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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.52 by root, Thu Jan 19 20:30:36 2006 UTC vs.
Revision 1.63 by root, Tue Oct 3 11:21:33 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)
73
74 static int
70get_pty_streams (int *fd_tty, char **ttydev) 75 get_pty (int *fd_tty, char **ttydev)
71{ 76 {
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; 77 int pfd;
75 78
76# if defined(PTYS_ARE_GETPT) 79# if defined(HAVE_GETPT)
77 pfd = getpt(); 80 pfd = getpt();
78# elif defined(PTYS_ARE_POSIX) 81# elif defined(HAVE_POSIX_OPENPT)
79 pfd = posix_openpt (O_RDWR); 82 pfd = posix_openpt (O_RDWR);
80# else 83# else
81 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 84 pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0);
82# endif 85# endif
86
83 if (pfd >= 0) 87 if (pfd >= 0)
84 { 88 {
85 if (grantpt (pfd) == 0 /* change slave permissions */ 89 if (grantpt (pfd) == 0 /* change slave permissions */
86 && unlockpt (pfd) == 0) 90 && unlockpt (pfd) == 0)
87 { /* slave now unlocked */ 91 { /* slave now unlocked */
88 *ttydev = strdup (ptsname (pfd)); /* get slave's name */ 92 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
89 return pfd; 93 return pfd;
90 } 94 }
91 95
92 close (pfd); 96 close (pfd);
93 } 97 }
94# endif
95#endif
96 98
97 return -1; 99 return -1;
98} 100 }
99 101
100static inline int 102#elif defined(HAVE_OPENPTY)
103
104 static int
101get_pty_openpty (int *fd_tty, char **ttydev) 105 get_pty (int *fd_tty, char **ttydev)
102{ 106 {
103#ifdef PTYS_ARE_OPENPTY
104 int pfd; 107 int pfd;
105 int res; 108 int res;
106 char tty_name[32]; 109 char tty_name[32];
107 110
108 res = openpty (&pfd, fd_tty, tty_name, NULL, NULL); 111 res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
112
109 if (res != -1) 113 if (res != -1)
110 { 114 {
111 *ttydev = strdup (tty_name); 115 *ttydev = strdup (tty_name);
116 return pfd;
117 }
118
119 return -1;
120 }
121
122#elif defined(HAVE__GETPTY)
123
124 static int
125 get_pty (int *fd_tty, char **ttydev)
126 {
127 int pfd;
128
129 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
130
131 if (*ttydev != NULL)
112 return pfd; 132 return pfd;
113 }
114#endif
115 133
116 return -1; 134 return -1;
117} 135 }
118 136
119static inline int 137#elif defined(HAVE_DEV_PTC)
120get_pty__getpty (int *fd_tty, char **ttydev)
121{
122#ifdef PTYS_ARE__GETPTY
123 int pfd;
124 138
125 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); 139 static int
126 if (*ttydev != NULL)
127 return pfd;
128#endif
129
130 return -1;
131}
132
133static inline int
134get_pty_ptc (int *fd_tty, char **ttydev) 140 get_pty (int *fd_tty, char **ttydev)
135{ 141 {
136#ifdef PTYS_ARE_PTC
137 int pfd; 142 int pfd;
138 143
139 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) 144 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
140 { 145 {
141 *ttydev = strdup (ttyname (pfd)); 146 *ttydev = strdup (ttyname (pfd));
142 return pfd; 147 return pfd;
143 } 148 }
144#endif
145 149
146 return -1; 150 return -1;
147} 151 }
148 152
149static inline int 153#elif defined(HAVE_DEV_CLONE)
154
155 static int
150get_pty_clone (int *fd_tty, char **ttydev) 156 get_pty (int *fd_tty, char **ttydev)
151{ 157 {
152#ifdef PTYS_ARE_CLONE
153 int pfd; 158 int pfd;
154 159
155 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 160 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
156 { 161 {
157 *ttydev = strdup (ptsname (pfd)); 162 *ttydev = strdup (ptsname (pfd));
158 return pfd; 163 return pfd;
159 } 164 }
160#endif
161 165
162 return -1; 166 return -1;
163} 167 }
164 168
165static inline int 169#else
170
171 /* Based on the code in openssh/openbsd-compat/bsd-openpty.c */
172 static int
166get_pty_numeric (int *fd_tty, char **ttydev) 173 get_pty (int *fd_tty, char **ttydev)
167{ 174 {
168#ifdef PTYS_ARE_NUMERIC
169 int pfd; 175 int pfd;
170 int idx; 176 int i;
171 char *c1, *c2; 177 char pty_name[32];
172 char pty_name[] = "/dev/ptyp???"; 178 char tty_name[32];
173 char tty_name[] = "/dev/ttyp???"; 179 const char *majors = "pqrstuvwxyzabcde";
