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Revision 1.35 by root, Tue Jan 17 10:19:13 2006 UTC vs.
Revision 1.70 by sf-exg, Wed Jul 21 08:46:13 2010 UTC

1// This file is part of libptytty. Do not make local modifications.
2// http://software.schmorp.de/pkg/libptytty
3
1/*--------------------------------*-C-*---------------------------------* 4/*----------------------------------------------------------------------*
2 * File: ptytty.C 5 * File: ptytty.C
3 *----------------------------------------------------------------------* 6 *----------------------------------------------------------------------*
4 * 7 *
5 * All portions of code are copyright by their respective author/s. 8 * All portions of code are copyright by their respective author/s.
6 * Copyright (c) 1999-2001 Geoff Wing <gcw@pobox.com> 9 * Copyright (c) 1999-2001 Geoff Wing <gcw@pobox.com>
7 * Copyright (c) 2004-2006 Marc Lehmann <pcg@goof.com> 10 * Copyright (c) 2004-2006 Marc Lehmann <pcg@goof.com>
11 * Copyright (c) 2006 Emanuele Giaquinta <e.giaquinta@glauco.it>
8 * 12 *
9 * This program is free software; you can redistribute it and/or modify 13 * 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 14 * 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 15 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version. 16 * (at your option) any later version.
… …
19 * You should have received a copy of the GNU General Public License 23 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software 24 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 25 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 *---------------------------------------------------------------------*/ 26 *---------------------------------------------------------------------*/
23 27
24#include "../config.h" /* NECESSARY */ 28#include "config.h"
29
25#include "rxvt.h" 30#include "ptytty.h"
26 31
27# include <cstdlib> 32#include <cstdlib>
28# include <cstring> 33#include <cstring>
34#include <csignal>
29 35
30#ifdef HAVE_SYS_TYPES_H
31# include <sys/types.h> 36#include <sys/types.h>
32#endif 37#include <sys/stat.h>
33#ifdef HAVE_UNISTD_H
34# include <unistd.h> 38#include <unistd.h>
35#endif
36#ifdef HAVE_FCNTL_H
37# include <fcntl.h> 39#include <fcntl.h>
38#endif 40
39#ifdef HAVE_SYS_IOCTL_H 41#ifdef HAVE_SYS_IOCTL_H
40# include <sys/ioctl.h> 42# include <sys/ioctl.h>
41#endif 43#endif
42#if defined(PTYS_ARE_PTMX) && defined(HAVE_SYS_STROPTS_H) 44#if defined(HAVE_DEV_PTMX) && defined(HAVE_SYS_STROPTS_H)
43# include <sys/stropts.h> /* for I_PUSH */ 45# include <sys/stropts.h> /* for I_PUSH */
44#endif 46#endif
45#ifdef HAVE_ISASTREAM 47#if defined(HAVE_ISASTREAM) && defined(HAVE_STROPTS_H)
46# include <stropts.h> 48# include <stropts.h>
47#endif 49#endif
48#if defined(HAVE_PTY_H) 50#if defined(HAVE_PTY_H)
49# include <pty.h> 51# include <pty.h>
50#elif defined(HAVE_LIBUTIL_H) 52#elif defined(HAVE_LIBUTIL_H)
51# include <libutil.h> 53# include <libutil.h>
52#elif defined(HAVE_UTIL_H) 54#elif defined(HAVE_UTIL_H)
53# include <util.h> 55# include <util.h>
54#endif 56#endif
57#ifdef TTY_GID_SUPPORT
58#include <grp.h>
59#endif
55 60
56#include <cstdio> 61#include <cstdio>
57#include <grp.h> 62
63/////////////////////////////////////////////////////////////////////////////
58 64
59/* ------------------------------------------------------------------------- * 65/* ------------------------------------------------------------------------- *
60 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 66 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
