy(sbbuf, nfrontp, sizeof sbbuf);
+       nfrontp += sizeof sbbuf;
+    }
+    if (his_state_is_will(TELOPT_ENVIRON)) {
+       static char sbbuf[] = { IAC, SB, TELOPT_ENVIRON, TELQUAL_SEND, IAC, SE };
+
+       bcopy(sbbuf, nfrontp, sizeof sbbuf);
+       nfrontp += sizeof sbbuf;
+    }
+    if (his_state_is_will(TELOPT_TTYPE)) {
+
+       bcopy(ttytype_sbbuf, nfrontp, sizeof ttytype_sbbuf);
+       nfrontp += sizeof ttytype_sbbuf;
+    }
+    if (his_state_is_will(TELOPT_TSPEED)) {
+       while (sequenceIs(tspeedsubopt, baseline))
+           ttloop();
+    }
+    if (his_state_is_will(TELOPT_XDISPLOC)) {
+       while (sequenceIs(xdisplocsubopt, baseline))
+           ttloop();
+    }
+    if (his_state_is_will(TELOPT_ENVIRON)) {
+       while (sequenceIs(environsubopt, baseline))
+           ttloop();
+    }
+    if (his_state_is_will(TELOPT_TTYPE)) {
+       char first[256], last[256];

 
 

-       for (c = 'p'; c <= 's'; c++) {
-               struct stat stb;
+       while (sequenceIs(ttypesubopt, baseline))
+           ttloop();

 
 

-               line = "/dev/ptyXX";
-               line[strlen("/dev/pty")] = c;
-               line[strlen("/dev/ptyp")] = '0';
-               if (stat(line, &stb) < 0)
+       /*
+        * If the other side has already disabled the option, then
+        * we have to just go with what we (might) have already gotten.
+        */
+       if (his_state_is_will(TELOPT_TTYPE) && !terminaltypeok(terminaltype)) {
+           (void) strncpy(first, terminaltype, sizeof(first));
+           for(;;) {
+               /*
+                * Save the unknown name, and request the next name.
+                */
+               (void) strncpy(last, terminaltype, sizeof(last));
+               _gettermname();
+               if (terminaltypeok(terminaltype))
+                   break;
+               if ((strncmp(last, terminaltype, sizeof(last)) == 0) ||
+                   his_state_is_wont(TELOPT_TTYPE)) {
+                   /*
+                    * We've hit the end.  If this is the same as
+                    * the first name, just go with it.
+                    */
+                   if (strncmp(first, terminaltype, sizeof(first) == 0))

                        break;
                        break;

-               for (i = 0; i < 16; i++) {
-                       line[strlen("/dev/ptyp")] = "0123456789abcdef"[i];
-                       p = open(line, 2);
-                       if (p > 0)
-                               goto gotpty;
+                   /*
+                    * Get the terminal name one more time, so that
+                    * RFC1091 compliant telnets will cycle back to
+                    * the start of the list.
+                    */
+                    _gettermname();
+                   if (strncmp(first, terminaltype, sizeof(first) != 0))
+                       (void) strncpy(terminaltype, first, sizeof(first));
+                   break;

                }
                }

+           }

        }
        }

-       fatal(f, "All network ports in use");
-       /*NOTREACHED*/
-gotpty:
-       dup2(f, 0);
-       line[strlen("/dev/")] = 't';
-       t = open("/dev/tty", O_RDWR);
-       if (t >= 0) {
-               ioctl(t, TIOCNOTTY, 0);
-               close(t);
-       }
-       t = open(line, O_RDWR);
-       if (t < 0)
-               fatalperror(f, line, errno);
-       ioctl(t, TIOCGETP, &b);
-       b.sg_flags = CRMOD|XTABS|ANYP;
-       ioctl(t, TIOCSETP, &b);
-       ioctl(p, TIOCGETP, &b);
-       b.sg_flags &= ~ECHO;
-       ioctl(p, TIOCSETP, &b);
-       hp = gethostbyaddr(&who->sin_addr, sizeof (struct in_addr),
-               who->sin_family);
-       if (hp)
-               host = hp->h_name;
-       else
-               host = inet_ntoa(who->sin_addr);
-       if ((i = fork()) < 0)
-               fatalperror(f, "fork", errno);
-       if (i)
-               telnet(f, p);
-       close(f);
-       close(p);
-       dup2(t, 0);
-       dup2(t, 1);
-       dup2(t, 2);
-       close(t);
-       environ = envinit;
-       execl("/bin/login", "login", "-h", host, 0);
-       fatalperror(f, "/bin/login", errno);
-       /*NOTREACHED*/
-}
+    }
+}  /* end of getterminaltype */

 
 

-fatal(f, msg)
-       int f;
-       char *msg;
+_gettermname()

 {
 {

-       char buf[BUFSIZ];
-
-       (void) sprintf(buf, "telnetd: %s.\r\n", msg);
-       (void) write(f, buf, strlen(buf));
-       exit(1);
+    /*
+     * If the client turned off the option,
+     * we can't send another request, so we
+     * just return.
+     */
+    if (his_state_is_wont(TELOPT_TTYPE))
+       return;
+    settimer(baseline);
+    bcopy(ttytype_sbbuf, nfrontp, sizeof ttytype_sbbuf);
+    nfrontp += sizeof ttytype_sbbuf;
+    while (sequenceIs(ttypesubopt, baseline))
+       ttloop();

