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Comparing libptytty/src/ptytty.C (file contents):
Revision 1.1 by root, Sat Jan 21 21:40:00 2006 UTC vs.
Revision 1.33 by ayin, Thu Dec 13 14:42:33 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#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)
73
73static int 74 static int
74get_pty (int *fd_tty, char **ttydev) 75 get_pty (int *fd_tty, char **ttydev)
75{ 76 {
76 int pfd; 77 int pfd;
77 78
78#ifdef PTYS_ARE_OPENPTY 79# if defined(HAVE_GETPT)
79 char tty_name[sizeof "/dev/pts/????\0"];
80
81 if (openpty (&pfd, fd_tty, tty_name, NULL, NULL) != -1)
82 {
83 *ttydev = strdup (tty_name);
84 return pfd;
85 }
86#endif
87
88#ifdef PTYS_ARE__GETPTY
89 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
90 if (*ttydev != NULL)
91 return pfd;
92#endif
93
94#ifdef PTYS_ARE_GETPTY
95 char *ptydev;
96
97 while ((ptydev = getpty ()) != NULL)
98 if ((pfd = open (ptydev, O_RDWR | O_NOCTTY, 0)) >= 0)
99 {
100 *ttydev = ptydev;
101 return pfd;
102 }
103#endif
104
105#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
106# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_PTMX)
107
108 {
109# ifdef PTYS_ARE_GETPT
110 pfd = getpt (); 80 pfd = getpt();
81# elif defined(HAVE_POSIX_OPENPT)
82 pfd = posix_openpt (O_RDWR);
111# else 83# else
112 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 84 pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0);
113# endif 85# endif
114 86
115 if (pfd >= 0) 87 if (pfd >= 0)
116 { 88 {
117 if (grantpt (pfd) == 0 /* change slave permissions */ 89 if (grantpt (pfd) == 0 /* change slave permissions */
118 && unlockpt (pfd) == 0) 90 && unlockpt (pfd) == 0)
91 {
119 { /* slave now unlocked */ 92 /* slave now unlocked */
120 *ttydev = strdup (ptsname (pfd)); /* get slave's name */ 93 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
121 return pfd; 94 return pfd;
122 } 95 }
96
123 close (pfd); 97 close (pfd);
124 } 98 }
125 }
126# endif
127#endif
128 99
129#ifdef PTYS_ARE_PTC 100 return -1;
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)
114 {
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 {
134 *ttydev = strdup (slave);
135 return pfd;
136 }
137
138 return -1;
139 }
140
141#elif defined(HAVE_DEV_PTC)
142
143 static int
144 get_pty (int *fd_tty, char **ttydev)
145 {
146 int pfd;
147
130 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) 148 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
131 { 149 {
132 *ttydev = strdup (ttyname (pfd)); 150 *ttydev = strdup (ttyname (pfd));
133 return pfd; 151 return pfd;
134 } 152 }
135#endif
136 153
137#ifdef PTYS_ARE_CLONE 154 return -1;
155 }
156
157#elif defined(HAVE_DEV_CLONE)
158
159 static int
160 get_pty (int *fd_tty, char **ttydev)
161 {
162 int pfd;
163
138 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 164 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
139 { 165 {
140 *ttydev = strdup (ptsname (pfd)); 166 *ttydev = strdup (ptsname (pfd));
141 return pfd; 167 return pfd;
142 } 168 }
143#endif
144 169
145#ifdef PTYS_ARE_NUMERIC 170 return -1;
171 }
172
173#else
174
175 /* Based on the code in openssh/openbsd-compat/bsd-openpty.c */
176 static int
177 get_pty (int *fd_tty, char **ttydev)
146 { 178 {
179 int pfd;
147 int idx; 180 int i;
148 char *c1, *c2; 181 char pty_name[32];
149 char pty_name[] = "/dev/ptyp???"; 182 char tty_name[32];
150 char tty_name[] = "/dev/ttyp???"; 183 const char *majors = "pqrstuvwxyzabcde";
184 const char *minors = "0123456789abcdef";
151 185
152 c1 = &(pty_name[sizeof (pty_name) - 4]);
153 c2 = &(tty_name[sizeof (tty_name) - 4]);
154 for (idx = 0; idx < 256; idx++) 186 for (i = 0; i < 256; i++)
155 { 187 {
