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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.18 by root, Sun Dec 12 05:54:05 2004 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 49#if defined(HAVE_PTY_H)
52// better do this via configure, but.... 50# include <pty.h>
53#if defined(__FreeBSD__) 51#elif defined(HAVE_LIBUTIL_H)
54# include <libutil.h> 52# include <libutil.h>
55#elif defined(__DARWIN__) || (defined (__MACH__) && defined (__APPLE__)) 53#elif defined(HAVE_UTIL_H)
56# include <util.h> 54# include <util.h>
57#endif 55#endif
56#ifdef TTY_GID_SUPPORT
57#include <grp.h>
58#endif
58 59
59#include <cstdio> 60#include <cstdio>
60#include <grp.h> 61
62/////////////////////////////////////////////////////////////////////////////
61 63
62/* ------------------------------------------------------------------------- * 64/* ------------------------------------------------------------------------- *
63 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 65 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
64 * ------------------------------------------------------------------------- */ 66 * ------------------------------------------------------------------------- */
65/* 67/*
66 * Returns pty file descriptor, or -1 on failure 68 * Returns pty file descriptor, or -1 on failure
67 * 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.
68 * 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
69 */ 71 */
72#if defined(UNIX98_PTY)
73
70static int 74 static int
71get_pty (int *fd_tty, char **ttydev) 75 get_pty (int *fd_tty, char **ttydev)
72{ 76 {
73 int pfd; 77 int pfd;
74 78
75#ifdef PTYS_ARE_OPENPTY 79# if defined(HAVE_GETPT)
76 char tty_name[sizeof "/dev/pts/????\0"];
77
78 if (openpty (&pfd, fd_tty, tty_name, NULL, NULL) != -1)
79 {
80 *ttydev = strdup (tty_name);
81 return pfd;
82 }
83#endif
84
85#ifdef PTYS_ARE__GETPTY
86 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
87 if (*ttydev != NULL)
88 return pfd;
89#endif
90
91#ifdef PTYS_ARE_GETPTY
92
93 char *ptydev;
94
95 while ((ptydev = getpty ()) != NULL)
96 if ((pfd = open (ptydev, O_RDWR | O_NOCTTY, 0)) >= 0)
97 {
98 *ttydev = ptydev;
99 return pfd;
100 }
101#endif
102
103#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
104# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_PTMX)
105
106 {
107# ifdef PTYS_ARE_GETPT
108 pfd = getpt (); 80 pfd = getpt();
81# elif defined(HAVE_POSIX_OPENPT)
82 pfd = posix_openpt (O_RDWR);
109# else 83# else
110 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 84 pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0);
111# endif 85# endif
112 86
113 if (pfd >= 0) 87 if (pfd >= 0)
114 { 88 {
115 if (grantpt (pfd) == 0 /* change slave permissions */ 89 if (grantpt (pfd) == 0 /* change slave permissions */
116 && unlockpt (pfd) == 0) 90 && unlockpt (pfd) == 0)
91 {
117 { /* slave now unlocked */ 92 /* slave now unlocked */
118 *ttydev = strdup (ptsname (pfd)); /* get slave's name */ 93 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
119 return pfd; 94 return pfd;
120 } 95 }
96
121 close (pfd); 97 close (pfd);
122 } 98 }
123 }
124# endif
125#endif
126 99
127#ifdef PTYS_ARE_PTC 100 return -1;
128 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)
129 { 114 {
130 *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);
131 return pfd; 134 return pfd;
132 } 135 }
133#endif
134 136
135#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
136 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 147 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
137 {
138 *ttydev = strdup (ptsname (pfd));
139 return pfd;
140 }
141#endif
142
143#ifdef PTYS_ARE_NUMERIC
144 {
145 int idx;
146 char *c1, *c2;
147 char pty_name[] = "/dev/ptyp???";