 }
 
 }
 

-fatalperror(f, msg, errno)
-       int f;
-       char *msg;
-       int errno;
+terminaltypeok(s)
+char *s;

 {
 {

-       char buf[BUFSIZ];
-       extern char *sys_errlist[];
-
-       (void) sprintf(buf, "%s: %s\r\n", msg, sys_errlist[errno]);
-       fatal(f, buf);
+    char buf[1024];
+
+    if (terminaltype == NULL)
+       return(1);
+
+    /*
+     * tgetent() will return 1 if the type is known, and
+     * 0 if it is not known.  If it returns -1, it couldn't
+     * open the database.  But if we can't open the database,
+     * it won't help to say we failed, because we won't be
+     * able to verify anything else.  So, we treat -1 like 1.
+     */
+    if (tgetent(buf, s) == 0)
+       return(0);
+    return(1);

 }
 
 }
 

-

 /*
 /*

- * Check a descriptor to see if out of band data exists on it.
+ * Get a pty, scan input lines.

  */
  */

+doit(who)
+       struct sockaddr_in *who;
+{
+       char *host, *inet_ntoa();
+       int t;
+       struct hostent *hp;
+#if BSD > 43
+       extern char *line;

 
 

+       if (openpty(&pty, &t, line, NULL, NULL) == -1)
+               fatal(net, "All network ports in use");
+       init_termbuf();
+#else
+       
+       /*
+        * Find an available pty to use.
+        */
+       pty = getpty();
+       if (pty < 0)
+               fatal(net, "All network ports in use");

 
 

-stilloob(s)
-int    s;              /* socket number */
-{
-    static struct timeval timeout = { 0 };
-    fd_set     excepts;
-    int value;
-
-    do {
-       FD_ZERO(&excepts);
-       FD_SET(s, &excepts);
-       value = select(s+1, (fd_set *)0, (fd_set *)0, &excepts, &timeout);
-    } while ((value == -1) && (errno = EINTR));
-
-    if (value < 0) {
-       fatalperror(pty, "select", errno);
-    }
-    if (FD_ISSET(s, &excepts)) {
-       return 1;
-    } else {
-       return 0;
-    }
-}
-\f
+       t = getptyslave();
+#endif
+
+       /* get name of connected client */
+       hp = gethostbyaddr((char *)&who->sin_addr, sizeof (struct in_addr),
+               who->sin_family);
+       if (hp)
+               host = hp->h_name;
+       else
+               host = inet_ntoa(who->sin_addr);
+
+       init_env();
+       /*
+        * get terminal type.
+        */
+       getterminaltype();
+       setenv("TERM", terminaltype ? terminaltype : "network", 1);
+
+       /*
+        * Start up the login process on the slave side of the terminal
+        */
+       startslave(t, host);
+
+       telnet(net, pty);  /* begin server processing */
+       /*NOTREACHED*/
+}  /* end of doit */
+
+#ifndef        MAXHOSTNAMELEN
+#define        MAXHOSTNAMELEN 64
+#endif MAXHOSTNAMELEN

 /*
  * Main loop.  Select from pty and network, and
  * hand data to telnet receiver finite state machine.
  */
 telnet(f, p)
 /*
  * Main loop.  Select from pty and network, and
  * hand data to telnet receiver finite state machine.
  */
 telnet(f, p)

+int f, p;

 {
        int on = 1;
 {
        int on = 1;

-       char hostname[32];
+       char hostname[MAXHOSTNAMELEN];
+#if    defined(CRAY2) && defined(UNICOS5)
+       int termstat();
+       int interrupt(), sendbrk();
+#endif
+#define        TABBUFSIZ       512
+       char    defent[TABBUFSIZ];
+       char    defstrs[TABBUFSIZ];
+#undef TABBUFSIZ
+       char *HE;
+       char *HN;
+       char *IM;
+       void netflush();
+       
+       /*
+        * Initialize the slc mapping table.
+        */
+       get_slc_defaults();
+
+       /*
+        * Do some tests where it is desireable to wait for a response.
+        * Rather than doing them slowly, one at a time, do them all
+        * at once.
+        */
+       if (my_state_is_wont(TELOPT_SGA))
+               send_will(TELOPT_SGA, 1);
+       /*
+        * Is the client side a 4.2 (NOT 4.3) system?  We need to know this
+        * because 4.2 clients are unable to deal with TCP urgent data.
+        *
+        * To find out, we send out a "DO ECHO".  If the remote system
+        * answers "WILL ECHO" it is probably a 4.2 client, and we note
+        * that fact ("WILL ECHO" ==> that the client will echo what
+        * WE, the server, sends it; it does NOT mean that the client will
+        * echo the terminal input).
+        */
+       send_do(TELOPT_ECHO, 1);

 
 

