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_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)
{
  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::rxvt_ptytty ()
{
  pty = tty = -1;
  name = 0;
#ifndef NO_SETOWNER_TTYDEV
  saved = false;
#endif
}

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

void

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

  close (tty);
  tty = -1;
}

void
rxvt_ptytty::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::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;
}

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
}

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

Revision:	1.32
Committed:	Wed Jan 11 20:46:46 2006 UTC (18 years, 4 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.31:	+0 -11 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	* GET PSEUDO TELETYPE - MASTER AND SLAVE *
61	* ------------------------------------------------------------------------- */
62	/*
63	* Returns pty file descriptor, or -1 on failure
64	* If successful, ttydev is set to the name of the slave device.
65	* fd_tty _may_ also be set to an open fd to the slave device
66	*/
67	static int
68	get_pty (int fd_tty, char *ttydev)
69	{
70	int pfd;
71
72	#ifdef PTYS_ARE_OPENPTY
73	char tty_name[sizeof "/dev/pts/????\0"];
74
75	rxvt_privileges(RESTORE);
76	int res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
77	rxvt_privileges(IGNORE);
78
79	if (res != -1)
80	{
81	*ttydev = strdup (tty_name);
82	return pfd;
83	}
84	#endif
85
86	#ifdef PTYS_ARE__GETPTY
87	*ttydev = _getpty (&pfd, O_RDWR \| O_NONBLOCK \| O_NOCTTY, 0622, 0);
88	if (*ttydev != NULL)
89	return pfd;
90	#endif
91
92	#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
93	# if defined(PTYS_ARE_GETPT) \|\| defined(PTYS_ARE_PTMX)
94
95	{
96	# ifdef PTYS_ARE_GETPT
97	pfd = getpt ();
98	# else
99	pfd = open ("/dev/ptmx", O_RDWR \| O_NOCTTY, 0);
100	# endif
101
102	if (pfd >= 0)
103	{
104	if (grantpt (pfd) == 0 /* change slave permissions */
105	&& unlockpt (pfd) == 0)
106	{ /* slave now unlocked */
107	ttydev = strdup (ptsname (pfd)); / get slave's name */
108	return pfd;
109	}
110	close (pfd);
111	}
112	}
113	# endif
114	#endif
115
116	#ifdef PTYS_ARE_PTC
117	if ((pfd = open ("/dev/ptc", O_RDWR \| O_NOCTTY, 0)) >= 0)
118	{
119	*ttydev = strdup (ttyname (pfd));
120	return pfd;
121	}
122	#endif
123
124	#ifdef PTYS_ARE_CLONE
125	if ((pfd = open ("/dev/ptym/clone", O_RDWR \| O_NOCTTY, 0)) >= 0)
126	{
127	*ttydev = strdup (ptsname (pfd));
128	return pfd;
129	}
130	#endif
131
132	#ifdef PTYS_ARE_NUMERIC
133	{
134	int idx;
135	char c1, c2;
136	char pty_name[] = "/dev/ptyp???";
137	char tty_name[] = "/dev/ttyp???";
138
139	c1 = &(pty_name[sizeof (pty_name) - 4]);
140	c2 = &(tty_name[sizeof (tty_name) - 4]);
141	for (idx = 0; idx < 256; idx++)
142	{
143	sprintf (c1, "%d", idx);
144	sprintf (c2, "%d", idx);
145	if (access (tty_name, F_OK) < 0)
146	{
147	idx = 256;
148	break;
149	}
150
151	if ((pfd = open (pty_name, O_RDWR \| O_NOCTTY, 0)) >= 0)
152	{
153	if (access (tty_name, R_OK \| W_OK) == 0)
154	{
155	*ttydev = strdup (tty_name);
156	return pfd;
157	}
158
159	close (pfd);
160	}
161	}
162	}
163	#endif
164
165	#ifdef PTYS_ARE_SEARCHED
166	{
167	const char c1, c2;
168	char pty_name[] = "/dev/pty??";
169	char tty_name[] = "/dev/tty??";
