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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.36 by root, Tue Jan 17 10:59:32 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# 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 37#include <sys/stat.h>
33#ifdef HAVE_UNISTD_H
34# include <unistd.h> 38#include <unistd.h>
35#endif
36#ifdef HAVE_FCNTL_H
37# include <fcntl.h> 39#include <fcntl.h>
38#endif 40
39#ifdef HAVE_SYS_IOCTL_H 41#ifdef HAVE_SYS_IOCTL_H
40# include <sys/ioctl.h> 42# include <sys/ioctl.h>
41#endif 43#endif
42#if defined(PTYS_ARE_PTMX) && defined(HAVE_SYS_STROPTS_H) 44#if defined(HAVE_DEV_PTMX) && defined(HAVE_SYS_STROPTS_H)
43# include <sys/stropts.h> /* for I_PUSH */ 45# include <sys/stropts.h> /* for I_PUSH */
44#endif 46#endif
45#ifdef HAVE_ISASTREAM 47#if defined(HAVE_ISASTREAM) && defined(HAVE_STROPTS_H)
46# include <stropts.h> 48# include <stropts.h>
47#endif 49#endif
48#if defined(HAVE_PTY_H) 50#if defined(HAVE_PTY_H)
49# include <pty.h> 51# include <pty.h>
50#elif defined(HAVE_LIBUTIL_H) 52#elif defined(HAVE_LIBUTIL_H)
51# include <libutil.h> 53# include <libutil.h>
52#elif defined(HAVE_UTIL_H) 54#elif defined(HAVE_UTIL_H)
53# include <util.h> 55# include <util.h>
54#endif 56#endif
57#ifdef TTY_GID_SUPPORT
58#include <grp.h>
59#endif
55 60
56#include <cstdio> 61#include <cstdio>
57#include <grp.h>
58 62
59///////////////////////////////////////////////////////////////////////////// 63/////////////////////////////////////////////////////////////////////////////
60 64
61/* ------------------------------------------------------------------------- * 65/* ------------------------------------------------------------------------- *
62 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 66 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
63 * ------------------------------------------------------------------------- */ 67 * ------------------------------------------------------------------------- */
64/* 68/*
65 * Returns pty file descriptor, or -1 on failure 69 * Returns pty file descriptor, or -1 on failure
66 * 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.
67 * 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
68 */ 72 */
73#if defined(UNIX98_PTY)
74
69static int 75 static int
70get_pty (int *fd_tty, char **ttydev) 76 get_pty (int *fd_tty, char **ttydev)
71{
72 int pfd;
73
74#ifdef PTYS_ARE_OPENPTY
75 char tty_name[sizeof "/dev/pts/????\0"];
76
77 rxvt_privileges(RESTORE);
78 int res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
79 rxvt_privileges(IGNORE);
80
81 if (res != -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#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
95# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_POSIX) || defined(PTYS_ARE_PTMX)
96
97 { 77 {
98# ifdef PTYS_ARE_GETPT 78 int pfd;
79
80# if defined(HAVE_GETPT)
99 pfd = getpt(); 81 pfd = getpt();
100# else 82# elif defined(HAVE_POSIX_OPENPT)
101# ifdef PTYS_ARE_POSIX
102 pfd = posix_openpt (O_RDWR); 83 pfd = posix_openpt (O_RDWR);
103# else 84# else
104 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 85 pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0);
105# endif 86# endif
106# endif
107 87
108 if (pfd >= 0) 88 if (pfd >= 0)
109 { 89 {
110 if (grantpt (pfd) == 0 /* change slave permissions */ 90 if (grantpt (pfd) == 0 /* change slave permissions */
111 && unlockpt (pfd) == 0) 91 && unlockpt (pfd) == 0)
92 {
112 { /* slave now unlocked */ 93 /* slave now unlocked */
113 *ttydev = strdup (ptsname (pfd)); /* get slave's name */ 94 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
114 return pfd; 95 return pfd;
115 } 96 }
97
116 close (pfd); 98 close (pfd);
117 } 99 }
100
101 return -1;
118 } 102 }
119# endif
120#endif
121 103
122#ifdef PTYS_ARE_PTC 104#elif defined(HAVE_OPENPTY)
123 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
124 {
125 *ttydev = strdup (ttyname (pfd));
126 return pfd;
