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>

#include "ptytty.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;

  /* ---------------------------------------- */
  setsid ();

  /* ---------------------------------------- */
# 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;
}

// a "factory" *g*
rxvt_ptytty *rxvt_new_ptytty ()
{
   return new rxvt_ptytty_unix;
}

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

Revision:	1.39
Committed:	Tue Jan 17 12:22:59 2006 UTC (18 years, 4 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.38:	+8 -0 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	#include "ptytty.h"
60
61	/////////////////////////////////////////////////////////////////////////////
62
63	/* ------------------------------------------------------------------------- *
64	* GET PSEUDO TELETYPE - MASTER AND SLAVE *
65	* ------------------------------------------------------------------------- */
66	/*
67	* Returns pty file descriptor, or -1 on failure
68	* If successful, ttydev is set to the name of the slave device.
69	* fd_tty _may_ also be set to an open fd to the slave device
70	*/
71	static int
72	get_pty (int fd_tty, char *ttydev)
73	{
74	int pfd;
75
76	#ifdef PTYS_ARE_OPENPTY
77	char tty_name[sizeof "/dev/pts/????\0"];
78
79	rxvt_privileges(RESTORE);
80	int res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
81	rxvt_privileges(IGNORE);
82
83	if (res != -1)
84	{
85	*ttydev = strdup (tty_name);
86	return pfd;
87	}
88	#endif
89
90	#ifdef PTYS_ARE__GETPTY
91	*ttydev = _getpty (&pfd, O_RDWR \| O_NONBLOCK \| O_NOCTTY, 0622, 0);
92	if (*ttydev != NULL)
93	return pfd;
94	#endif
95
96	#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
97	# if defined(PTYS_ARE_GETPT) \|\| defined(PTYS_ARE_POSIX) \|\| defined(PTYS_ARE_PTMX)
98
99	{
100	# ifdef PTYS_ARE_GETPT
101	pfd = getpt();
102	# else
103	# ifdef PTYS_ARE_POSIX
104	pfd = posix_openpt (O_RDWR);
105	# else
106	pfd = open ("/dev/ptmx", O_RDWR \| O_NOCTTY, 0);
107	# endif
108	# endif
109
110	if (pfd >= 0)
111	{
112	if (grantpt (pfd) == 0 /* change slave permissions */
113	&& unlockpt (pfd) == 0)
114	{ /* slave now unlocked */
115	ttydev = strdup (ptsname (pfd)); / get slave's name */
116	return pfd;
117	}
118	close (pfd);
119	}
120	}
121	# endif
122	#endif
123
124	#ifdef PTYS_ARE_PTC
125	if ((pfd = open ("/dev/ptc", O_RDWR \| O_NOCTTY, 0)) >= 0)
126	{
127	*ttydev = strdup (ttyname (pfd));
128	return pfd;
129	}
130	#endif
131
132	#ifdef PTYS_ARE_CLONE
133	if ((pfd = open ("/dev/ptym/clone", O_RDWR \| O_NOCTTY, 0)) >= 0)
134	{
135	*ttydev = strdup (ptsname (pfd));
136	return pfd;
137	}
138	#endif
139
140	#ifdef PTYS_ARE_NUMERIC
141	{
142	int idx;
143	char c1, c2;
144	char pty_name[] = "/dev/ptyp???";
145	char tty_name[] = "/dev/ttyp???";
146
147	c1 = &(pty_name[sizeof (pty_name) - 4]);
148	c2 = &(tty_name[sizeof (tty_name) - 4]);
149	for (idx = 0; idx < 256; idx++)
150	{
151	sprintf (c1, "%d", idx);
152	sprintf (c2, "%d", idx);
153	if (access (tty_name, F_OK) < 0)
154	{
155	idx = 256;
156	break;
157	}
158
159	if ((pfd = open (pty_name, O_RDWR \| O_NOCTTY, 0)) >= 0)
160	{
161	if (access (tty_name, R_OK \| W_OK) == 0)
162	{
