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Comparing libptytty/src/ptytty.C (file contents):
Revision 1.31 by ayin, Thu Nov 15 10:49:05 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);
… …
124 get_pty (int *fd_tty, char **ttydev) 128 get_pty (int *fd_tty, char **ttydev)
125 { 129 {
126 int pfd; 130 int pfd;
127 char *slave; 131 char *slave;
128 132
129 slave = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); 133 slave = _getpty (&pfd, O_RDWR | O_NOCTTY, 0622, 0);
130 134
131 if (slave != NULL) { 135 if (slave != NULL)
132 *ttydev = strdup (slave);
133 return pfd;
134 }
135
136 return -1;
137 }
138
139#elif defined(HAVE_DEV_PTC)
140
141 static int
142 get_pty (int *fd_tty, char **ttydev)
143 {
144 int pfd;
145
146 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
147 { 136 {
148 *ttydev = strdup (ttyname (pfd));
149 return pfd;
150 }
151
152 return -1;
153 }
154
155#elif defined(HAVE_DEV_CLONE)
156
157 static int
158 get_pty (int *fd_tty, char **ttydev)
159 {
160 int pfd;
161
162 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
163 {
164 *ttydev = strdup (ptsname (pfd)); 137 *ttydev = strdup (slave);
165 return pfd; 138 return pfd;
166 } 139 }
167 140
168 return -1; 141 return -1;
169 } 142 }
… …
181 const char *majors = "pqrstuvwxyzabcde"; 154 const char *majors = "pqrstuvwxyzabcde";
182 const char *minors = "0123456789abcdef"; 155 const char *minors = "0123456789abcdef";
183 156
184 for (i = 0; i < 256; i++) 157 for (i = 0; i < 256; i++)
185 { 158 {
186 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]);
187 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]);
188 161
189 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1) 162 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
190 { 163 {
191 snprintf(pty_name, 32, "/dev/ptyp%d", i); 164 snprintf (pty_name, 32, "/dev/ptyp%d", i);
192 snprintf(tty_name, 32, "/dev/ttyp%d", i); 165 snprintf (tty_name, 32, "/dev/ttyp%d", i);
193 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1) 166 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
194 continue; 167 continue;
195 } 168 }
196 169
197 if (access (tty_name, R_OK | W_OK) == 0) 170 if (access (tty_name, R_OK | W_OK) == 0)
… …
227{ 200{
228 int fd; 201 int fd;
229 202
230 setsid (); 203 setsid ();
231 204
232#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)
233 /* 351 /*
234 * Push STREAMS modules: 352 * Push STREAMS modules:
235 * ptem: pseudo-terminal hardware emulation module. 353 * ptem: pseudo-terminal hardware emulation module.
236 * ldterm: standard terminal line discipline. 354 * ldterm: standard terminal line discipline.
