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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 1.61 by root, Wed Jan 25 10:51:26 2006 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>
… …
51#ifdef TTY_GID_SUPPORT 56#ifdef TTY_GID_SUPPORT
52#include <grp.h> 57#include <grp.h>
53#endif 58#endif
54 59
55#include <cstdio> 60#include <cstdio>
56
57#include "rxvtutil.h"
58#include "fdpass.h"
59#include "ptytty.h"
60 61
61///////////////////////////////////////////////////////////////////////////// 62/////////////////////////////////////////////////////////////////////////////
62 63
63/* ------------------------------------------------------------------------- * 64/* ------------------------------------------------------------------------- *
64 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 65 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
… …
234 235
235 ioctl (fd_tty, TIOCSCTTY, NULL); 236 ioctl (fd_tty, TIOCSCTTY, NULL);
236 237
237 int fd = open ("/dev/tty", O_WRONLY); 238 int fd = open ("/dev/tty", O_WRONLY);
238 if (fd < 0) 239 if (fd < 0)
239 return -1; /* fatal */ 240 return -1; /* fatal */
240 241
241 close (fd); 242 close (fd);
242 243
243 return 0; 244 return 0;
244} 245}
245 246
246void 247void
247rxvt_ptytty::close_tty () 248ptytty::close_tty ()
248{ 249{
249 if (tty < 0) 250 if (tty < 0)
250 return; 251 return;
251 252
252 close (tty); 253 close (tty);
253 tty = -1; 254 tty = -1;
254} 255}
255 256
256bool 257bool
257rxvt_ptytty::make_controlling_tty () 258ptytty::make_controlling_tty ()
258{ 259{
259 return control_tty (tty) >= 0; 260 return control_tty (tty) >= 0;
260} 261}
261 262
262void 263void
263rxvt_ptytty::set_utf8_mode (bool on) 264ptytty::set_utf8_mode (bool on)
264{ 265{
265#ifdef IUTF8 266#ifdef IUTF8
266 if (pty < 0) 267 if (pty < 0)
267 return; 268 return;
268 269
… …
307 gid = 0; 308 gid = 0;
308 } 309 }
309 } 310 }
310} ttyconf; 311} ttyconf;
311 312
312rxvt_ptytty_unix::rxvt_ptytty_unix () 313ptytty_unix::ptytty_unix ()
313{ 314{
314 name = 0; 315 name = 0;
315#if UTMP_SUPPORT 316#if UTMP_SUPPORT
316 cmd_pid = 0; 317 cmd_pid = 0;
317#endif 318#endif
318} 319}
319 320
320rxvt_ptytty_unix::~rxvt_ptytty_unix () 321ptytty_unix::~ptytty_unix ()
321{ 322{
322#if UTMP_SUPPORT 323#if UTMP_SUPPORT
323 logout (); 324 logout ();
324#endif 325#endif
325 put (); 326 put ();
326} 327}
327 328
328void 329void
329rxvt_ptytty_unix::put () 330ptytty_unix::put ()
330{ 331{
331 chmod (name, RESTORE_TTY_MODE); 332 chmod (name, RESTORE_TTY_MODE);
332 chown (name, 0, ttyconf.gid); 333 chown (name, 0, ttyconf.gid);
333 334
334 close_tty (); 335 close_tty ();
… …
341 pty = tty = -1; 342 pty = tty = -1;
342 name = 0; 343 name = 0;
343} 344}
344 345
345bool 346bool
346rxvt_ptytty_unix::get () 347ptytty_unix::get ()
347{ 348{
348 /* get master (pty) */ 349 /* get master (pty) */
349 if ((pty = get_pty (&tty, &name)) < 0) 350 if ((pty = get_pty (&tty, &name)) < 0)
350 return false; 351 return false;
351 352
… …
370 } 371 }
371 372
372 return true; 373 return true;
373} 374}
374 375
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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