61 * ------------------------------------------------------------------------- */ 67 * ------------------------------------------------------------------------- */
62/* 68/*
63 * Returns pty file descriptor, or -1 on failure 69 * Returns pty file descriptor, or -1 on failure
64 * If successful, ttydev is set to the name of the slave device. 70 * 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 71 * fd_tty _may_ also be set to an open fd to the slave device
66 */ 72 */
73#if defined(UNIX98_PTY)
74
67static int 75 static int
68get_pty (int *fd_tty, char **ttydev) 76 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_POSIX) || defined(PTYS_ARE_PTMX)
94
95 { 77 {
96# ifdef PTYS_ARE_GETPT 78 int pfd;
79
80# if defined(HAVE_GETPT)
97 pfd = getpt(); 81 pfd = getpt();
98# else 82# elif defined(HAVE_POSIX_OPENPT)
99# ifdef PTYS_ARE_POSIX
100 pfd = posix_openpt (O_RDWR); 83 pfd = posix_openpt (O_RDWR);
101# else 84# else
102 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 85 pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0);
103# endif 86# endif
104# endif
105 87
106 if (pfd >= 0) 88 if (pfd >= 0)
107 { 89 {
108 if (grantpt (pfd) == 0 /* change slave permissions */ 90 if (grantpt (pfd) == 0 /* change slave permissions */
109 && unlockpt (pfd) == 0) 91 && unlockpt (pfd) == 0)
92 {
110 { /* slave now unlocked */ 93 /* slave now unlocked */
111 *ttydev = strdup (ptsname (pfd)); /* get slave's name */ 94 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
112 return pfd; 95 return pfd;
113 } 96 }
97
114 close (pfd); 98 close (pfd);
115 } 99 }
100
101 return -1;
116 } 102 }
117# endif
118#endif
119 103
120#ifdef PTYS_ARE_PTC 104#elif defined(HAVE_OPENPTY)
121 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
122 {
123 *ttydev = strdup (ttyname (pfd));
124 return pfd;
125 }
126#endif
127 105
128#ifdef PTYS_ARE_CLONE 106 static int
129 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 107 get_pty (int *fd_tty, char **ttydev)
130 {
131 *ttydev = strdup (ptsname (pfd));
132 return pfd;
133 }
134#endif
135
136#ifdef PTYS_ARE_NUMERIC
137 { 108 {
138 int idx; 109 int pfd;
139 char *c1, *c2; 110 int res;
140 char pty_name[] = "/dev/ptyp???";
141 char tty_name[] = "/dev/ttyp???";
142 111
143 c1 = &(pty_name[sizeof (pty_name) - 4]); 112 res = openpty (&pfd, fd_tty, NULL, NULL, NULL);
144 c2 = &(tty_name[sizeof (tty_name) - 4]); 113
145 for (idx = 0; idx < 256; idx++) 114 if (res != -1)
146 { 115 {
147 sprintf (c1, "%d", idx); 116 *ttydev = strdup (ttyname (*fd_tty));
148 sprintf (c2, "%d", idx); 117 return pfd;
149 if (access (tty_name, F_OK) < 0) 118 }
119
120 return -1;
121 }
122
123#elif defined(HAVE__GETPTY)
124
125 static int
126 get_pty (int *fd_tty, char **ttydev)
127 {
128 int pfd;
129 char *slave;
130
131 slave = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
132
133 if (slave != NULL)
134 {
135 *ttydev = strdup (slave);
136 return pfd;
137 }
138
139 return -1;
140 }
141
142#else
143
144 /* Based on the code in openssh/openbsd-compat/bsd-openpty.c */
145 static int
146 get_pty (int *fd_tty, char **ttydev)
147 {
148 int pfd;
149 int i;
150 char pty_name[32];
151 char tty_name[32];
152 const char *majors = "pqrstuvwxyzabcde";
153 const char *minors = "0123456789abcdef";
154
155 for (i = 0; i < 256; i++)
156 {
157 snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]);
158 snprintf(tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]);
159
