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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.32 by root, Wed Jan 11 20:46:46 2006 UTC vs.
Revision 1.63 by root, Tue Oct 3 11:21:33 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)
73
67static int 74 static int
68get_pty (int *fd_tty, char **ttydev) 75 get_pty (int *fd_tty, char **ttydev)
69{ 76 {
70 int pfd; 77 int pfd;
71 78
72#ifdef PTYS_ARE_OPENPTY 79# if defined(HAVE_GETPT)
73 char tty_name[sizeof "/dev/pts/????\0"];
74
75 rxvt_privileges(RESTORE);
76 int res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
77 rxvt_privileges(IGNORE);
78
79 if (res != -1)
80 {
81 *ttydev = strdup (tty_name);
82 return pfd;
83 }
84#endif
85
86#ifdef PTYS_ARE__GETPTY
87 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
88 if (*ttydev != NULL)
89 return pfd;
90#endif
91
92#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
93# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_PTMX)
94
95 {
96# ifdef PTYS_ARE_GETPT
97 pfd = getpt (); 80 pfd = getpt();
81# elif defined(HAVE_POSIX_OPENPT)
82 pfd = posix_openpt (O_RDWR);
98# else 83# else
99 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 84 pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0);
100# endif 85# endif
101 86
102 if (pfd >= 0) 87 if (pfd >= 0)
103 { 88 {
104 if (grantpt (pfd) == 0 /* change slave permissions */ 89 if (grantpt (pfd) == 0 /* change slave permissions */
105 && unlockpt (pfd) == 0) 90 && unlockpt (pfd) == 0)
106 { /* slave now unlocked */ 91 { /* slave now unlocked */
107 *ttydev = strdup (ptsname (pfd)); /* get slave's name */ 92 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
108 return pfd; 93 return pfd;
109 } 94 }
95
110 close (pfd); 96 close (pfd);
111 } 97 }
112 }
113# endif
114#endif
115 98
116#ifdef PTYS_ARE_PTC 99 return -1;
117 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];
118 { 110
111 res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
112
113 if (res != -1)
114 {
119 *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)
120 return pfd; 132 return pfd;
133
134 return -1;
135 }
136
137#elif defined(HAVE_DEV_PTC)
138
139 static int
140 get_pty (int *fd_tty, char **ttydev)
141 {
142 int pfd;
143
144 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
145 {
146 *ttydev = strdup (ttyname (pfd));
147 return pfd;
121 } 148 }
122#endif
123 149
124#ifdef PTYS_ARE_CLONE 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
125 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 160 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
126 { 161 {
127 *ttydev = strdup (ptsname (pfd)); 162 *ttydev = strdup (ptsname (pfd));
128 return pfd; 163 return pfd;
129 } 164 }
130#endif
131 165
132#ifdef PTYS_ARE_NUMERIC 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)
133 { 174 {
175 int pfd;
134 int idx; 176 int i;
135 char *c1, *c2; 177 char pty_name[32];
136 char pty_name[] = "/dev/ptyp???"; 178 char tty_name[32];
137 char tty_name[] = "/dev/ttyp???"; 179 const char *majors = "pqrstuvwxyzabcde";
180 const char *minors = "0123456789abcdef";
138 181
139 c1 = &(pty_name[sizeof (pty_name) - 4]);
140 c2 = &(tty_name[sizeof (tty_name) - 4]);
141 for (idx = 0; idx < 256; idx++) 182 for (i = 0; i < 256; i++)
142 { 183 {
143 sprintf (c1, "%d", idx); 184 snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]);
144 sprintf (c2, "%d", idx); 185 snprintf(tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]);
145 if (access (tty_name, F_OK) < 0) 186
187 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
146 { 188 {
147 idx = 256; 189 snprintf(pty_name, 32, "/dev/ptyp%d", i);
148 break; 190 snprintf(tty_name, 32, "/dev/ttyp%d", i);
191 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
192 continue;
149 } 193 }
150 194
151 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 195 if (access (tty_name, R_OK | W_OK) == 0)
152 { 196 {
153 if (access (tty_name, R_OK | W_OK) == 0)
154 {
155 *ttydev = strdup (tty_name); 197 *ttydev = strdup (tty_name);
156 return pfd; 198 return pfd;
157 }
158
159 close (pfd);
160 } 199 }
161 }
162 }
163#endif
164 200
165#ifdef PTYS_ARE_SEARCHED 201 close (pfd);
