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 */
#include "rxvt.h"

#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(HAVE_SYS_STROPTS_H)
# include <sys/stropts.h>      /* for I_PUSH */
#endif
#ifdef HAVE_ISASTREAM
# include <stropts.h>
#endif

#if defined( __FreeBSD__)
// better do this via configure, but....
# include <libutil.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"];

  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 = 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, const char *ttydev)
{
#ifndef __QNX__
  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
  /* ---------------------------------------- */
# if defined(TIOCSCTTY)
  fd = ioctl (fd_tty, TIOCSCTTY, NULL);
# elif defined(TIOCSETCTTY)
  fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
# else
  fd = open (ttydev, O_RDWR);
  if (fd >= 0)
    close (fd);
# endif
  /* ---------------------------------------- */
  fd = open ("/dev/tty", O_WRONLY);
  if (fd < 0)
    return -1;          /* fatal */
  close (fd);
  /* ---------------------------------------- */
#endif                          /* ! __QNX__ */

  return 0;
}

#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::privileges (rxvt_privaction action)
{
  rxvt_privileges (RESTORE);

  if (action == SAVE)
    {
      //next_tty_action = RESTORE;
# 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 */
        ;//next_tty_action = IGNORE;
      else
# endif

        {
          chown (name, getuid (), ttyconf.gid);      /* fail silently */
          chmod (name, ttyconf.mode);
# ifdef HAVE_REVOKE
          revoke (name);
# endif

        }
    }
  else
    {                    /* action == RESTORE */
      //next_tty_action = IGNORE;
# ifndef RESET_TTY_TO_COMMON_DEFAULTS
      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::rxvt_ptytty ()
{
  pty = tty = -1;
  name = 0;
}

rxvt_ptytty::~rxvt_ptytty ()
{
  put ();
}

void

rxvt_ptytty::close_tty ()
{
  if (tty >= 0) close (tty);
  tty = -1;
}

void
rxvt_ptytty::put ()
{
#ifndef NO_SETOWNER_TTYDEV
  if (tty >= 0)
    privileges (RESTORE);
#endif

