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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.26 by root, Mon Jan 2 15:10:18 2006 UTC vs.
Revision 1.65 by ayin, Tue Jun 26 21:30:10 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 char *ptydev;
96
97 while ((ptydev = getpty ()) != NULL)
98 if ((pfd = open (ptydev, O_RDWR | O_NOCTTY, 0)) >= 0)
99 {
100 *ttydev = ptydev;
101 return pfd;
102 }
103#endif
104
105#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
106# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_PTMX)
107
108 {
109# ifdef PTYS_ARE_GETPT
110 pfd = getpt (); 80 pfd = getpt();
81# elif defined(HAVE_POSIX_OPENPT)
82 pfd = posix_openpt (O_RDWR);
111# else 83# else
112 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 84 pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0);
113# endif 85# endif
114 86
115 if (pfd >= 0) 87 if (pfd >= 0)
116 { 88 {
117 if (grantpt (pfd) == 0 /* change slave permissions */ 89 if (grantpt (pfd) == 0 /* change slave permissions */
118 && unlockpt (pfd) == 0) 90 && unlockpt (pfd) == 0)
119 { /* slave now unlocked */ 91 { /* slave now unlocked */
120 *ttydev = strdup (ptsname (pfd)); /* get slave's name */ 92 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
121 return pfd; 93 return pfd;
122 } 94 }
95
123 close (pfd); 96 close (pfd);
124 } 97 }
125 }
126# endif
127#endif
128 98
129#ifdef PTYS_ARE_PTC 99 return -1;
130 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)
131 { 114 {
132 *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)
133 return pfd; 132 return pfd;
133
134 return -1;
134 } 135 }
135#endif
136 136
137#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
138 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 144 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
139 {
140 *ttydev = strdup (ptsname (pfd));
141 return pfd;
142 }
143#endif
144
145#ifdef PTYS_ARE_NUMERIC
146 {
147 int idx;
148 char *c1, *c2;
149 char pty_name[] = "/dev/ptyp???";
150 char tty_name[] = "/dev/ttyp???";
151
152 c1 = &(pty_name[sizeof (pty_name) - 4]);
153 c2 = &(tty_name[sizeof (tty_name) - 4]);
154 for (idx = 0; idx < 256; idx++)
155 { 145 {
156 sprintf (c1, "%d", idx); 146 *ttydev = strdup (ttyname (pfd));
157 sprintf (c2, "%d", idx); 147 return pfd;
158 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)
159 { 188 {
160 idx = 256; 189 snprintf(pty_name, 32, "/dev/ptyp%d", i);
161 break; 190 snprintf(tty_name, 32, "/dev/ttyp%d", i);
191 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
192 continue;
162 } 193 }
163 194
164 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 195 if (access (tty_name, R_OK | W_OK) == 0)
165 { 196 {
166 if (access (tty_name, R_OK | W_OK) == 0)
167 {
168 *ttydev = strdup (tty_name); 197 *ttydev = strdup (tty_name);
169 return pfd; 198 return pfd;
170 }
171
172 close (pfd);
173 } 199 }
200
201 close (pfd);
174 } 202 }
175 }
176#endif
177 203
178#ifdef PTYS_ARE_SEARCHED
179 {
180 const char *c1, *c2;
181 char pty_name[] = "/dev/pty??";
182 char tty_name[] = "/dev/tty??";
183
184# ifndef PTYCHAR1
185# define PTYCHAR1 "pqrstuvwxyz"
186# endif
187# ifndef PTYCHAR2
188# define PTYCHAR2 "0123456789abcdef"
189# endif
190
191 for (c1 = PTYCHAR1; *c1; c1++)
192 {
193 pty_name[ (sizeof (pty_name) - 3)] =
194 tty_name[ (sizeof (pty_name) - 3)] = *c1;
195 for (c2 = PTYCHAR2; *c2; c2++)
196 {
197 pty_name[ (sizeof (pty_name) - 2)] =
198 tty_name[ (sizeof (pty_name) - 2)] = *c2;
199 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
200 {
201 if (access (tty_name, R_OK | W_OK) == 0)
202 {
203 *ttydev = strdup (tty_name);
204 return pfd;
205 }
206
207 close (pfd);
208 }
209 }
210 }
211 }
212#endif
213
214 return -1; 204 return -1;
215} 205 }
206
207#endif
216 208
217/*----------------------------------------------------------------------*/ 209/*----------------------------------------------------------------------*/
