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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.30 by root, Fri Jan 6 05:37:59 2006 UTC vs.
Revision 1.62 by ayin, Mon Sep 11 08:48:37 2006 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 <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)
73static int 73static int
74get_pty (int *fd_tty, char **ttydev) 74get_pty (int *fd_tty, char **ttydev)
75{ 75{
76 int pfd; 76 int pfd;
77 77
78#ifdef PTYS_ARE_OPENPTY 78# if defined(HAVE_GETPT)
79 char tty_name[sizeof "/dev/pts/????\0"]; 79 pfd = getpt();
80# elif defined(HAVE_POSIX_OPENPT)
81 pfd = posix_openpt (O_RDWR);
82# else
83 pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0);
84# endif
85 if (pfd >= 0)
86 {
87 if (grantpt (pfd) == 0 /* change slave permissions */
88 && unlockpt (pfd) == 0)
89 { /* slave now unlocked */
90 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
91 return pfd;
92 }
80 93
81 rxvt_privileges(RESTORE); 94 close (pfd);
95 }
96
97 return -1;
98}
99#elif defined(HAVE_OPENPTY)
100static int
101get_pty (int *fd_tty, char **ttydev)
102{
103 int pfd;
104 int res;
105 char tty_name[32];
106
82 int res = openpty (&pfd, fd_tty, tty_name, NULL, NULL); 107 res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
83 rxvt_privileges(IGNORE);
84
85 if (res != -1) 108 if (res != -1)
86 { 109 {
87 *ttydev = strdup (tty_name); 110 *ttydev = strdup (tty_name);
88 return pfd; 111 return pfd;
89 } 112 }
90#endif
91 113
92#ifdef PTYS_ARE__GETPTY 114 return -1;
115}
116#elif defined(HAVE__GETPTY)
117static int
118get_pty (int *fd_tty, char **ttydev)
119{
120 int pfd;
121
93 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); 122 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
94 if (*ttydev != NULL) 123 if (*ttydev != NULL)
95 return pfd; 124 return pfd;
96#endif
97 125
98#ifdef PTYS_ARE_GETPTY 126 return -1;
99 char *ptydev; 127}
128#elif defined(HAVE_DEV_PTC)
129static int
130get_pty (int *fd_tty, char **ttydev)
131{
132 int pfd;
100 133
101 while ((ptydev = getpty ()) != NULL)
102 if ((pfd = open (ptydev, O_RDWR | O_NOCTTY, 0)) >= 0)
103 {
104 *ttydev = ptydev;
105 return pfd;
106 }
107#endif
108
109#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
110# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_PTMX)
111
112 {
113# ifdef PTYS_ARE_GETPT
114 pfd = getpt ();
115# else
116 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
117# endif
118
119 if (pfd >= 0)
120 {
121 if (grantpt (pfd) == 0 /* change slave permissions */
122 && unlockpt (pfd) == 0)
123 { /* slave now unlocked */
124 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
125 return pfd;
126 }
127 close (pfd);
128 }
129 }
130# endif
131#endif
132
133#ifdef PTYS_ARE_PTC
134 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) 134 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
135 { 135 {
136 *ttydev = strdup (ttyname (pfd)); 136 *ttydev = strdup (ttyname (pfd));
137 return pfd; 137 return pfd;
138 } 138 }
139#endif
140 139
141#ifdef PTYS_ARE_CLONE 140 return -1;
141}
142#elif defined(HAVE_DEV_CLONE)
143static int
144get_pty (int *fd_tty, char **ttydev)
145{
146 int pfd;
147
142 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 148 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
143 { 149 {
144 *ttydev = strdup (ptsname (pfd)); 150 *ttydev = strdup (ptsname (pfd));
145 return pfd; 151 return pfd;
146 } 152 }
147#endif
148 153
149#ifdef PTYS_ARE_NUMERIC 154 return -1;
150 { 155}
156#else
157/* Based on the code in openssh/openbsd-compat/bsd-openpty.c */
158static int
159get_pty (int *fd_tty, char **ttydev)
160{
161 int pfd;
151 int idx; 162 int i;
152 char *c1, *c2; 163 char pty_name[32];
153 char pty_name[] = "/dev/ptyp???"; 164 char tty_name[32];
