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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.22 by root, Tue Jan 11 04:44:57 2005 UTC vs.
Revision 1.64 by ayin, Tue Jun 26 00:40:28 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 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 {
110# ifdef PTYS_ARE_GETPT
111 pfd = getpt (); 80 pfd = getpt();
81# elif defined(HAVE_POSIX_OPENPT)
82 pfd = posix_openpt (O_RDWR);
112# else 83# else
113 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 84 pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0);
114# endif 85# endif
115 86
116 if (pfd >= 0) 87 if (pfd >= 0)
117 { 88 {
118 if (grantpt (pfd) == 0 /* change slave permissions */ 89 if (grantpt (pfd) == 0 /* change slave permissions */
119 && unlockpt (pfd) == 0) 90 && unlockpt (pfd) == 0)
120 { /* slave now unlocked */ 91 { /* slave now unlocked */
121 *ttydev = strdup (ptsname (pfd)); /* get slave's name */ 92 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
122 return pfd; 93 return pfd;
123 } 94 }
95
124 close (pfd); 96 close (pfd);
125 } 97 }
126 }
127# endif
128#endif
129 98
130#ifdef PTYS_ARE_PTC 99 return -1;
131 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) 100 }
101
102#elif defined(HAVE_OPENPTY)
103
104 static int
105 get_pty (int *fd_tty, char **ttydev)
106 {
107 int pfd;
108 int res;
109 char tty_name[32];
110
111 res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
112
113 if (res != -1)
132 { 114 {
133 *ttydev = strdup (ttyname (pfd)); 115 *ttydev = strdup (tty_name);
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
129 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
130
131 if (*ttydev != NULL)
134 return pfd; 132 return pfd;
133
134 return -1;
135 } 135 }
136#endif
137 136
138#ifdef PTYS_ARE_CLONE 137#elif defined(HAVE_DEV_PTC)
138
139 static int
140 get_pty (int *fd_tty, char **ttydev)
141 {
142 int pfd;
143
139 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 144 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
140 {
141 *ttydev = strdup (ptsname (pfd));
142 return pfd;
143 }
144#endif
145
146#ifdef PTYS_ARE_NUMERIC
147 {
148 int idx;
149 char *c1, *c2;
150 char pty_name[] = "/dev/ptyp???";
151 char tty_name[] = "/dev/ttyp???";
152
153 c1 = &(pty_name[sizeof (pty_name) - 4]);
154 c2 = &(tty_name[sizeof (tty_name) - 4]);
155 for (idx = 0; idx < 256; idx++)
156 { 145 {
157 sprintf (c1, "%d", idx); 146 *ttydev = strdup (ttyname (pfd));
158 sprintf (c2, "%d", idx); 147 return pfd;
159 if (access (tty_name, F_OK) < 0) 148 }
149
150 return -1;
151 }
152
153#elif defined(HAVE_DEV_CLONE)
154
155 static int
156 get_pty (int *fd_tty, char **ttydev)
157 {
158 int pfd;
159
160 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
161 {
162 *ttydev = strdup (ptsname (pfd));
163 return pfd;
164 }
165
166 return -1;
167 }
168
169#else
170
171 /* Based on the code in openssh/openbsd-compat/bsd-openpty.c */
172 static int
173 get_pty (int *fd_tty, char **ttydev)
174 {
175 int pfd;
176 int i;
177 char pty_name[32];
178 char tty_name[32];
179 const char *majors = "pqrstuvwxyzabcde";
180 const char *minors = "0123456789abcdef";
181
182 for (i = 0; i < 256; i++)
183 {
184 snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]);
185 snprintf(tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]);
186
187 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
