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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.43 by root, Tue Jan 17 16:50:42 2006 UTC vs.
Revision 1.70 by sf-exg, Wed Jul 21 08:46:13 2010 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 */
73#if defined(UNIX98_PTY)
74
69static int 75 static int
70get_pty (int *fd_tty, char **ttydev) 76 get_pty (int *fd_tty, char **ttydev)
71{
72 int pfd;
73
74#ifdef PTYS_ARE_OPENPTY
75 char tty_name[sizeof "/dev/pts/????\0"];
76
77 int res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
78
79 if (res != -1)
80 {
81 *ttydev = strdup (tty_name);
82 return pfd;
83 }
84#endif
85
86#ifdef PTYS_ARE__GETPTY
87 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
88 if (*ttydev != NULL)
89 return pfd;
90#endif
91
92#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
93# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_POSIX) || defined(PTYS_ARE_PTMX)
94
95 { 77 {
96# ifdef PTYS_ARE_GETPT 78 int pfd;
79
80# if defined(HAVE_GETPT)
97 pfd = getpt(); 81 pfd = getpt();
98# else 82# elif defined(HAVE_POSIX_OPENPT)
99# ifdef PTYS_ARE_POSIX
100 pfd = posix_openpt (O_RDWR); 83 pfd = posix_openpt (O_RDWR);
101# else 84# else
102 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 85 pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0);
103# endif 86# endif
104# endif
105 87
106 if (pfd >= 0) 88 if (pfd >= 0)
107 { 89 {
108 if (grantpt (pfd) == 0 /* change slave permissions */ 90 if (grantpt (pfd) == 0 /* change slave permissions */
109 && unlockpt (pfd) == 0) 91 && unlockpt (pfd) == 0)
92 {
110 { /* slave now unlocked */ 93 /* slave now unlocked */
111 *ttydev = strdup (ptsname (pfd)); /* get slave's name */ 94 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
112 return pfd; 95 return pfd;
113 } 96 }
97
114 close (pfd); 98 close (pfd);
115 } 99 }
100
101 return -1;
116 } 102 }
117# endif
118#endif
119 103
120#ifdef PTYS_ARE_PTC 104#elif defined(HAVE_OPENPTY)
121 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
122 {
123 *ttydev = strdup (ttyname (pfd));
124 return pfd;
125 }
126#endif
127 105
128#ifdef PTYS_ARE_CLONE 106 static int
129 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 107 get_pty (int *fd_tty, char **ttydev)
130 {
131 *ttydev = strdup (ptsname (pfd));
132 return pfd;
133 }
134#endif
135
136#ifdef PTYS_ARE_NUMERIC
137 { 108 {
138 int idx; 109 int pfd;
139 char *c1, *c2; 110 int res;
140 char pty_name[] = "/dev/ptyp???";
141 char tty_name[] = "/dev/ttyp???";
142 111
143 c1 = &(pty_name[sizeof (pty_name) - 4]); 112 res = openpty (&pfd, fd_tty, NULL, NULL, NULL);
144 c2 = &(tty_name[sizeof (tty_name) - 4]); 113
145 for (idx = 0; idx < 256; idx++) 114 if (res != -1)
146 { 115 {
147 sprintf (c1, "%d", idx); 116 *ttydev = strdup (ttyname (*fd_tty));
148 sprintf (c2, "%d", idx); 117 return pfd;
149 if (access (tty_name, F_OK) < 0) 118 }
119
120 return -1;
121 }
122
123#elif defined(HAVE__GETPTY)
124
125 static int
126 get_pty (int *fd_tty, char **ttydev)
127 {
128 int pfd;
129 char *slave;
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#else
