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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.50 by root, Thu Jan 19 16:43:36 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"
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>
37#endif 42#endif
38#if defined(PTYS_ARE_PTMX) && defined(HAVE_SYS_STROPTS_H) 43#if defined(HAVE_DEV_PTMX) && defined(HAVE_SYS_STROPTS_H)
39# include <sys/stropts.h> /* for I_PUSH */ 44# include <sys/stropts.h> /* for I_PUSH */
40#endif 45#endif
41#ifdef HAVE_ISASTREAM 46#ifdef HAVE_ISASTREAM
42# include <stropts.h> 47# include <stropts.h>
43#endif 48#endif
… …
46#elif defined(HAVE_LIBUTIL_H) 51#elif defined(HAVE_LIBUTIL_H)
47# include <libutil.h> 52# include <libutil.h>
48#elif defined(HAVE_UTIL_H) 53#elif defined(HAVE_UTIL_H)
49# include <util.h> 54# include <util.h>
50#endif 55#endif
56#ifdef TTY_GID_SUPPORT
57#include <grp.h>
58#endif
51 59
52#include <cstdio> 60#include <cstdio>
53#include <grp.h>
54
55#include "rxvtutil.h"
56#include "fdpass.h"
57#include "ptytty.h"
58 61
59///////////////////////////////////////////////////////////////////////////// 62/////////////////////////////////////////////////////////////////////////////
60 63
61/* ------------------------------------------------------------------------- * 64/* ------------------------------------------------------------------------- *
62 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 65 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
… …
64/* 67/*
65 * Returns pty file descriptor, or -1 on failure 68 * Returns pty file descriptor, or -1 on failure
66 * 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.
67 * 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
68 */ 71 */
69static inline int 72#if defined(UNIX98_PTY)
73static int
70get_pty_streams (int *fd_tty, char **ttydev) 74get_pty (int *fd_tty, char **ttydev)
71{ 75{
72#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
73# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_POSIX) || defined(PTYS_ARE_PTMX)
74 int pfd; 76 int pfd;
75 77
76# if defined(PTYS_ARE_GETPT) 78# if defined(HAVE_GETPT)
77 pfd = getpt(); 79 pfd = getpt();
78# elif defined(PTYS_ARE_POSIX) 80# elif defined(HAVE_POSIX_OPENPT)
79 pfd = posix_openpt (O_RDWR); 81 pfd = posix_openpt (O_RDWR);
80# else 82# else
81 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 83 pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0);
82# endif 84# endif
83 if (pfd >= 0) 85 if (pfd >= 0)
84 { 86 {
85 if (grantpt (pfd) == 0 /* change slave permissions */ 87 if (grantpt (pfd) == 0 /* change slave permissions */
86 && unlockpt (pfd) == 0) 88 && unlockpt (pfd) == 0)
… …
89 return pfd; 91 return pfd;
90 } 92 }
91 93
92 close (pfd); 94 close (pfd);
93 } 95 }
94# endif
95#endif
96 96
97 return -1; 97 return -1;
98} 98}
99 99#elif defined(HAVE_OPENPTY)
100static inline int 100static int
101get_pty_openpty (int *fd_tty, char **ttydev) 101get_pty (int *fd_tty, char **ttydev)
102{ 102{
103#ifdef PTYS_ARE_OPENPTY
104 int pfd; 103 int pfd;
105 int res; 104 int res;
106 char tty_name[sizeof "/dev/pts/????\0"]; 105 char tty_name[32];
107 106
108 res = openpty (&pfd, fd_tty, tty_name, NULL, NULL); 107 res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
109 if (res != -1) 108 if (res != -1)
110 { 109 {
111 *ttydev = strdup (tty_name); 110 *ttydev = strdup (tty_name);
112 return pfd; 111 return pfd;
113 } 112 }
114#endif
115 113
116 return -1; 114 return -1;
117} 115}
118 116#elif defined(HAVE__GETPTY)
119static inline int 117static int
120get_pty__getpty (int *fd_tty, char **ttydev) 118get_pty (int *fd_tty, char **ttydev)
121{ 119{
122#ifdef PTYS_ARE__GETPTY
123 int pfd; 120 int pfd;
124 121
125 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); 122 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
126 if (*ttydev != NULL) 123 if (*ttydev != NULL)
127 return pfd; 124 return pfd;
128#endif
129 125
130 return -1; 126 return -1;
131} 127}
132 128#elif defined(HAVE_DEV_PTC)
133static inline int 129static int
134get_pty_ptc (int *fd_tty, char **ttydev) 130get_pty (int *fd_tty, char **ttydev)
135{ 131{
136#ifdef PTYS_ARE_PTC
137 int pfd; 132 int pfd;
138 133
139 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) 134 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
140 { 135 {
141 *ttydev = strdup (ttyname (pfd)); 136 *ttydev = strdup (ttyname (pfd));
