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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.32 by root, Wed Jan 11 20:46:46 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> 61
62/////////////////////////////////////////////////////////////////////////////
58 63
59/* ------------------------------------------------------------------------- * 64/* ------------------------------------------------------------------------- *
60 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 65 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
61 * ------------------------------------------------------------------------- */ 66 * ------------------------------------------------------------------------- */
62/* 67/*
63 * Returns pty file descriptor, or -1 on failure 68 * Returns pty file descriptor, or -1 on failure
64 * 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.
65 * 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
66 */ 71 */
72#if defined(UNIX98_PTY)
73
67static int 74 static int
68get_pty (int *fd_tty, char **ttydev) 75 get_pty (int *fd_tty, char **ttydev)
69{ 76 {
70 int pfd; 77 int pfd;
71 78
72#ifdef PTYS_ARE_OPENPTY 79# if defined(HAVE_GETPT)
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_PTMX)
94
95 {
96# ifdef PTYS_ARE_GETPT
97 pfd = getpt (); 80 pfd = getpt();
81# elif defined(HAVE_POSIX_OPENPT)
82 pfd = posix_openpt (O_RDWR);
98# else 83# else
99 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 84 pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0);
100# endif 85# endif
101 86
102 if (pfd >= 0) 87 if (pfd >= 0)
103 { 88 {
104 if (grantpt (pfd) == 0 /* change slave permissions */ 89 if (grantpt (pfd) == 0 /* change slave permissions */
105 && unlockpt (pfd) == 0) 90 && unlockpt (pfd) == 0)
91 {
106 { /* slave now unlocked */ 92 /* slave now unlocked */
107 *ttydev = strdup (ptsname (pfd)); /* get slave's name */ 93 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
108 return pfd; 94 return pfd;
109 } 95 }
96
110 close (pfd); 97 close (pfd);
111 } 98 }
112 }
113# endif
114#endif
115 99
116#ifdef PTYS_ARE_PTC 100 return -1;
117 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)
118 { 114 {
119 *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);
120 return pfd; 134 return pfd;
121 } 135 }
122#endif
123 136
124#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
125 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 147 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
126 {
127 *ttydev = strdup (ptsname (pfd));
128 return pfd;
129 }
130#endif
131
132#ifdef PTYS_ARE_NUMERIC
133 {
134 int idx;
135 char *c1, *c2;
136 char pty_name[] = "/dev/ptyp???";
137 char tty_name[] = "/dev/ttyp???";
138
139 c1 = &(pty_name[sizeof (pty_name) - 4]);
140 c2 = &(tty_name[sizeof (tty_name) - 4]);
141 for (idx = 0; idx < 256; idx++)
142 { 148 {
143 sprintf (c1, "%d", idx); 149 *ttydev = strdup (ttyname (pfd));
144 sprintf (c2, "%d", idx); 150 return pfd;
145 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)
146 { 191 {
147 idx = 256; 192 snprintf(pty_name, 32, "/dev/ptyp%d", i);
148 break; 193 snprintf(tty_name, 32, "/dev/ttyp%d", i);
194 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
195 continue;
149 } 196 }
150 197
151 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 198 if (access (tty_name, R_OK | W_OK) == 0)
152 { 199 {
153 if (access (tty_name, R_OK | W_OK) == 0)
154 {
155 *ttydev = strdup (tty_name); 200 *ttydev = strdup (tty_name);
156 return pfd; 201 return pfd;
157 }
158
159 close (pfd);
160 } 202 }
203
204 close (pfd);
161 } 205 }
162 }
163#endif
164 206
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
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; 207 return -1;
202} 208 }
209
210#endif
203 211
204/*----------------------------------------------------------------------*/ 212/*----------------------------------------------------------------------*/
205/* 213/*
206 * Returns tty file descriptor, or -1 on failure 214 * Returns tty file descriptor, or -1 on failure
207 */ 215 */
208static int 216static int
209get_tty (char *ttydev) 217get_tty (char *ttydev)
210{ 218{
211 return open (ttydev, O_RDWR | O_NOCTTY, 0); 219 return open (ttydev, O_RDWR | O_NOCTTY, 0);
… …
214/*----------------------------------------------------------------------*/ 222/*----------------------------------------------------------------------*/
215/* 223/*
216 * 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
217 */ 225 */
218static int 226static int
219control_tty (int fd_tty, const char *ttydev) 227control_tty (int fd_tty)
220{ 228{
221#ifndef __QNX__
222 int fd; 229 int fd;
223 230
224 /* ---------------------------------------- */
225# ifdef HAVE_SETSID
226 setsid (); 231 setsid ();
227# endif
228# if defined(HAVE_SETPGID)
229 setpgid (0, 0);
230# elif defined(HAVE_SETPGRP)
231 setpgrp (0, 0);
232# endif
233 232
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) 233#if defined(HAVE_DEV_PTMX) && defined(I_PUSH)
251 /* 234 /*
252 * Push STREAMS modules: 235 * Push STREAMS modules:
253 * ptem: pseudo-terminal hardware emulation module. 236 * ptem: pseudo-terminal hardware emulation module.
254 * ldterm: standard terminal line discipline. 237 * ldterm: standard terminal line discipline.
