Imported Upstream version 5.45upstream/5.45

1 files changed, 781 insertions, 0 deletions

diff --git a/pty_termios.c b/pty_termios.c
new file mode 100644
index 0000000..c605b23
--- /dev/null
+++ b/pty_termios.c
@@ -0,0 +1,781 @@
+/* pty_termios.c - routines to allocate ptys - termios version
+
+Written by: Don Libes, NIST, 2/6/90
+
+This file is in the public domain.  However, the author and NIST
+would appreciate credit if you use this file or parts of it.
+
+*/
+
+#include <stdio.h>
+#include <signal.h>
+
+#if defined(SIGCLD) && !defined(SIGCHLD)
+#define SIGCHLD SIGCLD
+#endif
+
+#include "expect_cf.h"
+
+/*
+   The following functions are linked from the Tcl library.  They
+   don't cause anything else in the library to be dragged in, so it
+   shouldn't cause any problems (e.g., bloat).
+
+   The functions are relatively small but painful enough that I don't care
+   to recode them.  You may, if you absolutely want to get rid of any
+   vestiges of Tcl.
+*/
+extern char *TclGetRegError();
+
+#if defined(HAVE_PTMX_BSD) && defined(HAVE_PTMX)
+/*
+ * Some systems have both PTMX and PTMX_BSD.
+ * In fact, alphaev56-dec-osf4.0e has /dev/pts, /dev/pty, /dev/ptym,
+ * /dev/ptm, /dev/ptmx, and /dev/ptmx_bsd
+ * Suggestion from Martin Buchholz <martin@xemacs.org> is that BSD
+ * is usually deprecated and so should be here.
+ */
+#undef HAVE_PTMX_BSD
+#endif
+
+/* Linux and Digital systems can be configured to have both.
+According to Ashley Pittman <ashley@ilo.dec.com>, Digital works better
+with openpty which supports 4000 while ptmx supports 60. */
+#if defined(HAVE_OPENPTY) && defined(HAVE_PTMX)
+#undef HAVE_PTMX
+#endif
+
+#if defined(HAVE_PTYM) && defined(HAVE_PTMX)
+/*
+ * HP-UX 10.0 with streams (optional) have both PTMX and PTYM.  I don't
+ * know which is preferred but seeing as how the HP trap stuff is so
+ * unusual, it is probably safer to stick with the native HP pty support,
+ * too.
+ */
+#undef HAVE_PTMX
+#endif
+
+#ifdef HAVE_UNISTD_H
+#  include <unistd.h>
+#endif
+#ifdef HAVE_INTTYPES_H
+#  include <inttypes.h>
+#endif
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#ifdef NO_STDLIB_H
+#include "../compat/stdlib.h"
+#else
+#include <stdlib.h>
+#endif
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
+
+#ifdef HAVE_SYSMACROS_H
+#include <sys/sysmacros.h>
+#endif
+
+#ifdef HAVE_PTYTRAP
+#include <sys/ptyio.h>
+#endif
+
+#include <sys/file.h>
+
+#ifdef HAVE_SYS_FCNTL_H
+#  include <sys/fcntl.h>
+#else
+#  include <fcntl.h>
+#endif
+
+#if defined(_SEQUENT_)
+#  include <sys/strpty.h>
+#endif
+
+#if defined(HAVE_PTMX) && defined(HAVE_STROPTS_H)
+#  include <sys/stropts.h>
+#endif
+
+#include "exp_win.h"
+
+#include "exp_tty_in.h"
+#include "exp_rename.h"
+#include "exp_pty.h"
+
+void expDiagLog();
+void expDiagLogPtr();
+
+#include <errno.h>
+/*extern char *sys_errlist[];*/
+
+#ifndef TRUE
+#define TRUE 1
+#define FALSE 0
+#endif
+
+/* Convex getpty is different than older-style getpty */
+/* Convex getpty is really just a cover function that does the traversal */
