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
#ifdef HAVE_PTY_H
# include <pty.h>
#endif

// better do this via configure, but....
#if defined(__FreeBSD__)
# include <libutil.h>
#elif defined(__DARWIN__) || (defined (__MACH__) && defined (__APPLE__))
# 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

#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)
{
  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) 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;
}

void
rxvt_ptytty::set_utf8_mode (bool on)
{
#ifdef IUTF8
  if (pty != -1)
    {
      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:	1.27
Committed:	Tue Jan 3 16:32:33 2006 UTC (18 years, 4 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.26:	+5 -1 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	#ifdef HAVE_PTY_H
52	# include <pty.h>
53	#endif
54
55	// better do this via configure, but....
56	#if defined(__FreeBSD__)
57	# include <libutil.h>
58	#elif defined(__DARWIN__) \|\| (defined (__MACH__) && defined (__APPLE__))
59	# include <util.h>
60	#endif
61
62	#include <cstdio>
63	#include <grp.h>
64
65	/* ------------------------------------------------------------------------- *
66	* GET PSEUDO TELETYPE - MASTER AND SLAVE *
67	* ------------------------------------------------------------------------- */
68	/*
69	* Returns pty file descriptor, or -1 on failure
70	* If successful, ttydev is set to the name of the slave device.
71	* fd_tty _may_ also be set to an open fd to the slave device
72	*/
73	static int
74	get_pty (int fd_tty, char *ttydev)
75	{
76	int pfd;
77
78	#ifdef PTYS_ARE_OPENPTY
79	char tty_name[sizeof "/dev/pts/????\0"];
80
81	rxvt_privileges(RESTORE);
82	int res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
83	rxvt_privileges(IGNORE);
84
85	if (res != -1)
86	{
87	*ttydev = strdup (tty_name);
88	return pfd;
89	}
90	#endif
91
92	#ifdef PTYS_ARE__GETPTY
93	*ttydev = _getpty (&pfd, O_RDWR \| O_NONBLOCK \| O_NOCTTY, 0622, 0);
94	if (*ttydev != NULL)
95	return pfd;
96	#endif
97
98	#ifdef PTYS_ARE_GETPTY
99	char *ptydev;
100
101	while ((ptydev = getpty ()) != NULL)
102	if ((pfd = open (ptydev, O_RDWR \| O_NOCTTY, 0)) >= 0)
103	{
104	*ttydev = ptydev;
105	return pfd;
106	}
107	#endif
108
109	#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
110	# if defined(PTYS_ARE_GETPT) \|\| defined(PTYS_ARE_PTMX)
111
112	{
113	# ifdef PTYS_ARE_GETPT
114	pfd = getpt ();
115	# else
116	pfd = open ("/dev/ptmx", O_RDWR \| O_NOCTTY, 0);
117	# endif
118
119	if (pfd >= 0)
120	{
121	if (grantpt (pfd) == 0 /* change slave permissions */
122	&& unlockpt (pfd) == 0)
123	{ /* slave now unlocked */
124	ttydev = strdup (ptsname (pfd)); / get slave's name */
125	return pfd;
126	}
127	close (pfd);
128	}
129	}
130	# endif
131	#endif
132
133	#ifdef PTYS_ARE_PTC
134	if ((pfd = open ("/dev/ptc", O_RDWR \| O_NOCTTY, 0)) >= 0)
135	{
136	*ttydev = strdup (ttyname (pfd));
137	return pfd;
138	}
139	#endif
140
141	#ifdef PTYS_ARE_CLONE
142	if ((pfd = open ("/dev/ptym/clone", O_RDWR \| O_NOCTTY, 0)) >= 0)
143	{
144	*ttydev = strdup (ptsname (pfd));
145	return pfd;
146	}
147	#endif
148
149	#ifdef PTYS_ARE_NUMERIC
150	{
151	int idx;
152	char c1, c2;
153	char pty_name[] = "/dev/ptyp???";
154	char tty_name[] = "/dev/ttyp???";
155
156	c1 = &(pty_name[sizeof (pty_name) - 4]);
157	c2 = &(tty_name[sizeof (tty_name) - 4]);
158	for (idx = 0; idx < 256; idx++)
159	{
160	sprintf (c1, "%d", idx);
161	sprintf (c2, "%d", idx);