127 }
128#endif
129 105
130#ifdef PTYS_ARE_CLONE 106 static int
131 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 107 get_pty (int *fd_tty, char **ttydev)
132 {
133 *ttydev = strdup (ptsname (pfd));
134 return pfd;
135 }
136#endif
137
138#ifdef PTYS_ARE_NUMERIC
139 { 108 {
140 int idx; 109 int pfd;
141 char *c1, *c2; 110 int res;
142 char pty_name[] = "/dev/ptyp???";
143 char tty_name[] = "/dev/ttyp???";
144 111
145 c1 = &(pty_name[sizeof (pty_name) - 4]); 112 res = openpty (&pfd, fd_tty, NULL, NULL, NULL);
146 c2 = &(tty_name[sizeof (tty_name) - 4]); 113
147 for (idx = 0; idx < 256; idx++) 114 if (res != -1)
148 { 115 {
149 sprintf (c1, "%d", idx); 116 *ttydev = strdup (ttyname (*fd_tty));
150 sprintf (c2, "%d", idx); 117 return pfd;
151 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)
152 { 161 {
153 idx = 256; 162 snprintf(pty_name, 32, "/dev/ptyp%d", i);
154 break; 163 snprintf(tty_name, 32, "/dev/ttyp%d", i);
164 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
165 continue;
155 } 166 }
156 167
157 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 168 if (access (tty_name, R_OK | W_OK) == 0)
158 { 169 {
159 if (access (tty_name, R_OK | W_OK) == 0)
160 {
161 *ttydev = strdup (tty_name); 170 *ttydev = strdup (tty_name);
162 return pfd; 171 return pfd;
163 }
164
165 close (pfd);
166 } 172 }
173
174 close (pfd);
167 } 175 }
176
177 return -1;
168 } 178 }
169#endif
170 179
171#ifdef PTYS_ARE_SEARCHED
172 {
173 const char *c1, *c2;
174 char pty_name[] = "/dev/pty??";
175 char tty_name[] = "/dev/tty??";
176
177# ifndef PTYCHAR1
178# define PTYCHAR1 "pqrstuvwxyz"
179# endif 180#endif
180# ifndef PTYCHAR2
181# define PTYCHAR2 "0123456789abcdef"
182# endif
183
184 for (c1 = PTYCHAR1; *c1; c1++)
185 {
186 pty_name[ (sizeof (pty_name) - 3)] =
187 tty_name[ (sizeof (pty_name) - 3)] = *c1;
188 for (c2 = PTYCHAR2; *c2; c2++)
189 {
190 pty_name[ (sizeof (pty_name) - 2)] =
191 tty_name[ (sizeof (pty_name) - 2)] = *c2;
192 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
193 {
194 if (access (tty_name, R_OK | W_OK) == 0)
195 {
196 *ttydev = strdup (tty_name);
197 return pfd;
198 }
199
200 close (pfd);
201 }
202 }
203 }
204 }
205#endif
206
207 return -1;
208}
209 181
210/*----------------------------------------------------------------------*/ 182/*----------------------------------------------------------------------*/
211/* 183/*
212 * Returns tty file descriptor, or -1 on failure 184 * Returns tty file descriptor, or -1 on failure
213 */ 185 */
214static int 186static int
215get_tty (char *ttydev) 187get_tty (char *ttydev)
216{ 188{
217 return open (ttydev, O_RDWR | O_NOCTTY, 0); 189 return open (ttydev, O_RDWR | O_NOCTTY, 0);
… …
222 * 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
223 */ 195 */
224static int 196static int
225control_tty (int fd_tty) 197control_tty (int fd_tty)
226{ 198{
227#ifndef __QNX__
228 int fd; 199 int fd;
229 200
230 /* ---------------------------------------- */
231# ifdef HAVE_SETSID
232 setsid (); 201 setsid ();
233# endif
234# if defined(HAVE_SETPGID)
235 setpgid (0, 0);
236# elif defined(HAVE_SETPGRP)
237 setpgrp (0, 0);
238# endif
239 202
240 /* ---------------------------------------- */
241# ifdef TIOCNOTTY
242 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
243 if (fd >= 0)
244 {
245 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
246 close (fd);
247 }
248# endif
249
250 /* ---------------------------------------- */
251 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
252 if (fd >= 0)
253 close (fd); /* ouch: still have controlling tty */
254
255 /* ---------------------------------------- */
256# if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 203#if defined(HAVE_DEV_PTMX) && defined(I_PUSH)
257 /* 204 /*
258 * Push STREAMS modules: 205 * Push STREAMS modules:
259 * ptem: pseudo-terminal hardware emulation module. 206 * ptem: pseudo-terminal hardware emulation module.
260 * ldterm: standard terminal line discipline. 207 * ldterm: standard terminal line discipline.
261 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 208 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
… …
269 * documentation is really unclear about whether it is any close () on 216 * documentation is really unclear about whether it is any close () on
270 * 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
271 * 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
272 * through - Geoff Wing 219 * through - Geoff Wing
273 */ 220 */
274# ifdef HAVE_ISASTREAM 221#if defined(HAVE_ISASTREAM) && defined(HAVE_STROPTS_H)
275 if (isastream (fd_tty) == 1) 222 if (isastream (fd_tty) == 1)
276# endif 223# endif
277 { 224 {
278 ioctl (fd_tty, I_PUSH, "ptem"); 225 ioctl (fd_tty, I_PUSH, "ptem");
279 ioctl (fd_tty, I_PUSH, "ldterm"); 226 ioctl (fd_tty, I_PUSH, "ldterm");
280 ioctl (fd_tty, I_PUSH, "ttcompat"); 227 ioctl (fd_tty, I_PUSH, "ttcompat");
281 } 228 }
282# endif 229#endif
283 /* ---------------------------------------- */ 230
231#ifdef TIOCSCTTY
284 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 232 ioctl (fd_tty, TIOCSCTTY, NULL);
285 /* ---------------------------------------- */ 233#else
234 fd = open (ttyname (fd_tty), O_RDWR);
235 if (fd >= 0)
236 close (fd);
237#endif
238
286 fd = open ("/dev/tty", O_WRONLY); 239 fd = open ("/dev/tty", O_WRONLY);
287 if (fd < 0) 240 if (fd < 0)
288 return -1; /* fatal */ 241 return -1; /* fatal */
242
289 close (fd); 243 close (fd);
290 /* ---------------------------------------- */
291#endif /* ! __QNX__ */
292 244
293 return 0; 245 return 0;
294} 246}
295 247
296void 248void
297rxvt_ptytty::close_tty () 249ptytty::close_tty ()
298{ 250{
299 if (tty < 0) 251 if (tty < 0)
300 return; 252 return;
301 253
302 close (tty); 254 close (tty);
303 tty = -1; 255 tty = -1;
304} 256}
305 257
306bool 258bool
307rxvt_ptytty::make_controlling_tty () 259ptytty::make_controlling_tty ()
308{ 260{
309 return control_tty (tty) >= 0; 261 return control_tty (tty) >= 0;
310} 262}
311 263
312void 264void
313rxvt_ptytty::set_utf8_mode (bool on) 265ptytty::set_utf8_mode (bool on)
314{ 266{
315#ifdef IUTF8 267#ifdef IUTF8
316 if (pty < 0) 268 if (pty < 0)
317 return; 269 return;
318 270
… …
334 } 286 }
335 } 287 }
336#endif 288#endif
337} 289}
338 290
339/////////////////////////////////////////////////////////////////////////////
340
341#ifndef NO_SETOWNER_TTYDEV
342static struct ttyconf { 291static struct ttyconf {
343 gid_t gid; 292 gid_t gid;
344 mode_t mode; 293 mode_t mode;
345 294
346 ttyconf () 295 ttyconf ()
347 { 296 {
348#ifdef TTY_GID_SUPPORT 297#ifdef TTY_GID_SUPPORT
349 struct group *gr = getgrnam ("tty"); 298 struct group *gr = getgrnam ("tty");
350 299
351 if (gr) 300 if (gr)
301 {
352 { /* change group ownership of tty to "tty" */ 302 /* change group ownership of tty to "tty" */
353 mode = S_IRUSR | S_IWUSR | S_IWGRP; 303 mode = S_IRUSR | S_IWUSR | S_IWGRP;
354 gid = gr->gr_gid; 304 gid = gr->gr_gid;
355 } 305 }
356 else 306 else
