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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.46 by root, Thu Jan 19 09:57:20 2006 UTC vs.
Revision 1.69 by root, Mon May 5 16:51:52 2008 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> 37#include <sys/stat.h>
32#include <unistd.h> 38#include <unistd.h>
33#include <fcntl.h> 39#include <fcntl.h>
34 40
35#ifdef HAVE_SYS_IOCTL_H 41#ifdef HAVE_SYS_IOCTL_H
36# include <sys/ioctl.h> 42# include <sys/ioctl.h>
37#endif 43#endif
38#if defined(PTYS_ARE_PTMX) && defined(HAVE_SYS_STROPTS_H) 44#if defined(HAVE_DEV_PTMX) && defined(HAVE_SYS_STROPTS_H)
39# include <sys/stropts.h> /* for I_PUSH */ 45# include <sys/stropts.h> /* for I_PUSH */
40#endif 46#endif
41#ifdef HAVE_ISASTREAM 47#if defined(HAVE_ISASTREAM) && defined(HAVE_STROPTS_H)
42# include <stropts.h> 48# include <stropts.h>
43#endif 49#endif
44#if defined(HAVE_PTY_H) 50#if defined(HAVE_PTY_H)
45# include <pty.h> 51# include <pty.h>
46#elif defined(HAVE_LIBUTIL_H) 52#elif defined(HAVE_LIBUTIL_H)
47# include <libutil.h> 53# include <libutil.h>
48#elif defined(HAVE_UTIL_H) 54#elif defined(HAVE_UTIL_H)
49# include <util.h> 55# include <util.h>
50#endif 56#endif
57#ifdef TTY_GID_SUPPORT
58#include <grp.h>
59#endif
51 60
52#include <cstdio> 61#include <cstdio>
53#include <grp.h>
54
55#include "rxvtutil.h"
56#include "fdpass.h"
57#include "ptytty.h"
58 62
59///////////////////////////////////////////////////////////////////////////// 63/////////////////////////////////////////////////////////////////////////////
60 64
61/* ------------------------------------------------------------------------- * 65/* ------------------------------------------------------------------------- *
62 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 66 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
63 * ------------------------------------------------------------------------- */ 67 * ------------------------------------------------------------------------- */
64/* 68/*
65 * Returns pty file descriptor, or -1 on failure 69 * Returns pty file descriptor, or -1 on failure
66 * If successful, ttydev is set to the name of the slave device. 70 * 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 71 * fd_tty _may_ also be set to an open fd to the slave device
68 */ 72 */
69static inline int 73#if defined(UNIX98_PTY)
74
75 static int
70get_pty_streams (int *fd_tty, char **ttydev) 76 get_pty (int *fd_tty, char **ttydev)
71{ 77 {
72#ifdef NO_SETOWNER_TTYDEV
73 int pfd; 78 int pfd;
74 79
75# if defined(PTYS_ARE_GETPT) 80# if defined(HAVE_GETPT)
76 pfd = getpt(); 81 pfd = getpt();
77# elif defined(PTYS_ARE_POSIX) 82# elif defined(HAVE_POSIX_OPENPT)
78 pfd = posix_openpt (O_RDWR); 83 pfd = posix_openpt (O_RDWR);
79# else 84# else
80 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 85 pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0);
81# endif 86# endif
87
82 if (pfd >= 0) 88 if (pfd >= 0)
83 { 89 {
84 if (grantpt (pfd) == 0 /* change slave permissions */ 90 if (grantpt (pfd) == 0 /* change slave permissions */
85 && unlockpt (pfd) == 0) 91 && unlockpt (pfd) == 0)
92 {
86 { /* slave now unlocked */ 93 /* slave now unlocked */
87 *ttydev = strdup (ptsname (pfd)); /* get slave's name */ 94 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
