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Revision 1.2 by root, Sat Jan 21 22:01:36 2006 UTC vs.
Revision 1.41 by sf-exg, Fri Nov 11 15:11:18 2011 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 <schmorp@schmorp.de>
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
30#include "ptytty.h"
25 31
26#include <cstdlib> 32#include <cstdlib>
27#include <cstring> 33#include <cstring>
34#include <csignal>
28 35
29#include <sys/types.h> 36#include <sys/types.h>
30#include <sys/socket.h> 37#include <sys/stat.h>
31#include <unistd.h> 38#include <unistd.h>
32#include <fcntl.h> 39#include <fcntl.h>
33 40
34#ifdef HAVE_SYS_IOCTL_H 41#ifdef HAVE_SYS_IOCTL_H
35# include <sys/ioctl.h> 42# include <sys/ioctl.h>
36#endif 43#endif
37#if defined(HAVE_DEV_PTMX) && defined(HAVE_SYS_STROPTS_H) 44#if defined(HAVE_SYS_STROPTS_H)
38# include <sys/stropts.h> /* for I_PUSH */ 45# include <sys/stropts.h> /* for I_PUSH */
39#endif 46#endif
40#ifdef HAVE_ISASTREAM 47#if defined(HAVE_ISASTREAM) && defined(HAVE_STROPTS_H)
41# include <stropts.h> 48# include <stropts.h>
42#endif 49#endif
43#if defined(HAVE_PTY_H) 50#if defined(HAVE_PTY_H)
44# include <pty.h> 51# include <pty.h>
45#elif defined(HAVE_LIBUTIL_H) 52#elif defined(HAVE_LIBUTIL_H)
… …
51#include <grp.h> 58#include <grp.h>
52#endif 59#endif
53 60
54#include <cstdio> 61#include <cstdio>
55 62
56#include "rxvtutil.h"
57#include "fdpass.h"
58#include "ptytty.h"
59
60///////////////////////////////////////////////////////////////////////////// 63/////////////////////////////////////////////////////////////////////////////
61 64
62/* ------------------------------------------------------------------------- * 65/* ------------------------------------------------------------------------- *
63 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 66 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
64 * ------------------------------------------------------------------------- */ 67 * ------------------------------------------------------------------------- */
65/* 68/*
66 * Returns pty file descriptor, or -1 on failure 69 * Returns pty file descriptor, or -1 on failure
67 * 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.
68 * 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
69 */ 72 */
70#if defined(UNIX98_PTY) 73#if defined(UNIX98_PTY)
74
71static int 75 static int
72get_pty (int *fd_tty, char **ttydev) 76 get_pty (int *fd_tty, char **ttydev)
73{ 77 {
74 int pfd; 78 int pfd;
75 79
76# if defined(HAVE_GETPT) 80# if defined(HAVE_GETPT)
77 pfd = getpt(); 81 pfd = getpt();
78# elif defined(HAVE_POSIX_OPENPT) 82# elif defined(HAVE_POSIX_OPENPT)
79 pfd = posix_openpt (O_RDWR); 83 pfd = posix_openpt (O_RDWR | O_NOCTTY);
80# else 84# else
85# ifdef _AIX
81 pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0); 86 pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0);
87# else
88 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
89# endif
82# endif 90# endif
91
83 if (pfd >= 0) 92 if (pfd >= 0)
84 { 93 {
85 if (grantpt (pfd) == 0 /* change slave permissions */ 94 if (grantpt (pfd) == 0 /* change slave permissions */
86 && unlockpt (pfd) == 0) 95 && unlockpt (pfd) == 0)
96 {
87 { /* slave now unlocked */ 97 /* slave now unlocked */
88 *ttydev = strdup (ptsname (pfd)); /* get slave's name */ 98 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
89 return pfd; 99 return pfd;
90 } 100 }
91 101
