ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/rxvt-unicode/src/ptytty.C
(Generate patch)

Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.31 by root, Tue Jan 10 18:09:22 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# 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
33#ifdef HAVE_UNISTD_H
34# include <unistd.h> 37#include <unistd.h>
35#endif
36#ifdef HAVE_FCNTL_H
37# include <fcntl.h> 38#include <fcntl.h>
38#endif 39
39#ifdef HAVE_SYS_IOCTL_H 40#ifdef HAVE_SYS_IOCTL_H
40# include <sys/ioctl.h> 41# include <sys/ioctl.h>
41#endif 42#endif
42#if defined(PTYS_ARE_PTMX) && defined(HAVE_SYS_STROPTS_H) 43#if defined(HAVE_DEV_PTMX) && defined(HAVE_SYS_STROPTS_H)
43# include <sys/stropts.h> /* for I_PUSH */ 44# include <sys/stropts.h> /* for I_PUSH */
44#endif 45#endif
45#ifdef HAVE_ISASTREAM 46#ifdef HAVE_ISASTREAM
46# include <stropts.h> 47# include <stropts.h>
47#endif 48#endif
… …
50#elif defined(HAVE_LIBUTIL_H) 51#elif defined(HAVE_LIBUTIL_H)
51# include <libutil.h> 52# include <libutil.h>
52#elif defined(HAVE_UTIL_H) 53#elif defined(HAVE_UTIL_H)
53# include <util.h> 54# include <util.h>
54#endif 55#endif
56#ifdef TTY_GID_SUPPORT
57#include <grp.h>
58#endif
55 59
56#include <cstdio> 60#include <cstdio>
57#include <grp.h> 61
62/////////////////////////////////////////////////////////////////////////////
58 63
59/* ------------------------------------------------------------------------- * 64/* ------------------------------------------------------------------------- *
60 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 65 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
61 * ------------------------------------------------------------------------- */ 66 * ------------------------------------------------------------------------- */
62/* 67/*
63 * Returns pty file descriptor, or -1 on failure 68 * Returns pty file descriptor, or -1 on failure
64 * 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.
65 * 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
66 */ 71 */
72#if defined(UNIX98_PTY)
67static int 73static int
68get_pty (int *fd_tty, char **ttydev) 74get_pty (int *fd_tty, char **ttydev)
69{ 75{
70 int pfd; 76 int pfd;
71 77
72#ifdef PTYS_ARE_OPENPTY 78# if defined(HAVE_GETPT)
73 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 }
74 93
75 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
76 int res = openpty (&pfd, fd_tty, tty_name, NULL, NULL); 107 res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
77 rxvt_privileges(IGNORE);
78
79 if (res != -1) 108 if (res != -1)
80 { 109 {
81 *ttydev = strdup (tty_name); 110 *ttydev = strdup (tty_name);
82 return pfd; 111 return pfd;
83 } 112 }
84#endif
85 113
86#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
87 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); 122 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
88 if (*ttydev != NULL) 123 if (*ttydev != NULL)
89 return pfd; 124 return pfd;
90#endif
91 125
92#ifdef PTYS_ARE_GETPTY 126 return -1;
93 char *ptydev; 127}
128#elif defined(HAVE_DEV_PTC)
129static int
130get_pty (int *fd_tty, char **ttydev)
131{
132 int pfd;
94 133
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 ();
109# else
110 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
111# endif
112
113 if (pfd >= 0)
114 {
115 if (grantpt (pfd) == 0 /* change slave permissions */
116 && unlockpt (pfd) == 0)
117 { /* slave now unlocked */
118 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
119 return pfd;
120 }
121 close (pfd);
122 }
123 }
124# endif
125#endif
126
127#ifdef PTYS_ARE_PTC
128 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) 134 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
129 { 135 {
130 *ttydev = strdup (ttyname (pfd)); 136 *ttydev = strdup (ttyname (pfd));
131 return pfd; 137 return pfd;
132 } 138 }
133#endif
134 139
