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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.41 by root, Tue Jan 17 15:41:33 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 */
72#if defined(UNIX98_PTY)
73
69static int 74 static int
70get_pty (int *fd_tty, char **ttydev) 75 get_pty (int *fd_tty, char **ttydev)
71{ 76 {
72 int pfd; 77 int pfd;
73 78
74#ifdef PTYS_ARE_OPENPTY 79# if defined(HAVE_GETPT)
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 {
96# ifdef PTYS_ARE_GETPT
97 pfd = getpt(); 80 pfd = getpt();
98# else 81# elif defined(HAVE_POSIX_OPENPT)
99# ifdef PTYS_ARE_POSIX
100 pfd = posix_openpt (O_RDWR); 82 pfd = posix_openpt (O_RDWR);
101# else 83# else
102 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 84 pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0);
103# endif 85# endif
104# endif
105 86
106 if (pfd >= 0) 87 if (pfd >= 0)
107 { 88 {
108 if (grantpt (pfd) == 0 /* change slave permissions */ 89 if (grantpt (pfd) == 0 /* change slave permissions */
109 && unlockpt (pfd) == 0) 90 && unlockpt (pfd) == 0)
110 { /* slave now unlocked */ 91 { /* slave now unlocked */
111 *ttydev = strdup (ptsname (pfd)); /* get slave's name */ 92 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
112 return pfd; 93 return pfd;
113 } 94 }
95
114 close (pfd); 96 close (pfd);
115 } 97 }
116 }
117# endif
118#endif
119 98
120#ifdef PTYS_ARE_PTC 99 return -1;
121 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) 100 }
101
102#elif defined(HAVE_OPENPTY)
103
104 static int
105 get_pty (int *fd_tty, char **ttydev)
106 {
107 int pfd;
108 int res;
109 char tty_name[32];
122 { 110
111 res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
112
113 if (res != -1)
114 {
123 *ttydev = strdup (ttyname (pfd)); 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)
124 return pfd; 132 return pfd;
133
134 return -1;
135 }
136
137#elif defined(HAVE_DEV_PTC)
138
139 static int
140 get_pty (int *fd_tty, char **ttydev)
141 {
142 int pfd;
143
144 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
145 {
146 *ttydev = strdup (ttyname (pfd));
147 return pfd;
125 } 148 }
126#endif
127 149
128#ifdef PTYS_ARE_CLONE 150 return -1;
151 }
152
153#elif defined(HAVE_DEV_CLONE)
154
155 static int
156 get_pty (int *fd_tty, char **ttydev)
157 {
158 int pfd;
159
129 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)
130 { 161 {
131 *ttydev = strdup (ptsname (pfd)); 162 *ttydev = strdup (ptsname (pfd));
132 return pfd; 163 return pfd;
133 } 164 }
134#endif
135 165
136#ifdef PTYS_ARE_NUMERIC 166 return -1;
167 }
168
169#else
170
171 /* Based on the code in openssh/openbsd-compat/bsd-openpty.c */
172 static int
173 get_pty (int *fd_tty, char **ttydev)
137 { 174 {
175 int pfd;
138 int idx; 176 int i;
139 char *c1, *c2; 177 char pty_name[32];
140 char pty_name[] = "/dev/ptyp???"; 178 char tty_name[32];
141 char tty_name[] = "/dev/ttyp???"; 179 const char *majors = "pqrstuvwxyzabcde";
180 const char *minors = "0123456789abcdef";
142 181
143 c1 = &(pty_name[sizeof (pty_name) - 4]);
144 c2 = &(tty_name[sizeof (tty_name) - 4]);
145 for (idx = 0; idx < 256; idx++) 182 for (i = 0; i < 256; i++)
146 { 183 {
147 sprintf (c1, "%d", idx); 184 snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]);
148 sprintf (c2, "%d", idx); 185 snprintf(tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]);
149 if (access (tty_name, F_OK) < 0) 186
187 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
150 { 188 {
151 idx = 256; 189 snprintf(pty_name, 32, "/dev/ptyp%d", i);
152 break; 190 snprintf(tty_name, 32, "/dev/ttyp%d", i);
191 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
192 continue;
153 } 193 }
154 194
