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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.28 by root, Wed Jan 4 03:02:01 2006 UTC vs.
Revision 1.41 by root, Tue Jan 17 15:41:33 2006 UTC

… …
2 * File: ptytty.C 2 * File: ptytty.C
3 *----------------------------------------------------------------------* 3 *----------------------------------------------------------------------*
4 * 4 *
5 * All portions of code are copyright by their respective author/s. 5 * All portions of code are copyright by their respective author/s.
6 * Copyright (c) 1999-2001 Geoff Wing <gcw@pobox.com> 6 * Copyright (c) 1999-2001 Geoff Wing <gcw@pobox.com>
7 * Copyright (c) 2004 Marc Lehmann <pcg@goof.com> 7 * Copyright (c) 2004-2006 Marc Lehmann <pcg@goof.com>
8 * 8 *
9 * This program is free software; you can redistribute it and/or modify 9 * 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 10 * 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 11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version. 12 * (at your option) any later version.
… …
22 *---------------------------------------------------------------------*/ 22 *---------------------------------------------------------------------*/
23 23
24#include "../config.h" /* NECESSARY */ 24#include "../config.h" /* NECESSARY */
25#include "rxvt.h" 25#include "rxvt.h"
26 26
27#ifdef HAVE_STDLIB_H
28# include <cstdlib> 27#include <cstdlib>
29#endif 28#include <cstring>
30#ifdef HAVE_SYS_TYPES_H 29
31# include <sys/types.h> 30#include <sys/types.h>
32#endif 31#include <sys/socket.h>
33#ifdef HAVE_UNISTD_H
34# include <unistd.h> 32#include <unistd.h>
35#endif
36#if defined(HAVE_STRING_H)
37# include <cstring>
38#endif
39#ifdef HAVE_FCNTL_H
40# include <fcntl.h> 33#include <fcntl.h>
41#endif 34
42#ifdef HAVE_SYS_IOCTL_H 35#ifdef HAVE_SYS_IOCTL_H
43# include <sys/ioctl.h> 36# include <sys/ioctl.h>
44#endif 37#endif
45#if defined(PTYS_ARE_PTMX) && defined(HAVE_SYS_STROPTS_H) 38#if defined(PTYS_ARE_PTMX) && defined(HAVE_SYS_STROPTS_H)
46# include <sys/stropts.h> /* for I_PUSH */ 39# include <sys/stropts.h> /* for I_PUSH */
47#endif 40#endif
48#ifdef HAVE_ISASTREAM 41#ifdef HAVE_ISASTREAM
49# include <stropts.h> 42# include <stropts.h>
50#endif 43#endif
51#ifdef HAVE_PTY_H 44#if defined(HAVE_PTY_H)
52# include <pty.h> 45# include <pty.h>
53#endif 46#elif defined(HAVE_LIBUTIL_H)
54
55// better do this via configure, but....
