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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.32 by root, Wed Jan 11 20:46:46 2006 UTC vs.
Revision 1.42 by root, Tue Jan 17 16:06:48 2006 UTC

… …
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# include <cstdlib> 27#include <cstdlib>
28# include <cstring> 28#include <cstring>
29 29
30#ifdef HAVE_SYS_TYPES_H
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#ifdef HAVE_FCNTL_H
37# include <fcntl.h> 33#include <fcntl.h>
38#endif 34
39#ifdef HAVE_SYS_IOCTL_H 35#ifdef HAVE_SYS_IOCTL_H
40# include <sys/ioctl.h> 36# include <sys/ioctl.h>
41#endif 37#endif
42#if defined(PTYS_ARE_PTMX) && defined(HAVE_SYS_STROPTS_H) 38#if defined(PTYS_ARE_PTMX) && defined(HAVE_SYS_STROPTS_H)
43# include <sys/stropts.h> /* for I_PUSH */ 39# include <sys/stropts.h> /* for I_PUSH */
… …
53# include <util.h> 49# include <util.h>
54#endif 50#endif
55 51
56#include <cstdio> 52#include <cstdio>
57#include <grp.h> 53#include <grp.h>
54
55#include "rxvtutil.h"
56#include "fdpass.h"
57#include "ptytty.h"
58
59/////////////////////////////////////////////////////////////////////////////
58 60
59/* ------------------------------------------------------------------------- * 61/* ------------------------------------------------------------------------- *
60 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 62 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
61 * ------------------------------------------------------------------------- */ 63 * ------------------------------------------------------------------------- */
62/* 64/*
… …
70 int pfd; 72 int pfd;
71 73
72#ifdef PTYS_ARE_OPENPTY 74#ifdef PTYS_ARE_OPENPTY
73 char tty_name[sizeof "/dev/pts/????\0"]; 75 char tty_name[sizeof "/dev/pts/????\0"];
74 76
75 rxvt_privileges(RESTORE);
76 int res = openpty (&pfd, fd_tty, tty_name, NULL, NULL); 77 int res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
77 rxvt_privileges(IGNORE);
78 78
79 if (res != -1) 79 if (res != -1)
80 { 80 {
81 *ttydev = strdup (tty_name); 81 *ttydev = strdup (tty_name);
82 return pfd; 82 return pfd;
… …
88 if (*ttydev != NULL) 88 if (*ttydev != NULL)
89 return pfd; 89 return pfd;
90#endif 90#endif
91 91
92#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT) 92#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
93# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_PTMX) 93# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_POSIX) || defined(PTYS_ARE_PTMX)
94 94
95 { 95 {
96# ifdef PTYS_ARE_GETPT 96# ifdef PTYS_ARE_GETPT
97 pfd = getpt (); 97 pfd = getpt();
98# else
99# ifdef PTYS_ARE_POSIX
100 pfd = posix_openpt (O_RDWR);
98# else 101# else
99 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 102 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
103# endif
100# endif 104# endif
101 105
102 if (pfd >= 0) 106 if (pfd >= 0)
103 { 107 {
104 if (grantpt (pfd) == 0 /* change slave permissions */ 108 if (grantpt (pfd) == 0 /* change slave permissions */
… …
214/*----------------------------------------------------------------------*/ 218/*----------------------------------------------------------------------*/
215/* 219/*
216 * 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
217 */ 221 */
218static int 222static int
219control_tty (int fd_tty, const char *ttydev) 223control_tty (int fd_tty)
220{ 224{
221#ifndef __QNX__
222 int fd; 225 int fd;
223 226
224 /* ---------------------------------------- */ 227 /* ---------------------------------------- */
225# ifdef HAVE_SETSID
226 setsid (); 228 setsid ();
227# endif
228# if defined(HAVE_SETPGID)
229 setpgid (0, 0);
230# elif defined(HAVE_SETPGRP)
231 setpgrp (0, 0);
232# endif
233 229
234 /* ---------------------------------------- */ 230 /* ---------------------------------------- */
235# ifdef TIOCNOTTY
236 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
237 if (fd >= 0)
238 {
239 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
240 close (fd);
241 }
242# endif
243
244 /* ---------------------------------------- */
245 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
246 if (fd >= 0)
247 close (fd); /* ouch: still have controlling tty */
248
249 /* ---------------------------------------- */
250#if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 231# if defined(PTYS_ARE_PTMX) && defined(I_PUSH)
251 /* 232 /*
252 * Push STREAMS modules: 233 * Push STREAMS modules:
253 * ptem: pseudo-terminal hardware emulation module. 234 * ptem: pseudo-terminal hardware emulation module.
