rxvt-unicode/src/ptytty.C

/*--------------------------------*-C-*---------------------------------*
 * File:        ptytty.C
 *----------------------------------------------------------------------*
 *
 * All portions of code are copyright by their respective author/s.
 * Copyright (c) 1999-2001 Geoff Wing <gcw@pobox.com>
 * Copyright (c) 2004      Marc Lehmann <pcg@goof.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *---------------------------------------------------------------------*/

#include "../config.h"          /* NECESSARY */

/*
 * Try to be self-contained except for the above autoconfig'd defines
 */

#if 0
#ifdef HAVE_GETPT
# define _GNU_SOURCE
#endif
#endif

#include <cstdio>
#ifdef HAVE_STDLIB_H
# include <cstdlib>
#endif
#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#if defined(HAVE_STRING_H)
# include <cstring>
#endif
#ifdef HAVE_FCNTL_H
# include <fcntl.h>
#endif
#ifdef HAVE_SYS_IOCTL_H
# include <sys/ioctl.h>
#endif
#if defined(PTYS_ARE_PTMX) && !defined(__CYGWIN32__)
# include <sys/stropts.h>      /* for I_PUSH */
#endif
#ifdef HAVE_ISASTREAM
# include <stropts.h>
#endif

#ifdef DEBUG_TTY
# define D_TTY(x)               fprintf x ; fputc('\n', stderr) ; fflush(stderr)
#else
# define D_TTY(x)
#endif

/* ------------------------------------------------------------------------- *
 *                  GET PSEUDO TELETYPE - MASTER AND SLAVE                   *
 * ------------------------------------------------------------------------- */
/*
 * Returns pty file descriptor, or -1 on failure 
 * If successful, ttydev is set to the name of the slave device.
 * fd_tty _may_ also be set to an open fd to the slave device
 */
/* EXTPROTO */
int
rxvt_get_pty (int *fd_tty, const char **ttydev)
{
  int pfd;

#ifdef PTYS_ARE_OPENPTY

  char tty_name[sizeof "/dev/pts/????\0"];

  if (openpty (&pfd, fd_tty, tty_name, NULL, NULL) != -1)
    {
      *ttydev = strdup (tty_name);
      return pfd;
    }
#endif

#ifdef PTYS_ARE__GETPTY
  *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
  if (*ttydev != NULL)
    return pfd;
#endif

#ifdef PTYS_ARE_GETPTY

  char           *ptydev;

  while ((ptydev = getpty ()) != NULL)
    if ((pfd = open (ptydev, O_RDWR | O_NOCTTY, 0)) >= 0)
      {
        *ttydev = ptydev;
        return pfd;
      }
#endif

#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_PTMX)

  {
#  ifdef PTYS_ARE_GETPT
    pfd = getpt ();
#  else

    pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
#  endif

    if (pfd >= 0)
      {
        if (grantpt (pfd) == 0  /* change slave permissions */
            && unlockpt (pfd) == 0)
          {     /* slave now unlocked */
            *ttydev = ptsname (pfd);    /* get slave's name */
            return pfd;
          }
        close (pfd);
      }
  }
# endif
#endif

#ifdef PTYS_ARE_PTC
  if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
    {
      *ttydev = ttyname (pfd);
      return pfd;
    }
#endif

#ifdef PTYS_ARE_CLONE
  if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
    {
      *ttydev = ptsname (pfd);
      return pfd;
    }
#endif

#ifdef PTYS_ARE_NUMERIC
  {
    int             idx;
    char           *c1, *c2;
    char            pty_name[] = "/dev/ptyp???";
    char            tty_name[] = "/dev/ttyp???";

    c1 = & (pty_name[sizeof (pty_name) - 4]);
    c2 = & (tty_name[sizeof (tty_name) - 4]);
    for (idx = 0; idx < 256; idx++)
      {
        sprintf (c1, "%d", idx);
        sprintf (c2, "%d", idx);
        if (access (tty_name, F_OK) < 0)
          {
            idx = 256;
            break;
          }
        if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
          {
            if (access (tty_name, R_OK | W_OK) == 0)
              {
                *ttydev = strdup (tty_name);
                return pfd;
              }
            close (pfd);
          }
      }
  }
#endif
#ifdef PTYS_ARE_SEARCHED
  {
    const char     *c1, *c2;
    char            pty_name[] = "/dev/pty??";
    char            tty_name[] = "/dev/tty??";

