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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.25 by root, Sun Jan 1 05:08:41 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 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#ifdef HAVE_STDLIB_H
28# include <cstdlib> 32#include <cstdlib>
29#endif 33#include <cstring>
30#ifdef HAVE_SYS_TYPES_H 34#include <csignal>
35
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#if defined(HAVE_STRING_H)
37# include <cstring>
38#endif
39#ifdef HAVE_FCNTL_H
40# include <fcntl.h> 38#include <fcntl.h>
41#endif 39
42#ifdef HAVE_SYS_IOCTL_H 40#ifdef HAVE_SYS_IOCTL_H
43# include <sys/ioctl.h> 41# include <sys/ioctl.h>
44#endif 42#endif
45#if defined(PTYS_ARE_PTMX) && defined(HAVE_SYS_STROPTS_H) 43#if defined(HAVE_DEV_PTMX) && defined(HAVE_SYS_STROPTS_H)
46# include <sys/stropts.h> /* for I_PUSH */ 44# include <sys/stropts.h> /* for I_PUSH */
47#endif 45#endif
48#ifdef HAVE_ISASTREAM 46#ifdef HAVE_ISASTREAM
49# include <stropts.h> 47# include <stropts.h>
50#endif 48#endif
51#ifdef HAVE_PTY_H 49#if defined(HAVE_PTY_H)
52# include <pty.h> 50# include <pty.h>
53#endif 51#elif defined(HAVE_LIBUTIL_H)
54
55// better do this via configure, but....
56#if defined(__FreeBSD__)
57# include <libutil.h> 52# include <libutil.h>
58#elif defined(__DARWIN__) || (defined (__MACH__) && defined (__APPLE__)) 53#elif defined(HAVE_UTIL_H)
59# include <util.h> 54# include <util.h>
60#endif 55#endif
56#ifdef TTY_GID_SUPPORT
57#include <grp.h>
58#endif
61 59
62#include <cstdio> 60#include <cstdio>
63#include <grp.h> 61
62/////////////////////////////////////////////////////////////////////////////
64 63
65/* ------------------------------------------------------------------------- * 64/* ------------------------------------------------------------------------- *
66 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 65 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
67 * ------------------------------------------------------------------------- */ 66 * ------------------------------------------------------------------------- */
68/* 67/*
69 * Returns pty file descriptor, or -1 on failure 68 * Returns pty file descriptor, or -1 on failure
70 * 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.
71 * 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
72 */ 71 */
72#if defined(UNIX98_PTY)
73
73static int 74 static int
74get_pty (int *fd_tty, char **ttydev) 75 get_pty (int *fd_tty, char **ttydev)
75{ 76 {
76 int pfd; 77 int pfd;
77 78
78#ifdef PTYS_ARE_OPENPTY 79# if defined(HAVE_GETPT)
79 char tty_name[sizeof "/dev/pts/?????\0"];
80
81 rxvt_privileges (RESTORE);
82 int res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
83 rxvt_privileges (IGNORE);
84
85 if (res != -1)
86 {
87 *ttydev = strdup (tty_name);
88 return pfd;
89 }
90#endif
91
92#ifdef PTYS_ARE__GETPTY
93 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
94 if (*ttydev != NULL)
95 return pfd;
96#endif
97
98#ifdef PTYS_ARE_GETPTY
99
100 char *ptydev;
101
102 while ((ptydev = getpty ()) != NULL)
103 if ((pfd = open (ptydev, O_RDWR | O_NOCTTY, 0)) >= 0)
104 {
105 *ttydev = ptydev;
106 return pfd;
107 }
108#endif
109
110#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
111# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_PTMX)
112
113 {
114# ifdef PTYS_ARE_GETPT
115 pfd = getpt (); 80 pfd = getpt();
81# elif defined(HAVE_POSIX_OPENPT)
82 pfd = posix_openpt (O_RDWR);
116# else 83# else
117 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 84 pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0);
118# endif 85# endif
119 86
120 if (pfd >= 0) 87 if (pfd >= 0)
121 { 88 {
122 if (grantpt (pfd) == 0 /* change slave permissions */ 89 if (grantpt (pfd) == 0 /* change slave permissions */
123 && unlockpt (pfd) == 0) 90 && unlockpt (pfd) == 0)
91 {
124 { /* slave now unlocked */ 92 /* slave now unlocked */
125 *ttydev = strdup (ptsname (pfd)); /* get slave's name */ 93 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
126 return pfd; 94 return pfd;
127 } 95 }
96
128 close (pfd); 97 close (pfd);
129 } 98 }
130 }
131# endif
132#endif
133 99
134#ifdef PTYS_ARE_PTC 100 return -1;