155 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 195 if (access (tty_name, R_OK | W_OK) == 0)
156 { 196 {
157 if (access (tty_name, R_OK | W_OK) == 0)
158 {
159 *ttydev = strdup (tty_name); 197 *ttydev = strdup (tty_name);
160 return pfd; 198 return pfd;
161 }
162
163 close (pfd);
164 } 199 }
165 }
166 }
167#endif
168 200
169#ifdef PTYS_ARE_SEARCHED 201 close (pfd);
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
178# ifndef PTYCHAR2
179# define PTYCHAR2 "0123456789abcdef"
180# endif
181
182 for (c1 = PTYCHAR1; *c1; c1++)
183 { 202 }
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 }
197 203
198 close (pfd);
199 }
200 }
201 }
202 }
203#endif
204
205 return -1; 204 return -1;
206} 205 }
206
207#endif
207 208
208/*----------------------------------------------------------------------*/ 209/*----------------------------------------------------------------------*/
209/* 210/*
210 * Returns tty file descriptor, or -1 on failure 211 * Returns tty file descriptor, or -1 on failure
211 */ 212 */
… …
220 * Make our tty a controlling tty so that /dev/tty points to us 221 * Make our tty a controlling tty so that /dev/tty points to us
221 */ 222 */
222static int 223static int
223control_tty (int fd_tty) 224control_tty (int fd_tty)
224{ 225{
225 int fd;
226
227 /* ---------------------------------------- */
228 setsid (); 226 setsid ();
229 227
230 /* ---------------------------------------- */
231# if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 228#if defined(HAVE_DEV_PTMX) && defined(I_PUSH)
232 /* 229 /*
233 * Push STREAMS modules: 230 * Push STREAMS modules:
234 * ptem: pseudo-terminal hardware emulation module. 231 * ptem: pseudo-terminal hardware emulation module.
235 * ldterm: standard terminal line discipline. 232 * ldterm: standard terminal line discipline.
236 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 233 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
… …
244 * documentation is really unclear about whether it is any close () on 241 * 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 242 * 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 243 * close () - on the master side which causes a hang up to be sent
247 * through - Geoff Wing 244 * through - Geoff Wing
248 */ 245 */
249# ifdef HAVE_ISASTREAM 246# ifdef HAVE_ISASTREAM
250 if (isastream (fd_tty) == 1) 247 if (isastream (fd_tty) == 1)
251# endif 248# endif
252 { 249 {
253 ioctl (fd_tty, I_PUSH, "ptem"); 250 ioctl (fd_tty, I_PUSH, "ptem");
254 ioctl (fd_tty, I_PUSH, "ldterm"); 251 ioctl (fd_tty, I_PUSH, "ldterm");
255 ioctl (fd_tty, I_PUSH, "ttcompat"); 252 ioctl (fd_tty, I_PUSH, "ttcompat");
256 } 253 }
257# endif 254#endif
258 /* ---------------------------------------- */ 255
259 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 256 ioctl (fd_tty, TIOCSCTTY, NULL);
260 /* ---------------------------------------- */ 257
261 fd = open ("/dev/tty", O_WRONLY); 258 int fd = open ("/dev/tty", O_WRONLY);
262 if (fd < 0) 259 if (fd < 0)
263 return -1; /* fatal */ 260 return -1; /* fatal */
261
264 close (fd); 262 close (fd);
265 /* ---------------------------------------- */
266 263
267 return 0; 264 return 0;
268} 265}
269 266
270void 267void
271rxvt_ptytty::close_tty () 268ptytty::close_tty ()
272{ 269{
273 if (tty < 0) 270 if (tty < 0)
274 return; 271 return;
275 272
276 close (tty); 273 close (tty);
277 tty = -1; 274 tty = -1;
278} 275}
279 276
280bool 277bool
281rxvt_ptytty::make_controlling_tty () 278ptytty::make_controlling_tty ()
282{ 279{
283 return control_tty (tty) >= 0; 280 return control_tty (tty) >= 0;
284} 281}
285 282
286void 283void
287rxvt_ptytty::set_utf8_mode (bool on) 284ptytty::set_utf8_mode (bool on)