255 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 238 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
… …
272 ioctl (fd_tty, I_PUSH, "ptem"); 255 ioctl (fd_tty, I_PUSH, "ptem");
273 ioctl (fd_tty, I_PUSH, "ldterm"); 256 ioctl (fd_tty, I_PUSH, "ldterm");
274 ioctl (fd_tty, I_PUSH, "ttcompat"); 257 ioctl (fd_tty, I_PUSH, "ttcompat");
275 } 258 }
276#endif 259#endif
277 /* ---------------------------------------- */ 260
278# if defined(TIOCSCTTY) 261#ifdef TIOCSCTTY
279 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 262 ioctl (fd_tty, TIOCSCTTY, NULL);
280# elif defined(TIOCSETCTTY)
281 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
282# else 263#else
283 fd = open (ttydev, O_RDWR); 264 fd = open (ttyname (fd_tty), O_RDWR);
284 if (fd >= 0) 265 if (fd >= 0)
285 close (fd); 266 close (fd);
286# endif 267#endif
287 /* ---------------------------------------- */ 268
288 fd = open ("/dev/tty", O_WRONLY); 269 fd = open ("/dev/tty", O_WRONLY);
289 if (fd < 0) 270 if (fd < 0)
290 return -1; /* fatal */ 271 return -1; /* fatal */
272
291 close (fd); 273 close (fd);
292 /* ---------------------------------------- */
293#endif /* ! __QNX__ */
294 274
295 return 0; 275 return 0;
296} 276}
297 277
298#ifndef NO_SETOWNER_TTYDEV 278void
279ptytty::close_tty ()
280{
281 if (tty < 0)
282 return;
283
284 close (tty);
285 tty = -1;
286}
287
288bool
289ptytty::make_controlling_tty ()
290{
291 return control_tty (tty) >= 0;
292}
293
294void
295ptytty::set_utf8_mode (bool on)
296{
297#ifdef IUTF8
298 if (pty < 0)
299 return;
300
301 struct termios tio;
302
303 if (tcgetattr (pty, &tio) != -1)
304 {
305 tcflag_t new_cflag = tio.c_iflag;
306
307 if (on)
308 new_cflag |= IUTF8;
309 else
310 new_cflag &= ~IUTF8;
311
312 if (new_cflag != tio.c_iflag)
313 {
314 tio.c_iflag = new_cflag;
315 tcsetattr (pty, TCSANOW, &tio);
316 }
317 }
318#endif
319}
320
299static struct ttyconf { 321static struct ttyconf {
300 gid_t gid; 322 gid_t gid;
301 mode_t mode; 323 mode_t mode;
302 324
303 ttyconf () 325 ttyconf ()
304 { 326 {
305#ifdef TTY_GID_SUPPORT 327#ifdef TTY_GID_SUPPORT
306 struct group *gr = getgrnam ("tty"); 328 struct group *gr = getgrnam ("tty");
307 329
308 if (gr) 330 if (gr)
331 {
309 { /* change group ownership of tty to "tty" */ 332 /* change group ownership of tty to "tty" */
310 mode = S_IRUSR | S_IWUSR | S_IWGRP; 333 mode = S_IRUSR | S_IWUSR | S_IWGRP;
311 gid = gr->gr_gid; 334 gid = gr->gr_gid;
312 } 335 }
313 else 336 else
314#endif /* TTY_GID_SUPPORT */ 337#endif /* TTY_GID_SUPPORT */
315 { 338 {
316 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; 339 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
317 gid = getgid (); 340 gid = 0;
318 } 341 }
319 } 342 }
320} ttyconf; 343} ttyconf;
321 344
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}
360
322void 361void
323rxvt_ptytty::privileges (rxvt_privaction action) 362ptytty_unix::put ()
324{ 363{
325 if (!name || !*name) 364 if (name)
326 return;
327
328 rxvt_privileges (RESTORE);
329
330 if (action == SAVE)
331 { 365 {
332# ifndef RESET_TTY_TO_COMMON_DEFAULTS 366 chmod (name, RESTORE_TTY_MODE);
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 }
347 else
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); 367 chown (name, 0, ttyconf.gid);
358# endif
359
360 } 368 }
361 369
362 rxvt_privileges (IGNORE); 370 close_tty ();
363}
364#endif
365 371
366rxvt_ptytty::rxvt_ptytty () 372 if (pty >= 0)
367{ 373 close (pty);
374
375 free (name);
376
368 pty = tty = -1; 377 pty = tty = -1;
369 name = 0; 378 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} 379}
405 380
406bool 381bool
407rxvt_ptytty::make_controlling_tty () 382ptytty_unix::get ()
408{
409 return control_tty (tty, name) >= 0;
410}
411
412bool
413rxvt_ptytty::get ()
414{ 383{
415 /* get master (pty) */ 384 /* get master (pty) */
416 if ((pty = get_pty (&tty, &name)) < 0) 385 if ((pty = get_pty (&tty, &name)) < 0)
417 return false; 386 return false;
418 387
… …
420 389
421 /* get slave (tty) */ 390 /* get slave (tty) */
422 if (tty < 0) 391 if (tty < 0)
423 { 392 {
424#ifndef NO_SETOWNER_TTYDEV 393#ifndef NO_SETOWNER_TTYDEV
425 privileges (SAVE); 394 chown (name, getuid (), ttyconf.gid); /* fail silently */
395 chmod (name, ttyconf.mode);
396# ifdef HAVE_REVOKE
397 revoke (name);
398# endif
426#endif 399#endif
427 400
428 if ((tty = get_tty (name)) < 0) 401 if ((tty = get_tty (name)) < 0)
429 { 402 {
430 put (); 403 put ();
… …
433 } 406 }
434 407
435 return true; 408 return true;
436} 409}
437 410
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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