142 return pfd; 137 return pfd;
143 } 138 }
144#endif
145 139
146 return -1; 140 return -1;
147} 141}
148 142#elif defined(HAVE_DEV_CLONE)
149static inline int 143static int
150get_pty_clone (int *fd_tty, char **ttydev) 144get_pty (int *fd_tty, char **ttydev)
151{ 145{
152#ifdef PTYS_ARE_CLONE
153 int pfd; 146 int pfd;
154 147
155 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 148 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
156 { 149 {
157 *ttydev = strdup (ptsname (pfd)); 150 *ttydev = strdup (ptsname (pfd));
158 return pfd; 151 return pfd;
159 } 152 }
160#endif
161 153
162 return -1; 154 return -1;
163} 155}
164 156#else
165static inline int 157/* Based on the code in openssh/openbsd-compat/bsd-openpty.c */
158static int
166get_pty_numeric (int *fd_tty, char **ttydev) 159get_pty (int *fd_tty, char **ttydev)
167{ 160{
168#ifdef PTYS_ARE_NUMERIC
169 int pfd; 161 int pfd;
170 int idx; 162 int i;
171 char *c1, *c2; 163 char pty_name[32];
172 char pty_name[] = "/dev/ptyp???"; 164 char tty_name[32];
173 char tty_name[] = "/dev/ttyp???"; 165 const char *majors = "pqrstuvwxyzabcde";
174 166 const char *minors = "0123456789abcdef";
175 c1 = &(pty_name[sizeof (pty_name) - 4]);
176 c2 = &(tty_name[sizeof (tty_name) - 4]);
177
178 for (idx = 0; idx < 256; idx++) 167 for (i = 0; i < 256; i++)
179 { 168 {
180 sprintf (c1, "%d", idx); 169 snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]);
181 sprintf (c2, "%d", idx); 170 snprintf(tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]);
182
183 if (access (tty_name, F_OK) < 0)
184 {
185 idx = 256;
186 break;
187 }
188
189 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 171 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
172 {
173 snprintf(pty_name, 32, "/dev/ptyp%d", i);
174 snprintf(tty_name, 32, "/dev/ttyp%d", i);
175 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
176 continue;
190 { 177 }
191 if (access (tty_name, R_OK | W_OK) == 0) 178 if (access (tty_name, R_OK | W_OK) == 0)
192 { 179 {
193 *ttydev = strdup (tty_name); 180 *ttydev = strdup (tty_name);
194 return pfd; 181 return pfd;
195 } 182 }
196 183
197 close (pfd); 184 close (pfd);
198 }
199 } 185 }
200#endif
201 186
202 return -1; 187 return -1;
203} 188}
204
205static inline int
206get_pty_searched (int *fd_tty, char **ttydev)
207{
208#ifdef PTYS_ARE_SEARCHED
209# ifndef PTYCHAR1
210# define PTYCHAR1 "pqrstuvwxyz"
211# endif 189#endif
212# ifndef PTYCHAR2
213# define PTYCHAR2 "0123456789abcdef"
214# endif
215 int pfd;
216 const char *c1, *c2;
217 char pty_name[] = "/dev/pty??";
218 char tty_name[] = "/dev/tty??";
219
220 for (c1 = PTYCHAR1; *c1; c1++)
221 {
222 pty_name[ (sizeof (pty_name) - 3)] =
223 tty_name[ (sizeof (pty_name) - 3)] = *c1;
224
225 for (c2 = PTYCHAR2; *c2; c2++)
226 {
227 pty_name[ (sizeof (pty_name) - 2)] =
228 tty_name[ (sizeof (pty_name) - 2)] = *c2;
229
230 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
231 {
232 if (access (tty_name, R_OK | W_OK) == 0)
233 {
234 *ttydev = strdup (tty_name);
235 return pfd;
236 }
237
238 close (pfd);
239 }
240 }
241 }
242#endif
243
244 return -1;
245}
246
247static int
248get_pty (int *fd_tty, char **ttydev)
249{
250 int pfd;
251
252 if ((pfd = get_pty_streams (fd_tty, ttydev)) != -1
253 || (pfd = get_pty_openpty (fd_tty, ttydev)) != -1
254 || (pfd = get_pty__getpty (fd_tty, ttydev)) != -1
255 || (pfd = get_pty_ptc (fd_tty, ttydev)) != -1
256 || (pfd = get_pty_clone (fd_tty, ttydev)) != -1
257 || (pfd = get_pty_numeric (fd_tty, ttydev)) != -1
258 || (pfd = get_pty_searched (fd_tty, ttydev)) != -1)
259 return pfd;
260
261 return -1;
262}
263 190
264/*----------------------------------------------------------------------*/ 191/*----------------------------------------------------------------------*/
265/* 192/*
266 * Returns tty file descriptor, or -1 on failure 193 * Returns tty file descriptor, or -1 on failure
267 */ 194 */
… …
278static int 205static int
279control_tty (int fd_tty) 206control_tty (int fd_tty)
280{ 207{
281 setsid (); 208 setsid ();
282 209
283#if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 210#if defined(HAVE_DEV_PTMX) && defined(I_PUSH)
284 /* 211 /*
285 * Push STREAMS modules: 212 * Push STREAMS modules:
286 * ptem: pseudo-terminal hardware emulation module. 213 * ptem: pseudo-terminal hardware emulation module.
