ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/rxvt-unicode/src/ptytty.C
(Generate patch)

Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.22 by root, Tue Jan 11 04:44:57 2005 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 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 if (openpty (&pfd, fd_tty, tty_name, NULL, NULL) != -1)
82 {
83 *ttydev = strdup (tty_name);
84 return pfd;
85 }
86#endif
87
88#ifdef PTYS_ARE__GETPTY
89 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
90 if (*ttydev != NULL)
91 return pfd;
92#endif
93
94#ifdef PTYS_ARE_GETPTY
95
96 char *ptydev;
97
98 while ((ptydev = getpty ()) != NULL)
99 if ((pfd = open (ptydev, O_RDWR | O_NOCTTY, 0)) >= 0)
100 {
101 *ttydev = ptydev;
102 return pfd;
103 }
104#endif
105
106#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
107# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_PTMX)
108
109 { 77 {
110# ifdef PTYS_ARE_GETPT 78 int pfd;
79
80# if defined(HAVE_GETPT)
111 pfd = getpt (); 81 pfd = getpt();
82# elif defined(HAVE_POSIX_OPENPT)
83 pfd = posix_openpt (O_RDWR);
112# else 84# else
113 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 85 pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0);
114# endif 86# endif
115 87
116 if (pfd >= 0) 88 if (pfd >= 0)
117 { 89 {
118 if (grantpt (pfd) == 0 /* change slave permissions */ 90 if (grantpt (pfd) == 0 /* change slave permissions */
119 && unlockpt (pfd) == 0) 91 && unlockpt (pfd) == 0)
92 {
120 { /* slave now unlocked */ 93 /* slave now unlocked */
121 *ttydev = strdup (ptsname (pfd)); /* get slave's name */ 94 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
122 return pfd; 95 return pfd;
123 } 96 }
97
124 close (pfd); 98 close (pfd);
125 } 99 }
100
101 return -1;
126 } 102 }
127# endif
128#endif
129 103
130#ifdef PTYS_ARE_PTC 104#elif defined(HAVE_OPENPTY)
131 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
132 {
133 *ttydev = strdup (ttyname (pfd));
134 return pfd;
135 }
136#endif
137 105
138#ifdef PTYS_ARE_CLONE 106 static int
139 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 107 get_pty (int *fd_tty, char **ttydev)
140 {
141 *ttydev = strdup (ptsname (pfd));
142 return pfd;
143 }
144#endif
145
146#ifdef PTYS_ARE_NUMERIC
147 { 108 {
148 int idx; 109 int pfd;
149 char *c1, *c2; 110 int res;
150 char pty_name[] = "/dev/ptyp???";
151 char tty_name[] = "/dev/ttyp???";
152 111
153 c1 = &(pty_name[sizeof (pty_name) - 4]); 112 res = openpty (&pfd, fd_tty, NULL, NULL, NULL);
154 c2 = &(tty_name[sizeof (tty_name) - 4]); 113
155 for (idx = 0; idx < 256; idx++) 114 if (res != -1)
156 { 115 {
157 sprintf (c1, "%d", idx); 116 *ttydev = strdup (ttyname (*fd_tty));
158 sprintf (c2, "%d", idx); 117 return pfd;
159 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)
160 { 161 {
161 idx = 256; 162 snprintf(pty_name, 32, "/dev/ptyp%d", i);
162 break; 163 snprintf(tty_name, 32, "/dev/ttyp%d", i);
164 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
165 continue;
163 } 166 }
164 167
165 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 168 if (access (tty_name, R_OK | W_OK) == 0)
166 { 169 {
167 if (access (tty_name, R_OK | W_OK) == 0)
168 {
169 *ttydev = strdup (tty_name); 170 *ttydev = strdup (tty_name);
170 return pfd; 171 return pfd;
171 }
172
173 close (pfd);
174 } 172 }
173
174 close (pfd);
175 } 175 }
176
177 return -1;
176 } 178 }
177#endif
178 179
179#ifdef PTYS_ARE_SEARCHED
180 {
181 const char *c1, *c2;
182 char pty_name[] = "/dev/pty??";
183 char tty_name[] = "/dev/tty??";
184
185# ifndef PTYCHAR1
186# define PTYCHAR1 "pqrstuvwxyz"
187# endif 180#endif
188# ifndef PTYCHAR2
189# define PTYCHAR2 "0123456789abcdef"
190# endif
191
192 for (c1 = PTYCHAR1; *c1; c1++)
193 {
194 pty_name[ (sizeof (pty_name) - 3)] =
195 tty_name[ (sizeof (pty_name) - 3)] = *c1;
196 for (c2 = PTYCHAR2; *c2; c2++)
197 {
198 pty_name[ (sizeof (pty_name) - 2)] =
199 tty_name[ (sizeof (pty_name) - 2)] = *c2;
200 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
201 {
202 if (access (tty_name, R_OK | W_OK) == 0)