-       net = f, pty = p;
-       ioctl(f, FIONBIO, &on);
-       ioctl(p, FIONBIO, &on);
-       signal(SIGTSTP, SIG_IGN);
-       signal(SIGCHLD, cleanup);
-       setpgrp(0, 0);
+#ifdef LINEMODE
+       if (his_state_is_wont(TELOPT_LINEMODE)) {
+               /* Query the peer for linemode support by trying to negotiate
+                * the linemode option.
+                */
+               linemode = 0;
+               editmode = 0;
+               send_do(TELOPT_LINEMODE, 1);  /* send do linemode */
+       }
+#endif /* LINEMODE */
+
+       /*
+        * Send along a couple of other options that we wish to negotiate.
+        */
+       send_do(TELOPT_NAWS, 1);
+       send_will(TELOPT_STATUS, 1);
+       flowmode = 1;  /* default flow control state */
+       send_do(TELOPT_LFLOW, 1);

 
        /*
 
        /*

-        * Request to do remote echo and to suppress go ahead.
+        * Spin, waiting for a response from the DO ECHO.  However,
+        * some REALLY DUMB telnets out there might not respond
+        * to the DO ECHO.  So, we spin looking for NAWS, (most dumb
+        * telnets so far seem to respond with WONT for a DO that
+        * they don't understand...) because by the time we get the
+        * response, it will already have processed the DO ECHO.
+        * Kludge upon kludge.

         */
         */

-       dooption(TELOPT_ECHO);
-       dooption(TELOPT_SGA);
+       while (his_will_wont_is_changing(TELOPT_NAWS))
+               ttloop();
+
+       /*
+        * But...
+        * The client might have sent a WILL NAWS as part of its
+        * startup code; if so, we'll be here before we get the
+        * response to the DO ECHO.  We'll make the assumption
+        * that any implementation that understands about NAWS
+        * is a modern enough implementation that it will respond
+        * to our DO ECHO request; hence we'll do another spin
+        * waiting for the ECHO option to settle down, which is
+        * what we wanted to do in the first place...
+        */
+       if (his_want_state_is_will(TELOPT_ECHO) &&
+           his_state_is_will(TELOPT_NAWS)) {
+               while (his_will_wont_is_changing(TELOPT_ECHO))
+                       ttloop();
+       }
+       /*
+        * On the off chance that the telnet client is broken and does not
+        * respond to the DO ECHO we sent, (after all, we did send the
+        * DO NAWS negotiation after the DO ECHO, and we won't get here
+        * until a response to the DO NAWS comes back) simulate the
+        * receipt of a will echo.  This will also send a WONT ECHO
+        * to the client, since we assume that the client failed to
+        * respond because it believes that it is already in DO ECHO
+        * mode, which we do not want.
+        */
+       if (his_want_state_is_will(TELOPT_ECHO)) {
+#ifdef DIAGNOSTICS
+               if (diagnostic & TD_OPTIONS) {
+                       sprintf(nfrontp, "td: simulating recv\r\n");
+                       nfrontp += strlen(nfrontp);
+               }
+#endif /* DIAGNOSTICS */
+               willoption(TELOPT_ECHO);
+       }
+
+       /*
+        * Finally, to clean things up, we turn on our echo.  This
+        * will break stupid 4.2 telnets out of local terminal echo.
+        */
+
+       if (my_state_is_wont(TELOPT_ECHO))
+               send_will(TELOPT_ECHO, 1);
+
+       /*
+        * Turn on packet mode, and default to line at at time mode.
+        */
+       (void) ioctl(p, TIOCPKT, (char *)&on);
+#ifdef LINEMODE
+       tty_setlinemode(1);
+
+# ifdef        KLUDGELINEMODE
+       /*
+        * Continuing line mode support.  If client does not support
+        * real linemode, attempt to negotiate kludge linemode by sending
+        * the do timing mark sequence.
+        */
+       if (lmodetype < REAL_LINEMODE)
+               send_do(TELOPT_TM, 1);
+# endif        /* KLUDGELINEMODE */
+#endif /* LINEMODE */
+
+       /*
+        * Call telrcv() once to pick up anything received during
+        * terminal type negotiation, 4.2/4.3 determination, and
+        * linemode negotiation.
+        */
+       telrcv();
+
+       (void) ioctl(f, FIONBIO, (char *)&on);
+       (void) ioctl(p, FIONBIO, (char *)&on);
+#if    defined(CRAY2) && defined(UNICOS5)
+       init_termdriver(f, p, interrupt, sendbrk);
+#endif
+
+#if    defined(SO_OOBINLINE)
+       (void) setsockopt(net, SOL_SOCKET, SO_OOBINLINE, &on, sizeof on);
+#endif /* defined(SO_OOBINLINE) */
+
+#ifdef SIGTSTP
+       (void) signal(SIGTSTP, SIG_IGN);
+#endif
+#ifdef SIGTTOU
+       /*
+        * Ignoring SIGTTOU keeps the kernel from blocking us
+        * in ttioct() in /sys/tty.c.
+        */
+       (void) signal(SIGTTOU, SIG_IGN);
+#endif
+
+       (void) signal(SIGCHLD, cleanup);
+
+#if    defined(CRAY2) && defined(UNICOS5)
+       /*
+        * Cray-2 will send a signal when pty modes are changed by slave
+        * side.  Set up signal handler now.
+        */
+       if ((int)signal(SIGUSR1, termstat) < 0)
+               perror("signal");
+       else if (ioctl(p, TCSIGME, (char *)SIGUSR1) < 0)
+               perror("ioctl:TCSIGME");
+       /*
+        * Make processing loop check terminal characteristics early on.
+        */
+       termstat();
+#endif
+
+#ifdef NO_SETSID
+       (void) setpgrp(0, 0);
+#else
+       (void) setsid();
+#endif
+#if    defined(TIOCSCTTY) && defined(CRAY)
+       ioctl(p, TIOCSCTTY, 0);
+#endif
+

        /*
         * Show banner that getty never gave.
        /*
         * Show banner that getty never gave.