170
171	# ifndef PTYCHAR1
172	# define PTYCHAR1 "pqrstuvwxyz"
173	# endif
174	# ifndef PTYCHAR2
175	# define PTYCHAR2 "0123456789abcdef"
176	# endif
177
178	for (c1 = PTYCHAR1; *c1; c1++)
179	{
180	pty_name[ (sizeof (pty_name) - 3)] =
181	tty_name[ (sizeof (pty_name) - 3)] = *c1;
182	for (c2 = PTYCHAR2; *c2; c2++)
183	{
184	pty_name[ (sizeof (pty_name) - 2)] =
185	tty_name[ (sizeof (pty_name) - 2)] = *c2;
186	if ((pfd = open (pty_name, O_RDWR \| O_NOCTTY, 0)) >= 0)
187	{
188	if (access (tty_name, R_OK \| W_OK) == 0)
189	{
190	*ttydev = strdup (tty_name);
191	return pfd;
192	}
193
194	close (pfd);
195	}
196	}
197	}
198	}
199	#endif
200
201	return -1;
202	}
203
204	/----------------------------------------------------------------------/
205	/*
206	* Returns tty file descriptor, or -1 on failure
207	*/
208	static int
209	get_tty (char *ttydev)
210	{
211	return open (ttydev, O_RDWR \| O_NOCTTY, 0);
212	}
213
214	/----------------------------------------------------------------------/
215	/*
216	* Make our tty a controlling tty so that /dev/tty points to us
217	*/
218	static int
219	control_tty (int fd_tty, const char *ttydev)
220	{
221	#ifndef __QNX__
222	int fd;
223
224	/* ---------------------------------------- */
225	# ifdef HAVE_SETSID
226	setsid ();
227	# endif
228	# if defined(HAVE_SETPGID)
229	setpgid (0, 0);
230	# elif defined(HAVE_SETPGRP)
231	setpgrp (0, 0);
232	# endif
233
234	/* ---------------------------------------- */
235	# ifdef TIOCNOTTY
236	fd = open ("/dev/tty", O_RDWR \| O_NOCTTY);
237	if (fd >= 0)
238	{
239	ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
240	close (fd);
241	}
242	# endif
243
244	/* ---------------------------------------- */
245	fd = open ("/dev/tty", O_RDWR \| O_NOCTTY);
246	if (fd >= 0)
247	close (fd); /* ouch: still have controlling tty */
248
249	/* ---------------------------------------- */
250	#if defined(PTYS_ARE_PTMX) && defined(I_PUSH)
251	/*
252	* Push STREAMS modules:
253	* ptem: pseudo-terminal hardware emulation module.
254	* ldterm: standard terminal line discipline.
255	* ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
256	*
257	* After we push the STREAMS modules, the first open () on the slave side
258	* (i.e. the next section between the dashes giving us "tty opened OK")
259	* should make the "ptem" (or "ldterm" depending upon either which OS
260	* version or which set of manual pages you have) module give us a
261	* controlling terminal. We must already have close ()d the master side
262	* fd in this child process before we push STREAMS modules on because the
263	* documentation is really unclear about whether it is any close () on
264	* the master side or the last close () - i.e. a proper STREAMS dismantling
265	* close () - on the master side which causes a hang up to be sent
266	* through - Geoff Wing
267	*/
268	# ifdef HAVE_ISASTREAM
269	if (isastream (fd_tty) == 1)
270	# endif
271	{
272	ioctl (fd_tty, I_PUSH, "ptem");
273	ioctl (fd_tty, I_PUSH, "ldterm");
274	ioctl (fd_tty, I_PUSH, "ttcompat");
275	}
276	#endif
277	/* ---------------------------------------- */
278	# if defined(TIOCSCTTY)
279	fd = ioctl (fd_tty, TIOCSCTTY, NULL);
280	# elif defined(TIOCSETCTTY)
281	fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
282	# else
283	fd = open (ttydev, O_RDWR);