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

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

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

bool
rxvt_ptytty::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:	1.16
Committed:	Sun Aug 15 03:30:04 2004 UTC (19 years, 9 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rel-3_7, rel-3_8, rel-4_0
Changes since 1.12:	+167 -49 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 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	#ifdef HAVE_STDLIB_H
28	# include <cstdlib>
29	#endif
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	#if defined(HAVE_STRING_H)
37	# include <cstring>
38	#endif
39	#ifdef HAVE_FCNTL_H
40	# include <fcntl.h>
41	#endif
42	#ifdef HAVE_SYS_IOCTL_H
43	# include <sys/ioctl.h>
44	#endif
45	#if defined(PTYS_ARE_PTMX) && defined(HAVE_SYS_STROPTS_H)
46	# include <sys/stropts.h> /* for I_PUSH */
47	#endif
48	#ifdef HAVE_ISASTREAM
49	# include <stropts.h>
50	#endif
51
52	#if defined( __FreeBSD__)
53	// better do this via configure, but....
54	# include <libutil.h>
55	#endif
56
57	#include <cstdio>
58	#include <grp.h>
59
60	/* ------------------------------------------------------------------------- *
61	* GET PSEUDO TELETYPE - MASTER AND SLAVE *
62	* ------------------------------------------------------------------------- */
63	/*
64	* Returns pty file descriptor, or -1 on failure
65	* If successful, ttydev is set to the name of the slave device.
66	* fd_tty _may_ also be set to an open fd to the slave device
67	*/
68	static int
69	get_pty (int fd_tty, char *ttydev)
70	{
71	int pfd;
72
73	#ifdef PTYS_ARE_OPENPTY
74	char tty_name[sizeof "/dev/pts/????\0"];
75
76	if (openpty (&pfd, fd_tty, tty_name, NULL, NULL) != -1)
77	{
78	*ttydev = strdup (tty_name);
79	return pfd;
80	}
81	#endif
82
83	#ifdef PTYS_ARE__GETPTY
84	*ttydev = _getpty (&pfd, O_RDWR \| O_NONBLOCK \| O_NOCTTY, 0622, 0);
85	if (*ttydev != NULL)
86	return pfd;
87	#endif
88
89	#ifdef PTYS_ARE_GETPTY
90
91	char *ptydev;
92
93	while ((ptydev = getpty ()) != NULL)
94	if ((pfd = open (ptydev, O_RDWR \| O_NOCTTY, 0)) >= 0)
95	{
96	*ttydev = ptydev;
97	return pfd;
98	}
99	#endif
100
101	#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
102	# if defined(PTYS_ARE_GETPT) \|\| defined(PTYS_ARE_PTMX)
103
104	{
105	# ifdef PTYS_ARE_GETPT
106	pfd = getpt ();
107	# else
108	pfd = open ("/dev/ptmx", O_RDWR \| O_NOCTTY, 0);
109	# endif
110
111	if (pfd >= 0)
112	{
113	if (grantpt (pfd) == 0 /* change slave permissions */
114	&& unlockpt (pfd) == 0)
115	{ /* slave now unlocked */
116	ttydev = strdup (ptsname (pfd)); / get slave's name */
117	return pfd;
118	}
119	close (pfd);
120	}
121	}
122	# endif
123	#endif
124
125	#ifdef PTYS_ARE_PTC
126	if ((pfd = open ("/dev/ptc", O_RDWR \| O_NOCTTY, 0)) >= 0)
127	{
128	*ttydev = strdup (ttyname (pfd));
129	return pfd;
130	}
131	#endif
132
133	#ifdef PTYS_ARE_CLONE
134	if ((pfd = open ("/dev/ptym/clone", O_RDWR \| O_NOCTTY, 0)) >= 0)
135	{
136	*ttydev = strdup (ptsname (pfd));
137	return pfd;
138	}
139	#endif
140
141	#ifdef PTYS_ARE_NUMERIC
142	{
143	int idx;
144	char c1, c2;
145	char pty_name[] = "/dev/ptyp???";
146	char tty_name[] = "/dev/ttyp???";
147
148	c1 = &(pty_name[sizeof (pty_name) - 4]);
149	c2 = &(tty_name[sizeof (tty_name) - 4]);
150	for (idx = 0; idx < 256; idx++)
151	{
152	sprintf (c1, "%d", idx);
153	sprintf (c2, "%d", idx);
154	if (access (tty_name, F_OK) < 0)
155	{
156	idx = 256;
157	break;
158	}
159
160	if ((pfd = open (pty_name, O_RDWR \| O_NOCTTY, 0)) >= 0)
161	{
162	if (access (tty_name, R_OK \| W_OK) == 0)
163	{
164	*ttydev = strdup (tty_name);
165	return pfd;
166	}
167
168	close (pfd);
169	}
170	}
171	}
172	#endif
173
174	#ifdef PTYS_ARE_SEARCHED
175	{
176	const char c1, c2;
177	char pty_name[] = "/dev/pty??";
178	char tty_name[] = "/dev/tty??";
179
180	# ifndef PTYCHAR1
181	# define PTYCHAR1 "pqrstuvwxyz"
182	# endif
183	# ifndef PTYCHAR2
184	# define PTYCHAR2 "0123456789abcdef"
185	# endif
186
187	for (c1 = PTYCHAR1; *c1; c1++)
188	{
189	pty_name[ (sizeof (pty_name) - 3)] =
190	tty_name[ (sizeof (pty_name) - 3)] = *c1;
191	for (c2 = PTYCHAR2; *c2; c2++)
192	{
193	pty_name[ (sizeof (pty_name) - 2)] =
194	tty_name[ (sizeof (pty_name) - 2)] = *c2;
195	if ((pfd = open (pty_name, O_RDWR \| O_NOCTTY, 0)) >= 0)
196	{
197	if (access (tty_name, R_OK \| W_OK) == 0)
198	{
199	*ttydev = strdup (tty_name);
200	return pfd;
201	}
202
203	close (pfd);
204	}
205	}
206	}
207	}
208	#endif
209
210	return -1;
211	}
212
213	/----------------------------------------------------------------------/
214	/*
215	* Returns tty file descriptor, or -1 on failure
216	*/
217	static int
218	get_tty (char *ttydev)
219	{
220	return open (ttydev, O_RDWR \| O_NOCTTY, 0);
221	}
222
223	/----------------------------------------------------------------------/
224	/*
225	* Make our tty a controlling tty so that /dev/tty points to us
226	*/
227	static int
228	control_tty (int fd_tty, const char *ttydev)