135 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)
136 { 114 {
137 *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);
138 return pfd; 134 return pfd;
139 } 135 }
140#endif
141 136
142#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
143 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 147 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
144 {
145 *ttydev = strdup (ptsname (pfd));
146 return pfd;
147 }
148#endif
149
150#ifdef PTYS_ARE_NUMERIC
151 {
152 int idx;
153 char *c1, *c2;
154 char pty_name[] = "/dev/ptyp???";
155 char tty_name[] = "/dev/ttyp???";
156
157 c1 = &(pty_name[sizeof (pty_name) - 4]);
158 c2 = &(tty_name[sizeof (tty_name) - 4]);
159 for (idx = 0; idx < 256; idx++)
160 { 148 {
161 sprintf (c1, "%d", idx); 149 *ttydev = strdup (ttyname (pfd));
162 sprintf (c2, "%d", idx); 150 return pfd;
163 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)
164 { 191 {
165 idx = 256; 192 snprintf(pty_name, 32, "/dev/ptyp%d", i);
166 break; 193 snprintf(tty_name, 32, "/dev/ttyp%d", i);
194 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
195 continue;
167 } 196 }
168 197
169 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 198 if (access (tty_name, R_OK | W_OK) == 0)
170 { 199 {
171 if (access (tty_name, R_OK | W_OK) == 0)
172 {
173 *ttydev = strdup (tty_name); 200 *ttydev = strdup (tty_name);
174 return pfd; 201 return pfd;
175 }
176
177 close (pfd);
178 } 202 }
203
204 close (pfd);
179 } 205 }
180 }
181#endif
182 206
183#ifdef PTYS_ARE_SEARCHED
184 {
185 const char *c1, *c2;
186 char pty_name[] = "/dev/pty??";
187 char tty_name[] = "/dev/tty??";
188
189# ifndef PTYCHAR1
190# define PTYCHAR1 "pqrstuvwxyz"
191# endif
192# ifndef PTYCHAR2
193# define PTYCHAR2 "0123456789abcdef"
194# endif
195
196 for (c1 = PTYCHAR1; *c1; c1++)
197 {
198 pty_name[ (sizeof (pty_name) - 3)] =
199 tty_name[ (sizeof (pty_name) - 3)] = *c1;
200 for (c2 = PTYCHAR2; *c2; c2++)
201 {
202 pty_name[ (sizeof (pty_name) - 2)] =
203 tty_name[ (sizeof (pty_name) - 2)] = *c2;
204 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
205 {
206 if (access (tty_name, R_OK | W_OK) == 0)
207 {
208 *ttydev = strdup (tty_name);
209 return pfd;
210 }
211
212 close (pfd);
213 }
214 }
215 }
216 }
217#endif
218
219 return -1; 207 return -1;
220} 208 }
209
210#endif
221 211
222/*----------------------------------------------------------------------*/ 212/*----------------------------------------------------------------------*/
223/* 213/*
224 * Returns tty file descriptor, or -1 on failure 214 * Returns tty file descriptor, or -1 on failure
225 */ 215 */
226static int 216static int
227get_tty (char *ttydev) 217get_tty (char *ttydev)
228{ 218{
229 return open (ttydev, O_RDWR | O_NOCTTY, 0); 219 return open (ttydev, O_RDWR | O_NOCTTY, 0);
… …
232/*----------------------------------------------------------------------*/ 222/*----------------------------------------------------------------------*/
233/* 223/*
234 * 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
235 */ 225 */
236static int 226static int
237control_tty (int fd_tty, const char *ttydev) 227control_tty (int fd_tty)
238{ 228{
239#ifndef __QNX__
240 int fd; 229 int fd;
241 230
242 /* ---------------------------------------- */
243# ifdef HAVE_SETSID
244 setsid (); 231 setsid ();
245# endif
246# if defined(HAVE_SETPGID)
247 setpgid (0, 0);
248# elif defined(HAVE_SETPGRP)
249 setpgrp (0, 0);
250# endif
251 232
252 /* ---------------------------------------- */
253# ifdef TIOCNOTTY
254 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
255 if (fd >= 0)
256 {
257 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
258 close (fd);
259 }
260# endif
261
262 /* ---------------------------------------- */
263 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
264 if (fd >= 0)
265 close (fd); /* ouch: still have controlling tty */
266
267 /* ---------------------------------------- */
268#if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 233#if defined(HAVE_DEV_PTMX) && defined(I_PUSH)
269 /* 234 /*
270 * Push STREAMS modules: 235 * Push STREAMS modules:
271 * ptem: pseudo-terminal hardware emulation module. 236 * ptem: pseudo-terminal hardware emulation module.
