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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.53 by ayin, Sat Jan 21 18:15:26 2006 UTC vs.
Revision 1.68 by ayin, Tue Dec 11 21:49:12 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) 2004-2006 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#include <cstdlib> 32#include <cstdlib>
28#include <cstring> 33#include <cstring>
34#include <csignal>
29 35
30#include <sys/types.h> 36#include <sys/types.h>
31#include <sys/socket.h>
32#include <unistd.h> 37#include <unistd.h>
33#include <fcntl.h> 38#include <fcntl.h>
34 39
35#ifdef HAVE_SYS_IOCTL_H 40#ifdef HAVE_SYS_IOCTL_H
36# include <sys/ioctl.h> 41# include <sys/ioctl.h>
… …
52#include <grp.h> 57#include <grp.h>
53#endif 58#endif
54 59
55#include <cstdio> 60#include <cstdio>
56 61
57#include "rxvtutil.h"
58#include "fdpass.h"
59#include "ptytty.h"
60
61///////////////////////////////////////////////////////////////////////////// 62/////////////////////////////////////////////////////////////////////////////
62 63
63/* ------------------------------------------------------------------------- * 64/* ------------------------------------------------------------------------- *
64 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 65 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
65 * ------------------------------------------------------------------------- */ 66 * ------------------------------------------------------------------------- */
66/* 67/*
67 * Returns pty file descriptor, or -1 on failure 68 * Returns pty file descriptor, or -1 on failure
68 * 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.
69 * 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
70 */ 71 */
71#if defined(UNIX98_PTY) 72#if defined(UNIX98_PTY)
73
72static int 74 static int
73get_pty (int *fd_tty, char **ttydev) 75 get_pty (int *fd_tty, char **ttydev)
74{ 76 {
75 int pfd; 77 int pfd;
76 78
77# if defined(HAVE_GETPT) 79# if defined(HAVE_GETPT)
78 pfd = getpt(); 80 pfd = getpt();
79# elif defined(HAVE_POSIX_OPENPT) 81# elif defined(HAVE_POSIX_OPENPT)
80 pfd = posix_openpt (O_RDWR); 82 pfd = posix_openpt (O_RDWR);
81# else 83# else
82 pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0); 84 pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0);
83# endif 85# endif
86
84 if (pfd >= 0) 87 if (pfd >= 0)
85 { 88 {
86 if (grantpt (pfd) == 0 /* change slave permissions */ 89 if (grantpt (pfd) == 0 /* change slave permissions */
87 && unlockpt (pfd) == 0) 90 && unlockpt (pfd) == 0)
91 {
88 { /* slave now unlocked */ 92 /* slave now unlocked */
89 *ttydev = strdup (ptsname (pfd)); /* get slave's name */ 93 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
90 return pfd; 94 return pfd;
91 } 95 }
92 96
93 close (pfd); 97 close (pfd);
94 } 98 }
95 99
96 return -1; 100 return -1;
97} 101 }
102
98#elif defined(HAVE_OPENPTY) 103#elif defined(HAVE_OPENPTY)
104
99static int 105 static int
100get_pty (int *fd_tty, char **ttydev) 106 get_pty (int *fd_tty, char **ttydev)
101{ 107 {
102 int pfd; 108 int pfd;
103 int res; 109 int res;
104 char tty_name[32]; 110
105
106 res = openpty (&pfd, fd_tty, tty_name, NULL, NULL); 111 res = openpty (&pfd, fd_tty, NULL, NULL, NULL);
112
107 if (res != -1) 113 if (res != -1)
108 { 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) {
109 *ttydev = strdup (tty_name); 133 *ttydev = strdup (slave);
110 return pfd; 134 return pfd;
111 } 135 }
112 136
113 return -1; 137 return -1;
114} 138 }
115#elif defined(HAVE__GETPTY)
116static int
117get_pty (int *fd_tty, char **ttydev)
118{
119 int pfd;
120 139