162	if (access (tty_name, F_OK) < 0)
163	{
164	idx = 256;
165	break;
166	}
167
168	if ((pfd = open (pty_name, O_RDWR \| O_NOCTTY, 0)) >= 0)
169	{
170	if (access (tty_name, R_OK \| W_OK) == 0)
171	{
172	*ttydev = strdup (tty_name);
173	return pfd;
174	}
175
176	close (pfd);
177	}
178	}
179	}
180	#endif
181
182	#ifdef PTYS_ARE_SEARCHED
183	{
184	const char c1, c2;
185	char pty_name[] = "/dev/pty??";
186	char tty_name[] = "/dev/tty??";
187
188	# ifndef PTYCHAR1
189	# define PTYCHAR1 "pqrstuvwxyz"
190	# endif
191	# ifndef PTYCHAR2
192	# define PTYCHAR2 "0123456789abcdef"
193	# endif
194
195	for (c1 = PTYCHAR1; *c1; c1++)
196	{
197	pty_name[ (sizeof (pty_name) - 3)] =
198	tty_name[ (sizeof (pty_name) - 3)] = *c1;
199	for (c2 = PTYCHAR2; *c2; c2++)
200	{
201	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	{
205	if (access (tty_name, R_OK \| W_OK) == 0)
206	{
207	*ttydev = strdup (tty_name);
208	return pfd;
209	}
210
211	close (pfd);
212	}
213	}
214	}
215	}
216	#endif
217
218	return -1;
219	}
220
221	/----------------------------------------------------------------------/
222	/*
223	* Returns tty file descriptor, or -1 on failure
224	*/
225	static int
226	get_tty (char *ttydev)
227	{
228	return open (ttydev, O_RDWR \| O_NOCTTY, 0);
229	}
230
231	/----------------------------------------------------------------------/
232	/*
233	* Make our tty a controlling tty so that /dev/tty points to us
234	*/
235	static int
236	control_tty (int fd_tty, const char *ttydev)
237	{
238	#ifndef __QNX__
239	int fd;
240
241	/* ---------------------------------------- */
242	# ifdef HAVE_SETSID
243	setsid ();
244	# endif
245	# if defined(HAVE_SETPGID)
246	setpgid (0, 0);
247	# elif defined(HAVE_SETPGRP)
248	setpgrp (0, 0);
249	# endif
250
251	/* ---------------------------------------- */
252	# ifdef TIOCNOTTY
253	fd = open ("/dev/tty", O_RDWR \| O_NOCTTY);
254	if (fd >= 0)
255	{
256	ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
257	close (fd);
258	}
259	# endif
260
261	/* ---------------------------------------- */
262	fd = open ("/dev/tty", O_RDWR \| O_NOCTTY);
263	if (fd >= 0)
264	close (fd); /* ouch: still have controlling tty */
265
266	/* ---------------------------------------- */
267	#if defined(PTYS_ARE_PTMX) && defined(I_PUSH)
268	/*
269	* Push STREAMS modules:
270	* ptem: pseudo-terminal hardware emulation module.
271	* ldterm: standard terminal line discipline.
272	* ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
273	*
274	* After we push the STREAMS modules, the first open () on the slave side
275	* (i.e. the next section between the dashes giving us "tty opened OK")
276	* should make the "ptem" (or "ldterm" depending upon either which OS
277	* version or which set of manual pages you have) module give us a
278	* controlling terminal. We must already have close ()d the master side
279	* fd in this child process before we push STREAMS modules on because the
280	* documentation is really unclear about whether it is any close () on
281	* the master side or the last close () - i.e. a proper STREAMS dismantling
282	* close () - on the master side which causes a hang up to be sent
283	* through - Geoff Wing
284	*/
285	# ifdef HAVE_ISASTREAM
286	if (isastream (fd_tty) == 1)
287	# endif
288	{
289	ioctl (fd_tty, I_PUSH, "ptem");
290	ioctl (fd_tty, I_PUSH, "ldterm");
291	ioctl (fd_tty, I_PUSH, "ttcompat");
292	}
293	#endif
294	/* ---------------------------------------- */
295	# if defined(TIOCSCTTY)