272 * ldterm: standard terminal line discipline. 237 * ldterm: standard terminal line discipline.
273 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 238 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
… …
290 ioctl (fd_tty, I_PUSH, "ptem"); 255 ioctl (fd_tty, I_PUSH, "ptem");
291 ioctl (fd_tty, I_PUSH, "ldterm"); 256 ioctl (fd_tty, I_PUSH, "ldterm");
292 ioctl (fd_tty, I_PUSH, "ttcompat"); 257 ioctl (fd_tty, I_PUSH, "ttcompat");
293 } 258 }
294#endif 259#endif
295 /* ---------------------------------------- */ 260
296# if defined(TIOCSCTTY) 261#ifdef TIOCSCTTY
297 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 262 ioctl (fd_tty, TIOCSCTTY, NULL);
298# elif defined(TIOCSETCTTY)
299 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
300# else 263#else
301 fd = open (ttydev, O_RDWR); 264 fd = open (ttyname (fd_tty), O_RDWR);
302 if (fd >= 0) 265 if (fd >= 0)
303 close (fd); 266 close (fd);
304# endif 267#endif
305 /* ---------------------------------------- */ 268
306 fd = open ("/dev/tty", O_WRONLY); 269 fd = open ("/dev/tty", O_WRONLY);
307 if (fd < 0) 270 if (fd < 0)
308 return -1; /* fatal */ 271 return -1; /* fatal */
272
309 close (fd); 273 close (fd);
310 /* ---------------------------------------- */
311#endif /* ! __QNX__ */
312 274
313 return 0; 275 return 0;
314} 276}
315 277
316#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
317static struct ttyconf { 321static struct ttyconf {
318 gid_t gid; 322 gid_t gid;
319 mode_t mode; 323 mode_t mode;
320 324
321 ttyconf () 325 ttyconf ()
322 { 326 {
323#ifdef TTY_GID_SUPPORT 327#ifdef TTY_GID_SUPPORT
324 struct group *gr = getgrnam ("tty"); 328 struct group *gr = getgrnam ("tty");
325 329
326 if (gr) 330 if (gr)
331 {
327 { /* change group ownership of tty to "tty" */ 332 /* change group ownership of tty to "tty" */
328 mode = S_IRUSR | S_IWUSR | S_IWGRP; 333 mode = S_IRUSR | S_IWUSR | S_IWGRP;
329 gid = gr->gr_gid; 334 gid = gr->gr_gid;
330 } 335 }
331 else 336 else
332#endif /* TTY_GID_SUPPORT */ 337#endif /* TTY_GID_SUPPORT */
333 { 338 {
334 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; 339 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
335 gid = getgid (); 340 gid = 0;
336 } 341 }
337 } 342 }
338} ttyconf; 343} ttyconf;
339 344
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
340void 361void
341rxvt_ptytty::privileges (rxvt_privaction action) 362ptytty_unix::put ()
342{ 363{
343 if (pty < 0) 364 if (name)
344 return;
345
346 rxvt_privileges (RESTORE);
347
348 if (action == SAVE)
349 { 365 {
350 //next_tty_action = RESTORE; 366 chmod (name, RESTORE_TTY_MODE);
351# ifndef RESET_TTY_TO_COMMON_DEFAULTS
352 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
