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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 1.71 by root, Mon Feb 21 07:41:02 2011 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 <schmorp@schmorp.de>
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 37#include <sys/stat.h>
33#ifdef HAVE_UNISTD_H
34# include <unistd.h> 38#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> 39#include <fcntl.h>
41#endif 40
42#ifdef HAVE_SYS_IOCTL_H 41#ifdef HAVE_SYS_IOCTL_H
43# include <sys/ioctl.h> 42# include <sys/ioctl.h>
44#endif 43#endif
45#if defined(PTYS_ARE_PTMX) && defined(HAVE_SYS_STROPTS_H) 44#if defined(HAVE_DEV_PTMX) && defined(HAVE_SYS_STROPTS_H)
46# include <sys/stropts.h> /* for I_PUSH */ 45# include <sys/stropts.h> /* for I_PUSH */
47#endif 46#endif
48#ifdef HAVE_ISASTREAM 47#if defined(HAVE_ISASTREAM) && defined(HAVE_STROPTS_H)
49# include <stropts.h> 48# include <stropts.h>
50#endif 49#endif
51 50#if defined(HAVE_PTY_H)
52// better do this via configure, but.... 51# include <pty.h>
53#if defined(__FreeBSD__) 52#elif defined(HAVE_LIBUTIL_H)
54# include <libutil.h> 53# include <libutil.h>
55#elif defined(__DARWIN__) || (defined (__MACH__) && defined (__APPLE__)) 54#elif defined(HAVE_UTIL_H)
56# include <util.h> 55# include <util.h>
57#endif 56#endif
57#ifdef TTY_GID_SUPPORT
58#include <grp.h>
59#endif
58 60
59#include <cstdio> 61#include <cstdio>
60#include <grp.h> 62
63/////////////////////////////////////////////////////////////////////////////
61 64
62/* ------------------------------------------------------------------------- * 65/* ------------------------------------------------------------------------- *
63 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 66 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
64 * ------------------------------------------------------------------------- */ 67 * ------------------------------------------------------------------------- */
65/* 68/*
66 * Returns pty file descriptor, or -1 on failure 69 * Returns pty file descriptor, or -1 on failure
67 * If successful, ttydev is set to the name of the slave device. 70 * 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 71 * fd_tty _may_ also be set to an open fd to the slave device
69 */ 72 */
73#if defined(UNIX98_PTY)
74
70static int 75 static int
71get_pty (int *fd_tty, char **ttydev) 76 get_pty (int *fd_tty, char **ttydev)
72{
73 int pfd;
74
75#ifdef PTYS_ARE_OPENPTY
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 { 77 {
107# ifdef PTYS_ARE_GETPT 78 int pfd;
79
80# if defined(HAVE_GETPT)
108 pfd = getpt (); 81 pfd = getpt();
82# elif defined(HAVE_POSIX_OPENPT)
83 pfd = posix_openpt (O_RDWR);
109# else 84# else
110 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 85 pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0);
111# endif 86# endif
112 87
113 if (pfd >= 0) 88 if (pfd >= 0)
114 { 89 {
115 if (grantpt (pfd) == 0 /* change slave permissions */ 90 if (grantpt (pfd) == 0 /* change slave permissions */
116 && unlockpt (pfd) == 0) 91 && unlockpt (pfd) == 0)
92 {
117 { /* slave now unlocked */ 93 /* slave now unlocked */
118 *ttydev = strdup (ptsname (pfd)); /* get slave's name */ 94 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
119 return pfd; 95 return pfd;
120 } 96 }
97
121 close (pfd); 98 close (pfd);
122 } 99 }
100
101 return -1;
123 } 102 }
124# endif
125#endif
126 103
127#ifdef PTYS_ARE_PTC 104#elif defined(HAVE_OPENPTY)
128 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
129 {
130 *ttydev = strdup (ttyname (pfd));
131 return pfd;
132 }
133#endif
134 105
135#ifdef PTYS_ARE_CLONE 106 static int
136 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 107 get_pty (int *fd_tty, char **ttydev)
137 {
138 *ttydev = strdup (ptsname (pfd));
