1 /*--------------------------------*-C-*---------------------------------*
3 *----------------------------------------------------------------------*
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>
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.
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.
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 *---------------------------------------------------------------------*/
24 #include "../config.h" /* NECESSARY */
30 #ifdef HAVE_SYS_TYPES_H
31 # include <sys/types.h>
36 #if defined(HAVE_STRING_H)
42 #ifdef HAVE_SYS_IOCTL_H
43 # include <sys/ioctl.h>
45 #if defined(PTYS_ARE_PTMX) && defined(HAVE_SYS_STROPTS_H)
46 # include <sys/stropts.h> /* for I_PUSH */
52 // better do this via configure, but....
53 #if defined(__FreeBSD__)
55 #elif defined(__DARWIN__) || (defined (__MACH__) && defined (__APPLE__))
62 /* ------------------------------------------------------------------------- *
63 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
64 * ------------------------------------------------------------------------- */
66 * Returns pty file descriptor, or -1 on failure
67 * If successful, ttydev is set to the name of the slave device.
68 * fd_tty _may_ also be set to an open fd to the slave device
71 get_pty (int *fd_tty, char **ttydev)
75 #ifdef PTYS_ARE_OPENPTY
76 char tty_name[sizeof "/dev/pts/????\0"];
78 if (openpty (&pfd, fd_tty, tty_name, NULL, NULL) != -1)
80 *ttydev = strdup (tty_name);
85 #ifdef PTYS_ARE__GETPTY
86 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
91 #ifdef PTYS_ARE_GETPTY
95 while ((ptydev = getpty ()) != NULL)
96 if ((pfd = open (ptydev, O_RDWR | O_NOCTTY, 0)) >= 0)
103 #if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
104 # if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_PTMX)
107 # ifdef PTYS_ARE_GETPT
110 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
115 if (grantpt (pfd) == 0 /* change slave permissions */
116 && unlockpt (pfd) == 0)
117 { /* slave now unlocked */
118 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
128 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
130 *ttydev = strdup (ttyname (pfd));
135 #ifdef PTYS_ARE_CLONE
136 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
138 *ttydev = strdup (ptsname (pfd));
143 #ifdef PTYS_ARE_NUMERIC
147 char pty_name[] = "/dev/ptyp???";
148 char tty_name[] = "/dev/ttyp???";
150 c1 = &(pty_name[sizeof (pty_name) - 4]);
151 c2 = &(tty_name[sizeof (tty_name) - 4]);
152 for (idx = 0; idx < 256; idx++)
154 sprintf (c1, "%d", idx);
155 sprintf (c2, "%d", idx);
156 if (access (tty_name, F_OK) < 0)
162 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
164 if (access (tty_name, R_OK | W_OK) == 0)
166 *ttydev = strdup (tty_name);
176 #ifdef PTYS_ARE_SEARCHED
179 char pty_name[] = "/dev/pty??";
180 char tty_name[] = "/dev/tty??";
183 # define PTYCHAR1 "pqrstuvwxyz"
186 # define PTYCHAR2 "0123456789abcdef"
189 for (c1 = PTYCHAR1; *c1; c1++)
191 pty_name[ (sizeof (pty_name) - 3)] =
192 tty_name[ (sizeof (pty_name) - 3)] = *c1;
193 for (c2 = PTYCHAR2; *c2; c2++)
195 pty_name[ (sizeof (pty_name) - 2)] =
196 tty_name[ (sizeof (pty_name) - 2)] = *c2;
197 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
199 if (access (tty_name, R_OK | W_OK) == 0)
201 *ttydev = strdup (tty_name);
215 /*----------------------------------------------------------------------*/
217 * Returns tty file descriptor, or -1 on failure
220 get_tty (char *ttydev)
222 return open (ttydev, O_RDWR | O_NOCTTY, 0);
225 /*----------------------------------------------------------------------*/
227 * Make our tty a controlling tty so that /dev/tty points to us
230 control_tty (int fd_tty, const char *ttydev)
235 /* ---------------------------------------- */
239 # if defined(HAVE_SETPGID)
241 # elif defined(HAVE_SETPGRP)
245 /* ---------------------------------------- */
247 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
250 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
255 /* ---------------------------------------- */
256 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
258 close (fd); /* ouch: still have controlling tty */
260 /* ---------------------------------------- */
261 #if defined(PTYS_ARE_PTMX) && defined(I_PUSH)
263 * Push STREAMS modules:
264 * ptem: pseudo-terminal hardware emulation module.