88 return pfd; 95 return pfd;
89 } 96 }
90 97
91 close (pfd); 98 close (pfd);
92 } 99 }
93#endif
94 100
95 return -1; 101 return -1;
96} 102 }
97 103
98static inline int 104#elif defined(HAVE_OPENPTY)
105
106 static int
99get_pty_openpty (int *fd_tty, char **ttydev) 107 get_pty (int *fd_tty, char **ttydev)
100{ 108 {
101#ifdef PTYS_ARE_OPENPTY
102 int pfd; 109 int pfd;
103 int res; 110 int res;
104 char tty_name[sizeof "/dev/pts/????\0"]; 111
105
106 res = openpty (&pfd, fd_tty, tty_name, NULL, NULL); 112 res = openpty (&pfd, fd_tty, NULL, NULL, NULL);
113
107 if (res != -1) 114 if (res != -1)
108 { 115 {
109 *ttydev = strdup (tty_name); 116 *ttydev = strdup (ttyname (*fd_tty));
110 return pfd; 117 return pfd;
111 } 118 }
112#endif
113 119
114 return -1; 120 return -1;
115} 121 }
116 122
117static inline int 123#elif defined(HAVE__GETPTY)
118get_pty__getpty (int *fd_tty, char **ttydev)
119{
120#ifdef PTYS_ARE__GETPTY
121 int pfd;
122 124
123 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); 125 static int
124 if (*ttydev != NULL)
125 return pfd;
126#endif
127
128 return -1;
129}
130
131static inline int
132get_pty_ptc (int *fd_tty, char **ttydev) 126 get_pty (int *fd_tty, char **ttydev)
133{ 127 {
134#ifdef PTYS_ARE_PTC
135 int pfd; 128 int pfd;
129 char *slave;
136 130
131 slave = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
132
133 if (slave != NULL)
134 {
135 *ttydev = strdup (slave);
136 return pfd;
137 }
138
139 return -1;
140 }
141
142#elif defined(HAVE_DEV_PTC)
143
144 static int
145 get_pty (int *fd_tty, char **ttydev)
146 {
147 int pfd;
148
137 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) 149 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
138 { 150 {
139 *ttydev = strdup (ttyname (pfd)); 151 *ttydev = strdup (ttyname (pfd));
140 return pfd; 152 return pfd;
141 } 153 }
142#endif
143 154
144 return -1; 155 return -1;
145} 156 }
146 157
147static inline int 158#elif defined(HAVE_DEV_CLONE)
159
160 static int
148get_pty_clone (int *fd_tty, char **ttydev) 161 get_pty (int *fd_tty, char **ttydev)
149{ 162 {
150#ifdef PTYS_ARE_CLONE
151 int pfd; 163 int pfd;
152 164
153 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 165 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
154 { 166 {
155 *ttydev = strdup (ptsname (pfd)); 167 *ttydev = strdup (ptsname (pfd));
156 return pfd; 168 return pfd;
157 } 169 }
158#endif
159 170
160 return -1; 171 return -1;
161} 172 }
162 173
163static inline int 174#else
175
176 /* Based on the code in openssh/openbsd-compat/bsd-openpty.c */
177 static int
164get_pty_numeric (int *fd_tty, char **ttydev) 178 get_pty (int *fd_tty, char **ttydev)
165{ 179 {
166#ifdef PTYS_ARE_NUMERIC
167 int pfd; 180 int pfd;
168 int idx; 181 int i;
169 char *c1, *c2; 182 char pty_name[32];
170 char pty_name[] = "/dev/ptyp???"; 183 char tty_name[32];
171 char tty_name[] = "/dev/ttyp???"; 184 const char *majors = "pqrstuvwxyzabcde";
185 const char *minors = "0123456789abcdef";
172 186
173 c1 = &(pty_name[sizeof (pty_name) - 4]);
174 c2 = &(tty_name[sizeof (tty_name) - 4]);
175
176 for (idx = 0; idx < 256; idx++) 187 for (i = 0; i < 256; i++)
177 {
178 sprintf (c1, "%d", idx);
179 sprintf (c2, "%d", idx);
180
181 if (access (tty_name, F_OK) < 0)
182 { 188 {
183 idx = 256; 189 snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]);
