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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 1.46 by sf-exg, Tue Dec 20 21:03:21 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 <cstdio>
33#include <cstring> 34#include <cstring>
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)
… …
54# include <util.h> 55# include <util.h>
55#endif 56#endif
56#ifdef TTY_GID_SUPPORT 57#ifdef TTY_GID_SUPPORT
57#include <grp.h> 58#include <grp.h>
58#endif 59#endif
59
60#include <cstdio>
61 60
62///////////////////////////////////////////////////////////////////////////// 61/////////////////////////////////////////////////////////////////////////////
63 62
64/* ------------------------------------------------------------------------- * 63/* ------------------------------------------------------------------------- *
65 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 64 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
… …
75 get_pty (int *fd_tty, char **ttydev) 74 get_pty (int *fd_tty, char **ttydev)
76 { 75 {
77 int pfd; 76 int pfd;
78 77
79# if defined(HAVE_GETPT) 78# if defined(HAVE_GETPT)
80 pfd = getpt(); 79 pfd = getpt ();
81# elif defined(HAVE_POSIX_OPENPT) 80# elif defined(HAVE_POSIX_OPENPT)
82 pfd = posix_openpt (O_RDWR); 81 pfd = posix_openpt (O_RDWR | O_NOCTTY);
83# else 82# else
83# ifdef _AIX
84 pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0); 84 pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0);
85# else
86 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
87# endif
85# endif 88# endif
86 89
87 if (pfd >= 0) 90 if (pfd >= 0)
88 { 91 {
89 if (grantpt (pfd) == 0 /* change slave permissions */ 92 if (grantpt (pfd) == 0 /* change slave permissions */
90 && unlockpt (pfd) == 0) 93 && unlockpt (pfd) == 0)
94 {
91 { /* slave now unlocked */ 95 /* slave now unlocked */
92 *ttydev = strdup (ptsname (pfd)); /* get slave's name */ 96 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
93 return pfd; 97 return pfd;
94 } 98 }
95 99
96 close (pfd); 100 close (pfd);
… …
104 static int 108 static int
105 get_pty (int *fd_tty, char **ttydev) 109 get_pty (int *fd_tty, char **ttydev)
106 { 110 {
107 int pfd; 111 int pfd;
108 int res; 112 int res;
109 char tty_name[32];
110 113
111 res = openpty (&pfd, fd_tty, tty_name, NULL, NULL); 114 res = openpty (&pfd, fd_tty, NULL, NULL, NULL);
112 115
113 if (res != -1) 116 if (res != -1)
114 { 117 {
115 *ttydev = strdup (tty_name); 118 *ttydev = strdup (ttyname (*fd_tty));
116 return pfd; 119 return pfd;
117 } 120 }
118 121
119 return -1; 122 return -1;
120 } 123 }
… …
123 126
124 static int 127 static int
125 get_pty (int *fd_tty, char **ttydev) 128 get_pty (int *fd_tty, char **ttydev)
126 { 129 {
127 int pfd; 130 int pfd;
131 char *slave;
128 132
129 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); 133 slave = _getpty (&pfd, O_RDWR | O_NOCTTY, 0622, 0);
130 134
131 if (*ttydev != NULL) 135 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 { 136 {
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)); 137 *ttydev = strdup (slave);
163 return pfd; 138 return pfd;
164 } 139 }
165 140
166 return -1; 141 return -1;
167 } 142 }
… …
179 const char *majors = "pqrstuvwxyzabcde"; 154 const char *majors = "pqrstuvwxyzabcde";
180 const char *minors = "0123456789abcdef"; 155 const char *minors = "0123456789abcdef";
181 156
182 for (i = 0; i < 256; i++) 157 for (i = 0; i < 256; i++)
183 { 158 {
184 snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]); 159 snprintf (pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]);
185 snprintf(tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]); 160 snprintf (tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]);
186 161
187 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1) 162 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
188 { 163 {
189 snprintf(pty_name, 32, "/dev/ptyp%d", i); 164 snprintf (pty_name, 32, "/dev/ptyp%d", i);
190 snprintf(tty_name, 32, "/dev/ttyp%d", i); 165 snprintf (tty_name, 32, "/dev/ttyp%d", i);
191 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1) 166 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
192 continue; 167 continue;
193 } 168 }
194 169
195 if (access (tty_name, R_OK | W_OK) == 0) 170 if (access (tty_name, R_OK | W_OK) == 0)
… …
225{ 200{
226 int fd; 201 int fd;
227 202
228 setsid (); 203 setsid ();
229 204
230#if defined(HAVE_DEV_PTMX) && defined(I_PUSH) 205#ifdef TIOCSCTTY
206 ioctl (fd_tty, TIOCSCTTY, NULL);
207#else
