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) 2004-2006 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 */
#include "rxvt.h"

# include <cstdlib>
# include <cstring>

#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#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(HAVE_SYS_STROPTS_H)
# include <sys/stropts.h>      /* for I_PUSH */
#endif
#ifdef HAVE_ISASTREAM
# include <stropts.h>
#endif
#if defined(HAVE_PTY_H)
# include <pty.h>
#elif defined(HAVE_LIBUTIL_H)
# include <libutil.h>
#elif defined(HAVE_UTIL_H)
# include <util.h>
#endif

#include <cstdio>
#include <grp.h>

/////////////////////////////////////////////////////////////////////////////

/* ------------------------------------------------------------------------- *
 *                  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
 */
static int
get_pty (int *fd_tty, char **ttydev)
{
  int pfd;

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

  rxvt_privileges(RESTORE);
  int res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
  rxvt_privileges(IGNORE);

  if (res != -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

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

  {
#  ifdef PTYS_ARE_GETPT
    pfd = getpt();
#  else
#  ifdef PTYS_ARE_POSIX
    pfd = posix_openpt (O_RDWR);
#  else
    pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
#  endif
#  endif

    if (pfd >= 0)
      {
        if (grantpt (pfd) == 0  /* change slave permissions */
            && unlockpt (pfd) == 0)
          {     /* slave now unlocked */
            *ttydev = strdup (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 = strdup (ttyname (pfd));
      return pfd;
    }
#endif

#ifdef PTYS_ARE_CLONE
  if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
    {
      *ttydev = strdup (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 
 */
static int
get_tty (char *ttydev)
{
  return open (ttydev, O_RDWR | O_NOCTTY, 0);
}

/*----------------------------------------------------------------------*/
/*
 * Make our tty a controlling tty so that /dev/tty points to us
 */
static int
control_tty (int fd_tty)
{
  int fd;

  /* ---------------------------------------- */
# 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);
  if (fd >= 0)
    {
      ioctl (fd, TIOCNOTTY, NULL);      /* void tty associations */
      close (fd);
    }
# endif

  /* ---------------------------------------- */
  fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
  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
    {
      ioctl (fd_tty, I_PUSH, "ptem");
      ioctl (fd_tty, I_PUSH, "ldterm");
      ioctl (fd_tty, I_PUSH, "ttcompat");
    }
# endif
  /* ---------------------------------------- */
  fd = ioctl (fd_tty, TIOCSCTTY, NULL);
  /* ---------------------------------------- */
  fd = open ("/dev/tty", O_WRONLY);
  if (fd < 0)
    return -1;          /* fatal */
  close (fd);
  /* ---------------------------------------- */

  return 0;
}

void
rxvt_ptytty::close_tty ()
{
  if (tty < 0)
    return;

  close (tty);
  tty = -1;
}

bool
rxvt_ptytty::make_controlling_tty ()
{
  return control_tty (tty) >= 0;
}

void
rxvt_ptytty::set_utf8_mode (bool on)
{
#ifdef IUTF8
  if (pty < 0)
    return;

  struct termios tio;

  if (tcgetattr (pty, &tio) != -1)
    {
      tcflag_t new_cflag = tio.c_iflag;

      if (on)
        new_cflag |= IUTF8;
      else
        new_cflag &= ~IUTF8;

      if (new_cflag != tio.c_iflag)
        {
          tio.c_iflag = new_cflag;
          tcsetattr (pty, TCSANOW, &tio);
        }
    }
#endif
}

/////////////////////////////////////////////////////////////////////////////

#ifndef NO_SETOWNER_TTYDEV
static struct ttyconf {
  gid_t gid;
  mode_t mode;

  ttyconf ()
    {
#ifdef TTY_GID_SUPPORT
      struct group *gr = getgrnam ("tty");

      if (gr)
        {           /* change group ownership of tty to "tty" */
          mode = S_IRUSR | S_IWUSR | S_IWGRP;
          gid = gr->gr_gid;
        }
      else
#endif                          /* TTY_GID_SUPPORT */
        {
          mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
          gid = getgid ();
        }
    }
} ttyconf;

