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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.35 by root, Tue Jan 17 10:19:13 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_POSIX) || defined(PTYS_ARE_PTMX)
94
95 {
96# ifdef PTYS_ARE_GETPT
97 pfd = getpt(); 80 pfd = getpt();
98# else 81# elif defined(HAVE_POSIX_OPENPT)
99# ifdef PTYS_ARE_POSIX
100 pfd = posix_openpt (O_RDWR); 82 pfd = posix_openpt (O_RDWR);
101# else 83# else
102 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 84 pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0);
103# endif 85# endif
104# endif
105 86
106 if (pfd >= 0) 87 if (pfd >= 0)
107 { 88 {
108 if (grantpt (pfd) == 0 /* change slave permissions */ 89 if (grantpt (pfd) == 0 /* change slave permissions */
109 && unlockpt (pfd) == 0) 90 && unlockpt (pfd) == 0)
91 {
110 { /* slave now unlocked */ 92 /* slave now unlocked */
111 *ttydev = strdup (ptsname (pfd)); /* get slave's name */ 93 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
112 return pfd; 94 return pfd;
113 } 95 }
96
114 close (pfd); 97 close (pfd);
115 } 98 }
116 }
117# endif
118#endif
119 99
120#ifdef PTYS_ARE_PTC 100 return -1;
121 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)
122 { 114 {
123 *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);
124 return pfd; 134 return pfd;
125 } 135 }
126#endif
127 136
128#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
129 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 147 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
130 {
131 *ttydev = strdup (ptsname (pfd));
132 return pfd;
133 }
134#endif
135
136#ifdef PTYS_ARE_NUMERIC
137 {
138 int idx;
139 char *c1, *c2;
140 char pty_name[] = "/dev/ptyp???";
141 char tty_name[] = "/dev/ttyp???";
142
143 c1 = &(pty_name[sizeof (pty_name) - 4]);
144 c2 = &(tty_name[sizeof (tty_name) - 4]);
145 for (idx = 0; idx < 256; idx++)
146 { 148 {
147 sprintf (c1, "%d", idx); 149 *ttydev = strdup (ttyname (pfd));
148 sprintf (c2, "%d", idx); 150 return pfd;
149 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)
150 { 191 {
151 idx = 256; 192 snprintf(pty_name, 32, "/dev/ptyp%d", i);
152 break; 193 snprintf(tty_name, 32, "/dev/ttyp%d", i);
194 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
195 continue;
153 } 196 }
154 197
155 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 198 if (access (tty_name, R_OK | W_OK) == 0)
156 { 199 {
157 if (access (tty_name, R_OK | W_OK) == 0)
158 {
159 *ttydev = strdup (tty_name); 200 *ttydev = strdup (tty_name);
160 return pfd; 201 return pfd;
161 }
162
163 close (pfd);
164 } 202 }
203
204 close (pfd);
165 } 205 }
166 }
167#endif
168 206
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
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; 207 return -1;
206} 208 }
209
210#endif
207 211
208/*----------------------------------------------------------------------*/ 212/*----------------------------------------------------------------------*/
209/* 213/*
210 * Returns tty file descriptor, or -1 on failure 214 * Returns tty file descriptor, or -1 on failure
211 */ 215 */
212static int 216static int
213get_tty (char *ttydev) 217get_tty (char *ttydev)
214{ 218{
215 return open (ttydev, O_RDWR | O_NOCTTY, 0); 219 return open (ttydev, O_RDWR | O_NOCTTY, 0);
… …
218/*----------------------------------------------------------------------*/ 222/*----------------------------------------------------------------------*/
219/* 223/*
220 * 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
221 */ 225 */
222static int 226static int
223control_tty (int fd_tty, const char *ttydev) 227control_tty (int fd_tty)
224{ 228{
225#ifndef __QNX__
226 int fd; 229 int fd;
227 230
228 /* ---------------------------------------- */
229# ifdef HAVE_SETSID
230 setsid (); 231 setsid ();
231# endif
232# if defined(HAVE_SETPGID)
233 setpgid (0, 0);
234# elif defined(HAVE_SETPGRP)
235 setpgrp (0, 0);
236# endif
237 232
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) 233#if defined(HAVE_DEV_PTMX) && defined(I_PUSH)
255 /* 234 /*
256 * Push STREAMS modules: 235 * Push STREAMS modules:
257 * ptem: pseudo-terminal hardware emulation module. 236 * ptem: pseudo-terminal hardware emulation module.
258 * ldterm: standard terminal line discipline. 237 * ldterm: standard terminal line discipline.
