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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 1.68 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 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 49#if defined(HAVE_PTY_H)
52#if defined( __FreeBSD__) 50# include <pty.h>
53// better do this via configure, but.... 51#elif defined(HAVE_LIBUTIL_H)
54# include <libutil.h> 52# include <libutil.h>
53#elif defined(HAVE_UTIL_H)
54# include <util.h>
55#endif
56#ifdef TTY_GID_SUPPORT
57#include <grp.h>
55#endif 58#endif
56 59
57#include <cstdio> 60#include <cstdio>
58#include <grp.h> 61
62/////////////////////////////////////////////////////////////////////////////
59 63
60/* ------------------------------------------------------------------------- * 64/* ------------------------------------------------------------------------- *
61 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 65 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
62 * ------------------------------------------------------------------------- */ 66 * ------------------------------------------------------------------------- */
63/* 67/*
64 * Returns pty file descriptor, or -1 on failure 68 * Returns pty file descriptor, or -1 on failure
65 * 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.
66 * 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
67 */ 71 */
72#if defined(UNIX98_PTY)
73
68static int 74 static int
69get_pty (int *fd_tty, char **ttydev) 75 get_pty (int *fd_tty, char **ttydev)
70{ 76 {
71 int pfd; 77 int pfd;
72 78
73#ifdef PTYS_ARE_OPENPTY 79# if defined(HAVE_GETPT)
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 {
105# ifdef PTYS_ARE_GETPT
106 pfd = getpt (); 80 pfd = getpt();
81# elif defined(HAVE_POSIX_OPENPT)
82 pfd = posix_openpt (O_RDWR);
107# else 83# else
108 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 84 pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0);
109# endif 85# endif
110 86
111 if (pfd >= 0) 87 if (pfd >= 0)
112 { 88 {
113 if (grantpt (pfd) == 0 /* change slave permissions */ 89 if (grantpt (pfd) == 0 /* change slave permissions */
114 && unlockpt (pfd) == 0) 90 && unlockpt (pfd) == 0)
91 {
115 { /* slave now unlocked */ 92 /* slave now unlocked */
116 *ttydev = strdup (ptsname (pfd)); /* get slave's name */ 93 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
117 return pfd; 94 return pfd;
118 } 95 }
96
119 close (pfd); 97 close (pfd);
120 } 98 }
121 }
122# endif
123#endif
124 99
125#ifdef PTYS_ARE_PTC 100 return -1;
126 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)
127 { 114 {
128 *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);
129 return pfd; 134 return pfd;
130 } 135 }
131#endif
132 136
133#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
134 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 147 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
135 {
136 *ttydev = strdup (ptsname (pfd));
137 return pfd;
138 }
139#endif
140
141#ifdef PTYS_ARE_NUMERIC
142 {
143 int idx;
144 char *c1, *c2;
145 char pty_name[] = "/dev/ptyp???";
146 char tty_name[] = "/dev/ttyp???";
147
148 c1 = &(pty_name[sizeof (pty_name) - 4]);
149 c2 = &(tty_name[sizeof (tty_name) - 4]);
150 for (idx = 0; idx < 256; idx++)
151 { 148 {
152 sprintf (c1, "%d", idx); 149 *ttydev = strdup (ttyname (pfd));
153 sprintf (c2, "%d", idx); 150 return pfd;
154 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)
155 { 191 {