/////////////////////////////////////////////////////////////////////////////

void
rxvt_ptytty_unix::privileges (rxvt_privaction action)
{
  if (!name || !*name)
    return;

  rxvt_privileges (RESTORE);

  if (action == SAVE)
    {
# ifndef RESET_TTY_TO_COMMON_DEFAULTS
      /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
      if (lstat (name, &savestat) < 0)       /* you lose out */
        ;
      else
# endif
        {
          saved = true;
          chown (name, getuid (), ttyconf.gid);      /* fail silently */
          chmod (name, ttyconf.mode);
# ifdef HAVE_REVOKE
          revoke (name);
# endif
        }
    }
  else
    {                    /* action == RESTORE */
# ifndef RESET_TTY_TO_COMMON_DEFAULTS
      if (saved)
        {
          chmod (name, savestat.st_mode);
          chown (name, savestat.st_uid, savestat.st_gid);
        }
# else
      chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
      chown (name, 0, 0);
# endif

    }

  rxvt_privileges (IGNORE);
}
#endif

rxvt_ptytty_unix::rxvt_ptytty_unix ()
{
  pty = tty = -1;
  name = 0;
#ifndef NO_SETOWNER_TTYDEV
  saved = false;
#endif
#if UTMP_SUPPORT
  cmd_pid = 0;
#endif
}

rxvt_ptytty_unix::~rxvt_ptytty_unix ()
{
  logout ();
  put ();
}

void
rxvt_ptytty_unix::put ()
{
#ifndef NO_SETOWNER_TTYDEV
  privileges (RESTORE);
#endif

  if (pty >= 0) close (pty);
  close_tty ();
  free (name);

  pty = tty = -1;
  name = 0;
}

bool
rxvt_ptytty_unix::get ()
{
  /* get master (pty) */
  if ((pty = get_pty (&tty, &name)) < 0)
    return false;

  fcntl (pty, F_SETFL, O_NONBLOCK);

  /* get slave (tty) */
  if (tty < 0)
    {
#ifndef NO_SETOWNER_TTYDEV
      privileges (SAVE);
#endif

      if ((tty = get_tty (name)) < 0)
        {
          put ();
          return false;
        }
    }