229	{
230	#ifndef __QNX__
231	int fd;
232
233	/* ---------------------------------------- */
234	# ifdef HAVE_SETSID
235	setsid ();
236	# endif
237	# if defined(HAVE_SETPGID)
238	setpgid (0, 0);
239	# elif defined(HAVE_SETPGRP)
240	setpgrp (0, 0);
241	# endif
242
243	/* ---------------------------------------- */
244	# ifdef TIOCNOTTY
245	fd = open ("/dev/tty", O_RDWR \| O_NOCTTY);
246	if (fd >= 0)
247	{
248	ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
249	close (fd);
250	}
251	# endif
252
253	/* ---------------------------------------- */
254	fd = open ("/dev/tty", O_RDWR \| O_NOCTTY);
255	if (fd >= 0)
256	close (fd); /* ouch: still have controlling tty */
257
258	/* ---------------------------------------- */
259	#if defined(PTYS_ARE_PTMX) && defined(I_PUSH)
260	/*
261	* Push STREAMS modules:
262	* ptem: pseudo-terminal hardware emulation module.
263	* ldterm: standard terminal line discipline.
264	* ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
265	*
266	* After we push the STREAMS modules, the first open () on the slave side
267	* (i.e. the next section between the dashes giving us "tty opened OK")
268	* should make the "ptem" (or "ldterm" depending upon either which OS
269	* version or which set of manual pages you have) module give us a
270	* controlling terminal. We must already have close ()d the master side
271	* fd in this child process before we push STREAMS modules on because the
272	* documentation is really unclear about whether it is any close () on
273	* the master side or the last close () - i.e. a proper STREAMS dismantling
274	* close () - on the master side which causes a hang up to be sent
275	* through - Geoff Wing
276	*/
277	# ifdef HAVE_ISASTREAM
278	if (isastream (fd_tty) == 1)
279	# endif
280	{
281	ioctl (fd_tty, I_PUSH, "ptem");
282	ioctl (fd_tty, I_PUSH, "ldterm");
283	ioctl (fd_tty, I_PUSH, "ttcompat");
284	}
285	#endif
286	/* ---------------------------------------- */
287	# if defined(TIOCSCTTY)
288	fd = ioctl (fd_tty, TIOCSCTTY, NULL);
289	# elif defined(TIOCSETCTTY)
290	fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
291	# else
292	fd = open (ttydev, O_RDWR);
293	if (fd >= 0)
294	close (fd);
295	# endif
296	/* ---------------------------------------- */
297	fd = open ("/dev/tty", O_WRONLY);
298	if (fd < 0)
299	return -1; /* fatal */
300	close (fd);
301	/* ---------------------------------------- */
302	#endif /* ! __QNX__ */
303
304	return 0;
305	}
306
307	#ifndef NO_SETOWNER_TTYDEV
308	static struct ttyconf {
309	gid_t gid;
310	mode_t mode;
311
312	ttyconf ()
313	{
314	#ifdef TTY_GID_SUPPORT
315	struct group *gr = getgrnam ("tty");
316
317	if (gr)
318	{ /* change group ownership of tty to "tty" */
319	mode = S_IRUSR \| S_IWUSR \| S_IWGRP;
320	gid = gr->gr_gid;
321	}
322	else
323	#endif /* TTY_GID_SUPPORT */
324	{
325	mode = S_IRUSR \| S_IWUSR \| S_IWGRP \| S_IWOTH;
326	gid = getgid ();
327	}
328	}
329	} ttyconf;
330
331	void
332	rxvt_ptytty::privileges (rxvt_privaction action)
333	{
334	rxvt_privileges (RESTORE);
335
336	if (action == SAVE)
337	{
338	//next_tty_action = RESTORE;
339	# ifndef RESET_TTY_TO_COMMON_DEFAULTS
340	/* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
341	if (lstat (name, &savestat) < 0) /* you lose out */
342	;//next_tty_action = IGNORE;
343	else
344	# endif
345
346	{
347	chown (name, getuid (), ttyconf.gid); /* fail silently */
348	chmod (name, ttyconf.mode);
349	# ifdef HAVE_REVOKE
350	revoke (name);
351	# endif
352
353	}
354	}
355	else
356	{ /* action == RESTORE */
357	//next_tty_action = IGNORE;
358	# ifndef RESET_TTY_TO_COMMON_DEFAULTS
359	chmod (name, savestat.st_mode);
360	chown (name, savestat.st_uid, savestat.st_gid);
361	# else
362	chmod (name, (S_IRUSR \| S_IWUSR \| S_IRGRP \| S_IWGRP \| S_IROTH \| S_IWOTH));
363	chown (name, 0, 0);
364	# endif
365
366	}
367
368	rxvt_privileges (IGNORE);
369	}
370	#endif
371
372	rxvt_ptytty::rxvt_ptytty ()
373	{
374	pty = tty = -1;
375	name = 0;
376	}
377
378	rxvt_ptytty::~rxvt_ptytty ()
379	{
380	put ();
381	}
382
383	void
384
385	rxvt_ptytty::close_tty ()
386	{
387	if (tty >= 0) close (tty);
388	tty = -1;
389	}
390
391	void
392	rxvt_ptytty::put ()
393	{
394	#ifndef NO_SETOWNER_TTYDEV
395	if (tty >= 0)
396	privileges (RESTORE);
397	#endif
398
399	if (pty >= 0) close (pty);
400	close_tty ();
401	free (name);
402
403	pty = tty = -1;
404	name = 0;
405	}
406
407	bool
408	rxvt_ptytty::make_controlling_tty ()
409	{
410	return control_tty (tty, name) >= 0;
411	}
412
413	bool
414	rxvt_ptytty::get ()
415	{
416	/* get master (pty) */
417	if ((pty = get_pty (&tty, &name)) < 0)
418	return false;
419
420	fcntl (pty, F_SETFL, O_NONBLOCK);
421
422	/* get slave (tty) */
423	if (tty < 0)
424	{
425	#ifndef NO_SETOWNER_TTYDEV
426	privileges (SAVE);
427	#endif
428
429	if ((tty = get_tty (name)) < 0)
430	{
431	put ();
432	return false;
433	}
434	}
435
436	return true;
437	}
438
439	/----------------------- end-of-file (C source) -----------------------/
440