184 break; 190 snprintf(tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]);
185 }
186 191
187 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 192 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
188 { 193 {
194 snprintf(pty_name, 32, "/dev/ptyp%d", i);
195 snprintf(tty_name, 32, "/dev/ttyp%d", i);
196 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
197 continue;
198 }
199
189 if (access (tty_name, R_OK | W_OK) == 0) 200 if (access (tty_name, R_OK | W_OK) == 0)
190 { 201 {
191 *ttydev = strdup (tty_name); 202 *ttydev = strdup (tty_name);
192 return pfd; 203 return pfd;
193 } 204 }
194 205
195 close (pfd); 206 close (pfd);
196 } 207 }
197 }
198#endif
199 208
200 return -1; 209 return -1;
201} 210 }
202 211
203static inline int
204get_pty_searched (int *fd_tty, char **ttydev)
205{
206#ifdef PTYS_ARE_SEARCHED
207# ifndef PTYCHAR1
208# define PTYCHAR1 "pqrstuvwxyz"
209# endif 212#endif
210# ifndef PTYCHAR2
211# define PTYCHAR2 "0123456789abcdef"
212# endif
213 int pfd;
214 const char *c1, *c2;
215 char pty_name[] = "/dev/pty??";
216 char tty_name[] = "/dev/tty??";
217
218 for (c1 = PTYCHAR1; *c1; c1++)
219 {
220 pty_name[ (sizeof (pty_name) - 3)] =
221 tty_name[ (sizeof (pty_name) - 3)] = *c1;
222
223 for (c2 = PTYCHAR2; *c2; c2++)
224 {
225 pty_name[ (sizeof (pty_name) - 2)] =
226 tty_name[ (sizeof (pty_name) - 2)] = *c2;
227
228 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
229 {
230 if (access (tty_name, R_OK | W_OK) == 0)
231 {
232 *ttydev = strdup (tty_name);
233 return pfd;
234 }
235
236 close (pfd);
237 }
238 }
239 }
240#endif
241
242 return -1;
243}
244
245static int
246get_pty (int *fd_tty, char **ttydev)
247{
248 int pfd;
249
250 if ((pfd = get_pty_streams (fd_tty, ttydev)) != -1
251 || (pfd = get_pty_openpty (fd_tty, ttydev)) != -1
252 || (pfd = get_pty__getpty (fd_tty, ttydev)) != -1
253 || (pfd = get_pty_ptc (fd_tty, ttydev)) != -1
254 || (pfd = get_pty_clone (fd_tty, ttydev)) != -1
255 || (pfd = get_pty_numeric (fd_tty, ttydev)) != -1
256 || (pfd = get_pty_searched (fd_tty, ttydev)) != -1)
257 return pfd;
258
259 return -1;
260}
261 213
262/*----------------------------------------------------------------------*/ 214/*----------------------------------------------------------------------*/
263/* 215/*
264 * Returns tty file descriptor, or -1 on failure 216 * Returns tty file descriptor, or -1 on failure
265 */ 217 */
266static int 218static int
267get_tty (char *ttydev) 219get_tty (char *ttydev)
268{ 220{
269 return open (ttydev, O_RDWR | O_NOCTTY, 0); 221 return open (ttydev, O_RDWR | O_NOCTTY, 0);
… …
274 * Make our tty a controlling tty so that /dev/tty points to us 226 * Make our tty a controlling tty so that /dev/tty points to us
275 */ 227 */
276static int 228static int
277control_tty (int fd_tty) 229control_tty (int fd_tty)
278{ 230{
231 int fd;
232
279 setsid (); 233 setsid ();
280 234
281# if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 235#if defined(HAVE_DEV_PTMX) && defined(I_PUSH)
282 /* 236 /*
283 * Push STREAMS modules: 237 * Push STREAMS modules:
284 * ptem: pseudo-terminal hardware emulation module. 238 * ptem: pseudo-terminal hardware emulation module.
285 * ldterm: standard terminal line discipline. 239 * ldterm: standard terminal line discipline.