121 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
122 if (*ttydev != NULL)
123 return pfd;
124
125 return -1;
126}
127#elif defined(HAVE_DEV_PTC) 140#elif defined(HAVE_DEV_PTC)
141
128static int 142 static int
129get_pty (int *fd_tty, char **ttydev) 143 get_pty (int *fd_tty, char **ttydev)
130{ 144 {
131 int pfd; 145 int pfd;
132 146
133 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) 147 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
134 { 148 {
135 *ttydev = strdup (ttyname (pfd)); 149 *ttydev = strdup (ttyname (pfd));
136 return pfd; 150 return pfd;
137 } 151 }
138 152
139 return -1; 153 return -1;
140} 154 }
155
141#elif defined(HAVE_DEV_CLONE) 156#elif defined(HAVE_DEV_CLONE)
157
142static int 158 static int
143get_pty (int *fd_tty, char **ttydev) 159 get_pty (int *fd_tty, char **ttydev)
144{ 160 {
145 int pfd; 161 int pfd;
146 162
147 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 163 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
148 { 164 {
149 *ttydev = strdup (ptsname (pfd)); 165 *ttydev = strdup (ptsname (pfd));
150 return pfd; 166 return pfd;
151 } 167 }
152 168
153 return -1; 169 return -1;
154} 170 }
171
155#else 172#else
173
156/* Based on the code in openssh/openbsd-compat/bsd-openpty.c */ 174 /* Based on the code in openssh/openbsd-compat/bsd-openpty.c */
157static int 175 static int
158get_pty (int *fd_tty, char **ttydev) 176 get_pty (int *fd_tty, char **ttydev)
159{ 177 {
160 int pfd; 178 int pfd;
161 int i; 179 int i;
162 char pty_name[32]; 180 char pty_name[32];
163 char tty_name[32]; 181 char tty_name[32];
164 const char *majors = "pqrstuvwxyzabcde"; 182 const char *majors = "pqrstuvwxyzabcde";
165 const char *minors = "0123456789abcdef"; 183 const char *minors = "0123456789abcdef";
184
166 for (i = 0; i < 256; i++) 185 for (i = 0; i < 256; i++)
167 { 186 {
168 snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]); 187 snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]);
169 snprintf(tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]); 188 snprintf(tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]);
189
170 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1) 190 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
171 { 191 {
172 snprintf(pty_name, 32, "/dev/ptyp%d", i); 192 snprintf(pty_name, 32, "/dev/ptyp%d", i);
173 snprintf(tty_name, 32, "/dev/ttyp%d", i); 193 snprintf(tty_name, 32, "/dev/ttyp%d", i);
174 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1) 194 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
175 continue; 195 continue;
176 } 196 }
197
177 if (access (tty_name, R_OK | W_OK) == 0) 198 if (access (tty_name, R_OK | W_OK) == 0)
178 { 199 {
179 *ttydev = strdup (tty_name); 200 *ttydev = strdup (tty_name);
180 return pfd; 201 return pfd;
181 } 202 }
182 203
183 close (pfd); 204 close (pfd);
184 } 205 }
185} 206
207 return -1;
208 }
209
186#endif 210#endif
187 211
188/*----------------------------------------------------------------------*/ 212/*----------------------------------------------------------------------*/
189/* 213/*
190 * Returns tty file descriptor, or -1 on failure 214 * Returns tty file descriptor, or -1 on failure
191 */ 215 */
192static int 216static int
193get_tty (char *ttydev) 217get_tty (char *ttydev)
194{ 218{
195 return open (ttydev, O_RDWR | O_NOCTTY, 0); 219 return open (ttydev, O_RDWR | O_NOCTTY, 0);
… …
200 * Make our tty a controlling tty so that /dev/tty points to us 224 * Make our tty a controlling tty so that /dev/tty points to us
201 */ 225 */
202static int 226static int
203control_tty (int fd_tty) 227control_tty (int fd_tty)