  return true;
}

/*----------------------- end-of-file (C source) -----------------------*/

Revision:	1.37
Committed:	Tue Jan 17 11:02:10 2006 UTC (18 years, 4 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.36:	+0 -2 lines
Log Message:	* empty log message *
#	Content
1	/---------------------------------C----------------------------------
2	* File: ptytty.C
3	----------------------------------------------------------------------
4	*
5	* All portions of code are copyright by their respective author/s.
6	* Copyright (c) 1999-2001 Geoff Wing <gcw@pobox.com>
7	* Copyright (c) 2004-2006 Marc Lehmann <pcg@goof.com>
8	*
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	#include "rxvt.h"
26
27	# include <cstdlib>
28	# include <cstring>
29
30	#ifdef HAVE_SYS_TYPES_H
31	# include <sys/types.h>
32	#endif
33	#ifdef HAVE_UNISTD_H
34	# include <unistd.h>
35	#endif
36	#ifdef HAVE_FCNTL_H
37	# include <fcntl.h>
38	#endif
39	#ifdef HAVE_SYS_IOCTL_H
40	# include <sys/ioctl.h>
41	#endif
42	#if defined(PTYS_ARE_PTMX) && defined(HAVE_SYS_STROPTS_H)
43	# include <sys/stropts.h> /* for I_PUSH */
44	#endif
45	#ifdef HAVE_ISASTREAM
46	# include <stropts.h>
47	#endif
48	#if defined(HAVE_PTY_H)
49	# include <pty.h>
50	#elif defined(HAVE_LIBUTIL_H)
51	# include <libutil.h>
52	#elif defined(HAVE_UTIL_H)
53	# include <util.h>
54	#endif
55
56	#include <cstdio>
57	#include <grp.h>
58
59	/////////////////////////////////////////////////////////////////////////////
60
61	/* ------------------------------------------------------------------------- *
62	* GET PSEUDO TELETYPE - MASTER AND SLAVE *
63	* ------------------------------------------------------------------------- */
64	/*
65	* Returns pty file descriptor, or -1 on failure
66	* If successful, ttydev is set to the name of the slave device.
67	* fd_tty _may_ also be set to an open fd to the slave device
68	*/
69	static int
70	get_pty (int fd_tty, char *ttydev)
71	{
72	int pfd;
73
74	#ifdef PTYS_ARE_OPENPTY
75	char tty_name[sizeof "/dev/pts/????\0"];
76
77	rxvt_privileges(RESTORE);
78	int res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
79	rxvt_privileges(IGNORE);
80
81	if (res != -1)
82	{
83	*ttydev = strdup (tty_name);
84	return pfd;
85	}
86	#endif
87
88	#ifdef PTYS_ARE__GETPTY
89	*ttydev = _getpty (&pfd, O_RDWR \| O_NONBLOCK \| O_NOCTTY, 0622, 0);
90	if (*ttydev != NULL)
91	return pfd;
92	#endif
93
94	#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
95	# if defined(PTYS_ARE_GETPT) \|\| defined(PTYS_ARE_POSIX) \|\| defined(PTYS_ARE_PTMX)
96
97	{
98	# ifdef PTYS_ARE_GETPT
99	pfd = getpt();
100	# else
101	# ifdef PTYS_ARE_POSIX
102	pfd = posix_openpt (O_RDWR);
103	# else
104	pfd = open ("/dev/ptmx", O_RDWR \| O_NOCTTY, 0);
105	# endif
106	# endif
107
108	if (pfd >= 0)
109	{
110	if (grantpt (pfd) == 0 /* change slave permissions */
111	&& unlockpt (pfd) == 0)
112	{ /* slave now unlocked */
113	ttydev = strdup (ptsname (pfd)); / get slave's name */
114	return pfd;
115	}
116	close (pfd);
117	}
118	}
119	# endif
120	#endif
121
122	#ifdef PTYS_ARE_PTC
123	if ((pfd = open ("/dev/ptc", O_RDWR \| O_NOCTTY, 0)) >= 0)
124	{
125	*ttydev = strdup (ttyname (pfd));
126	return pfd;
127	}
128	#endif
129
130	#ifdef PTYS_ARE_CLONE
131	if ((pfd = open ("/dev/ptym/clone", O_RDWR \| O_NOCTTY, 0)) >= 0)
132	{
133	*ttydev = strdup (ptsname (pfd));
134	return pfd;
135	}
136	#endif
137
138	#ifdef PTYS_ARE_NUMERIC
139	{
140	int idx;
141	char c1, c2;
142	char pty_name[] = "/dev/ptyp???";
143	char tty_name[] = "/dev/ttyp???";
144
145	c1 = &(pty_name[sizeof (pty_name) - 4]);