287 * ldterm: standard terminal line discipline. 214 * ldterm: standard terminal line discipline.
288 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 215 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
… …
310 237
311 ioctl (fd_tty, TIOCSCTTY, NULL); 238 ioctl (fd_tty, TIOCSCTTY, NULL);
312 239
313 int fd = open ("/dev/tty", O_WRONLY); 240 int fd = open ("/dev/tty", O_WRONLY);
314 if (fd < 0) 241 if (fd < 0)
315 return -1; /* fatal */ 242 return -1; /* fatal */
316 243
317 close (fd); 244 close (fd);
318 245
319 return 0; 246 return 0;
320} 247}
321 248
322void 249void
323rxvt_ptytty::close_tty () 250ptytty::close_tty ()
324{ 251{
325 if (tty < 0) 252 if (tty < 0)
326 return; 253 return;
327 254
328 close (tty); 255 close (tty);
329 tty = -1; 256 tty = -1;
330} 257}
331 258
332bool 259bool
333rxvt_ptytty::make_controlling_tty () 260ptytty::make_controlling_tty ()
334{ 261{
335 return control_tty (tty) >= 0; 262 return control_tty (tty) >= 0;
336} 263}
337 264
338void 265void
339rxvt_ptytty::set_utf8_mode (bool on) 266ptytty::set_utf8_mode (bool on)
340{ 267{
341#ifdef IUTF8 268#ifdef IUTF8
342 if (pty < 0) 269 if (pty < 0)
343 return; 270 return;
344 271
… …
383 gid = 0; 310 gid = 0;
384 } 311 }
385 } 312 }
386} ttyconf; 313} ttyconf;
387 314
388rxvt_ptytty_unix::rxvt_ptytty_unix () 315ptytty_unix::ptytty_unix ()
389{ 316{
390 pty = tty = -1;
391 name = 0; 317 name = 0;
392#if UTMP_SUPPORT 318#if UTMP_SUPPORT
393 cmd_pid = 0; 319 cmd_pid = 0;
394#endif 320#endif
395} 321}
396 322
397rxvt_ptytty_unix::~rxvt_ptytty_unix () 323ptytty_unix::~ptytty_unix ()
398{ 324{
399#if UTMP_SUPPORT 325#if UTMP_SUPPORT
400 logout (); 326 logout ();
401#endif 327#endif
402 put (); 328 put ();
403} 329}
404 330
405void 331void
406rxvt_ptytty_unix::put () 332ptytty_unix::put ()
407{ 333{
408 chmod (name, RESTORE_TTY_MODE); 334 chmod (name, RESTORE_TTY_MODE);
409 chown (name, 0, ttyconf.gid); 335 chown (name, 0, ttyconf.gid);
410 336
411 close_tty (); 337 close_tty ();
… …
418 pty = tty = -1; 344 pty = tty = -1;
419 name = 0; 345 name = 0;
420} 346}
421 347
422bool 348bool
423rxvt_ptytty_unix::get () 349ptytty_unix::get ()
424{ 350{
425 /* get master (pty) */ 351 /* get master (pty) */
426 if ((pty = get_pty (&tty, &name)) < 0) 352 if ((pty = get_pty (&tty, &name)) < 0)
427 return false; 353 return false;
428 354
… …
447 } 373 }
448 374
449 return true; 375 return true;
450} 376}
451 377
452#if PTYTTY_HELPER
453
454static int sock_fd;
455static int pid;
456
457struct command
458{
459 enum { get, login, destroy } type;
460
461 rxvt_ptytty *id;
462
463 bool login_shell;
464 int cmd_pid;
465 char hostname[512]; // arbitrary, but should be plenty
466};
467
468struct rxvt_ptytty_proxy : zero_initialized, rxvt_ptytty
469{
470 rxvt_ptytty *id;
471
472 ~rxvt_ptytty_proxy ();
473
474 bool get ();
475 void login (int cmd_pid, bool login_shell, const char *hostname);
476};
477
478bool
479rxvt_ptytty_proxy::get ()
480{
481 command cmd;
482
483 cmd.type = command::get;
484
485 write (sock_fd, &cmd, sizeof (cmd));
486
