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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 1.66 by ayin, Thu Jun 28 17:47:14 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)
114 { /* slave now unlocked */ 91 { /* slave now unlocked */
115 *ttydev = strdup (ptsname (pfd)); /* get slave's name */ 92 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
116 return pfd; 93 return pfd;
117 } 94 }
95
118 close (pfd); 96 close (pfd);
119 } 97 }
120 }
121# endif
122#endif
123 98
124#ifdef PTYS_ARE_PTC 99 return -1;
125 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
110 res = openpty (&pfd, fd_tty, NULL, NULL, NULL);
111
112 if (res != -1)
126 { 113 {
127 *ttydev = strdup (ttyname (pfd)); 114 *ttydev = strdup (ttyname (*fd_tty));
115 return pfd;
116 }
117
118 return -1;
119 }
120
121#elif defined(HAVE__GETPTY)
122
123 static int
124 get_pty (int *fd_tty, char **ttydev)
125 {
126 int pfd;
127 char *slave;
128
129 slave = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
130
131 if (slave != NULL) {
132 *ttydev = strdup (slave);
128 return pfd; 133 return pfd;
129 } 134 }
130#endif
131 135
132#ifdef PTYS_ARE_CLONE 136 return -1;
137 }
138
139#elif defined(HAVE_DEV_PTC)
140
141 static int
142 get_pty (int *fd_tty, char **ttydev)
143 {
144 int pfd;
145
133 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 146 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 { 147 {
151 sprintf (c1, "%d", idx); 148 *ttydev = strdup (ttyname (pfd));
152 sprintf (c2, "%d", idx); 149 return pfd;
153 if (access (tty_name, F_OK) < 0) 150 }
151
152 return -1;
153 }
154
155#elif defined(HAVE_DEV_CLONE)
156
157 static int
158 get_pty (int *fd_tty, char **ttydev)
159 {
160 int pfd;
161
162 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
163 {
164 *ttydev = strdup (ptsname (pfd));
165 return pfd;
166 }
167
168 return -1;
169 }
170
171#else
172
173 /* Based on the code in openssh/openbsd-compat/bsd-openpty.c */
174 static int
175 get_pty (int *fd_tty, char **ttydev)
176 {
177 int pfd;
178 int i;
179 char pty_name[32];
180 char tty_name[32];
181 const char *majors = "pqrstuvwxyzabcde";
182 const char *minors = "0123456789abcdef";
183
184 for (i = 0; i < 256; i++)
185 {
186 snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]);
187 snprintf(tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]);
188
189 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
154 { 190 {
155 idx = 256; 191 snprintf(pty_name, 32, "/dev/ptyp%d", i);
156 break; 192 snprintf(tty_name, 32, "/dev/ttyp%d", i);
193 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
194 continue;
157 } 195 }
158 196
159 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 197 if (access (tty_name, R_OK | W_OK) == 0)
160 { 198 {
161 if (access (tty_name, R_OK | W_OK) == 0)
162 {
163 *ttydev = strdup (tty_name); 199 *ttydev = strdup (tty_name);
164 return pfd; 200 return pfd;
165 }
166
167 close (pfd);
168 } 201 }
202
203 close (pfd);
169 } 204 }
170 }
171#endif
172 205
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; 206 return -1;
210} 207 }
208
209#endif
211 210
212/*----------------------------------------------------------------------*/ 211/*----------------------------------------------------------------------*/
213/* 212/*
214 * Returns tty file descriptor, or -1 on failure 213 * Returns tty file descriptor, or -1 on failure
215 */ 214 */
216static int 215static int
217get_tty (char *ttydev) 216get_tty (char *ttydev)
218{ 217{
219 return open (ttydev, O_RDWR | O_NOCTTY, 0); 218 return open (ttydev, O_RDWR | O_NOCTTY, 0);
… …
226static int 225static int
227control_tty (int fd_tty) 226control_tty (int fd_tty)
228{ 227{
229 int fd; 228 int fd;
230 229
231 /* ---------------------------------------- */
232 setsid (); 230 setsid ();
233 231
234 /* ---------------------------------------- */
235# if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 232#if defined(HAVE_DEV_PTMX) && defined(I_PUSH)
236 /* 233 /*
237 * Push STREAMS modules: 234 * Push STREAMS modules:
238 * ptem: pseudo-terminal hardware emulation module. 235 * ptem: pseudo-terminal hardware emulation module.
239 * ldterm: standard terminal line discipline. 236 * ldterm: standard terminal line discipline.
