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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.23 by root, Thu Feb 17 15:07:48 2005 UTC vs.
Revision 1.62 by ayin, Mon Sep 11 08:48:37 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 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#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
33#ifdef HAVE_UNISTD_H
34# include <unistd.h> 37#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> 38#include <fcntl.h>
41#endif 39
42#ifdef HAVE_SYS_IOCTL_H 40#ifdef HAVE_SYS_IOCTL_H
43# include <sys/ioctl.h> 41# include <sys/ioctl.h>
44#endif 42#endif
45#if defined(PTYS_ARE_PTMX) && defined(HAVE_SYS_STROPTS_H) 43#if defined(HAVE_DEV_PTMX) && defined(HAVE_SYS_STROPTS_H)
46# include <sys/stropts.h> /* for I_PUSH */ 44# include <sys/stropts.h> /* for I_PUSH */
47#endif 45#endif
48#ifdef HAVE_ISASTREAM 46#ifdef HAVE_ISASTREAM
49# include <stropts.h> 47# include <stropts.h>
50#endif 48#endif
51#ifdef HAVE_PTY_H 49#if defined(HAVE_PTY_H)
52# include <pty.h> 50# include <pty.h>
53#endif 51#elif defined(HAVE_LIBUTIL_H)
54
55// better do this via configure, but....
56#if defined(__FreeBSD__)
57# include <libutil.h> 52# include <libutil.h>
58#elif defined(__DARWIN__) || (defined (__MACH__) && defined (__APPLE__)) 53#elif defined(HAVE_UTIL_H)
59# include <util.h> 54# include <util.h>
60#endif 55#endif
56#ifdef TTY_GID_SUPPORT
57#include <grp.h>
58#endif
61 59
62#include <cstdio> 60#include <cstdio>
63#include <grp.h> 61
62/////////////////////////////////////////////////////////////////////////////
64 63
65/* ------------------------------------------------------------------------- * 64/* ------------------------------------------------------------------------- *
66 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 65 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
67 * ------------------------------------------------------------------------- */ 66 * ------------------------------------------------------------------------- */
68/* 67/*
69 * Returns pty file descriptor, or -1 on failure 68 * Returns pty file descriptor, or -1 on failure
70 * 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.
71 * 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
72 */ 71 */
72#if defined(UNIX98_PTY)
73static int 73static int
74get_pty (int *fd_tty, char **ttydev) 74get_pty (int *fd_tty, char **ttydev)
75{ 75{
76 int pfd; 76 int pfd;
77 77
78#ifdef PTYS_ARE_OPENPTY 78# if defined(HAVE_GETPT)
79 char tty_name[sizeof "/dev/pts/????\0"]; 79 pfd = getpt();
80# elif defined(HAVE_POSIX_OPENPT)
81 pfd = posix_openpt (O_RDWR);
82# else
83 pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0);
84# endif
85 if (pfd >= 0)
86 {
87 if (grantpt (pfd) == 0 /* change slave permissions */
88 && unlockpt (pfd) == 0)
89 { /* slave now unlocked */
90 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
91 return pfd;
92 }
80 93
94 close (pfd);
95 }
96
97 return -1;
98}
99#elif defined(HAVE_OPENPTY)
100static int
101get_pty (int *fd_tty, char **ttydev)
102{
103 int pfd;
104 int res;
105 char tty_name[32];
106
81 if (openpty (&pfd, fd_tty, tty_name, NULL, NULL) != -1) 107 res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
108 if (res != -1)
82 { 109 {
83 *ttydev = strdup (tty_name); 110 *ttydev = strdup (tty_name);
84 return pfd; 111 return pfd;
85 } 112 }
86#endif
87 113
88#ifdef PTYS_ARE__GETPTY 114 return -1;
115}
116#elif defined(HAVE__GETPTY)
117static int
118get_pty (int *fd_tty, char **ttydev)
119{
120 int pfd;
121
89 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); 122 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
90 if (*ttydev != NULL) 123 if (*ttydev != NULL)
91 return pfd; 124 return pfd;
92#endif