56#if defined(__FreeBSD__)
57# include <libutil.h> 47# include <libutil.h>
58#elif defined(__DARWIN__) || (defined (__MACH__) && defined (__APPLE__)) 48#elif defined(HAVE_UTIL_H)
59# include <util.h> 49# include <util.h>
60#endif 50#endif
61 51
62#include <cstdio> 52#include <cstdio>
63#include <grp.h> 53#include <grp.h>
54
55#include "rxvtutil.h"
56#include "fdpass.h"
57#include "ptytty.h"
58
59/////////////////////////////////////////////////////////////////////////////
64 60
65/* ------------------------------------------------------------------------- * 61/* ------------------------------------------------------------------------- *
66 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 62 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
67 * ------------------------------------------------------------------------- */ 63 * ------------------------------------------------------------------------- */
68/* 64/*
… …
76 int pfd; 72 int pfd;
77 73
78#ifdef PTYS_ARE_OPENPTY 74#ifdef PTYS_ARE_OPENPTY
79 char tty_name[sizeof "/dev/pts/????\0"]; 75 char tty_name[sizeof "/dev/pts/????\0"];
80 76
81 rxvt_privileges(RESTORE);
82 int res = openpty (&pfd, fd_tty, tty_name, NULL, NULL); 77 int res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
83 rxvt_privileges(IGNORE);
84 78
85 if (res != -1) 79 if (res != -1)
86 { 80 {
87 *ttydev = strdup (tty_name); 81 *ttydev = strdup (tty_name);
88 return pfd; 82 return pfd;
… …
93 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); 87 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
94 if (*ttydev != NULL) 88 if (*ttydev != NULL)
95 return pfd; 89 return pfd;
96#endif 90#endif
97 91
98#ifdef PTYS_ARE_GETPTY
99 char *ptydev;
100
101 while ((ptydev = getpty ()) != NULL)
102 if ((pfd = open (ptydev, O_RDWR | O_NOCTTY, 0)) >= 0)
103 {
104 *ttydev = ptydev;
105 return pfd;
106 }
107#endif
108
109#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT) 92#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
110# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_PTMX) 93# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_POSIX) || defined(PTYS_ARE_PTMX)
111 94
112 { 95 {
113# ifdef PTYS_ARE_GETPT 96# ifdef PTYS_ARE_GETPT
114 pfd = getpt (); 97 pfd = getpt();
98# else
99# ifdef PTYS_ARE_POSIX
100 pfd = posix_openpt (O_RDWR);
115# else 101# else
116 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 102 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
103# endif
117# endif 104# endif
118 105
119 if (pfd >= 0) 106 if (pfd >= 0)
120 { 107 {
121 if (grantpt (pfd) == 0 /* change slave permissions */ 108 if (grantpt (pfd) == 0 /* change slave permissions */
… …
231/*----------------------------------------------------------------------*/ 218/*----------------------------------------------------------------------*/
232/* 219/*
233 * 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
234 */ 221 */
235static int 222static int
236control_tty (int fd_tty, const char *ttydev) 223control_tty (int fd_tty)
237{ 224{
238#ifndef __QNX__
239 int fd; 225 int fd;
240 226
241 /* ---------------------------------------- */ 227 /* ---------------------------------------- */
242# ifdef HAVE_SETSID
243 setsid (); 228 setsid ();
244# endif
245# if defined(HAVE_SETPGID)
246 setpgid (0, 0);
247# elif defined(HAVE_SETPGRP)
248 setpgrp (0, 0);
249# endif
250 229
251 /* ---------------------------------------- */ 230 /* ---------------------------------------- */
252# ifdef TIOCNOTTY
253 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
254 if (fd >= 0)
255 {
256 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
257 close (fd);
258 }
259# endif
260
261 /* ---------------------------------------- */
262 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
263 if (fd >= 0)
264 close (fd); /* ouch: still have controlling tty */
265
266 /* ---------------------------------------- */
267#if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 231# if defined(PTYS_ARE_PTMX) && defined(I_PUSH)
268 /* 232 /*
269 * Push STREAMS modules: 233 * Push STREAMS modules:
270 * ptem: pseudo-terminal hardware emulation module. 234 * ptem: pseudo-terminal hardware emulation module.
271 * ldterm: standard terminal line discipline. 235 * ldterm: standard terminal line discipline.