218/* 210/*
219 * Returns tty file descriptor, or -1 on failure 211 * Returns tty file descriptor, or -1 on failure
220 */ 212 */
221static int 213static int
222get_tty (char *ttydev) 214get_tty (char *ttydev)
223{ 215{
224 return open (ttydev, O_RDWR | O_NOCTTY, 0); 216 return open (ttydev, O_RDWR | O_NOCTTY, 0);
… …
227/*----------------------------------------------------------------------*/ 219/*----------------------------------------------------------------------*/
228/* 220/*
229 * 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
230 */ 222 */
231static int 223static int
232control_tty (int fd_tty, const char *ttydev) 224control_tty (int fd_tty)
233{ 225{
234#ifndef __QNX__
235 int fd; 226 int fd;
236 227
237 /* ---------------------------------------- */
238# ifdef HAVE_SETSID
239 setsid (); 228 setsid ();
240# endif
241# if defined(HAVE_SETPGID)
242 setpgid (0, 0);
243# elif defined(HAVE_SETPGRP)
244 setpgrp (0, 0);
245# endif
246 229
247 /* ---------------------------------------- */
248# ifdef TIOCNOTTY
249 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
250 if (fd >= 0)
251 {
252 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
253 close (fd);
254 }
255# endif
256
257 /* ---------------------------------------- */
258 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
259 if (fd >= 0)
260 close (fd); /* ouch: still have controlling tty */
261
262 /* ---------------------------------------- */
263#if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 230#if defined(HAVE_DEV_PTMX) && defined(I_PUSH)
264 /* 231 /*
265 * Push STREAMS modules: 232 * Push STREAMS modules:
266 * ptem: pseudo-terminal hardware emulation module. 233 * ptem: pseudo-terminal hardware emulation module.
267 * ldterm: standard terminal line discipline. 234 * ldterm: standard terminal line discipline.
268 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 235 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
… …
285 ioctl (fd_tty, I_PUSH, "ptem"); 252 ioctl (fd_tty, I_PUSH, "ptem");
286 ioctl (fd_tty, I_PUSH, "ldterm"); 253 ioctl (fd_tty, I_PUSH, "ldterm");
287 ioctl (fd_tty, I_PUSH, "ttcompat"); 254 ioctl (fd_tty, I_PUSH, "ttcompat");
288 } 255 }
289#endif 256#endif
290 /* ---------------------------------------- */ 257
291# if defined(TIOCSCTTY) 258#ifdef TIOCSCTTY
292 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 259 ioctl (fd_tty, TIOCSCTTY, NULL);
293# elif defined(TIOCSETCTTY)
294 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
295# else 260#else
296 fd = open (ttydev, O_RDWR); 261 fd = open (ttyname (fd_tty), O_RDWR);
297 if (fd >= 0) 262 if (fd >= 0)
298 close (fd); 263 close (fd);
299# endif 264#endif
300 /* ---------------------------------------- */ 265
301 fd = open ("/dev/tty", O_WRONLY); 266 fd = open ("/dev/tty", O_WRONLY);
302 if (fd < 0) 267 if (fd < 0)
303 return -1; /* fatal */ 268 return -1; /* fatal */
269
304 close (fd); 270 close (fd);
305 /* ---------------------------------------- */
306#endif /* ! __QNX__ */
307 271
308 return 0; 272 return 0;
309} 273}
310 274
311#ifndef NO_SETOWNER_TTYDEV 275void
276ptytty::close_tty ()
277{
278 if (tty < 0)
279 return;
280
281 close (tty);
282 tty = -1;
283}
284
285bool
286ptytty::make_controlling_tty ()
287{
288 return control_tty (tty) >= 0;
289}
290
291void
292ptytty::set_utf8_mode (bool on)
293{
294#ifdef IUTF8
295 if (pty < 0)
296 return;
297
298 struct termios tio;
299
300 if (tcgetattr (pty, &tio) != -1)
301 {
302 tcflag_t new_cflag = tio.c_iflag;
303
304 if (on)
305 new_cflag |= IUTF8;
306 else
307 new_cflag &= ~IUTF8;
308
309 if (new_cflag != tio.c_iflag)
310 {
311 tio.c_iflag = new_cflag;
312 tcsetattr (pty, TCSANOW, &tio);
313 }
314 }
315#endif
316}
317
312static struct ttyconf { 318static struct ttyconf {