160 { 188 {
161 idx = 256; 189 snprintf(pty_name, 32, "/dev/ptyp%d", i);
162 break; 190 snprintf(tty_name, 32, "/dev/ttyp%d", i);
191 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
192 continue;
163 } 193 }
164 194
165 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 195 if (access (tty_name, R_OK | W_OK) == 0)
166 { 196 {
167 if (access (tty_name, R_OK | W_OK) == 0)
168 {
169 *ttydev = strdup (tty_name); 197 *ttydev = strdup (tty_name);
170 return pfd; 198 return pfd;
171 }
172
173 close (pfd);
174 } 199 }
200
201 close (pfd);
175 } 202 }
176 }
177#endif
178 203
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
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; 204 return -1;
216} 205 }
206
207#endif
217 208
218/*----------------------------------------------------------------------*/ 209/*----------------------------------------------------------------------*/
219/* 210/*
220 * Returns tty file descriptor, or -1 on failure 211 * Returns tty file descriptor, or -1 on failure
221 */ 212 */
222static int 213static int
223get_tty (char *ttydev) 214get_tty (char *ttydev)
224{ 215{
225 return open (ttydev, O_RDWR | O_NOCTTY, 0); 216 return open (ttydev, O_RDWR | O_NOCTTY, 0);
… …
228/*----------------------------------------------------------------------*/ 219/*----------------------------------------------------------------------*/
229/* 220/*
230 * Make our tty a controlling tty so that /dev/tty points to us 221 * Make our tty a controlling tty so that /dev/tty points to us
231 */ 222 */
232static int 223static int
233control_tty (int fd_tty, const char *ttydev) 224control_tty (int fd_tty)
234{ 225{
235#ifndef __QNX__
236 int fd;
237
238 /* ---------------------------------------- */
239# ifdef HAVE_SETSID
240 setsid (); 226 setsid ();
241# endif
242# if defined(HAVE_SETPGID)
243 setpgid (0, 0);
244# elif defined(HAVE_SETPGRP)
245 setpgrp (0, 0);
246# endif
247 227
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) 228#if defined(HAVE_DEV_PTMX) && defined(I_PUSH)
265 /* 229 /*
266 * Push STREAMS modules: 230 * Push STREAMS modules:
267 * ptem: pseudo-terminal hardware emulation module. 231 * ptem: pseudo-terminal hardware emulation module.
268 * ldterm: standard terminal line discipline. 232 * ldterm: standard terminal line discipline.
269 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 233 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
… …
286 ioctl (fd_tty, I_PUSH, "ptem"); 250 ioctl (fd_tty, I_PUSH, "ptem");
287 ioctl (fd_tty, I_PUSH, "ldterm"); 251 ioctl (fd_tty, I_PUSH, "ldterm");
288 ioctl (fd_tty, I_PUSH, "ttcompat"); 252 ioctl (fd_tty, I_PUSH, "ttcompat");
289 } 253 }
290#endif 254#endif
291 /* ---------------------------------------- */ 255
292# if defined(TIOCSCTTY) 256#ifdef TIOCSCTTY
293 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 257 ioctl (fd_tty, TIOCSCTTY, NULL);
294# elif defined(TIOCSETCTTY)
295 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
296# else 258#else
297 fd = open (ttydev, O_RDWR); 259 fd = open (name, O_RDWR);
298 if (fd >= 0) 260 if (fd >= 0)
299 close (fd); 261 close (fd);
300# endif 262#endif
301 /* ---------------------------------------- */ 263
302 fd = open ("/dev/tty", O_WRONLY); 264 int fd = open ("/dev/tty", O_WRONLY);
303 if (fd < 0) 265 if (fd < 0)
304 return -1; /* fatal */ 266 return -1; /* fatal */