+        *
+        * We put the banner in the pty input buffer.  This way, it
+        * gets carriage return null processing, etc., just like all
+        * other pty --> client data.

         */
         */

-       gethostname(hostname, sizeof (hostname));
-       sprintf(nfrontp, BANNER, hostname, "");
-       nfrontp += strlen(nfrontp);
+
+       (void) gethostname(hostname, sizeof (hostname));
+
+       if (getent(defent, "default") == 1) {
+               char *getstr();
+               char *cp=defstrs;
+
+               HE = getstr("he", &cp);
+               HN = getstr("hn", &cp);
+               IM = getstr("im", &cp);
+               if (HN && *HN)
+                       (void) strcpy(hostname, HN);
+               if (IM == 0)
+                       IM = "";
+       } else {
+#ifdef CRAY
+               if (hostinfo == 0)
+                       IM = 0;
+               else
+#endif
+                       IM = DEFAULT_IM;
+               HE = 0;
+       }
+       edithost(HE, hostname);
+       if (IM && *IM)
+               putf(IM, ptyibuf2);
+
+       if (pcc)
+               (void) strncat(ptyibuf2, ptyip, pcc+1);
+       ptyip = ptyibuf2;
+       pcc = strlen(ptyip);
+#ifdef LINEMODE
+       /*
+        * Last check to make sure all our states are correct.
+        */
+       init_termbuf();
+       localstat();
+#endif /* LINEMODE */
+
+#ifdef DIAGNOSTICS
+       if (diagnostic & TD_REPORT) {
+               sprintf(nfrontp, "td: Entering processing loop\r\n");
+               nfrontp += strlen(nfrontp);
+       }
+#endif /* DIAGNOSTICS */
+

        for (;;) {
                fd_set ibits, obits, xbits;
                register int c;
        for (;;) {
                fd_set ibits, obits, xbits;
                register int c;


@@ -296,6 +747,10 @@ telnet(f, p)
                if (ncc < 0 && pcc < 0)
                        break;
 
                if (ncc < 0 && pcc < 0)
                        break;
 

+#if    defined(CRAY2) && defined(UNICOS5)
+               if (needtermstat)
+                       _termstat();
+#endif /* defined(CRAY2) && defined(UNICOS5) */

                FD_ZERO(&ibits);
                FD_ZERO(&obits);
                FD_ZERO(&xbits);
                FD_ZERO(&ibits);
                FD_ZERO(&obits);
                FD_ZERO(&xbits);


@@ -338,9 +793,9 @@ telnet(f, p)
                 * Something to read from the network...
                 */
                if (FD_ISSET(net, &ibits)) {
                 * Something to read from the network...
                 */
                if (FD_ISSET(net, &ibits)) {

-#if    !defined(IOCTL_TO_DO_UNIX_OOB_IN_TCP_WAY)
+#if    !defined(SO_OOBINLINE)

                        /*
                        /*

-                        * In 4.2 (and some early 4.3) systems, the
+                        * In 4.2 (and 4.3 beta) systems, the

                         * OOB indication and data handling in the kernel
                         * is such that if two separate TCP Urgent requests
                         * come in, one byte of TCP data will be overlaid.
                         * OOB indication and data handling in the kernel
                         * is such that if two separate TCP Urgent requests
                         * come in, one byte of TCP data will be overlaid.


@@ -376,12 +831,12 @@ telnet(f, p)
                    if (SYNCHing) {
                        int atmark;
 
                    if (SYNCHing) {
                        int atmark;
 

-                       ioctl(net, SIOCATMARK, (char *)&atmark);
+                       (void) ioctl(net, SIOCATMARK, (char *)&atmark);

                        if (atmark) {
                            ncc = recv(net, netibuf, sizeof (netibuf), MSG_OOB);
                            if ((ncc == -1) && (errno == EINVAL)) {
                                ncc = read(net, netibuf, sizeof (netibuf));
                        if (atmark) {
                            ncc = recv(net, netibuf, sizeof (netibuf), MSG_OOB);
                            if ((ncc == -1) && (errno == EINVAL)) {
                                ncc = read(net, netibuf, sizeof (netibuf));

-                               if (clocks.didnetreceive < clocks.gotDM) {
+                               if (sequenceIs(didnetreceive, gotDM)) {

                                    SYNCHing = stilloob(net);
                                }
                            }
                                    SYNCHing = stilloob(net);
                                }
                            }


@@ -392,9 +847,9 @@ telnet(f, p)
                        ncc = read(net, netibuf, sizeof (netibuf));
                    }
                    settimer(didnetreceive);
                        ncc = read(net, netibuf, sizeof (netibuf));
                    }
                    settimer(didnetreceive);