166 {
167 const char *c1, *c2;
168 char pty_name[] = "/dev/pty??";
169 char tty_name[] = "/dev/tty??";
170
171# ifndef PTYCHAR1
172# define PTYCHAR1 "pqrstuvwxyz"
173# endif
174# ifndef PTYCHAR2
175# define PTYCHAR2 "0123456789abcdef"
176# endif
177
178 for (c1 = PTYCHAR1; *c1; c1++)
179 { 202 }
180 pty_name[ (sizeof (pty_name) - 3)] =
181 tty_name[ (sizeof (pty_name) - 3)] = *c1;
182 for (c2 = PTYCHAR2; *c2; c2++)
183 {
184 pty_name[ (sizeof (pty_name) - 2)] =
185 tty_name[ (sizeof (pty_name) - 2)] = *c2;
186 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
187 {
188 if (access (tty_name, R_OK | W_OK) == 0)
189 {
190 *ttydev = strdup (tty_name);
191 return pfd;
192 }
193 203
194 close (pfd);
195 }
196 }
197 }
198 }
199#endif
200
201 return -1; 204 return -1;
202} 205 }
206
207#endif
203 208
204/*----------------------------------------------------------------------*/ 209/*----------------------------------------------------------------------*/
205/* 210/*
206 * Returns tty file descriptor, or -1 on failure 211 * Returns tty file descriptor, or -1 on failure
207 */ 212 */
… …
214/*----------------------------------------------------------------------*/ 219/*----------------------------------------------------------------------*/
215/* 220/*
216 * 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
217 */ 222 */
218static int 223static int
219control_tty (int fd_tty, const char *ttydev) 224control_tty (int fd_tty)
220{ 225{
221#ifndef __QNX__
222 int fd;
223
224 /* ---------------------------------------- */
225# ifdef HAVE_SETSID
226 setsid (); 226 setsid ();
227# endif
228# if defined(HAVE_SETPGID)
229 setpgid (0, 0);
230# elif defined(HAVE_SETPGRP)
231 setpgrp (0, 0);
232# endif
233 227
234 /* ---------------------------------------- */
235# ifdef TIOCNOTTY
236 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
237 if (fd >= 0)
238 {
239 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
240 close (fd);
241 }
242# endif
243
244 /* ---------------------------------------- */
245 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
246 if (fd >= 0)
247 close (fd); /* ouch: still have controlling tty */
248
249 /* ---------------------------------------- */
250#if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 228#if defined(HAVE_DEV_PTMX) && defined(I_PUSH)
251 /* 229 /*
252 * Push STREAMS modules: 230 * Push STREAMS modules:
253 * ptem: pseudo-terminal hardware emulation module. 231 * ptem: pseudo-terminal hardware emulation module.
254 * ldterm: standard terminal line discipline. 232 * ldterm: standard terminal line discipline.
255 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 233 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
… …
272 ioctl (fd_tty, I_PUSH, "ptem"); 250 ioctl (fd_tty, I_PUSH, "ptem");
273 ioctl (fd_tty, I_PUSH, "ldterm"); 251 ioctl (fd_tty, I_PUSH, "ldterm");
274 ioctl (fd_tty, I_PUSH, "ttcompat"); 252 ioctl (fd_tty, I_PUSH, "ttcompat");
275 } 253 }
276#endif 254#endif
277 /* ---------------------------------------- */ 255
278# if defined(TIOCSCTTY)
279 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 256 ioctl (fd_tty, TIOCSCTTY, NULL);
280# elif defined(TIOCSETCTTY) 257
281 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
282# else
283 fd = open (ttydev, O_RDWR);
284 if (fd >= 0)
285 close (fd);
286# endif
287 /* ---------------------------------------- */
288 fd = open ("/dev/tty", O_WRONLY); 258 int fd = open ("/dev/tty", O_WRONLY);
289 if (fd < 0) 259 if (fd < 0)
290 return -1; /* fatal */ 260 return -1; /* fatal */
261
291 close (fd); 262 close (fd);
292 /* ---------------------------------------- */
293#endif /* ! __QNX__ */
294 263
295 return 0; 264 return 0;
296} 265}
297 266
298#ifndef NO_SETOWNER_TTYDEV 267void
268ptytty::close_tty ()
269{
270 if (tty < 0)
271 return;
272
273 close (tty);
274 tty = -1;
275}
276
277bool
278ptytty::make_controlling_tty ()
279{
280 return control_tty (tty) >= 0;
281}
282
283void
284ptytty::set_utf8_mode (bool on)
285{
286#ifdef IUTF8
287 if (pty < 0)
288 return;
289
290 struct termios tio;
291
292 if (tcgetattr (pty, &tio) != -1)
