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Comparing libptytty/src/ptytty.C (file contents):
Revision 1.2 by root, Sat Jan 21 22:01:36 2006 UTC vs.
Revision 1.29 by ayin, Thu Jun 28 17:41:01 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
30#include "ptytty.h"
25 31
26#include <cstdlib> 32#include <cstdlib>
27#include <cstring> 33#include <cstring>
34#include <csignal>
28 35
29#include <sys/types.h> 36#include <sys/types.h>
30#include <sys/socket.h>
31#include <unistd.h> 37#include <unistd.h>
32#include <fcntl.h> 38#include <fcntl.h>
33 39
34#ifdef HAVE_SYS_IOCTL_H 40#ifdef HAVE_SYS_IOCTL_H
35# include <sys/ioctl.h> 41# include <sys/ioctl.h>
… …
51#include <grp.h> 57#include <grp.h>
52#endif 58#endif
53 59
54#include <cstdio> 60#include <cstdio>
55 61
56#include "rxvtutil.h"
57#include "fdpass.h"
58#include "ptytty.h"
59
60///////////////////////////////////////////////////////////////////////////// 62/////////////////////////////////////////////////////////////////////////////
61 63
62/* ------------------------------------------------------------------------- * 64/* ------------------------------------------------------------------------- *
63 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 65 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
64 * ------------------------------------------------------------------------- */ 66 * ------------------------------------------------------------------------- */
65/* 67/*
66 * Returns pty file descriptor, or -1 on failure 68 * Returns pty file descriptor, or -1 on failure
67 * 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.
68 * 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
69 */ 71 */
70#if defined(UNIX98_PTY) 72#if defined(UNIX98_PTY)
73
71static int 74 static int
72get_pty (int *fd_tty, char **ttydev) 75 get_pty (int *fd_tty, char **ttydev)
73{ 76 {
74 int pfd; 77 int pfd;
75 78
76# if defined(HAVE_GETPT) 79# if defined(HAVE_GETPT)
77 pfd = getpt(); 80 pfd = getpt();
78# elif defined(HAVE_POSIX_OPENPT) 81# elif defined(HAVE_POSIX_OPENPT)
79 pfd = posix_openpt (O_RDWR); 82 pfd = posix_openpt (O_RDWR);
80# else 83# else
81 pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0); 84 pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0);
82# endif 85# endif
86
83 if (pfd >= 0) 87 if (pfd >= 0)
84 { 88 {
85 if (grantpt (pfd) == 0 /* change slave permissions */ 89 if (grantpt (pfd) == 0 /* change slave permissions */
86 && unlockpt (pfd) == 0) 90 && unlockpt (pfd) == 0)
87 { /* slave now unlocked */ 91 { /* slave now unlocked */
88 *ttydev = strdup (ptsname (pfd)); /* get slave's name */ 92 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
89 return pfd; 93 return pfd;
90 } 94 }
91 95
92 close (pfd); 96 close (pfd);
93 } 97 }
94 98
95 return -1; 99 return -1;
96} 100 }
101
97#elif defined(HAVE_OPENPTY) 102#elif defined(HAVE_OPENPTY)
103
98static int 104 static int
99get_pty (int *fd_tty, char **ttydev) 105 get_pty (int *fd_tty, char **ttydev)
100{ 106 {
101 int pfd; 107 int pfd;
102 int res; 108 int res;
103 char tty_name[32]; 109
104
105 res = openpty (&pfd, fd_tty, tty_name, NULL, NULL); 110 res = openpty (&pfd, fd_tty, NULL, NULL, NULL);
111
106 if (res != -1) 112 if (res != -1)
107 { 113 {
108 *ttydev = strdup (tty_name); 114 *ttydev = strdup (ttyname (*fd_tty));
115 return pfd;
116 }
117
118 return -1;
119 }
120
121#elif defined(HAVE__GETPTY)
122
123 static int
124 get_pty (int *fd_tty, char **ttydev)
125 {
126 int pfd;
127