143
144 /* Based on the code in openssh/openbsd-compat/bsd-openpty.c */
145 static int
146 get_pty (int *fd_tty, char **ttydev)
147 {
148 int pfd;
149 int i;
150 char pty_name[32];
151 char tty_name[32];
152 const char *majors = "pqrstuvwxyzabcde";
153 const char *minors = "0123456789abcdef";
154
155 for (i = 0; i < 256; i++)
156 {
157 snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]);
158 snprintf(tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]);
159
160 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
150 { 161 {
151 idx = 256; 162 snprintf(pty_name, 32, "/dev/ptyp%d", i);
152 break; 163 snprintf(tty_name, 32, "/dev/ttyp%d", i);
164 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
165 continue;
153 } 166 }
154 167
155 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 168 if (access (tty_name, R_OK | W_OK) == 0)
156 { 169 {
157 if (access (tty_name, R_OK | W_OK) == 0)
158 {
159 *ttydev = strdup (tty_name); 170 *ttydev = strdup (tty_name);
160 return pfd; 171 return pfd;
161 }
162
163 close (pfd);
164 } 172 }
173
174 close (pfd);
165 } 175 }
176
177 return -1;
166 } 178 }
167#endif
168 179
169#ifdef PTYS_ARE_SEARCHED
170 {
171 const char *c1, *c2;
172 char pty_name[] = "/dev/pty??";
173 char tty_name[] = "/dev/tty??";
174
175# ifndef PTYCHAR1
176# define PTYCHAR1 "pqrstuvwxyz"
177# endif 180#endif
178# ifndef PTYCHAR2
179# define PTYCHAR2 "0123456789abcdef"
180# endif
181
182 for (c1 = PTYCHAR1; *c1; c1++)
183 {
184 pty_name[ (sizeof (pty_name) - 3)] =
185 tty_name[ (sizeof (pty_name) - 3)] = *c1;
186 for (c2 = PTYCHAR2; *c2; c2++)
187 {
188 pty_name[ (sizeof (pty_name) - 2)] =
189 tty_name[ (sizeof (pty_name) - 2)] = *c2;
190 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
191 {
192 if (access (tty_name, R_OK | W_OK) == 0)
193 {
194 *ttydev = strdup (tty_name);
195 return pfd;
196 }
197
198 close (pfd);
199 }
200 }
201 }
202 }
203#endif
204
205 return -1;
206}
207 181
208/*----------------------------------------------------------------------*/ 182/*----------------------------------------------------------------------*/
209/* 183/*
210 * Returns tty file descriptor, or -1 on failure 184 * Returns tty file descriptor, or -1 on failure
211 */ 185 */
212static int 186static int
213get_tty (char *ttydev) 187get_tty (char *ttydev)
214{ 188{
215 return open (ttydev, O_RDWR | O_NOCTTY, 0); 189 return open (ttydev, O_RDWR | O_NOCTTY, 0);
… …
222static int 196static int
223control_tty (int fd_tty) 197control_tty (int fd_tty)
224{ 198{
225 int fd; 199 int fd;
226 200
227 /* ---------------------------------------- */
228 setsid (); 201 setsid ();
229 202
230 /* ---------------------------------------- */
231# if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 203#if defined(HAVE_DEV_PTMX) && defined(I_PUSH)
232 /* 204 /*
233 * Push STREAMS modules: 205 * Push STREAMS modules:
234 * ptem: pseudo-terminal hardware emulation module. 206 * ptem: pseudo-terminal hardware emulation module.
235 * ldterm: standard terminal line discipline. 207 * ldterm: standard terminal line discipline.
