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"];

  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;
}

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:	1.22
Committed:	Tue Jan 11 04:44:57 2005 UTC (19 years, 4 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rel-5_1, rel-5_0, rel-4_8, rel-4_9
Changes since 1.18:	+30 -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 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	if (openpty (&pfd, fd_tty, tty_name, NULL, NULL) != -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	#ifdef PTYS_ARE_GETPTY
95
96	char *ptydev;
97
98	while ((ptydev = getpty ()) != NULL)
99	if ((pfd = open (ptydev, O_RDWR \| O_NOCTTY, 0)) >= 0)
100	{
101	*ttydev = ptydev;
102	return pfd;
103	}
104	#endif
105
106	#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
107	# if defined(PTYS_ARE_GETPT) \|\| defined(PTYS_ARE_PTMX)
108
109	{
110	# ifdef PTYS_ARE_GETPT
111	pfd = getpt ();
112	# else
113	pfd = open ("/dev/ptmx", O_RDWR \| O_NOCTTY, 0);
114	# endif
115
116	if (pfd >= 0)
117	{
118	if (grantpt (pfd) == 0 /* change slave permissions */
119	&& unlockpt (pfd) == 0)
120	{ /* slave now unlocked */
121	ttydev = strdup (ptsname (pfd)); / get slave's name */
122	return pfd;
123	}
124	close (pfd);
125	}
126	}
127	# endif
128	#endif
129
130	#ifdef PTYS_ARE_PTC
131	if ((pfd = open ("/dev/ptc", O_RDWR \| O_NOCTTY, 0)) >= 0)
132	{
133	*ttydev = strdup (ttyname (pfd));
134	return pfd;
135	}
136	#endif
137
138	#ifdef PTYS_ARE_CLONE
139	if ((pfd = open ("/dev/ptym/clone", O_RDWR \| O_NOCTTY, 0)) >= 0)
140	{
141	*ttydev = strdup (ptsname (pfd));
142	return pfd;
143	}
144	#endif
145
146	#ifdef PTYS_ARE_NUMERIC
147	{
148	int idx;
149	char c1, c2;
150	char pty_name[] = "/dev/ptyp???";
151	char tty_name[] = "/dev/ttyp???";
152
153	c1 = &(pty_name[sizeof (pty_name) - 4]);
154	c2 = &(tty_name[sizeof (tty_name) - 4]);
155	for (idx = 0; idx < 256; idx++)
156	{
157	sprintf (c1, "%d", idx);
158	sprintf (c2, "%d", idx);
159	if (access (tty_name, F_OK) < 0)
160	{
161	idx = 256;
162	break;
163	}
164
165	if ((pfd = open (pty_name, O_RDWR \| O_NOCTTY, 0)) >= 0)
166	{
167	if (access (tty_name, R_OK \| W_OK) == 0)
168	{
169	*ttydev = strdup (tty_name);
170	return pfd;
171	}
172
173	close (pfd);
174	}
175	}
176	}
177	#endif
178
179	#ifdef PTYS_ARE_SEARCHED
180	{
181	const char c1, c2;
182	char pty_name[] = "/dev/pty??";
183	char tty_name[] = "/dev/tty??";
184
185	# ifndef PTYCHAR1
186	# define PTYCHAR1 "pqrstuvwxyz"
187	# endif
188	# ifndef PTYCHAR2
189	# define PTYCHAR2 "0123456789abcdef"
190	# endif
191
192	for (c1 = PTYCHAR1; *c1; c1++)
193	{
194	pty_name[ (sizeof (pty_name) - 3)] =
195	tty_name[ (sizeof (pty_name) - 3)] = *c1;
196	for (c2 = PTYCHAR2; *c2; c2++)
197	{
198	pty_name[ (sizeof (pty_name) - 2)] =
199	tty_name[ (sizeof (pty_name) - 2)] = *c2;
200	if ((pfd = open (pty_name, O_RDWR \| O_NOCTTY, 0)) >= 0)
201	{
202	if (access (tty_name, R_OK \| W_OK) == 0)
203	{
204	*ttydev = strdup (tty_name);