# ifndef PTYCHAR1
#  define PTYCHAR1      "pqrstuvwxyz"
# endif
# ifndef PTYCHAR2
#  define PTYCHAR2      "0123456789abcdef"
# endif

    for (c1 = PTYCHAR1; *c1; c1++)
      {
        pty_name[ (sizeof (pty_name) - 3)] =
          tty_name[ (sizeof (pty_name) - 3)] = *c1;
        for (c2 = PTYCHAR2; *c2; c2++)
          {
            pty_name[ (sizeof (pty_name) - 2)] =
              tty_name[ (sizeof (pty_name) - 2)] = *c2;
            if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
              {
                if (access (tty_name, R_OK | W_OK) == 0)
                  {
                    *ttydev = strdup (tty_name);
                    return pfd;
                  }
                close (pfd);
              }
          }
      }
  }
#endif
  return -1;
}

/*----------------------------------------------------------------------*/
/*
 * Returns tty file descriptor, or -1 on failure 
 */
/* EXTPROTO */
int
rxvt_get_tty (const char *ttydev)
{
  return open (ttydev, O_RDWR | O_NOCTTY, 0);
}

/*----------------------------------------------------------------------*/
/*
 * Make our tty a controlling tty so that /dev/tty points to us
 */
/* EXTPROTO */
int
rxvt_control_tty (int fd_tty, const char *ttydev)
{
#ifndef __QNX__
  int fd;

  D_TTY ((stderr, "rxvt_control_tty (): pid: %d, tty fd: %d, dev: %s", getpid (), fd_tty, ttydev));
  /* ---------------------------------------- */
# ifdef HAVE_SETSID
  setsid ();
# endif
# if defined(HAVE_SETPGID)
  setpgid (0, 0);
# elif defined(HAVE_SETPGRP)
  setpgrp (0, 0);
# endif
  /* ---------------------------------------- */
# ifdef TIOCNOTTY

  fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
  D_TTY ((stderr, "rxvt_control_tty (): Voiding tty associations: previous=%s", fd < 0 ? "no" : "yes"));
  if (fd >= 0)
    {
      ioctl (fd, TIOCNOTTY, NULL);      /* void tty associations */
      close (fd);
    }
# endif
  /* ---------------------------------------- */
  fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
  D_TTY ((stderr, "rxvt_control_tty (): /dev/tty has controlling tty? %s", fd < 0 ? "no (good)" : "yes (bad)"));
  if (fd >= 0)
    close (fd);         /* ouch: still have controlling tty */
  /* ---------------------------------------- */
#if defined(PTYS_ARE_PTMX) && defined(I_PUSH)
  /*
   * Push STREAMS modules:
   *    ptem: pseudo-terminal hardware emulation module.
   *    ldterm: standard terminal line discipline.
   *    ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
   *
   * After we push the STREAMS modules, the first open () on the slave side
   * (i.e. the next section between the dashes giving us "tty opened OK")
   * should make the "ptem" (or "ldterm" depending upon either which OS
   * version or which set of manual pages you have) module give us a
   * controlling terminal.  We must already have close ()d the master side
   * fd in this child process before we push STREAMS modules on because the
   * documentation is really unclear about whether it is any close () on
   * the master side or the last close () - i.e. a proper STREAMS dismantling
   * close () - on the master side which causes a hang up to be sent
   * through - Geoff Wing
   */
# ifdef HAVE_ISASTREAM
  if (isastream (fd_tty) == 1)
# endif
    {
      D_TTY ((stderr, "rxvt_control_tty (): Pushing STREAMS modules"));
      ioctl (fd_tty, I_PUSH, "ptem");
      ioctl (fd_tty, I_PUSH, "ldterm");
      ioctl (fd_tty, I_PUSH, "ttcompat");
    }
#endif
  /* ---------------------------------------- */
# if defined(TIOCSCTTY)
  fd = ioctl (fd_tty, TIOCSCTTY, NULL);
  D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSCTTY): %d", fd));
# elif defined(TIOCSETCTTY)
  fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
  D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSETCTTY): %d", fd));
# else
  fd = open (ttydev, O_RDWR);
  D_TTY ((stderr, "rxvt_control_tty (): tty open%s", fd < 0 ? " failure" : "ed OK"));
  if (fd >= 0)
    close (fd);
# endif
  /* ---------------------------------------- */
  fd = open ("/dev/tty", O_WRONLY);
  D_TTY ((stderr, "rxvt_control_tty (): do we have controlling tty now: %s", fd < 0 ? "no (fatal)" : "yes (good)"));
  if (fd < 0)
    return -1;          /* fatal */
  close (fd);
  /* ---------------------------------------- */
  D_TTY ((stderr, "rxvt_control_tty (): tcgetpgrp (): %d  getpgrp (): %d", tcgetpgrp (fd_tty), getpgrp ()));
  /* ---------------------------------------- */
#endif                          /* ! __QNX__ */