156 sprintf (c1, "%d", idx); 188 snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]);
157 sprintf (c2, "%d", idx); 189 snprintf(tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]);
158 if (access (tty_name, F_OK) < 0) 190
191 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
159 { 192 {
160 idx = 256; 193 snprintf(pty_name, 32, "/dev/ptyp%d", i);
161 break; 194 snprintf(tty_name, 32, "/dev/ttyp%d", i);
195 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
196 continue;
162 } 197 }
163 198
164 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 199 if (access (tty_name, R_OK | W_OK) == 0)
165 { 200 {
166 if (access (tty_name, R_OK | W_OK) == 0)
167 {
168 *ttydev = strdup (tty_name); 201 *ttydev = strdup (tty_name);
169 return pfd; 202 return pfd;
170 }
171
172 close (pfd);
173 } 203 }
174 }
175 }
176#endif
177 204
178#ifdef PTYS_ARE_SEARCHED 205 close (pfd);
179 {
180 const char *c1, *c2;
181 char pty_name[] = "/dev/pty??";
182 char tty_name[] = "/dev/tty??";
183
184# ifndef PTYCHAR1
185# define PTYCHAR1 "pqrstuvwxyz"
186# endif
187# ifndef PTYCHAR2
188# define PTYCHAR2 "0123456789abcdef"
189# endif
190
191 for (c1 = PTYCHAR1; *c1; c1++)
192 { 206 }
193 pty_name[ (sizeof (pty_name) - 3)] =
194 tty_name[ (sizeof (pty_name) - 3)] = *c1;
195 for (c2 = PTYCHAR2; *c2; c2++)
196 {
197 pty_name[ (sizeof (pty_name) - 2)] =
198 tty_name[ (sizeof (pty_name) - 2)] = *c2;
199 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
200 {
201 if (access (tty_name, R_OK | W_OK) == 0)
202 {
203 *ttydev = strdup (tty_name);
204 return pfd;
205 }
206 207
207 close (pfd);
208 }
209 }
210 }
211 }
212#endif
213
214 return -1; 208 return -1;
215} 209 }
210
211#endif
216 212
217/*----------------------------------------------------------------------*/ 213/*----------------------------------------------------------------------*/
218/* 214/*
219 * Returns tty file descriptor, or -1 on failure 215 * Returns tty file descriptor, or -1 on failure
220 */ 216 */
221static int 217static int
222get_tty (char *ttydev) 218get_tty (char *ttydev)
223{ 219{
224 return open (ttydev, O_RDWR | O_NOCTTY, 0); 220 return open (ttydev, O_RDWR | O_NOCTTY, 0);
… …
227/*----------------------------------------------------------------------*/ 223/*----------------------------------------------------------------------*/
228/* 224/*
229 * Make our tty a controlling tty so that /dev/tty points to us 225 * Make our tty a controlling tty so that /dev/tty points to us
230 */ 226 */
231static int 227static int
232control_tty (int fd_tty, const char *ttydev) 228control_tty (int fd_tty)
233{ 229{
234#ifndef __QNX__
235 int fd; 230 int fd;
236 231
237 /* ---------------------------------------- */
238# ifdef HAVE_SETSID
239 setsid (); 232 setsid ();
240# endif
241# if defined(HAVE_SETPGID)
242 setpgid (0, 0);
243# elif defined(HAVE_SETPGRP)
244 setpgrp (0, 0);
245# endif
246 233
247 /* ---------------------------------------- */
248# ifdef TIOCNOTTY
249 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
250 if (fd >= 0)
251 {
252 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
253 close (fd);
254 }
255# endif
256
257 /* ---------------------------------------- */
258 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
259 if (fd >= 0)
260 close (fd); /* ouch: still have controlling tty */
261
262 /* ---------------------------------------- */
263#if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 234#if defined(HAVE_DEV_PTMX) && defined(I_PUSH)
264 /* 235 /*
265 * Push STREAMS modules: 236 * Push STREAMS modules:
266 * ptem: pseudo-terminal hardware emulation module. 237 * ptem: pseudo-terminal hardware emulation module.