128 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
129
130 if (*ttydev != NULL)
109 return pfd; 131 return pfd;
110 }
111 132
112 return -1; 133 return -1;
113} 134 }
114#elif defined(HAVE__GETPTY)
115static int
116get_pty (int *fd_tty, char **ttydev)
117{
118 int pfd;
119 135
120 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
121 if (*ttydev != NULL)
122 return pfd;
123
124 return -1;
125}
126#elif defined(HAVE_DEV_PTC) 136#elif defined(HAVE_DEV_PTC)
137
127static int 138 static int
128get_pty (int *fd_tty, char **ttydev) 139 get_pty (int *fd_tty, char **ttydev)
129{ 140 {
130 int pfd; 141 int pfd;
131 142
132 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) 143 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
133 { 144 {
134 *ttydev = strdup (ttyname (pfd)); 145 *ttydev = strdup (ttyname (pfd));
135 return pfd; 146 return pfd;
136 } 147 }
137 148
138 return -1; 149 return -1;
139} 150 }
151
140#elif defined(HAVE_DEV_CLONE) 152#elif defined(HAVE_DEV_CLONE)
153
141static int 154 static int
142get_pty (int *fd_tty, char **ttydev) 155 get_pty (int *fd_tty, char **ttydev)
143{ 156 {
144 int pfd; 157 int pfd;
145 158
146 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 159 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
147 { 160 {
148 *ttydev = strdup (ptsname (pfd)); 161 *ttydev = strdup (ptsname (pfd));
149 return pfd; 162 return pfd;
150 } 163 }
151 164
152 return -1; 165 return -1;
153} 166 }
167
154#else 168#else
169
155/* Based on the code in openssh/openbsd-compat/bsd-openpty.c */ 170 /* Based on the code in openssh/openbsd-compat/bsd-openpty.c */
156static int 171 static int
157get_pty (int *fd_tty, char **ttydev) 172 get_pty (int *fd_tty, char **ttydev)
158{ 173 {
159 int pfd; 174 int pfd;
160 int i; 175 int i;
161 char pty_name[32]; 176 char pty_name[32];
162 char tty_name[32]; 177 char tty_name[32];
163 const char *majors = "pqrstuvwxyzabcde"; 178 const char *majors = "pqrstuvwxyzabcde";
164 const char *minors = "0123456789abcdef"; 179 const char *minors = "0123456789abcdef";
180
165 for (i = 0; i < 256; i++) 181 for (i = 0; i < 256; i++)
166 { 182 {
167 snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]); 183 snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]);
168 snprintf(tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]); 184 snprintf(tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]);
185
169 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1) 186 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
170 { 187 {
171 snprintf(pty_name, 32, "/dev/ptyp%d", i); 188 snprintf(pty_name, 32, "/dev/ptyp%d", i);
172 snprintf(tty_name, 32, "/dev/ttyp%d", i); 189 snprintf(tty_name, 32, "/dev/ttyp%d", i);
173 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1) 190 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
174 continue; 191 continue;
175 } 192 }
193
176 if (access (tty_name, R_OK | W_OK) == 0) 194 if (access (tty_name, R_OK | W_OK) == 0)
177 { 195 {
178 *ttydev = strdup (tty_name); 196 *ttydev = strdup (tty_name);
179 return pfd; 197 return pfd;
180 } 198 }
181 199
182 close (pfd); 200 close (pfd);
183 } 201 }
184} 202
203 return -1;
204 }
205
185#endif 206#endif
186 207
187/*----------------------------------------------------------------------*/ 208/*----------------------------------------------------------------------*/
188/* 209/*
189 * Returns tty file descriptor, or -1 on failure 210 * Returns tty file descriptor, or -1 on failure
190 */ 211 */