240 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 237 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
… …
248 * documentation is really unclear about whether it is any close () on 245 * 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 246 * 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 247 * close () - on the master side which causes a hang up to be sent
251 * through - Geoff Wing 248 * through - Geoff Wing
252 */ 249 */
253# ifdef HAVE_ISASTREAM 250# ifdef HAVE_ISASTREAM
254 if (isastream (fd_tty) == 1) 251 if (isastream (fd_tty) == 1)
255# endif 252# endif
256 { 253 {
257 ioctl (fd_tty, I_PUSH, "ptem"); 254 ioctl (fd_tty, I_PUSH, "ptem");
258 ioctl (fd_tty, I_PUSH, "ldterm"); 255 ioctl (fd_tty, I_PUSH, "ldterm");
259 ioctl (fd_tty, I_PUSH, "ttcompat"); 256 ioctl (fd_tty, I_PUSH, "ttcompat");
260 } 257 }
261# endif 258#endif
262 /* ---------------------------------------- */ 259
260#ifdef TIOCSCTTY
263 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 261 ioctl (fd_tty, TIOCSCTTY, NULL);
264 /* ---------------------------------------- */ 262#else
263 fd = open (ttyname (fd_tty), O_RDWR);
264 if (fd >= 0)
265 close (fd);
266#endif
267
265 fd = open ("/dev/tty", O_WRONLY); 268 fd = open ("/dev/tty", O_WRONLY);
266 if (fd < 0) 269 if (fd < 0)
267 return -1; /* fatal */ 270 return -1; /* fatal */
271
268 close (fd); 272 close (fd);
269 /* ---------------------------------------- */
270 273
271 return 0; 274 return 0;
272} 275}
273 276
274void 277void
275rxvt_ptytty::close_tty () 278ptytty::close_tty ()
276{ 279{
277 if (tty < 0) 280 if (tty < 0)
278 return; 281 return;
279 282
280 close (tty); 283 close (tty);
281 tty = -1; 284 tty = -1;
282} 285}
283 286
284bool 287bool
285rxvt_ptytty::make_controlling_tty () 288ptytty::make_controlling_tty ()
286{ 289{
287 return control_tty (tty) >= 0; 290 return control_tty (tty) >= 0;
288} 291}
289 292
290void 293void
291rxvt_ptytty::set_utf8_mode (bool on) 294ptytty::set_utf8_mode (bool on)
292{ 295{
293#ifdef IUTF8 296#ifdef IUTF8
294 if (pty < 0) 297 if (pty < 0)
295 return; 298 return;
296 299
… …
312 } 315 }
313 } 316 }
314#endif 317#endif
315} 318}
316 319
317/////////////////////////////////////////////////////////////////////////////
318
319#ifndef NO_SETOWNER_TTYDEV
320static struct ttyconf { 320static struct ttyconf {
321 gid_t gid; 321 gid_t gid;
322 mode_t mode; 322 mode_t mode;
323 323
324 ttyconf () 324 ttyconf ()
… …
333 } 333 }
334 else 334 else
335#endif /* TTY_GID_SUPPORT */ 335#endif /* TTY_GID_SUPPORT */
336 { 336 {
337 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; 337 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
338 gid = getgid (); 338 gid = 0;
339 } 339 }
340 } 340 }
341} ttyconf; 341} ttyconf;
342 342
343///////////////////////////////////////////////////////////////////////////// 343ptytty_unix::ptytty_unix ()
344{
345 name = 0;
346#if UTMP_SUPPORT
347 cmd_pid = 0;
348#endif
349}
350
351ptytty_unix::~ptytty_unix ()
352{
353#if UTMP_SUPPORT
354 logout ();
355#endif
356 put ();
357}
344 358
345void 359void
346rxvt_ptytty_unix::privileges (rxvt_privaction action) 360ptytty_unix::put ()
347{ 361{
348 if (!name || !*name) 362 if (name)
349 return;
350
351 rxvt_privileges (RESTORE);
352
353 if (action == SAVE)
354 { 363 {
355# ifndef RESET_TTY_TO_COMMON_DEFAULTS 364 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); 365 chown (name, 0, ttyconf.gid);
381# endif
382
383 } 366 }
384 367
385 rxvt_privileges (IGNORE); 368 close_tty ();
386}
387#endif
388 369
389rxvt_ptytty_unix::rxvt_ptytty_unix () 370 if (pty >= 0)
390{ 371 close (pty);
372
373 free (name);
374
391 pty = tty = -1; 375 pty = tty = -1;
392 name = 0; 376 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} 377}
421 378
422bool 379bool
423rxvt_ptytty_unix::get () 380ptytty_unix::get ()
424{ 381{
425 /* get master (pty) */ 382 /* get master (pty) */
426 if ((pty = get_pty (&tty, &name)) < 0) 383 if ((pty = get_pty (&tty, &name)) < 0)
427 return false; 384 return false;
428 385
… …
430 387
431 /* get slave (tty) */ 388 /* get slave (tty) */
432 if (tty < 0) 389 if (tty < 0)
433 { 390 {
434#ifndef NO_SETOWNER_TTYDEV 391#ifndef NO_SETOWNER_TTYDEV
435 privileges (SAVE); 392 chown (name, getuid (), ttyconf.gid); /* fail silently */
393 chmod (name, ttyconf.mode);
394# ifdef HAVE_REVOKE
395 revoke (name);
396# endif
436#endif 397#endif
437 398
438 if ((tty = get_tty (name)) < 0) 399 if ((tty = get_tty (name)) < 0)
439 { 400 {
440 put (); 401 put ();
… …
443 } 404 }
444 405
445 return true; 406 return true;
446} 407}
447 408
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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