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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.33 by root, Wed Jan 11 23:08:54 2006 UTC vs.
Revision 1.71 by root, Mon Feb 21 07:41:02 2011 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 <schmorp@schmorp.de>
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_POSIX) || defined(PTYS_ARE_PTMX)
94
95 { 77 {
96# ifdef PTYS_ARE_POSIX 78 int pfd;
79
80# if defined(HAVE_GETPT)
81 pfd = getpt();
82# elif defined(HAVE_POSIX_OPENPT)
97 pfd = posix_openpt (O_RDWR); 83 pfd = posix_openpt (O_RDWR);
98# else 84# else
99 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 85 pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0);
100# endif 86# endif
101 87
102 if (pfd >= 0) 88 if (pfd >= 0)
103 { 89 {
104 if (grantpt (pfd) == 0 /* change slave permissions */ 90 if (grantpt (pfd) == 0 /* change slave permissions */
105 && unlockpt (pfd) == 0) 91 && unlockpt (pfd) == 0)
92 {
106 { /* slave now unlocked */ 93 /* slave now unlocked */
107 *ttydev = strdup (ptsname (pfd)); /* get slave's name */ 94 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
108 return pfd; 95 return pfd;
109 } 96 }
97
110 close (pfd); 98 close (pfd);
111 } 99 }
100
101 return -1;
112 } 102 }
113# endif
114#endif
115 103
116#ifdef PTYS_ARE_PTC 104#elif defined(HAVE_OPENPTY)
117 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
118 {
119 *ttydev = strdup (ttyname (pfd));
120 return pfd;
121 }
122#endif
123 105
124#ifdef PTYS_ARE_CLONE 106 static int
125 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 107 get_pty (int *fd_tty, char **ttydev)
126 {
127 *ttydev = strdup (ptsname (pfd));
128 return pfd;
129 }
130#endif
131
132#ifdef PTYS_ARE_NUMERIC
133 { 108 {
134 int idx; 109 int pfd;
135 char *c1, *c2; 110 int res;
136 char pty_name[] = "/dev/ptyp???";
137 char tty_name[] = "/dev/ttyp???";
138 111
139 c1 = &(pty_name[sizeof (pty_name) - 4]); 112 res = openpty (&pfd, fd_tty, NULL, NULL, NULL);
140 c2 = &(tty_name[sizeof (tty_name) - 4]); 113
141 for (idx = 0; idx < 256; idx++) 114 if (res != -1)
142 { 115 {
143 sprintf (c1, "%d", idx); 116 *ttydev = strdup (ttyname (*fd_tty));
144 sprintf (c2, "%d", idx); 117 return pfd;
145 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)
146 { 161 {
147 idx = 256; 162 snprintf(pty_name, 32, "/dev/ptyp%d", i);
148 break; 163 snprintf(tty_name, 32, "/dev/ttyp%d", i);
164 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
165 continue;
149 } 166 }
150 167
151 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 168 if (access (tty_name, R_OK | W_OK) == 0)
152 { 169 {
153 if (access (tty_name, R_OK | W_OK) == 0)
154 {
155 *ttydev = strdup (tty_name); 170 *ttydev = strdup (tty_name);
156 return pfd; 171 return pfd;
157 }
158
159 close (pfd);
160 } 172 }
173
174 close (pfd);
161 } 175 }
176
177 return -1;
162 } 178 }
163#endif
164 179
165#ifdef PTYS_ARE_SEARCHED
166 {
167 const char *c1, *c2;
168 char pty_name[] = "/dev/pty??";
169 char tty_name[] = "/dev/tty??";
170
171# ifndef PTYCHAR1
172# define PTYCHAR1 "pqrstuvwxyz"
173# endif 180#endif
174# ifndef PTYCHAR2
175# define PTYCHAR2 "0123456789abcdef"
176# endif
177
178 for (c1 = PTYCHAR1; *c1; c1++)
179 {
180 pty_name[ (sizeof (pty_name) - 3)] =
181 tty_name[ (sizeof (pty_name) - 3)] = *c1;
182 for (c2 = PTYCHAR2; *c2; c2++)
183 {
184 pty_name[ (sizeof (pty_name) - 2)] =
185 tty_name[ (sizeof (pty_name) - 2)] = *c2;
186 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
187 {
188 if (access (tty_name, R_OK | W_OK) == 0)
189 {
190 *ttydev = strdup (tty_name);
191 return pfd;
192 }
193
194 close (pfd);
195 }
196 }
197 }
198 }
199#endif
200
201 return -1;
202}
203 181
204/*----------------------------------------------------------------------*/ 182/*----------------------------------------------------------------------*/
205/* 183/*