180 const char *minors = "0123456789abcdef";
174 181
175 c1 = &(pty_name[sizeof (pty_name) - 4]);
176 c2 = &(tty_name[sizeof (tty_name) - 4]);
177
178 for (idx = 0; idx < 256; idx++) 182 for (i = 0; i < 256; i++)
179 {
180 sprintf (c1, "%d", idx);
181 sprintf (c2, "%d", idx);
182
183 if (access (tty_name, F_OK) < 0)
184 { 183 {
185 idx = 256; 184 snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]);
186 break; 185 snprintf(tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]);
187 }
188 186
189 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 187 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
190 { 188 {
189 snprintf(pty_name, 32, "/dev/ptyp%d", i);
190 snprintf(tty_name, 32, "/dev/ttyp%d", i);
191 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
192 continue;
193 }
194
191 if (access (tty_name, R_OK | W_OK) == 0) 195 if (access (tty_name, R_OK | W_OK) == 0)
192 { 196 {
193 *ttydev = strdup (tty_name); 197 *ttydev = strdup (tty_name);
194 return pfd; 198 return pfd;
195 } 199 }
196 200
197 close (pfd); 201 close (pfd);
198 } 202 }
199 }
200#endif
201 203
202 return -1; 204 return -1;
203} 205 }
204 206
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 207#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}
263 208
264/*----------------------------------------------------------------------*/ 209/*----------------------------------------------------------------------*/
265/* 210/*
266 * Returns tty file descriptor, or -1 on failure 211 * Returns tty file descriptor, or -1 on failure
267 */ 212 */
… …
278static int 223static int
279control_tty (int fd_tty) 224control_tty (int fd_tty)
280{ 225{
281 setsid (); 226 setsid ();
282 227
283#if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 228#if defined(HAVE_DEV_PTMX) && defined(I_PUSH)
284 /* 229 /*
285 * Push STREAMS modules: 230 * Push STREAMS modules:
286 * ptem: pseudo-terminal hardware emulation module. 231 * ptem: pseudo-terminal hardware emulation module.
287 * ldterm: standard terminal line discipline. 232 * ldterm: standard terminal line discipline.
288 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 233 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
… …
310 255
311 ioctl (fd_tty, TIOCSCTTY, NULL); 256 ioctl (fd_tty, TIOCSCTTY, NULL);
312 257
313 int fd = open ("/dev/tty", O_WRONLY); 258 int fd = open ("/dev/tty", O_WRONLY);
314 if (fd < 0) 259 if (fd < 0)
315 return -1; /* fatal */ 260 return -1; /* fatal */
316 261
317 close (fd); 262 close (fd);
318 263
319 return 0; 264 return 0;
320} 265}
321 266
322void 267void
323rxvt_ptytty::close_tty () 268ptytty::close_tty ()
324{ 269{
325 if (tty < 0) 270 if (tty < 0)
326 return; 271 return;
327 272
328 close (tty); 273 close (tty);
329 tty = -1; 274 tty = -1;
330} 275}
331 276
332bool 277bool
333rxvt_ptytty::make_controlling_tty () 278ptytty::make_controlling_tty ()
334{ 279{
335 return control_tty (tty) >= 0; 280 return control_tty (tty) >= 0;
336} 281}
337 282
338void 283void
339rxvt_ptytty::set_utf8_mode (bool on) 284ptytty::set_utf8_mode (bool on)
340{ 285{
341#ifdef IUTF8 286#ifdef IUTF8
342 if (pty < 0) 287 if (pty < 0)
343 return; 288 return;
344 289
… …
383 gid = 0; 328 gid = 0;
384 } 329 }
385 } 330 }
386} ttyconf; 331} ttyconf;
387 332
388rxvt_ptytty_unix::rxvt_ptytty_unix () 333ptytty_unix::ptytty_unix ()
389{ 334{
390 name = 0; 335 name = 0;
391#if UTMP_SUPPORT 336#if UTMP_SUPPORT
392 cmd_pid = 0; 337 cmd_pid = 0;
393#endif 338#endif
394} 339}
395 340
396rxvt_ptytty_unix::~rxvt_ptytty_unix () 341ptytty_unix::~ptytty_unix ()
397{ 342{
398#if UTMP_SUPPORT 343#if UTMP_SUPPORT
399 logout (); 344 logout ();
400#endif 345#endif
401 put (); 346 put ();
402} 347}
403 348
404void 349void
405rxvt_ptytty_unix::put () 350ptytty_unix::put ()
406{ 351{
352 if (name)
353 {
407 chmod (name, RESTORE_TTY_MODE); 354 chmod (name, RESTORE_TTY_MODE);
408 chown (name, 0, ttyconf.gid); 355 chown (name, 0, ttyconf.gid);
356 }
409 357
410 close_tty (); 358 close_tty ();
411 359
412 if (pty >= 0) 360 if (pty >= 0)
413 close (pty); 361 close (pty);
… …
417 pty = tty = -1; 365 pty = tty = -1;
418 name = 0; 366 name = 0;