267 * ldterm: standard terminal line discipline. 238 * ldterm: standard terminal line discipline.
268 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 239 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
… …
285 ioctl (fd_tty, I_PUSH, "ptem"); 256 ioctl (fd_tty, I_PUSH, "ptem");
286 ioctl (fd_tty, I_PUSH, "ldterm"); 257 ioctl (fd_tty, I_PUSH, "ldterm");
287 ioctl (fd_tty, I_PUSH, "ttcompat"); 258 ioctl (fd_tty, I_PUSH, "ttcompat");
288 } 259 }
289#endif 260#endif
290 /* ---------------------------------------- */ 261
291# if defined(TIOCSCTTY) 262#ifdef TIOCSCTTY
292 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 263 ioctl (fd_tty, TIOCSCTTY, NULL);
293# elif defined(TIOCSETCTTY)
294 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
295# else 264#else
296 fd = open (ttydev, O_RDWR); 265 fd = open (ttyname (fd_tty), O_RDWR);
297 if (fd >= 0) 266 if (fd >= 0)
298 close (fd); 267 close (fd);
299# endif 268#endif
300 /* ---------------------------------------- */ 269
301 fd = open ("/dev/tty", O_WRONLY); 270 fd = open ("/dev/tty", O_WRONLY);
302 if (fd < 0) 271 if (fd < 0)
303 return -1; /* fatal */ 272 return -1; /* fatal */
273
304 close (fd); 274 close (fd);
305 /* ---------------------------------------- */
306#endif /* ! __QNX__ */
307 275
308 return 0; 276 return 0;
309} 277}
310 278
311#ifndef NO_SETOWNER_TTYDEV 279void
280ptytty::close_tty ()
281{
282 if (tty < 0)
283 return;
284
285 close (tty);
286 tty = -1;
287}
288
289bool
290ptytty::make_controlling_tty ()
291{
292 return control_tty (tty) >= 0;
293}
294
295void
296ptytty::set_utf8_mode (bool on)
297{
298#ifdef IUTF8
299 if (pty < 0)
300 return;
301
302 struct termios tio;
303
304 if (tcgetattr (pty, &tio) != -1)
305 {
306 tcflag_t new_cflag = tio.c_iflag;
307
308 if (on)
309 new_cflag |= IUTF8;
310 else
311 new_cflag &= ~IUTF8;
312
313 if (new_cflag != tio.c_iflag)
314 {
315 tio.c_iflag = new_cflag;
316 tcsetattr (pty, TCSANOW, &tio);
317 }
318 }
319#endif
320}
321
312static struct ttyconf { 322static struct ttyconf {
313 gid_t gid; 323 gid_t gid;
314 mode_t mode; 324 mode_t mode;
315 325
316 ttyconf () 326 ttyconf ()
317 { 327 {
318#ifdef TTY_GID_SUPPORT 328#ifdef TTY_GID_SUPPORT
319 struct group *gr = getgrnam ("tty"); 329 struct group *gr = getgrnam ("tty");
320 330
321 if (gr) 331 if (gr)
332 {
322 { /* change group ownership of tty to "tty" */ 333 /* change group ownership of tty to "tty" */
323 mode = S_IRUSR | S_IWUSR | S_IWGRP; 334 mode = S_IRUSR | S_IWUSR | S_IWGRP;
324 gid = gr->gr_gid; 335 gid = gr->gr_gid;
325 } 336 }
326 else 337 else
327#endif /* TTY_GID_SUPPORT */ 338#endif /* TTY_GID_SUPPORT */
328 { 339 {
329 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; 340 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
330 gid = getgid (); 341 gid = 0;
331 } 342 }
332 } 343 }
333} ttyconf; 344} ttyconf;
334 345
346ptytty_unix::ptytty_unix ()
347{
348 name = 0;
349#if UTMP_SUPPORT
350 cmd_pid = 0;
351#endif
352}
353
354ptytty_unix::~ptytty_unix ()
355{
356#if UTMP_SUPPORT
357 logout ();
358#endif
359 put ();
360}