163	*ttydev = strdup (tty_name);
164	return pfd;
165	}
166
167	close (pfd);
168	}
169	}
170	}
171	#endif
172
173	#ifdef PTYS_ARE_SEARCHED
174	{
175	const char c1, c2;
176	char pty_name[] = "/dev/pty??";
177	char tty_name[] = "/dev/tty??";
178
179	# ifndef PTYCHAR1
180	# define PTYCHAR1 "pqrstuvwxyz"
181	# endif
182	# ifndef PTYCHAR2
183	# define PTYCHAR2 "0123456789abcdef"
184	# endif
185
186	for (c1 = PTYCHAR1; *c1; c1++)
187	{
188	pty_name[ (sizeof (pty_name) - 3)] =
189	tty_name[ (sizeof (pty_name) - 3)] = *c1;
190	for (c2 = PTYCHAR2; *c2; c2++)
191	{
192	pty_name[ (sizeof (pty_name) - 2)] =
193	tty_name[ (sizeof (pty_name) - 2)] = *c2;
194	if ((pfd = open (pty_name, O_RDWR \| O_NOCTTY, 0)) >= 0)
195	{
196	if (access (tty_name, R_OK \| W_OK) == 0)
197	{
198	*ttydev = strdup (tty_name);
199	return pfd;
200	}
201
202	close (pfd);
203	}
204	}
205	}
206	}
207	#endif
208
209	return -1;
210	}
211
212	/----------------------------------------------------------------------/
213	/*
214	* Returns tty file descriptor, or -1 on failure
215	*/
216	static int
217	get_tty (char *ttydev)
218	{
219	return open (ttydev, O_RDWR \| O_NOCTTY, 0);
220	}
221
222	/----------------------------------------------------------------------/
223	/*
224	* Make our tty a controlling tty so that /dev/tty points to us
225	*/
226	static int
227	control_tty (int fd_tty)
228	{
229	int fd;
230
231	/* ---------------------------------------- */
232	setsid ();
233
234	/* ---------------------------------------- */
235	# if defined(PTYS_ARE_PTMX) && defined(I_PUSH)
236	/*
237	* Push STREAMS modules:
238	* ptem: pseudo-terminal hardware emulation module.
239	* ldterm: standard terminal line discipline.
240	* ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
241	*
242	* After we push the STREAMS modules, the first open () on the slave side
243	* (i.e. the next section between the dashes giving us "tty opened OK")
244	* should make the "ptem" (or "ldterm" depending upon either which OS
245	* version or which set of manual pages you have) module give us a
246	* controlling terminal. We must already have close ()d the master side
247	* fd in this child process before we push STREAMS modules on because the
248	* documentation is really unclear about whether it is any close () on
249	* the master side or the last close () - i.e. a proper STREAMS dismantling
250	* close () - on the master side which causes a hang up to be sent
251	* through - Geoff Wing
252	*/
253	# ifdef HAVE_ISASTREAM
254	if (isastream (fd_tty) == 1)
255	# endif
256	{
257	ioctl (fd_tty, I_PUSH, "ptem");
258	ioctl (fd_tty, I_PUSH, "ldterm");
259	ioctl (fd_tty, I_PUSH, "ttcompat");
260	}
261	# endif
262	/* ---------------------------------------- */
263	fd = ioctl (fd_tty, TIOCSCTTY, NULL);
264	/* ---------------------------------------- */
265	fd = open ("/dev/tty", O_WRONLY);
266	if (fd < 0)
267	return -1; /* fatal */
268	close (fd);
269	/* ---------------------------------------- */
270
271	return 0;
272	}
273
274	void
275	rxvt_ptytty::close_tty ()
276	{
277	if (tty < 0)
278	return;
279
280	close (tty);
281	tty = -1;
282	}
283
284	bool
285	rxvt_ptytty::make_controlling_tty ()
286	{