156 idx = 256; 192 snprintf(pty_name, 32, "/dev/ptyp%d", i);
157 break; 193 snprintf(tty_name, 32, "/dev/ttyp%d", i);
194 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
195 continue;
158 } 196 }
159 197
160 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 198 if (access (tty_name, R_OK | W_OK) == 0)
161 { 199 {
162 if (access (tty_name, R_OK | W_OK) == 0)
163 {
164 *ttydev = strdup (tty_name); 200 *ttydev = strdup (tty_name);
165 return pfd; 201 return pfd;
166 }
167
168 close (pfd);
169 } 202 }
203
204 close (pfd);
170 } 205 }
171 }
172#endif
173 206
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
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; 207 return -1;
211} 208 }
209
210#endif
212 211
213/*----------------------------------------------------------------------*/ 212/*----------------------------------------------------------------------*/
214/* 213/*
215 * Returns tty file descriptor, or -1 on failure 214 * Returns tty file descriptor, or -1 on failure
216 */ 215 */
217static int 216static int
218get_tty (char *ttydev) 217get_tty (char *ttydev)
219{ 218{
220 return open (ttydev, O_RDWR | O_NOCTTY, 0); 219 return open (ttydev, O_RDWR | O_NOCTTY, 0);
… …
223/*----------------------------------------------------------------------*/ 222/*----------------------------------------------------------------------*/
224/* 223/*
225 * Make our tty a controlling tty so that /dev/tty points to us 224 * Make our tty a controlling tty so that /dev/tty points to us
226 */ 225 */
227static int 226static int
228control_tty (int fd_tty, const char *ttydev) 227control_tty (int fd_tty)
229{ 228{
230#ifndef __QNX__
231 int fd; 229 int fd;
232 230
233 /* ---------------------------------------- */
234# ifdef HAVE_SETSID
235 setsid (); 231 setsid ();
236# endif
237# if defined(HAVE_SETPGID)
238 setpgid (0, 0);
239# elif defined(HAVE_SETPGRP)
240 setpgrp (0, 0);
241# endif
242 232
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) 233#if defined(HAVE_DEV_PTMX) && defined(I_PUSH)
260 /* 234 /*
261 * Push STREAMS modules: 235 * Push STREAMS modules:
262 * ptem: pseudo-terminal hardware emulation module. 236 * ptem: pseudo-terminal hardware emulation module.
263 * ldterm: standard terminal line discipline. 237 * ldterm: standard terminal line discipline.
264 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 238 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
… …
281 ioctl (fd_tty, I_PUSH, "ptem"); 255 ioctl (fd_tty, I_PUSH, "ptem");
282 ioctl (fd_tty, I_PUSH, "ldterm"); 256 ioctl (fd_tty, I_PUSH, "ldterm");
283 ioctl (fd_tty, I_PUSH, "ttcompat"); 257 ioctl (fd_tty, I_PUSH, "ttcompat");
284 } 258 }
285#endif 259#endif
286 /* ---------------------------------------- */ 260
287# if defined(TIOCSCTTY) 261#ifdef TIOCSCTTY
288 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 262 ioctl (fd_tty, TIOCSCTTY, NULL);
289# elif defined(TIOCSETCTTY)
290 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
291# else 263#else
292 fd = open (ttydev, O_RDWR); 264 fd = open (ttyname (fd_tty), O_RDWR);
293 if (fd >= 0) 265 if (fd >= 0)
294 close (fd); 266 close (fd);
295# endif 267#endif
296 /* ---------------------------------------- */ 268
297 fd = open ("/dev/tty", O_WRONLY); 269 fd = open ("/dev/tty", O_WRONLY);
298 if (fd < 0) 270 if (fd < 0)
299 return -1; /* fatal */ 271 return -1; /* fatal */
272
300 close (fd); 273 close (fd);
301 /* ---------------------------------------- */
302#endif /* ! __QNX__ */