+/* across the domain of pty names.  It makes no attempt to verify that */
+/* they can actually be used.  Indded, the logic in the man page is */
+/* wrong because it will allow you to allocate ptys that your own account */
+/* already has in use. */
+#if defined(HAVE_GETPTY) && defined(CONVEX)
+#undef HAVE_GETPTY
+#define HAVE_CONVEX_GETPTY
+extern char *getpty();
+static char *master_name;
+static char slave_name[] = "/dev/ptyXX";
+static char	*tty_bank;		/* ptr to char [p-z] denoting
+					   which bank it is */
+static char	*tty_num;		/* ptr to char [0-f] denoting
+					   which number it is */
+#endif
+
+#if defined(_SEQUENT_) && !defined(HAVE_PTMX)
+/* old-style SEQUENT, new-style uses ptmx */
+static char *master_name, *slave_name;
+#endif /* _SEQUENT */
+
+/* very old SGIs prefer _getpty over ptc */
+#if defined(HAVE__GETPTY) && defined(HAVE_PTC) && !defined(HAVE_GETPTY)
+#undef HAVE_PTC
+#endif
+
+#if defined(HAVE_PTC)
+static char slave_name[] = "/dev/ttyqXXX";
+/* some machines (e.g., SVR4.0 StarServer) have all of these and */
+/* HAVE_PTC works best */
+#undef HAVE_GETPTY
+#undef HAVE__GETPTY
+#endif
+
+#if defined(HAVE__GETPTY) || defined(HAVE_PTC_PTS) || defined(HAVE_PTMX)
+static char *slave_name;
+#endif
+
+#if defined(HAVE_GETPTY)
+#include <sys/vty.h>
+static char master_name[MAXPTYNAMELEN];
+static char slave_name[MAXPTYNAMELEN];
+#endif
+
+#if !defined(HAVE_GETPTY) && !defined(HAVE__GETPTY) && !defined(HAVE_PTC) && !defined(HAVE_PTC_PTS) && !defined(HAVE_PTMX) && !defined(HAVE_CONVEX_GETPTY) && !defined(_SEQUENT_) && !defined(HAVE_SCO_CLIST_PTYS) && !defined(HAVE_OPENPTY)
+#ifdef HAVE_PTYM
+			/* strange order and missing d is intentional */
+static char	banks[] = "pqrstuvwxyzabcefghijklo";
+static char	master_name[] = "/dev/ptym/ptyXXXX";
+static char	slave_name[] = "/dev/pty/ttyXXXX";
+static char	*slave_bank;
+static char	*slave_num;
+#else
+static char	banks[] = "pqrstuvwxyzPQRSTUVWXYZ";
+static char	master_name[] = "/dev/ptyXX";
+static char	slave_name [] = "/dev/ttyXX";
+#endif /* HAVE_PTYM */
+
+static char	*tty_type;		/* ptr to char [pt] denoting
+					   whether it is a pty or tty */
+static char	*tty_bank;		/* ptr to char [p-z] denoting
+					   which bank it is */
+static char	*tty_num;		/* ptr to char [0-f] denoting
+					   which number it is */
+#endif
+
+#if defined(HAVE_SCO_CLIST_PTYS)
+#  define MAXPTYNAMELEN 64
+static char master_name[MAXPTYNAMELEN];
+static char slave_name[MAXPTYNAMELEN];
+#endif /* HAVE_SCO_CLIST_PTYS */
+
+#ifdef HAVE_OPENPTY
+static char master_name[64];
+static char slave_name[64];
+#endif
+
+char *exp_pty_slave_name;
+char *exp_pty_error;
+
+#if 0
+static void
+pty_stty(s,name)
+char *s;		/* args to stty */
+char *name;		/* name of pty */
+{
+#define MAX_ARGLIST 10240
+	char buf[MAX_ARGLIST];	/* overkill is easier */
+	RETSIGTYPE (*old)();	/* save old sigalarm handler */
+	int pid;
+	
+	old = signal(SIGCHLD, SIG_DFL);
+	switch (pid = fork()) {
+	case 0: /* child */
+	  exec_stty(STTY_BIN,STTY_BIN,s);
+		break;
