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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.39 by root, Tue Jan 17 12:22:59 2006 UTC vs.
Revision 1.68 by ayin, Tue Dec 11 21:49:12 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) 2004-2006 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>
58
59#include "ptytty.h"
60 61
61///////////////////////////////////////////////////////////////////////////// 62/////////////////////////////////////////////////////////////////////////////
62 63
63/* ------------------------------------------------------------------------- * 64/* ------------------------------------------------------------------------- *
64 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 65 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
65 * ------------------------------------------------------------------------- */ 66 * ------------------------------------------------------------------------- */
66/* 67/*
67 * Returns pty file descriptor, or -1 on failure 68 * Returns pty file descriptor, or -1 on failure
68 * 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.
69 * 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
70 */ 71 */
72#if defined(UNIX98_PTY)
73
71static int 74 static int
72get_pty (int *fd_tty, char **ttydev) 75 get_pty (int *fd_tty, char **ttydev)
73{ 76 {
74 int pfd; 77 int pfd;
75 78
76#ifdef PTYS_ARE_OPENPTY 79# if defined(HAVE_GETPT)
77 char tty_name[sizeof "/dev/pts/????\0"];
78
79 rxvt_privileges(RESTORE);
80 int res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
81 rxvt_privileges(IGNORE);
82
83 if (res != -1)
84 {
85 *ttydev = strdup (tty_name);
86 return pfd;
87 }
88#endif
89
90#ifdef PTYS_ARE__GETPTY
91 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
92 if (*ttydev != NULL)
93 return pfd;
94#endif
95
96#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
97# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_POSIX) || defined(PTYS_ARE_PTMX)
98
99 {
100# ifdef PTYS_ARE_GETPT
101 pfd = getpt(); 80 pfd = getpt();
102# else 81# elif defined(HAVE_POSIX_OPENPT)
103# ifdef PTYS_ARE_POSIX
104 pfd = posix_openpt (O_RDWR); 82 pfd = posix_openpt (O_RDWR);
105# else 83# else
106 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 84 pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0);
107# endif 85# endif
108# endif
109 86
110 if (pfd >= 0) 87 if (pfd >= 0)
111 { 88 {
112 if (grantpt (pfd) == 0 /* change slave permissions */ 89 if (grantpt (pfd) == 0 /* change slave permissions */
113 && unlockpt (pfd) == 0) 90 && unlockpt (pfd) == 0)
91 {
114 { /* slave now unlocked */ 92 /* slave now unlocked */
115 *ttydev = strdup (ptsname (pfd)); /* get slave's name */ 93 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
116 return pfd; 94 return pfd;
117 } 95 }
96
118 close (pfd); 97 close (pfd);
119 } 98 }
120 }
121# endif
122#endif
123 99
124#ifdef PTYS_ARE_PTC 100 return -1;
125 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) 101 }
102
103#elif defined(HAVE_OPENPTY)
104
105 static int
106 get_pty (int *fd_tty, char **ttydev)
107 {
108 int pfd;
109 int res;
110
111 res = openpty (&pfd, fd_tty, NULL, NULL, NULL);
112
113 if (res != -1)
126 { 114 {
127 *ttydev = strdup (ttyname (pfd)); 115 *ttydev = strdup (ttyname (*fd_tty));
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 char *slave;
129
130 slave = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
131
132 if (slave != NULL) {
133 *ttydev = strdup (slave);
128 return pfd; 134 return pfd;
129 } 135 }
130#endif
131 136
132#ifdef PTYS_ARE_CLONE 137 return -1;
138 }
139
140#elif defined(HAVE_DEV_PTC)
141
142 static int
143 get_pty (int *fd_tty, char **ttydev)
144 {
145 int pfd;
146
133 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 147 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