160 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
150 { 161 {
151 idx = 256; 162 snprintf(pty_name, 32, "/dev/ptyp%d", i);
152 break; 163 snprintf(tty_name, 32, "/dev/ttyp%d", i);
164 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
165 continue;
153 } 166 }
154 167
155 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 168 if (access (tty_name, R_OK | W_OK) == 0)
156 { 169 {
157 if (access (tty_name, R_OK | W_OK) == 0)
158 {
159 *ttydev = strdup (tty_name); 170 *ttydev = strdup (tty_name);
160 return pfd; 171 return pfd;
161 }
162
163 close (pfd);
164 } 172 }
173
174 close (pfd);
165 } 175 }
176
177 return -1;
166 } 178 }
167#endif
168 179
169#ifdef PTYS_ARE_SEARCHED
170 {
171 const char *c1, *c2;
172 char pty_name[] = "/dev/pty??";
173 char tty_name[] = "/dev/tty??";
174
175# ifndef PTYCHAR1
176# define PTYCHAR1 "pqrstuvwxyz"
177# endif 180#endif
178# ifndef PTYCHAR2
179# define PTYCHAR2 "0123456789abcdef"
180# endif
181
182 for (c1 = PTYCHAR1; *c1; c1++)
183 {
184 pty_name[ (sizeof (pty_name) - 3)] =
185 tty_name[ (sizeof (pty_name) - 3)] = *c1;
186 for (c2 = PTYCHAR2; *c2; c2++)
187 {
188 pty_name[ (sizeof (pty_name) - 2)] =
189 tty_name[ (sizeof (pty_name) - 2)] = *c2;
190 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
191 {
192 if (access (tty_name, R_OK | W_OK) == 0)
193 {
194 *ttydev = strdup (tty_name);
195 return pfd;
196 }
197
198 close (pfd);
199 }
200 }
201 }
202 }
203#endif
204
205 return -1;
206}
207 181
208/*----------------------------------------------------------------------*/ 182/*----------------------------------------------------------------------*/
209/* 183/*
210 * Returns tty file descriptor, or -1 on failure 184 * Returns tty file descriptor, or -1 on failure
211 */ 185 */
212static int 186static int
213get_tty (char *ttydev) 187get_tty (char *ttydev)
214{ 188{
215 return open (ttydev, O_RDWR | O_NOCTTY, 0); 189 return open (ttydev, O_RDWR | O_NOCTTY, 0);
… …
218/*----------------------------------------------------------------------*/ 192/*----------------------------------------------------------------------*/
219/* 193/*
220 * Make our tty a controlling tty so that /dev/tty points to us 194 * Make our tty a controlling tty so that /dev/tty points to us
221 */ 195 */
222static int 196static int
223control_tty (int fd_tty, const char *ttydev) 197control_tty (int fd_tty)
224{ 198{
225#ifndef __QNX__
226 int fd; 199 int fd;
227 200
228 /* ---------------------------------------- */
229# ifdef HAVE_SETSID
230 setsid (); 201 setsid ();
231# endif
232# if defined(HAVE_SETPGID)
233 setpgid (0, 0);
234# elif defined(HAVE_SETPGRP)
235 setpgrp (0, 0);
236# endif
237 202
238 /* ---------------------------------------- */
239# ifdef TIOCNOTTY
240 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
241 if (fd >= 0)
242 {
243 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
244 close (fd);
245 }
246# endif
247
248 /* ---------------------------------------- */
249 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
250 if (fd >= 0)
251 close (fd); /* ouch: still have controlling tty */
252
253 /* ---------------------------------------- */
254#if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 203#if defined(HAVE_DEV_PTMX) && defined(I_PUSH)
255 /* 204 /*
256 * Push STREAMS modules: 205 * Push STREAMS modules:
257 * ptem: pseudo-terminal hardware emulation module. 206 * ptem: pseudo-terminal hardware emulation module.
258 * ldterm: standard terminal line discipline. 207 * ldterm: standard terminal line discipline.