191static int 212static int
192get_tty (char *ttydev) 213get_tty (char *ttydev)
193{ 214{
194 return open (ttydev, O_RDWR | O_NOCTTY, 0); 215 return open (ttydev, O_RDWR | O_NOCTTY, 0);
… …
199 * Make our tty a controlling tty so that /dev/tty points to us 220 * Make our tty a controlling tty so that /dev/tty points to us
200 */ 221 */
201static int 222static int
202control_tty (int fd_tty) 223control_tty (int fd_tty)
203{ 224{
225 int fd;
226
204 setsid (); 227 setsid ();
205 228
206#if defined(HAVE_DEV_PTMX) && defined(I_PUSH) 229#if defined(HAVE_DEV_PTMX) && defined(I_PUSH)
207 /* 230 /*
208 * Push STREAMS modules: 231 * Push STREAMS modules:
… …
229 ioctl (fd_tty, I_PUSH, "ldterm"); 252 ioctl (fd_tty, I_PUSH, "ldterm");
230 ioctl (fd_tty, I_PUSH, "ttcompat"); 253 ioctl (fd_tty, I_PUSH, "ttcompat");
231 } 254 }
232#endif 255#endif
233 256
257#ifdef TIOCSCTTY
234 ioctl (fd_tty, TIOCSCTTY, NULL); 258 ioctl (fd_tty, TIOCSCTTY, NULL);
259#else
260 fd = open (ttyname (fd_tty), O_RDWR);
261 if (fd >= 0)
262 close (fd);
263#endif
235 264
236 int fd = open ("/dev/tty", O_WRONLY); 265 fd = open ("/dev/tty", O_WRONLY);
237 if (fd < 0) 266 if (fd < 0)
238 return -1; /* fatal */ 267 return -1; /* fatal */
239 268
240 close (fd); 269 close (fd);
241 270
242 return 0; 271 return 0;
243} 272}
244 273
245void 274void
246rxvt_ptytty::close_tty () 275ptytty::close_tty ()
247{ 276{
248 if (tty < 0) 277 if (tty < 0)
249 return; 278 return;
250 279
251 close (tty); 280 close (tty);
252 tty = -1; 281 tty = -1;
253} 282}
254 283
255bool 284bool
256rxvt_ptytty::make_controlling_tty () 285ptytty::make_controlling_tty ()
257{ 286{
258 return control_tty (tty) >= 0; 287 return control_tty (tty) >= 0;
259} 288}
260 289
261void 290void
262rxvt_ptytty::set_utf8_mode (bool on) 291ptytty::set_utf8_mode (bool on)
263{ 292{
264#ifdef IUTF8 293#ifdef IUTF8
265 if (pty < 0) 294 if (pty < 0)
266 return; 295 return;
267 296
… …
306 gid = 0; 335 gid = 0;
307 } 336 }
308 } 337 }
309} ttyconf; 338} ttyconf;
310 339
311rxvt_ptytty_unix::rxvt_ptytty_unix () 340ptytty_unix::ptytty_unix ()
312{ 341{
313 name = 0; 342 name = 0;
314#if UTMP_SUPPORT 343#if UTMP_SUPPORT
315 cmd_pid = 0; 344 cmd_pid = 0;
316#endif 345#endif
317} 346}
318 347
319rxvt_ptytty_unix::~rxvt_ptytty_unix () 348ptytty_unix::~ptytty_unix ()
320{ 349{
321#if UTMP_SUPPORT 350#if UTMP_SUPPORT
322 logout (); 351 logout ();
323#endif 352#endif
324 put (); 353 put ();
325} 354}
326 355
327void 356void
328rxvt_ptytty_unix::put () 357ptytty_unix::put ()
329{ 358{
359 if (name)
360 {
330 chmod (name, RESTORE_TTY_MODE); 361 chmod (name, RESTORE_TTY_MODE);
331 chown (name, 0, ttyconf.gid); 362 chown (name, 0, ttyconf.gid);
363 }
332 364
333 close_tty (); 365 close_tty ();
334 366
335 if (pty >= 0) 367 if (pty >= 0)
336 close (pty); 368 close (pty);
… …
340 pty = tty = -1; 372 pty = tty = -1;
341 name = 0; 373 name = 0;
342} 374}
343 375
344bool 376bool
345rxvt_ptytty_unix::get () 377ptytty_unix::get ()
346{ 378{
347 /* get master (pty) */ 379 /* get master (pty) */
348 if ((pty = get_pty (&tty, &name)) < 0) 380 if ((pty = get_pty (&tty, &name)) < 0)
349 return false; 381 return false;
350 382
… …
369 } 401 }
370 402
371 return true; 403 return true;
372} 404}
373 405
374#if PTYTTY_HELPER
375
376static int sock_fd;
377static int pid;
378
379struct command
380{
381 enum { get, login, destroy } type;
382
383 rxvt_ptytty *id;
384
385 bool login_shell;
386 int cmd_pid;
387 char hostname[512]; // arbitrary, but should be plenty