487 if (read (sock_fd, &id, sizeof (id)) != sizeof (id))
488 rxvt_fatal ("protocol error while creating pty using helper process, aborting.\n");
489
490 if (!id)
491 return false;
492
493 if ((pty = rxvt_recv_fd (sock_fd)) < 0
494 || (tty = rxvt_recv_fd (sock_fd)) < 0)
495 rxvt_fatal ("protocol error while reading pty/tty fds from helper process, aborting.\n");
496
497 return true;
498}
499
500void
501rxvt_ptytty_proxy::login (int cmd_pid, bool login_shell, const char *hostname)
502{
503 command cmd;
504
505 cmd.type = command::login;
506 cmd.id = id;
507 cmd.cmd_pid = cmd_pid;
508 cmd.login_shell = login_shell;
509 strncpy (cmd.hostname, hostname, sizeof (cmd.hostname));
510
511 write (sock_fd, &cmd, sizeof (cmd));
512}
513
514rxvt_ptytty_proxy::~rxvt_ptytty_proxy ()
515{
516 command cmd;
517
518 cmd.type = command::destroy;
519 cmd.id = id;
520
521 write (sock_fd, &cmd, sizeof (cmd));
522}
523
524static
525void serve ()
526{
527 command cmd;
528 vector<rxvt_ptytty *> ptys;
529
530 while (read (sock_fd, &cmd, sizeof (command)) == sizeof (command))
531 {
532 if (cmd.type == command::get)
533 {
534 // -> id ptyfd ttyfd
535 cmd.id = new rxvt_ptytty_unix;
536
537 if (cmd.id->get ())
538 {
539 write (sock_fd, &cmd.id, sizeof (cmd.id));
540 ptys.push_back (cmd.id);
541
542 rxvt_send_fd (sock_fd, cmd.id->pty);
543 rxvt_send_fd (sock_fd, cmd.id->tty);
544 }
545 else
546 {
547 delete cmd.id;
548 cmd.id = 0;
549 write (sock_fd, &cmd.id, sizeof (cmd.id));
550 }
551 }
552 else if (cmd.type == command::login)
553 {
554#if UTMP_SUPPORT
555 if (find (ptys.begin (), ptys.end (), cmd.id))
556 {
557 cmd.hostname[sizeof (cmd.hostname) - 1] = 0;
558 cmd.id->login (cmd.cmd_pid, cmd.login_shell, cmd.hostname);
559 }
560#endif
561 }
562 else if (cmd.type == command::destroy)
563 {
564 rxvt_ptytty **pty = find (ptys.begin (), ptys.end (), cmd.id);
565
566 if (pty)
567 {
568 delete *pty;
569 ptys.erase (pty);
570 }
571 }
572 else
573 break;
574 }
575
576 // destroy all ptys
577 for (rxvt_ptytty **i = ptys.end (); i-- > ptys.begin (); )
578 delete *i;
579}
580
581void rxvt_ptytty_server ()
582{
583 int sv[2];
584
585 if (socketpair (AF_UNIX, SOCK_STREAM, 0, sv))
586 rxvt_fatal ("could not create socket to communicate with pty/sessiondb helper, aborting.\n");
587
588 pid = fork ();
589
590 if (pid < 0)
591 rxvt_fatal ("could not create pty/sessiondb helper process, aborting.\n");
592
593 if (pid)
594 {
595 // client, urxvt
596 sock_fd = sv[0];
597 close (sv[1]);
598 fcntl (sock_fd, F_SETFD, FD_CLOEXEC);
599 }
600 else
601 {
602 // server, pty-helper
603 sock_fd = sv[1];
604
605 for (int fd = 0; fd < 1023; fd++)
606 if (fd != sock_fd)
607 close (fd);
608
609 serve ();
610 _exit (EXIT_SUCCESS);
611 }
612}
613
614#endif
615
616// a "factory" *g*
617rxvt_ptytty *
618rxvt_new_ptytty ()
619{
620#if PTYTTY_HELPER
621 if (pid > 0)
622 // use helper process
623 return new rxvt_ptytty_proxy;
624 else
625#endif
626 return new rxvt_ptytty_unix;
627}
628
629/*----------------------- end-of-file (C source) -----------------------*/
630

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