205	return pfd;
206	}
207
208	close (pfd);
209	}
210	}
211	}
212	}
213	#endif
214
215	return -1;
216	}
217
218	/----------------------------------------------------------------------/
219	/*
220	* Returns tty file descriptor, or -1 on failure
221	*/
222	static int
223	get_tty (char *ttydev)
224	{
225	return open (ttydev, O_RDWR \| O_NOCTTY, 0);
226	}
227
228	/----------------------------------------------------------------------/
229	/*
230	* Make our tty a controlling tty so that /dev/tty points to us
231	*/
232	static int
233	control_tty (int fd_tty, const char *ttydev)
234	{
235	#ifndef __QNX__
236	int fd;
237
238	/* ---------------------------------------- */
239	# ifdef HAVE_SETSID
240	setsid ();
241	# endif
242	# if defined(HAVE_SETPGID)
243	setpgid (0, 0);
244	# elif defined(HAVE_SETPGRP)
245	setpgrp (0, 0);
246	# endif
247
248	/* ---------------------------------------- */
249	# ifdef TIOCNOTTY
250	fd = open ("/dev/tty", O_RDWR \| O_NOCTTY);
251	if (fd >= 0)
252	{
253	ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
254	close (fd);
255	}
256	# endif
257
258	/* ---------------------------------------- */
259	fd = open ("/dev/tty", O_RDWR \| O_NOCTTY);
260	if (fd >= 0)
261	close (fd); /* ouch: still have controlling tty */
262
263	/* ---------------------------------------- */
264	#if defined(PTYS_ARE_PTMX) && defined(I_PUSH)
265	/*
266	* Push STREAMS modules:
267	* ptem: pseudo-terminal hardware emulation module.
268	* ldterm: standard terminal line discipline.
269	* ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
270	*
271	* After we push the STREAMS modules, the first open () on the slave side
272	* (i.e. the next section between the dashes giving us "tty opened OK")
273	* should make the "ptem" (or "ldterm" depending upon either which OS
274	* version or which set of manual pages you have) module give us a
275	* controlling terminal. We must already have close ()d the master side
276	* fd in this child process before we push STREAMS modules on because the
277	* documentation is really unclear about whether it is any close () on
278	* the master side or the last close () - i.e. a proper STREAMS dismantling
279	* close () - on the master side which causes a hang up to be sent
280	* through - Geoff Wing
281	*/
282	# ifdef HAVE_ISASTREAM
283	if (isastream (fd_tty) == 1)
284	# endif
285	{
286	ioctl (fd_tty, I_PUSH, "ptem");
287	ioctl (fd_tty, I_PUSH, "ldterm");
288	ioctl (fd_tty, I_PUSH, "ttcompat");
289	}
290	#endif
291	/* ---------------------------------------- */
292	# if defined(TIOCSCTTY)
293	fd = ioctl (fd_tty, TIOCSCTTY, NULL);
294	# elif defined(TIOCSETCTTY)
295	fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
296	# else
297	fd = open (ttydev, O_RDWR);
298	if (fd >= 0)
299	close (fd);
300	# endif
301	/* ---------------------------------------- */
302	fd = open ("/dev/tty", O_WRONLY);
303	if (fd < 0)
304	return -1; /* fatal */
305	close (fd);
306	/* ---------------------------------------- */