146	c2 = &(tty_name[sizeof (tty_name) - 4]);
147	for (idx = 0; idx < 256; idx++)
148	{
149	sprintf (c1, "%d", idx);
150	sprintf (c2, "%d", idx);
151	if (access (tty_name, F_OK) < 0)
152	{
153	idx = 256;
154	break;
155	}
156
157	if ((pfd = open (pty_name, O_RDWR \| O_NOCTTY, 0)) >= 0)
158	{
159	if (access (tty_name, R_OK \| W_OK) == 0)
160	{
161	*ttydev = strdup (tty_name);
162	return pfd;
163	}
164
165	close (pfd);
166	}
167	}
168	}
169	#endif
170
171	#ifdef PTYS_ARE_SEARCHED
172	{
173	const char c1, c2;
174	char pty_name[] = "/dev/pty??";
175	char tty_name[] = "/dev/tty??";
176
177	# ifndef PTYCHAR1
178	# define PTYCHAR1 "pqrstuvwxyz"
179	# endif
180	# ifndef PTYCHAR2
181	# define PTYCHAR2 "0123456789abcdef"
182	# endif
183
184	for (c1 = PTYCHAR1; *c1; c1++)
185	{
186	pty_name[ (sizeof (pty_name) - 3)] =
187	tty_name[ (sizeof (pty_name) - 3)] = *c1;
188	for (c2 = PTYCHAR2; *c2; c2++)
189	{
190	pty_name[ (sizeof (pty_name) - 2)] =
191	tty_name[ (sizeof (pty_name) - 2)] = *c2;
192	if ((pfd = open (pty_name, O_RDWR \| O_NOCTTY, 0)) >= 0)
193	{
194	if (access (tty_name, R_OK \| W_OK) == 0)
195	{
196	*ttydev = strdup (tty_name);
197	return pfd;
198	}
199
200	close (pfd);
201	}
202	}
203	}
204	}
205	#endif
206
207	return -1;
208	}
209
210	/----------------------------------------------------------------------/
211	/*
212	* Returns tty file descriptor, or -1 on failure
213	*/
214	static int
215	get_tty (char *ttydev)
216	{
217	return open (ttydev, O_RDWR \| O_NOCTTY, 0);
218	}
219
220	/----------------------------------------------------------------------/
221	/*
222	* Make our tty a controlling tty so that /dev/tty points to us
223	*/
224	static int
225	control_tty (int fd_tty)
226	{
227	int fd;
228
229	/* ---------------------------------------- */
230	# ifdef HAVE_SETSID
231	setsid ();
232	# endif
233	# if defined(HAVE_SETPGID)
234	setpgid (0, 0);
235	# elif defined(HAVE_SETPGRP)
236	setpgrp (0, 0);
237	# endif
238
239	/* ---------------------------------------- */
240	# ifdef TIOCNOTTY
241	fd = open ("/dev/tty", O_RDWR \| O_NOCTTY);
242	if (fd >= 0)
243	{
244	ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
245	close (fd);
246	}
247	# endif
248
249	/* ---------------------------------------- */
250	fd = open ("/dev/tty", O_RDWR \| O_NOCTTY);
251	if (fd >= 0)
252	close (fd); /* ouch: still have controlling tty */
253
254	/* ---------------------------------------- */
255	# if defined(PTYS_ARE_PTMX) && defined(I_PUSH)
256	/*
257	* Push STREAMS modules:
258	* ptem: pseudo-terminal hardware emulation module.
259	* ldterm: standard terminal line discipline.
260	* ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
261	*
262	* After we push the STREAMS modules, the first open () on the slave side
263	* (i.e. the next section between the dashes giving us "tty opened OK")
264	* should make the "ptem" (or "ldterm" depending upon either which OS
265	* version or which set of manual pages you have) module give us a
266	* controlling terminal. We must already have close ()d the master side
267	* fd in this child process before we push STREAMS modules on because the
268	* documentation is really unclear about whether it is any close () on
269	* the master side or the last close () - i.e. a proper STREAMS dismantling
270	* close () - on the master side which causes a hang up to be sent
271	* through - Geoff Wing
272	*/
273	# ifdef HAVE_ISASTREAM
274	if (isastream (fd_tty) == 1)
275	# endif
276	{
277	ioctl (fd_tty, I_PUSH, "ptem");
278	ioctl (fd_tty, I_PUSH, "ldterm");
279	ioctl (fd_tty, I_PUSH, "ttcompat");
280	}
281	# endif