419} 367}
420 368
421bool 369bool
422rxvt_ptytty_unix::get () 370ptytty_unix::get ()
423{ 371{
424 /* get master (pty) */ 372 /* get master (pty) */
425 if ((pty = get_pty (&tty, &name)) < 0) 373 if ((pty = get_pty (&tty, &name)) < 0)
426 return false; 374 return false;
427 375
… …
446 } 394 }
447 395
448 return true; 396 return true;
449} 397}
450 398
451#if PTYTTY_HELPER
452
453static int sock_fd;
454static int pid;
455
456struct command
457{
458 enum { get, login, destroy } type;
459
460 rxvt_ptytty *id;
461
462 bool login_shell;
463 int cmd_pid;
464 char hostname[512]; // arbitrary, but should be plenty
465};
466
467struct rxvt_ptytty_proxy : zero_initialized, rxvt_ptytty
468{
469 rxvt_ptytty *id;
470
471 ~rxvt_ptytty_proxy ();
472
473 bool get ();
474 void login (int cmd_pid, bool login_shell, const char *hostname);
475};
476
477bool
478rxvt_ptytty_proxy::get ()
479{
480 command cmd;
481
482 cmd.type = command::get;
483
484 write (sock_fd, &cmd, sizeof (cmd));
485
486 if (read (sock_fd, &id, sizeof (id)) != sizeof (id))
487 rxvt_fatal ("protocol error while creating pty using helper process, aborting.\n");
488
489 if (!id)
490 return false;
491
492 if ((pty = rxvt_recv_fd (sock_fd)) < 0
493 || (tty = rxvt_recv_fd (sock_fd)) < 0)
494 rxvt_fatal ("protocol error while reading pty/tty fds from helper process, aborting.\n");
495
496 return true;
497}
498
499void
500rxvt_ptytty_proxy::login (int cmd_pid, bool login_shell, const char *hostname)
501{
502 command cmd;
503
504 cmd.type = command::login;
505 cmd.id = id;
506 cmd.cmd_pid = cmd_pid;
507 cmd.login_shell = login_shell;
508 strncpy (cmd.hostname, hostname, sizeof (cmd.hostname));
509
510 write (sock_fd, &cmd, sizeof (cmd));
511}
512
513rxvt_ptytty_proxy::~rxvt_ptytty_proxy ()
514{
515 command cmd;
516
517 cmd.type = command::destroy;
518 cmd.id = id;
519
520 write (sock_fd, &cmd, sizeof (cmd));
521}
522
523static
524void serve ()
525{
526 command cmd;
527 vector<rxvt_ptytty *> ptys;
528
529 while (read (sock_fd, &cmd, sizeof (command)) == sizeof (command))
530 {
531 if (cmd.type == command::get)
532 {
533 // -> id ptyfd ttyfd
534 cmd.id = new rxvt_ptytty_unix;
535
536 if (cmd.id->get ())
537 {
538 write (sock_fd, &cmd.id, sizeof (cmd.id));
539 ptys.push_back (cmd.id);
540
541 rxvt_send_fd (sock_fd, cmd.id->pty);
542 rxvt_send_fd (sock_fd, cmd.id->tty);
543 }
544 else
545 {
546 delete cmd.id;
547 cmd.id = 0;
548 write (sock_fd, &cmd.id, sizeof (cmd.id));
549 }
550 }
551 else if (cmd.type == command::login)
552 {
553#if UTMP_SUPPORT
554 if (find (ptys.begin (), ptys.end (), cmd.id))
555 {
556 cmd.hostname[sizeof (cmd.hostname) - 1] = 0;
557 cmd.id->login (cmd.cmd_pid, cmd.login_shell, cmd.hostname);
558 }
559#endif
560 }
561 else if (cmd.type == command::destroy)
562 {
563 rxvt_ptytty **pty = find (ptys.begin (), ptys.end (), cmd.id);
564
565 if (pty)
566 {
567 delete *pty;
568 ptys.erase (pty);
569 }
570 }
571 else
572 break;
573 }
574
575 // destroy all ptys
576 for (rxvt_ptytty **i = ptys.end (); i-- > ptys.begin (); )
577 delete *i;
578}
579
580void rxvt_ptytty_server ()
581{
582 int sv[2];
583
584 if (socketpair (AF_UNIX, SOCK_STREAM, 0, sv))
585 rxvt_fatal ("could not create socket to communicate with pty/sessiondb helper, aborting.\n");
586
587 pid = fork ();
588
589 if (pid < 0)
590 rxvt_fatal ("could not create pty/sessiondb helper process, aborting.\n");
591
592 if (pid)
593 {
594 // client, urxvt
595 sock_fd = sv[0];
596 close (sv[1]);
597 fcntl (sock_fd, F_SETFD, FD_CLOEXEC);
598 }
599 else
600 {
601 // server, pty-helper
602 sock_fd = sv[1];
603
604 for (int fd = 0; fd < 1023; fd++)
605 if (fd != sock_fd)
606 close (fd);
607
608 serve ();
609 _exit (EXIT_SUCCESS);
610 }
611}
612
613#endif
614
615// a "factory" *g*
616rxvt_ptytty *
617rxvt_new_ptytty ()
618{
619#if PTYTTY_HELPER
620 if (pid > 0)
621 // use helper process
622 return new rxvt_ptytty_proxy;
623 else
624#endif
625 return new rxvt_ptytty_unix;
626}
627
628/*----------------------- end-of-file (C source) -----------------------*/
629

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