93 125
94#ifdef PTYS_ARE_GETPTY 126 return -1;
127}
128#elif defined(HAVE_DEV_PTC)
129static int
130get_pty (int *fd_tty, char **ttydev)
131{
132 int pfd;
95 133
96 char *ptydev;
97
98 while ((ptydev = getpty ()) != NULL)
99 if ((pfd = open (ptydev, O_RDWR | O_NOCTTY, 0)) >= 0)
100 {
101 *ttydev = ptydev;
102 return pfd;
103 }
104#endif
105
106#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
107# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_PTMX)
108
109 {
110# ifdef PTYS_ARE_GETPT
111 pfd = getpt ();
112# else
113 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
114# endif
115
116 if (pfd >= 0)
117 {
118 if (grantpt (pfd) == 0 /* change slave permissions */
119 && unlockpt (pfd) == 0)
120 { /* slave now unlocked */
121 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
122 return pfd;
123 }
124 close (pfd);
125 }
126 }
127# endif
128#endif
129
130#ifdef PTYS_ARE_PTC
131 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) 134 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
132 { 135 {
133 *ttydev = strdup (ttyname (pfd)); 136 *ttydev = strdup (ttyname (pfd));
134 return pfd; 137 return pfd;
135 } 138 }
136#endif
137 139
138#ifdef PTYS_ARE_CLONE 140 return -1;
141}
142#elif defined(HAVE_DEV_CLONE)
143static int
144get_pty (int *fd_tty, char **ttydev)
145{
146 int pfd;
147
139 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 148 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
140 { 149 {
141 *ttydev = strdup (ptsname (pfd)); 150 *ttydev = strdup (ptsname (pfd));
142 return pfd; 151 return pfd;
143 } 152 }
144#endif
145 153
146#ifdef PTYS_ARE_NUMERIC 154 return -1;
147 { 155}
156#else
157/* Based on the code in openssh/openbsd-compat/bsd-openpty.c */
158static int
159get_pty (int *fd_tty, char **ttydev)
160{
161 int pfd;
148 int idx; 162 int i;
149 char *c1, *c2; 163 char pty_name[32];
150 char pty_name[] = "/dev/ptyp???"; 164 char tty_name[32];
151 char tty_name[] = "/dev/ttyp???"; 165 const char *majors = "pqrstuvwxyzabcde";
152 166 const char *minors = "0123456789abcdef";
153 c1 = &(pty_name[sizeof (pty_name) - 4]);
154 c2 = &(tty_name[sizeof (tty_name) - 4]);
155 for (idx = 0; idx < 256; idx++) 167 for (i = 0; i < 256; i++)
156 { 168 {
157 sprintf (c1, "%d", idx); 169 snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]);
158 sprintf (c2, "%d", idx); 170 snprintf(tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]);
159 if (access (tty_name, F_OK) < 0)
160 {
161 idx = 256;
162 break;
163 }
164
165 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 171 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
166 { 172 {
173 snprintf(pty_name, 32, "/dev/ptyp%d", i);
174 snprintf(tty_name, 32, "/dev/ttyp%d", i);
175 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
176 continue;
177 }
167 if (access (tty_name, R_OK | W_OK) == 0) 178 if (access (tty_name, R_OK | W_OK) == 0)
168 { 179 {
169 *ttydev = strdup (tty_name); 180 *ttydev = strdup (tty_name);
170 return pfd; 181 return pfd;
171 }
172
173 close (pfd);
174 } 182 }
183
184 close (pfd);
175 } 185 }
176 }
177#endif
178 186
179#ifdef PTYS_ARE_SEARCHED 187 return -1;
180 { 188}
181 const char *c1, *c2;
182 char pty_name[] = "/dev/pty??";
183 char tty_name[] = "/dev/tty??";
184
185# ifndef PTYCHAR1
186# define PTYCHAR1 "pqrstuvwxyz"
187# endif 189#endif
188# ifndef PTYCHAR2
189# define PTYCHAR2 "0123456789abcdef"
190# endif
191
192 for (c1 = PTYCHAR1; *c1; c1++)
193 {
194 pty_name[ (sizeof (pty_name) - 3)] =
195 tty_name[ (sizeof (pty_name) - 3)] = *c1;
196 for (c2 = PTYCHAR2; *c2; c2++)
197 {
198 pty_name[ (sizeof (pty_name) - 2)] =
199 tty_name[ (sizeof (pty_name) - 2)] = *c2;
200 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
201 {