303 274
304 return 0; 275 return 0;
305} 276}
306 277
307#ifndef NO_SETOWNER_TTYDEV 278void
279ptytty::close_tty ()
280{
281 if (tty < 0)
282 return;
283
284 close (tty);
285 tty = -1;
286}
287
288bool
289ptytty::make_controlling_tty ()
290{
291 return control_tty (tty) >= 0;
292}
293
294void
295ptytty::set_utf8_mode (bool on)
296{
297#ifdef IUTF8
298 if (pty < 0)
299 return;
300
301 struct termios tio;
302
303 if (tcgetattr (pty, &tio) != -1)
304 {
305 tcflag_t new_cflag = tio.c_iflag;
306
307 if (on)
308 new_cflag |= IUTF8;
309 else
310 new_cflag &= ~IUTF8;
311
312 if (new_cflag != tio.c_iflag)
313 {
314 tio.c_iflag = new_cflag;
315 tcsetattr (pty, TCSANOW, &tio);
316 }
317 }
318#endif
319}
320
308static struct ttyconf { 321static struct ttyconf {
309 gid_t gid; 322 gid_t gid;
310 mode_t mode; 323 mode_t mode;
311 324
312 ttyconf () 325 ttyconf ()
313 { 326 {
314#ifdef TTY_GID_SUPPORT 327#ifdef TTY_GID_SUPPORT
315 struct group *gr = getgrnam ("tty"); 328 struct group *gr = getgrnam ("tty");
316 329
317 if (gr) 330 if (gr)
331 {
318 { /* change group ownership of tty to "tty" */ 332 /* change group ownership of tty to "tty" */
319 mode = S_IRUSR | S_IWUSR | S_IWGRP; 333 mode = S_IRUSR | S_IWUSR | S_IWGRP;
320 gid = gr->gr_gid; 334 gid = gr->gr_gid;
321 } 335 }
322 else 336 else
323#endif /* TTY_GID_SUPPORT */ 337#endif /* TTY_GID_SUPPORT */
324 { 338 {
325 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; 339 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
326 gid = getgid (); 340 gid = 0;
327 } 341 }
328 } 342 }
329} ttyconf; 343} ttyconf;
330 344
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}
360
331void 361void
332rxvt_ptytty::privileges (rxvt_privaction action) 362ptytty_unix::put ()
333{ 363{
334 rxvt_privileges (RESTORE); 364 if (name)
335
336 if (action == SAVE)
337 { 365 {
338 //next_tty_action = RESTORE; 366 chmod (name, RESTORE_TTY_MODE);
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 }
355 else
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); 367 chown (name, 0, ttyconf.gid);
364# endif
365
366 } 368 }
367 369
368 rxvt_privileges (IGNORE); 370 close_tty ();
369}
370#endif
371 371
372rxvt_ptytty::rxvt_ptytty () 372 if (pty >= 0)
373{ 373 close (pty);
374
375 free (name);
376
374 pty = tty = -1; 377 pty = tty = -1;
375 name = 0; 378 name = 0;
376} 379}
377 380
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 381bool
408rxvt_ptytty::make_controlling_tty () 382ptytty_unix::get ()
409{
410 return control_tty (tty, name) >= 0;
411}
412
413bool
414rxvt_ptytty::get ()
415{ 383{
416 /* get master (pty) */ 384 /* get master (pty) */
417 if ((pty = get_pty (&tty, &name)) < 0) 385 if ((pty = get_pty (&tty, &name)) < 0)
418 return false; 386 return false;
419 387
… …
421 389
422 /* get slave (tty) */ 390 /* get slave (tty) */
423 if (tty < 0) 391 if (tty < 0)
424 { 392 {
425#ifndef NO_SETOWNER_TTYDEV 393#ifndef NO_SETOWNER_TTYDEV
426 privileges (SAVE); 394 chown (name, getuid (), ttyconf.gid); /* fail silently */
395 chmod (name, ttyconf.mode);
396# ifdef HAVE_REVOKE
397 revoke (name);
398# endif
427#endif 399#endif
428 400
429 if ((tty = get_tty (name)) < 0) 401 if ((tty = get_tty (name)) < 0)
430 { 402 {
431 put (); 403 put ();
… …
434 } 406 }
435 407
436 return true; 408 return true;
437} 409}
438 410
439/*----------------------- end-of-file (C source) -----------------------*/
440

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