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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.36 by root, Tue Jan 17 10:59:32 2006 UTC vs.
Revision 1.68 by ayin, Tue Dec 11 21:49:12 2007 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
33#ifdef HAVE_UNISTD_H
34# include <unistd.h> 37#include <unistd.h>
35#endif
36#ifdef HAVE_FCNTL_H
37# include <fcntl.h> 38#include <fcntl.h>
38#endif 39
39#ifdef HAVE_SYS_IOCTL_H 40#ifdef HAVE_SYS_IOCTL_H
40# include <sys/ioctl.h> 41# include <sys/ioctl.h>
41#endif 42#endif
42#if defined(PTYS_ARE_PTMX) && defined(HAVE_SYS_STROPTS_H) 43#if defined(HAVE_DEV_PTMX) && defined(HAVE_SYS_STROPTS_H)
43# include <sys/stropts.h> /* for I_PUSH */ 44# include <sys/stropts.h> /* for I_PUSH */
44#endif 45#endif
45#ifdef HAVE_ISASTREAM 46#ifdef HAVE_ISASTREAM
46# include <stropts.h> 47# include <stropts.h>
47#endif 48#endif
… …
50#elif defined(HAVE_LIBUTIL_H) 51#elif defined(HAVE_LIBUTIL_H)
51# include <libutil.h> 52# include <libutil.h>
52#elif defined(HAVE_UTIL_H) 53#elif defined(HAVE_UTIL_H)
53# include <util.h> 54# include <util.h>
54#endif 55#endif
56#ifdef TTY_GID_SUPPORT
57#include <grp.h>
58#endif
55 59
56#include <cstdio> 60#include <cstdio>
57#include <grp.h>
58 61
59///////////////////////////////////////////////////////////////////////////// 62/////////////////////////////////////////////////////////////////////////////
60 63
61/* ------------------------------------------------------------------------- * 64/* ------------------------------------------------------------------------- *
62 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 65 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
63 * ------------------------------------------------------------------------- */ 66 * ------------------------------------------------------------------------- */
64/* 67/*
65 * Returns pty file descriptor, or -1 on failure 68 * Returns pty file descriptor, or -1 on failure
66 * If successful, ttydev is set to the name of the slave device. 69 * If successful, ttydev is set to the name of the slave device.
67 * fd_tty _may_ also be set to an open fd to the slave device 70 * fd_tty _may_ also be set to an open fd to the slave device
68 */ 71 */
72#if defined(UNIX98_PTY)
73
69static int 74 static int
70get_pty (int *fd_tty, char **ttydev) 75 get_pty (int *fd_tty, char **ttydev)
71{ 76 {
72 int pfd; 77 int pfd;
73 78
74#ifdef PTYS_ARE_OPENPTY 79# if defined(HAVE_GETPT)
75 char tty_name[sizeof "/dev/pts/????\0"];
76
77 rxvt_privileges(RESTORE);
78 int res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
79 rxvt_privileges(IGNORE);
80
81 if (res != -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#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
95# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_POSIX) || defined(PTYS_ARE_PTMX)
96
97 {
98# ifdef PTYS_ARE_GETPT
99 pfd = getpt(); 80 pfd = getpt();
100# else 81# elif defined(HAVE_POSIX_OPENPT)
101# ifdef PTYS_ARE_POSIX
102 pfd = posix_openpt (O_RDWR); 82 pfd = posix_openpt (O_RDWR);
103# else 83# else
104 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 84 pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0);
105# endif 85# endif
106# endif
107 86
108 if (pfd >= 0) 87 if (pfd >= 0)
109 { 88 {
110 if (grantpt (pfd) == 0 /* change slave permissions */ 89 if (grantpt (pfd) == 0 /* change slave permissions */
111 && unlockpt (pfd) == 0) 90 && unlockpt (pfd) == 0)
91 {
112 { /* slave now unlocked */ 92 /* slave now unlocked */
113 *ttydev = strdup (ptsname (pfd)); /* get slave's name */ 93 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
114 return pfd; 94 return pfd;
115 } 95 }
96
116 close (pfd); 97 close (pfd);
117 } 98 }
118 }
119# endif
120#endif
121 99
122#ifdef PTYS_ARE_PTC 100 return -1;
123 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) 101 }
102
103#elif defined(HAVE_OPENPTY)
104
105 static int
106 get_pty (int *fd_tty, char **ttydev)
107 {
108 int pfd;
109 int res;
110
111 res = openpty (&pfd, fd_tty, NULL, NULL, NULL);
112
113 if (res != -1)
124 { 114 {
125 *ttydev = strdup (ttyname (pfd)); 115 *ttydev = strdup (ttyname (*fd_tty));
116 return pfd;
117 }
118
119 return -1;
120 }
121
122#elif defined(HAVE__GETPTY)
123
124 static int
125 get_pty (int *fd_tty, char **ttydev)
126 {
127 int pfd;
128 char *slave;
129
130 slave = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
131
132 if (slave != NULL) {
133 *ttydev = strdup (slave);
126 return pfd; 134 return pfd;
127 } 135 }
128#endif
129 136
130#ifdef PTYS_ARE_CLONE 137 return -1;
138 }
139
140#elif defined(HAVE_DEV_PTC)
141
142 static int
143 get_pty (int *fd_tty, char **ttydev)
144 {
145 int pfd;