353 if (lstat (name, &savestat) < 0) /* you lose out */
354 ;//next_tty_action = IGNORE;
355 else
356# endif
357 {
358 chown (name, getuid (), ttyconf.gid); /* fail silently */
359 chmod (name, ttyconf.mode);
360# ifdef HAVE_REVOKE
361 revoke (name);
362# endif
363 }
364 }
365 else
366 { /* action == RESTORE */
367 //next_tty_action = IGNORE;
368# ifndef RESET_TTY_TO_COMMON_DEFAULTS
369 chmod (name, savestat.st_mode);
370 chown (name, savestat.st_uid, savestat.st_gid);
371# else
372 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
373 chown (name, 0, 0); 367 chown (name, 0, ttyconf.gid);
374# endif
375
376 } 368 }
377 369
378 rxvt_privileges (IGNORE); 370 close_tty ();
379}
380#endif
381 371
382rxvt_ptytty::rxvt_ptytty () 372 if (pty >= 0)
383{ 373 close (pty);
374
375 free (name);
376
384 pty = tty = -1; 377 pty = tty = -1;
385 name = 0; 378 name = 0;
386} 379}
387 380
388rxvt_ptytty::~rxvt_ptytty ()
389{
390 put ();
391}
392
393void
394
395rxvt_ptytty::close_tty ()
396{
397 if (tty >= 0) close (tty);
398 tty = -1;
399}
400
401void
402rxvt_ptytty::put ()
403{
404#ifndef NO_SETOWNER_TTYDEV
405 if (tty >= 0)
406 privileges (RESTORE);
407#endif
408
409 if (pty >= 0) close (pty);
410 close_tty ();
411 free (name);
412
413 pty = tty = -1;
414 name = 0;
415}
416
417bool 381bool
418rxvt_ptytty::make_controlling_tty () 382ptytty_unix::get ()
419{
420 return control_tty (tty, name) >= 0;
421}
422
423bool
424rxvt_ptytty::get ()
425{ 383{
426 /* get master (pty) */ 384 /* get master (pty) */
427 if ((pty = get_pty (&tty, &name)) < 0) 385 if ((pty = get_pty (&tty, &name)) < 0)
428 return false; 386 return false;
429 387
… …
431 389
432 /* get slave (tty) */ 390 /* get slave (tty) */
433 if (tty < 0) 391 if (tty < 0)
434 { 392 {
435#ifndef NO_SETOWNER_TTYDEV 393#ifndef NO_SETOWNER_TTYDEV
436 privileges (SAVE); 394 chown (name, getuid (), ttyconf.gid); /* fail silently */
395 chmod (name, ttyconf.mode);
396# ifdef HAVE_REVOKE
397 revoke (name);
398# endif
437#endif 399#endif
438 400
439 if ((tty = get_tty (name)) < 0) 401 if ((tty = get_tty (name)) < 0)
440 { 402 {
441 put (); 403 put ();
… …
444 } 406 }
445 407
446 return true; 408 return true;
447} 409}
448 410
449void
450rxvt_ptytty::set_utf8_mode (bool on)
451{
452#ifdef IUTF8
453 if (pty != -1)
454 {
455 struct termios tio;
456
457 if (tcgetattr (pty, &tio) != -1)
458 {
459 tcflag_t new_cflag = tio.c_iflag;
460
461 if (on)
462 new_cflag |= IUTF8;
463 else
464 new_cflag &= ~IUTF8;
465
466 if (new_cflag != tio.c_iflag)
467 {
468 tio.c_iflag = new_cflag;
469 tcsetattr (pty, TCSANOW, &tio);
470 }
471 }
472 }
473#endif
474}
475
476/*----------------------- end-of-file (C source) -----------------------*/
477

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