236 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 208 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
… …
244 * documentation is really unclear about whether it is any close () on 216 * documentation is really unclear about whether it is any close () on
245 * the master side or the last close () - i.e. a proper STREAMS dismantling 217 * the master side or the last close () - i.e. a proper STREAMS dismantling
246 * close () - on the master side which causes a hang up to be sent 218 * close () - on the master side which causes a hang up to be sent
247 * through - Geoff Wing 219 * through - Geoff Wing
248 */ 220 */
249# ifdef HAVE_ISASTREAM 221#if defined(HAVE_ISASTREAM) && defined(HAVE_STROPTS_H)
250 if (isastream (fd_tty) == 1) 222 if (isastream (fd_tty) == 1)
251# endif 223# endif
252 { 224 {
253 ioctl (fd_tty, I_PUSH, "ptem"); 225 ioctl (fd_tty, I_PUSH, "ptem");
254 ioctl (fd_tty, I_PUSH, "ldterm"); 226 ioctl (fd_tty, I_PUSH, "ldterm");
255 ioctl (fd_tty, I_PUSH, "ttcompat"); 227 ioctl (fd_tty, I_PUSH, "ttcompat");
256 } 228 }
257# endif 229#endif
258 /* ---------------------------------------- */ 230
231#ifdef TIOCSCTTY
259 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 232 ioctl (fd_tty, TIOCSCTTY, NULL);
260 /* ---------------------------------------- */ 233#else
234 fd = open (ttyname (fd_tty), O_RDWR);
235 if (fd >= 0)
236 close (fd);
237#endif
238
261 fd = open ("/dev/tty", O_WRONLY); 239 fd = open ("/dev/tty", O_WRONLY);
262 if (fd < 0) 240 if (fd < 0)
263 return -1; /* fatal */ 241 return -1; /* fatal */
242
264 close (fd); 243 close (fd);
265 /* ---------------------------------------- */
266 244
267 return 0; 245 return 0;
268} 246}
269 247
270void 248void
271rxvt_ptytty::close_tty () 249ptytty::close_tty ()
272{ 250{
273 if (tty < 0) 251 if (tty < 0)
274 return; 252 return;
275 253
276 close (tty); 254 close (tty);
277 tty = -1; 255 tty = -1;
278} 256}
279 257
280bool 258bool
281rxvt_ptytty::make_controlling_tty () 259ptytty::make_controlling_tty ()
282{ 260{
283 return control_tty (tty) >= 0; 261 return control_tty (tty) >= 0;
284} 262}
285 263
286void 264void
287rxvt_ptytty::set_utf8_mode (bool on) 265ptytty::set_utf8_mode (bool on)
288{ 266{
289#ifdef IUTF8 267#ifdef IUTF8
290 if (pty < 0) 268 if (pty < 0)
291 return; 269 return;
292 270
… …
308 } 286 }
309 } 287 }
310#endif 288#endif
311} 289}
312 290
313/////////////////////////////////////////////////////////////////////////////
314
315#ifndef NO_SETOWNER_TTYDEV
316static struct ttyconf { 291static struct ttyconf {
317 gid_t gid; 292 gid_t gid;
318 mode_t mode; 293 mode_t mode;
319 294
320 ttyconf () 295 ttyconf ()
321 { 296 {
322#ifdef TTY_GID_SUPPORT 297#ifdef TTY_GID_SUPPORT
323 struct group *gr = getgrnam ("tty"); 298 struct group *gr = getgrnam ("tty");
324 299
325 if (gr) 300 if (gr)
301 {
326 { /* change group ownership of tty to "tty" */ 302 /* change group ownership of tty to "tty" */
327 mode = S_IRUSR | S_IWUSR | S_IWGRP; 303 mode = S_IRUSR | S_IWUSR | S_IWGRP;
328 gid = gr->gr_gid; 304 gid = gr->gr_gid;
329 } 305 }
330 else 306 else
331#endif /* TTY_GID_SUPPORT */ 307#endif /* TTY_GID_SUPPORT */
332 { 308 {
333 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; 309 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
334 gid = getgid (); 310 gid = 0;