202 if (access (tty_name, R_OK | W_OK) == 0)
203 {
204 *ttydev = strdup (tty_name);
205 return pfd;
206 }
207
208 close (pfd);
209 }
210 }
211 }
212 }
213#endif
214
215 return -1;
216}
217 190
218/*----------------------------------------------------------------------*/ 191/*----------------------------------------------------------------------*/
219/* 192/*
220 * Returns tty file descriptor, or -1 on failure 193 * Returns tty file descriptor, or -1 on failure
221 */ 194 */
… …
228/*----------------------------------------------------------------------*/ 201/*----------------------------------------------------------------------*/
229/* 202/*
230 * Make our tty a controlling tty so that /dev/tty points to us 203 * Make our tty a controlling tty so that /dev/tty points to us
231 */ 204 */
232static int 205static int
233control_tty (int fd_tty, const char *ttydev) 206control_tty (int fd_tty)
234{ 207{
235#ifndef __QNX__
236 int fd;
237
238 /* ---------------------------------------- */
239# ifdef HAVE_SETSID
240 setsid (); 208 setsid ();
241# endif
242# if defined(HAVE_SETPGID)
243 setpgid (0, 0);
244# elif defined(HAVE_SETPGRP)
245 setpgrp (0, 0);
246# endif
247 209
248 /* ---------------------------------------- */
249# ifdef TIOCNOTTY
250 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
251 if (fd >= 0)
252 {
253 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
254 close (fd);
255 }
256# endif
257
258 /* ---------------------------------------- */
259 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
260 if (fd >= 0)
261 close (fd); /* ouch: still have controlling tty */
262
263 /* ---------------------------------------- */
264#if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 210#if defined(HAVE_DEV_PTMX) && defined(I_PUSH)
265 /* 211 /*
266 * Push STREAMS modules: 212 * Push STREAMS modules:
267 * ptem: pseudo-terminal hardware emulation module. 213 * ptem: pseudo-terminal hardware emulation module.
268 * ldterm: standard terminal line discipline. 214 * ldterm: standard terminal line discipline.
269 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 215 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
… …
286 ioctl (fd_tty, I_PUSH, "ptem"); 232 ioctl (fd_tty, I_PUSH, "ptem");
287 ioctl (fd_tty, I_PUSH, "ldterm"); 233 ioctl (fd_tty, I_PUSH, "ldterm");
288 ioctl (fd_tty, I_PUSH, "ttcompat"); 234 ioctl (fd_tty, I_PUSH, "ttcompat");
289 } 235 }
290#endif 236#endif
291 /* ---------------------------------------- */ 237
292# if defined(TIOCSCTTY)
293 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 238 ioctl (fd_tty, TIOCSCTTY, NULL);
294# elif defined(TIOCSETCTTY) 239
295 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
296# else
297 fd = open (ttydev, O_RDWR);
298 if (fd >= 0)
299 close (fd);
300# endif
301 /* ---------------------------------------- */
302 fd = open ("/dev/tty", O_WRONLY); 240 int fd = open ("/dev/tty", O_WRONLY);
303 if (fd < 0) 241 if (fd < 0)
304 return -1; /* fatal */ 242 return -1; /* fatal */
243
305 close (fd); 244 close (fd);
306 /* ---------------------------------------- */
307#endif /* ! __QNX__ */
308 245
309 return 0; 246 return 0;
310} 247}
311 248
312#ifndef NO_SETOWNER_TTYDEV 249void
250ptytty::close_tty ()
251{
252 if (tty < 0)
253 return;
254
255 close (tty);
256 tty = -1;
257}
258
259bool
260ptytty::make_controlling_tty ()
261{
262 return control_tty (tty) >= 0;
263}
264
265void
266ptytty::set_utf8_mode (bool on)
267{
268#ifdef IUTF8
269 if (pty < 0)
270 return;
271
272 struct termios tio;
273
274 if (tcgetattr (pty, &tio) != -1)
275 {
276 tcflag_t new_cflag = tio.c_iflag;
277
278 if (on)
279 new_cflag |= IUTF8;
280 else
281 new_cflag &= ~IUTF8;
282
283 if (new_cflag != tio.c_iflag)
284 {
285 tio.c_iflag = new_cflag;
286 tcsetattr (pty, TCSANOW, &tio);
287 }
288 }
289#endif
290}
291
313static struct ttyconf { 292static struct ttyconf {
314 gid_t gid; 293 gid_t gid;
315 mode_t mode; 294 mode_t mode;
316 295
317 ttyconf () 296 ttyconf ()
… …
326 } 305 }
327 else 306 else
328#endif /* TTY_GID_SUPPORT */ 307#endif /* TTY_GID_SUPPORT */
329 { 308 {
330 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; 309 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
331 gid = getgid (); 310 gid = 0;
332 } 311 }
333 } 312 }
334} ttyconf; 313} ttyconf;
335 314
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
336void 331void
337rxvt_ptytty::privileges (rxvt_privaction action) 332ptytty_unix::put ()
338{ 333{
334 chmod (name, RESTORE_TTY_MODE);
335 chown (name, 0, ttyconf.gid);
336
337 close_tty ();
338
339 if (tty < 0) 339 if (pty >= 0)
340 return; 340 close (pty);
341 341
342 rxvt_privileges (RESTORE); 342 free (name);
343 343
344 if (action == SAVE)
345 {
346 //next_tty_action = RESTORE;
347# ifndef RESET_TTY_TO_COMMON_DEFAULTS
348 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
349 if (lstat (name, &savestat) < 0) /* you lose out */
350 ;//next_tty_action = IGNORE;
351 else
352# endif
353 {
354 chown (name, getuid (), ttyconf.gid); /* fail silently */
355 chmod (name, ttyconf.mode);
356# ifdef HAVE_REVOKE
357 revoke (name);
358# endif
359 }
360 }
361 else
362 { /* action == RESTORE */
363 //next_tty_action = IGNORE;
364# ifndef RESET_TTY_TO_COMMON_DEFAULTS
365 chmod (name, savestat.st_mode);
366 chown (name, savestat.st_uid, savestat.st_gid);
367# else
368 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
369 chown (name, 0, 0);
370# endif
371
372 }
373
374 rxvt_privileges (IGNORE);
375}
376#endif
377
378rxvt_ptytty::rxvt_ptytty ()
379{
380 pty = tty = -1; 344 pty = tty = -1;
381 name = 0; 345 name = 0;
382} 346}
383 347
384rxvt_ptytty::~rxvt_ptytty ()
385{
386 put ();
387}
388
389void
390
391rxvt_ptytty::close_tty ()
392{
393 if (tty >= 0) close (tty);
394 tty = -1;
395}
396
397void
398rxvt_ptytty::put ()
399{
400#ifndef NO_SETOWNER_TTYDEV
401 if (tty >= 0)
402 privileges (RESTORE);
403#endif
404
405 if (pty >= 0) close (pty);
406 close_tty ();
407 free (name);
408
409 pty = tty = -1;
410 name = 0;
411}
412
413bool 348bool
414rxvt_ptytty::make_controlling_tty () 349ptytty_unix::get ()
415{
416 return control_tty (tty, name) >= 0;
417}
418
419bool
420rxvt_ptytty::get ()
421{ 350{
422 /* get master (pty) */ 351 /* get master (pty) */
423 if ((pty = get_pty (&tty, &name)) < 0) 352 if ((pty = get_pty (&tty, &name)) < 0)
424 return false; 353 return false;
425 354
… …
427 356
428 /* get slave (tty) */ 357 /* get slave (tty) */
429 if (tty < 0) 358 if (tty < 0)
430 { 359 {
431#ifndef NO_SETOWNER_TTYDEV 360#ifndef NO_SETOWNER_TTYDEV
432 privileges (SAVE); 361 chown (name, getuid (), ttyconf.gid); /* fail silently */
362 chmod (name, ttyconf.mode);
363# ifdef HAVE_REVOKE
364 revoke (name);
365# endif
433#endif 366#endif
434 367
435 if ((tty = get_tty (name)) < 0) 368 if ((tty = get_tty (name)) < 0)
436 { 369 {
437 put (); 370 put ();
… …
440 } 373 }
441 374
442 return true; 375 return true;
443} 376}
444 377
445void
446rxvt_ptytty::set_utf8_mode (bool on)
447{
448#ifdef IUTF8
449 if (pty != -1)
450 {
451 struct termios tio;
452
453 if (tcgetattr (pty, &tio) != -1)
454 {
455 tcflag_t new_cflag = tio.c_iflag;
456
457 if (on)
458 new_cflag |= IUTF8;
459 else
460 new_cflag &= ~IUTF8;
461
462 if (new_cflag != tio.c_iflag)
463 {
464 tio.c_iflag = new_cflag;
465 tcsetattr (pty, TCSANOW, &tio);
466 }
467 }
468 }
469#endif
470}
471
472/*----------------------- end-of-file (C source) -----------------------*/
473

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