148 char tty_name[] = "/dev/ttyp???";
149
150 c1 = &(pty_name[sizeof (pty_name) - 4]);
151 c2 = &(tty_name[sizeof (tty_name) - 4]);
152 for (idx = 0; idx < 256; idx++)
153 { 148 {
154 sprintf (c1, "%d", idx); 149 *ttydev = strdup (ttyname (pfd));
155 sprintf (c2, "%d", idx); 150 return pfd;
156 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)
157 { 191 {
158 idx = 256; 192 snprintf(pty_name, 32, "/dev/ptyp%d", i);
159 break; 193 snprintf(tty_name, 32, "/dev/ttyp%d", i);
194 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
195 continue;
160 } 196 }
161 197
162 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 198 if (access (tty_name, R_OK | W_OK) == 0)
163 { 199 {
164 if (access (tty_name, R_OK | W_OK) == 0)
165 {
166 *ttydev = strdup (tty_name); 200 *ttydev = strdup (tty_name);
167 return pfd; 201 return pfd;
168 }
169
170 close (pfd);
171 } 202 }
203
204 close (pfd);
172 } 205 }
173 }
174#endif
175 206
176#ifdef PTYS_ARE_SEARCHED
177 {
178 const char *c1, *c2;
179 char pty_name[] = "/dev/pty??";
180 char tty_name[] = "/dev/tty??";
181
182# ifndef PTYCHAR1
183# define PTYCHAR1 "pqrstuvwxyz"
184# endif
185# ifndef PTYCHAR2
186# define PTYCHAR2 "0123456789abcdef"
187# endif
188
189 for (c1 = PTYCHAR1; *c1; c1++)
190 {
191 pty_name[ (sizeof (pty_name) - 3)] =
192 tty_name[ (sizeof (pty_name) - 3)] = *c1;
193 for (c2 = PTYCHAR2; *c2; c2++)
194 {
195 pty_name[ (sizeof (pty_name) - 2)] =
196 tty_name[ (sizeof (pty_name) - 2)] = *c2;
197 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
198 {
199 if (access (tty_name, R_OK | W_OK) == 0)
200 {
201 *ttydev = strdup (tty_name);
202 return pfd;
203 }
204
205 close (pfd);
206 }
207 }
208 }
209 }
210#endif
211
212 return -1; 207 return -1;
213} 208 }
209
210#endif
214 211
215/*----------------------------------------------------------------------*/ 212/*----------------------------------------------------------------------*/
216/* 213/*
217 * Returns tty file descriptor, or -1 on failure 214 * Returns tty file descriptor, or -1 on failure
218 */ 215 */
219static int 216static int
220get_tty (char *ttydev) 217get_tty (char *ttydev)
221{ 218{
222 return open (ttydev, O_RDWR | O_NOCTTY, 0); 219 return open (ttydev, O_RDWR | O_NOCTTY, 0);
… …
225/*----------------------------------------------------------------------*/ 222/*----------------------------------------------------------------------*/
226/* 223/*
227 * 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
228 */ 225 */
229static int 226static int
230control_tty (int fd_tty, const char *ttydev) 227control_tty (int fd_tty)
231{ 228{
232#ifndef __QNX__
233 int fd; 229 int fd;
234 230
235 /* ---------------------------------------- */
236# ifdef HAVE_SETSID
237 setsid (); 231 setsid ();
238# endif
239# if defined(HAVE_SETPGID)
240 setpgid (0, 0);
241# elif defined(HAVE_SETPGRP)
242 setpgrp (0, 0);
243# endif
244 232
245 /* ---------------------------------------- */
246# ifdef TIOCNOTTY
247 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
248 if (fd >= 0)
249 {
250 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
251 close (fd);
252 }
253# endif
254
255 /* ---------------------------------------- */
256 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
257 if (fd >= 0)
258 close (fd); /* ouch: still have controlling tty */
259
260 /* ---------------------------------------- */
261#if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 233#if defined(HAVE_DEV_PTMX) && defined(I_PUSH)
262 /* 234 /*
263 * Push STREAMS modules: 235 * Push STREAMS modules:
264 * ptem: pseudo-terminal hardware emulation module. 236 * ptem: pseudo-terminal hardware emulation module.
265 * ldterm: standard terminal line discipline. 237 * ldterm: standard terminal line discipline.