272 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 236 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
… …
280 * documentation is really unclear about whether it is any close () on 244 * documentation is really unclear about whether it is any close () on
281 * the master side or the last close () - i.e. a proper STREAMS dismantling 245 * the master side or the last close () - i.e. a proper STREAMS dismantling
282 * close () - on the master side which causes a hang up to be sent 246 * close () - on the master side which causes a hang up to be sent
283 * through - Geoff Wing 247 * through - Geoff Wing
284 */ 248 */
285# ifdef HAVE_ISASTREAM 249# ifdef HAVE_ISASTREAM
286 if (isastream (fd_tty) == 1) 250 if (isastream (fd_tty) == 1)
287# endif 251# endif
288 { 252 {
289 ioctl (fd_tty, I_PUSH, "ptem"); 253 ioctl (fd_tty, I_PUSH, "ptem");
290 ioctl (fd_tty, I_PUSH, "ldterm"); 254 ioctl (fd_tty, I_PUSH, "ldterm");
291 ioctl (fd_tty, I_PUSH, "ttcompat"); 255 ioctl (fd_tty, I_PUSH, "ttcompat");
292 } 256 }
293#endif 257# endif
294 /* ---------------------------------------- */ 258 /* ---------------------------------------- */
295# if defined(TIOCSCTTY)
296 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 259 fd = ioctl (fd_tty, TIOCSCTTY, NULL);
297# elif defined(TIOCSETCTTY)
298 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
299# else
300 fd = open (ttydev, O_RDWR);
301 if (fd >= 0)
302 close (fd);
303# endif
304 /* ---------------------------------------- */ 260 /* ---------------------------------------- */
305 fd = open ("/dev/tty", O_WRONLY); 261 fd = open ("/dev/tty", O_WRONLY);
306 if (fd < 0) 262 if (fd < 0)
307 return -1; /* fatal */ 263 return -1; /* fatal */
308 close (fd); 264 close (fd);
309 /* ---------------------------------------- */ 265 /* ---------------------------------------- */
310#endif /* ! __QNX__ */
311 266
312 return 0; 267 return 0;
313} 268}
269
270void
271rxvt_ptytty::close_tty ()
272{
273 if (tty < 0)
274 return;
275
276 close (tty);
277 tty = -1;
278}
279
280bool
281rxvt_ptytty::make_controlling_tty ()
282{
283 return control_tty (tty) >= 0;
284}
285
286void
287rxvt_ptytty::set_utf8_mode (bool on)
288{
289#ifdef IUTF8
290 if (pty < 0)
291 return;
292
293 struct termios tio;
294
295 if (tcgetattr (pty, &tio) != -1)
296 {
297 tcflag_t new_cflag = tio.c_iflag;
298
299 if (on)
300 new_cflag |= IUTF8;
301 else
302 new_cflag &= ~IUTF8;
303
304 if (new_cflag != tio.c_iflag)
305 {
306 tio.c_iflag = new_cflag;
307 tcsetattr (pty, TCSANOW, &tio);
308 }
309 }
310#endif
311}
312
313/////////////////////////////////////////////////////////////////////////////
314 314
315#ifndef NO_SETOWNER_TTYDEV 315#ifndef NO_SETOWNER_TTYDEV
316static struct ttyconf { 316static struct ttyconf {
317 gid_t gid; 317 gid_t gid;
318 mode_t mode; 318 mode_t mode;
… …
334 gid = getgid (); 334 gid = getgid ();
335 } 335 }
336 } 336 }
337} ttyconf; 337} ttyconf;
338 338
339/////////////////////////////////////////////////////////////////////////////
340
339void 341void
340rxvt_ptytty::privileges (rxvt_privaction action) 342rxvt_ptytty_unix::privileges (rxvt_privaction action)