  return 0;
}
/*----------------------- end-of-file (C source) -----------------------*/
Revision:	1.11
Committed:	Thu Apr 8 20:31:45 2004 UTC (20 years, 1 month ago) by pcg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rel-3_5, rel-3_4, rel-3_3, rel-3_2, rel-2_8, rel-3_0
Changes since 1.10:	+2 -1 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	pcg	1.1	/---------------------------------C----------------------------------
2	pcg	1.11	* File: ptytty.C
3	pcg	1.1	----------------------------------------------------------------------
4			*
5			* All portions of code are copyright by their respective author/s.
6			* Copyright (c) 1999-2001 Geoff Wing <gcw@pobox.com>
7	pcg	1.11	* Copyright (c) 2004 Marc Lehmann <pcg@goof.com>
8	pcg	1.1	*
9			* This program is free software; you can redistribute it and/or modify
10			* it under the terms of the GNU General Public License as published by
11			* the Free Software Foundation; either version 2 of the License, or
12			* (at your option) any later version.
13			*
14			* This program is distributed in the hope that it will be useful,
15			* but WITHOUT ANY WARRANTY; without even the implied warranty of
16			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17			* GNU General Public License for more details.
18			*
19			* You should have received a copy of the GNU General Public License
20			* along with this program; if not, write to the Free Software
21			* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22			---------------------------------------------------------------------/
23
24			#include "../config.h" /* NECESSARY */
25
26			/*
27			* Try to be self-contained except for the above autoconfig'd defines
28			*/
29
30	pcg	1.7	#if 0
31			#ifdef HAVE_GETPT
32			# define _GNU_SOURCE
33			#endif
34			#endif
35
36	pcg	1.8	#include <cstdio>
37	pcg	1.1	#ifdef HAVE_STDLIB_H
38	pcg	1.8	# include <cstdlib>
39	pcg	1.1	#endif
40			#ifdef HAVE_SYS_TYPES_H
41			# include <sys/types.h>
42			#endif
43			#ifdef HAVE_UNISTD_H
44			# include <unistd.h>
45			#endif
46			#if defined(HAVE_STRING_H)
47	pcg	1.8	# include <cstring>
48	pcg	1.1	#endif
49			#ifdef HAVE_FCNTL_H
50			# include <fcntl.h>
51			#endif
52			#ifdef HAVE_SYS_IOCTL_H
53			# include <sys/ioctl.h>
54			#endif
55			#if defined(PTYS_ARE_PTMX) && !defined(__CYGWIN32__)
56			# include <sys/stropts.h> /* for I_PUSH */
57			#endif
58	pcg	1.10	#ifdef HAVE_ISASTREAM
59			# include <stropts.h>
60			#endif
61	pcg	1.1
62			#ifdef DEBUG_TTY
63			# define D_TTY(x) fprintf x ; fputc('\n', stderr) ; fflush(stderr)
64			#else
65			# define D_TTY(x)
66			#endif
67
68			/* ------------------------------------------------------------------------- *
69			* GET PSEUDO TELETYPE - MASTER AND SLAVE *
70			* ------------------------------------------------------------------------- */