286 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 240 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
… …
294 * documentation is really unclear about whether it is any close () on 248 * documentation is really unclear about whether it is any close () on
295 * the master side or the last close () - i.e. a proper STREAMS dismantling 249 * the master side or the last close () - i.e. a proper STREAMS dismantling
296 * close () - on the master side which causes a hang up to be sent 250 * close () - on the master side which causes a hang up to be sent
297 * through - Geoff Wing 251 * through - Geoff Wing
298 */ 252 */
299# ifdef HAVE_ISASTREAM 253#if defined(HAVE_ISASTREAM) && defined(HAVE_STROPTS_H)
300 if (isastream (fd_tty) == 1) 254 if (isastream (fd_tty) == 1)
301# endif 255# endif
302 { 256 {
303 ioctl (fd_tty, I_PUSH, "ptem"); 257 ioctl (fd_tty, I_PUSH, "ptem");
304 ioctl (fd_tty, I_PUSH, "ldterm"); 258 ioctl (fd_tty, I_PUSH, "ldterm");
305 ioctl (fd_tty, I_PUSH, "ttcompat"); 259 ioctl (fd_tty, I_PUSH, "ttcompat");
306 } 260 }
307# endif 261#endif
308 262
263#ifdef TIOCSCTTY
309 ioctl (fd_tty, TIOCSCTTY, NULL); 264 ioctl (fd_tty, TIOCSCTTY, NULL);
265#else
266 fd = open (ttyname (fd_tty), O_RDWR);
267 if (fd >= 0)
268 close (fd);
269#endif
310 270
311 int fd = open ("/dev/tty", O_WRONLY); 271 fd = open ("/dev/tty", O_WRONLY);
312 if (fd < 0) 272 if (fd < 0)
313 return -1; /* fatal */ 273 return -1; /* fatal */
314 274
315 close (fd); 275 close (fd);
316 276
317 return 0; 277 return 0;
318} 278}
319 279
320void 280void
321rxvt_ptytty::close_tty () 281ptytty::close_tty ()
322{ 282{
323 if (tty < 0) 283 if (tty < 0)
324 return; 284 return;
325 285
326 close (tty); 286 close (tty);
327 tty = -1; 287 tty = -1;
328} 288}
329 289
330bool 290bool
331rxvt_ptytty::make_controlling_tty () 291ptytty::make_controlling_tty ()
332{ 292{
333 return control_tty (tty) >= 0; 293 return control_tty (tty) >= 0;
334} 294}
335 295
336void 296void
337rxvt_ptytty::set_utf8_mode (bool on) 297ptytty::set_utf8_mode (bool on)
338{ 298{
339#ifdef IUTF8 299#ifdef IUTF8
340 if (pty < 0) 300 if (pty < 0)
341 return; 301 return;
342 302
… …
358 } 318 }
359 } 319 }
360#endif 320#endif
361} 321}
362 322
363/////////////////////////////////////////////////////////////////////////////
364
365#ifndef NO_SETOWNER_TTYDEV
366static struct ttyconf { 323static struct ttyconf {
367 gid_t gid; 324 gid_t gid;
368 mode_t mode; 325 mode_t mode;
369 326
370 ttyconf () 327 ttyconf ()
371 { 328 {
372#ifdef TTY_GID_SUPPORT 329#ifdef TTY_GID_SUPPORT
373 struct group *gr = getgrnam ("tty"); 330 struct group *gr = getgrnam ("tty");
374 331
375 if (gr) 332 if (gr)
333 {
376 { /* change group ownership of tty to "tty" */ 334 /* change group ownership of tty to "tty" */
377 mode = S_IRUSR | S_IWUSR | S_IWGRP; 335 mode = S_IRUSR | S_IWUSR | S_IWGRP;
378 gid = gr->gr_gid; 336 gid = gr->gr_gid;
379 } 337 }
380 else 338 else
381#endif /* TTY_GID_SUPPORT */ 339#endif /* TTY_GID_SUPPORT */
382 { 340 {
383 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; 341 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
384 gid = getgid (); 342 gid = 0;
385 } 343 }
386 } 344 }
387} ttyconf; 345} ttyconf;
388 346