388};
389
390struct rxvt_ptytty_proxy : zero_initialized, rxvt_ptytty
391{
392 rxvt_ptytty *id;
393
394 ~rxvt_ptytty_proxy ();
395
396 bool get ();
397 void login (int cmd_pid, bool login_shell, const char *hostname);
398};
399
400bool
401rxvt_ptytty_proxy::get ()
402{
403 command cmd;
404
405 cmd.type = command::get;
406
407 write (sock_fd, &cmd, sizeof (cmd));
408
409 if (read (sock_fd, &id, sizeof (id)) != sizeof (id))
410 rxvt_fatal ("protocol error while creating pty using helper process, aborting.\n");
411
412 if (!id)
413 return false;
414
415 if ((pty = rxvt_recv_fd (sock_fd)) < 0
416 || (tty = rxvt_recv_fd (sock_fd)) < 0)
417 rxvt_fatal ("protocol error while reading pty/tty fds from helper process, aborting.\n");
418
419 return true;
420}
421
422void
423rxvt_ptytty_proxy::login (int cmd_pid, bool login_shell, const char *hostname)
424{
425 command cmd;
426
427 cmd.type = command::login;
428 cmd.id = id;
429 cmd.cmd_pid = cmd_pid;
430 cmd.login_shell = login_shell;
431 strncpy (cmd.hostname, hostname, sizeof (cmd.hostname));
432
433 write (sock_fd, &cmd, sizeof (cmd));
434}
435
436rxvt_ptytty_proxy::~rxvt_ptytty_proxy ()
437{
438 command cmd;
439
440 cmd.type = command::destroy;
441 cmd.id = id;
442
443 write (sock_fd, &cmd, sizeof (cmd));
444}
445
446static
447void serve ()
448{
449 command cmd;
450 vector<rxvt_ptytty *> ptys;
451
452 while (read (sock_fd, &cmd, sizeof (command)) == sizeof (command))
453 {
454 if (cmd.type == command::get)
455 {
456 // -> id ptyfd ttyfd
457 cmd.id = new rxvt_ptytty_unix;
458
459 if (cmd.id->get ())
460 {
461 write (sock_fd, &cmd.id, sizeof (cmd.id));
462 ptys.push_back (cmd.id);
463
464 rxvt_send_fd (sock_fd, cmd.id->pty);
465 rxvt_send_fd (sock_fd, cmd.id->tty);
466 }
467 else
468 {
469 delete cmd.id;
470 cmd.id = 0;
471 write (sock_fd, &cmd.id, sizeof (cmd.id));
472 }
473 }
474 else if (cmd.type == command::login)
475 {
476#if UTMP_SUPPORT
477 if (find (ptys.begin (), ptys.end (), cmd.id))
478 {
479 cmd.hostname[sizeof (cmd.hostname) - 1] = 0;
480 cmd.id->login (cmd.cmd_pid, cmd.login_shell, cmd.hostname);
481 }
482#endif
483 }
484 else if (cmd.type == command::destroy)
485 {
486 rxvt_ptytty **pty = find (ptys.begin (), ptys.end (), cmd.id);
487
488 if (pty)
489 {
490 delete *pty;
491 ptys.erase (pty);
492 }
493 }
494 else
495 break;
496 }
497
498 // destroy all ptys
499 for (rxvt_ptytty **i = ptys.end (); i-- > ptys.begin (); )
500 delete *i;
501}
502
503void rxvt_ptytty_server ()
504{
505 int sv[2];
506
507 if (socketpair (AF_UNIX, SOCK_STREAM, 0, sv))
508 rxvt_fatal ("could not create socket to communicate with pty/sessiondb helper, aborting.\n");
509
510 pid = fork ();
511
512 if (pid < 0)
513 rxvt_fatal ("could not create pty/sessiondb helper process, aborting.\n");
514
515 if (pid)
516 {
517 // client, urxvt
518 sock_fd = sv[0];
519 close (sv[1]);
520 fcntl (sock_fd, F_SETFD, FD_CLOEXEC);
521 }
522 else
523 {
524 // server, pty-helper
525 sock_fd = sv[1];
526
527 for (int fd = 0; fd < 1023; fd++)
528 if (fd != sock_fd)
529 close (fd);
530
531 serve ();
532 _exit (EXIT_SUCCESS);
533 }
534}
535
536#endif
537
538// a "factory" *g*
539rxvt_ptytty *
540rxvt_new_ptytty ()
541{
542#if PTYTTY_HELPER
543 if (pid > 0)
544 // use helper process
545 return new rxvt_ptytty_proxy;
546 else
547#endif
548 return new rxvt_ptytty_unix;
549}
550
551/*----------------------- end-of-file (C source) -----------------------*/
552

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