71			/*
72			* Returns pty file descriptor, or -1 on failure
73			* If successful, ttydev is set to the name of the slave device.
74			* fd_tty _may_ also be set to an open fd to the slave device
75			*/
76			/* EXTPROTO */
77			int
78	pcg	1.6	rxvt_get_pty (int fd_tty, const char *ttydev)
79	pcg	1.1	{
80	pcg	1.4	int pfd;
81	pcg	1.1
82			#ifdef PTYS_ARE_OPENPTY
83
84	pcg	1.4	char tty_name[sizeof "/dev/pts/????\0"];
85
86	pcg	1.6	if (openpty (&pfd, fd_tty, tty_name, NULL, NULL) != -1)
87	pcg	1.4	{
88	pcg	1.6	*ttydev = strdup (tty_name);
89	pcg	1.4	return pfd;
90	pcg	1.1	}
91			#endif
92
93			#ifdef PTYS_ARE__GETPTY
94	pcg	1.6	*ttydev = _getpty (&pfd, O_RDWR \| O_NONBLOCK \| O_NOCTTY, 0622, 0);
95	pcg	1.4	if (*ttydev != NULL)
96			return pfd;
97	pcg	1.1	#endif
98
99			#ifdef PTYS_ARE_GETPTY
100
101	pcg	1.4	char *ptydev;
102
103	pcg	1.6	while ((ptydev = getpty ()) != NULL)
104			if ((pfd = open (ptydev, O_RDWR \| O_NOCTTY, 0)) >= 0)
105	pcg	1.4	{
106			*ttydev = ptydev;
107			return pfd;
108			}
109	pcg	1.1	#endif
110
111			#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
112			# if defined(PTYS_ARE_GETPT) \|\| defined(PTYS_ARE_PTMX)
113	pcg	1.4
114			{
115	pcg	1.1	# ifdef PTYS_ARE_GETPT
116	pcg	1.6	pfd = getpt ();
117	pcg	1.1	# else
118	pcg	1.4
119	pcg	1.6	pfd = open ("/dev/ptmx", O_RDWR \| O_NOCTTY, 0);
120	pcg	1.1	# endif
121	pcg	1.4
122			if (pfd >= 0)
123			{
124	pcg	1.6	if (grantpt (pfd) == 0 /* change slave permissions */
125			&& unlockpt (pfd) == 0)
126	pcg	1.4	{ /* slave now unlocked */
127	pcg	1.6	ttydev = ptsname (pfd); / get slave's name */
128	pcg	1.4	return pfd;
129			}
130	pcg	1.6	close (pfd);
131	pcg	1.4	}
132			}
133	pcg	1.1	# endif
134			#endif
135
136			#ifdef PTYS_ARE_PTC
137	pcg	1.6	if ((pfd = open ("/dev/ptc", O_RDWR \| O_NOCTTY, 0)) >= 0)
138	pcg	1.4	{
139	pcg	1.6	*ttydev = ttyname (pfd);
140	pcg	1.4	return pfd;
141	pcg	1.1	}
142			#endif
143
144			#ifdef PTYS_ARE_CLONE
145	pcg	1.6	if ((pfd = open ("/dev/ptym/clone", O_RDWR \| O_NOCTTY, 0)) >= 0)
146	pcg	1.4	{
147	pcg	1.6	*ttydev = ptsname (pfd);
148	pcg	1.4	return pfd;
149	pcg	1.1	}
150			#endif
151
152			#ifdef PTYS_ARE_NUMERIC
153	pcg	1.4	{
154			int idx;
155			char c1, c2;
156			char pty_name[] = "/dev/ptyp???";
157			char tty_name[] = "/dev/ttyp???";
158
159	pcg	1.6	c1 = & (pty_name[sizeof (pty_name) - 4]);
160			c2 = & (tty_name[sizeof (tty_name) - 4]);
161	pcg	1.4	for (idx = 0; idx < 256; idx++)
162			{
163	pcg	1.6	sprintf (c1, "%d", idx);
164			sprintf (c2, "%d", idx);
165			if (access (tty_name, F_OK) < 0)
166	pcg	1.4	{
167			idx = 256;
168			break;
169			}
170	pcg	1.6	if ((pfd = open (pty_name, O_RDWR \| O_NOCTTY, 0)) >= 0)
171	pcg	1.4	{
172	pcg	1.6	if (access (tty_name, R_OK \| W_OK) == 0)
173	pcg	1.4	{
174	pcg	1.6	*ttydev = strdup (tty_name);