+	case -1: /* fail */
+	default: /* parent */
+		waitpid(pid);
+		break;
+	}
+
+	signal(SIGCHLD, old);	/* restore signal handler */
+}
+
+exec_stty(s)
+char *s;
+{
+	char *args[50];
+	char *cp;
+	int argi = 0;
+	int quoting = FALSE;
+	int in_token = FALSE;	/* TRUE if we are reading a token */
+
+	args[0] = cp = s;
+	while (*s) {
+		if (quoting) {
+			if (*s == '\\' && *(s+1) == '"') { /* quoted quote */
+				s++;	/* get past " */
+				*cp++ = *s++;
+			} else 	if (*s == '\"') { /* close quote */
+				end_token
+				quoting = FALSE;
+			} else *cp++ = *s++; /* suck up anything */
+		} else if (*s == '\"') { /* open quote */
+			in_token = TRUE;
+			quoting = TRUE;
+			s++;
+		} else if (isspace(*s)) {
+			end_token
+		} else {
+			*cp++ = *s++;
+			in_token = TRUE;
+		}
+	}
+	end_token
+	args[argi] = (char *) 0; /* terminate argv */
+	execvp(args[0],args);
+}
+#endif /*0*/
+
+static void
+pty_stty(s,name)
+char *s;		/* args to stty */
+char *name;		/* name of pty */
+{
+#define MAX_ARGLIST 10240
+	char buf[MAX_ARGLIST];	/* overkill is easier */
+	RETSIGTYPE (*old)();	/* save old sigalarm handler */
+
+#ifdef STTY_READS_STDOUT
+	sprintf(buf,"%s %s > %s",STTY_BIN,s,name);
+#else
+	sprintf(buf,"%s %s < %s",STTY_BIN,s,name);
+#endif
+	old = signal(SIGCHLD, SIG_DFL);
+	system(buf);
+	signal(SIGCHLD, old);	/* restore signal handler */
+}
+
+int exp_dev_tty;	/* file descriptor to /dev/tty or -1 if none */
+static int knew_dev_tty;/* true if we had our hands on /dev/tty at any time */
+
+exp_tty exp_tty_original;
+
+#define GET_TTYTYPE	0
+#define SET_TTYTYPE	1
+static void
+ttytype(request,fd,ttycopy,ttyinit,s)
+int request;
+int fd;
+		/* following are used only if request == SET_TTYTYPE */
+int ttycopy;	/* true/false, copy from /dev/tty */
+int ttyinit;	/* if true, initialize to sane state */
+char *s;	/* stty args */
+{
+	if (request == GET_TTYTYPE) {
+#ifdef HAVE_TCSETATTR
+		if (-1 == tcgetattr(fd, &exp_tty_original)) {
+#else
+		if (-1 == ioctl(fd, TCGETS, (char *)&exp_tty_original)) {
+#endif
+			knew_dev_tty = FALSE;
+			exp_dev_tty = -1;
+		}
+		exp_window_size_get(fd);
+	} else {	/* type == SET_TTYTYPE */
+		if (ttycopy && knew_dev_tty) {
+#ifdef HAVE_TCSETATTR
+			(void) tcsetattr(fd, TCSADRAIN, &exp_tty_current);
+#else
+			(void) ioctl(fd, TCSETS, (char *)&exp_tty_current);
+#endif
+
+			exp_window_size_set(fd);
+		}
+
+#ifdef __CENTERLINE__
+#undef DFLT_STTY
+#define DFLT_STTY "sane"
+#endif
+
+/* Apollo Domain doesn't need this */
+#ifdef DFLT_STTY
+		if (ttyinit) {
+			/* overlay parms originally supplied by Makefile */
+/* As long as BSD stty insists on stdout == stderr, we can no longer write */
+/* diagnostics to parent stderr, since stderr has is now child's */
+/* Maybe someday they will fix stty? */
+/*			expDiagLogPtrStr("exp_getptyslave: (default) stty %s\n",DFLT_STTY);*/
+			pty_stty(DFLT_STTY,slave_name);
+		}
+#endif
+
+		/* lastly, give user chance to override any terminal parms */
+		if (s) {
+			/* give user a chance to override any terminal parms */