293 {
294 tcflag_t new_cflag = tio.c_iflag;
295
296 if (on)
297 new_cflag |= IUTF8;
298 else
299 new_cflag &= ~IUTF8;
300
301 if (new_cflag != tio.c_iflag)
302 {
303 tio.c_iflag = new_cflag;
304 tcsetattr (pty, TCSANOW, &tio);
305 }
306 }
307#endif
308}
309
299static struct ttyconf { 310static struct ttyconf {
300 gid_t gid; 311 gid_t gid;
301 mode_t mode; 312 mode_t mode;
302 313
303 ttyconf () 314 ttyconf ()
… …
312 } 323 }
313 else 324 else
314#endif /* TTY_GID_SUPPORT */ 325#endif /* TTY_GID_SUPPORT */
315 { 326 {
316 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; 327 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
317 gid = getgid (); 328 gid = 0;
318 } 329 }
319 } 330 }
320} ttyconf; 331} ttyconf;
321 332
333ptytty_unix::ptytty_unix ()
334{
335 name = 0;
336#if UTMP_SUPPORT
337 cmd_pid = 0;
338#endif
339}
340
341ptytty_unix::~ptytty_unix ()
342{
343#if UTMP_SUPPORT
344 logout ();
345#endif
346 put ();
347}
348
322void 349void
323rxvt_ptytty::privileges (rxvt_privaction action) 350ptytty_unix::put ()
324{ 351{
325 if (!name || !*name) 352 if (name)
326 return;
327
328 rxvt_privileges (RESTORE);
329
330 if (action == SAVE)
331 {
332# ifndef RESET_TTY_TO_COMMON_DEFAULTS
333 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
334 if (lstat (name, &savestat) < 0) /* you lose out */
335 ;
336 else
337# endif
338 {
339 saved = true;
340 chown (name, getuid (), ttyconf.gid); /* fail silently */
341 chmod (name, ttyconf.mode);
342# ifdef HAVE_REVOKE
343 revoke (name);
344# endif
345 }
346 } 353 {
347 else 354 chmod (name, RESTORE_TTY_MODE);
348 { /* action == RESTORE */
349# ifndef RESET_TTY_TO_COMMON_DEFAULTS
350 if (saved)
351 {
352 chmod (name, savestat.st_mode);
353 chown (name, savestat.st_uid, savestat.st_gid);
354 }
355# else
356 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
357 chown (name, 0, 0); 355 chown (name, 0, ttyconf.gid);
358# endif
359
360 } 356 }
361 357
362 rxvt_privileges (IGNORE); 358 close_tty ();
363}
364#endif
365 359
366rxvt_ptytty::rxvt_ptytty () 360 if (pty >= 0)
367{ 361 close (pty);
362
363 free (name);
364
368 pty = tty = -1; 365 pty = tty = -1;
369 name = 0; 366 name = 0;
370#ifndef NO_SETOWNER_TTYDEV
371 saved = false;
372#endif
373}
374
375rxvt_ptytty::~rxvt_ptytty ()
376{
377 put ();
378}
379
380void
381
382rxvt_ptytty::close_tty ()
383{
384 if (tty < 0)
385 return;
386
387 close (tty);
388 tty = -1;
389}
390
391void
392rxvt_ptytty::put ()
393{
394#ifndef NO_SETOWNER_TTYDEV
395 privileges (RESTORE);
396#endif
397
398 if (pty >= 0) close (pty);
399 close_tty ();
400 free (name);
401
402 pty = tty = -1;
403 name = 0;
404} 367}
405 368
406bool 369bool
407rxvt_ptytty::make_controlling_tty () 370ptytty_unix::get ()
408{
409 return control_tty (tty, name) >= 0;
410}
411
412bool
413rxvt_ptytty::get ()
414{ 371{
415 /* get master (pty) */ 372 /* get master (pty) */
416 if ((pty = get_pty (&tty, &name)) < 0) 373 if ((pty = get_pty (&tty, &name)) < 0)
417 return false; 374 return false;
418 375
… …
420 377
421 /* get slave (tty) */ 378 /* get slave (tty) */
422 if (tty < 0) 379 if (tty < 0)
423 { 380 {
424#ifndef NO_SETOWNER_TTYDEV 381#ifndef NO_SETOWNER_TTYDEV
425 privileges (SAVE); 382 chown (name, getuid (), ttyconf.gid); /* fail silently */
383 chmod (name, ttyconf.mode);
384# ifdef HAVE_REVOKE
385 revoke (name);
386# endif
426#endif 387#endif
427 388
428 if ((tty = get_tty (name)) < 0) 389 if ((tty = get_tty (name)) < 0)
429 { 390 {
430 put (); 391 put ();
… …
433 } 394 }
434 395
435 return true; 396 return true;
436} 397}
437 398
438void
439rxvt_ptytty::set_utf8_mode (bool on)
440{
441#ifdef IUTF8
442 if (pty < 0)
443 return;
444
445 struct termios tio;
446
447 if (tcgetattr (pty, &tio) != -1)
448 {
449 tcflag_t new_cflag = tio.c_iflag;
450
451 if (on)
452 new_cflag |= IUTF8;
453 else
454 new_cflag &= ~IUTF8;
455
456 if (new_cflag != tio.c_iflag)
457 {
458 tio.c_iflag = new_cflag;
459 tcsetattr (pty, TCSANOW, &tio);
460 }
461 }
462#endif
463}
464
465/*----------------------- end-of-file (C source) -----------------------*/
466

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