154 char tty_name[] = "/dev/ttyp???"; 165 const char *majors = "pqrstuvwxyzabcde";
155 166 const char *minors = "0123456789abcdef";
156 c1 = &(pty_name[sizeof (pty_name) - 4]);
157 c2 = &(tty_name[sizeof (tty_name) - 4]);
158 for (idx = 0; idx < 256; idx++) 167 for (i = 0; i < 256; i++)
159 { 168 {
160 sprintf (c1, "%d", idx); 169 snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]);
161 sprintf (c2, "%d", idx); 170 snprintf(tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]);
162 if (access (tty_name, F_OK) < 0)
163 {
164 idx = 256;
165 break;
166 }
167
168 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 171 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
169 { 172 {
173 snprintf(pty_name, 32, "/dev/ptyp%d", i);
174 snprintf(tty_name, 32, "/dev/ttyp%d", i);
175 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
176 continue;
177 }
170 if (access (tty_name, R_OK | W_OK) == 0) 178 if (access (tty_name, R_OK | W_OK) == 0)
171 { 179 {
172 *ttydev = strdup (tty_name); 180 *ttydev = strdup (tty_name);
173 return pfd; 181 return pfd;
174 }
175
176 close (pfd);
177 } 182 }
183
184 close (pfd);
178 } 185 }
179 }
180#endif
181 186
182#ifdef PTYS_ARE_SEARCHED 187 return -1;
183 { 188}
184 const char *c1, *c2;
185 char pty_name[] = "/dev/pty??";
186 char tty_name[] = "/dev/tty??";
187
188# ifndef PTYCHAR1
189# define PTYCHAR1 "pqrstuvwxyz"
190# endif 189#endif
191# ifndef PTYCHAR2
192# define PTYCHAR2 "0123456789abcdef"
193# endif
194
195 for (c1 = PTYCHAR1; *c1; c1++)
196 {
197 pty_name[ (sizeof (pty_name) - 3)] =
198 tty_name[ (sizeof (pty_name) - 3)] = *c1;
199 for (c2 = PTYCHAR2; *c2; c2++)
200 {
201 pty_name[ (sizeof (pty_name) - 2)] =
202 tty_name[ (sizeof (pty_name) - 2)] = *c2;
203 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
204 {
205 if (access (tty_name, R_OK | W_OK) == 0)
206 {
207 *ttydev = strdup (tty_name);
208 return pfd;
209 }
210
211 close (pfd);
212 }
213 }
214 }
215 }
216#endif
217
218 return -1;
219}
220 190
221/*----------------------------------------------------------------------*/ 191/*----------------------------------------------------------------------*/
222/* 192/*
223 * Returns tty file descriptor, or -1 on failure 193 * Returns tty file descriptor, or -1 on failure
224 */ 194 */
… …
231/*----------------------------------------------------------------------*/ 201/*----------------------------------------------------------------------*/
232/* 202/*
233 * Make our tty a controlling tty so that /dev/tty points to us 203 * Make our tty a controlling tty so that /dev/tty points to us
234 */ 204 */
235static int 205static int
236control_tty (int fd_tty, const char *ttydev) 206control_tty (int fd_tty)
237{ 207{
238#ifndef __QNX__
239 int fd;
240
241 /* ---------------------------------------- */
242# ifdef HAVE_SETSID
243 setsid (); 208 setsid ();
244# endif
245# if defined(HAVE_SETPGID)
246 setpgid (0, 0);
247# elif defined(HAVE_SETPGRP)
248 setpgrp (0, 0);
249# endif
250 209
251 /* ---------------------------------------- */
252# ifdef TIOCNOTTY
253 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
254 if (fd >= 0)
255 {
256 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
257 close (fd);
258 }
259# endif
260
261 /* ---------------------------------------- */
262 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
263 if (fd >= 0)
264 close (fd); /* ouch: still have controlling tty */
265
266 /* ---------------------------------------- */
267#if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 210#if defined(HAVE_DEV_PTMX) && defined(I_PUSH)
268 /* 211 /*
269 * Push STREAMS modules: 212 * Push STREAMS modules:
270 * ptem: pseudo-terminal hardware emulation module. 213 * ptem: pseudo-terminal hardware emulation module.
