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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.30 by root, Fri Jan 6 05:37:59 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#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 37#include <sys/stat.h>
33#ifdef HAVE_UNISTD_H
34# include <unistd.h> 38#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> 39#include <fcntl.h>
41#endif 40
42#ifdef HAVE_SYS_IOCTL_H 41#ifdef HAVE_SYS_IOCTL_H
43# include <sys/ioctl.h> 42# include <sys/ioctl.h>
44#endif 43#endif
45#if defined(PTYS_ARE_PTMX) && defined(HAVE_SYS_STROPTS_H) 44#if defined(HAVE_DEV_PTMX) && defined(HAVE_SYS_STROPTS_H)
46# include <sys/stropts.h> /* for I_PUSH */ 45# include <sys/stropts.h> /* for I_PUSH */
47#endif 46#endif
48#ifdef HAVE_ISASTREAM 47#if defined(HAVE_ISASTREAM) && defined(HAVE_STROPTS_H)
49# include <stropts.h> 48# include <stropts.h>
50#endif 49#endif
51#ifdef HAVE_PTY_H 50#if defined(HAVE_PTY_H)
52# include <pty.h> 51# include <pty.h>
53#endif 52#elif defined(HAVE_LIBUTIL_H)
54
55// better do this via configure, but....
56#if defined(__FreeBSD__)
57# include <libutil.h> 53# include <libutil.h>
58#elif defined(__DARWIN__) || (defined (__MACH__) && defined (__APPLE__)) 54#elif defined(HAVE_UTIL_H)
59# include <util.h> 55# include <util.h>
60#endif 56#endif
57#ifdef TTY_GID_SUPPORT
58#include <grp.h>
59#endif
61 60
62#include <cstdio> 61#include <cstdio>
63#include <grp.h> 62
63/////////////////////////////////////////////////////////////////////////////
64 64
65/* ------------------------------------------------------------------------- * 65/* ------------------------------------------------------------------------- *
66 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 66 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
67 * ------------------------------------------------------------------------- */ 67 * ------------------------------------------------------------------------- */
68/* 68/*
69 * Returns pty file descriptor, or -1 on failure 69 * Returns pty file descriptor, or -1 on failure
70 * 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.
71 * 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
72 */ 72 */
73#if defined(UNIX98_PTY)
74
73static int 75 static int
74get_pty (int *fd_tty, char **ttydev) 76 get_pty (int *fd_tty, char **ttydev)
75{
76 int pfd;
77
78#ifdef PTYS_ARE_OPENPTY
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 char *ptydev;
100
101 while ((ptydev = getpty ()) != NULL)
102 if ((pfd = open (ptydev, O_RDWR | O_NOCTTY, 0)) >= 0)
103 {
104 *ttydev = ptydev;
105 return pfd;
106 }
107#endif
108
109#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
110# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_PTMX)
111
112 { 77 {
113# ifdef PTYS_ARE_GETPT 78 int pfd;
79
80# if defined(HAVE_GETPT)
114 pfd = getpt (); 81 pfd = getpt();
82# elif defined(HAVE_POSIX_OPENPT)
83 pfd = posix_openpt (O_RDWR);
115# else 84# else
116 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 85 pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0);
117# endif 86# endif
118 87
119 if (pfd >= 0) 88 if (pfd >= 0)
120 { 89 {
121 if (grantpt (pfd) == 0 /* change slave permissions */ 90 if (grantpt (pfd) == 0 /* change slave permissions */
122 && unlockpt (pfd) == 0) 91 && unlockpt (pfd) == 0)
92 {
123 { /* slave now unlocked */ 93 /* slave now unlocked */
124 *ttydev = strdup (ptsname (pfd)); /* get slave's name */ 94 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
125 return pfd; 95 return pfd;
126 } 96 }
97
127 close (pfd); 98 close (pfd);
128 } 99 }
100
101 return -1;
129 } 102 }
130# endif
131#endif
132 103
133#ifdef PTYS_ARE_PTC 104#elif defined(HAVE_OPENPTY)
134 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
135 {
136 *ttydev = strdup (ttyname (pfd));
137 return pfd;
138 }
139#endif
140 105
141#ifdef PTYS_ARE_CLONE 106 static int
142 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 107 get_pty (int *fd_tty, char **ttydev)