282	/* ---------------------------------------- */
283	fd = ioctl (fd_tty, TIOCSCTTY, NULL);
284	/* ---------------------------------------- */
285	fd = open ("/dev/tty", O_WRONLY);
286	if (fd < 0)
287	return -1; /* fatal */
288	close (fd);
289	/* ---------------------------------------- */
290
291	return 0;
292	}
293
294	void
295	rxvt_ptytty::close_tty ()
296	{
297	if (tty < 0)
298	return;
299
300	close (tty);
301	tty = -1;
302	}
303
304	bool
305	rxvt_ptytty::make_controlling_tty ()
306	{
307	return control_tty (tty) >= 0;
308	}
309
310	void
311	rxvt_ptytty::set_utf8_mode (bool on)
312	{
313	#ifdef IUTF8
314	if (pty < 0)
315	return;
316
317	struct termios tio;
318
319	if (tcgetattr (pty, &tio) != -1)
320	{
321	tcflag_t new_cflag = tio.c_iflag;
322
323	if (on)
324	new_cflag \|= IUTF8;
325	else
326	new_cflag &= ~IUTF8;
327
328	if (new_cflag != tio.c_iflag)
329	{
330	tio.c_iflag = new_cflag;
331	tcsetattr (pty, TCSANOW, &tio);
332	}
333	}
334	#endif
335	}
336
337	/////////////////////////////////////////////////////////////////////////////
338
339	#ifndef NO_SETOWNER_TTYDEV
340	static struct ttyconf {
341	gid_t gid;
342	mode_t mode;
343
344	ttyconf ()
345	{
346	#ifdef TTY_GID_SUPPORT
347	struct group *gr = getgrnam ("tty");
348
349	if (gr)
350	{ /* change group ownership of tty to "tty" */
351	mode = S_IRUSR \| S_IWUSR \| S_IWGRP;
352	gid = gr->gr_gid;
353	}
354	else
355	#endif /* TTY_GID_SUPPORT */
356	{
357	mode = S_IRUSR \| S_IWUSR \| S_IWGRP \| S_IWOTH;
358	gid = getgid ();
359	}
360	}
361	} ttyconf;
362
363	/////////////////////////////////////////////////////////////////////////////
364
365	void
366	rxvt_ptytty_unix::privileges (rxvt_privaction action)
367	{
368	if (!name \|\| !*name)
369	return;
370
371	rxvt_privileges (RESTORE);
372
373	if (action == SAVE)
374	{
375	# ifndef RESET_TTY_TO_COMMON_DEFAULTS
376	/* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
377	if (lstat (name, &savestat) < 0) /* you lose out */
378	;
379	else
380	# endif
381	{
382	saved = true;
383	chown (name, getuid (), ttyconf.gid); /* fail silently */
384	chmod (name, ttyconf.mode);
385	# ifdef HAVE_REVOKE
386	revoke (name);
387	# endif
388	}
389	}
390	else
391	{ /* action == RESTORE */
392	# ifndef RESET_TTY_TO_COMMON_DEFAULTS
393	if (saved)
394	{
395	chmod (name, savestat.st_mode);
396	chown (name, savestat.st_uid, savestat.st_gid);
397	}
398	# else
399	chmod (name, (S_IRUSR \| S_IWUSR \| S_IRGRP \| S_IWGRP \| S_IROTH \| S_IWOTH));
400	chown (name, 0, 0);
401	# endif
402
403	}
404
405	rxvt_privileges (IGNORE);
406	}
407	#endif
408
409	rxvt_ptytty_unix::rxvt_ptytty_unix ()
410	{
411	pty = tty = -1;
412	name = 0;
413	#ifndef NO_SETOWNER_TTYDEV
414	saved = false;
415	#endif
416	#if UTMP_SUPPORT
417	cmd_pid = 0;
418	#endif
419	}
420
421	rxvt_ptytty_unix::~rxvt_ptytty_unix ()
422	{
423	logout ();
424	put ();
425	}
426
427	void
428	rxvt_ptytty_unix::put ()
429	{
430	#ifndef NO_SETOWNER_TTYDEV
431	privileges (RESTORE);
432	#endif
433
434	if (pty >= 0) close (pty);
435	close_tty ();
436	free (name);
437
438	pty = tty = -1;
439	name = 0;
440	}
441
442	bool
443	rxvt_ptytty_unix::get ()
444	{
445	/* get master (pty) */
446	if ((pty = get_pty (&tty, &name)) < 0)
447	return false;
448
449	fcntl (pty, F_SETFL, O_NONBLOCK);
450
451	/* get slave (tty) */
452	if (tty < 0)
453	{
454	#ifndef NO_SETOWNER_TTYDEV
455	privileges (SAVE);
456	#endif
457
458	if ((tty = get_tty (name)) < 0)
459	{
460	put ();
461	return false;
462	}
463	}
464
465	return true;
466	}
467
468	/----------------------- end-of-file (C source) -----------------------/
469