361
335void 362void
336rxvt_ptytty::privileges (rxvt_privaction action) 363ptytty_unix::put ()
337{ 364{
338 if (!name || !*name) 365 if (name)
339 return;
340
341 rxvt_privileges (RESTORE);
342
343 if (action == SAVE)
344 { 366 {
345# ifndef RESET_TTY_TO_COMMON_DEFAULTS 367 chmod (name, RESTORE_TTY_MODE);
346 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
347 if (lstat (name, &savestat) < 0) /* you lose out */
348 ;
349 else
350# endif
351 {
352 saved = true;
353 chown (name, getuid (), ttyconf.gid); /* fail silently */
354 chmod (name, ttyconf.mode); 368 chown (name, 0, ttyconf.gid);
355# ifdef HAVE_REVOKE
356 revoke (name);
357# endif
358 }
359 } 369 }
360 else
361 { /* action == RESTORE */
362# ifndef RESET_TTY_TO_COMMON_DEFAULTS
363 if (saved)
364 {
365 chmod (name, savestat.st_mode);
366 chown (name, savestat.st_uid, savestat.st_gid);
367 }
368# else
369 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
370 chown (name, 0, 0);
371# endif
372 370
373 } 371 close_tty ();
374 372
375 rxvt_privileges (IGNORE); 373 if (pty >= 0)
376} 374 close (pty);
377#endif
378 375
379rxvt_ptytty::rxvt_ptytty () 376 free (name);
380{ 377
381 pty = tty = -1; 378 pty = tty = -1;
382 name = 0; 379 name = 0;
383#ifndef NO_SETOWNER_TTYDEV
384 saved = false;
385#endif
386}
387
388rxvt_ptytty::~rxvt_ptytty ()
389{
390 put ();
391}
392
393void
394
395rxvt_ptytty::close_tty ()
396{
397 if (tty >= 0) close (tty);
398 tty = -1;
399}
400
401void
402rxvt_ptytty::put ()
403{
404#ifndef NO_SETOWNER_TTYDEV
405 if (tty >= 0)
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} 380}
416 381
417bool 382bool
418rxvt_ptytty::make_controlling_tty () 383ptytty_unix::get ()
419{
420 return control_tty (tty, name) >= 0;
421}
422
423bool
424rxvt_ptytty::get ()
425{ 384{
426 /* get master (pty) */ 385 /* get master (pty) */
427 if ((pty = get_pty (&tty, &name)) < 0) 386 if ((pty = get_pty (&tty, &name)) < 0)
428 return false; 387 return false;
429 388
… …
431 390
432 /* get slave (tty) */ 391 /* get slave (tty) */
433 if (tty < 0) 392 if (tty < 0)
434 { 393 {
435#ifndef NO_SETOWNER_TTYDEV 394#ifndef NO_SETOWNER_TTYDEV
436 privileges (SAVE); 395 chown (name, getuid (), ttyconf.gid); /* fail silently */
396 chmod (name, ttyconf.mode);
397# ifdef HAVE_REVOKE
398 revoke (name);
399# endif
437#endif 400#endif
438 401
439 if ((tty = get_tty (name)) < 0) 402 if ((tty = get_tty (name)) < 0)
440 { 403 {
441 put (); 404 put ();
… …
444 } 407 }
445 408
446 return true; 409 return true;
447} 410}
448 411
449void
450rxvt_ptytty::set_utf8_mode (bool on)
451{
452#ifdef IUTF8
453 if (pty != -1)
454 {
455 struct termios tio;
456
457 if (tcgetattr (pty, &tio) != -1)
458 {
459 tcflag_t new_cflag = tio.c_iflag;
460
461 if (on)
462 new_cflag |= IUTF8;
463 else
464 new_cflag &= ~IUTF8;
465
466 if (new_cflag != tio.c_iflag)
467 {
468 tio.c_iflag = new_cflag;
469 tcsetattr (pty, TCSANOW, &tio);
470 }
471 }
472 }
473#endif
474}
475
476/*----------------------- end-of-file (C source) -----------------------*/
477

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