259 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 238 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
… …
276 ioctl (fd_tty, I_PUSH, "ptem"); 255 ioctl (fd_tty, I_PUSH, "ptem");
277 ioctl (fd_tty, I_PUSH, "ldterm"); 256 ioctl (fd_tty, I_PUSH, "ldterm");
278 ioctl (fd_tty, I_PUSH, "ttcompat"); 257 ioctl (fd_tty, I_PUSH, "ttcompat");
279 } 258 }
280#endif 259#endif
281 /* ---------------------------------------- */ 260
282# if defined(TIOCSCTTY) 261#ifdef TIOCSCTTY
283 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 262 ioctl (fd_tty, TIOCSCTTY, NULL);
284# elif defined(TIOCSETCTTY)
285 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
286# else 263#else
287 fd = open (ttydev, O_RDWR); 264 fd = open (ttyname (fd_tty), O_RDWR);
288 if (fd >= 0) 265 if (fd >= 0)
289 close (fd); 266 close (fd);
290# endif 267#endif
291 /* ---------------------------------------- */ 268
292 fd = open ("/dev/tty", O_WRONLY); 269 fd = open ("/dev/tty", O_WRONLY);
293 if (fd < 0) 270 if (fd < 0)
294 return -1; /* fatal */ 271 return -1; /* fatal */
272
295 close (fd); 273 close (fd);
296 /* ---------------------------------------- */
297#endif /* ! __QNX__ */
298 274
299 return 0; 275 return 0;
300} 276}
301 277
302#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
303static struct ttyconf { 321static struct ttyconf {
304 gid_t gid; 322 gid_t gid;
305 mode_t mode; 323 mode_t mode;
306 324
307 ttyconf () 325 ttyconf ()
308 { 326 {
309#ifdef TTY_GID_SUPPORT 327#ifdef TTY_GID_SUPPORT
310 struct group *gr = getgrnam ("tty"); 328 struct group *gr = getgrnam ("tty");
311 329
312 if (gr) 330 if (gr)
331 {
313 { /* change group ownership of tty to "tty" */ 332 /* change group ownership of tty to "tty" */
314 mode = S_IRUSR | S_IWUSR | S_IWGRP; 333 mode = S_IRUSR | S_IWUSR | S_IWGRP;
315 gid = gr->gr_gid; 334 gid = gr->gr_gid;
316 } 335 }
317 else 336 else
318#endif /* TTY_GID_SUPPORT */ 337#endif /* TTY_GID_SUPPORT */
319 { 338 {
320 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; 339 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
321 gid = getgid (); 340 gid = 0;
322 } 341 }
323 } 342 }
324} ttyconf; 343} ttyconf;
325 344
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
326void 361void
327rxvt_ptytty::privileges (rxvt_privaction action) 362ptytty_unix::put ()
328{ 363{
329 if (!name || !*name) 364 if (name)
330 return;
331
332 rxvt_privileges (RESTORE);
333
334 if (action == SAVE)
335 { 365 {
336# ifndef RESET_TTY_TO_COMMON_DEFAULTS 366 chmod (name, RESTORE_TTY_MODE);
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 }
351 else
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); 367 chown (name, 0, ttyconf.gid);
362# endif
363
364 } 368 }
365 369
366 rxvt_privileges (IGNORE); 370 close_tty ();
367}
368#endif
369 371
370rxvt_ptytty::rxvt_ptytty () 372 if (pty >= 0)
371{ 373 close (pty);
374
375 free (name);
376
372 pty = tty = -1; 377 pty = tty = -1;
373 name = 0; 378 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} 379}
413 380
414bool 381bool
415rxvt_ptytty::make_controlling_tty () 382ptytty_unix::get ()
416{
417 return control_tty (tty, name) >= 0;
418}
419
420bool
421rxvt_ptytty::get ()
422{ 383{
423 /* get master (pty) */ 384 /* get master (pty) */
424 if ((pty = get_pty (&tty, &name)) < 0) 385 if ((pty = get_pty (&tty, &name)) < 0)
425 return false; 386 return false;
426 387
… …
428 389
429 /* get slave (tty) */ 390 /* get slave (tty) */
430 if (tty < 0) 391 if (tty < 0)
431 { 392 {
432#ifndef NO_SETOWNER_TTYDEV 393#ifndef NO_SETOWNER_TTYDEV
433 privileges (SAVE); 394 chown (name, getuid (), ttyconf.gid); /* fail silently */
395 chmod (name, ttyconf.mode);
396# ifdef HAVE_REVOKE
397 revoke (name);
398# endif
434#endif 399#endif
435 400
436 if ((tty = get_tty (name)) < 0) 401 if ((tty = get_tty (name)) < 0)
437 { 402 {
438 put (); 403 put ();
… …
441 } 406 }
442 407
443 return true; 408 return true;
444} 409}
445 410
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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