-#else  /* !defined(IOCTL_TO_DO_UNIX_OOB_IN_TCP_WAY) */
+#else  /* !defined(SO_OOBINLINE)) */

                    ncc = read(net, netibuf, sizeof (netibuf));
                    ncc = read(net, netibuf, sizeof (netibuf));

-#endif /* !defined(IOCTL_TO_DO_UNIX_OOB_IN_TCP_WAY) */
+#endif /* !defined(SO_OOBINLINE)) */

                    if (ncc < 0 && errno == EWOULDBLOCK)
                        ncc = 0;
                    else {
                    if (ncc < 0 && errno == EWOULDBLOCK)
                        ncc = 0;
                    else {


@@ -403,6 +858,15 @@ telnet(f, p)
                        }
                        netip = netibuf;
                    }
                        }
                        netip = netibuf;
                    }

+#ifdef DIAGNOSTICS
+                   if (diagnostic & (TD_REPORT | TD_NETDATA)) {
+                           sprintf(nfrontp, "td: netread %d chars\r\n", ncc);
+                           nfrontp += strlen(nfrontp);
+                   }
+                   if (diagnostic & TD_NETDATA) {
+                           printdata("nd", netip, ncc);
+                   }
+#endif /* DIAGNOSTICS */

                }
 
                /*
                }
 
                /*


@@ -415,7 +879,54 @@ telnet(f, p)
                        else {
                                if (pcc <= 0)
                                        break;
                        else {
                                if (pcc <= 0)
                                        break;

-                               ptyip = ptyibuf;
+#if    !defined(CRAY2) || !defined(UNICOS5)
+#ifdef LINEMODE
+                               /*
+                                * If ioctl from pty, pass it through net
+                                */
+                               if (ptyibuf[0] & TIOCPKT_IOCTL) {
+                                       copy_termbuf(ptyibuf+1, pcc-1);
+                                       localstat();
+                                       pcc = 1;
+                               }
+#endif LINEMODE
+                               if (ptyibuf[0] & TIOCPKT_FLUSHWRITE) {
+                                       netclear();     /* clear buffer back */
+#ifdef notdef
+                                       /*
+                                        * We really should have this in, but
+                                        * there are client telnets on some
+                                        * operating systems get screwed up
+                                        * royally if we send them urgent
+                                        * mode data.  So, for now, we'll not
+                                        * do this...
+                                        */
+                                       *nfrontp++ = IAC;
+                                       *nfrontp++ = DM;
+                                       neturg = nfrontp-1; /* off by one XXX */
+#endif
+                               }
+                               if (his_state_is_will(TELOPT_LFLOW) &&
+                                   (ptyibuf[0] &
+                                    (TIOCPKT_NOSTOP|TIOCPKT_DOSTOP))) {
+                                       (void) sprintf(nfrontp, "%c%c%c%c%c%c",
+                                           IAC, SB, TELOPT_LFLOW,
+                                           ptyibuf[0] & TIOCPKT_DOSTOP ? 1 : 0,
+                                           IAC, SE);
+                                       nfrontp += 6;
+                               }
+                               pcc--;
+                               ptyip = ptyibuf+1;
+#else  /* defined(CRAY2) && defined(UNICOS5) */
+                               if (!uselinemode) {
+                                       unpcc = pcc;
+                                       unptyip = ptyibuf;
+                                       pcc = term_output(&unptyip, ptyibuf2,
+                                                               &unpcc, BUFSIZ);
+                                       ptyip = ptyibuf2;
+                               } else
+                                       ptyip = ptyibuf;
+#endif /* defined(CRAY2) && defined(UNICOS5) */

                        }
                }
 
                        }
                }
 


@@ -425,8 +936,13 @@ telnet(f, p)
                        c = *ptyip++ & 0377, pcc--;
                        if (c == IAC)
                                *nfrontp++ = c;
                        c = *ptyip++ & 0377, pcc--;
                        if (c == IAC)
                                *nfrontp++ = c;

+#if    defined(CRAY2) && defined(UNICOS5)
+                       else if (c == '\n' &&
+                                    my_state_is_wont(TELOPT_BINARY) && newmap)
+                               *nfrontp++ = '\r';
+#endif /* defined(CRAY2) && defined(UNICOS5) */

                        *nfrontp++ = c;
                        *nfrontp++ = c;

-                       if (c == '\r') {
+                       if ((c == '\r') && (my_state_is_wont(TELOPT_BINARY))) {

                                if (pcc > 0 && ((*ptyip & 0377) == '\n')) {
                                        *nfrontp++ = *ptyip++ & 0377;
                                        pcc--;
                                if (pcc > 0 && ((*ptyip & 0377) == '\n')) {
                                        *nfrontp++ = *ptyip++ & 0377;
                                        pcc--;


@@ -434,6 +950,18 @@ telnet(f, p)
                                        *nfrontp++ = '\0';
                        }
                }
                                        *nfrontp++ = '\0';
                        }
                }