267
305 close (fd); 268 close (fd);
306 /* ---------------------------------------- */
307#endif /* ! __QNX__ */
308 269
309 return 0; 270 return 0;
310} 271}
311 272
312#ifndef NO_SETOWNER_TTYDEV 273void
274ptytty::close_tty ()
275{
276 if (tty < 0)
277 return;
278
279 close (tty);
280 tty = -1;
281}
282
283bool
284ptytty::make_controlling_tty ()
285{
286 return control_tty (tty) >= 0;
287}
288
289void
290ptytty::set_utf8_mode (bool on)
291{
292#ifdef IUTF8
293 if (pty < 0)
294 return;
295
296 struct termios tio;
297
298 if (tcgetattr (pty, &tio) != -1)
299 {
300 tcflag_t new_cflag = tio.c_iflag;
301
302 if (on)
303 new_cflag |= IUTF8;
304 else
305 new_cflag &= ~IUTF8;
306
307 if (new_cflag != tio.c_iflag)
308 {
309 tio.c_iflag = new_cflag;
310 tcsetattr (pty, TCSANOW, &tio);
311 }
312 }
313#endif
314}
315
313static struct ttyconf { 316static struct ttyconf {
314 gid_t gid; 317 gid_t gid;
315 mode_t mode; 318 mode_t mode;
316 319
317 ttyconf () 320 ttyconf ()
… …
326 } 329 }
327 else 330 else
328#endif /* TTY_GID_SUPPORT */ 331#endif /* TTY_GID_SUPPORT */
329 { 332 {
330 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; 333 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
331 gid = getgid (); 334 gid = 0;
332 } 335 }
333 } 336 }
334} ttyconf; 337} ttyconf;
335 338
339ptytty_unix::ptytty_unix ()
340{
341 name = 0;
342#if UTMP_SUPPORT
343 cmd_pid = 0;
344#endif
345}
346
347ptytty_unix::~ptytty_unix ()
348{
349#if UTMP_SUPPORT
350 logout ();
351#endif
352 put ();
353}
354
336void 355void
337rxvt_ptytty::privileges (rxvt_privaction action) 356ptytty_unix::put ()
338{ 357{
339 rxvt_privileges (RESTORE); 358 if (name)
340
341 if (action == SAVE)
342 { 359 {
343 //next_tty_action = RESTORE; 360 chmod (name, RESTORE_TTY_MODE);
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); 361 chown (name, 0, ttyconf.gid);
354# ifdef HAVE_REVOKE
355 revoke (name);
356# endif
357
358 }
359 } 362 }
360 else
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);
369# endif
370 363
371 } 364 close_tty ();
372 365
373 rxvt_privileges (IGNORE); 366 if (pty >= 0)
374} 367 close (pty);
375#endif
376 368
377rxvt_ptytty::rxvt_ptytty () 369 free (name);
378{ 370
379 pty = tty = -1; 371 pty = tty = -1;
380 name = 0; 372 name = 0;
381} 373}
382 374
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 375bool
413rxvt_ptytty::make_controlling_tty () 376ptytty_unix::get ()
414{
415 return control_tty (tty, name) >= 0;
416}
417
418bool
419rxvt_ptytty::get ()
420{ 377{
421 /* get master (pty) */ 378 /* get master (pty) */
422 if ((pty = get_pty (&tty, &name)) < 0) 379 if ((pty = get_pty (&tty, &name)) < 0)
423 return false; 380 return false;
424 381
… …
426 383
427 /* get slave (tty) */ 384 /* get slave (tty) */
428 if (tty < 0) 385 if (tty < 0)
429 { 386 {
430#ifndef NO_SETOWNER_TTYDEV 387#ifndef NO_SETOWNER_TTYDEV
431 privileges (SAVE); 388 chown (name, getuid (), ttyconf.gid); /* fail silently */
389 chmod (name, ttyconf.mode);
390# ifdef HAVE_REVOKE
391 revoke (name);
392# endif
432#endif 393#endif
433 394
434 if ((tty = get_tty (name)) < 0) 395 if ((tty = get_tty (name)) < 0)
435 { 396 {
436 put (); 397 put ();
… …
439 } 400 }
440 401
441 return true; 402 return true;
442} 403}
443 404
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

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