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Comparing libptytty/src/ptytty.C (file contents):
Revision 1.28 by ayin, Tue Jun 26 21:29:30 2007 UTC vs.
Revision 1.42 by sf-exg, Fri Nov 11 15:15:00 2011 UTC

… …
5 * File: ptytty.C 5 * File: ptytty.C
6 *----------------------------------------------------------------------* 6 *----------------------------------------------------------------------*
7 * 7 *
8 * All portions of code are copyright by their respective author/s. 8 * All portions of code are copyright by their respective author/s.
9 * Copyright (c) 1999-2001 Geoff Wing <gcw@pobox.com> 9 * Copyright (c) 1999-2001 Geoff Wing <gcw@pobox.com>
10 * Copyright (c) 2004-2006 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> 11 * Copyright (c) 2006 Emanuele Giaquinta <e.giaquinta@glauco.it>
12 * 12 *
13 * 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
14 * 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
15 * the Free Software Foundation; either version 2 of the License, or 15 * the Free Software Foundation; either version 2 of the License, or
… …
23 * 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
24 * along with this program; if not, write to the Free Software 24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 25 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 *---------------------------------------------------------------------*/ 26 *---------------------------------------------------------------------*/
27 27
28#include "../config.h" 28#include "config.h"
29 29
30#include "ptytty.h" 30#include "ptytty.h"
31 31
32#include <cstdlib> 32#include <cstdlib>
33#include <cstring> 33#include <cstring>
34#include <csignal> 34#include <csignal>
35 35
36#include <sys/types.h> 36#include <sys/types.h>
37#include <sys/stat.h>
37#include <unistd.h> 38#include <unistd.h>
38#include <fcntl.h> 39#include <fcntl.h>
39 40
40#ifdef HAVE_SYS_IOCTL_H 41#ifdef HAVE_SYS_IOCTL_H
41# include <sys/ioctl.h> 42# include <sys/ioctl.h>
42#endif 43#endif
43#if defined(HAVE_DEV_PTMX) && defined(HAVE_SYS_STROPTS_H) 44#if defined(HAVE_SYS_STROPTS_H)
44# include <sys/stropts.h> /* for I_PUSH */ 45# include <sys/stropts.h> /* for I_PUSH */
45#endif 46#endif
46#ifdef HAVE_ISASTREAM 47#if defined(HAVE_ISASTREAM) && defined(HAVE_STROPTS_H)
47# include <stropts.h> 48# include <stropts.h>
48#endif 49#endif
49#if defined(HAVE_PTY_H) 50#if defined(HAVE_PTY_H)
50# include <pty.h> 51# include <pty.h>
51#elif defined(HAVE_LIBUTIL_H) 52#elif defined(HAVE_LIBUTIL_H)
… …
77 int pfd; 78 int pfd;
78 79
79# if defined(HAVE_GETPT) 80# if defined(HAVE_GETPT)
80 pfd = getpt(); 81 pfd = getpt();
81# elif defined(HAVE_POSIX_OPENPT) 82# elif defined(HAVE_POSIX_OPENPT)
82 pfd = posix_openpt (O_RDWR); 83 pfd = posix_openpt (O_RDWR | O_NOCTTY);
83# else 84# else
85# ifdef _AIX
84 pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0); 86 pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0);
87# else
88 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
89# endif
85# endif 90# endif
86 91
87 if (pfd >= 0) 92 if (pfd >= 0)
88 { 93 {
89 if (grantpt (pfd) == 0 /* change slave permissions */ 94 if (grantpt (pfd) == 0 /* change slave permissions */
90 && unlockpt (pfd) == 0) 95 && unlockpt (pfd) == 0)
96 {
91 { /* slave now unlocked */ 97 /* slave now unlocked */
92 *ttydev = strdup (ptsname (pfd)); /* get slave's name */ 98 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
93 return pfd; 99 return pfd;
94 } 100 }
95 101
96 close (pfd); 102 close (pfd);
… …
104 static int 110 static int
105 get_pty (int *fd_tty, char **ttydev) 111 get_pty (int *fd_tty, char **ttydev)
106 { 112 {
107 int pfd; 113 int pfd;
108 int res; 114 int res;
109 char tty_name[32];
110 115
111 res = openpty (&pfd, fd_tty, tty_name, NULL, NULL); 116 res = openpty (&pfd, fd_tty, NULL, NULL, NULL);