143 {
144 *ttydev = strdup (ptsname (pfd));
145 return pfd;
146 }
147#endif
148
149#ifdef PTYS_ARE_NUMERIC
150 { 108 {
151 int idx; 109 int pfd;
152 char *c1, *c2; 110 int res;
153 char pty_name[] = "/dev/ptyp???";
154 char tty_name[] = "/dev/ttyp???";
155 111
156 c1 = &(pty_name[sizeof (pty_name) - 4]); 112 res = openpty (&pfd, fd_tty, NULL, NULL, NULL);
157 c2 = &(tty_name[sizeof (tty_name) - 4]); 113
158 for (idx = 0; idx < 256; idx++) 114 if (res != -1)
159 { 115 {
160 sprintf (c1, "%d", idx); 116 *ttydev = strdup (ttyname (*fd_tty));
161 sprintf (c2, "%d", idx); 117 return pfd;
162 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)
163 { 161 {
164 idx = 256; 162 snprintf(pty_name, 32, "/dev/ptyp%d", i);
165 break; 163 snprintf(tty_name, 32, "/dev/ttyp%d", i);
164 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
165 continue;
166 } 166 }
167 167
168 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 168 if (access (tty_name, R_OK | W_OK) == 0)
169 { 169 {
170 if (access (tty_name, R_OK | W_OK) == 0)
171 {
172 *ttydev = strdup (tty_name); 170 *ttydev = strdup (tty_name);
173 return pfd; 171 return pfd;
174 }
175
176 close (pfd);
177 } 172 }
173
174 close (pfd);
178 } 175 }
176
177 return -1;
179 } 178 }
180#endif
181 179
182#ifdef PTYS_ARE_SEARCHED
183 {
184 const char *c1, *c2;
185 char pty_name[] = "/dev/pty??";
186 char tty_name[] = "/dev/tty??";
187
188# ifndef PTYCHAR1
189# define PTYCHAR1 "pqrstuvwxyz"
190# endif 180#endif
191# ifndef PTYCHAR2
192# define PTYCHAR2 "0123456789abcdef"
193# endif
194
195 for (c1 = PTYCHAR1; *c1; c1++)
196 {
197 pty_name[ (sizeof (pty_name) - 3)] =
198 tty_name[ (sizeof (pty_name) - 3)] = *c1;
199 for (c2 = PTYCHAR2; *c2; c2++)
200 {
201 pty_name[ (sizeof (pty_name) - 2)] =
202 tty_name[ (sizeof (pty_name) - 2)] = *c2;
203 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
204 {
205 if (access (tty_name, R_OK | W_OK) == 0)
206 {
207 *ttydev = strdup (tty_name);
208 return pfd;
209 }
210
211 close (pfd);
212 }
213 }
214 }
215 }
216#endif
217
218 return -1;
219}
220 181
221/*----------------------------------------------------------------------*/ 182/*----------------------------------------------------------------------*/
222/* 183/*
223 * Returns tty file descriptor, or -1 on failure 184 * Returns tty file descriptor, or -1 on failure
224 */ 185 */
225static int 186static int
226get_tty (char *ttydev) 187get_tty (char *ttydev)
227{ 188{
228 return open (ttydev, O_RDWR | O_NOCTTY, 0); 189 return open (ttydev, O_RDWR | O_NOCTTY, 0);
… …
231/*----------------------------------------------------------------------*/ 192/*----------------------------------------------------------------------*/
232/* 193/*
233 * 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
234 */ 195 */
235static int 196static int
236control_tty (int fd_tty, const char *ttydev) 197control_tty (int fd_tty)
237{ 198{
238#ifndef __QNX__
239 int fd; 199 int fd;
240 200
241 /* ---------------------------------------- */
242# ifdef HAVE_SETSID
243 setsid (); 201 setsid ();
244# endif
245# if defined(HAVE_SETPGID)
246 setpgid (0, 0);
247# elif defined(HAVE_SETPGRP)
248 setpgrp (0, 0);
249# endif
250 202
251 /* ---------------------------------------- */
252# ifdef TIOCNOTTY
253 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
254 if (fd >= 0)
255 {
256 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
257 close (fd);
258 }
259# endif
260
261 /* ---------------------------------------- */
262 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
263 if (fd >= 0)
264 close (fd); /* ouch: still have controlling tty */
265
266 /* ---------------------------------------- */
267#if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 203#if defined(HAVE_DEV_PTMX) && defined(I_PUSH)
268 /* 204 /*
269 * Push STREAMS modules: 205 * Push STREAMS modules:
270 * ptem: pseudo-terminal hardware emulation module. 206 * ptem: pseudo-terminal hardware emulation module.
271 * ldterm: standard terminal line discipline. 207 * ldterm: standard terminal line discipline.
272 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 208 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
… …
280 * documentation is really unclear about whether it is any close () on 216 * documentation is really unclear about whether it is any close () on
281 * 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
282 * 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
283 * through - Geoff Wing 219 * through - Geoff Wing
284 */ 220 */
285# ifdef HAVE_ISASTREAM 221#if defined(HAVE_ISASTREAM) && defined(HAVE_STROPTS_H)
286 if (isastream (fd_tty) == 1) 222 if (isastream (fd_tty) == 1)
287# endif 223# endif
288 { 224 {
289 ioctl (fd_tty, I_PUSH, "ptem"); 225 ioctl (fd_tty, I_PUSH, "ptem");
290 ioctl (fd_tty, I_PUSH, "ldterm"); 226 ioctl (fd_tty, I_PUSH, "ldterm");
291 ioctl (fd_tty, I_PUSH, "ttcompat"); 227 ioctl (fd_tty, I_PUSH, "ttcompat");
292 } 228 }
293#endif 229#endif
294 /* ---------------------------------------- */ 230
295# if defined(TIOCSCTTY) 231#ifdef TIOCSCTTY
296 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 232 ioctl (fd_tty, TIOCSCTTY, NULL);
297# elif defined(TIOCSETCTTY)
298 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
299# else 233#else
300 fd = open (ttydev, O_RDWR); 234 fd = open (ttyname (fd_tty), O_RDWR);
301 if (fd >= 0) 235 if (fd >= 0)
302 close (fd); 236 close (fd);
303# endif 237#endif
304 /* ---------------------------------------- */ 238
305 fd = open ("/dev/tty", O_WRONLY); 239 fd = open ("/dev/tty", O_WRONLY);
306 if (fd < 0) 240 if (fd < 0)
307 return -1; /* fatal */ 241 return -1; /* fatal */
242
308 close (fd); 243 close (fd);
309 /* ---------------------------------------- */
310#endif /* ! __QNX__ */
311 244
312 return 0; 245 return 0;
313} 246}
314 247
315#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
316static struct ttyconf { 291static struct ttyconf {
317 gid_t gid; 292 gid_t gid;
318 mode_t mode; 293 mode_t mode;
319 294
320 ttyconf () 295 ttyconf ()
321 { 296 {
322#ifdef TTY_GID_SUPPORT 297#ifdef TTY_GID_SUPPORT
323 struct group *gr = getgrnam ("tty"); 298 struct group *gr = getgrnam ("tty");
324 299
325 if (gr) 300 if (gr)
301 {
326 { /* change group ownership of tty to "tty" */ 302 /* change group ownership of tty to "tty" */
327 mode = S_IRUSR | S_IWUSR | S_IWGRP; 303 mode = S_IRUSR | S_IWUSR | S_IWGRP;
328 gid = gr->gr_gid; 304 gid = gr->gr_gid;
329 } 305 }
330 else 306 else
331#endif /* TTY_GID_SUPPORT */ 307#endif /* TTY_GID_SUPPORT */
332 { 308 {
333 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; 309 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
334 gid = getgid (); 310 gid = 0;
335 } 311 }
336 } 312 }
337} ttyconf; 313} ttyconf;
338 314
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
339void 331void
340rxvt_ptytty::privileges (rxvt_privaction action) 332ptytty_unix::put ()
341{ 333{
342 if (!name || !*name) 334 if (name)
343 return;
344
345 rxvt_privileges (RESTORE);
346
347 if (action == SAVE)
348 {
349# ifndef RESET_TTY_TO_COMMON_DEFAULTS
350 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
351 if (lstat (name, &savestat) < 0) /* you lose out */
352 ;
353 else
354# endif
355 {
356 saved = true;
357 chown (name, getuid (), ttyconf.gid); /* fail silently */
358 chmod (name, ttyconf.mode);
359# ifdef HAVE_REVOKE
360 revoke (name);
361# endif
362 }
363 } 335 {
364 else 336 chmod (name, RESTORE_TTY_MODE);
365 { /* action == RESTORE */
366# ifndef RESET_TTY_TO_COMMON_DEFAULTS
367 if (saved)
368 {
369 chmod (name, savestat.st_mode);
370 chown (name, savestat.st_uid, savestat.st_gid);
371 }
372# else
373 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
374 chown (name, 0, 0); 337 chown (name, 0, ttyconf.gid);
375# endif
376
377 } 338 }
378 339
379 rxvt_privileges (IGNORE); 340 close_tty ();
380}
381#endif
382 341
383rxvt_ptytty::rxvt_ptytty () 342 if (pty >= 0)
384{ 343 close (pty);
344
345 free (name);
346
385 pty = tty = -1; 347 pty = tty = -1;
386 name = 0; 348 name = 0;
387#ifndef NO_SETOWNER_TTYDEV
388 saved = false;
389#endif
390}
391
392rxvt_ptytty::~rxvt_ptytty ()
393{
394 put ();
395}
396
397void
398
399rxvt_ptytty::close_tty ()
400{
401 if (tty < 0)
402 return;
403
404 close (tty);
405 tty = -1;
406}
407
408void
409rxvt_ptytty::put ()
410{
411#ifndef NO_SETOWNER_TTYDEV
412 privileges (RESTORE);
413#endif
414
415 if (pty >= 0) close (pty);
416 close_tty ();
417 free (name);
418
419 pty = tty = -1;
420 name = 0;
421} 349}
422 350
423bool 351bool
424rxvt_ptytty::make_controlling_tty () 352ptytty_unix::get ()
425{
426 return control_tty (tty, name) >= 0;
427}
428
429bool
430rxvt_ptytty::get ()
431{ 353{
432 /* get master (pty) */ 354 /* get master (pty) */
433 if ((pty = get_pty (&tty, &name)) < 0) 355 if ((pty = get_pty (&tty, &name)) < 0)
434 return false; 356 return false;
435 357
… …
437 359
438 /* get slave (tty) */ 360 /* get slave (tty) */
439 if (tty < 0) 361 if (tty < 0)
440 { 362 {
441#ifndef NO_SETOWNER_TTYDEV 363#ifndef NO_SETOWNER_TTYDEV
442 privileges (SAVE); 364 chown (name, getuid (), ttyconf.gid); /* fail silently */
365 chmod (name, ttyconf.mode);
366# ifdef HAVE_REVOKE
367 revoke (name);
368# endif
443#endif 369#endif
444 370
445 if ((tty = get_tty (name)) < 0) 371 if ((tty = get_tty (name)) < 0)
446 { 372 {
447 put (); 373 put ();
… …
450 } 376 }
451 377
452 return true; 378 return true;
453} 379}
454 380
455void
456rxvt_ptytty::set_utf8_mode (bool on)
457{
458#ifdef IUTF8
459 if (pty < 0)
460 return;
461
462 struct termios tio;
463
464 if (tcgetattr (pty, &tio) != -1)
465 {
466 tcflag_t new_cflag = tio.c_iflag;
467
468 if (on)
469 new_cflag |= IUTF8;
470 else
471 new_cflag &= ~IUTF8;
472
473 if (new_cflag != tio.c_iflag)
474 {
475 tio.c_iflag = new_cflag;
476 tcsetattr (pty, TCSANOW, &tio);
477 }
478 }
479#endif
480}
481
482/*----------------------- end-of-file (C source) -----------------------*/
483

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