175	pcg	1.4	return pfd;
176			}
177	pcg	1.6	close (pfd);
178	pcg	1.4	}
179			}
180			}
181	pcg	1.1	#endif
182			#ifdef PTYS_ARE_SEARCHED
183	pcg	1.4	{
184			const char c1, c2;
185			char pty_name[] = "/dev/pty??";
186			char tty_name[] = "/dev/tty??";
187	pcg	1.1
188			# ifndef PTYCHAR1
189			# define PTYCHAR1 "pqrstuvwxyz"
190			# endif
191			# ifndef PTYCHAR2
192			# define PTYCHAR2 "0123456789abcdef"
193			# endif
194	pcg	1.4
195			for (c1 = PTYCHAR1; *c1; c1++)
196			{
197	pcg	1.6	pty_name[ (sizeof (pty_name) - 3)] =
198			tty_name[ (sizeof (pty_name) - 3)] = *c1;
199	pcg	1.4	for (c2 = PTYCHAR2; *c2; c2++)
200			{
201	pcg	1.6	pty_name[ (sizeof (pty_name) - 2)] =
202			tty_name[ (sizeof (pty_name) - 2)] = *c2;
203			if ((pfd = open (pty_name, O_RDWR \| O_NOCTTY, 0)) >= 0)
204	pcg	1.4	{
205	pcg	1.6	if (access (tty_name, R_OK \| W_OK) == 0)
206	pcg	1.4	{
207	pcg	1.6	*ttydev = strdup (tty_name);
208	pcg	1.4	return pfd;
209			}
210	pcg	1.6	close (pfd);
211	pcg	1.4	}
212			}
213			}
214			}
215	pcg	1.1	#endif
216	pcg	1.4	return -1;
217	pcg	1.1	}
218
219			/----------------------------------------------------------------------/
220			/*
221			* Returns tty file descriptor, or -1 on failure
222			*/
223			/* EXTPROTO */
224			int
225	pcg	1.4	rxvt_get_tty (const char *ttydev)
226	pcg	1.1	{
227	pcg	1.4	return open (ttydev, O_RDWR \| O_NOCTTY, 0);
228	pcg	1.1	}
229
230			/----------------------------------------------------------------------/
231			/*
232			* Make our tty a controlling tty so that /dev/tty points to us
233			*/
234			/* EXTPROTO */
235			int
236	pcg	1.4	rxvt_control_tty (int fd_tty, const char *ttydev)
237	pcg	1.1	{
238			#ifndef __QNX__
239	pcg	1.4	int fd;
240	pcg	1.1
241	pcg	1.6	D_TTY ((stderr, "rxvt_control_tty (): pid: %d, tty fd: %d, dev: %s", getpid (), fd_tty, ttydev));
242	pcg	1.4	/* ---------------------------------------- */
243	pcg	1.1	# ifdef HAVE_SETSID
244	pcg	1.4	setsid ();
245	pcg	1.1	# endif
246			# if defined(HAVE_SETPGID)
247	pcg	1.4	setpgid (0, 0);
248	pcg	1.1	# elif defined(HAVE_SETPGRP)
249	pcg	1.4	setpgrp (0, 0);
250	pcg	1.1	# endif
251	pcg	1.4	/* ---------------------------------------- */
252	pcg	1.1	# ifdef TIOCNOTTY
253	pcg	1.4
254			fd = open ("/dev/tty", O_RDWR \| O_NOCTTY);
255	pcg	1.6	D_TTY ((stderr, "rxvt_control_tty (): Voiding tty associations: previous=%s", fd < 0 ? "no" : "yes"));
256	pcg	1.4	if (fd >= 0)
257			{
258			ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
259			close (fd);
260	pcg	1.1	}
261			# endif
262	pcg	1.4	/* ---------------------------------------- */
263			fd = open ("/dev/tty", O_RDWR \| O_NOCTTY);
264	pcg	1.6	D_TTY ((stderr, "rxvt_control_tty (): /dev/tty has controlling tty? %s", fd < 0 ? "no (good)" : "yes (bad)"));
265	pcg	1.4	if (fd >= 0)