254 * ldterm: standard terminal line discipline. 235 * ldterm: standard terminal line discipline.
255 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 236 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
… …
263 * documentation is really unclear about whether it is any close () on 244 * documentation is really unclear about whether it is any close () on
264 * 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
265 * 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
266 * through - Geoff Wing 247 * through - Geoff Wing
267 */ 248 */
268# ifdef HAVE_ISASTREAM 249# ifdef HAVE_ISASTREAM
269 if (isastream (fd_tty) == 1) 250 if (isastream (fd_tty) == 1)
270# endif 251# endif
271 { 252 {
272 ioctl (fd_tty, I_PUSH, "ptem"); 253 ioctl (fd_tty, I_PUSH, "ptem");
273 ioctl (fd_tty, I_PUSH, "ldterm"); 254 ioctl (fd_tty, I_PUSH, "ldterm");
274 ioctl (fd_tty, I_PUSH, "ttcompat"); 255 ioctl (fd_tty, I_PUSH, "ttcompat");
275 } 256 }
276#endif 257# endif
277 /* ---------------------------------------- */ 258 /* ---------------------------------------- */
278# if defined(TIOCSCTTY)
279 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 259 fd = ioctl (fd_tty, TIOCSCTTY, NULL);
280# elif defined(TIOCSETCTTY)
281 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
282# else
283 fd = open (ttydev, O_RDWR);
284 if (fd >= 0)
285 close (fd);
286# endif
287 /* ---------------------------------------- */ 260 /* ---------------------------------------- */
288 fd = open ("/dev/tty", O_WRONLY); 261 fd = open ("/dev/tty", O_WRONLY);
289 if (fd < 0) 262 if (fd < 0)
290 return -1; /* fatal */ 263 return -1; /* fatal */
291 close (fd); 264 close (fd);
292 /* ---------------------------------------- */ 265 /* ---------------------------------------- */
293#endif /* ! __QNX__ */
294 266
295 return 0; 267 return 0;
296} 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/////////////////////////////////////////////////////////////////////////////
297 314
298#ifndef NO_SETOWNER_TTYDEV 315#ifndef NO_SETOWNER_TTYDEV
299static struct ttyconf { 316static struct ttyconf {
300 gid_t gid; 317 gid_t gid;
301 mode_t mode; 318 mode_t mode;
… …
317 gid = getgid (); 334 gid = getgid ();
318 } 335 }
319 } 336 }
320} ttyconf; 337} ttyconf;
321 338
339/////////////////////////////////////////////////////////////////////////////
340
322void 341void
323rxvt_ptytty::privileges (rxvt_privaction action) 342rxvt_ptytty_unix::privileges (rxvt_privaction action)
324{ 343{
325 if (!name || !*name) 344 if (!name || !*name)
326 return; 345 return;
327
328 rxvt_privileges (RESTORE);
329 346
330 if (action == SAVE) 347 if (action == SAVE)
331 { 348 {
332# ifndef RESET_TTY_TO_COMMON_DEFAULTS 349# ifndef RESET_TTY_TO_COMMON_DEFAULTS
333 /* 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 */
… …
356 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));
357 chown (name, 0, 0); 374 chown (name, 0, 0);
358# endif 375# endif
359 376
360 } 377 }
361
362 rxvt_privileges (IGNORE);
363} 378}
364#endif 379#endif
365 380
366rxvt_ptytty::rxvt_ptytty () 381rxvt_ptytty_unix::rxvt_ptytty_unix ()