259 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 208 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
… …
267 * documentation is really unclear about whether it is any close () on 216 * documentation is really unclear about whether it is any close () on
268 * the master side or the last close () - i.e. a proper STREAMS dismantling 217 * the master side or the last close () - i.e. a proper STREAMS dismantling
269 * close () - on the master side which causes a hang up to be sent 218 * close () - on the master side which causes a hang up to be sent
270 * through - Geoff Wing 219 * through - Geoff Wing
271 */ 220 */
272# ifdef HAVE_ISASTREAM 221#if defined(HAVE_ISASTREAM) && defined(HAVE_STROPTS_H)
273 if (isastream (fd_tty) == 1) 222 if (isastream (fd_tty) == 1)
274# endif 223# endif
275 { 224 {
276 ioctl (fd_tty, I_PUSH, "ptem"); 225 ioctl (fd_tty, I_PUSH, "ptem");
277 ioctl (fd_tty, I_PUSH, "ldterm"); 226 ioctl (fd_tty, I_PUSH, "ldterm");
278 ioctl (fd_tty, I_PUSH, "ttcompat"); 227 ioctl (fd_tty, I_PUSH, "ttcompat");
279 } 228 }
280#endif 229#endif
281 /* ---------------------------------------- */ 230
282# if defined(TIOCSCTTY) 231#ifdef TIOCSCTTY
283 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 232 ioctl (fd_tty, TIOCSCTTY, NULL);
284# elif defined(TIOCSETCTTY)
285 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
286# else 233#else
287 fd = open (ttydev, O_RDWR); 234 fd = open (ttyname (fd_tty), O_RDWR);
288 if (fd >= 0) 235 if (fd >= 0)
289 close (fd); 236 close (fd);
290# endif 237#endif
291 /* ---------------------------------------- */ 238
292 fd = open ("/dev/tty", O_WRONLY); 239 fd = open ("/dev/tty", O_WRONLY);
293 if (fd < 0) 240 if (fd < 0)
294 return -1; /* fatal */ 241 return -1; /* fatal */
242
295 close (fd); 243 close (fd);
296 /* ---------------------------------------- */
297#endif /* ! __QNX__ */
298 244
299 return 0; 245 return 0;
300} 246}
301 247
302#ifndef NO_SETOWNER_TTYDEV 248void
249ptytty::close_tty ()
250{
251 if (tty < 0)
252 return;
253
254 close (tty);
255 tty = -1;
256}
257
258bool
259ptytty::make_controlling_tty ()
260{
261 return control_tty (tty) >= 0;
262}
263
264void
265ptytty::set_utf8_mode (bool on)
266{
267#ifdef IUTF8
268 if (pty < 0)
269 return;
270
271 struct termios tio;
272
273 if (tcgetattr (pty, &tio) != -1)
274 {
275 tcflag_t new_cflag = tio.c_iflag;
276
277 if (on)
278 new_cflag |= IUTF8;
279 else
280 new_cflag &= ~IUTF8;
281
282 if (new_cflag != tio.c_iflag)
283 {
284 tio.c_iflag = new_cflag;
285 tcsetattr (pty, TCSANOW, &tio);
286 }
287 }
288#endif
289}
290
303static struct ttyconf { 291static struct ttyconf {
304 gid_t gid; 292 gid_t gid;
305 mode_t mode; 293 mode_t mode;
306 294
307 ttyconf () 295 ttyconf ()
308 { 296 {
309#ifdef TTY_GID_SUPPORT 297#ifdef TTY_GID_SUPPORT
310 struct group *gr = getgrnam ("tty"); 298 struct group *gr = getgrnam ("tty");
311 299
312 if (gr) 300 if (gr)
301 {
313 { /* change group ownership of tty to "tty" */ 302 /* change group ownership of tty to "tty" */
314 mode = S_IRUSR | S_IWUSR | S_IWGRP; 303 mode = S_IRUSR | S_IWUSR | S_IWGRP;
315 gid = gr->gr_gid; 304 gid = gr->gr_gid;
316 } 305 }
317 else 306 else
318#endif /* TTY_GID_SUPPORT */ 307#endif /* TTY_GID_SUPPORT */
319 { 308 {
320 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; 309 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
321 gid = getgid (); 310 gid = 0;
322 } 311 }
323 } 312 }
324} ttyconf; 313} ttyconf;
325 314
315ptytty_unix::ptytty_unix ()
316{
317 name = 0;
318#if UTMP_SUPPORT
319 cmd_pid = 0;
320#endif
321}
322
323ptytty_unix::~ptytty_unix ()
324{
325#if UTMP_SUPPORT
326 logout ();
327#endif
328 put ();
329}
330
326void 331void
327rxvt_ptytty::privileges (rxvt_privaction action) 332ptytty_unix::put ()
328{ 333{
329 if (!name || !*name) 334 if (name)
330 return;
331
332 rxvt_privileges (RESTORE);
333
334 if (action == SAVE)
335 {
336# ifndef RESET_TTY_TO_COMMON_DEFAULTS
337 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
338 if (lstat (name, &savestat) < 0) /* you lose out */
339 ;
340 else
341# endif
342 {
343 saved = true;
344 chown (name, getuid (), ttyconf.gid); /* fail silently */
345 chmod (name, ttyconf.mode);
346# ifdef HAVE_REVOKE
347 revoke (name);
348# endif
349 }
350 } 335 {
351 else 336 chmod (name, RESTORE_TTY_MODE);
352 { /* action == RESTORE */
353# ifndef RESET_TTY_TO_COMMON_DEFAULTS
354 if (saved)
355 {
356 chmod (name, savestat.st_mode);
357 chown (name, savestat.st_uid, savestat.st_gid);
358 }
359# else
360 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
361 chown (name, 0, 0); 337 chown (name, 0, ttyconf.gid);
362# endif
363
364 } 338 }
365 339
366 rxvt_privileges (IGNORE); 340 close_tty ();
367}
368#endif
369 341
370rxvt_ptytty::rxvt_ptytty () 342 if (pty >= 0)
371{ 343 close (pty);
344
345 free (name);
346
372 pty = tty = -1; 347 pty = tty = -1;
373 name = 0; 348 name = 0;
374#ifndef NO_SETOWNER_TTYDEV
375 saved = false;
376#endif
377#if UTMP_SUPPORT
378 cmd_pid = 0;
379#endif
380}
381
382rxvt_ptytty::~rxvt_ptytty ()
383{
384 logout ();
385 put ();
386}
387
388void
389
390rxvt_ptytty::close_tty ()
391{
392 if (tty < 0)
393 return;
394
395 close (tty);
396 tty = -1;
397}
398
399void
400rxvt_ptytty::put ()
401{
402#ifndef NO_SETOWNER_TTYDEV
403 privileges (RESTORE);
404#endif
405
406 if (pty >= 0) close (pty);
407 close_tty ();
408 free (name);
409
410 pty = tty = -1;
411 name = 0;
412} 349}
413 350
414bool 351bool
415rxvt_ptytty::make_controlling_tty () 352ptytty_unix::get ()
416{
417 return control_tty (tty, name) >= 0;
418}
419
420bool
421rxvt_ptytty::get ()
422{ 353{
423 /* get master (pty) */ 354 /* get master (pty) */
424 if ((pty = get_pty (&tty, &name)) < 0) 355 if ((pty = get_pty (&tty, &name)) < 0)
425 return false; 356 return false;
426 357
… …
428 359
429 /* get slave (tty) */ 360 /* get slave (tty) */
430 if (tty < 0) 361 if (tty < 0)
431 { 362 {
432#ifndef NO_SETOWNER_TTYDEV 363#ifndef NO_SETOWNER_TTYDEV
433 privileges (SAVE); 364 chown (name, getuid (), ttyconf.gid); /* fail silently */
365 chmod (name, ttyconf.mode);
366# ifdef HAVE_REVOKE
367 revoke (name);
368# endif
434#endif 369#endif
435 370
436 if ((tty = get_tty (name)) < 0) 371 if ((tty = get_tty (name)) < 0)
437 { 372 {
438 put (); 373 put ();
… …
441 } 376 }
442 377
443 return true; 378 return true;
444} 379}
445 380
446void
447rxvt_ptytty::set_utf8_mode (bool on)
448{
449#ifdef IUTF8
450 if (pty < 0)
451 return;
452
453 struct termios tio;
454
455 if (tcgetattr (pty, &tio) != -1)
456 {
457 tcflag_t new_cflag = tio.c_iflag;
458
459 if (on)
460 new_cflag |= IUTF8;
461 else
462 new_cflag &= ~IUTF8;
463
464 if (new_cflag != tio.c_iflag)
465 {
466 tio.c_iflag = new_cflag;
467 tcsetattr (pty, TCSANOW, &tio);
468 }
469 }
470#endif
471}
472
473/*----------------------- end-of-file (C source) -----------------------*/
474

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