139 return pfd;
140 }
141#endif
142
143#ifdef PTYS_ARE_NUMERIC
144 { 108 {
145 int idx; 109 int pfd;
146 char *c1, *c2; 110 int res;
147 char pty_name[] = "/dev/ptyp???";
148 char tty_name[] = "/dev/ttyp???";
149 111
150 c1 = &(pty_name[sizeof (pty_name) - 4]); 112 res = openpty (&pfd, fd_tty, NULL, NULL, NULL);
151 c2 = &(tty_name[sizeof (tty_name) - 4]); 113
152 for (idx = 0; idx < 256; idx++) 114 if (res != -1)
153 { 115 {
154 sprintf (c1, "%d", idx); 116 *ttydev = strdup (ttyname (*fd_tty));
155 sprintf (c2, "%d", idx); 117 return pfd;
156 if (access (tty_name, F_OK) < 0) 118 }
119
120 return -1;
121 }
122
123#elif defined(HAVE__GETPTY)
124
125 static int
126 get_pty (int *fd_tty, char **ttydev)
127 {
128 int pfd;
129 char *slave;
130
131 slave = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
132
133 if (slave != NULL)
134 {
135 *ttydev = strdup (slave);
136 return pfd;
137 }
138
139 return -1;
140 }
141
142#else
143
144 /* Based on the code in openssh/openbsd-compat/bsd-openpty.c */
145 static int
146 get_pty (int *fd_tty, char **ttydev)
147 {
148 int pfd;
149 int i;
150 char pty_name[32];
151 char tty_name[32];
152 const char *majors = "pqrstuvwxyzabcde";
153 const char *minors = "0123456789abcdef";
154
155 for (i = 0; i < 256; i++)
156 {
157 snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]);
158 snprintf(tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]);
159
160 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
157 { 161 {
158 idx = 256; 162 snprintf(pty_name, 32, "/dev/ptyp%d", i);
159 break; 163 snprintf(tty_name, 32, "/dev/ttyp%d", i);
164 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
165 continue;
160 } 166 }
161 167
162 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 168 if (access (tty_name, R_OK | W_OK) == 0)
163 { 169 {
164 if (access (tty_name, R_OK | W_OK) == 0)
165 {
166 *ttydev = strdup (tty_name); 170 *ttydev = strdup (tty_name);
167 return pfd; 171 return pfd;
168 }
169
170 close (pfd);
171 } 172 }
173
174 close (pfd);
172 } 175 }
176
177 return -1;
173 } 178 }
174#endif
175 179
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 180#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}
214 181
215/*----------------------------------------------------------------------*/ 182/*----------------------------------------------------------------------*/
216/* 183/*
217 * Returns tty file descriptor, or -1 on failure 184 * Returns tty file descriptor, or -1 on failure
218 */ 185 */
219static int 186static int
220get_tty (char *ttydev) 187get_tty (char *ttydev)
221{ 188{
222 return open (ttydev, O_RDWR | O_NOCTTY, 0); 189 return open (ttydev, O_RDWR | O_NOCTTY, 0);
… …
225/*----------------------------------------------------------------------*/ 192/*----------------------------------------------------------------------*/
226/* 193/*
227 * Make our tty a controlling tty so that /dev/tty points to us 194 * Make our tty a controlling tty so that /dev/tty points to us
228 */ 195 */
229static int 196static int
230control_tty (int fd_tty, const char *ttydev) 197control_tty (int fd_tty)
231{ 198{
232#ifndef __QNX__
233 int fd; 199 int fd;
234 200
235 /* ---------------------------------------- */
236# ifdef HAVE_SETSID
237 setsid (); 201 setsid ();
238# endif
239# if defined(HAVE_SETPGID)
240 setpgid (0, 0);
241# elif defined(HAVE_SETPGRP)
242 setpgrp (0, 0);
243# endif
244 202
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) 203#if defined(HAVE_DEV_PTMX) && defined(I_PUSH)
262 /* 204 /*
263 * Push STREAMS modules: 205 * Push STREAMS modules:
264 * ptem: pseudo-terminal hardware emulation module. 206 * ptem: pseudo-terminal hardware emulation module.
265 * ldterm: standard terminal line discipline. 207 * ldterm: standard terminal line discipline.