206 * Returns tty file descriptor, or -1 on failure 184 * Returns tty file descriptor, or -1 on failure
207 */ 185 */
208static int 186static int
209get_tty (char *ttydev) 187get_tty (char *ttydev)
210{ 188{
211 return open (ttydev, O_RDWR | O_NOCTTY, 0); 189 return open (ttydev, O_RDWR | O_NOCTTY, 0);
… …
214/*----------------------------------------------------------------------*/ 192/*----------------------------------------------------------------------*/
215/* 193/*
216 * 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
217 */ 195 */
218static int 196static int
219control_tty (int fd_tty, const char *ttydev) 197control_tty (int fd_tty)
220{ 198{
221#ifndef __QNX__
222 int fd; 199 int fd;
223 200
224 /* ---------------------------------------- */
225# ifdef HAVE_SETSID
226 setsid (); 201 setsid ();
227# endif
228# if defined(HAVE_SETPGID)
229 setpgid (0, 0);
230# elif defined(HAVE_SETPGRP)
231 setpgrp (0, 0);
232# endif
233 202
234 /* ---------------------------------------- */
235# ifdef TIOCNOTTY
236 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
237 if (fd >= 0)
238 {
239 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
240 close (fd);
241 }
242# endif
243
244 /* ---------------------------------------- */
245 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
246 if (fd >= 0)
247 close (fd); /* ouch: still have controlling tty */
248
249 /* ---------------------------------------- */
250#if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 203#if defined(HAVE_DEV_PTMX) && defined(I_PUSH)
251 /* 204 /*
252 * Push STREAMS modules: 205 * Push STREAMS modules:
253 * ptem: pseudo-terminal hardware emulation module. 206 * ptem: pseudo-terminal hardware emulation module.
254 * ldterm: standard terminal line discipline. 207 * ldterm: standard terminal line discipline.
255 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 208 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
… …
263 * documentation is really unclear about whether it is any close () on 216 * documentation is really unclear about whether it is any close () on
264 * 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
265 * 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
266 * through - Geoff Wing 219 * through - Geoff Wing
267 */ 220 */
268# ifdef HAVE_ISASTREAM 221#if defined(HAVE_ISASTREAM) && defined(HAVE_STROPTS_H)
269 if (isastream (fd_tty) == 1) 222 if (isastream (fd_tty) == 1)
270# endif 223# endif
271 { 224 {
272 ioctl (fd_tty, I_PUSH, "ptem"); 225 ioctl (fd_tty, I_PUSH, "ptem");
273 ioctl (fd_tty, I_PUSH, "ldterm"); 226 ioctl (fd_tty, I_PUSH, "ldterm");
274 ioctl (fd_tty, I_PUSH, "ttcompat"); 227 ioctl (fd_tty, I_PUSH, "ttcompat");
275 } 228 }
276#endif 229#endif
277 /* ---------------------------------------- */ 230
278# if defined(TIOCSCTTY) 231#ifdef TIOCSCTTY
279 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 232 ioctl (fd_tty, TIOCSCTTY, NULL);
280# elif defined(TIOCSETCTTY)
281 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
282# else 233#else
283 fd = open (ttydev, O_RDWR); 234 fd = open (ttyname (fd_tty), O_RDWR);
284 if (fd >= 0) 235 if (fd >= 0)
285 close (fd); 236 close (fd);
286# endif 237#endif
287 /* ---------------------------------------- */ 238
288 fd = open ("/dev/tty", O_WRONLY); 239 fd = open ("/dev/tty", O_WRONLY);
289 if (fd < 0) 240 if (fd < 0)
290 return -1; /* fatal */ 241 return -1; /* fatal */
242
291 close (fd); 243 close (fd);
292 /* ---------------------------------------- */
293#endif /* ! __QNX__ */
294 244
295 return 0; 245 return 0;
296} 246}
297 247
298#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
299static struct ttyconf { 291static struct ttyconf {
300 gid_t gid; 292 gid_t gid;
301 mode_t mode; 293 mode_t mode;
302 294
303 ttyconf () 295 ttyconf ()
304 { 296 {
305#ifdef TTY_GID_SUPPORT 297#ifdef TTY_GID_SUPPORT