203 {
204 *ttydev = strdup (tty_name);
205 return pfd;
206 }
207
208 close (pfd);
209 }
210 }
211 }
212 }
213#endif
214
215 return -1;
216}
217 181
218/*----------------------------------------------------------------------*/ 182/*----------------------------------------------------------------------*/
219/* 183/*
220 * Returns tty file descriptor, or -1 on failure 184 * Returns tty file descriptor, or -1 on failure
221 */ 185 */
222static int 186static int
223get_tty (char *ttydev) 187get_tty (char *ttydev)
224{ 188{
225 return open (ttydev, O_RDWR | O_NOCTTY, 0); 189 return open (ttydev, O_RDWR | O_NOCTTY, 0);
… …
228/*----------------------------------------------------------------------*/ 192/*----------------------------------------------------------------------*/
229/* 193/*
230 * 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
231 */ 195 */
232static int 196static int
233control_tty (int fd_tty, const char *ttydev) 197control_tty (int fd_tty)
234{ 198{
235#ifndef __QNX__
236 int fd; 199 int fd;
237 200
238 /* ---------------------------------------- */
239# ifdef HAVE_SETSID
240 setsid (); 201 setsid ();
241# endif
242# if defined(HAVE_SETPGID)
243 setpgid (0, 0);
244# elif defined(HAVE_SETPGRP)
245 setpgrp (0, 0);
246# endif
247 202
248 /* ---------------------------------------- */
249# ifdef TIOCNOTTY
250 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
251 if (fd >= 0)
252 {
253 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
254 close (fd);
255 }
256# endif
257
258 /* ---------------------------------------- */
259 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
260 if (fd >= 0)
261 close (fd); /* ouch: still have controlling tty */
262
263 /* ---------------------------------------- */
264#if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 203#if defined(HAVE_DEV_PTMX) && defined(I_PUSH)
265 /* 204 /*
266 * Push STREAMS modules: 205 * Push STREAMS modules:
267 * ptem: pseudo-terminal hardware emulation module. 206 * ptem: pseudo-terminal hardware emulation module.
268 * ldterm: standard terminal line discipline. 207 * ldterm: standard terminal line discipline.
269 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 208 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
… …
277 * documentation is really unclear about whether it is any close () on 216 * documentation is really unclear about whether it is any close () on
278 * 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
279 * 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
280 * through - Geoff Wing 219 * through - Geoff Wing
281 */ 220 */
282# ifdef HAVE_ISASTREAM 221#if defined(HAVE_ISASTREAM) && defined(HAVE_STROPTS_H)
283 if (isastream (fd_tty) == 1) 222 if (isastream (fd_tty) == 1)
284# endif 223# endif
285 { 224 {
286 ioctl (fd_tty, I_PUSH, "ptem"); 225 ioctl (fd_tty, I_PUSH, "ptem");
287 ioctl (fd_tty, I_PUSH, "ldterm"); 226 ioctl (fd_tty, I_PUSH, "ldterm");
288 ioctl (fd_tty, I_PUSH, "ttcompat"); 227 ioctl (fd_tty, I_PUSH, "ttcompat");
289 } 228 }
290#endif 229#endif
291 /* ---------------------------------------- */ 230
292# if defined(TIOCSCTTY) 231#ifdef TIOCSCTTY
293 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 232 ioctl (fd_tty, TIOCSCTTY, NULL);
294# elif defined(TIOCSETCTTY)
295 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
296# else 233#else
297 fd = open (ttydev, O_RDWR); 234 fd = open (ttyname (fd_tty), O_RDWR);
298 if (fd >= 0) 235 if (fd >= 0)
299 close (fd); 236 close (fd);
300# endif 237#endif
301 /* ---------------------------------------- */ 238
302 fd = open ("/dev/tty", O_WRONLY); 239 fd = open ("/dev/tty", O_WRONLY);
303 if (fd < 0) 240 if (fd < 0)
304 return -1; /* fatal */ 241 return -1; /* fatal */
242
305 close (fd); 243 close (fd);
306 /* ---------------------------------------- */
307#endif /* ! __QNX__ */
308 244
309 return 0; 245 return 0;
310} 246}
311 247
312#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
313static struct ttyconf { 291static struct ttyconf {