357#endif /* TTY_GID_SUPPORT */ 307#endif /* TTY_GID_SUPPORT */
358 { 308 {
359 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; 309 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
360 gid = getgid (); 310 gid = 0;
361 } 311 }
362 } 312 }
363} ttyconf; 313} ttyconf;
364 314
365///////////////////////////////////////////////////////////////////////////// 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}
366 330
367void 331void
368rxvt_ptytty_unix::privileges (rxvt_privaction action) 332ptytty_unix::put ()
369{ 333{
370 if (!name || !*name) 334 if (name)
371 return;
372
373 rxvt_privileges (RESTORE);
374
375 if (action == SAVE)
376 {
377# ifndef RESET_TTY_TO_COMMON_DEFAULTS
378 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
379 if (lstat (name, &savestat) < 0) /* you lose out */
380 ;
381 else
382# endif
383 {
384 saved = true;
385 chown (name, getuid (), ttyconf.gid); /* fail silently */
386 chmod (name, ttyconf.mode);
387# ifdef HAVE_REVOKE
388 revoke (name);
389# endif
390 }
391 } 335 {
392 else 336 chmod (name, RESTORE_TTY_MODE);
393 { /* action == RESTORE */
394# ifndef RESET_TTY_TO_COMMON_DEFAULTS
395 if (saved)
396 {
397 chmod (name, savestat.st_mode);
398 chown (name, savestat.st_uid, savestat.st_gid);
399 }
400# else
401 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
402 chown (name, 0, 0); 337 chown (name, 0, ttyconf.gid);
403# endif
404
405 } 338 }
406 339
407 rxvt_privileges (IGNORE); 340 close_tty ();
408}
409#endif
410 341
411rxvt_ptytty_unix::rxvt_ptytty_unix () 342 if (pty >= 0)
412{ 343 close (pty);
344
345 free (name);
346
413 pty = tty = -1; 347 pty = tty = -1;
414 name = 0; 348 name = 0;
415#ifndef NO_SETOWNER_TTYDEV
416 saved = false;
417#endif
418#if UTMP_SUPPORT
419 cmd_pid = 0;
420#endif
421}
422
423rxvt_ptytty_unix::~rxvt_ptytty_unix ()
424{
425 logout ();
426 put ();
427}
428
429void
430rxvt_ptytty_unix::put ()
431{
432#ifndef NO_SETOWNER_TTYDEV
433 privileges (RESTORE);
434#endif
435
436 if (pty >= 0) close (pty);
437 close_tty ();
438 free (name);
439
440 pty = tty = -1;
441 name = 0;
442} 349}
443 350
444bool 351bool
445rxvt_ptytty_unix::get () 352ptytty_unix::get ()
446{ 353{
447 /* get master (pty) */ 354 /* get master (pty) */
448 if ((pty = get_pty (&tty, &name)) < 0) 355 if ((pty = get_pty (&tty, &name)) < 0)
449 return false; 356 return false;
450 357
… …
452 359
453 /* get slave (tty) */ 360 /* get slave (tty) */
454 if (tty < 0) 361 if (tty < 0)
455 { 362 {
456#ifndef NO_SETOWNER_TTYDEV 363#ifndef NO_SETOWNER_TTYDEV
457 privileges (SAVE); 364 chown (name, getuid (), ttyconf.gid); /* fail silently */
365 chmod (name, ttyconf.mode);
366# ifdef HAVE_REVOKE
367 revoke (name);
368# endif
458#endif 369#endif
459 370
460 if ((tty = get_tty (name)) < 0) 371 if ((tty = get_tty (name)) < 0)
461 { 372 {
462 put (); 373 put ();
… …
465 } 376 }
466 377
467 return true; 378 return true;
468} 379}
469 380
470/*----------------------- end-of-file (C source) -----------------------*/
471

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