146
131 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 147 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
132 {
133 *ttydev = strdup (ptsname (pfd));
134 return pfd;
135 }
136#endif
137
138#ifdef PTYS_ARE_NUMERIC
139 {
140 int idx;
141 char *c1, *c2;
142 char pty_name[] = "/dev/ptyp???";
143 char tty_name[] = "/dev/ttyp???";
144
145 c1 = &(pty_name[sizeof (pty_name) - 4]);
146 c2 = &(tty_name[sizeof (tty_name) - 4]);
147 for (idx = 0; idx < 256; idx++)
148 { 148 {
149 sprintf (c1, "%d", idx); 149 *ttydev = strdup (ttyname (pfd));
150 sprintf (c2, "%d", idx); 150 return pfd;
151 if (access (tty_name, F_OK) < 0) 151 }
152
153 return -1;
154 }
155
156#elif defined(HAVE_DEV_CLONE)
157
158 static int
159 get_pty (int *fd_tty, char **ttydev)
160 {
161 int pfd;
162
163 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
164 {
165 *ttydev = strdup (ptsname (pfd));
166 return pfd;
167 }
168
169 return -1;
170 }
171
172#else
173
174 /* Based on the code in openssh/openbsd-compat/bsd-openpty.c */
175 static int
176 get_pty (int *fd_tty, char **ttydev)
177 {
178 int pfd;
179 int i;
180 char pty_name[32];
181 char tty_name[32];
182 const char *majors = "pqrstuvwxyzabcde";
183 const char *minors = "0123456789abcdef";
184
185 for (i = 0; i < 256; i++)
186 {
187 snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]);
188 snprintf(tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]);
189
190 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
152 { 191 {
153 idx = 256; 192 snprintf(pty_name, 32, "/dev/ptyp%d", i);
154 break; 193 snprintf(tty_name, 32, "/dev/ttyp%d", i);
194 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
195 continue;
155 } 196 }
156 197
157 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 198 if (access (tty_name, R_OK | W_OK) == 0)
158 { 199 {
159 if (access (tty_name, R_OK | W_OK) == 0)
160 {
161 *ttydev = strdup (tty_name); 200 *ttydev = strdup (tty_name);
162 return pfd; 201 return pfd;
163 }
164
165 close (pfd);
166 } 202 }
203
204 close (pfd);
167 } 205 }
168 }
169#endif
170 206
171#ifdef PTYS_ARE_SEARCHED
172 {
173 const char *c1, *c2;
174 char pty_name[] = "/dev/pty??";
175 char tty_name[] = "/dev/tty??";
176
177# ifndef PTYCHAR1
178# define PTYCHAR1 "pqrstuvwxyz"
179# endif
180# ifndef PTYCHAR2
181# define PTYCHAR2 "0123456789abcdef"
182# endif
183
184 for (c1 = PTYCHAR1; *c1; c1++)
185 {
186 pty_name[ (sizeof (pty_name) - 3)] =
187 tty_name[ (sizeof (pty_name) - 3)] = *c1;
188 for (c2 = PTYCHAR2; *c2; c2++)
189 {
190 pty_name[ (sizeof (pty_name) - 2)] =
191 tty_name[ (sizeof (pty_name) - 2)] = *c2;
192 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
193 {
194 if (access (tty_name, R_OK | W_OK) == 0)
195 {
196 *ttydev = strdup (tty_name);
197 return pfd;
198 }
199
200 close (pfd);
201 }
202 }
203 }
204 }
205#endif
206
207 return -1; 207 return -1;
208} 208 }
209
210#endif
209 211
210/*----------------------------------------------------------------------*/ 212/*----------------------------------------------------------------------*/
211/* 213/*
212 * Returns tty file descriptor, or -1 on failure 214 * Returns tty file descriptor, or -1 on failure
213 */ 215 */
214static int 216static int
215get_tty (char *ttydev) 217get_tty (char *ttydev)
216{ 218{
217 return open (ttydev, O_RDWR | O_NOCTTY, 0); 219 return open (ttydev, O_RDWR | O_NOCTTY, 0);
… …
222 * Make our tty a controlling tty so that /dev/tty points to us 224 * Make our tty a controlling tty so that /dev/tty points to us
223 */ 225 */
224static int 226static int
225control_tty (int fd_tty) 227control_tty (int fd_tty)
226{ 228{
227#ifndef __QNX__
228 int fd; 229 int fd;
229 230
230 /* ---------------------------------------- */
231# ifdef HAVE_SETSID
232 setsid (); 231 setsid ();
233# endif
234# if defined(HAVE_SETPGID)
235 setpgid (0, 0);
236# elif defined(HAVE_SETPGRP)
237 setpgrp (0, 0);
238# endif
239 232
240 /* ---------------------------------------- */
241# ifdef TIOCNOTTY
242 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
243 if (fd >= 0)
244 {
245 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
246 close (fd);
247 }
248# endif
249
250 /* ---------------------------------------- */
251 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
252 if (fd >= 0)
253 close (fd); /* ouch: still have controlling tty */
254
255 /* ---------------------------------------- */
256# if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 233#if defined(HAVE_DEV_PTMX) && defined(I_PUSH)
257 /* 234 /*
258 * Push STREAMS modules: 235 * Push STREAMS modules:
259 * ptem: pseudo-terminal hardware emulation module. 236 * ptem: pseudo-terminal hardware emulation module.