389///////////////////////////////////////////////////////////////////////////// 347ptytty_unix::ptytty_unix ()
348{
349 name = 0;
350#if UTMP_SUPPORT
351 cmd_pid = 0;
352#endif
353}
354
355ptytty_unix::~ptytty_unix ()
356{
357#if UTMP_SUPPORT
358 logout ();
359#endif
360 put ();
361}
390 362
391void 363void
392rxvt_ptytty_unix::privileges (rxvt_privaction action) 364ptytty_unix::put ()
393{ 365{
394 if (!name || !*name) 366 if (name)
395 return;
396
397 if (action == SAVE)
398 { 367 {
399# ifndef RESET_TTY_TO_COMMON_DEFAULTS 368 chmod (name, RESTORE_TTY_MODE);
400 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
401 if (lstat (name, &savestat) < 0) /* you lose out */
402 ;
403 else
404# endif
405 {
406 saved = true;
407 chown (name, getuid (), ttyconf.gid); /* fail silently */
408 chmod (name, ttyconf.mode); 369 chown (name, 0, ttyconf.gid);
409# ifdef HAVE_REVOKE
410 revoke (name);
411# endif
412 }
413 } 370 }
414 else
415 { /* action == RESTORE */
416# ifndef RESET_TTY_TO_COMMON_DEFAULTS
417 if (saved)
418 {
419 chmod (name, savestat.st_mode);
420 chown (name, savestat.st_uid, savestat.st_gid);
421 }
422# else
423 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
424 chown (name, 0, 0);
425# endif
426 }
427}
428#endif
429 371
430rxvt_ptytty_unix::rxvt_ptytty_unix () 372 close_tty ();
431{ 373
374 if (pty >= 0)
375 close (pty);
376
377 free (name);
378
432 pty = tty = -1; 379 pty = tty = -1;
433 name = 0; 380 name = 0;
434#ifndef NO_SETOWNER_TTYDEV
435 saved = false;
436#endif
437#if UTMP_SUPPORT
438 cmd_pid = 0;
439#endif
440}
441
442rxvt_ptytty_unix::~rxvt_ptytty_unix ()
443{
444#if UTMP_SUPPORT
445 logout ();
446#endif
447 put ();
448}
449
450void
451rxvt_ptytty_unix::put ()
452{
453#ifndef NO_SETOWNER_TTYDEV
454 privileges (RESTORE);
455#endif
456
457 if (pty >= 0) close (pty);
458 close_tty ();
459 free (name);
460
461 pty = tty = -1;
462 name = 0;
463} 381}
464 382
465bool 383bool
466rxvt_ptytty_unix::get () 384ptytty_unix::get ()
467{ 385{
468 /* get master (pty) */ 386 /* get master (pty) */
469 if ((pty = get_pty (&tty, &name)) < 0) 387 if ((pty = get_pty (&tty, &name)) < 0)
470 return false; 388 return false;
471 389
… …
473 391
474 /* get slave (tty) */ 392 /* get slave (tty) */
475 if (tty < 0) 393 if (tty < 0)
476 { 394 {
477#ifndef NO_SETOWNER_TTYDEV 395#ifndef NO_SETOWNER_TTYDEV
478 privileges (SAVE); 396 chown (name, getuid (), ttyconf.gid); /* fail silently */
397 chmod (name, ttyconf.mode);
398# ifdef HAVE_REVOKE
399 revoke (name);
400# endif
479#endif 401#endif
480 402
481 if ((tty = get_tty (name)) < 0) 403 if ((tty = get_tty (name)) < 0)
482 { 404 {
483 put (); 405 put ();
… …
486 } 408 }
487 409
488 return true; 410 return true;
489} 411}
490 412
491#if PTYTTY_HELPER
492
493static int sock_fd;
494static int pid;
495
496struct command
497{
498 enum { get, login, destroy } type;
499
500 rxvt_ptytty *id;
501
502 bool login_shell;
503 int cmd_pid;
504 char hostname[512]; // arbitrary, but should be plenty
505};
506
507struct rxvt_ptytty_proxy : zero_initialized, rxvt_ptytty
508{
509 rxvt_ptytty *id;
510
511 ~rxvt_ptytty_proxy ();
512
513 bool get ();
514 void login (int cmd_pid, bool login_shell, const char *hostname);
515};
516
517bool