92 close (pfd); 102 close (pfd);
93 } 103 }
94 104
95 return -1; 105 return -1;
96} 106 }
107
97#elif defined(HAVE_OPENPTY) 108#elif defined(HAVE_OPENPTY)
109
98static int 110 static int
99get_pty (int *fd_tty, char **ttydev) 111 get_pty (int *fd_tty, char **ttydev)
100{ 112 {
101 int pfd; 113 int pfd;
102 int res; 114 int res;
103 char tty_name[32]; 115
104
105 res = openpty (&pfd, fd_tty, tty_name, NULL, NULL); 116 res = openpty (&pfd, fd_tty, NULL, NULL, NULL);
117
106 if (res != -1) 118 if (res != -1)
107 { 119 {
108 *ttydev = strdup (tty_name); 120 *ttydev = strdup (ttyname (*fd_tty));
109 return pfd; 121 return pfd;
110 } 122 }
111 123
112 return -1; 124 return -1;
113} 125 }
126
114#elif defined(HAVE__GETPTY) 127#elif defined(HAVE__GETPTY)
128
115static int 129 static int
116get_pty (int *fd_tty, char **ttydev) 130 get_pty (int *fd_tty, char **ttydev)
117{ 131 {
118 int pfd; 132 int pfd;
133 char *slave;
119 134
120 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); 135 slave = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
121 if (*ttydev != NULL)
122 return pfd;
123 136
124 return -1; 137 if (slave != NULL)
125}
126#elif defined(HAVE_DEV_PTC)
127static int
128get_pty (int *fd_tty, char **ttydev)
129{
130 int pfd;
131
132 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
133 { 138 {
134 *ttydev = strdup (ttyname (pfd)); 139 *ttydev = strdup (slave);
135 return pfd; 140 return pfd;
136 } 141 }
137 142
138 return -1; 143 return -1;
139}
140#elif defined(HAVE_DEV_CLONE)
141static int
142get_pty (int *fd_tty, char **ttydev)
143{
144 int pfd;
145
146 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
147 {
148 *ttydev = strdup (ptsname (pfd));
149 return pfd;
150 } 144 }
151 145
152 return -1;
153}
154#else 146#else
147
155/* Based on the code in openssh/openbsd-compat/bsd-openpty.c */ 148 /* Based on the code in openssh/openbsd-compat/bsd-openpty.c */
156static int 149 static int
157get_pty (int *fd_tty, char **ttydev) 150 get_pty (int *fd_tty, char **ttydev)
158{ 151 {
159 int pfd; 152 int pfd;
160 int i; 153 int i;
161 char pty_name[32]; 154 char pty_name[32];
162 char tty_name[32]; 155 char tty_name[32];
163 const char *majors = "pqrstuvwxyzabcde"; 156 const char *majors = "pqrstuvwxyzabcde";
164 const char *minors = "0123456789abcdef"; 157 const char *minors = "0123456789abcdef";
158
165 for (i = 0; i < 256; i++) 159 for (i = 0; i < 256; i++)
166 { 160 {
167 snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]); 161 snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]);
168 snprintf(tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]); 162 snprintf(tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]);
163
169 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1) 164 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
170 { 165 {
171 snprintf(pty_name, 32, "/dev/ptyp%d", i); 166 snprintf(pty_name, 32, "/dev/ptyp%d", i);
172 snprintf(tty_name, 32, "/dev/ttyp%d", i); 167 snprintf(tty_name, 32, "/dev/ttyp%d", i);
173 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1) 168 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
174 continue; 169 continue;
175 } 170 }
171
176 if (access (tty_name, R_OK | W_OK) == 0) 172 if (access (tty_name, R_OK | W_OK) == 0)
177 { 173 {
178 *ttydev = strdup (tty_name); 174 *ttydev = strdup (tty_name);
179 return pfd; 175 return pfd;
180 } 176 }
181 177
182 close (pfd); 178 close (pfd);