112 117
113 if (res != -1) 118 if (res != -1)
114 { 119 {
115 *ttydev = strdup (tty_name); 120 *ttydev = strdup (ttyname (*fd_tty));
116 return pfd; 121 return pfd;
117 } 122 }
118 123
119 return -1; 124 return -1;
120 } 125 }
… …
123 128
124 static int 129 static int
125 get_pty (int *fd_tty, char **ttydev) 130 get_pty (int *fd_tty, char **ttydev)
126 { 131 {
127 int pfd; 132 int pfd;
133 char *slave;
128 134
129 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); 135 slave = _getpty (&pfd, O_RDWR | O_NOCTTY, 0622, 0);
130 136
131 if (*ttydev != NULL) 137 if (slave != NULL)
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 { 138 {
146 *ttydev = strdup (ttyname (pfd));
147 return pfd;
148 }
149
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
160 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
161 {
162 *ttydev = strdup (ptsname (pfd)); 139 *ttydev = strdup (slave);
163 return pfd; 140 return pfd;
164 } 141 }
165 142
166 return -1; 143 return -1;
167 } 144 }
… …
225{ 202{
226 int fd; 203 int fd;
227 204
228 setsid (); 205 setsid ();
229 206
230#if defined(HAVE_DEV_PTMX) && defined(I_PUSH) 207#ifdef TIOCSCTTY
208 ioctl (fd_tty, TIOCSCTTY, NULL);
209#else
210 fd = open (ttyname (fd_tty), O_RDWR);
211 if (fd >= 0)
212 close (fd);
213#endif
214
215 fd = open ("/dev/tty", O_WRONLY);
216 if (fd < 0)
217 return -1; /* fatal */
218
219 close (fd);
220
221 return 0;
222}
223
224void
225ptytty::close_tty ()
226{
227 if (tty < 0)
228 return;
229
230 close (tty);
231 tty = -1;
232}
233
234bool
235ptytty::make_controlling_tty ()
236{
237 return control_tty (tty) >= 0;
238}
239
240void
241ptytty::set_utf8_mode (bool on)
242{
243#ifdef IUTF8
244 if (pty < 0)
245 return;
246
247 struct termios tio;
248
249 if (tcgetattr (pty, &tio) != -1)
250 {
251 tcflag_t new_cflag = tio.c_iflag;
252
253 if (on)
254 new_cflag |= IUTF8;
255 else
256 new_cflag &= ~IUTF8;
257
258 if (new_cflag != tio.c_iflag)
259 {
260 tio.c_iflag = new_cflag;
261 tcsetattr (pty, TCSANOW, &tio);
262 }
263 }
264#endif
265}
266
267static struct ttyconf {
268 gid_t gid;
269 mode_t mode;
270
271 ttyconf ()
272 {
273#ifdef TTY_GID_SUPPORT
274 struct group *gr = getgrnam ("tty");
275
276 if (gr)
277 {
278 /* change group ownership of tty to "tty" */
279 mode = S_IRUSR | S_IWUSR | S_IWGRP;
280 gid = gr->gr_gid;
281 }
282 else
283#endif /* TTY_GID_SUPPORT */
284 {
285 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
286 gid = 0;
287 }
288 }
289} ttyconf;
290
291ptytty_unix::ptytty_unix ()
292{
293 name = 0;
294#if UTMP_SUPPORT
295 cmd_pid = 0;
296#endif
297}
298
299ptytty_unix::~ptytty_unix ()
300{
301#if UTMP_SUPPORT
302 logout ();
303#endif
304 put ();
305}
306
307void
308ptytty_unix::put ()
309{
310 if (name)
311 {
312 chmod (name, RESTORE_TTY_MODE);
313 chown (name, 0, ttyconf.gid);
314 }
315
316 close_tty ();
317
318 if (pty >= 0)
319 close (pty);
320
321 free (name);
322
323 pty = tty = -1;
324 name = 0;
325}
326
327bool
328ptytty_unix::get ()
329{
330 /* get master (pty) */
331 if ((pty = get_pty (&tty, &name)) < 0)
332 return false;
333
334 fcntl (pty, F_SETFL, O_NONBLOCK);
335
336 /* get slave (tty) */
337 if (tty < 0)
338 {
339#ifndef NO_SETOWNER_TTYDEV
340 chown (name, getuid (), ttyconf.gid); /* fail silently */
341 chmod (name, ttyconf.mode);
342# ifdef HAVE_REVOKE
343 revoke (name);
344# endif
345#endif
346
347 if ((tty = get_tty (name)) < 0)
348 {
349 put ();
350 return false;
351 }
352 }
353
354#if defined(I_PUSH)
231 /* 355 /*
232 * Push STREAMS modules: 356 * Push STREAMS modules:
233 * ptem: pseudo-terminal hardware emulation module. 357 * ptem: pseudo-terminal hardware emulation module.
234 * ldterm: standard terminal line discipline. 358 * ldterm: standard terminal line discipline.