271 * ldterm: standard terminal line discipline. 214 * ldterm: standard terminal line discipline.
272 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 215 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
… …
289 ioctl (fd_tty, I_PUSH, "ptem"); 232 ioctl (fd_tty, I_PUSH, "ptem");
290 ioctl (fd_tty, I_PUSH, "ldterm"); 233 ioctl (fd_tty, I_PUSH, "ldterm");
291 ioctl (fd_tty, I_PUSH, "ttcompat"); 234 ioctl (fd_tty, I_PUSH, "ttcompat");
292 } 235 }
293#endif 236#endif
294 /* ---------------------------------------- */ 237
295# if defined(TIOCSCTTY)
296 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 238 ioctl (fd_tty, TIOCSCTTY, NULL);
297# elif defined(TIOCSETCTTY) 239
298 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
299# else
300 fd = open (ttydev, O_RDWR);
301 if (fd >= 0)
302 close (fd);
303# endif
304 /* ---------------------------------------- */
305 fd = open ("/dev/tty", O_WRONLY); 240 int fd = open ("/dev/tty", O_WRONLY);
306 if (fd < 0) 241 if (fd < 0)
307 return -1; /* fatal */ 242 return -1; /* fatal */
243
308 close (fd); 244 close (fd);
309 /* ---------------------------------------- */
310#endif /* ! __QNX__ */
311 245
312 return 0; 246 return 0;
313} 247}
314 248
315#ifndef NO_SETOWNER_TTYDEV 249void
250ptytty::close_tty ()
251{
252 if (tty < 0)
253 return;
254
255 close (tty);
256 tty = -1;
257}
258
259bool
260ptytty::make_controlling_tty ()
261{
262 return control_tty (tty) >= 0;
263}
264
265void
266ptytty::set_utf8_mode (bool on)
267{
268#ifdef IUTF8
269 if (pty < 0)
270 return;
271
272 struct termios tio;
273
274 if (tcgetattr (pty, &tio) != -1)
275 {
276 tcflag_t new_cflag = tio.c_iflag;
277
278 if (on)
279 new_cflag |= IUTF8;
280 else
281 new_cflag &= ~IUTF8;
282
283 if (new_cflag != tio.c_iflag)
284 {
285 tio.c_iflag = new_cflag;
286 tcsetattr (pty, TCSANOW, &tio);
287 }
288 }
289#endif
290}
291
316static struct ttyconf { 292static struct ttyconf {
317 gid_t gid; 293 gid_t gid;
318 mode_t mode; 294 mode_t mode;
319 295
320 ttyconf () 296 ttyconf ()
… …
329 } 305 }
330 else 306 else
331#endif /* TTY_GID_SUPPORT */ 307#endif /* TTY_GID_SUPPORT */
332 { 308 {
333 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; 309 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
334 gid = getgid (); 310 gid = 0;
335 } 311 }
336 } 312 }
337} ttyconf; 313} ttyconf;
338 314
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
339void 331void
340rxvt_ptytty::privileges (rxvt_privaction action) 332ptytty_unix::put ()
341{ 333{
342 if (!name || !*name) 334 chmod (name, RESTORE_TTY_MODE);
343 return; 335 chown (name, 0, ttyconf.gid);
344 336
345 rxvt_privileges (RESTORE); 337 close_tty ();
346 338
347 if (action == SAVE) 339 if (pty >= 0)
348 { 340 close (pty);
349# ifndef RESET_TTY_TO_COMMON_DEFAULTS