266 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 238 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
… …
283 ioctl (fd_tty, I_PUSH, "ptem"); 255 ioctl (fd_tty, I_PUSH, "ptem");
284 ioctl (fd_tty, I_PUSH, "ldterm"); 256 ioctl (fd_tty, I_PUSH, "ldterm");
285 ioctl (fd_tty, I_PUSH, "ttcompat"); 257 ioctl (fd_tty, I_PUSH, "ttcompat");
286 } 258 }
287#endif 259#endif
288 /* ---------------------------------------- */ 260
289# if defined(TIOCSCTTY) 261#ifdef TIOCSCTTY
290 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 262 ioctl (fd_tty, TIOCSCTTY, NULL);
291# elif defined(TIOCSETCTTY)
292 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
293# else 263#else
294 fd = open (ttydev, O_RDWR); 264 fd = open (ttyname (fd_tty), O_RDWR);
295 if (fd >= 0) 265 if (fd >= 0)
296 close (fd); 266 close (fd);
297# endif 267#endif
298 /* ---------------------------------------- */ 268
299 fd = open ("/dev/tty", O_WRONLY); 269 fd = open ("/dev/tty", O_WRONLY);
300 if (fd < 0) 270 if (fd < 0)
301 return -1; /* fatal */ 271 return -1; /* fatal */
272
302 close (fd); 273 close (fd);
303 /* ---------------------------------------- */
304#endif /* ! __QNX__ */
305 274
306 return 0; 275 return 0;
307} 276}
308 277
309#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
310static struct ttyconf { 321static struct ttyconf {
311 gid_t gid; 322 gid_t gid;
312 mode_t mode; 323 mode_t mode;
313 324
314 ttyconf () 325 ttyconf ()
315 { 326 {
316#ifdef TTY_GID_SUPPORT 327#ifdef TTY_GID_SUPPORT
317 struct group *gr = getgrnam ("tty"); 328 struct group *gr = getgrnam ("tty");
318 329
319 if (gr) 330 if (gr)
331 {
320 { /* change group ownership of tty to "tty" */ 332 /* change group ownership of tty to "tty" */
321 mode = S_IRUSR | S_IWUSR | S_IWGRP; 333 mode = S_IRUSR | S_IWUSR | S_IWGRP;
322 gid = gr->gr_gid; 334 gid = gr->gr_gid;
323 } 335 }
324 else 336 else
325#endif /* TTY_GID_SUPPORT */ 337#endif /* TTY_GID_SUPPORT */
326 { 338 {
327 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; 339 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
328 gid = getgid (); 340 gid = 0;
329 } 341 }
330 } 342 }
331} ttyconf; 343} ttyconf;
332 344
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
333void 361void
334rxvt_ptytty::privileges (rxvt_privaction action) 362ptytty_unix::put ()
335{ 363{
336 rxvt_privileges (RESTORE); 364 if (name)
337
338 if (action == SAVE)
339 { 365 {
340 //next_tty_action = RESTORE; 366 chmod (name, RESTORE_TTY_MODE);
341# ifndef RESET_TTY_TO_COMMON_DEFAULTS
342 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
343 if (lstat (name, &savestat) < 0) /* you lose out */
344 ;//next_tty_action = IGNORE;
345 else
346# endif
347
348 {
349 chown (name, getuid (), ttyconf.gid); /* fail silently */
350 chmod (name, ttyconf.mode);
351# ifdef HAVE_REVOKE
352 revoke (name);
353# endif
354
355 }
356 }
357 else
358 { /* action == RESTORE */
359 //next_tty_action = IGNORE;
360# ifndef RESET_TTY_TO_COMMON_DEFAULTS
361 chmod (name, savestat.st_mode);
362 chown (name, savestat.st_uid, savestat.st_gid);
363# else
364 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
365 chown (name, 0, 0); 367 chown (name, 0, ttyconf.gid);
366# endif
367
368 } 368 }
369 369
370 rxvt_privileges (IGNORE); 370 close_tty ();
371}
372#endif
373 371
374rxvt_ptytty::rxvt_ptytty () 372 if (pty >= 0)
375{ 373 close (pty);
374
375 free (name);
376
376 pty = tty = -1; 377 pty = tty = -1;
377 name = 0; 378 name = 0;
378} 379}
379 380
380rxvt_ptytty::~rxvt_ptytty ()
381{
382 put ();
383}
384
385void
386
387rxvt_ptytty::close_tty ()
388{
389 if (tty >= 0) close (tty);
390 tty = -1;
391}
392
393void
394rxvt_ptytty::put ()
395{
396#ifndef NO_SETOWNER_TTYDEV
397 if (tty >= 0)
398 privileges (RESTORE);
399#endif
400
401 if (pty >= 0) close (pty);
402 close_tty ();
403 free (name);
404
405 pty = tty = -1;
406 name = 0;
407}
408
409bool 381bool
410rxvt_ptytty::make_controlling_tty () 382ptytty_unix::get ()
411{
412 return control_tty (tty, name) >= 0;
413}
414
415bool
416rxvt_ptytty::get ()
417{ 383{
418 /* get master (pty) */ 384 /* get master (pty) */
419 if ((pty = get_pty (&tty, &name)) < 0) 385 if ((pty = get_pty (&tty, &name)) < 0)
420 return false; 386 return false;
421 387
… …
423 389
424 /* get slave (tty) */ 390 /* get slave (tty) */
425 if (tty < 0) 391 if (tty < 0)
426 { 392 {
427#ifndef NO_SETOWNER_TTYDEV 393#ifndef NO_SETOWNER_TTYDEV
428 privileges (SAVE); 394 chown (name, getuid (), ttyconf.gid); /* fail silently */
395 chmod (name, ttyconf.mode);
396# ifdef HAVE_REVOKE
397 revoke (name);
398# endif
429#endif 399#endif
430 400
431 if ((tty = get_tty (name)) < 0) 401 if ((tty = get_tty (name)) < 0)
432 { 402 {
433 put (); 403 put ();
… …
436 } 406 }
437 407
438 return true; 408 return true;
439} 409}
440 410
441/*----------------------- end-of-file (C source) -----------------------*/
442

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