235 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 359 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
236 * 360 *
237 * After we push the STREAMS modules, the first open () on the slave side 361 * After we push the STREAMS modules, the first open () on the slave side
238 * (i.e. the next section between the dashes giving us "tty opened OK")
239 * should make the "ptem" (or "ldterm" depending upon either which OS 362 * should make the "ptem" (or "ldterm" depending upon either which OS
240 * version or which set of manual pages you have) module give us a 363 * version or which set of manual pages you have) module give us a
241 * controlling terminal. We must already have close ()d the master side 364 * controlling terminal. We must already have close ()d the master side
242 * fd in this child process before we push STREAMS modules on because the 365 * fd in this child process before we push STREAMS modules on because the
243 * documentation is really unclear about whether it is any close () on 366 * documentation is really unclear about whether it is any close () on
244 * the master side or the last close () - i.e. a proper STREAMS dismantling 367 * the master side or the last close () - i.e. a proper STREAMS dismantling
245 * close () - on the master side which causes a hang up to be sent 368 * close () - on the master side which causes a hang up to be sent
246 * through - Geoff Wing 369 * through - Geoff Wing
247 */ 370 */
248# ifdef HAVE_ISASTREAM 371#if defined(HAVE_ISASTREAM) && defined(HAVE_STROPTS_H)
249 if (isastream (fd_tty) == 1) 372 if (isastream (tty) == 1)
250# endif 373# endif
251 { 374 {
252 ioctl (fd_tty, I_PUSH, "ptem"); 375 ioctl (tty, I_PUSH, "ptem");
253 ioctl (fd_tty, I_PUSH, "ldterm"); 376 ioctl (tty, I_PUSH, "ldterm");
254 ioctl (fd_tty, I_PUSH, "ttcompat"); 377 ioctl (tty, I_PUSH, "ttcompat");
255 }
256#endif
257
258#ifdef TIOCSCTTY
259 ioctl (fd_tty, TIOCSCTTY, NULL);
260#else
261 fd = open (ttyname (fd_tty), O_RDWR);
262 if (fd >= 0)
263 close (fd);
264#endif
265
266 fd = open ("/dev/tty", O_WRONLY);
267 if (fd < 0)
268 return -1; /* fatal */
269
270 close (fd);
271
272 return 0;
273}
274
275void
276ptytty::close_tty ()
277{
278 if (tty < 0)
279 return;
280
281 close (tty);
282 tty = -1;
283}
284
285bool
286ptytty::make_controlling_tty ()
287{
288 return control_tty (tty) >= 0;
289}
290
291void
292ptytty::set_utf8_mode (bool on)
293{
294#ifdef IUTF8
295 if (pty < 0)
296 return;
297
298 struct termios tio;
299
300 if (tcgetattr (pty, &tio) != -1)
301 { 378 }
302 tcflag_t new_cflag = tio.c_iflag;
303
304 if (on)
305 new_cflag |= IUTF8;
306 else
307 new_cflag &= ~IUTF8;
308
309 if (new_cflag != tio.c_iflag)
310 {
311 tio.c_iflag = new_cflag;
312 tcsetattr (pty, TCSANOW, &tio);
313 }
314 }
315#endif
316}
317
318static struct ttyconf {
319 gid_t gid;
320 mode_t mode;
321
322 ttyconf ()
323 {
324#ifdef TTY_GID_SUPPORT
325 struct group *gr = getgrnam ("tty");
326
327 if (gr)
328 { /* change group ownership of tty to "tty" */
329 mode = S_IRUSR | S_IWUSR | S_IWGRP;
330 gid = gr->gr_gid;
331 }
332 else
333#endif /* TTY_GID_SUPPORT */
334 {
335 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
336 gid = 0;
337 }
338 }
339} ttyconf;
340
341ptytty_unix::ptytty_unix ()
342{
343 name = 0;
344#if UTMP_SUPPORT
345 cmd_pid = 0;
346#endif
347}
348
349ptytty_unix::~ptytty_unix ()
350{
351#if UTMP_SUPPORT
352 logout ();
353#endif
354 put ();
355}
356
357void
358ptytty_unix::put ()
359{
360 if (name)
361 {
362 chmod (name, RESTORE_TTY_MODE);
363 chown (name, 0, ttyconf.gid);
364 }
365
366 close_tty ();
367
368 if (pty >= 0)
369 close (pty);
370
371 free (name);
372
373 pty = tty = -1;
374 name = 0;
375}
376
377bool
378ptytty_unix::get ()
379{
380 /* get master (pty) */
381 if ((pty = get_pty (&tty, &name)) < 0)
382 return false;
383
384 fcntl (pty, F_SETFL, O_NONBLOCK);
385
386 /* get slave (tty) */
387 if (tty < 0)
388 {
389#ifndef NO_SETOWNER_TTYDEV
390 chown (name, getuid (), ttyconf.gid); /* fail silently */
391 chmod (name, ttyconf.mode);
392# ifdef HAVE_REVOKE
393 revoke (name);
394# endif 379#endif
395#endif
396
397 if ((tty = get_tty (name)) < 0)
398 {
399 put ();
400 return false;
401 }
402 }
403 380
404 return true; 381 return true;
405} 382}
406 383

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