341{ 343{
342 if (!name || !*name) 344 if (!name || !*name)
343 return; 345 return;
344
345 rxvt_privileges (RESTORE);
346 346
347 if (action == SAVE) 347 if (action == SAVE)
348 { 348 {
349# ifndef RESET_TTY_TO_COMMON_DEFAULTS 349# ifndef RESET_TTY_TO_COMMON_DEFAULTS
350 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */ 350 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
… …
373 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH)); 373 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
374 chown (name, 0, 0); 374 chown (name, 0, 0);
375# endif 375# endif
376 376
377 } 377 }
378
379 rxvt_privileges (IGNORE);
380} 378}
381#endif 379#endif
382 380
383rxvt_ptytty::rxvt_ptytty () 381rxvt_ptytty_unix::rxvt_ptytty_unix ()
384{ 382{
385 pty = tty = -1; 383 pty = tty = -1;
386 name = 0; 384 name = 0;
387#ifndef NO_SETOWNER_TTYDEV 385#ifndef NO_SETOWNER_TTYDEV
388 saved = false; 386 saved = false;
389#endif 387#endif
388#if UTMP_SUPPORT
389 cmd_pid = 0;
390#endif
390} 391}
391 392
392rxvt_ptytty::~rxvt_ptytty () 393rxvt_ptytty_unix::~rxvt_ptytty_unix ()
393{ 394{
395 logout ();
394 put (); 396 put ();
395} 397}
396 398
397void 399void
398
399rxvt_ptytty::close_tty ()
400{
401 if (tty >= 0) close (tty);
402 tty = -1;
403}
404
405void
406rxvt_ptytty::put () 400rxvt_ptytty_unix::put ()
407{ 401{
408#ifndef NO_SETOWNER_TTYDEV 402#ifndef NO_SETOWNER_TTYDEV
409 privileges (RESTORE); 403 privileges (RESTORE);
410#endif 404#endif
411 405
… …
416 pty = tty = -1; 410 pty = tty = -1;
417 name = 0; 411 name = 0;
418} 412}
419 413
420bool 414bool
421rxvt_ptytty::make_controlling_tty ()
422{
423 return control_tty (tty, name) >= 0;
424}
425
426bool
427rxvt_ptytty::get () 415rxvt_ptytty_unix::get ()
428{ 416{
429 /* get master (pty) */ 417 /* get master (pty) */
430 if ((pty = get_pty (&tty, &name)) < 0) 418 if ((pty = get_pty (&tty, &name)) < 0)
431 return false; 419 return false;
432 420
… …
447 } 435 }
448 436
449 return true; 437 return true;
450} 438}
451 439
440#if PTYTTY_HELPER
441
442static int sock_fd;
443static int pid;
444
445struct command
446{
447 enum { get, login, destroy } type;
448
449 rxvt_ptytty *id;
450
451 bool login_shell;
452 int cmd_pid;
453 char hostname[512]; // arbitrary, but should be plenty
454};
455
456struct rxvt_ptytty_proxy : zero_initialized, rxvt_ptytty
457{
458 rxvt_ptytty *id;
459
460 ~rxvt_ptytty_proxy ();
461
462 bool get ();
463 void login (int cmd_pid, bool login_shell, const char *hostname);
464};
465
466bool
467rxvt_ptytty_proxy::get ()
468{
469 command cmd;
470
471 cmd.type = command::get;
472
473 write (sock_fd, &cmd, sizeof (cmd));
474
475 if (read (sock_fd, &id, sizeof (id)) != sizeof (id))
476 rxvt_fatal ("protocol error while creating pty using helper process, aborting.\n");
477
478 if (!id)
479 return false;
480
481 if ((pty = rxvt_recv_fd (sock_fd)) < 0
482 || (tty = rxvt_recv_fd (sock_fd)) < 0)
483 rxvt_fatal ("protocol error while reading pty/tty fds from helper process, aborting.\n");
484
485 return true;
486}
487
452void 488void
453rxvt_ptytty::set_utf8_mode (bool on) 489rxvt_ptytty_proxy::login (int cmd_pid, bool login_shell, const char *hostname)
