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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.54 by root, Sun Jan 22 00:48:13 2006 UTC vs.
Revision 1.62 by ayin, Mon Sep 11 08:48:37 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"
25 29
26#include "fdpass.h"
27#include "ptytty.h" 30#include "ptytty.h"
28 31
29#include <cstdlib> 32#include <cstdlib>
30#include <cstring> 33#include <cstring>
34#include <csignal>
31 35
32#include <sys/types.h> 36#include <sys/types.h>
33#include <sys/socket.h>
34#include <unistd.h> 37#include <unistd.h>
35#include <fcntl.h> 38#include <fcntl.h>
36 39
37#ifdef HAVE_SYS_IOCTL_H 40#ifdef HAVE_SYS_IOCTL_H
38# include <sys/ioctl.h> 41# include <sys/ioctl.h>
… …
178 return pfd; 181 return pfd;
179 } 182 }
180 183
181 close (pfd); 184 close (pfd);
182 } 185 }
186
187 return -1;
183} 188}
184#endif 189#endif
185 190
186/*----------------------------------------------------------------------*/ 191/*----------------------------------------------------------------------*/
187/* 192/*
… …
232 237
233 ioctl (fd_tty, TIOCSCTTY, NULL); 238 ioctl (fd_tty, TIOCSCTTY, NULL);
234 239
235 int fd = open ("/dev/tty", O_WRONLY); 240 int fd = open ("/dev/tty", O_WRONLY);
236 if (fd < 0) 241 if (fd < 0)
237 return -1; /* fatal */ 242 return -1; /* fatal */
238 243
239 close (fd); 244 close (fd);
240 245
241 return 0; 246 return 0;
242} 247}
… …
368 } 373 }
369 374
370 return true; 375 return true;
371} 376}
372 377
373#if PTYTTY_HELPER
374
375static int sock_fd;
376static int pid;
377
378struct command
379{
380 enum { get, login, destroy } type;
381
382 ptytty *id;
383
384 bool login_shell;
385 int cmd_pid;
386 char hostname[512]; // arbitrary, but should be plenty
387};
388
389struct ptytty_proxy : ptytty
390{
391 ptytty *id;
392
393 ptytty_proxy ()
394 : id(0)
395 {
396 }
397
398 ~ptytty_proxy ();
399
400 bool get ();
401 void login (int cmd_pid, bool login_shell, const char *hostname);
402};
403
404bool
405ptytty_proxy::get ()
406{
407 command cmd;
408
409 cmd.type = command::get;
410
411 write (sock_fd, &cmd, sizeof (cmd));
412
413 if (read (sock_fd, &id, sizeof (id)) != sizeof (id))
414 fatal ("protocol error while creating pty using helper process, aborting.\n");
415
416 if (!id)
417 return false;
418
419 if ((pty = ptytty_recv_fd (sock_fd)) < 0
420 || (tty = ptytty_recv_fd (sock_fd)) < 0)
421 fatal ("protocol error while reading pty/tty fds from helper process, aborting.\n");
422
423 return true;
424}
425
426void
427ptytty_proxy::login (int cmd_pid, bool login_shell, const char *hostname)
428{
429 command cmd;
430
431 cmd.type = command::login;
432 cmd.id = id;
433 cmd.cmd_pid = cmd_pid;
434 cmd.login_shell = login_shell;
435 strncpy (cmd.hostname, hostname, sizeof (cmd.hostname));
436
437 write (sock_fd, &cmd, sizeof (cmd));
438}
439
440ptytty_proxy::~ptytty_proxy ()
441{
442 if (id)
443 {
444 command cmd;
445
446 cmd.type = command::destroy;
447 cmd.id = id;
448
449 write (sock_fd, &cmd, sizeof (cmd));
450 }
451}
452
453static
454void serve ()
455{
456 command cmd;
457 vector<ptytty *> ptys;
458
459 while (read (sock_fd, &cmd, sizeof (command)) == sizeof (command))
460 {
461 if (cmd.type == command::get)
462 {
463 // -> id ptyfd ttyfd
464 cmd.id = new ptytty_unix;
465
466 if (cmd.id->get ())
467 {
468 write (sock_fd, &cmd.id, sizeof (cmd.id));
469 ptys.push_back (cmd.id);
470
471 ptytty_send_fd (sock_fd, cmd.id->pty);
472 ptytty_send_fd (sock_fd, cmd.id->tty);
473 }
474 else
475 {
476 delete cmd.id;
477 cmd.id = 0;
478 write (sock_fd, &cmd.id, sizeof (cmd.id));
479 }
480 }
481 else if (cmd.type == command::login)
482 {
483#if UTMP_SUPPORT
484 if (find (ptys.begin (), ptys.end (), cmd.id))
485 {
486 cmd.hostname[sizeof (cmd.hostname) - 1] = 0;
487 cmd.id->login (cmd.cmd_pid, cmd.login_shell, cmd.hostname);
488 }
489#endif
490 }
491 else if (cmd.type == command::destroy)
492 {
493 ptytty **pty = find (ptys.begin (), ptys.end (), cmd.id);
494
495 if (pty)
496 {
497 delete *pty;
498 ptys.erase (pty);
499 }
500 }
501 else
502 break;
503 }
504
505 // destroy all ptys
506 for (ptytty **i = ptys.end (); i-- > ptys.begin (); )
507 delete *i;
508}
509
510void ptytty_server ()
511{
512 int sv[2];
513
514 if (socketpair (AF_UNIX, SOCK_STREAM, 0, sv))
515 fatal ("could not create socket to communicate with pty/sessiondb helper, aborting.\n");
516
517 pid = fork ();
518
519 if (pid < 0)
520 fatal ("could not create pty/sessiondb helper process, aborting.\n");
521
522 if (pid)
523 {
524 // client, process
525 sock_fd = sv[0];
526 close (sv[1]);
527 fcntl (sock_fd, F_SETFD, FD_CLOEXEC);
528 }
529 else
530 {
531 // server, pty-helper
532 sock_fd = sv[1];
533
534 for (int fd = 0; fd < 1023; fd++)
535 if (fd != sock_fd)
536 close (fd);
537
538 serve ();
539 _exit (EXIT_SUCCESS);
540 }
541}
542
543#endif
544
545// a "factory" *g*
546ptytty *
547new_ptytty ()
548{
549#if PTYTTY_HELPER
550 if (pid > 0)
551 // use helper process
552 return new ptytty_proxy;
553 else
554#endif
555 return new ptytty_unix;
556}
557
558/*----------------------- end-of-file (C source) -----------------------*/
559

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