518rxvt_ptytty_proxy::get ()
519{
520 command cmd;
521
522 cmd.type = command::get;
523
524 write (sock_fd, &cmd, sizeof (cmd));
525
526 if (read (sock_fd, &id, sizeof (id)) != sizeof (id))
527 rxvt_fatal ("protocol error while creating pty using helper process, aborting.\n");
528
529 if (!id)
530 return false;
531
532 if ((pty = rxvt_recv_fd (sock_fd)) < 0
533 || (tty = rxvt_recv_fd (sock_fd)) < 0)
534 rxvt_fatal ("protocol error while reading pty/tty fds from helper process, aborting.\n");
535
536 return true;
537}
538
539void
540rxvt_ptytty_proxy::login (int cmd_pid, bool login_shell, const char *hostname)
541{
542 command cmd;
543
544 cmd.type = command::login;
545 cmd.id = id;
546 cmd.cmd_pid = cmd_pid;
547 cmd.login_shell = login_shell;
548 strncpy (cmd.hostname, hostname, sizeof (cmd.hostname));
549
550 write (sock_fd, &cmd, sizeof (cmd));
551}
552
553rxvt_ptytty_proxy::~rxvt_ptytty_proxy ()
554{
555 command cmd;
556
557 cmd.type = command::destroy;
558 cmd.id = id;
559
560 write (sock_fd, &cmd, sizeof (cmd));
561}
562
563static
564void serve ()
565{
566 command cmd;
567 vector<rxvt_ptytty *> ptys;
568
569 while (read (sock_fd, &cmd, sizeof (command)) == sizeof (command))
570 {
571 if (cmd.type == command::get)
572 {
573 // -> id ptyfd ttyfd
574 cmd.id = new rxvt_ptytty_unix;
575
576 if (cmd.id->get ())
577 {
578 write (sock_fd, &cmd.id, sizeof (cmd.id));
579 ptys.push_back (cmd.id);
580
581 rxvt_send_fd (sock_fd, cmd.id->pty);
582 rxvt_send_fd (sock_fd, cmd.id->tty);
583 }
584 else
585 {
586 delete cmd.id;
587 cmd.id = 0;
588 write (sock_fd, &cmd.id, sizeof (cmd.id));
589 }
590 }
591 else if (cmd.type == command::login)
592 {
593#if UTMP_SUPPORT
594 if (find (ptys.begin (), ptys.end (), cmd.id))
595 {
596 cmd.hostname[sizeof (cmd.hostname) - 1] = 0;
597 cmd.id->login (cmd.cmd_pid, cmd.login_shell, cmd.hostname);
598 }
599#endif
600 }
601 else if (cmd.type == command::destroy)
602 {
603 rxvt_ptytty **pty = find (ptys.begin (), ptys.end (), cmd.id);
604
605 if (pty)
606 {
607 delete *pty;
608 ptys.erase (pty);
609 }
610 }
611 else
612 break;
613 }
614
615 // destroy all ptys
616 for (rxvt_ptytty **i = ptys.end (); i-- > ptys.begin (); )
617 delete *i;
618}
619
620void rxvt_ptytty_server ()
621{
622 int sv[2];
623
624 if (socketpair (AF_UNIX, SOCK_STREAM, 0, sv))
625 rxvt_fatal ("could not create socket to communicate with pty/sessiondb helper, aborting.\n");
626
627 pid = fork ();
628
629 if (pid < 0)
630 rxvt_fatal ("could not create pty/sessiondb helper process, aborting.\n");
631
632 if (pid)
633 {
634 // client, urxvt
635 sock_fd = sv[0];
636 close (sv[1]);
637 fcntl (sock_fd, F_SETFD, FD_CLOEXEC);
638 }
639 else
640 {
641 // server, pty-helper
642 sock_fd = sv[1];
643
644 for (int fd = 0; fd < 1023; fd++)
645 if (fd != sock_fd)
646 close (fd);
647
648 serve ();
649 _exit (EXIT_SUCCESS);
650 }
651}
652#endif
653
654// a "factory" *g*
655rxvt_ptytty *
656rxvt_new_ptytty ()
657{
658#if PTYTTY_HELPER
659 if (pid > 0)
660 // use helper process
661 return new rxvt_ptytty_proxy;
662 else
663#endif
664 return new rxvt_ptytty_unix;
665}
666
667/*----------------------- end-of-file (C source) -----------------------*/
668

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