350 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
351 if (lstat (name, &savestat) < 0) /* you lose out */
352 ;
353 else
354# endif
355 {
356 saved = true;
357 chown (name, getuid (), ttyconf.gid); /* fail silently */
358 chmod (name, ttyconf.mode);
359# ifdef HAVE_REVOKE
360 revoke (name);
361# endif
362 }
363 }
364 else
365 { /* action == RESTORE */
366# ifndef RESET_TTY_TO_COMMON_DEFAULTS
367 if (saved)
368 {
369 chmod (name, savestat.st_mode);
370 chown (name, savestat.st_uid, savestat.st_gid);
371 }
372# else
373 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
374 chown (name, 0, 0);
375# endif
376 341
377 } 342 free (name);
378 343
379 rxvt_privileges (IGNORE);
380}
381#endif
382
383rxvt_ptytty::rxvt_ptytty ()
384{
385 pty = tty = -1; 344 pty = tty = -1;
386 name = 0; 345 name = 0;
387#ifndef NO_SETOWNER_TTYDEV
388 saved = false;
389#endif
390}
391
392rxvt_ptytty::~rxvt_ptytty ()
393{
394 put ();
395}
396
397void
398
399rxvt_ptytty::close_tty ()
400{
401 if (tty < 0)
402 return;
403
404 close (tty);
405 tty = -1;
406}
407
408void
409rxvt_ptytty::put ()
410{
411#ifndef NO_SETOWNER_TTYDEV
412 privileges (RESTORE);
413#endif
414
415 if (pty >= 0) close (pty);
416 close_tty ();
417 free (name);
418
419 pty = tty = -1;
420 name = 0;
421} 346}
422 347
423bool 348bool
424rxvt_ptytty::make_controlling_tty () 349ptytty_unix::get ()
425{
426 return control_tty (tty, name) >= 0;
427}
428
429bool
430rxvt_ptytty::get ()
431{ 350{
432 /* get master (pty) */ 351 /* get master (pty) */
433 if ((pty = get_pty (&tty, &name)) < 0) 352 if ((pty = get_pty (&tty, &name)) < 0)
434 return false; 353 return false;
435 354
… …
437 356
438 /* get slave (tty) */ 357 /* get slave (tty) */
439 if (tty < 0) 358 if (tty < 0)
440 { 359 {
441#ifndef NO_SETOWNER_TTYDEV 360#ifndef NO_SETOWNER_TTYDEV
442 privileges (SAVE); 361 chown (name, getuid (), ttyconf.gid); /* fail silently */
362 chmod (name, ttyconf.mode);
363# ifdef HAVE_REVOKE
364 revoke (name);
365# endif
443#endif 366#endif
444 367
445 if ((tty = get_tty (name)) < 0) 368 if ((tty = get_tty (name)) < 0)
446 { 369 {
447 put (); 370 put ();
… …
450 } 373 }
451 374
452 return true; 375 return true;
453} 376}
454 377
455void
456rxvt_ptytty::set_utf8_mode (bool on)
457{
458#ifdef IUTF8
459 if (pty < 0)
460 return;
461
462 struct termios tio;
463
464 if (tcgetattr (pty, &tio) != -1)
465 {
466 tcflag_t new_cflag = tio.c_iflag;
467
468 if (on)
469 new_cflag |= IUTF8;
470 else
471 new_cflag &= ~IUTF8;
472
473 if (new_cflag != tio.c_iflag)
474 {
475 tio.c_iflag = new_cflag;
476 tcsetattr (pty, TCSANOW, &tio);
477 }
478 }
479#endif
480}
481
482/*----------------------- end-of-file (C source) -----------------------*/
483

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