296	fd = ioctl (fd_tty, TIOCSCTTY, NULL);
297	# elif defined(TIOCSETCTTY)
298	fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
299	# else
300	fd = open (ttydev, O_RDWR);
301	if (fd >= 0)
302	close (fd);
303	# endif
304	/* ---------------------------------------- */
305	fd = open ("/dev/tty", O_WRONLY);
306	if (fd < 0)
307	return -1; /* fatal */
308	close (fd);
309	/* ---------------------------------------- */
310	#endif /* ! __QNX__ */
311
312	return 0;
313	}
314
315	#ifndef NO_SETOWNER_TTYDEV
316	static struct ttyconf {
317	gid_t gid;
318	mode_t mode;
319
320	ttyconf ()
321	{
322	#ifdef TTY_GID_SUPPORT
323	struct group *gr = getgrnam ("tty");
324
325	if (gr)
326	{ /* change group ownership of tty to "tty" */
327	mode = S_IRUSR \| S_IWUSR \| S_IWGRP;
328	gid = gr->gr_gid;
329	}
330	else
331	#endif /* TTY_GID_SUPPORT */
332	{
333	mode = S_IRUSR \| S_IWUSR \| S_IWGRP \| S_IWOTH;
334	gid = getgid ();
335	}
336	}
337	} ttyconf;
338
339	void
340	rxvt_ptytty::privileges (rxvt_privaction action)
341	{
342	if (!name \|\| !*name)
343	return;
344
345	rxvt_privileges (RESTORE);
346
347	if (action == SAVE)
348	{
349	# ifndef RESET_TTY_TO_COMMON_DEFAULTS
350	/* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
351	if (lstat (name, &savestat) < 0) /* you lose out */
352	;
353	else
354	# endif
355	{
356	saved = true;
357	chown (name, getuid (), ttyconf.gid); /* fail silently */
358	chmod (name, ttyconf.mode);
359	# ifdef HAVE_REVOKE
360	revoke (name);
361	# endif
362	}
363	}
364	else
365	{ /* action == RESTORE */
366	# ifndef RESET_TTY_TO_COMMON_DEFAULTS
367	if (saved)
368	{
369	chmod (name, savestat.st_mode);
370	chown (name, savestat.st_uid, savestat.st_gid);
371	}
372	# else
373	chmod (name, (S_IRUSR \| S_IWUSR \| S_IRGRP \| S_IWGRP \| S_IROTH \| S_IWOTH));
374	chown (name, 0, 0);
375	# endif
376
377	}
378
379	rxvt_privileges (IGNORE);
380	}
381	#endif
382
383	rxvt_ptytty::rxvt_ptytty ()
384	{
385	pty = tty = -1;
386	name = 0;
387	#ifndef NO_SETOWNER_TTYDEV
388	saved = false;
389	#endif
390	}
391
392	rxvt_ptytty::~rxvt_ptytty ()
393	{
394	put ();
395	}
396
397	void
398
399	rxvt_ptytty::close_tty ()
400	{
401	if (tty >= 0) close (tty);
402	tty = -1;
403	}
404
405	void
406	rxvt_ptytty::put ()
407	{
408	#ifndef NO_SETOWNER_TTYDEV
409	if (tty >= 0)
410	privileges (RESTORE);
411	#endif
412
413	if (pty >= 0) close (pty);
414	close_tty ();
415	free (name);
416
417	pty = tty = -1;
418	name = 0;
419	}
420
421	bool
422	rxvt_ptytty::make_controlling_tty ()
423	{
424	return control_tty (tty, name) >= 0;
425	}
426
427	bool
428	rxvt_ptytty::get ()
429	{
430	/* get master (pty) */
431	if ((pty = get_pty (&tty, &name)) < 0)
432	return false;
433
434	fcntl (pty, F_SETFL, O_NONBLOCK);
435
436	/* get slave (tty) */
437	if (tty < 0)
438	{
439	#ifndef NO_SETOWNER_TTYDEV
440	privileges (SAVE);
441	#endif
442
443	if ((tty = get_tty (name)) < 0)
444	{
445	put ();
446	return false;
447	}
448	}
449
450	return true;
451	}
452
453	void
454	rxvt_ptytty::set_utf8_mode (bool on)
455	{
456	#ifdef IUTF8
457	if (pty != -1)
458	{
459	struct termios tio;
460
461	if (tcgetattr (pty, &tio) != -1)
462	{
463	tcflag_t new_cflag = tio.c_iflag;
464
465	if (on)
466	new_cflag \|= IUTF8;
467	else
468	new_cflag &= ~IUTF8;
469
470	if (new_cflag != tio.c_iflag)
471	{
472	tio.c_iflag = new_cflag;
473	tcsetattr (pty, TCSANOW, &tio);
474	}
475	}
476	}
477	#endif
478	}
479
480	/----------------------- end-of-file (C source) -----------------------/
481