335 } 311 }
336 } 312 }
337} ttyconf; 313} ttyconf;
338 314
339///////////////////////////////////////////////////////////////////////////// 315ptytty_unix::ptytty_unix ()
316{
317 name = 0;
318#if UTMP_SUPPORT
319 cmd_pid = 0;
320#endif
321}
322
323ptytty_unix::~ptytty_unix ()
324{
325#if UTMP_SUPPORT
326 logout ();
327#endif
328 put ();
329}
340 330
341void 331void
342rxvt_ptytty_unix::privileges (rxvt_privaction action) 332ptytty_unix::put ()
343{ 333{
344 if (!name || !*name) 334 if (name)
345 return;
346
347 if (action == SAVE)
348 {
349# ifndef RESET_TTY_TO_COMMON_DEFAULTS
350 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
351 if (lstat (name, &savestat) < 0) /* you lose out */
352 ;
353 else
354# endif
355 {
356 saved = true;
357 chown (name, getuid (), ttyconf.gid); /* fail silently */
358 chmod (name, ttyconf.mode);
359# ifdef HAVE_REVOKE
360 revoke (name);
361# endif
362 }
363 } 335 {
364 else 336 chmod (name, RESTORE_TTY_MODE);
365 { /* action == RESTORE */
366# ifndef RESET_TTY_TO_COMMON_DEFAULTS
367 if (saved)
368 {
369 chmod (name, savestat.st_mode);
370 chown (name, savestat.st_uid, savestat.st_gid);
371 }
372# else
373 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
374 chown (name, 0, 0); 337 chown (name, 0, ttyconf.gid);
375# endif
376
377 } 338 }
378}
379#endif
380 339
381rxvt_ptytty_unix::rxvt_ptytty_unix () 340 close_tty ();
382{ 341
342 if (pty >= 0)
343 close (pty);
344
345 free (name);
346
383 pty = tty = -1; 347 pty = tty = -1;
384 name = 0; 348 name = 0;
385#ifndef NO_SETOWNER_TTYDEV
386 saved = false;
387#endif
388#if UTMP_SUPPORT
389 cmd_pid = 0;
390#endif
391}
392
393rxvt_ptytty_unix::~rxvt_ptytty_unix ()
394{
395#if UTMP_SUPPORT
396 logout ();
397#endif
398 put ();
399}
400
401void
402rxvt_ptytty_unix::put ()
403{
404#ifndef NO_SETOWNER_TTYDEV
405 privileges (RESTORE);
406#endif
407
408 if (pty >= 0) close (pty);
409 close_tty ();
410 free (name);
411
412 pty = tty = -1;
413 name = 0;
414} 349}
415 350
416bool 351bool
417rxvt_ptytty_unix::get () 352ptytty_unix::get ()
418{ 353{
419 /* get master (pty) */ 354 /* get master (pty) */
420 if ((pty = get_pty (&tty, &name)) < 0) 355 if ((pty = get_pty (&tty, &name)) < 0)
421 return false; 356 return false;
422 357
… …
424 359
425 /* get slave (tty) */ 360 /* get slave (tty) */
426 if (tty < 0) 361 if (tty < 0)
427 { 362 {
428#ifndef NO_SETOWNER_TTYDEV 363#ifndef NO_SETOWNER_TTYDEV
429 privileges (SAVE); 364 chown (name, getuid (), ttyconf.gid); /* fail silently */
365 chmod (name, ttyconf.mode);
366# ifdef HAVE_REVOKE
367 revoke (name);
368# endif
430#endif 369#endif
431 370
432 if ((tty = get_tty (name)) < 0) 371 if ((tty = get_tty (name)) < 0)
433 { 372 {
434 put (); 373 put ();
… …
437 } 376 }
438 377
439 return true; 378 return true;
440} 379}
441 380
442#if PTYTTY_HELPER
443
444static int sock_fd;
445static int pid;
446
447struct command
448{
449 enum { get, login, destroy } type;
450
451 rxvt_ptytty *id;
452
453 bool login_shell;
454 int cmd_pid;
455 char hostname[512]; // arbitrary, but should be plenty
456};
457
458struct rxvt_ptytty_proxy : zero_initialized, rxvt_ptytty
459{
460 rxvt_ptytty *id;
461
462 ~rxvt_ptytty_proxy ();
463
464 bool get ();
465 void login (int cmd_pid, bool login_shell, const char *hostname);
466};
467
468bool