287	return control_tty (tty) >= 0;
288	}
289
290	void
291	rxvt_ptytty::set_utf8_mode (bool on)
292	{
293	#ifdef IUTF8
294	if (pty < 0)
295	return;
296
297	struct termios tio;
298
299	if (tcgetattr (pty, &tio) != -1)
300	{
301	tcflag_t new_cflag = tio.c_iflag;
302
303	if (on)
304	new_cflag \|= IUTF8;
305	else
306	new_cflag &= ~IUTF8;
307
308	if (new_cflag != tio.c_iflag)
309	{
310	tio.c_iflag = new_cflag;
311	tcsetattr (pty, TCSANOW, &tio);
312	}
313	}
314	#endif
315	}
316
317	/////////////////////////////////////////////////////////////////////////////
318
319	#ifndef NO_SETOWNER_TTYDEV
320	static struct ttyconf {
321	gid_t gid;
322	mode_t mode;
323
324	ttyconf ()
325	{
326	#ifdef TTY_GID_SUPPORT
327	struct group *gr = getgrnam ("tty");
328
329	if (gr)
330	{ /* change group ownership of tty to "tty" */
331	mode = S_IRUSR \| S_IWUSR \| S_IWGRP;
332	gid = gr->gr_gid;
333	}
334	else
335	#endif /* TTY_GID_SUPPORT */
336	{
337	mode = S_IRUSR \| S_IWUSR \| S_IWGRP \| S_IWOTH;
338	gid = getgid ();
339	}
340	}
341	} ttyconf;
342
343	/////////////////////////////////////////////////////////////////////////////
344
345	void
346	rxvt_ptytty_unix::privileges (rxvt_privaction action)
347	{
348	if (!name \|\| !*name)
349	return;
350
351	rxvt_privileges (RESTORE);
352
353	if (action == SAVE)
354	{
355	# ifndef RESET_TTY_TO_COMMON_DEFAULTS
356	/* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
357	if (lstat (name, &savestat) < 0) /* you lose out */
358	;
359	else
360	# endif
361	{
362	saved = true;
363	chown (name, getuid (), ttyconf.gid); /* fail silently */
364	chmod (name, ttyconf.mode);
365	# ifdef HAVE_REVOKE
366	revoke (name);
367	# endif
368	}
369	}
370	else
371	{ /* action == RESTORE */
372	# ifndef RESET_TTY_TO_COMMON_DEFAULTS
373	if (saved)
374	{
375	chmod (name, savestat.st_mode);
376	chown (name, savestat.st_uid, savestat.st_gid);
377	}
378	# else
379	chmod (name, (S_IRUSR \| S_IWUSR \| S_IRGRP \| S_IWGRP \| S_IROTH \| S_IWOTH));
380	chown (name, 0, 0);
381	# endif
382
383	}
384
385	rxvt_privileges (IGNORE);
386	}
387	#endif
388
389	rxvt_ptytty_unix::rxvt_ptytty_unix ()
390	{
391	pty = tty = -1;
392	name = 0;
393	#ifndef NO_SETOWNER_TTYDEV
394	saved = false;
395	#endif
396	#if UTMP_SUPPORT
397	cmd_pid = 0;
398	#endif
399	}
400
401	rxvt_ptytty_unix::~rxvt_ptytty_unix ()
402	{
403	logout ();
404	put ();
405	}
406
407	void
408	rxvt_ptytty_unix::put ()
409	{
410	#ifndef NO_SETOWNER_TTYDEV
411	privileges (RESTORE);
412	#endif
413
414	if (pty >= 0) close (pty);
415	close_tty ();
416	free (name);
417
418	pty = tty = -1;
419	name = 0;
420	}
421
422	bool
423	rxvt_ptytty_unix::get ()
424	{
425	/* get master (pty) */
426	if ((pty = get_pty (&tty, &name)) < 0)
427	return false;
428
429	fcntl (pty, F_SETFL, O_NONBLOCK);
430
431	/* get slave (tty) */
432	if (tty < 0)
433	{
434	#ifndef NO_SETOWNER_TTYDEV
435	privileges (SAVE);
436	#endif
437
438	if ((tty = get_tty (name)) < 0)
439	{
440	put ();
441	return false;
442	}
443	}
444
445	return true;
446	}
447
448	// a "factory" g
449	rxvt_ptytty *rxvt_new_ptytty ()
450	{
451	return new rxvt_ptytty_unix;
452	}
453
454	/----------------------- end-of-file (C source) -----------------------/
455