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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 1.47 by sf-exg, Wed Dec 21 11:07:22 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)
… …
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
60#include <cstdio> 61#ifndef O_NOCTTY
62# define O_NOCTTY 0
63#endif
61 64
62///////////////////////////////////////////////////////////////////////////// 65/////////////////////////////////////////////////////////////////////////////
63 66
64/* ------------------------------------------------------------------------- * 67/* ------------------------------------------------------------------------- *
65 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 68 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
… …
75 get_pty (int *fd_tty, char **ttydev) 78 get_pty (int *fd_tty, char **ttydev)
76 { 79 {
77 int pfd; 80 int pfd;
78 81
79# if defined(HAVE_GETPT) 82# if defined(HAVE_GETPT)
80 pfd = getpt(); 83 pfd = getpt ();
81# elif defined(HAVE_POSIX_OPENPT) 84# elif defined(HAVE_POSIX_OPENPT)
82 pfd = posix_openpt (O_RDWR); 85 pfd = posix_openpt (O_RDWR | O_NOCTTY);
83# else 86# else
87# ifdef _AIX
84 pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0); 88 pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0);
89# else
90 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
91# endif
85# endif 92# endif
86 93
87 if (pfd >= 0) 94 if (pfd >= 0)
88 { 95 {
89 if (grantpt (pfd) == 0 /* change slave permissions */ 96 if (grantpt (pfd) == 0 /* change slave permissions */
90 && unlockpt (pfd) == 0) 97 && unlockpt (pfd) == 0)
98 {
91 { /* slave now unlocked */ 99 /* slave now unlocked */
92 *ttydev = strdup (ptsname (pfd)); /* get slave's name */ 100 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
93 return pfd; 101 return pfd;
94 } 102 }
95 103
96 close (pfd); 104 close (pfd);
… …
124 get_pty (int *fd_tty, char **ttydev) 132 get_pty (int *fd_tty, char **ttydev)
125 { 133 {
126 int pfd; 134 int pfd;
127 char *slave; 135 char *slave;
128 136
129 slave = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); 137 slave = _getpty (&pfd, O_RDWR | O_NOCTTY, 0622, 0);
130 138
131 if (slave != NULL) { 139 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 { 140 {
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)); 141 *ttydev = strdup (slave);
165 return pfd; 142 return pfd;
166 } 143 }
167 144
168 return -1; 145 return -1;
169 } 146 }
… …
181 const char *majors = "pqrstuvwxyzabcde"; 158 const char *majors = "pqrstuvwxyzabcde";
182 const char *minors = "0123456789abcdef"; 159 const char *minors = "0123456789abcdef";
183 160
184 for (i = 0; i < 256; i++) 161 for (i = 0; i < 256; i++)
185 { 162 {
186 snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]); 163 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]); 164 snprintf (tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]);
188 165
189 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1) 166 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
190 { 167 {
191 snprintf(pty_name, 32, "/dev/ptyp%d", i); 168 snprintf (pty_name, 32, "/dev/ptyp%d", i);
192 snprintf(tty_name, 32, "/dev/ttyp%d", i); 169 snprintf (tty_name, 32, "/dev/ttyp%d", i);
193 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1) 170 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
194 continue; 171 continue;
195 } 172 }
196 173
197 if (access (tty_name, R_OK | W_OK) == 0) 174 if (access (tty_name, R_OK | W_OK) == 0)
… …
227{ 204{
228 int fd; 205 int fd;
229 206
230 setsid (); 207 setsid ();
231 208
232#if defined(HAVE_DEV_PTMX) && defined(I_PUSH) 209#ifdef TIOCSCTTY
210 ioctl (fd_tty, TIOCSCTTY, NULL);
211#else
212 fd = open (ttyname (fd_tty), O_RDWR);
213 if (fd >= 0)
214 close (fd);
215#endif
216
217 fd = open ("/dev/tty", O_WRONLY);
218 if (fd < 0)
219 return -1; /* fatal */
220
221 close (fd);
222
223 return 0;
224}
225
226void
227ptytty::close_tty ()
228{