266			close (fd); /* ouch: still have controlling tty */
267			/* ---------------------------------------- */
268	pcg	1.1	#if defined(PTYS_ARE_PTMX) && defined(I_PUSH)
269	pcg	1.4	/*
270			* Push STREAMS modules:
271			* ptem: pseudo-terminal hardware emulation module.
272			* ldterm: standard terminal line discipline.
273			* ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
274			*
275	pcg	1.6	* After we push the STREAMS modules, the first open () on the slave side
276	pcg	1.4	* (i.e. the next section between the dashes giving us "tty opened OK")
277			* should make the "ptem" (or "ldterm" depending upon either which OS
278			* version or which set of manual pages you have) module give us a
279	pcg	1.6	* controlling terminal. We must already have close ()d the master side
280	pcg	1.4	* fd in this child process before we push STREAMS modules on because the
281	pcg	1.6	* documentation is really unclear about whether it is any close () on
282			* the master side or the last close () - i.e. a proper STREAMS dismantling
283			* close () - on the master side which causes a hang up to be sent
284	pcg	1.4	* through - Geoff Wing
285			*/
286	pcg	1.1	# ifdef HAVE_ISASTREAM
287	pcg	1.4	if (isastream (fd_tty) == 1)
288	pcg	1.1	# endif
289			{
290	pcg	1.6	D_TTY ((stderr, "rxvt_control_tty (): Pushing STREAMS modules"));
291	pcg	1.4	ioctl (fd_tty, I_PUSH, "ptem");
292			ioctl (fd_tty, I_PUSH, "ldterm");
293			ioctl (fd_tty, I_PUSH, "ttcompat");
294	pcg	1.1	}
295			#endif
296	pcg	1.4	/* ---------------------------------------- */
297	pcg	1.1	# if defined(TIOCSCTTY)
298	pcg	1.4	fd = ioctl (fd_tty, TIOCSCTTY, NULL);
299	pcg	1.6	D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSCTTY): %d", fd));
300	pcg	1.1	# elif defined(TIOCSETCTTY)
301	pcg	1.4	fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
302	pcg	1.6	D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSETCTTY): %d", fd));
303	pcg	1.1	# else
304	pcg	1.4	fd = open (ttydev, O_RDWR);
305	pcg	1.6	D_TTY ((stderr, "rxvt_control_tty (): tty open%s", fd < 0 ? " failure" : "ed OK"));
306	pcg	1.4	if (fd >= 0)
307	pcg	1.6	close (fd);
308	pcg	1.1	# endif
309	pcg	1.4	/* ---------------------------------------- */
310			fd = open ("/dev/tty", O_WRONLY);
311	pcg	1.6	D_TTY ((stderr, "rxvt_control_tty (): do we have controlling tty now: %s", fd < 0 ? "no (fatal)" : "yes (good)"));
312	pcg	1.4	if (fd < 0)
313			return -1; /* fatal */
314			close (fd);
315			/* ---------------------------------------- */
316	pcg	1.6	D_TTY ((stderr, "rxvt_control_tty (): tcgetpgrp (): %d getpgrp (): %d", tcgetpgrp (fd_tty), getpgrp ()));
317	pcg	1.4	/* ---------------------------------------- */
318	pcg	1.1	#endif /* ! __QNX__ */
319	pcg	1.4
320			return 0;
321	pcg	1.1	}
322			/----------------------- end-of-file (C source) -----------------------/