135#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
136 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)
137 { 149 {
138 *ttydev = strdup (ptsname (pfd)); 150 *ttydev = strdup (ptsname (pfd));
139 return pfd; 151 return pfd;
140 } 152 }
141#endif
142 153
143#ifdef PTYS_ARE_NUMERIC 154 return -1;
144 { 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;
145 int idx; 162 int i;
146 char *c1, *c2; 163 char pty_name[32];
147 char pty_name[] = "/dev/ptyp???"; 164 char tty_name[32];
148 char tty_name[] = "/dev/ttyp???"; 165 const char *majors = "pqrstuvwxyzabcde";
149 166 const char *minors = "0123456789abcdef";
150 c1 = &(pty_name[sizeof (pty_name) - 4]);
151 c2 = &(tty_name[sizeof (tty_name) - 4]);
152 for (idx = 0; idx < 256; idx++) 167 for (i = 0; i < 256; i++)
153 { 168 {
154 sprintf (c1, "%d", idx); 169 snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]);
155 sprintf (c2, "%d", idx); 170 snprintf(tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]);
156 if (access (tty_name, F_OK) < 0)
157 {
158 idx = 256;
159 break;
160 }
161
162 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 171 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
163 { 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 }
164 if (access (tty_name, R_OK | W_OK) == 0) 178 if (access (tty_name, R_OK | W_OK) == 0)
165 { 179 {
166 *ttydev = strdup (tty_name); 180 *ttydev = strdup (tty_name);
167 return pfd; 181 return pfd;
168 }
169
170 close (pfd);
171 } 182 }
183
184 close (pfd);
172 } 185 }
173 }
174#endif
175 186
176#ifdef PTYS_ARE_SEARCHED 187 return -1;
177 { 188}
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 189#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;
213}
214 190
215/*----------------------------------------------------------------------*/ 191/*----------------------------------------------------------------------*/
216/* 192/*
217 * Returns tty file descriptor, or -1 on failure 193 * Returns tty file descriptor, or -1 on failure
218 */ 194 */
… …
225/*----------------------------------------------------------------------*/ 201/*----------------------------------------------------------------------*/
226/* 202/*
227 * 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
228 */ 204 */
229static int 205static int
230control_tty (int fd_tty, const char *ttydev) 206control_tty (int fd_tty)
231{ 207{
232#ifndef __QNX__
233 int fd;
234
235 /* ---------------------------------------- */
236# ifdef HAVE_SETSID
237 setsid (); 208 setsid ();
238# endif
239# if defined(HAVE_SETPGID)
240 setpgid (0, 0);
241# elif defined(HAVE_SETPGRP)
242 setpgrp (0, 0);
243# endif
244 209
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) 210#if defined(HAVE_DEV_PTMX) && defined(I_PUSH)
262 /* 211 /*
263 * Push STREAMS modules: 212 * Push STREAMS modules:
264 * ptem: pseudo-terminal hardware emulation module. 213 * ptem: pseudo-terminal hardware emulation module.
265 * ldterm: standard terminal line discipline. 214 * ldterm: standard terminal line discipline.
266 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 215 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
… …
283 ioctl (fd_tty, I_PUSH, "ptem"); 232 ioctl (fd_tty, I_PUSH, "ptem");
284 ioctl (fd_tty, I_PUSH, "ldterm"); 233 ioctl (fd_tty, I_PUSH, "ldterm");
285 ioctl (fd_tty, I_PUSH, "ttcompat"); 234 ioctl (fd_tty, I_PUSH, "ttcompat");
286 } 235 }
287#endif 236#endif
288 /* ---------------------------------------- */ 237
289# if defined(TIOCSCTTY)
290 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 238 ioctl (fd_tty, TIOCSCTTY, NULL);
291# elif defined(TIOCSETCTTY) 239
292 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
293# else
294 fd = open (ttydev, O_RDWR);
295 if (fd >= 0)
296 close (fd);
297# endif
298 /* ---------------------------------------- */
299 fd = open ("/dev/tty", O_WRONLY); 240 int fd = open ("/dev/tty", O_WRONLY);