260 * ldterm: standard terminal line discipline. 237 * ldterm: standard terminal line discipline.
261 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 238 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
… …
269 * documentation is really unclear about whether it is any close () on 246 * documentation is really unclear about whether it is any close () on
270 * the master side or the last close () - i.e. a proper STREAMS dismantling 247 * the master side or the last close () - i.e. a proper STREAMS dismantling
271 * close () - on the master side which causes a hang up to be sent 248 * close () - on the master side which causes a hang up to be sent
272 * through - Geoff Wing 249 * through - Geoff Wing
273 */ 250 */
274# ifdef HAVE_ISASTREAM 251# ifdef HAVE_ISASTREAM
275 if (isastream (fd_tty) == 1) 252 if (isastream (fd_tty) == 1)
276# endif 253# endif
277 { 254 {
278 ioctl (fd_tty, I_PUSH, "ptem"); 255 ioctl (fd_tty, I_PUSH, "ptem");
279 ioctl (fd_tty, I_PUSH, "ldterm"); 256 ioctl (fd_tty, I_PUSH, "ldterm");
280 ioctl (fd_tty, I_PUSH, "ttcompat"); 257 ioctl (fd_tty, I_PUSH, "ttcompat");
281 } 258 }
282# endif 259#endif
283 /* ---------------------------------------- */ 260
261#ifdef TIOCSCTTY
284 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 262 ioctl (fd_tty, TIOCSCTTY, NULL);
285 /* ---------------------------------------- */ 263#else
264 fd = open (ttyname (fd_tty), O_RDWR);
265 if (fd >= 0)
266 close (fd);
267#endif
268
286 fd = open ("/dev/tty", O_WRONLY); 269 fd = open ("/dev/tty", O_WRONLY);
287 if (fd < 0) 270 if (fd < 0)
288 return -1; /* fatal */ 271 return -1; /* fatal */
272
289 close (fd); 273 close (fd);
290 /* ---------------------------------------- */
291#endif /* ! __QNX__ */
292 274
293 return 0; 275 return 0;
294} 276}
295 277
296void 278void
297rxvt_ptytty::close_tty () 279ptytty::close_tty ()
298{ 280{
299 if (tty < 0) 281 if (tty < 0)
300 return; 282 return;
301 283
302 close (tty); 284 close (tty);
303 tty = -1; 285 tty = -1;
304} 286}
305 287
306bool 288bool
307rxvt_ptytty::make_controlling_tty () 289ptytty::make_controlling_tty ()
308{ 290{
309 return control_tty (tty) >= 0; 291 return control_tty (tty) >= 0;
310} 292}
311 293
312void 294void
313rxvt_ptytty::set_utf8_mode (bool on) 295ptytty::set_utf8_mode (bool on)
314{ 296{
315#ifdef IUTF8 297#ifdef IUTF8
316 if (pty < 0) 298 if (pty < 0)
317 return; 299 return;
318 300
… …
334 } 316 }
335 } 317 }
336#endif 318#endif
337} 319}
338 320
339/////////////////////////////////////////////////////////////////////////////
340
341#ifndef NO_SETOWNER_TTYDEV
342static struct ttyconf { 321static struct ttyconf {
343 gid_t gid; 322 gid_t gid;
344 mode_t mode; 323 mode_t mode;
345 324
346 ttyconf () 325 ttyconf ()
347 { 326 {
348#ifdef TTY_GID_SUPPORT 327#ifdef TTY_GID_SUPPORT
349 struct group *gr = getgrnam ("tty"); 328 struct group *gr = getgrnam ("tty");
350 329
351 if (gr) 330 if (gr)
331 {
352 { /* change group ownership of tty to "tty" */ 332 /* change group ownership of tty to "tty" */
353 mode = S_IRUSR | S_IWUSR | S_IWGRP; 333 mode = S_IRUSR | S_IWUSR | S_IWGRP;
354 gid = gr->gr_gid; 334 gid = gr->gr_gid;
355 } 335 }
356 else 336 else