183 } 179 }
184} 180
181 return -1;
182 }
183
185#endif 184#endif
186 185
187/*----------------------------------------------------------------------*/ 186/*----------------------------------------------------------------------*/
188/* 187/*
189 * Returns tty file descriptor, or -1 on failure 188 * Returns tty file descriptor, or -1 on failure
190 */ 189 */
191static int 190static int
192get_tty (char *ttydev) 191get_tty (char *ttydev)
193{ 192{
194 return open (ttydev, O_RDWR | O_NOCTTY, 0); 193 return open (ttydev, O_RDWR | O_NOCTTY, 0);
… …
199 * Make our tty a controlling tty so that /dev/tty points to us 198 * Make our tty a controlling tty so that /dev/tty points to us
200 */ 199 */
201static int 200static int
202control_tty (int fd_tty) 201control_tty (int fd_tty)
203{ 202{
203 int fd;
204
204 setsid (); 205 setsid ();
205 206
206#if defined(HAVE_DEV_PTMX) && defined(I_PUSH) 207#ifdef TIOCSCTTY
208 ioctl (fd_tty, TIOCSCTTY, NULL);
209#else
210 fd = open (ttyname (fd_tty), O_RDWR);
211 if (fd >= 0)
212 close (fd);
213#endif
214
215 fd = open ("/dev/tty", O_WRONLY);
216 if (fd < 0)
217 return -1; /* fatal */
218
219 close (fd);
220
221 return 0;
222}
223
224void
225ptytty::close_tty ()
226{
227 if (tty < 0)
228 return;
229
230 close (tty);
231 tty = -1;
232}
233
234bool
235ptytty::make_controlling_tty ()
236{
237 return control_tty (tty) >= 0;
238}
239
240void
241ptytty::set_utf8_mode (bool on)
242{
243#ifdef IUTF8
244 if (pty < 0)
245 return;
246
247 struct termios tio;
248
249 if (tcgetattr (pty, &tio) != -1)
250 {
251 tcflag_t new_cflag = tio.c_iflag;
252
253 if (on)
254 new_cflag |= IUTF8;
255 else
256 new_cflag &= ~IUTF8;
257
258 if (new_cflag != tio.c_iflag)
259 {
260 tio.c_iflag = new_cflag;
261 tcsetattr (pty, TCSANOW, &tio);
262 }
263 }
264#endif
265}
266
267static struct ttyconf {
268 gid_t gid;
269 mode_t mode;
270
271 ttyconf ()
272 {
273#ifdef TTY_GID_SUPPORT
274 struct group *gr = getgrnam ("tty");
275
276 if (gr)
277 {
278 /* change group ownership of tty to "tty" */
279 mode = S_IRUSR | S_IWUSR | S_IWGRP;
280 gid = gr->gr_gid;
281 }
282 else
283#endif /* TTY_GID_SUPPORT */
284 {
285 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
286 gid = 0;
287 }
288 }
289} ttyconf;
290
291ptytty_unix::ptytty_unix ()
292{
293 name = 0;
294#if UTMP_SUPPORT
295 cmd_pid = 0;
296#endif
297}
298
299ptytty_unix::~ptytty_unix ()
300{
301#if UTMP_SUPPORT
302 logout ();
303#endif
304 put ();
305}
306
307void
308ptytty_unix::put ()
309{
310 if (name)
311 {
312 chmod (name, RESTORE_TTY_MODE);
313 chown (name, 0, ttyconf.gid);
314 }
315
316 close_tty ();
317
318 if (pty >= 0)
319 close (pty);
320
321 free (name);
322
323 pty = tty = -1;
324 name = 0;
325}
326
327bool
328ptytty_unix::get ()
329{
330 /* get master (pty) */
331 if ((pty = get_pty (&tty, &name)) < 0)
332 return false;
333
334 fcntl (pty, F_SETFL, O_NONBLOCK);
335
336 /* get slave (tty) */
337 if (tty < 0)
338 {
339#ifndef NO_SETOWNER_TTYDEV
340 chown (name, getuid (), ttyconf.gid); /* fail silently */
341 chmod (name, ttyconf.mode);
342# ifdef HAVE_REVOKE
343 revoke (name);
344# endif
345#endif
346
347 if ((tty = get_tty (name)) < 0)
348 {
349 put ();
350 return false;
351 }
352 }
353
354#if defined(I_PUSH)
207 /* 355 /*
208 * Push STREAMS modules: 356 * Push STREAMS modules:
209 * ptem: pseudo-terminal hardware emulation module. 357 * ptem: pseudo-terminal hardware emulation module.