300 if (fd < 0) 241 if (fd < 0)
301 return -1; /* fatal */ 242 return -1; /* fatal */
243
302 close (fd); 244 close (fd);
303 /* ---------------------------------------- */
304#endif /* ! __QNX__ */
305 245
306 return 0; 246 return 0;
307} 247}
308 248
309#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
310static struct ttyconf { 292static struct ttyconf {
311 gid_t gid; 293 gid_t gid;
312 mode_t mode; 294 mode_t mode;
313 295
314 ttyconf () 296 ttyconf ()
… …
323 } 305 }
324 else 306 else
325#endif /* TTY_GID_SUPPORT */ 307#endif /* TTY_GID_SUPPORT */
326 { 308 {
327 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; 309 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
328 gid = getgid (); 310 gid = 0;
329 } 311 }
330 } 312 }
331} ttyconf; 313} ttyconf;
332 314
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
333void 331void
334rxvt_ptytty::privileges (rxvt_privaction action) 332ptytty_unix::put ()
335{ 333{
336 if (!name || !*name) 334 chmod (name, RESTORE_TTY_MODE);
337 return; 335 chown (name, 0, ttyconf.gid);
338 336
339 rxvt_privileges (RESTORE); 337 close_tty ();
340 338
341 if (action == SAVE) 339 if (pty >= 0)
342 { 340 close (pty);
343# ifndef RESET_TTY_TO_COMMON_DEFAULTS
344 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
345 if (lstat (name, &savestat) < 0) /* you lose out */
346 ;
347 else
348# endif
349 {
350 saved = true;
351 chown (name, getuid (), ttyconf.gid); /* fail silently */
352 chmod (name, ttyconf.mode);
353# ifdef HAVE_REVOKE
354 revoke (name);
355# endif
356 }
357 }
358 else
359 { /* action == RESTORE */
360# ifndef RESET_TTY_TO_COMMON_DEFAULTS
361 if (saved)
362 {
363 chmod (name, savestat.st_mode);
364 chown (name, savestat.st_uid, savestat.st_gid);
365 }
366# else
367 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
368 chown (name, 0, 0);
369# endif
370 341
371 } 342 free (name);
372 343
373 rxvt_privileges (IGNORE);
374}
375#endif
376
377rxvt_ptytty::rxvt_ptytty ()
378{
379 pty = tty = -1; 344 pty = tty = -1;
380 name = 0; 345 name = 0;
381#ifndef NO_SETOWNER_TTYDEV
382 saved = false;
383#endif
384}
385
386rxvt_ptytty::~rxvt_ptytty ()
387{
388 put ();
389}
390
391void
392
393rxvt_ptytty::close_tty ()
394{
395 if (tty < 0)
396 return;
397
398 close (tty);
399 tty = -1;
400}
401
402void
403rxvt_ptytty::put ()
404{
405#ifndef NO_SETOWNER_TTYDEV
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} 346}
416 347
417bool 348bool
418rxvt_ptytty::make_controlling_tty () 349ptytty_unix::get ()
419{
420 return control_tty (tty, name) >= 0;
421}
422
423bool
424rxvt_ptytty::get ()
425{ 350{
426 /* get master (pty) */ 351 /* get master (pty) */
427 if ((pty = get_pty (&tty, &name)) < 0) 352 if ((pty = get_pty (&tty, &name)) < 0)
428 return false; 353 return false;
429 354
… …
431 356
432 /* get slave (tty) */ 357 /* get slave (tty) */
433 if (tty < 0) 358 if (tty < 0)
434 { 359 {
435#ifndef NO_SETOWNER_TTYDEV 360#ifndef NO_SETOWNER_TTYDEV
436 privileges (SAVE); 361 chown (name, getuid (), ttyconf.gid); /* fail silently */
362 chmod (name, ttyconf.mode);
363# ifdef HAVE_REVOKE
364 revoke (name);
365# endif
437#endif 366#endif
438 367
439 if ((tty = get_tty (name)) < 0) 368 if ((tty = get_tty (name)) < 0)
440 { 369 {
441 put (); 370 put ();
… …
444 } 373 }
445 374
446 return true; 375 return true;
447} 376}
448 377
449void
450rxvt_ptytty::set_utf8_mode (bool on)
451{
452#ifdef IUTF8
453 if (pty < 0)
454 return;
455
456 struct termios tio;
457
458 if (tcgetattr (pty, &tio) != -1)
459 {
460 tcflag_t new_cflag = tio.c_iflag;
461
462 if (on)
463 new_cflag |= IUTF8;
464 else
465 new_cflag &= ~IUTF8;
466
467 if (new_cflag != tio.c_iflag)
468 {
469 tio.c_iflag = new_cflag;
470 tcsetattr (pty, TCSANOW, &tio);
471 }
472 }
473#endif
474}
475
476/*----------------------- end-of-file (C source) -----------------------*/
477

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines