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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.16 by root, Sun Aug 15 03:30:04 2004 UTC vs.
Revision 1.71 by root, Mon Feb 21 07:41:02 2011 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 <schmorp@schmorp.de>
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 37#include <sys/stat.h>
33#ifdef HAVE_UNISTD_H
34# include <unistd.h> 38#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> 39#include <fcntl.h>
41#endif 40
42#ifdef HAVE_SYS_IOCTL_H 41#ifdef HAVE_SYS_IOCTL_H
43# include <sys/ioctl.h> 42# include <sys/ioctl.h>
44#endif 43#endif
45#if defined(PTYS_ARE_PTMX) && defined(HAVE_SYS_STROPTS_H) 44#if defined(HAVE_DEV_PTMX) && defined(HAVE_SYS_STROPTS_H)
46# include <sys/stropts.h> /* for I_PUSH */ 45# include <sys/stropts.h> /* for I_PUSH */
47#endif 46#endif
48#ifdef HAVE_ISASTREAM 47#if defined(HAVE_ISASTREAM) && defined(HAVE_STROPTS_H)
49# include <stropts.h> 48# include <stropts.h>
50#endif 49#endif
51 50#if defined(HAVE_PTY_H)
52#if defined( __FreeBSD__) 51# include <pty.h>
53// better do this via configure, but.... 52#elif defined(HAVE_LIBUTIL_H)
54# include <libutil.h> 53# include <libutil.h>
54#elif defined(HAVE_UTIL_H)
55# include <util.h>
56#endif
57#ifdef TTY_GID_SUPPORT
58#include <grp.h>
55#endif 59#endif
56 60
57#include <cstdio> 61#include <cstdio>
58#include <grp.h> 62
63/////////////////////////////////////////////////////////////////////////////
59 64
60/* ------------------------------------------------------------------------- * 65/* ------------------------------------------------------------------------- *
61 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 66 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
62 * ------------------------------------------------------------------------- */ 67 * ------------------------------------------------------------------------- */
63/* 68/*
64 * Returns pty file descriptor, or -1 on failure 69 * Returns pty file descriptor, or -1 on failure
65 * If successful, ttydev is set to the name of the slave device. 70 * If successful, ttydev is set to the name of the slave device.
66 * fd_tty _may_ also be set to an open fd to the slave device 71 * fd_tty _may_ also be set to an open fd to the slave device
67 */ 72 */
73#if defined(UNIX98_PTY)
74
68static int 75 static int
69get_pty (int *fd_tty, char **ttydev) 76 get_pty (int *fd_tty, char **ttydev)
70{
71 int pfd;
72
73#ifdef PTYS_ARE_OPENPTY
74 char tty_name[sizeof "/dev/pts/????\0"];
75
76 if (openpty (&pfd, fd_tty, tty_name, NULL, NULL) != -1)
77 {
78 *ttydev = strdup (tty_name);
79 return pfd;
80 }
81#endif
82
83#ifdef PTYS_ARE__GETPTY
84 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
85 if (*ttydev != NULL)
86 return pfd;
87#endif
88
89#ifdef PTYS_ARE_GETPTY
90
91 char *ptydev;
92
93 while ((ptydev = getpty ()) != NULL)
94 if ((pfd = open (ptydev, O_RDWR | O_NOCTTY, 0)) >= 0)
95 {
96 *ttydev = ptydev;
97 return pfd;
98 }
99#endif
100
101#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
102# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_PTMX)
103
104 { 77 {
105# ifdef PTYS_ARE_GETPT 78 int pfd;
79
80# if defined(HAVE_GETPT)
106 pfd = getpt (); 81 pfd = getpt();
82# elif defined(HAVE_POSIX_OPENPT)
83 pfd = posix_openpt (O_RDWR);
107# else 84# else
108 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 85 pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0);
109# endif 86# endif
110 87
111 if (pfd >= 0) 88 if (pfd >= 0)
112 { 89 {
113 if (grantpt (pfd) == 0 /* change slave permissions */ 90 if (grantpt (pfd) == 0 /* change slave permissions */
114 && unlockpt (pfd) == 0) 91 && unlockpt (pfd) == 0)
92 {
115 { /* slave now unlocked */ 93 /* slave now unlocked */
116 *ttydev = strdup (ptsname (pfd)); /* get slave's name */ 94 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
117 return pfd; 95 return pfd;
118 } 96 }
97
119 close (pfd); 98 close (pfd);
120 } 99 }
100
101 return -1;
121 } 102 }
122# endif
123#endif
124 103
125#ifdef PTYS_ARE_PTC 104#elif defined(HAVE_OPENPTY)
126 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
127 {
128 *ttydev = strdup (ttyname (pfd));
129 return pfd;
130 }
131#endif
132 105
133#ifdef PTYS_ARE_CLONE 106 static int
134 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 107 get_pty (int *fd_tty, char **ttydev)
135 {
136 *ttydev = strdup (ptsname (pfd));
137 return pfd;
138 }
139#endif
140
141#ifdef PTYS_ARE_NUMERIC
142 { 108 {
143 int idx; 109 int pfd;
144 char *c1, *c2; 110 int res;
145 char pty_name[] = "/dev/ptyp???";
146 char tty_name[] = "/dev/ttyp???";
147 111
148 c1 = &(pty_name[sizeof (pty_name) - 4]); 112 res = openpty (&pfd, fd_tty, NULL, NULL, NULL);
149 c2 = &(tty_name[sizeof (tty_name) - 4]); 113
150 for (idx = 0; idx < 256; idx++) 114 if (res != -1)
151 { 115 {
152 sprintf (c1, "%d", idx); 116 *ttydev = strdup (ttyname (*fd_tty));
153 sprintf (c2, "%d", idx); 117 return pfd;
154 if (access (tty_name, F_OK) < 0) 118 }
119
120 return -1;
121 }
122
123#elif defined(HAVE__GETPTY)
124
125 static int
126 get_pty (int *fd_tty, char **ttydev)
127 {
128 int pfd;
129 char *slave;
130
131 slave = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
132
133 if (slave != NULL)
134 {
135 *ttydev = strdup (slave);
136 return pfd;
137 }
138
139 return -1;
140 }
141
142#else
143
144 /* Based on the code in openssh/openbsd-compat/bsd-openpty.c */
145 static int
146 get_pty (int *fd_tty, char **ttydev)
147 {
148 int pfd;
149 int i;
150 char pty_name[32];
151 char tty_name[32];
152 const char *majors = "pqrstuvwxyzabcde";
153 const char *minors = "0123456789abcdef";
154
155 for (i = 0; i < 256; i++)
156 {
157 snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]);
158 snprintf(tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]);
159
160 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
155 { 161 {
156 idx = 256; 162 snprintf(pty_name, 32, "/dev/ptyp%d", i);
157 break; 163 snprintf(tty_name, 32, "/dev/ttyp%d", i);
164 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
165 continue;
158 } 166 }
159 167
160 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 168 if (access (tty_name, R_OK | W_OK) == 0)
161 { 169 {
162 if (access (tty_name, R_OK | W_OK) == 0)
163 {
164 *ttydev = strdup (tty_name); 170 *ttydev = strdup (tty_name);
165 return pfd; 171 return pfd;
166 }
167
168 close (pfd);
169 } 172 }
173
174 close (pfd);
170 } 175 }
176
177 return -1;
171 } 178 }
172#endif
173 179
174#ifdef PTYS_ARE_SEARCHED
175 {
176 const char *c1, *c2;
177 char pty_name[] = "/dev/pty??";
178 char tty_name[] = "/dev/tty??";
179
180# ifndef PTYCHAR1
181# define PTYCHAR1 "pqrstuvwxyz"
182# endif 180#endif
183# ifndef PTYCHAR2
184# define PTYCHAR2 "0123456789abcdef"
185# endif
186
187 for (c1 = PTYCHAR1; *c1; c1++)
188 {
189 pty_name[ (sizeof (pty_name) - 3)] =
190 tty_name[ (sizeof (pty_name) - 3)] = *c1;
191 for (c2 = PTYCHAR2; *c2; c2++)
192 {
193 pty_name[ (sizeof (pty_name) - 2)] =
194 tty_name[ (sizeof (pty_name) - 2)] = *c2;
195 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
196 {
197 if (access (tty_name, R_OK | W_OK) == 0)
198 {
199 *ttydev = strdup (tty_name);
200 return pfd;
201 }
202
203 close (pfd);
204 }
205 }
206 }
207 }
208#endif
209
210 return -1;
211}
212 181
213/*----------------------------------------------------------------------*/ 182/*----------------------------------------------------------------------*/
214/* 183/*
215 * Returns tty file descriptor, or -1 on failure 184 * Returns tty file descriptor, or -1 on failure
216 */ 185 */
217static int 186static int
218get_tty (char *ttydev) 187get_tty (char *ttydev)
219{ 188{
220 return open (ttydev, O_RDWR | O_NOCTTY, 0); 189 return open (ttydev, O_RDWR | O_NOCTTY, 0);
… …
223/*----------------------------------------------------------------------*/ 192/*----------------------------------------------------------------------*/
224/* 193/*
225 * Make our tty a controlling tty so that /dev/tty points to us 194 * Make our tty a controlling tty so that /dev/tty points to us
226 */ 195 */
227static int 196static int
228control_tty (int fd_tty, const char *ttydev) 197control_tty (int fd_tty)
229{ 198{
230#ifndef __QNX__
231 int fd; 199 int fd;
232 200
233 /* ---------------------------------------- */
234# ifdef HAVE_SETSID
235 setsid (); 201 setsid ();
236# endif
237# if defined(HAVE_SETPGID)
238 setpgid (0, 0);
239# elif defined(HAVE_SETPGRP)
240 setpgrp (0, 0);
241# endif
242 202
243 /* ---------------------------------------- */
244# ifdef TIOCNOTTY
245 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
246 if (fd >= 0)
247 {
248 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
249 close (fd);
250 }
251# endif
252
253 /* ---------------------------------------- */
254 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
255 if (fd >= 0)
256 close (fd); /* ouch: still have controlling tty */
257
258 /* ---------------------------------------- */
259#if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 203#if defined(HAVE_DEV_PTMX) && defined(I_PUSH)
260 /* 204 /*
261 * Push STREAMS modules: 205 * Push STREAMS modules:
262 * ptem: pseudo-terminal hardware emulation module. 206 * ptem: pseudo-terminal hardware emulation module.
263 * ldterm: standard terminal line discipline. 207 * ldterm: standard terminal line discipline.
264 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 208 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
… …
272 * documentation is really unclear about whether it is any close () on 216 * documentation is really unclear about whether it is any close () on
273 * the master side or the last close () - i.e. a proper STREAMS dismantling 217 * the master side or the last close () - i.e. a proper STREAMS dismantling
274 * close () - on the master side which causes a hang up to be sent 218 * close () - on the master side which causes a hang up to be sent
275 * through - Geoff Wing 219 * through - Geoff Wing
276 */ 220 */
277# ifdef HAVE_ISASTREAM 221#if defined(HAVE_ISASTREAM) && defined(HAVE_STROPTS_H)
278 if (isastream (fd_tty) == 1) 222 if (isastream (fd_tty) == 1)
279# endif 223# endif
280 { 224 {
281 ioctl (fd_tty, I_PUSH, "ptem"); 225 ioctl (fd_tty, I_PUSH, "ptem");
282 ioctl (fd_tty, I_PUSH, "ldterm"); 226 ioctl (fd_tty, I_PUSH, "ldterm");
283 ioctl (fd_tty, I_PUSH, "ttcompat"); 227 ioctl (fd_tty, I_PUSH, "ttcompat");
284 } 228 }
285#endif 229#endif
286 /* ---------------------------------------- */ 230
287# if defined(TIOCSCTTY) 231#ifdef TIOCSCTTY
288 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 232 ioctl (fd_tty, TIOCSCTTY, NULL);
289# elif defined(TIOCSETCTTY)
290 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
291# else 233#else
292 fd = open (ttydev, O_RDWR); 234 fd = open (ttyname (fd_tty), O_RDWR);
293 if (fd >= 0) 235 if (fd >= 0)
294 close (fd); 236 close (fd);
295# endif 237#endif
296 /* ---------------------------------------- */ 238
297 fd = open ("/dev/tty", O_WRONLY); 239 fd = open ("/dev/tty", O_WRONLY);
298 if (fd < 0) 240 if (fd < 0)
299 return -1; /* fatal */ 241 return -1; /* fatal */
242
300 close (fd); 243 close (fd);
301 /* ---------------------------------------- */
302#endif /* ! __QNX__ */
303 244
304 return 0; 245 return 0;
305} 246}
306 247
307#ifndef NO_SETOWNER_TTYDEV 248void
249ptytty::close_tty ()
250{
251 if (tty < 0)
252 return;
253
254 close (tty);
255 tty = -1;
256}
257
258bool
259ptytty::make_controlling_tty ()
260{
261 return control_tty (tty) >= 0;
262}
263
264void
265ptytty::set_utf8_mode (bool on)
266{
267#ifdef IUTF8
268 if (pty < 0)
269 return;
270
271 struct termios tio;
272
273 if (tcgetattr (pty, &tio) != -1)
274 {
275 tcflag_t new_cflag = tio.c_iflag;
276
277 if (on)
278 new_cflag |= IUTF8;
279 else
280 new_cflag &= ~IUTF8;
281
282 if (new_cflag != tio.c_iflag)
283 {
284 tio.c_iflag = new_cflag;
285 tcsetattr (pty, TCSANOW, &tio);
286 }
287 }
288#endif
289}
290
308static struct ttyconf { 291static struct ttyconf {
309 gid_t gid; 292 gid_t gid;
310 mode_t mode; 293 mode_t mode;
311 294
312 ttyconf () 295 ttyconf ()
313 { 296 {
314#ifdef TTY_GID_SUPPORT 297#ifdef TTY_GID_SUPPORT
315 struct group *gr = getgrnam ("tty"); 298 struct group *gr = getgrnam ("tty");
316 299
317 if (gr) 300 if (gr)
301 {
318 { /* change group ownership of tty to "tty" */ 302 /* change group ownership of tty to "tty" */
319 mode = S_IRUSR | S_IWUSR | S_IWGRP; 303 mode = S_IRUSR | S_IWUSR | S_IWGRP;
320 gid = gr->gr_gid; 304 gid = gr->gr_gid;
321 } 305 }
322 else 306 else
323#endif /* TTY_GID_SUPPORT */ 307#endif /* TTY_GID_SUPPORT */
324 { 308 {
325 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; 309 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
326 gid = getgid (); 310 gid = 0;
327 } 311 }
328 } 312 }
329} ttyconf; 313} ttyconf;
330 314
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
331void 331void
332rxvt_ptytty::privileges (rxvt_privaction action) 332ptytty_unix::put ()
333{ 333{
334 rxvt_privileges (RESTORE); 334 if (name)
335
336 if (action == SAVE)
337 {
338 //next_tty_action = RESTORE;
339# ifndef RESET_TTY_TO_COMMON_DEFAULTS
340 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
341 if (lstat (name, &savestat) < 0) /* you lose out */
342 ;//next_tty_action = IGNORE;
343 else
344# endif
345
346 {
347 chown (name, getuid (), ttyconf.gid); /* fail silently */
348 chmod (name, ttyconf.mode);
349# ifdef HAVE_REVOKE
350 revoke (name);
351# endif
352
353 }
354 } 335 {
355 else 336 chmod (name, RESTORE_TTY_MODE);
356 { /* action == RESTORE */
357 //next_tty_action = IGNORE;
358# ifndef RESET_TTY_TO_COMMON_DEFAULTS
359 chmod (name, savestat.st_mode);
360 chown (name, savestat.st_uid, savestat.st_gid);
361# else
362 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
363 chown (name, 0, 0); 337 chown (name, 0, ttyconf.gid);
364# endif
365
366 } 338 }
367 339
368 rxvt_privileges (IGNORE); 340 close_tty ();
369}
370#endif
371 341
372rxvt_ptytty::rxvt_ptytty () 342 if (pty >= 0)
373{ 343 close (pty);
344
345 free (name);
346
374 pty = tty = -1; 347 pty = tty = -1;
375 name = 0; 348 name = 0;
376} 349}
377 350
378rxvt_ptytty::~rxvt_ptytty ()
379{
380 put ();
381}
382
383void
384
385rxvt_ptytty::close_tty ()
386{
387 if (tty >= 0) close (tty);
388 tty = -1;
389}
390
391void
392rxvt_ptytty::put ()
393{
394#ifndef NO_SETOWNER_TTYDEV
395 if (tty >= 0)
396 privileges (RESTORE);
397#endif
398
399 if (pty >= 0) close (pty);
400 close_tty ();
401 free (name);
402
403 pty = tty = -1;
404 name = 0;
405}
406
407bool 351bool
408rxvt_ptytty::make_controlling_tty () 352ptytty_unix::get ()
409{
410 return control_tty (tty, name) >= 0;
411}
412
413bool
414rxvt_ptytty::get ()
415{ 353{
416 /* get master (pty) */ 354 /* get master (pty) */
417 if ((pty = get_pty (&tty, &name)) < 0) 355 if ((pty = get_pty (&tty, &name)) < 0)
418 return false; 356 return false;
419 357
… …
421 359
422 /* get slave (tty) */ 360 /* get slave (tty) */
423 if (tty < 0) 361 if (tty < 0)
424 { 362 {
425#ifndef NO_SETOWNER_TTYDEV 363#ifndef NO_SETOWNER_TTYDEV
426 privileges (SAVE); 364 chown (name, getuid (), ttyconf.gid); /* fail silently */
365 chmod (name, ttyconf.mode);
366# ifdef HAVE_REVOKE
367 revoke (name);
368# endif
427#endif 369#endif
428 370
429 if ((tty = get_tty (name)) < 0) 371 if ((tty = get_tty (name)) < 0)
430 { 372 {
431 put (); 373 put ();
… …
434 } 376 }
435 377
436 return true; 378 return true;
437} 379}
438 380
439/*----------------------- end-of-file (C source) -----------------------*/
440

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