210 * ldterm: standard terminal line discipline. 358 * ldterm: standard terminal line discipline.
211 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 359 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
212 * 360 *
213 * After we push the STREAMS modules, the first open () on the slave side 361 * After we push the STREAMS modules, the first open () on the slave side
214 * (i.e. the next section between the dashes giving us "tty opened OK")
215 * should make the "ptem" (or "ldterm" depending upon either which OS 362 * should make the "ptem" (or "ldterm" depending upon either which OS
216 * version or which set of manual pages you have) module give us a 363 * version or which set of manual pages you have) module give us a
217 * controlling terminal. We must already have close ()d the master side 364 * controlling terminal. We must already have close ()d the master side
218 * fd in this child process before we push STREAMS modules on because the 365 * fd in this child process before we push STREAMS modules on because the
219 * documentation is really unclear about whether it is any close () on 366 * documentation is really unclear about whether it is any close () on
220 * the master side or the last close () - i.e. a proper STREAMS dismantling 367 * the master side or the last close () - i.e. a proper STREAMS dismantling
221 * close () - on the master side which causes a hang up to be sent 368 * close () - on the master side which causes a hang up to be sent
222 * through - Geoff Wing 369 * through - Geoff Wing
223 */ 370 */
224# ifdef HAVE_ISASTREAM 371#if defined(HAVE_ISASTREAM) && defined(HAVE_STROPTS_H)
225 if (isastream (fd_tty) == 1) 372 if (isastream (tty) == 1)
226# endif 373# endif
227 { 374 {
228 ioctl (fd_tty, I_PUSH, "ptem"); 375 ioctl (tty, I_PUSH, "ptem");
229 ioctl (fd_tty, I_PUSH, "ldterm"); 376 ioctl (tty, I_PUSH, "ldterm");
230 ioctl (fd_tty, I_PUSH, "ttcompat"); 377 ioctl (tty, I_PUSH, "ttcompat");
231 }
232#endif
233
234 ioctl (fd_tty, TIOCSCTTY, NULL);
235
236 int fd = open ("/dev/tty", O_WRONLY);
237 if (fd < 0)
238 return -1; /* fatal */
239
240 close (fd);
241
242 return 0;
243}
244
245void
246rxvt_ptytty::close_tty ()
247{
248 if (tty < 0)
249 return;
250
251 close (tty);
252 tty = -1;
253}
254
255bool
256rxvt_ptytty::make_controlling_tty ()
257{
258 return control_tty (tty) >= 0;
259}
260
261void
262rxvt_ptytty::set_utf8_mode (bool on)
263{
264#ifdef IUTF8
265 if (pty < 0)
266 return;
267
268 struct termios tio;
269
270 if (tcgetattr (pty, &tio) != -1)
271 { 378 }
272 tcflag_t new_cflag = tio.c_iflag;
273
274 if (on)
275 new_cflag |= IUTF8;
276 else
277 new_cflag &= ~IUTF8;
278
279 if (new_cflag != tio.c_iflag)
280 {
281 tio.c_iflag = new_cflag;
282 tcsetattr (pty, TCSANOW, &tio);
283 }
284 }
285#endif
286}
287
288static struct ttyconf {
289 gid_t gid;
290 mode_t mode;
291
292 ttyconf ()
293 {
294#ifdef TTY_GID_SUPPORT
295 struct group *gr = getgrnam ("tty");
296
297 if (gr)
298 { /* change group ownership of tty to "tty" */
299 mode = S_IRUSR | S_IWUSR | S_IWGRP;
300 gid = gr->gr_gid;