204{ 228{
229 int fd;
230
205 setsid (); 231 setsid ();
206 232
207#if defined(HAVE_DEV_PTMX) && defined(I_PUSH) 233#if defined(HAVE_DEV_PTMX) && defined(I_PUSH)
208 /* 234 /*
209 * Push STREAMS modules: 235 * Push STREAMS modules:
… …
230 ioctl (fd_tty, I_PUSH, "ldterm"); 256 ioctl (fd_tty, I_PUSH, "ldterm");
231 ioctl (fd_tty, I_PUSH, "ttcompat"); 257 ioctl (fd_tty, I_PUSH, "ttcompat");
232 } 258 }
233#endif 259#endif
234 260
261#ifdef TIOCSCTTY
235 ioctl (fd_tty, TIOCSCTTY, NULL); 262 ioctl (fd_tty, TIOCSCTTY, NULL);
263#else
264 fd = open (ttyname (fd_tty), O_RDWR);
265 if (fd >= 0)
266 close (fd);
267#endif
236 268
237 int fd = open ("/dev/tty", O_WRONLY); 269 fd = open ("/dev/tty", O_WRONLY);
238 if (fd < 0) 270 if (fd < 0)
239 return -1; /* fatal */ 271 return -1; /* fatal */
240 272
241 close (fd); 273 close (fd);
242 274
243 return 0; 275 return 0;
244} 276}
245 277
246void 278void
247rxvt_ptytty::close_tty () 279ptytty::close_tty ()
248{ 280{
249 if (tty < 0) 281 if (tty < 0)
250 return; 282 return;
251 283
252 close (tty); 284 close (tty);
253 tty = -1; 285 tty = -1;
254} 286}
255 287
256bool 288bool
257rxvt_ptytty::make_controlling_tty () 289ptytty::make_controlling_tty ()
258{ 290{
259 return control_tty (tty) >= 0; 291 return control_tty (tty) >= 0;
260} 292}
261 293
262void 294void
263rxvt_ptytty::set_utf8_mode (bool on) 295ptytty::set_utf8_mode (bool on)
264{ 296{
265#ifdef IUTF8 297#ifdef IUTF8
266 if (pty < 0) 298 if (pty < 0)
267 return; 299 return;
268 300
… …
294 { 326 {
295#ifdef TTY_GID_SUPPORT 327#ifdef TTY_GID_SUPPORT
296 struct group *gr = getgrnam ("tty"); 328 struct group *gr = getgrnam ("tty");
297 329
298 if (gr) 330 if (gr)
331 {
299 { /* change group ownership of tty to "tty" */ 332 /* change group ownership of tty to "tty" */
300 mode = S_IRUSR | S_IWUSR | S_IWGRP; 333 mode = S_IRUSR | S_IWUSR | S_IWGRP;
301 gid = gr->gr_gid; 334 gid = gr->gr_gid;
302 } 335 }
303 else 336 else
304#endif /* TTY_GID_SUPPORT */ 337#endif /* TTY_GID_SUPPORT */
305 { 338 {
306 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; 339 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
307 gid = 0; 340 gid = 0;
308 } 341 }
309 } 342 }
310} ttyconf; 343} ttyconf;
311 344
312rxvt_ptytty_unix::rxvt_ptytty_unix () 345ptytty_unix::ptytty_unix ()
313{ 346{
314 name = 0; 347 name = 0;
315#if UTMP_SUPPORT 348#if UTMP_SUPPORT
316 cmd_pid = 0; 349 cmd_pid = 0;
317#endif 350#endif
318} 351}
319 352
320rxvt_ptytty_unix::~rxvt_ptytty_unix () 353ptytty_unix::~ptytty_unix ()
321{ 354{
322#if UTMP_SUPPORT 355#if UTMP_SUPPORT
323 logout (); 356 logout ();
324#endif 357#endif
325 put (); 358 put ();
326} 359}
327 360
328void 361void
329rxvt_ptytty_unix::put () 362ptytty_unix::put ()
330{ 363{
364 if (name)
365 {
331 chmod (name, RESTORE_TTY_MODE); 366 chmod (name, RESTORE_TTY_MODE);
332 chown (name, 0, ttyconf.gid); 367 chown (name, 0, ttyconf.gid);
368 }
333 369
334 close_tty (); 370 close_tty ();
335 371
336 if (pty >= 0) 372 if (pty >= 0)
337 close (pty); 373 close (pty);
… …
341 pty = tty = -1; 377 pty = tty = -1;
342 name = 0; 378 name = 0;
343} 379}
344 380
345bool 381bool
346rxvt_ptytty_unix::get () 382ptytty_unix::get ()
347{ 383{
348 /* get master (pty) */ 384 /* get master (pty) */
349 if ((pty = get_pty (&tty, &name)) < 0) 385 if ((pty = get_pty (&tty, &name)) < 0)
350 return false; 386 return false;
351 387
… …
370 } 406 }
371 407
372 return true; 408 return true;
373} 409}
374 410
375#if PTYTTY_HELPER
376
377static int sock_fd;
378static int pid;
379
380struct command
381{
382 enum { get, login, destroy } type;