307	#endif /* ! __QNX__ */
308
309	return 0;
310	}
311
312	#ifndef NO_SETOWNER_TTYDEV
313	static struct ttyconf {
314	gid_t gid;
315	mode_t mode;
316
317	ttyconf ()
318	{
319	#ifdef TTY_GID_SUPPORT
320	struct group *gr = getgrnam ("tty");
321
322	if (gr)
323	{ /* change group ownership of tty to "tty" */
324	mode = S_IRUSR \| S_IWUSR \| S_IWGRP;
325	gid = gr->gr_gid;
326	}
327	else
328	#endif /* TTY_GID_SUPPORT */
329	{
330	mode = S_IRUSR \| S_IWUSR \| S_IWGRP \| S_IWOTH;
331	gid = getgid ();
332	}
333	}
334	} ttyconf;
335
336	void
337	rxvt_ptytty::privileges (rxvt_privaction action)
338	{
339	rxvt_privileges (RESTORE);
340
341	if (action == SAVE)
342	{
343	//next_tty_action = RESTORE;
344	# ifndef RESET_TTY_TO_COMMON_DEFAULTS
345	/* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
346	if (lstat (name, &savestat) < 0) /* you lose out */
347	;//next_tty_action = IGNORE;
348	else
349	# endif
350
351	{
352	chown (name, getuid (), ttyconf.gid); /* fail silently */
353	chmod (name, ttyconf.mode);
354	# ifdef HAVE_REVOKE
355	revoke (name);
356	# endif
357
358	}
359	}
360	else
361	{ /* action == RESTORE */
362	//next_tty_action = IGNORE;
363	# ifndef RESET_TTY_TO_COMMON_DEFAULTS
364	chmod (name, savestat.st_mode);
365	chown (name, savestat.st_uid, savestat.st_gid);
366	# else
367	chmod (name, (S_IRUSR \| S_IWUSR \| S_IRGRP \| S_IWGRP \| S_IROTH \| S_IWOTH));
368	chown (name, 0, 0);
369	# endif
370
371	}
372
373	rxvt_privileges (IGNORE);
374	}
375	#endif
376
377	rxvt_ptytty::rxvt_ptytty ()
378	{
379	pty = tty = -1;
380	name = 0;
381	}
382
383	rxvt_ptytty::~rxvt_ptytty ()
384	{
385	put ();
386	}
387
388	void
389
390	rxvt_ptytty::close_tty ()
391	{
392	if (tty >= 0) close (tty);
393	tty = -1;
394	}
395
396	void
397	rxvt_ptytty::put ()
398	{
399	#ifndef NO_SETOWNER_TTYDEV
400	if (tty >= 0)
401	privileges (RESTORE);
402	#endif
403
404	if (pty >= 0) close (pty);
405	close_tty ();
406	free (name);
407
408	pty = tty = -1;
409	name = 0;
410	}
411
412	bool
413	rxvt_ptytty::make_controlling_tty ()
414	{
415	return control_tty (tty, name) >= 0;
416	}
417
418	bool
419	rxvt_ptytty::get ()
420	{
421	/* get master (pty) */
422	if ((pty = get_pty (&tty, &name)) < 0)
423	return false;
424
425	fcntl (pty, F_SETFL, O_NONBLOCK);
426
427	/* get slave (tty) */
428	if (tty < 0)
429	{
430	#ifndef NO_SETOWNER_TTYDEV
431	privileges (SAVE);
432	#endif
433
434	if ((tty = get_tty (name)) < 0)
435	{
436	put ();
437	return false;
438	}
439	}
440
441	return true;
442	}
443
444	void
445	rxvt_ptytty::set_utf8_mode (bool on)
446	{
447	#ifdef IUTF8
448	if (pty != -1)
449	{
450	struct termios tio;
451
452	if (tcgetattr (pty, &tio) != -1)
453	{
454	tcflag_t new_cflag = tio.c_iflag;
455
456	if (on)
457	new_cflag \|= IUTF8;
458	else
459	new_cflag &= ~IUTF8;
460
461	if (new_cflag != tio.c_iflag)
462	{
463	tio.c_iflag = new_cflag;
464	tcsetattr (pty, TCSANOW, &tio);
465	}
466	}
467	}
468	#endif
469	}
470
471	/----------------------- end-of-file (C source) -----------------------/
472