265 * ldterm: standard terminal line discipline.
266 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
268 * After we push the STREAMS modules, the first open () on the slave side
269 * (i.e. the next section between the dashes giving us "tty opened OK")
270 * should make the "ptem" (or "ldterm" depending upon either which OS
271 * version or which set of manual pages you have) module give us a
272 * controlling terminal. We must already have close ()d the master side
273 * fd in this child process before we push STREAMS modules on because the
274 * documentation is really unclear about whether it is any close () on
275 * the master side or the last close () - i.e. a proper STREAMS dismantling
276 * close () - on the master side which causes a hang up to be sent
277 * through - Geoff Wing
279 # ifdef HAVE_ISASTREAM
280 if (isastream (fd_tty) == 1)
283 ioctl (fd_tty, I_PUSH, "ptem");
284 ioctl (fd_tty, I_PUSH, "ldterm");
285 ioctl (fd_tty, I_PUSH, "ttcompat");
288 /* ---------------------------------------- */
289 # if defined(TIOCSCTTY)
290 fd = ioctl (fd_tty, TIOCSCTTY, NULL);
291 # elif defined(TIOCSETCTTY)
292 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
294 fd = open (ttydev, O_RDWR);
298 /* ---------------------------------------- */
299 fd = open ("/dev/tty", O_WRONLY);
301 return -1; /* fatal */
303 /* ---------------------------------------- */
304 #endif /* ! __QNX__ */
309 #ifndef NO_SETOWNER_TTYDEV
310 static struct ttyconf {
316 #ifdef TTY_GID_SUPPORT
317 struct group *gr = getgrnam ("tty");
320 { /* change group ownership of tty to "tty" */
321 mode = S_IRUSR | S_IWUSR | S_IWGRP;
325 #endif /* TTY_GID_SUPPORT */
327 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
334 rxvt_ptytty::privileges (rxvt_privaction action)
336 rxvt_privileges (RESTORE);
340 //next_tty_action = RESTORE;
341 # ifndef RESET_TTY_TO_COMMON_DEFAULTS
342 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
343 if (lstat (name, &savestat) < 0) /* you lose out */
344 ;//next_tty_action = IGNORE;
349 chown (name, getuid (), ttyconf.gid); /* fail silently */
350 chmod (name, ttyconf.mode);
358 { /* action == RESTORE */
359 //next_tty_action = IGNORE;
360 # ifndef RESET_TTY_TO_COMMON_DEFAULTS
361 chmod (name, savestat.st_mode);
362 chown (name, savestat.st_uid, savestat.st_gid);
364 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
370 rxvt_privileges (IGNORE);
374 rxvt_ptytty::rxvt_ptytty ()
380 rxvt_ptytty::~rxvt_ptytty ()
387 rxvt_ptytty::close_tty ()
389 if (tty >= 0) close (tty);
396 #ifndef NO_SETOWNER_TTYDEV
398 privileges (RESTORE);
401 if (pty >= 0) close (pty);
410 rxvt_ptytty::make_controlling_tty ()
412 return control_tty (tty, name) >= 0;
418 /* get master (pty) */
419 if ((pty = get_pty (&tty, &name)) < 0)
422 fcntl (pty, F_SETFL, O_NONBLOCK);
424 /* get slave (tty) */
427 #ifndef NO_SETOWNER_TTYDEV
431 if ((tty = get_tty (name)) < 0)
441 /*----------------------- end-of-file (C source) -----------------------*/