306 struct group *gr = getgrnam ("tty"); 298 struct group *gr = getgrnam ("tty");
307 299
308 if (gr) 300 if (gr)
301 {
309 { /* change group ownership of tty to "tty" */ 302 /* change group ownership of tty to "tty" */
310 mode = S_IRUSR | S_IWUSR | S_IWGRP; 303 mode = S_IRUSR | S_IWUSR | S_IWGRP;
311 gid = gr->gr_gid; 304 gid = gr->gr_gid;
312 } 305 }
313 else 306 else
314#endif /* TTY_GID_SUPPORT */ 307#endif /* TTY_GID_SUPPORT */
315 { 308 {
316 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; 309 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
317 gid = getgid (); 310 gid = 0;
318 } 311 }
319 } 312 }
320} ttyconf; 313} ttyconf;
321 314
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
322void 331void
323rxvt_ptytty::privileges (rxvt_privaction action) 332ptytty_unix::put ()
324{ 333{
325 if (!name || !*name) 334 if (name)
326 return;
327
328 rxvt_privileges (RESTORE);
329
330 if (action == SAVE)
331 {
332# ifndef RESET_TTY_TO_COMMON_DEFAULTS
333 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
334 if (lstat (name, &savestat) < 0) /* you lose out */
335 ;
336 else
337# endif
338 {
339 saved = true;
340 chown (name, getuid (), ttyconf.gid); /* fail silently */
341 chmod (name, ttyconf.mode);
342# ifdef HAVE_REVOKE
343 revoke (name);
344# endif
345 }
346 } 335 {
347 else 336 chmod (name, RESTORE_TTY_MODE);
348 { /* action == RESTORE */
349# ifndef RESET_TTY_TO_COMMON_DEFAULTS
350 if (saved)
351 {
352 chmod (name, savestat.st_mode);
353 chown (name, savestat.st_uid, savestat.st_gid);
354 }
355# else
356 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
357 chown (name, 0, 0); 337 chown (name, 0, ttyconf.gid);
358# endif
359
360 } 338 }
361 339
362 rxvt_privileges (IGNORE); 340 close_tty ();
363}
364#endif
365 341
366rxvt_ptytty::rxvt_ptytty () 342 if (pty >= 0)
367{ 343 close (pty);
344
345 free (name);
346
368 pty = tty = -1; 347 pty = tty = -1;
369 name = 0; 348 name = 0;
370#ifndef NO_SETOWNER_TTYDEV
371 saved = false;
372#endif
373}
374
375rxvt_ptytty::~rxvt_ptytty ()
376{
377 put ();
378}
379
380void
381
382rxvt_ptytty::close_tty ()
383{
384 if (tty < 0)
385 return;
386
387 close (tty);
388 tty = -1;
389}
390
391void
392rxvt_ptytty::put ()
393{
394#ifndef NO_SETOWNER_TTYDEV
395 privileges (RESTORE);
396#endif
397
398 if (pty >= 0) close (pty);
399 close_tty ();
400 free (name);
401
402 pty = tty = -1;
403 name = 0;
404} 349}
405 350
406bool 351bool
407rxvt_ptytty::make_controlling_tty () 352ptytty_unix::get ()
408{
409 return control_tty (tty, name) >= 0;
410}
411
412bool
413rxvt_ptytty::get ()
414{ 353{
415 /* get master (pty) */ 354 /* get master (pty) */
416 if ((pty = get_pty (&tty, &name)) < 0) 355 if ((pty = get_pty (&tty, &name)) < 0)
417 return false; 356 return false;
418 357
… …
420 359
421 /* get slave (tty) */ 360 /* get slave (tty) */
422 if (tty < 0) 361 if (tty < 0)
423 { 362 {
424#ifndef NO_SETOWNER_TTYDEV 363#ifndef NO_SETOWNER_TTYDEV
425 privileges (SAVE); 364 chown (name, getuid (), ttyconf.gid); /* fail silently */
365 chmod (name, ttyconf.mode);
366# ifdef HAVE_REVOKE
367 revoke (name);
368# endif
426#endif 369#endif
427 370
428 if ((tty = get_tty (name)) < 0) 371 if ((tty = get_tty (name)) < 0)
429 { 372 {
430 put (); 373 put ();
… …
433 } 376 }
434 377
435 return true; 378 return true;
436} 379}
437 380
438void
439rxvt_ptytty::set_utf8_mode (bool on)
440{
441#ifdef IUTF8
442 if (pty < 0)
443 return;
444
445 struct termios tio;
446
447 if (tcgetattr (pty, &tio) != -1)
448 {
449 tcflag_t new_cflag = tio.c_iflag;
450
451 if (on)
452 new_cflag |= IUTF8;
453 else
454 new_cflag &= ~IUTF8;
455
456 if (new_cflag != tio.c_iflag)
457 {
458 tio.c_iflag = new_cflag;
459 tcsetattr (pty, TCSANOW, &tio);
460 }
461 }
462#endif
463}
464
465/*----------------------- end-of-file (C source) -----------------------*/
466

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