469rxvt_ptytty_proxy::get ()
470{
471 command cmd;
472
473 cmd.type = command::get;
474
475 write (sock_fd, &cmd, sizeof (cmd));
476
477 if (read (sock_fd, &id, sizeof (id)) != sizeof (id))
478 rxvt_fatal ("protocol error while creating pty using helper process, aborting.\n");
479
480 if (!id)
481 return false;
482
483 if ((pty = rxvt_recv_fd (sock_fd)) < 0
484 || (tty = rxvt_recv_fd (sock_fd)) < 0)
485 rxvt_fatal ("protocol error while reading pty/tty fds from helper process, aborting.\n");
486
487 return true;
488}
489
490void
491rxvt_ptytty_proxy::login (int cmd_pid, bool login_shell, const char *hostname)
492{
493 command cmd;
494
495 cmd.type = command::login;
496 cmd.id = id;
497 cmd.cmd_pid = cmd_pid;
498 cmd.login_shell = login_shell;
499 strncpy (cmd.hostname, hostname, sizeof (cmd.hostname));
500
501 write (sock_fd, &cmd, sizeof (cmd));
502}
503
504rxvt_ptytty_proxy::~rxvt_ptytty_proxy ()
505{
506 command cmd;
507
508 cmd.type = command::destroy;
509 cmd.id = id;
510
511 write (sock_fd, &cmd, sizeof (cmd));
512}
513
514static
515void serve ()
516{
517 command cmd;
518 vector<rxvt_ptytty *> ptys;
519
520 while (read (sock_fd, &cmd, sizeof (command)) == sizeof (command))
521 {
522 if (cmd.type == command::get)
523 {
524 // -> id ptyfd ttyfd
525 cmd.id = new rxvt_ptytty_unix;
526
527 if (cmd.id->get ())
528 {
529 write (sock_fd, &cmd.id, sizeof (cmd.id));
530 ptys.push_back (cmd.id);
531
532 rxvt_send_fd (sock_fd, cmd.id->pty);
533 rxvt_send_fd (sock_fd, cmd.id->tty);
534 }
535 else
536 {
537 delete cmd.id;
538 cmd.id = 0;
539 write (sock_fd, &cmd.id, sizeof (cmd.id));
540 }
541 }
542 else if (cmd.type == command::login)
543 {
544#if UTMP_SUPPORT
545 if (find (ptys.begin (), ptys.end (), cmd.id))
546 {
547 cmd.hostname[sizeof (cmd.hostname) - 1] = 0;
548 cmd.id->login (cmd.cmd_pid, cmd.login_shell, cmd.hostname);
549 }
550#endif
551 }
552 else if (cmd.type == command::destroy)
553 {
554 rxvt_ptytty **pty = find (ptys.begin (), ptys.end (), cmd.id);
555
556 if (pty)
557 {
558 delete *pty;
559 ptys.erase (pty);
560 }
561 }
562 else
563 break;
564 }
565
566 // destroy all ptys
567 for (rxvt_ptytty **i = ptys.end (); i-- > ptys.begin (); )
568 delete *i;
569}
570
571void rxvt_ptytty_server ()
572{
573 int sv[2];
574
575 if (socketpair (AF_UNIX, SOCK_STREAM, 0, sv))
576 rxvt_fatal ("could not create socket to communicate with pty/sessiondb helper, aborting.\n");
577
578 pid = fork ();
579
580 if (pid < 0)
581 rxvt_fatal ("could not create pty/sessiondb helper process, aborting.\n");
582
583 if (pid)
584 {
585 // client, urxvt
586 sock_fd = sv[0];
587 close (sv[1]);
588 fcntl (sock_fd, F_SETFD, FD_CLOEXEC);
589 }
590 else
591 {
592 setgid (getegid ());
593 setuid (geteuid ());
594
595 // server, pty-helper
596 sock_fd = sv[1];
597
598 for (int fd = 0; fd < 1023; fd++)
599 if (fd != sock_fd && fd != 1)
600 close (fd);
601
602 serve ();
603 _exit (EXIT_SUCCESS);
604 }
605}
606#endif
607
608// a "factory" *g*
609rxvt_ptytty *
610rxvt_new_ptytty ()
611{
612#if PTYTTY_HELPER
613 if (pid > 0)
614 // use helper process
615 return new rxvt_ptytty_proxy;
616 else
617#endif
618 return new rxvt_ptytty_unix;
619}
620
621/*----------------------- end-of-file (C source) -----------------------*/
622

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