134 {
135 *ttydev = strdup (ptsname (pfd));
136 return pfd;
137 }
138#endif
139
140#ifdef PTYS_ARE_NUMERIC
141 {
142 int idx;
143 char *c1, *c2;
144 char pty_name[] = "/dev/ptyp???";
145 char tty_name[] = "/dev/ttyp???";
146
147 c1 = &(pty_name[sizeof (pty_name) - 4]);
148 c2 = &(tty_name[sizeof (tty_name) - 4]);
149 for (idx = 0; idx < 256; idx++)
150 { 148 {
151 sprintf (c1, "%d", idx); 149 *ttydev = strdup (ttyname (pfd));
152 sprintf (c2, "%d", idx); 150 return pfd;
153 if (access (tty_name, F_OK) < 0) 151 }
152
153 return -1;
154 }
155
156#elif defined(HAVE_DEV_CLONE)
157
158 static int
159 get_pty (int *fd_tty, char **ttydev)
160 {
161 int pfd;
162
163 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
164 {
165 *ttydev = strdup (ptsname (pfd));
166 return pfd;
167 }
168
169 return -1;
170 }
171
172#else
173
174 /* Based on the code in openssh/openbsd-compat/bsd-openpty.c */
175 static int
176 get_pty (int *fd_tty, char **ttydev)
177 {
178 int pfd;
179 int i;
180 char pty_name[32];
181 char tty_name[32];
182 const char *majors = "pqrstuvwxyzabcde";
183 const char *minors = "0123456789abcdef";
184
185 for (i = 0; i < 256; i++)
186 {
187 snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]);
188 snprintf(tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]);
189
190 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
154 { 191 {
155 idx = 256; 192 snprintf(pty_name, 32, "/dev/ptyp%d", i);
156 break; 193 snprintf(tty_name, 32, "/dev/ttyp%d", i);
194 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
195 continue;
157 } 196 }
158 197
159 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 198 if (access (tty_name, R_OK | W_OK) == 0)
160 { 199 {
161 if (access (tty_name, R_OK | W_OK) == 0)
162 {
163 *ttydev = strdup (tty_name); 200 *ttydev = strdup (tty_name);
164 return pfd; 201 return pfd;
165 }
166
167 close (pfd);
168 } 202 }
203
204 close (pfd);
169 } 205 }
170 }
171#endif
172 206
173#ifdef PTYS_ARE_SEARCHED
174 {
175 const char *c1, *c2;
176 char pty_name[] = "/dev/pty??";
177 char tty_name[] = "/dev/tty??";
178
179# ifndef PTYCHAR1
180# define PTYCHAR1 "pqrstuvwxyz"
181# endif
182# ifndef PTYCHAR2
183# define PTYCHAR2 "0123456789abcdef"
184# endif
185
186 for (c1 = PTYCHAR1; *c1; c1++)
187 {
188 pty_name[ (sizeof (pty_name) - 3)] =
189 tty_name[ (sizeof (pty_name) - 3)] = *c1;
190 for (c2 = PTYCHAR2; *c2; c2++)
191 {
192 pty_name[ (sizeof (pty_name) - 2)] =
193 tty_name[ (sizeof (pty_name) - 2)] = *c2;
194 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
195 {
196 if (access (tty_name, R_OK | W_OK) == 0)
197 {
198 *ttydev = strdup (tty_name);
199 return pfd;
200 }
201
202 close (pfd);
203 }
204 }
205 }
206 }
207#endif
208
209 return -1; 207 return -1;
210} 208 }
209
210#endif
211 211
212/*----------------------------------------------------------------------*/ 212/*----------------------------------------------------------------------*/
213/* 213/*
214 * Returns tty file descriptor, or -1 on failure 214 * Returns tty file descriptor, or -1 on failure
215 */ 215 */
216static int 216static int
217get_tty (char *ttydev) 217get_tty (char *ttydev)
218{ 218{
219 return open (ttydev, O_RDWR | O_NOCTTY, 0); 219 return open (ttydev, O_RDWR | O_NOCTTY, 0);
… …
226static int 226static int
227control_tty (int fd_tty) 227control_tty (int fd_tty)
228{ 228{
229 int fd; 229 int fd;
230 230
231 /* ---------------------------------------- */
232 setsid (); 231 setsid ();
233 232
234 /* ---------------------------------------- */
235# if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 233#if defined(HAVE_DEV_PTMX) && defined(I_PUSH)
236 /* 234 /*
237 * Push STREAMS modules: 235 * Push STREAMS modules:
238 * ptem: pseudo-terminal hardware emulation module. 236 * ptem: pseudo-terminal hardware emulation module.