266 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 208 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
… …
274 * documentation is really unclear about whether it is any close () on 216 * documentation is really unclear about whether it is any close () on
275 * the master side or the last close () - i.e. a proper STREAMS dismantling 217 * the master side or the last close () - i.e. a proper STREAMS dismantling
276 * close () - on the master side which causes a hang up to be sent 218 * close () - on the master side which causes a hang up to be sent
277 * through - Geoff Wing 219 * through - Geoff Wing
278 */ 220 */
279# ifdef HAVE_ISASTREAM 221#if defined(HAVE_ISASTREAM) && defined(HAVE_STROPTS_H)
280 if (isastream (fd_tty) == 1) 222 if (isastream (fd_tty) == 1)
281# endif 223# endif
282 { 224 {
283 ioctl (fd_tty, I_PUSH, "ptem"); 225 ioctl (fd_tty, I_PUSH, "ptem");
284 ioctl (fd_tty, I_PUSH, "ldterm"); 226 ioctl (fd_tty, I_PUSH, "ldterm");
285 ioctl (fd_tty, I_PUSH, "ttcompat"); 227 ioctl (fd_tty, I_PUSH, "ttcompat");
286 } 228 }
287#endif 229#endif
288 /* ---------------------------------------- */ 230
289# if defined(TIOCSCTTY) 231#ifdef TIOCSCTTY
290 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 232 ioctl (fd_tty, TIOCSCTTY, NULL);
291# elif defined(TIOCSETCTTY)
292 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
293# else 233#else
294 fd = open (ttydev, O_RDWR); 234 fd = open (ttyname (fd_tty), O_RDWR);
295 if (fd >= 0) 235 if (fd >= 0)
296 close (fd); 236 close (fd);
297# endif 237#endif
298 /* ---------------------------------------- */ 238
299 fd = open ("/dev/tty", O_WRONLY); 239 fd = open ("/dev/tty", O_WRONLY);
300 if (fd < 0) 240 if (fd < 0)
301 return -1; /* fatal */ 241 return -1; /* fatal */
242
302 close (fd); 243 close (fd);
303 /* ---------------------------------------- */
304#endif /* ! __QNX__ */
305 244
306 return 0; 245 return 0;
307} 246}
308 247
309#ifndef NO_SETOWNER_TTYDEV 248void
249ptytty::close_tty ()
250{
251 if (tty < 0)
252 return;
253
254 close (tty);
255 tty = -1;
256}
257
258bool
259ptytty::make_controlling_tty ()
260{
261 return control_tty (tty) >= 0;
262}
263
264void
265ptytty::set_utf8_mode (bool on)
266{
267#ifdef IUTF8
268 if (pty < 0)
269 return;
270
271 struct termios tio;
272
273 if (tcgetattr (pty, &tio) != -1)
274 {
275 tcflag_t new_cflag = tio.c_iflag;
276
277 if (on)
278 new_cflag |= IUTF8;
279 else
280 new_cflag &= ~IUTF8;
281
282 if (new_cflag != tio.c_iflag)
283 {
284 tio.c_iflag = new_cflag;
285 tcsetattr (pty, TCSANOW, &tio);
286 }
287 }
288#endif
289}
290
310static struct ttyconf { 291static struct ttyconf {
311 gid_t gid; 292 gid_t gid;
312 mode_t mode; 293 mode_t mode;
313 294
314 ttyconf () 295 ttyconf ()
315 { 296 {
316#ifdef TTY_GID_SUPPORT 297#ifdef TTY_GID_SUPPORT
317 struct group *gr = getgrnam ("tty"); 298 struct group *gr = getgrnam ("tty");
318 299
319 if (gr) 300 if (gr)
301 {
320 { /* change group ownership of tty to "tty" */ 302 /* change group ownership of tty to "tty" */
321 mode = S_IRUSR | S_IWUSR | S_IWGRP; 303 mode = S_IRUSR | S_IWUSR | S_IWGRP;
322 gid = gr->gr_gid; 304 gid = gr->gr_gid;
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 rxvt_privileges (RESTORE); 334 if (name)
337
338 if (action == SAVE)
339 {
340 //next_tty_action = RESTORE;
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 } 335 {
357 else 336 chmod (name, RESTORE_TTY_MODE);
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); 337 chown (name, 0, ttyconf.gid);
366# endif
367
368 } 338 }
369 339
370 rxvt_privileges (IGNORE); 340 close_tty ();
371}
372#endif
373 341
374rxvt_ptytty::rxvt_ptytty () 342 if (pty >= 0)
375{ 343 close (pty);
344
345 free (name);
346
376 pty = tty = -1; 347 pty = tty = -1;
377 name = 0; 348 name = 0;
378} 349}
379 350
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 351bool
410rxvt_ptytty::make_controlling_tty () 352ptytty_unix::get ()
411{
412 return control_tty (tty, name) >= 0;
413}
414
415bool
416rxvt_ptytty::get ()
417{ 353{
418 /* get master (pty) */ 354 /* get master (pty) */
419 if ((pty = get_pty (&tty, &name)) < 0) 355 if ((pty = get_pty (&tty, &name)) < 0)
420 return false; 356 return false;
421 357
… …
423 359
424 /* get slave (tty) */ 360 /* get slave (tty) */
425 if (tty < 0) 361 if (tty < 0)
426 { 362 {
427#ifndef NO_SETOWNER_TTYDEV 363#ifndef NO_SETOWNER_TTYDEV
428 privileges (SAVE); 364 chown (name, getuid (), ttyconf.gid); /* fail silently */
365 chmod (name, ttyconf.mode);
366# ifdef HAVE_REVOKE
367 revoke (name);
368# endif
429#endif 369#endif
430 370
431 if ((tty = get_tty (name)) < 0) 371 if ((tty = get_tty (name)) < 0)
432 { 372 {
433 put (); 373 put ();
… …
436 } 376 }
437 377
438 return true; 378 return true;
439} 379}
440 380
441/*----------------------- end-of-file (C source) -----------------------*/
442

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