314 gid_t gid; 292 gid_t gid;
315 mode_t mode; 293 mode_t mode;
316 294
317 ttyconf () 295 ttyconf ()
318 { 296 {
319#ifdef TTY_GID_SUPPORT 297#ifdef TTY_GID_SUPPORT
320 struct group *gr = getgrnam ("tty"); 298 struct group *gr = getgrnam ("tty");
321 299
322 if (gr) 300 if (gr)
301 {
323 { /* change group ownership of tty to "tty" */ 302 /* change group ownership of tty to "tty" */
324 mode = S_IRUSR | S_IWUSR | S_IWGRP; 303 mode = S_IRUSR | S_IWUSR | S_IWGRP;
325 gid = gr->gr_gid; 304 gid = gr->gr_gid;
326 } 305 }
327 else 306 else
328#endif /* TTY_GID_SUPPORT */ 307#endif /* TTY_GID_SUPPORT */
329 { 308 {
330 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; 309 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
331 gid = getgid (); 310 gid = 0;
332 } 311 }
333 } 312 }
334} ttyconf; 313} ttyconf;
335 314
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
336void 331void
337rxvt_ptytty::privileges (rxvt_privaction action) 332ptytty_unix::put ()
338{ 333{
339 rxvt_privileges (RESTORE); 334 if (name)
340
341 if (action == SAVE)
342 {
343 //next_tty_action = RESTORE;
344# ifndef RESET_TTY_TO_COMMON_DEFAULTS
345 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
346 if (lstat (name, &savestat) < 0) /* you lose out */
347 ;//next_tty_action = IGNORE;
348 else
349# endif
350
351 {
352 chown (name, getuid (), ttyconf.gid); /* fail silently */
353 chmod (name, ttyconf.mode);
354# ifdef HAVE_REVOKE
355 revoke (name);
356# endif
357
358 }
359 } 335 {
360 else 336 chmod (name, RESTORE_TTY_MODE);
361 { /* action == RESTORE */
362 //next_tty_action = IGNORE;
363# ifndef RESET_TTY_TO_COMMON_DEFAULTS
364 chmod (name, savestat.st_mode);
365 chown (name, savestat.st_uid, savestat.st_gid);
366# else
367 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
368 chown (name, 0, 0); 337 chown (name, 0, ttyconf.gid);
369# endif
370
371 } 338 }
372 339
373 rxvt_privileges (IGNORE); 340 close_tty ();
374}
375#endif
376 341
377rxvt_ptytty::rxvt_ptytty () 342 if (pty >= 0)
378{ 343 close (pty);
344
345 free (name);
346
379 pty = tty = -1; 347 pty = tty = -1;
380 name = 0; 348 name = 0;
381} 349}
382 350
383rxvt_ptytty::~rxvt_ptytty ()
384{
385 put ();
386}
387
388void
389
390rxvt_ptytty::close_tty ()
391{
392 if (tty >= 0) close (tty);
393 tty = -1;
394}
395
396void
397rxvt_ptytty::put ()
398{
399#ifndef NO_SETOWNER_TTYDEV
400 if (tty >= 0)
401 privileges (RESTORE);
402#endif
403
404 if (pty >= 0) close (pty);
405 close_tty ();
406 free (name);
407
408 pty = tty = -1;
409 name = 0;
410}
411
412bool 351bool
413rxvt_ptytty::make_controlling_tty () 352ptytty_unix::get ()
414{
415 return control_tty (tty, name) >= 0;
416}
417
418bool
419rxvt_ptytty::get ()
420{ 353{
421 /* get master (pty) */ 354 /* get master (pty) */
422 if ((pty = get_pty (&tty, &name)) < 0) 355 if ((pty = get_pty (&tty, &name)) < 0)
423 return false; 356 return false;
424 357
… …
426 359
427 /* get slave (tty) */ 360 /* get slave (tty) */
428 if (tty < 0) 361 if (tty < 0)
429 { 362 {
430#ifndef NO_SETOWNER_TTYDEV 363#ifndef NO_SETOWNER_TTYDEV
431 privileges (SAVE); 364 chown (name, getuid (), ttyconf.gid); /* fail silently */
365 chmod (name, ttyconf.mode);
366# ifdef HAVE_REVOKE
367 revoke (name);
368# endif
432#endif 369#endif
433 370
434 if ((tty = get_tty (name)) < 0) 371 if ((tty = get_tty (name)) < 0)
435 { 372 {
436 put (); 373 put ();
… …
439 } 376 }
440 377
441 return true; 378 return true;
442} 379}
443 380
444void
445rxvt_ptytty::set_utf8_mode (bool on)
446{
447#ifdef IUTF8
448 if (pty != -1)
449 {
450 struct termios tio;
451
452 if (tcgetattr (pty, &tio) != -1)
453 {
454 tcflag_t new_cflag = tio.c_iflag;
455
456 if (on)
457 new_cflag |= IUTF8;
458 else
459 new_cflag &= ~IUTF8;
460
461 if (new_cflag != tio.c_iflag)
462 {
463 tio.c_iflag = new_cflag;
464 tcsetattr (pty, TCSANOW, &tio);
465 }
466 }
467 }
468#endif
469}
470
471/*----------------------- end-of-file (C source) -----------------------*/
472

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines