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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.31 by root, Tue Jan 10 18:09:22 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#ifdef PTYS_ARE_GETPTY
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 {
107# ifdef PTYS_ARE_GETPT
108 pfd = getpt (); 80 pfd = getpt();
81# elif defined(HAVE_POSIX_OPENPT)
82 pfd = posix_openpt (O_RDWR);
109# else 83# else
110 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 84 pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0);
111# endif 85# endif
112 86
113 if (pfd >= 0) 87 if (pfd >= 0)
114 { 88 {
115 if (grantpt (pfd) == 0 /* change slave permissions */ 89 if (grantpt (pfd) == 0 /* change slave permissions */
116 && unlockpt (pfd) == 0) 90 && unlockpt (pfd) == 0)
117 { /* slave now unlocked */ 91 { /* slave now unlocked */
118 *ttydev = strdup (ptsname (pfd)); /* get slave's name */ 92 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
119 return pfd; 93 return pfd;
120 } 94 }
95
121 close (pfd); 96 close (pfd);
122 } 97 }
123 }
124# endif
125#endif
126 98
127#ifdef PTYS_ARE_PTC 99 return -1;
128 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];
129 { 110
111 res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
112
113 if (res != -1)
114 {
130 *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)
131 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;
132 } 148 }
133#endif
134 149
135#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
136 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)
137 { 161 {
138 *ttydev = strdup (ptsname (pfd)); 162 *ttydev = strdup (ptsname (pfd));
139 return pfd; 163 return pfd;
140 } 164 }
141#endif
142 165
143#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)
144 { 174 {
175 int pfd;
145 int idx; 176 int i;
146 char *c1, *c2; 177 char pty_name[32];
147 char pty_name[] = "/dev/ptyp???"; 178 char tty_name[32];
148 char tty_name[] = "/dev/ttyp???"; 179 const char *majors = "pqrstuvwxyzabcde";
180 const char *minors = "0123456789abcdef";
149 181
150 c1 = &(pty_name[sizeof (pty_name) - 4]);
151 c2 = &(tty_name[sizeof (tty_name) - 4]);
152 for (idx = 0; idx < 256; idx++) 182 for (i = 0; i < 256; i++)
153 { 183 {
154 sprintf (c1, "%d", idx); 184 snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]);
155 sprintf (c2, "%d", idx); 185 snprintf(tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]);
156 if (access (tty_name, F_OK) < 0) 186
187 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
157 { 188 {
158 idx = 256; 189 snprintf(pty_name, 32, "/dev/ptyp%d", i);
159 break; 190 snprintf(tty_name, 32, "/dev/ttyp%d", i);
191 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
192 continue;
160 } 193 }
161 194
162 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 195 if (access (tty_name, R_OK | W_OK) == 0)
163 { 196 {
164 if (access (tty_name, R_OK | W_OK) == 0)
165 {
166 *ttydev = strdup (tty_name); 197 *ttydev = strdup (tty_name);
167 return pfd; 198 return pfd;
168 }
169
170 close (pfd);
171 } 199 }
172 }
173 }
174#endif
175 200
176#ifdef PTYS_ARE_SEARCHED 201 close (pfd);
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
185# ifndef PTYCHAR2
186# define PTYCHAR2 "0123456789abcdef"
187# endif
188
189 for (c1 = PTYCHAR1; *c1; c1++)
190 { 202 }
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 }
204 203
205 close (pfd);
206 }
207 }
208 }
209 }
210#endif
211
212 return -1; 204 return -1;
213} 205 }
206
207#endif
214 208
215/*----------------------------------------------------------------------*/ 209/*----------------------------------------------------------------------*/
216/* 210/*
217 * Returns tty file descriptor, or -1 on failure 211 * Returns tty file descriptor, or -1 on failure
218 */ 212 */
… …
225/*----------------------------------------------------------------------*/ 219/*----------------------------------------------------------------------*/
226/* 220/*
227 * 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
228 */ 222 */
229static int 223static int
230control_tty (int fd_tty, const char *ttydev) 224control_tty (int fd_tty)
231{ 225{
232#ifndef __QNX__
233 int fd;
234
235 /* ---------------------------------------- */
236# ifdef HAVE_SETSID
237 setsid (); 226 setsid ();
238# endif
239# if defined(HAVE_SETPGID)
240 setpgid (0, 0);
241# elif defined(HAVE_SETPGRP)
242 setpgrp (0, 0);
243# endif
244 227
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) 228#if defined(HAVE_DEV_PTMX) && defined(I_PUSH)
262 /* 229 /*
263 * Push STREAMS modules: 230 * Push STREAMS modules:
264 * ptem: pseudo-terminal hardware emulation module. 231 * ptem: pseudo-terminal hardware emulation module.