284	if (fd >= 0)
285	close (fd);
286	# endif
287	/* ---------------------------------------- */
288	fd = open ("/dev/tty", O_WRONLY);
289	if (fd < 0)
290	return -1; /* fatal */
291	close (fd);
292	/* ---------------------------------------- */
293	#endif /* ! __QNX__ */
294
295	return 0;
296	}
297
298	#ifndef NO_SETOWNER_TTYDEV
299	static struct ttyconf {
300	gid_t gid;
301	mode_t mode;
302
303	ttyconf ()
304	{
305	#ifdef TTY_GID_SUPPORT
306	struct group *gr = getgrnam ("tty");
307
308	if (gr)
309	{ /* change group ownership of tty to "tty" */
310	mode = S_IRUSR \| S_IWUSR \| S_IWGRP;
311	gid = gr->gr_gid;
312	}
313	else
314	#endif /* TTY_GID_SUPPORT */
315	{
316	mode = S_IRUSR \| S_IWUSR \| S_IWGRP \| S_IWOTH;
317	gid = getgid ();
318	}
319	}
320	} ttyconf;
321
322	void
323	rxvt_ptytty::privileges (rxvt_privaction action)
324	{
325	if (!name \|\| !*name)
326	return;
327
328	rxvt_privileges (RESTORE);
329
330	if (action == SAVE)
331	{
332	# ifndef RESET_TTY_TO_COMMON_DEFAULTS
333	/* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
334	if (lstat (name, &savestat) < 0) /* you lose out */
335	;
336	else
337	# endif
338	{
339	saved = true;
340	chown (name, getuid (), ttyconf.gid); /* fail silently */
341	chmod (name, ttyconf.mode);
342	# ifdef HAVE_REVOKE
343	revoke (name);
344	# endif
345	}
346	}
347	else
348	{ /* action == RESTORE */
349	# ifndef RESET_TTY_TO_COMMON_DEFAULTS
350	if (saved)
351	{
352	chmod (name, savestat.st_mode);
353	chown (name, savestat.st_uid, savestat.st_gid);
354	}
355	# else
356	chmod (name, (S_IRUSR \| S_IWUSR \| S_IRGRP \| S_IWGRP \| S_IROTH \| S_IWOTH));
357	chown (name, 0, 0);
358	# endif
359
360	}
361
362	rxvt_privileges (IGNORE);
363	}
364	#endif
365
366	rxvt_ptytty::rxvt_ptytty ()
367	{
368	pty = tty = -1;
369	name = 0;
370	#ifndef NO_SETOWNER_TTYDEV
371	saved = false;
372	#endif
373	}
374
375	rxvt_ptytty::~rxvt_ptytty ()
376	{
377	put ();
378	}
379
380	void
381
382	rxvt_ptytty::close_tty ()
383	{
384	if (tty < 0)
385	return;
386
387	close (tty);
388	tty = -1;
389	}
390
391	void
392	rxvt_ptytty::put ()
393	{
394	#ifndef NO_SETOWNER_TTYDEV
395	privileges (RESTORE);
396	#endif
397
398	if (pty >= 0) close (pty);
399	close_tty ();
400	free (name);
401
402	pty = tty = -1;
403	name = 0;
404	}
405
406	bool
407	rxvt_ptytty::make_controlling_tty ()
408	{
409	return control_tty (tty, name) >= 0;
410	}
411
412	bool
413	rxvt_ptytty::get ()
414	{
415	/* get master (pty) */
416	if ((pty = get_pty (&tty, &name)) < 0)
417	return false;
418
419	fcntl (pty, F_SETFL, O_NONBLOCK);
420
421	/* get slave (tty) */
422	if (tty < 0)
423	{
424	#ifndef NO_SETOWNER_TTYDEV
425	privileges (SAVE);
426	#endif
427
428	if ((tty = get_tty (name)) < 0)
429	{
430	put ();
431	return false;
432	}
433	}
434
435	return true;
436	}
437
438	void
439	rxvt_ptytty::set_utf8_mode (bool on)
440	{
441	#ifdef IUTF8
442	if (pty < 0)
443	return;
444
445	struct termios tio;
446
447	if (tcgetattr (pty, &tio) != -1)
448	{
449	tcflag_t new_cflag = tio.c_iflag;
450
451	if (on)
452	new_cflag \|= IUTF8;
453	else
454	new_cflag &= ~IUTF8;
455
456	if (new_cflag != tio.c_iflag)
457	{
458	tio.c_iflag = new_cflag;
459	tcsetattr (pty, TCSANOW, &tio);
460	}
461	}
462	#endif
463	}
464
465	/----------------------- end-of-file (C source) -----------------------/
466