239 * ldterm: standard terminal line discipline. 237 * ldterm: standard terminal line discipline.
240 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 238 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
… …
248 * documentation is really unclear about whether it is any close () on 246 * documentation is really unclear about whether it is any close () on
249 * the master side or the last close () - i.e. a proper STREAMS dismantling 247 * the master side or the last close () - i.e. a proper STREAMS dismantling
250 * close () - on the master side which causes a hang up to be sent 248 * close () - on the master side which causes a hang up to be sent
251 * through - Geoff Wing 249 * through - Geoff Wing
252 */ 250 */
253# ifdef HAVE_ISASTREAM 251# ifdef HAVE_ISASTREAM
254 if (isastream (fd_tty) == 1) 252 if (isastream (fd_tty) == 1)
255# endif 253# endif
256 { 254 {
257 ioctl (fd_tty, I_PUSH, "ptem"); 255 ioctl (fd_tty, I_PUSH, "ptem");
258 ioctl (fd_tty, I_PUSH, "ldterm"); 256 ioctl (fd_tty, I_PUSH, "ldterm");
259 ioctl (fd_tty, I_PUSH, "ttcompat"); 257 ioctl (fd_tty, I_PUSH, "ttcompat");
260 } 258 }
261# endif 259#endif
262 /* ---------------------------------------- */ 260
261#ifdef TIOCSCTTY
263 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 262 ioctl (fd_tty, TIOCSCTTY, NULL);
264 /* ---------------------------------------- */ 263#else
264 fd = open (ttyname (fd_tty), O_RDWR);
265 if (fd >= 0)
266 close (fd);
267#endif
268
265 fd = open ("/dev/tty", O_WRONLY); 269 fd = open ("/dev/tty", O_WRONLY);
266 if (fd < 0) 270 if (fd < 0)
267 return -1; /* fatal */ 271 return -1; /* fatal */
272
268 close (fd); 273 close (fd);
269 /* ---------------------------------------- */
270 274
271 return 0; 275 return 0;
272} 276}
273 277
274void 278void
275rxvt_ptytty::close_tty () 279ptytty::close_tty ()
276{ 280{
277 if (tty < 0) 281 if (tty < 0)
278 return; 282 return;
279 283
280 close (tty); 284 close (tty);
281 tty = -1; 285 tty = -1;
282} 286}
283 287
284bool 288bool
285rxvt_ptytty::make_controlling_tty () 289ptytty::make_controlling_tty ()
286{ 290{
287 return control_tty (tty) >= 0; 291 return control_tty (tty) >= 0;
288} 292}
289 293
290void 294void
291rxvt_ptytty::set_utf8_mode (bool on) 295ptytty::set_utf8_mode (bool on)
292{ 296{
293#ifdef IUTF8 297#ifdef IUTF8
294 if (pty < 0) 298 if (pty < 0)
295 return; 299 return;
296 300
… …
312 } 316 }
313 } 317 }
314#endif 318#endif
315} 319}
316 320
317/////////////////////////////////////////////////////////////////////////////
318
319#ifndef NO_SETOWNER_TTYDEV
320static struct ttyconf { 321static struct ttyconf {
321 gid_t gid; 322 gid_t gid;
322 mode_t mode; 323 mode_t mode;
323 324
324 ttyconf () 325 ttyconf ()
325 { 326 {
326#ifdef TTY_GID_SUPPORT 327#ifdef TTY_GID_SUPPORT
327 struct group *gr = getgrnam ("tty"); 328 struct group *gr = getgrnam ("tty");
328 329
329 if (gr) 330 if (gr)
331 {
330 { /* change group ownership of tty to "tty" */ 332 /* change group ownership of tty to "tty" */
331 mode = S_IRUSR | S_IWUSR | S_IWGRP; 333 mode = S_IRUSR | S_IWUSR | S_IWGRP;
332 gid = gr->gr_gid; 334 gid = gr->gr_gid;
333 } 335 }
334 else 336 else
335#endif /* TTY_GID_SUPPORT */ 337#endif /* TTY_GID_SUPPORT */
336 { 338 {