265 * ldterm: standard terminal line discipline. 232 * ldterm: standard terminal line discipline.
266 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 233 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
… …
283 ioctl (fd_tty, I_PUSH, "ptem"); 250 ioctl (fd_tty, I_PUSH, "ptem");
284 ioctl (fd_tty, I_PUSH, "ldterm"); 251 ioctl (fd_tty, I_PUSH, "ldterm");
285 ioctl (fd_tty, I_PUSH, "ttcompat"); 252 ioctl (fd_tty, I_PUSH, "ttcompat");
286 } 253 }
287#endif 254#endif
288 /* ---------------------------------------- */ 255
289# if defined(TIOCSCTTY)
290 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 256 ioctl (fd_tty, TIOCSCTTY, NULL);
291# elif defined(TIOCSETCTTY) 257
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); 258 int fd = open ("/dev/tty", O_WRONLY);
300 if (fd < 0) 259 if (fd < 0)
301 return -1; /* fatal */ 260 return -1; /* fatal */
261
302 close (fd); 262 close (fd);
303 /* ---------------------------------------- */
304#endif /* ! __QNX__ */
305 263
306 return 0; 264 return 0;
307} 265}
308 266
309#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
310static struct ttyconf { 310static struct ttyconf {
311 gid_t gid; 311 gid_t gid;
312 mode_t mode; 312 mode_t mode;
313 313
314 ttyconf () 314 ttyconf ()
… …
323 } 323 }
324 else 324 else
325#endif /* TTY_GID_SUPPORT */ 325#endif /* TTY_GID_SUPPORT */
326 { 326 {
327 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; 327 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
328 gid = getgid (); 328 gid = 0;
329 } 329 }
330 } 330 }
331} ttyconf; 331} ttyconf;
332 332
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
333void 349void
334rxvt_ptytty::privileges (rxvt_privaction action) 350ptytty_unix::put ()
335{ 351{
336 if (!name || !*name) 352 if (name)
337 return;
338
339 rxvt_privileges (RESTORE);
340
341 if (action == SAVE)
342 {
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 } 353 {
358 else 354 chmod (name, RESTORE_TTY_MODE);
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); 355 chown (name, 0, ttyconf.gid);
369# endif
370
371 } 356 }
372 357
373 rxvt_privileges (IGNORE); 358 close_tty ();
374}
375#endif
376 359
377rxvt_ptytty::rxvt_ptytty () 360 if (pty >= 0)
378{ 361 close (pty);
362
363 free (name);
364
379 pty = tty = -1; 365 pty = tty = -1;
380 name = 0; 366 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} 367}
416 368
417bool 369bool
418rxvt_ptytty::make_controlling_tty () 370ptytty_unix::get ()
419{
420 return control_tty (tty, name) >= 0;
421}
422
423bool
424rxvt_ptytty::get ()
425{ 371{
426 /* get master (pty) */ 372 /* get master (pty) */
427 if ((pty = get_pty (&tty, &name)) < 0) 373 if ((pty = get_pty (&tty, &name)) < 0)
428 return false; 374 return false;
429 375
… …
431 377
432 /* get slave (tty) */ 378 /* get slave (tty) */
433 if (tty < 0) 379 if (tty < 0)
434 { 380 {
435#ifndef NO_SETOWNER_TTYDEV 381#ifndef NO_SETOWNER_TTYDEV
436 privileges (SAVE); 382 chown (name, getuid (), ttyconf.gid); /* fail silently */
383 chmod (name, ttyconf.mode);
384# ifdef HAVE_REVOKE
385 revoke (name);
386# endif
437#endif 387#endif
438 388
439 if ((tty = get_tty (name)) < 0) 389 if ((tty = get_tty (name)) < 0)
440 { 390 {
441 put (); 391 put ();
… …
444 } 394 }
445 395
446 return true; 396 return true;
447} 397}
448 398
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

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