229 if (tty < 0)
230 return;
231
232 close (tty);
233 tty = -1;
234}
235
236bool
237ptytty::make_controlling_tty ()
238{
239 return control_tty (tty) >= 0;
240}
241
242void
243ptytty::set_utf8_mode (bool on)
244{
245#ifdef IUTF8
246 if (pty < 0)
247 return;
248
249 struct termios tio;
250
251 if (tcgetattr (pty, &tio) != -1)
252 {
253 tcflag_t new_cflag = tio.c_iflag;
254
255 if (on)
256 new_cflag |= IUTF8;
257 else
258 new_cflag &= ~IUTF8;
259
260 if (new_cflag != tio.c_iflag)
261 {
262 tio.c_iflag = new_cflag;
263 tcsetattr (pty, TCSANOW, &tio);
264 }
265 }
266#endif
267}
268
269static struct ttyconf {
270 gid_t gid;
271 mode_t mode;
272
273 ttyconf ()
274 {
275#ifdef TTY_GID_SUPPORT
276 struct group *gr = getgrnam ("tty");
277
278 if (gr)
279 {
280 /* change group ownership of tty to "tty" */
281 mode = S_IRUSR | S_IWUSR | S_IWGRP;
282 gid = gr->gr_gid;
283 }
284 else
285#endif /* TTY_GID_SUPPORT */
286 {
287 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
288 gid = 0;
289 }
290 }
291} ttyconf;
292
293ptytty_unix::ptytty_unix ()
294{
295 name = 0;
296#if UTMP_SUPPORT
297 cmd_pid = 0;
298#endif
299}
300
301ptytty_unix::~ptytty_unix ()
302{
303#if UTMP_SUPPORT
304 logout ();
305#endif
306 put ();
307}
308
309void
310ptytty_unix::put ()
311{
312 if (name)
313 {
314 chmod (name, RESTORE_TTY_MODE);
315 chown (name, 0, ttyconf.gid);
316 }
317
318 close_tty ();
319
320 if (pty >= 0)
321 close (pty);
322
323 free (name);
324
325 pty = tty = -1;
326 name = 0;
327}
328
329bool
330ptytty_unix::get ()
331{
332 /* get master (pty) */
333 if ((pty = get_pty (&tty, &name)) < 0)
334 return false;
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)
233 /* 355 /*
234 * Push STREAMS modules: 356 * Push STREAMS modules:
235 * ptem: pseudo-terminal hardware emulation module. 357 * ptem: pseudo-terminal hardware emulation module.
236 * ldterm: standard terminal line discipline. 358 * ldterm: standard terminal line discipline.
237 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 359 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
238 * 360 *
239 * 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
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 362 * 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 363 * 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 364 * 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 365 * 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 366 * 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 367 * 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 368 * close () - on the master side which causes a hang up to be sent
248 * through - Geoff Wing 369 * through - Geoff Wing
249 */ 370 */
250# ifdef HAVE_ISASTREAM 371#if defined(HAVE_ISASTREAM) && defined(HAVE_STROPTS_H)
251 if (isastream (fd_tty) == 1) 372 if (isastream (tty) == 1)
252# endif 373# endif
253 { 374 {
254 ioctl (fd_tty, I_PUSH, "ptem"); 375 ioctl (tty, I_PUSH, "ptem");
255 ioctl (fd_tty, I_PUSH, "ldterm"); 376 ioctl (tty, I_PUSH, "ldterm");
256 ioctl (fd_tty, I_PUSH, "ttcompat"); 377 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 { 378 }
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 379#endif
318}
319 380
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 381#if UTMP_SUPPORT
347 cmd_pid = 0; 382# if defined(HAVE_STRUCT_UTMP) && !defined(HAVE_UTMP_PID)
348#endif 383 int fd_stdin = dup (STDIN_FILENO);
349} 384 dup2 (tty, STDIN_FILENO);
350 385
351ptytty_unix::~ptytty_unix () 386 utmp_pos = ttyslot ();
352{
353#if UTMP_SUPPORT
354 logout ();
355#endif
356 put ();
357}
358 387
359void 388 dup2 (fd_stdin, STDIN_FILENO);
360ptytty_unix::put () 389 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 390# endif
397#endif 391#endif
398 392
399 if ((tty = get_tty (name)) < 0)
400 {
401 put ();
402 return false;
403 }
404 }
405
406 return true; 393 return true;
407} 394}
408 395

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