+#if    defined(CRAY2) && defined(UNICOS5)
+               /*
+                * If chars were left over from the terminal driver,
+                * note their existence.
+                */
+                if (!uselinemode && unpcc) {
+                       pcc = unpcc;
+                       unpcc = 0;
+                       ptyip = unptyip;
+               }
+#endif /* defined(CRAY2) && defined(UNICOS5) */
+

                if (FD_ISSET(f, &obits) && (nfrontp - nbackp) > 0)
                        netflush();
                if (ncc > 0)
                if (FD_ISSET(f, &obits) && (nfrontp - nbackp) > 0)
                        netflush();
                if (ncc > 0)


@@ -442,310 +970,13 @@ telnet(f, p)
                        ptyflush();
        }
        cleanup();
                        ptyflush();
        }
        cleanup();

-}
+}  /* end of telnet */

        
        

-/*
- * State for recv fsm
- */
-#define        TS_DATA         0       /* base state */
-#define        TS_IAC          1       /* look for double IAC's */
-#define        TS_CR           2       /* CR-LF ->'s CR */
-#define        TS_BEGINNEG     3       /* throw away begin's... */
-#define        TS_ENDNEG       4       /* ...end's (suboption negotiation) */
-#define        TS_WILL         5       /* will option negotiation */
-#define        TS_WONT         6       /* wont " */
-#define        TS_DO           7       /* do " */
-#define        TS_DONT         8       /* dont " */
-
-telrcv()
-{
-       register int c;
-       static int state = TS_DATA;
-
-       while (ncc > 0) {
-               if ((&ptyobuf[BUFSIZ] - pfrontp) < 2)
-                       return;
-               c = *netip++ & 0377, ncc--;
-               switch (state) {
-
-               case TS_CR:
-                       state = TS_DATA;
-                       if ((c == 0) || (c == '\n')) {
-                               break;
-                       }
-                       /* FALL THROUGH */
-
-               case TS_DATA:
-                       if (c == IAC) {
-                               state = TS_IAC;
-                               break;
-                       }
-                       if (inter > 0)
-                               break;
-                       /*
-                        * We map \r\n ==> \n, since \r\n says
-                        * that we want to be in column 1 of the next
-                        * printable line, and \n is the standard
-                        * unix way of saying that (\r is only good
-                        * if CRMOD is set, which it normally is).
-                        */
-                       if (!myopts[TELOPT_BINARY] && c == '\r') {
-                               if ((ncc > 0) && ('\n' == *netip)) {
-                                       netip++; ncc--;
-                                       c = '\n';
-                               } else {
-                                       state = TS_CR;
-                               }
-                       }
-                       *pfrontp++ = c;
-                       break;
-
-               case TS_IAC:
-                       switch (c) {
-
-                       /*
-                        * Send the process on the pty side an
-                        * interrupt.  Do this with a NULL or
-                        * interrupt char; depending on the tty mode.
-                        */
-                       case BREAK:
-                       case IP:
-                               interrupt();
-                               break;
-
-                       /*
-                        * Are You There?
-                        */
-                       case AYT:
-                               strcpy(nfrontp, "\r\n[Yes]\r\n");
-                               nfrontp += 9;
-                               break;
-
-                       /*
-                        * Abort Output
-                        */
-                       case AO: {
-                                       struct ltchars tmpltc;
-
-                                       ptyflush();     /* half-hearted */
-                                       ioctl(pty, TIOCGLTC, &tmpltc);
-                                       if (tmpltc.t_flushc != '\377') {
-                                               *pfrontp++ = tmpltc.t_flushc;
-                                       }
-                                       *nfrontp++ = IAC;
-                                       *nfrontp++ = DM;
-                                       neturg = nfrontp-1; /* off by one XXX */
-                                       break;
-                               }
-
-                       /*
-                        * Erase Character and
-                        * Erase Line
-                        */
-                       case EC:
-                       case EL: {
-                                       struct sgttyb b;
-                                       char ch;
-
-                                       ptyflush();     /* half-hearted */
-                                       ioctl(pty, TIOCGETP, &b);
-                                       ch = (c == EC) ?
-                                               b.sg_erase : b.sg_kill;
-                                       if (ch != '\377') {
-                                               *pfrontp++ = ch;
-                                       }
-                                       break;
-                               }
-
-                       /*
-                        * Check for urgent data...
-                        */
-                       case DM:
-                               SYNCHing = stilloob(net);
-                               settimer(gotDM);
-                               break;
-
-
-                       /*
-                        * Begin option subnegotiation...
-                        */
-                       case SB:
-                               state = TS_BEGINNEG;
-                               continue;
-
-                       case WILL:
-                               state = TS_WILL;
-                               continue;
-
-                       case WONT:
-                               state = TS_WONT;
-                               continue;
-
-                       case DO:
-                               state = TS_DO;
-                               continue;
-
-                       case DONT:
-                               state = TS_DONT;
-                               continue;
-
-                       case IAC:
-                               *pfrontp++ = c;
-                               break;
-                       }
-                       state = TS_DATA;
-                       break;
-
-               case TS_BEGINNEG:
-                       if (c == IAC)
-                               state = TS_ENDNEG;
-                       break;
-
-               case TS_ENDNEG:
-                       state = c == SE ? TS_DATA : TS_BEGINNEG;
-                       break;
-
-               case TS_WILL:
-                       if (!hisopts[c])
-                               willoption(c);
-                       state = TS_DATA;
-                       continue;
-
-               case TS_WONT:
-                       if (hisopts[c])
-                               wontoption(c);
-                       state = TS_DATA;
-                       continue;
-
-               case TS_DO:
-                       if (!myopts[c])
-                               dooption(c);
-                       state = TS_DATA;
-                       continue;
-
-               case TS_DONT:
-                       if (myopts[c]) {
-                               myopts[c] = 0;
-                               sprintf(nfrontp, wont, c);
-                               nfrontp += sizeof (wont) - 2;
-                       }
-                       state = TS_DATA;
-                       continue;
-
-               default:
-                       printf("telnetd: panic state=%d\n", state);
-                       exit(1);
-               }
-       }
-}
-
-willoption(option)
-       int option;
-{
-       char *fmt;
-
-       switch (option) {
-
-       case TELOPT_BINARY:
-               mode(RAW, 0);
-               fmt = doopt;
-               break;
-
-       case TELOPT_ECHO:
-               mode(0, ECHO|CRMOD);
-               fmt = doopt;
-               break;
-
-       case TELOPT_SGA:
-               fmt = doopt;
-               break;
-
-       case TELOPT_TM:
-               fmt = dont;
-               break;
-
-       default:
-               fmt = dont;
-               break;
-       }
-       if (fmt == doopt) {
-               hisopts[option] = 1;
-       } else {
-               hisopts[option] = 0;
-       }
-       sprintf(nfrontp, fmt, option);
-       nfrontp += sizeof (dont) - 2;
-}
-
-wontoption(option)
-       int option;
-{
-       char *fmt;
-
-       switch (option) {
-       case TELOPT_ECHO:
-               mode(ECHO|CRMOD, 0);
-               break;
-
-       case TELOPT_BINARY:
-               mode(0, RAW);
-               break;
-       }
-       fmt = dont;
-       hisopts[option] = 0;
-       sprintf(nfrontp, fmt, option);
-       nfrontp += sizeof (doopt) - 2;
-}
-
-dooption(option)
-       int option;
-{
-       char *fmt;
-
-       switch (option) {
-
-       case TELOPT_TM:
-               fmt = wont;
-               break;
-
-       case TELOPT_ECHO:
-               mode(ECHO|CRMOD, 0);
-               fmt = will;
-               break;
-
-       case TELOPT_BINARY:
-               mode(RAW, 0);
-               fmt = will;
-               break;
-
-       case TELOPT_SGA:
-               fmt = will;
-               break;
-
-       default:
-               fmt = wont;
-               break;
-       }
-       if (fmt == will) {
-           myopts[option] = 1;
-       } else {
-           myopts[option] = 0;
-       }
-       sprintf(nfrontp, fmt, option);
-       nfrontp += sizeof (doopt) - 2;
-}
-
-mode(on, off)
-       int on, off;
-{
-       struct sgttyb b;
-
-       ptyflush();
-       ioctl(pty, TIOCGETP, &b);
-       b.sg_flags |= on;
-       b.sg_flags &= ~off;
-       ioctl(pty, TIOCSETP, &b);
-}
+#ifndef        TCSIG
+# ifdef        TIOCSIG
+#  define TCSIG TIOCSIG
+# endif
+#endif