313 gid_t gid; 319 gid_t gid;
314 mode_t mode; 320 mode_t mode;
315 321
316 ttyconf () 322 ttyconf ()
… …
325 } 331 }
326 else 332 else
327#endif /* TTY_GID_SUPPORT */ 333#endif /* TTY_GID_SUPPORT */
328 { 334 {
329 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; 335 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
330 gid = getgid (); 336 gid = 0;
331 } 337 }
332 } 338 }
333} ttyconf; 339} ttyconf;
334 340
341ptytty_unix::ptytty_unix ()
342{
343 name = 0;
344#if UTMP_SUPPORT
345 cmd_pid = 0;
346#endif
347}
348
349ptytty_unix::~ptytty_unix ()
350{
351#if UTMP_SUPPORT
352 logout ();
353#endif
354 put ();
355}
356
335void 357void
336rxvt_ptytty::privileges (rxvt_privaction action) 358ptytty_unix::put ()
337{ 359{
338 if (!name || !*name) 360 if (name)
339 return;
340
341 rxvt_privileges (RESTORE);
342
343 if (action == SAVE)
344 { 361 {
345# ifndef RESET_TTY_TO_COMMON_DEFAULTS 362 chmod (name, RESTORE_TTY_MODE);
346 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
347 if (lstat (name, &savestat) < 0) /* you lose out */
348 ;
349 else
350# endif
351 {
352 saved = true;
353 chown (name, getuid (), ttyconf.gid); /* fail silently */
354 chmod (name, ttyconf.mode); 363 chown (name, 0, ttyconf.gid);
355# ifdef HAVE_REVOKE
356 revoke (name);
357# endif
358 }
359 } 364 }
360 else
361 { /* action == RESTORE */
362# ifndef RESET_TTY_TO_COMMON_DEFAULTS
363 if (saved)
364 {
365 chmod (name, savestat.st_mode);
366 chown (name, savestat.st_uid, savestat.st_gid);
367 }
368# else
369 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
370 chown (name, 0, 0);
371# endif
372 365
373 } 366 close_tty ();
374 367
375 rxvt_privileges (IGNORE); 368 if (pty >= 0)
376} 369 close (pty);
377#endif
378 370
379rxvt_ptytty::rxvt_ptytty () 371 free (name);
380{ 372
381 pty = tty = -1; 373 pty = tty = -1;
382 name = 0; 374 name = 0;
383#ifndef NO_SETOWNER_TTYDEV
384 saved = false;
385#endif
386}
387
388rxvt_ptytty::~rxvt_ptytty ()
389{
390 put ();
391}
392
393void
394
395rxvt_ptytty::close_tty ()
396{
397 if (tty >= 0) close (tty);
398 tty = -1;
399}
400
401void
402rxvt_ptytty::put ()
403{
404#ifndef NO_SETOWNER_TTYDEV
405 if (tty >= 0)
406 privileges (RESTORE);
407#endif
408
409 if (pty >= 0) close (pty);
410 close_tty ();
411 free (name);
412
413 pty = tty = -1;
414 name = 0;
415} 375}
416 376
417bool 377bool
418rxvt_ptytty::make_controlling_tty () 378ptytty_unix::get ()
419{
420 return control_tty (tty, name) >= 0;
421}
422
423bool
424rxvt_ptytty::get ()
425{ 379{
426 /* get master (pty) */ 380 /* get master (pty) */
427 if ((pty = get_pty (&tty, &name)) < 0) 381 if ((pty = get_pty (&tty, &name)) < 0)
428 return false; 382 return false;
429 383
… …
431 385
432 /* get slave (tty) */ 386 /* get slave (tty) */
433 if (tty < 0) 387 if (tty < 0)
434 { 388 {
435#ifndef NO_SETOWNER_TTYDEV 389#ifndef NO_SETOWNER_TTYDEV
436 privileges (SAVE); 390 chown (name, getuid (), ttyconf.gid); /* fail silently */
391 chmod (name, ttyconf.mode);
392# ifdef HAVE_REVOKE
393 revoke (name);
394# endif
437#endif 395#endif
438 396
439 if ((tty = get_tty (name)) < 0) 397 if ((tty = get_tty (name)) < 0)
440 { 398 {
441 put (); 399 put ();
… …
444 } 402 }
445 403
446 return true; 404 return true;
447} 405}
448 406
449void
450rxvt_ptytty::set_utf8_mode (bool on)
451{
452#ifdef IUTF8
453 if (pty != -1)
454 {
455 struct termios tio;
456
457 if (tcgetattr (pty, &tio) != -1)
458 {
459 tcflag_t new_cflag = tio.c_iflag;
460
461 if (on)
462 new_cflag |= IUTF8;
463 else
464 new_cflag &= ~IUTF8;
465
466 if (new_cflag != tio.c_iflag)
467 {
468 tio.c_iflag = new_cflag;
469 tcsetattr (pty, TCSANOW, &tio);
470 }
471 }
472 }
473#endif
474}
475
476/*----------------------- end-of-file (C source) -----------------------*/
477

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