237 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 355 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
238 * 356 *
239 * 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
240 * (i.e. the next section between the dashes giving us "tty opened OK")
241 * should make the "ptem" (or "ldterm" depending upon either which OS 358 * should make the "ptem" (or "ldterm" depending upon either which OS
242 * 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
243 * controlling terminal. We must already have close ()d the master side 360 * controlling terminal. We must already have close ()d the master side
244 * 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
245 * documentation is really unclear about whether it is any close () on 362 * documentation is really unclear about whether it is any close () on
246 * 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
247 * 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
248 * through - Geoff Wing 365 * through - Geoff Wing
249 */ 366 */
250# ifdef HAVE_ISASTREAM 367#if defined(HAVE_ISASTREAM) && defined(HAVE_STROPTS_H)
251 if (isastream (fd_tty) == 1) 368 if (isastream (tty) == 1)
252# endif 369# endif
253 { 370 {
254 ioctl (fd_tty, I_PUSH, "ptem"); 371 ioctl (tty, I_PUSH, "ptem");
255 ioctl (fd_tty, I_PUSH, "ldterm"); 372 ioctl (tty, I_PUSH, "ldterm");
256 ioctl (fd_tty, I_PUSH, "ttcompat"); 373 ioctl (tty, I_PUSH, "ttcompat");
257 }
258#endif
259
260#ifdef TIOCSCTTY
261 ioctl (fd_tty, TIOCSCTTY, NULL);
262#else
263 fd = open (ttyname (fd_tty), O_RDWR);
264 if (fd >= 0)
265 close (fd);
266#endif
267
268 fd = open ("/dev/tty", O_WRONLY);
269 if (fd < 0)
270 return -1; /* fatal */
271
272 close (fd);
273
274 return 0;
275}
276
277void
278ptytty::close_tty ()
279{
280 if (tty < 0)
281 return;
282
283 close (tty);
284 tty = -1;
285}
286
287bool
288ptytty::make_controlling_tty ()
289{
290 return control_tty (tty) >= 0;
291}
292
293void
294ptytty::set_utf8_mode (bool on)
295{
296#ifdef IUTF8
297 if (pty < 0)
298 return;
299
300 struct termios tio;
301
302 if (tcgetattr (pty, &tio) != -1)
303 { 374 }
304 tcflag_t new_cflag = tio.c_iflag;
305
306 if (on)
307 new_cflag |= IUTF8;
308 else
309 new_cflag &= ~IUTF8;
310
311 if (new_cflag != tio.c_iflag)
312 {
313 tio.c_iflag = new_cflag;
314 tcsetattr (pty, TCSANOW, &tio);
315 }
316 }
317#endif 375#endif
318}
319 376
320static struct ttyconf {
321 gid_t gid;
322 mode_t mode;
323
324 ttyconf ()
325 {
326#ifdef TTY_GID_SUPPORT
327 struct group *gr = getgrnam ("tty");
328
329 if (gr)
330 { /* change group ownership of tty to "tty" */
331 mode = S_IRUSR | S_IWUSR | S_IWGRP;
332 gid = gr->gr_gid;
333 }
334 else
335#endif /* TTY_GID_SUPPORT */
336 {
337 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
338 gid = 0;
339 }
340 }
341} ttyconf;
342
343ptytty_unix::ptytty_unix ()
344{
345 name = 0;
346#if UTMP_SUPPORT 377#if UTMP_SUPPORT
347 cmd_pid = 0; 378# if defined(HAVE_STRUCT_UTMP) && !defined(HAVE_UTMP_PID)
348#endif 379 int fd_stdin = dup (STDIN_FILENO);
349} 380 dup2 (tty, STDIN_FILENO);
350 381
351ptytty_unix::~ptytty_unix () 382 utmp_pos = ttyslot ();
352{
353#if UTMP_SUPPORT
354 logout ();
355#endif
356 put ();
357}
358 383
359void 384 dup2 (fd_stdin, STDIN_FILENO);
360ptytty_unix::put () 385 close (fd_stdin);
361{
362 if (name)
363 {
364 chmod (name, RESTORE_TTY_MODE);
365 chown (name, 0, ttyconf.gid);
366 }
367
368 close_tty ();
369
370 if (pty >= 0)
371 close (pty);
372
373 free (name);
374
375 pty = tty = -1;
376 name = 0;
377}
378
379bool
380ptytty_unix::get ()
381{
382 /* get master (pty) */
383 if ((pty = get_pty (&tty, &name)) < 0)
384 return false;
385
386 fcntl (pty, F_SETFL, O_NONBLOCK);
387
388 /* get slave (tty) */
389 if (tty < 0)
390 {
391#ifndef NO_SETOWNER_TTYDEV
392 chown (name, getuid (), ttyconf.gid); /* fail silently */
393 chmod (name, ttyconf.mode);
394# ifdef HAVE_REVOKE
395 revoke (name);
396# endif 386# endif
397#endif 387#endif
398 388
399 if ((tty = get_tty (name)) < 0)
400 {
401 put ();
402 return false;
403 }
404 }
405
406 return true; 389 return true;
407} 390}
408 391

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