 
 /*
  * Send interrupt to process on other side of pty.
 
 /*
  * Send interrupt to process on other side of pty.


@@ -754,162 +985,60 @@ mode(on, off)
  */
 interrupt()
 {
  */
 interrupt()
 {

-       struct sgttyb b;
-       struct tchars tchars;
-

        ptyflush();     /* half-hearted */
        ptyflush();     /* half-hearted */

-       ioctl(pty, TIOCGETP, &b);
-       if (b.sg_flags & RAW) {
-               *pfrontp++ = '\0';
-               return;
-       }
-       *pfrontp++ = ioctl(pty, TIOCGETC, &tchars) < 0 ?
-               '\177' : tchars.t_intrc;
-}
-
-ptyflush()
-{
-       int n;

 
 

-       if ((n = pfrontp - pbackp) > 0)
-               n = write(pty, pbackp, n);
-       if (n < 0)
-               return;
-       pbackp += n;
-       if (pbackp == pfrontp)
-               pbackp = pfrontp = ptyobuf;
+#ifdef TCSIG
+       (void) ioctl(pty, TCSIG, (char *)SIGINT);
+#else  /* TCSIG */
+       init_termbuf();
+       *pfrontp++ = slctab[SLC_IP].sptr ?
+                       (unsigned char)*slctab[SLC_IP].sptr : '\177';
+#endif /* TCSIG */

 }
 
 }
 

-#if    0
-netflush()
-{
-       int n;
-
-       if ((n = nfrontp - nbackp) > 0)
-               n = write(net, nbackp, n);
-       if (n < 0) {
-               if (errno == EWOULDBLOCK)
-                       return;
-               /* should blow this guy away... */
-               return;
-       }
-       nbackp += n;
-       if (nbackp == nfrontp)
-               nbackp = nfrontp = netobuf;
-}
-#else  /* 0 */
-
-

 /*
 /*

- *  netflush
- *             Send as much data as possible to the network,
- *     handling requests for urgent data.
+ * Send quit to process on other side of pty.
+ * If it is in raw mode, just write NULL;
+ * otherwise, write quit char.