+/*			expDiagLogPtrStr("exp_getptyslave: (user-requested) stty %s\n",s);*/
+			pty_stty(s,slave_name);
+		}
+	}
+}
+
+void
+exp_init_pty()
+{
+#if !defined(HAVE_GETPTY) && !defined(HAVE__GETPTY) && !defined(HAVE_PTC) && !defined(HAVE_PTC_PTS) && !defined(HAVE_PTMX) && !defined(HAVE_CONVEX_GETPTY) && !defined(_SEQUENT_) && !defined(HAVE_SCO_CLIST_PTYS) && !defined(HAVE_OPENPTY)
+#ifdef HAVE_PTYM
+	static char dummy;
+	tty_bank =  &master_name[strlen("/dev/ptym/pty")];
+	tty_num  =  &master_name[strlen("/dev/ptym/ptyX")];
+	slave_bank = &slave_name[strlen("/dev/pty/tty")];
+	slave_num  = &slave_name[strlen("/dev/pty/ttyX")];
+#else
+	tty_bank =  &master_name[strlen("/dev/pty")];
+	tty_num  =  &master_name[strlen("/dev/ptyp")];
+	tty_type =   &slave_name[strlen("/dev/")];
+#endif
+
+#endif /* HAVE_PTYM */
+
+
+	exp_dev_tty = open("/dev/tty",O_RDWR);
+	knew_dev_tty = (exp_dev_tty != -1);
+	if (knew_dev_tty) ttytype(GET_TTYTYPE,exp_dev_tty,0,0,(char *)0);
+}
+
+#ifndef R_OK
+/* 3b2 doesn't define these according to jthomas@nmsu.edu. */
+#define R_OK 04
+#define W_OK 02
+#endif
+
+int
+exp_getptymaster()
+{
+	char *hex, *bank;
+	struct stat stat_buf;
+	int master = -1;
+	int slave = -1;
+	int num;
+
+	exp_pty_error = 0;
+
+#define TEST_PTY 1
+
+#if defined(HAVE_PTMX) || defined(HAVE_PTMX_BSD)
+#undef TEST_PTY
+#if defined(HAVE_PTMX_BSD)
+        if ((master = open("/dev/ptmx_bsd", O_RDWR)) == -1) return(-1);
+#else
+	if ((master = open("/dev/ptmx", O_RDWR)) == -1) return(-1);
+#endif
+	if ((slave_name = (char *)ptsname(master)) == NULL) {
+		close(master);
+		return(-1);
+	}
+	if (grantpt(master)) {
+	  static char buf[500];
+	  exp_pty_error = buf;
+	  sprintf(exp_pty_error,"grantpt(%s) failed - likely reason is that your system administrator (in a rage of blind passion to rid the system of security holes) removed setuid from the utility used internally by grantpt to change pty permissions.  Tell your system admin to reestablish setuid on the utility.  Get the utility name by running Expect under truss or trace.", expErrnoMsg(errno));
+	  close(master);
+	  return(-1);
+	}
+	if (-1 == (int)unlockpt(master)) {
+	  static char buf[500];
+	  exp_pty_error = buf;
+	  sprintf(exp_pty_error,"unlockpt(%s) failed.", expErrnoMsg(errno));
+	  close(master);
+	  return(-1);
+	}
+#ifdef TIOCFLUSH
+	(void) ioctl(master,TIOCFLUSH,(char *)0);
+#endif /* TIOCFLUSH */
+
+	exp_pty_slave_name = slave_name;
+	return(master);
+#endif
+
+#if defined(HAVE__GETPTY)		/* SGI needs it this way */
+#undef TEST_PTY
+	slave_name = _getpty(&master, O_RDWR, 0600, 0);
+	if (slave_name == NULL)
+		return (-1);	
+	exp_pty_slave_name = slave_name;
+	return(master);
+#endif
+
+#if defined(HAVE_PTC) && !defined(HAVE__GETPTY)	/* old SGI, version 3 */
+#undef TEST_PTY
+	master = open("/dev/ptc", O_RDWR);
+	if (master >= 0) {
+		int ptynum;
+
+		if (fstat(master, &stat_buf) < 0) {
+			close(master);
+			return(-1);
+		}
+		ptynum = minor(stat_buf.st_rdev);
+		sprintf(slave_name,"/dev/ttyq%d",ptynum);
+	}
+	exp_pty_slave_name = slave_name;