208 fd = open (ttyname (fd_tty), O_RDWR);
209 if (fd >= 0)
210 close (fd);
211#endif
212
213 fd = open ("/dev/tty", O_WRONLY);
214 if (fd < 0)
215 return -1; /* fatal */
216
217 close (fd);
218
219 return 0;
220}
221
222void
223ptytty::close_tty ()
224{
225 if (tty < 0)
226 return;
227
228 close (tty);
229 tty = -1;
230}
231
232bool
233ptytty::make_controlling_tty ()
234{
235 return control_tty (tty) >= 0;
236}
237
238void
239ptytty::set_utf8_mode (bool on)
240{
241#ifdef IUTF8
242 if (pty < 0)
243 return;
244
245 struct termios tio;
246
247 if (tcgetattr (pty, &tio) != -1)
248 {
249 tcflag_t new_cflag = tio.c_iflag;
250
251 if (on)
252 new_cflag |= IUTF8;
253 else
254 new_cflag &= ~IUTF8;
255
256 if (new_cflag != tio.c_iflag)
257 {
258 tio.c_iflag = new_cflag;
259 tcsetattr (pty, TCSANOW, &tio);
260 }
261 }
262#endif
263}
264
265static struct ttyconf {
266 gid_t gid;
267 mode_t mode;
268
269 ttyconf ()
270 {
271#ifdef TTY_GID_SUPPORT
272 struct group *gr = getgrnam ("tty");
273
274 if (gr)
275 {
276 /* change group ownership of tty to "tty" */
277 mode = S_IRUSR | S_IWUSR | S_IWGRP;
278 gid = gr->gr_gid;
279 }
280 else
281#endif /* TTY_GID_SUPPORT */
282 {
283 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
284 gid = 0;
285 }
286 }
287} ttyconf;
288
289ptytty_unix::ptytty_unix ()
290{
291 name = 0;
292#if UTMP_SUPPORT
293 cmd_pid = 0;
294#endif
295}
296
297ptytty_unix::~ptytty_unix ()
298{
299#if UTMP_SUPPORT
300 logout ();
301#endif
302 put ();
303}
304
305void
306ptytty_unix::put ()
307{
308 if (name)
309 {
310 chmod (name, RESTORE_TTY_MODE);
311 chown (name, 0, ttyconf.gid);
312 }
313
314 close_tty ();
315
316 if (pty >= 0)
317 close (pty);
318
319 free (name);
320
321 pty = tty = -1;
322 name = 0;
323}
324
325bool
326ptytty_unix::get ()
327{
328 /* get master (pty) */
329 if ((pty = get_pty (&tty, &name)) < 0)
330 return false;
331
332 /* get slave (tty) */
333 if (tty < 0)
334 {
335#ifndef NO_SETOWNER_TTYDEV
336 chown (name, getuid (), ttyconf.gid); /* fail silently */
337 chmod (name, ttyconf.mode);
338# ifdef HAVE_REVOKE
339 revoke (name);
340# endif
341#endif
342
343 if ((tty = get_tty (name)) < 0)
344 {
345 put ();
346 return false;
347 }
348 }
349
350#if defined(I_PUSH)
231 /* 351 /*
232 * Push STREAMS modules: 352 * Push STREAMS modules:
233 * ptem: pseudo-terminal hardware emulation module. 353 * ptem: pseudo-terminal hardware emulation module.
234 * ldterm: standard terminal line discipline. 354 * ldterm: standard terminal line discipline.
235 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 355 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
236 * 356 *
237 * After we push the STREAMS modules, the first open () on the slave side 357 * 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 358 * 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 359 * 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 360 * 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 361 * 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 362 * 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 363 * 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 364 * close () - on the master side which causes a hang up to be sent
246 * through - Geoff Wing 365 * through - Geoff Wing
247 */ 366 */
248# ifdef HAVE_ISASTREAM 367#if defined(HAVE_ISASTREAM) && defined(HAVE_STROPTS_H)
249 if (isastream (fd_tty) == 1) 368 if (isastream (tty) == 1)
250# endif 369# endif
251 { 370 {
252 ioctl (fd_tty, I_PUSH, "ptem"); 371 ioctl (tty, I_PUSH, "ptem");
253 ioctl (fd_tty, I_PUSH, "ldterm"); 372 ioctl (tty, I_PUSH, "ldterm");
254 ioctl (fd_tty, I_PUSH, "ttcompat"); 373 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 { 374 }
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 375#endif
316}
317 376
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 377#if UTMP_SUPPORT
345 cmd_pid = 0; 378# if defined(HAVE_STRUCT_UTMP) && !defined(HAVE_UTMP_PID)
346#endif 379 int fd_stdin = dup (STDIN_FILENO);
347} 380 dup2 (tty, STDIN_FILENO);
348 381
349ptytty_unix::~ptytty_unix () 382 utmp_pos = ttyslot ();
350{
351#if UTMP_SUPPORT
352 logout ();
353#endif
354 put ();
355}
356 383
357void 384 dup2 (fd_stdin, STDIN_FILENO);
358ptytty_unix::put () 385 close (fd_stdin);
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 386# endif
395#endif 387#endif
396 388
397 if ((tty = get_tty (name)) < 0)
398 {
399 put ();
400 return false;
401 }
402 }
403
404 return true; 389 return true;
405} 390}
406 391

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