367{ 382{
368 pty = tty = -1; 383 pty = tty = -1;
369 name = 0; 384 name = 0;
370#ifndef NO_SETOWNER_TTYDEV 385#ifndef NO_SETOWNER_TTYDEV
371 saved = false; 386 saved = false;
372#endif 387#endif
388#if UTMP_SUPPORT
389 cmd_pid = 0;
390#endif
373} 391}
374 392
375rxvt_ptytty::~rxvt_ptytty () 393rxvt_ptytty_unix::~rxvt_ptytty_unix ()
376{ 394{
395 logout ();
377 put (); 396 put ();
378} 397}
379 398
380void 399void
381
382rxvt_ptytty::close_tty ()
383{
384 if (tty < 0)
385 return;
386
387 close (tty);
388 tty = -1;
389}
390
391void
392rxvt_ptytty::put () 400rxvt_ptytty_unix::put ()
393{ 401{
394#ifndef NO_SETOWNER_TTYDEV 402#ifndef NO_SETOWNER_TTYDEV
395 privileges (RESTORE); 403 privileges (RESTORE);
396#endif 404#endif
397 405
… …
402 pty = tty = -1; 410 pty = tty = -1;
403 name = 0; 411 name = 0;
404} 412}
405 413
406bool 414bool
407rxvt_ptytty::make_controlling_tty ()
408{
409 return control_tty (tty, name) >= 0;
410}
411
412bool
413rxvt_ptytty::get () 415rxvt_ptytty_unix::get ()
414{ 416{
415 /* get master (pty) */ 417 /* get master (pty) */
416 if ((pty = get_pty (&tty, &name)) < 0) 418 if ((pty = get_pty (&tty, &name)) < 0)
417 return false; 419 return false;
418 420
… …
433 } 435 }
434 436
435 return true; 437 return true;
436} 438}
437 439
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
438void 488void
439rxvt_ptytty::set_utf8_mode (bool on) 489rxvt_ptytty_proxy::login (int cmd_pid, bool login_shell, const char *hostname)
440{ 490{
441#ifdef IUTF8 491 command cmd;
442 if (pty < 0)
443 return;
444 492
445 struct termios tio; 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));
446 498
447 if (tcgetattr (pty, &tio) != -1) 499 write (sock_fd, &cmd, sizeof (cmd));
448 { 500}
449 tcflag_t new_cflag = tio.c_iflag;
450 501
451 if (on) 502rxvt_ptytty_proxy::~rxvt_ptytty_proxy ()
452 new_cflag |= IUTF8; 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 ())
526 {
527 write (sock_fd, &cmd.id, sizeof (cmd.id));
528 ptys.push_back (cmd.id);
529
530 rxvt_send_fd (sock_fd, cmd.id->pty);
531 rxvt_send_fd (sock_fd, cmd.id->tty);
532 }
533 else
534 {
535 delete cmd.id;
536 cmd.id = 0;
537 write (sock_fd, &cmd.id, sizeof (cmd.id));
538 }
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 delete *pty;
555 ptys.erase (pty);
556 }
557 }
453 else 558 else
454 new_cflag &= ~IUTF8; 559 break;
560 }
455 561
456 if (new_cflag != tio.c_iflag) 562 // destroy all ptys
457 { 563 for (rxvt_ptytty **i = ptys.end (); i-- > ptys.begin (); )
458 tio.c_iflag = new_cflag; 564 delete *i;
459 tcsetattr (pty, TCSANOW, &tio); 565}
460 } 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)
461 } 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 && fd != 1)
596 close (fd);
597
598 serve ();
599 _exit (EXIT_SUCCESS);
600 }
601}
462#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;
463} 615}
464 616
465/*----------------------- end-of-file (C source) -----------------------*/ 617/*----------------------- end-of-file (C source) -----------------------*/
466 618

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