+	return(master);
+#endif
+
+#if defined(HAVE_GETPTY) && !defined(HAVE__GETPTY)
+#undef TEST_PTY
+	master = getpty(master_name, slave_name, O_RDWR);
+	/* is it really necessary to verify slave side is usable? */
+	exp_pty_slave_name = slave_name;
+	return master;
+#endif
+
+#if defined(HAVE_PTC_PTS)
+#undef TEST_PTY
+	master = open("/dev/ptc",O_RDWR);
+	if (master >= 0) {
+		/* never fails */
+		slave_name = ttyname(master);
+	}
+	exp_pty_slave_name = slave_name;
+	return(master);
+#endif
+
+#if defined(_SEQUENT_) && !defined(HAVE_PTMX)
+#undef TEST_PTY
+	/* old-style SEQUENT, new-style uses ptmx */
+	master = getpseudotty(&slave_name, &master_name);
+	exp_pty_slave_name = slave_name;
+	return(master);
+#endif /* _SEQUENT_ */
+
+#if defined(HAVE_OPENPTY)
+#undef TEST_PTY
+	if (openpty(&master, &slave, master_name, 0, 0) != 0) {
+		close(master);
+		close(slave);
+		return -1;
+	}
+	strcpy(slave_name, ttyname(slave));
+	exp_pty_slave_name = slave_name;
+	close(slave);
+	return master;
+#endif /* HAVE_OPENPTY */
+
+#if defined(TEST_PTY)
+	/*
+	 * all pty allocation mechanisms after this require testing
+	 */
+	if (exp_pty_test_start() == -1) return -1;
+
+#if !defined(HAVE_CONVEX_GETPTY) && !defined(HAVE_PTYM) && !defined(HAVE_SCO_CLIST_PTYS)
+	for (bank = banks;*bank;bank++) {
+		*tty_bank = *bank;
+		*tty_num = '0';
+		if (stat(master_name, &stat_buf) < 0) break;
+		for (hex = "0123456789abcdef";*hex;hex++) {
+			*tty_num = *hex;
+			strcpy(slave_name,master_name);
+			*tty_type = 't';
+			master = exp_pty_test(master_name,slave_name,*tty_bank,tty_num);
+			if (master >= 0) goto done;
+		}
+	}
+#endif
+
+#ifdef HAVE_SCO_CLIST_PTYS
+        for (num = 0; ; num++) {
+            char num_str [16];
+
+            sprintf (num_str, "%d", num);
+            sprintf (master_name, "%s%s", "/dev/ptyp", num_str);
+            if (stat (master_name, &stat_buf) < 0)
+                break;
+            sprintf (slave_name, "%s%s", "/dev/ttyp", num_str);
+
+            master = exp_pty_test(master_name,slave_name,'0',num_str);
+            if (master >= 0)
+                goto done;
+        }
+#endif
+
+#ifdef HAVE_PTYM
+	/* systems with PTYM follow this idea:
+
+	   /dev/ptym/pty[a-ce-z][0-9a-f]                master pseudo terminals
+	   /dev/pty/tty[a-ce-z][0-9a-f]                 slave pseudo terminals
+	   /dev/ptym/pty[a-ce-z][0-9][0-9]              master pseudo terminals
+	   /dev/pty/tty[a-ce-z][0-9][0-9]               slave pseudo terminals
+
+	   SPPUX (Convex's HPUX compatible) follows the PTYM convention but
+	   extends it:
+
+	   /dev/ptym/pty[a-ce-z][0-9][0-9][0-9]         master pseudo terminals
+	   /dev/pty/tty[a-ce-z][0-9][0-9][0-9]          slave pseudo terminals
+
+	   The code does not distinguish between HPUX and SPPUX because there
+	   is no reason to.  HPUX will merely fail the extended SPPUX tests.
+	   In fact, most SPPUX systems will fail simply because few systems
+	   will actually have the extended ptys.  However, the tests are
+	   fast so it is no big deal.