357#endif /* TTY_GID_SUPPORT */ 337#endif /* TTY_GID_SUPPORT */
358 { 338 {
359 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; 339 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
360 gid = getgid (); 340 gid = 0;
361 } 341 }
362 } 342 }
363} ttyconf; 343} ttyconf;
364 344
365///////////////////////////////////////////////////////////////////////////// 345ptytty_unix::ptytty_unix ()
346{
347 name = 0;
348#if UTMP_SUPPORT
349 cmd_pid = 0;
350#endif
351}
352
353ptytty_unix::~ptytty_unix ()
354{
355#if UTMP_SUPPORT
356 logout ();
357#endif
358 put ();
359}
366 360
367void 361void
368rxvt_ptytty_unix::privileges (rxvt_privaction action) 362ptytty_unix::put ()
369{ 363{
370 if (!name || !*name) 364 if (name)
371 return;
372
373 rxvt_privileges (RESTORE);
374
375 if (action == SAVE)
376 { 365 {
377# ifndef RESET_TTY_TO_COMMON_DEFAULTS 366 chmod (name, RESTORE_TTY_MODE);
378 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
379 if (lstat (name, &savestat) < 0) /* you lose out */
380 ;
381 else
382# endif
383 {
384 saved = true;
385 chown (name, getuid (), ttyconf.gid); /* fail silently */
386 chmod (name, ttyconf.mode);
387# ifdef HAVE_REVOKE
388 revoke (name);
389# endif
390 }
391 }
392 else
393 { /* action == RESTORE */
394# ifndef RESET_TTY_TO_COMMON_DEFAULTS
395 if (saved)
396 {
397 chmod (name, savestat.st_mode);
398 chown (name, savestat.st_uid, savestat.st_gid);
399 }
400# else
401 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
402 chown (name, 0, 0); 367 chown (name, 0, ttyconf.gid);
403# endif
404
405 } 368 }
406 369
407 rxvt_privileges (IGNORE); 370 close_tty ();
408}
409#endif
410 371
411rxvt_ptytty_unix::rxvt_ptytty_unix () 372 if (pty >= 0)
412{ 373 close (pty);
374
375 free (name);
376
413 pty = tty = -1; 377 pty = tty = -1;
414 name = 0; 378 name = 0;
415#ifndef NO_SETOWNER_TTYDEV
416 saved = false;
417#endif
418#if UTMP_SUPPORT
419 cmd_pid = 0;
420#endif
421}
422
423rxvt_ptytty_unix::~rxvt_ptytty_unix ()
424{
425 logout ();
426 put ();
427}
428
429void
430rxvt_ptytty_unix::put ()
431{
432#ifndef NO_SETOWNER_TTYDEV
433 privileges (RESTORE);
434#endif
435
436 if (pty >= 0) close (pty);
437 close_tty ();
438 free (name);
439
440 pty = tty = -1;
441 name = 0;
442} 379}
443 380
444bool 381bool
445rxvt_ptytty_unix::get () 382ptytty_unix::get ()
446{ 383{
447 /* get master (pty) */ 384 /* get master (pty) */
448 if ((pty = get_pty (&tty, &name)) < 0) 385 if ((pty = get_pty (&tty, &name)) < 0)
449 return false; 386 return false;
450 387
… …
452 389
453 /* get slave (tty) */ 390 /* get slave (tty) */
454 if (tty < 0) 391 if (tty < 0)
455 { 392 {
456#ifndef NO_SETOWNER_TTYDEV 393#ifndef NO_SETOWNER_TTYDEV
457 privileges (SAVE); 394 chown (name, getuid (), ttyconf.gid); /* fail silently */
395 chmod (name, ttyconf.mode);
396# ifdef HAVE_REVOKE
397 revoke (name);
398# endif
458#endif 399#endif
459 400
460 if ((tty = get_tty (name)) < 0) 401 if ((tty = get_tty (name)) < 0)
461 { 402 {
462 put (); 403 put ();
… …
465 } 406 }
466 407
467 return true; 408 return true;
468} 409}
469 410
470/*----------------------- end-of-file (C source) -----------------------*/
471

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