454{ 490{
455#ifdef IUTF8 491 command cmd;
456 if (pty != -1)
457 {
458 struct termios tio;
459 492
460 if (tcgetattr (pty, &tio) != -1) 493 cmd.type = command::login;
494 cmd.id = id;
495 cmd.cmd_pid = cmd_pid;
496 cmd.login_shell = login_shell;
497 strncpy (cmd.hostname, hostname, sizeof (cmd.hostname));
498
499 write (sock_fd, &cmd, sizeof (cmd));
500}
501
502rxvt_ptytty_proxy::~rxvt_ptytty_proxy ()
503{
504 command cmd;
505
506 cmd.type = command::destroy;
507 cmd.id = id;
508
509 write (sock_fd, &cmd, sizeof (cmd));
510}
511
512static
513void serve ()
514{
515 command cmd;
516 vector<rxvt_ptytty *> ptys;
517
518 while (read (sock_fd, &cmd, sizeof (command)) == sizeof (command))
519 {
520 if (cmd.type == command::get)
521 {
522 // -> id ptyfd ttyfd
523 cmd.id = new rxvt_ptytty_unix;
524
525 if (cmd.id->get ())
461 { 526 {
462 tcflag_t new_cflag = tio.c_iflag; 527 write (sock_fd, &cmd.id, sizeof (cmd.id));
528 ptys.push_back (cmd.id);
463 529
464 if (on) 530 rxvt_send_fd (sock_fd, cmd.id->pty);
465 new_cflag |= IUTF8; 531 rxvt_send_fd (sock_fd, cmd.id->tty);
532 }
466 else 533 else
467 new_cflag &= ~IUTF8;
468
469 if (new_cflag != tio.c_iflag)
470 { 534 {
471 tio.c_iflag = new_cflag; 535 delete cmd.id;
472 tcsetattr (pty, TCSANOW, &tio); 536 cmd.id = 0;
537 write (sock_fd, &cmd.id, sizeof (cmd.id));
473 } 538 }
474 } 539 }
540 else if (cmd.type == command::login)
541 {
542 if (find (ptys.begin (), ptys.end (), cmd.id))
543 {
544 cmd.hostname[sizeof (cmd.hostname) - 1] = 0;
545 cmd.id->login (cmd.cmd_pid, cmd.login_shell, cmd.hostname);
546 }
547 }
548 else if (cmd.type == command::destroy)
549 {
550 rxvt_ptytty **pty = find (ptys.begin (), ptys.end (), cmd.id);
551
552 if (*pty)
553 {
554 ptys.erase (pty);
555 delete *pty;
556 }
557 }
558 else
559 break;
560 }
561
562 // destroy all ptys
563 for (rxvt_ptytty **i = ptys.end (); i-- > ptys.begin (); )
564 delete *i;
565}
566
567void rxvt_ptytty_server ()
568{
569 int sv[2];
570
571 if (socketpair (AF_UNIX, SOCK_STREAM, 0, sv))
572 rxvt_fatal ("could not create socket to communicate with pty/sessiondb helper, aborting.\n");
573
574 pid = fork ();
575
576 if (pid < 0)
577 rxvt_fatal ("could not create pty/sessiondb helper process, aborting.\n");
578
579 if (pid)
475 } 580 {
581 // client, urxvt
582 sock_fd = sv[0];
583 close (sv[1]);
584 fcntl (sock_fd, F_SETFD, FD_CLOEXEC);
585 }
586 else
587 {
588 setgid (getegid ());
589 setuid (geteuid ());
590
591 // server, pty-helper
592 sock_fd = sv[1];
593
594 for (int fd = 0; fd < 1023; fd++)
595 if (fd != sock_fd)
596 close (fd);
597
598 serve ();
599 _exit (EXIT_SUCCESS);
600 }
601}
476#endif 602#endif
603
604// a "factory" *g*
605rxvt_ptytty *
606rxvt_new_ptytty ()
607{
608#if PTYTTY_HELPER
609 if (pid > 0)
610 // use helper process
611 return new rxvt_ptytty_proxy;
612 else
613#endif
614 return new rxvt_ptytty_unix;
477} 615}
478 616
479/*----------------------- end-of-file (C source) -----------------------*/ 617/*----------------------- end-of-file (C source) -----------------------*/
480 618

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