+	 */
+
+	/*
+	 * pty[a-ce-z][0-9a-f]
+	 */
+
+	for (bank = banks;*bank;bank++) {
+		*tty_bank = *bank;
+		sprintf(tty_num,"0");
+		if (stat(master_name, &stat_buf) < 0) break;
+		*(slave_num+1) = '\0';
+		for (hex = "0123456789abcdef";*hex;hex++) {
+			*tty_num = *hex;
+			*slave_bank = *tty_bank;
+			*slave_num = *tty_num;
+			master = exp_pty_test(master_name,slave_name,*tty_bank,tty_num);
+			if (master >= 0) goto done;
+		}
+	}
+
+	/*
+	 * tty[p-za-ce-o][0-9][0-9]
+	 */
+
+	for (bank = banks;*bank;bank++) {
+		*tty_bank = *bank;
+		sprintf(tty_num,"00");
+		if (stat(master_name, &stat_buf) < 0) break;
+		for (num = 0; num<100; num++) {
+			*slave_bank = *tty_bank;
+			sprintf(tty_num,"%02d",num);
+			strcpy(slave_num,tty_num);
+			master = exp_pty_test(master_name,slave_name,*tty_bank,tty_num);
+			if (master >= 0) goto done;
+		}
+	}
+
+	/*
+	 * tty[p-za-ce-o][0-9][0-9][0-9]
+	 */
+	for (bank = banks;*bank;bank++) {
+		*tty_bank = *bank;
+		sprintf(tty_num,"000");
+		if (stat(master_name, &stat_buf) < 0) break;
+		for (num = 0; num<1000; num++) {
+			*slave_bank = *tty_bank;
+			sprintf(tty_num,"%03d",num);
+			strcpy(slave_num,tty_num);
+			master = exp_pty_test(master_name,slave_name,*tty_bank,tty_num);
+			if (master >= 0) goto done;
+		}
+	}
+
+#endif /* HAVE_PTYM */
+
+#if defined(HAVE_CONVEX_GETPTY)
+	for (;;) {
+		if ((master_name = getpty()) == NULL) return -1;
+ 
+		strcpy(slave_name,master_name);
+		slave_name[5] = 't';/* /dev/ptyXY ==> /dev/ttyXY */
+
+		tty_bank = &slave_name[8];
+		tty_num = &slave_name[9];
+		master = exp_pty_test(master_name,slave_name,*tty_bank,tty_num);
+		if (master >= 0) goto done;
+	}
+#endif
+
+ done:
+	exp_pty_test_end();
+	exp_pty_slave_name = slave_name;
+	return(master);
+
+#endif /* defined(TEST_PTY) */
+}
+
+/* if slave is opened in a child, slave_control(1) must be executed after */
+/*   master is opened (when child is opened is irrelevent) */
+/* if slave is opened in same proc as master, slave_control(1) must executed */
+/*   after slave is opened */
+/*ARGSUSED*/
+void
+exp_slave_control(master,control)
+int master;
+int control;	/* if 1, enable pty trapping of close/open/ioctl */
+{
+#ifdef HAVE_PTYTRAP
+	ioctl(master, TIOCTRAP, &control);
+#endif /* HAVE_PTYTRAP */
+}
+
+int
+exp_getptyslave(
+    int ttycopy,
+    int ttyinit,
+    CONST char *stty_args)
+{
+	int slave, slave2;
+	char buf[10240];
+
+	if (0 > (slave = open(slave_name, O_RDWR))) {
+		static char buf[500];
+		exp_pty_error = buf;
+		sprintf(exp_pty_error,"open(%s,rw) = %d (%s)",slave_name,slave,expErrnoMsg(errno));
+		return(-1);
+	}
+
+#if defined(HAVE_PTMX_BSD)
+	if (ioctl (slave, I_LOOK, buf) != 0)
+		if (ioctl (slave, I_PUSH, "ldterm")) {
+			expDiagLogPtrStrStr("ioctl(%d,I_PUSH,\"ldterm\") = %s\n",slave,expErrnoMsg(errno));
+	}
+#else
+#if defined(HAVE_PTMX)
+	if (ioctl(slave, I_PUSH, "ptem")) {
+		expDiagLogPtrStrStr("ioctl(%d,I_PUSH,\"ptem\") = %s\n",slave,expErrnoMsg(errno));
+	}
+	if (ioctl(slave, I_PUSH, "ldterm")) {
+		expDiagLogPtrStrStr("ioctl(%d,I_PUSH,\"ldterm\") = %s\n",slave,expErrnoMsg(errno));