337 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; 339 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
338 gid = getgid (); 340 gid = 0;
339 } 341 }
340 } 342 }
341} ttyconf; 343} ttyconf;
342 344
343///////////////////////////////////////////////////////////////////////////// 345ptytty_unix::ptytty_unix ()
346{
347 name = 0;
348#if UTMP_SUPPORT
349 cmd_pid = 0;
350#endif
351}
352
353ptytty_unix::~ptytty_unix ()
354{
355#if UTMP_SUPPORT
356 logout ();
357#endif
358 put ();
359}
344 360
345void 361void
346rxvt_ptytty_unix::privileges (rxvt_privaction action) 362ptytty_unix::put ()
347{ 363{
348 if (!name || !*name) 364 if (name)
349 return;
350
351 rxvt_privileges (RESTORE);
352
353 if (action == SAVE)
354 { 365 {
355# ifndef RESET_TTY_TO_COMMON_DEFAULTS 366 chmod (name, RESTORE_TTY_MODE);
356 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
357 if (lstat (name, &savestat) < 0) /* you lose out */
358 ;
359 else
360# endif
361 {
362 saved = true;
363 chown (name, getuid (), ttyconf.gid); /* fail silently */
364 chmod (name, ttyconf.mode);
365# ifdef HAVE_REVOKE
366 revoke (name);
367# endif
368 }
369 }
370 else
371 { /* action == RESTORE */
372# ifndef RESET_TTY_TO_COMMON_DEFAULTS
373 if (saved)
374 {
375 chmod (name, savestat.st_mode);
376 chown (name, savestat.st_uid, savestat.st_gid);
377 }
378# else
379 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
380 chown (name, 0, 0); 367 chown (name, 0, ttyconf.gid);
381# endif
382
383 } 368 }
384 369
385 rxvt_privileges (IGNORE); 370 close_tty ();
386}
387#endif
388 371
389rxvt_ptytty_unix::rxvt_ptytty_unix () 372 if (pty >= 0)
390{ 373 close (pty);
374
375 free (name);
376
391 pty = tty = -1; 377 pty = tty = -1;
392 name = 0; 378 name = 0;
393#ifndef NO_SETOWNER_TTYDEV
394 saved = false;
395#endif
396#if UTMP_SUPPORT
397 cmd_pid = 0;
398#endif
399}
400
401rxvt_ptytty_unix::~rxvt_ptytty_unix ()
402{
403 logout ();
404 put ();
405}
406
407void
408rxvt_ptytty_unix::put ()
409{
410#ifndef NO_SETOWNER_TTYDEV
411 privileges (RESTORE);
412#endif
413
414 if (pty >= 0) close (pty);
415 close_tty ();
416 free (name);
417
418 pty = tty = -1;
419 name = 0;
420} 379}
421 380
422bool 381bool
423rxvt_ptytty_unix::get () 382ptytty_unix::get ()
424{ 383{
425 /* get master (pty) */ 384 /* get master (pty) */
426 if ((pty = get_pty (&tty, &name)) < 0) 385 if ((pty = get_pty (&tty, &name)) < 0)
427 return false; 386 return false;
428 387
… …
430 389
431 /* get slave (tty) */ 390 /* get slave (tty) */
432 if (tty < 0) 391 if (tty < 0)
433 { 392 {
434#ifndef NO_SETOWNER_TTYDEV 393#ifndef NO_SETOWNER_TTYDEV
435 privileges (SAVE); 394 chown (name, getuid (), ttyconf.gid); /* fail silently */
395 chmod (name, ttyconf.mode);
396# ifdef HAVE_REVOKE
397 revoke (name);
398# endif
436#endif 399#endif
437 400
438 if ((tty = get_tty (name)) < 0) 401 if ((tty = get_tty (name)) < 0)
439 { 402 {
440 put (); 403 put ();
… …
443 } 406 }
444 407
445 return true; 408 return true;
446} 409}
447 410
448// a "factory" *g*
449rxvt_ptytty *rxvt_new_ptytty ()
450{
451 return new rxvt_ptytty_unix;
452}
453
454/*----------------------- end-of-file (C source) -----------------------*/
455

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