288{ 285{
289#ifdef IUTF8 286#ifdef IUTF8
290 if (pty < 0) 287 if (pty < 0)
291 return; 288 return;
292 289
… …
308 } 305 }
309 } 306 }
310#endif 307#endif
311} 308}
312 309
313/////////////////////////////////////////////////////////////////////////////
314
315#ifndef NO_SETOWNER_TTYDEV
316static struct ttyconf { 310static struct ttyconf {
317 gid_t gid; 311 gid_t gid;
318 mode_t mode; 312 mode_t mode;
319 313
320 ttyconf () 314 ttyconf ()
… …
329 } 323 }
330 else 324 else
331#endif /* TTY_GID_SUPPORT */ 325#endif /* TTY_GID_SUPPORT */
332 { 326 {
333 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; 327 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
334 gid = getgid (); 328 gid = 0;
335 } 329 }
336 } 330 }
337} ttyconf; 331} ttyconf;
338 332
339///////////////////////////////////////////////////////////////////////////// 333ptytty_unix::ptytty_unix ()
334{
335 name = 0;
336#if UTMP_SUPPORT
337 cmd_pid = 0;
338#endif
339}
340
341ptytty_unix::~ptytty_unix ()
342{
343#if UTMP_SUPPORT
344 logout ();
345#endif
346 put ();
347}
340 348
341void 349void
342rxvt_ptytty_unix::privileges (rxvt_privaction action) 350ptytty_unix::put ()
343{ 351{
344 if (!name || !*name) 352 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 } 353 {
364 else 354 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); 355 chown (name, 0, ttyconf.gid);
375# endif
376
377 } 356 }
378}
379#endif
380 357
381rxvt_ptytty_unix::rxvt_ptytty_unix () 358 close_tty ();
382{ 359
360 if (pty >= 0)
361 close (pty);
362
363 free (name);
364
383 pty = tty = -1; 365 pty = tty = -1;
384 name = 0; 366 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 logout ();
396 put ();
397}
398
399void
400rxvt_ptytty_unix::put ()
401{
402#ifndef NO_SETOWNER_TTYDEV
403 privileges (RESTORE);
404#endif
405
406 if (pty >= 0) close (pty);
407 close_tty ();
408 free (name);
409
410 pty = tty = -1;
411 name = 0;
412} 367}
413 368
414bool 369bool
415rxvt_ptytty_unix::get () 370ptytty_unix::get ()
416{ 371{
417 /* get master (pty) */ 372 /* get master (pty) */
418 if ((pty = get_pty (&tty, &name)) < 0) 373 if ((pty = get_pty (&tty, &name)) < 0)
419 return false; 374 return false;
420 375
… …
422 377
423 /* get slave (tty) */ 378 /* get slave (tty) */
424 if (tty < 0) 379 if (tty < 0)
425 { 380 {
426#ifndef NO_SETOWNER_TTYDEV 381#ifndef NO_SETOWNER_TTYDEV
427 privileges (SAVE); 382 chown (name, getuid (), ttyconf.gid); /* fail silently */
383 chmod (name, ttyconf.mode);
384# ifdef HAVE_REVOKE
385 revoke (name);
386# endif
428#endif 387#endif
429 388
430 if ((tty = get_tty (name)) < 0) 389 if ((tty = get_tty (name)) < 0)
431 { 390 {
432 put (); 391 put ();
… …
435 } 394 }
436 395
437 return true; 396 return true;
438} 397}
439 398
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
488void
489rxvt_ptytty_proxy::login (int cmd_pid, bool login_shell, const char *hostname)
490{
491 command cmd;
492
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));
498
499 write (sock_fd, &cmd, sizeof (cmd));
500}
501
502rxvt_ptytty_proxy::~rxvt_ptytty_proxy ()
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 ptys.erase (pty);
555 delete *pty;
556 }
557 }
558 else
559 break;
560 }
561
562 // destroy all ptys
563 for (rxvt_ptytty **i = ptys.end (); i-- > ptys.begin (); )
564 delete *i;
565}
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)
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)
596 close (fd);
597
598 serve ();
599 _exit (EXIT_SUCCESS);
600 }
601}
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;
615}
616
617/*----------------------- end-of-file (C source) -----------------------*/
618

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