+	}
+	if (ioctl(slave, I_PUSH, "ttcompat")) {
+		expDiagLogPtrStrStr("ioctl(%d,I_PUSH,\"ttcompat\") = %s\n",slave,expErrnoMsg(errno));
+	}
+#endif
+#endif
+
+	if (0 == slave) {
+		/* if opened in a new process, slave will be 0 (and */
+		/* ultimately, 1 and 2 as well) */
+
+		/* duplicate 0 onto 1 and 2 to prepare for stty */
+		fcntl(0,F_DUPFD,1);
+		fcntl(0,F_DUPFD,2);
+	}
+
+	ttytype(SET_TTYTYPE,slave,ttycopy,ttyinit,stty_args);
+
+#if 0
+#ifdef HAVE_PTYTRAP
+	/* do another open, to tell master that slave is done fiddling */
+	/* with pty and master does not have to wait to do further acks */
+	if (0 > (slave2 = open(slave_name, O_RDWR))) return(-1);
+	close(slave2);
+#endif /* HAVE_PTYTRAP */
+#endif
+
+	(void) exp_pty_unlock();
+	return(slave);
+}
+
+#ifdef HAVE_PTYTRAP
+#include <sys/ptyio.h>
+#include <sys/time.h>
+
+/* This function attempts to deal with HP's pty interface.  This
+function simply returns an indication of what was trapped (or -1 for
+failure), the parent deals with the details.
+
+Originally, I tried to just trap open's but that is not enough.  When
+the pty is initialized, ioctl's are generated and if not trapped will
+hang the child if no further trapping is done.  (This could occur if
+parent spawns a process and then immediatley does a close.)  So
+instead, the parent must trap the ioctl's.  It probably suffices to
+trap the write ioctl's (and tiocsctty which some hp's need) -
+conceivably, stty could be smart enough not to do write's if the tty
+settings are already correct.  In that case, we'll have to rethink
+this.
+
+Suggestions from HP engineers encouraged.  I cannot imagine how this
+interface was intended to be used!
+
+*/
+   
+int
+exp_wait_for_slave_open(fd)
+int fd;
+{
+	fd_set excep;
+	struct timeval t;
+	struct request_info ioctl_info;
+	int rc;
+	int found = 0;
+
+	int maxfds = sysconf(_SC_OPEN_MAX);
+
+	t.tv_sec = 30;	/* 30 seconds */
+	t.tv_usec = 0;
+
+	FD_ZERO(&excep);
+	FD_SET(fd,&excep);
+
+	rc = select(maxfds,
+		(SELECT_MASK_TYPE *)0,
+		(SELECT_MASK_TYPE *)0,
+		(SELECT_MASK_TYPE *)&excep,
+		&t);
+	if (rc != 1) {
+		expDiagLogPtrStr("spawned process never started: %s\r\n",expErrnoMsg(errno));
+		return(-1);
+	}
+	if (ioctl(fd,TIOCREQCHECK,&ioctl_info) < 0) {
+		expDiagLogPtrStr("ioctl(TIOCREQCHECK) failed: %s\r\n",expErrnoMsg(errno));
+		return(-1);
+	}
+
+	found = ioctl_info.request;
+
+	expDiagLogPtrX("trapped pty op = %x",found);
+	if (found == TIOCOPEN) {
+		expDiagLogPtr(" TIOCOPEN");
+	} else if (found == TIOCCLOSE) {
+		expDiagLogPtr(" TIOCCLOSE");
+	}
+
+#ifdef TIOCSCTTY
+	if (found == TIOCSCTTY) {
+		expDiagLogPtr(" TIOCSCTTY");
+	}
+#endif
+
+	if (found & IOC_IN) {
+		expDiagLogPtr(" IOC_IN (set)");
+	} else if (found & IOC_OUT) {
+		expDiagLogPtr(" IOC_OUT (get)");
+	}
+
+	expDiagLogPtr("\n");
+
+	if (ioctl(fd, TIOCREQSET, &ioctl_info) < 0) {
+		expDiagLogPtrStr("ioctl(TIOCREQSET) failed: %s\r\n",expErrnoMsg(errno));
+		return(-1);
+	}
+	return(found);
+}
+#endif
+
+void
+exp_pty_exit()
+{
+	/* a stub so we can do weird things on the cray */
+}