383
384 rxvt_ptytty *id;
385
386 bool login_shell;
387 int cmd_pid;
388 char hostname[512]; // arbitrary, but should be plenty
389};
390
391struct rxvt_ptytty_proxy : zero_initialized, rxvt_ptytty
392{
393 rxvt_ptytty *id;
394
395 ~rxvt_ptytty_proxy ();
396
397 bool get ();
398 void login (int cmd_pid, bool login_shell, const char *hostname);
399};
400
401bool
402rxvt_ptytty_proxy::get ()
403{
404 command cmd;
405
406 cmd.type = command::get;
407
408 write (sock_fd, &cmd, sizeof (cmd));
409
410 if (read (sock_fd, &id, sizeof (id)) != sizeof (id))
411 rxvt_fatal ("protocol error while creating pty using helper process, aborting.\n");
412
413 if (!id)
414 return false;
415
416 if ((pty = rxvt_recv_fd (sock_fd)) < 0
417 || (tty = rxvt_recv_fd (sock_fd)) < 0)
418 rxvt_fatal ("protocol error while reading pty/tty fds from helper process, aborting.\n");
419
420 return true;
421}
422
423void
424rxvt_ptytty_proxy::login (int cmd_pid, bool login_shell, const char *hostname)
425{
426 command cmd;
427
428 cmd.type = command::login;
429 cmd.id = id;
430 cmd.cmd_pid = cmd_pid;
431 cmd.login_shell = login_shell;
432 strncpy (cmd.hostname, hostname, sizeof (cmd.hostname));
433
434 write (sock_fd, &cmd, sizeof (cmd));
435}
436
437rxvt_ptytty_proxy::~rxvt_ptytty_proxy ()
438{
439 command cmd;
440
441 cmd.type = command::destroy;
442 cmd.id = id;
443
444 write (sock_fd, &cmd, sizeof (cmd));
445}
446
447static
448void serve ()
449{
450 command cmd;
451 vector<rxvt_ptytty *> ptys;
452
453 while (read (sock_fd, &cmd, sizeof (command)) == sizeof (command))
454 {
455 if (cmd.type == command::get)
456 {
457 // -> id ptyfd ttyfd
458 cmd.id = new rxvt_ptytty_unix;
459
460 if (cmd.id->get ())
461 {
462 write (sock_fd, &cmd.id, sizeof (cmd.id));
463 ptys.push_back (cmd.id);
464
465 rxvt_send_fd (sock_fd, cmd.id->pty);
466 rxvt_send_fd (sock_fd, cmd.id->tty);
467 }
468 else
469 {
470 delete cmd.id;
471 cmd.id = 0;
472 write (sock_fd, &cmd.id, sizeof (cmd.id));
473 }
474 }
475 else if (cmd.type == command::login)
476 {
477#if UTMP_SUPPORT
478 if (find (ptys.begin (), ptys.end (), cmd.id))
479 {
480 cmd.hostname[sizeof (cmd.hostname) - 1] = 0;
481 cmd.id->login (cmd.cmd_pid, cmd.login_shell, cmd.hostname);
482 }
483#endif
484 }
485 else if (cmd.type == command::destroy)
486 {
487 rxvt_ptytty **pty = find (ptys.begin (), ptys.end (), cmd.id);
488
489 if (pty)
490 {
491 delete *pty;
492 ptys.erase (pty);
493 }
494 }
495 else
496 break;
497 }
498
499 // destroy all ptys
500 for (rxvt_ptytty **i = ptys.end (); i-- > ptys.begin (); )
501 delete *i;
502}
503
504void rxvt_ptytty_server ()
505{
506 int sv[2];
507
508 if (socketpair (AF_UNIX, SOCK_STREAM, 0, sv))
509 rxvt_fatal ("could not create socket to communicate with pty/sessiondb helper, aborting.\n");
510
511 pid = fork ();
512
513 if (pid < 0)
514 rxvt_fatal ("could not create pty/sessiondb helper process, aborting.\n");
515
516 if (pid)
517 {
518 // client, urxvt
519 sock_fd = sv[0];
520 close (sv[1]);
521 fcntl (sock_fd, F_SETFD, FD_CLOEXEC);
522 }
523 else
524 {
525 // server, pty-helper
526 sock_fd = sv[1];
527
528 for (int fd = 0; fd < 1023; fd++)
529 if (fd != sock_fd)
530 close (fd);
531
532 serve ();
533 _exit (EXIT_SUCCESS);
534 }
535}
536
537#endif
538
539// a "factory" *g*
540rxvt_ptytty *
541rxvt_new_ptytty ()
542{
543#if PTYTTY_HELPER
544 if (pid > 0)
545 // use helper process
546 return new rxvt_ptytty_proxy;
547 else
548#endif
549 return new rxvt_ptytty_unix;
550}
551
552/*----------------------- end-of-file (C source) -----------------------*/
553

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