  */
  */

-
-
-netflush()
+sendbrk()

 {
 {

-    int n;
-
-    if ((n = nfrontp - nbackp) > 0) {
-       if (!neturg) {
-           n = write(net, nbackp, n);  /* normal write */
-       } else {
-           n = neturg - nbackp;
-           /*
-            * In 4.2 (and 4.3) systems, there is some question about
-            * what byte in a sendOOB operation is the "OOB" data.
-            * To make ourselves compatible, we only send ONE byte
-            * out of band, the one WE THINK should be OOB (though
-            * we really have more the TCP philosophy of urgent data
-            * rather than the Unix philosophy of OOB data).
-            */
-           if (n > 1) {
-               n = send(net, nbackp, n-1, 0);  /* send URGENT all by itself */
-           } else {
-               n = send(net, nbackp, n, MSG_OOB);      /* URGENT data */
-           }
-       }
-    }
-    if (n < 0) {
-       if (errno == EWOULDBLOCK)
-           return;
-       /* should blow this guy away... */
-       return;
-    }
-    nbackp += n;
-    if (nbackp >= neturg) {
-       neturg = 0;
-    }
-    if (nbackp == nfrontp) {
-       nbackp = nfrontp = netobuf;
-    }
+       ptyflush();     /* half-hearted */
+#ifdef TCSIG
+       (void) ioctl(pty, TCSIG, (char *)SIGQUIT);
+#else  /* TCSIG */
+       init_termbuf();
+       *pfrontp++ = slctab[SLC_ABORT].sptr ?
+                       (unsigned char)*slctab[SLC_ABORT].sptr : '\034';
+#endif /* TCSIG */

 }
 }

-#endif /* 0 */

 
 

-cleanup()
+sendsusp()

 {
 {

-
-       rmut();
-       vhangup();      /* XXX */
-       shutdown(net, 2);
-       exit(1);
+#ifdef SIGTSTP
+       ptyflush();     /* half-hearted */
+# ifdef        TCSIG
+       (void) ioctl(pty, TCSIG, (char *)SIGTSTP);
+# else /* TCSIG */
+       *pfrontp++ = slctab[SLC_SUSP].sptr ?
+                       (unsigned char)*slctab[SLC_SUSP].sptr : '\032';
+# endif        /* TCSIG */
+#endif /* SIGTSTP */

 }
 
 }
 

-#include <utmp.h>
-
-struct utmp wtmp;
-char   wtmpf[] = "/usr/adm/wtmp";
-char   utmpf[] = "/etc/utmp";
-#define SCPYN(a, b)    strncpy(a, b, sizeof(a))
-#define SCMPN(a, b)    strncmp(a, b, sizeof(a))
-
-rmut()
+doeof()

 {
 {

-       register f;
-       int found = 0;
-       struct utmp *u, *utmp;
-       int nutmp;
-       struct stat statbf;
-
-       f = open(utmpf, O_RDWR);
-       if (f >= 0) {
-               fstat(f, &statbf);
-               utmp = (struct utmp *)malloc(statbf.st_size);
-               if (!utmp)
-                       syslog(LOG_ERR, "utmp malloc failed");
-               if (statbf.st_size && utmp) {
-                       nutmp = read(f, utmp, statbf.st_size);
-                       nutmp /= sizeof(struct utmp);
-               
-                       for (u = utmp ; u < &utmp[nutmp] ; u++) {
-                               if (SCMPN(u->ut_line, line+5) ||
-                                   u->ut_name[0]==0)
-                                       continue;
-                               lseek(f, ((long)u)-((long)utmp), L_SET);
-                               SCPYN(u->ut_name, "");
-                               SCPYN(u->ut_host, "");
-                               time(&u->ut_time);
-                               write(f, (char *)u, sizeof(wtmp));
-                               found++;
-                       }
-               }
-               close(f);
-       }
-       if (found) {
-               f = open(wtmpf, O_WRONLY|O_APPEND);
-               if (f >= 0) {
-                       SCPYN(wtmp.ut_line, line+5);
-                       SCPYN(wtmp.ut_name, "");
-                       SCPYN(wtmp.ut_host, "");
-                       time(&wtmp.ut_time);
-                       write(f, (char *)&wtmp, sizeof(wtmp));
-                       close(f);
-               }
+#if    defined(USE_TERMIO) && defined(SYSV_TERMIO)
+       extern char oldeofc;
+#endif
+       init_termbuf();
+
+#if    defined(USE_TERMIO) && defined(SYSV_TERMIO)
+       if (!tty_isediting()) {
+               *pfrontp++ = oldeofc;
+               return;

        }
        }

-       chmod(line, 0666);
-       chown(line, 0, 0);
-       line[strlen("/dev/")] = 'p';
-       chmod(line, 0666);
-       chown(line, 0, 0);
+#endif
+       *pfrontp++ = slctab[SLC_EOF].sptr ?
+                       (unsigned char)*slctab[SLC_EOF].sptr : '\004';

 }
 }