301 }
302 else
303#endif /* TTY_GID_SUPPORT */
304 {
305 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
306 gid = 0;
307 }
308 }
309} ttyconf;
310
311rxvt_ptytty_unix::rxvt_ptytty_unix ()
312{
313 name = 0;
314#if UTMP_SUPPORT
315 cmd_pid = 0;
316#endif
317}
318
319rxvt_ptytty_unix::~rxvt_ptytty_unix ()
320{
321#if UTMP_SUPPORT
322 logout ();
323#endif
324 put ();
325}
326
327void
328rxvt_ptytty_unix::put ()
329{
330 chmod (name, RESTORE_TTY_MODE);
331 chown (name, 0, ttyconf.gid);
332
333 close_tty ();
334
335 if (pty >= 0)
336 close (pty);
337
338 free (name);
339
340 pty = tty = -1;
341 name = 0;
342}
343
344bool
345rxvt_ptytty_unix::get ()
346{
347 /* get master (pty) */
348 if ((pty = get_pty (&tty, &name)) < 0)
349 return false;
350
351 fcntl (pty, F_SETFL, O_NONBLOCK);
352
353 /* get slave (tty) */
354 if (tty < 0)
355 {
356#ifndef NO_SETOWNER_TTYDEV
357 chown (name, getuid (), ttyconf.gid); /* fail silently */
358 chmod (name, ttyconf.mode);
359# ifdef HAVE_REVOKE
360 revoke (name);
361# endif 379#endif
362#endif
363
364 if ((tty = get_tty (name)) < 0)
365 {
366 put ();
367 return false;
368 }
369 }
370 380
371 return true; 381 return true;
372} 382}
373 383
374#if PTYTTY_HELPER
375
376static int sock_fd;
377static int pid;
378
379struct command
380{
381 enum { get, login, destroy } type;
382
383 rxvt_ptytty *id;
384
385 bool login_shell;
386 int cmd_pid;
387 char hostname[512]; // arbitrary, but should be plenty
388};
389
390struct rxvt_ptytty_proxy : zero_initialized, rxvt_ptytty
391{
392 rxvt_ptytty *id;
393
394 ~rxvt_ptytty_proxy ();
395
396 bool get ();
397 void login (int cmd_pid, bool login_shell, const char *hostname);
398};
399
400bool
401rxvt_ptytty_proxy::get ()
402{
403 command cmd;
404
405 cmd.type = command::get;
406
407 write (sock_fd, &cmd, sizeof (cmd));
408
409 if (read (sock_fd, &id, sizeof (id)) != sizeof (id))
410 rxvt_fatal ("protocol error while creating pty using helper process, aborting.\n");
411
412 if (!id)
413 return false;
414
415 if ((pty = rxvt_recv_fd (sock_fd)) < 0
416 || (tty = rxvt_recv_fd (sock_fd)) < 0)
417 rxvt_fatal ("protocol error while reading pty/tty fds from helper process, aborting.\n");
418
419 return true;
420}
421
422void
423rxvt_ptytty_proxy::login (int cmd_pid, bool login_shell, const char *hostname)
424{
425 command cmd;
426
427 cmd.type = command::login;
428 cmd.id = id;
429 cmd.cmd_pid = cmd_pid;
430 cmd.login_shell = login_shell;
431 strncpy (cmd.hostname, hostname, sizeof (cmd.hostname));
432
433 write (sock_fd, &cmd, sizeof (cmd));
434}
435
436rxvt_ptytty_proxy::~rxvt_ptytty_proxy ()
437{
438 command cmd;
439
440 cmd.type = command::destroy;
441 cmd.id = id;
442
443 write (sock_fd, &cmd, sizeof (cmd));
444}
445
446static
447void serve ()
448{
449 command cmd;
450 vector<rxvt_ptytty *> ptys;
451
452 while (read (sock_fd, &cmd, sizeof (command)) == sizeof (command))
453 {
454 if (cmd.type == command::get)
455 {
456 // -> id ptyfd ttyfd
457 cmd.id = new rxvt_ptytty_unix;
458
459 if (cmd.id->get ())
460 {
461 write (sock_fd, &cmd.id, sizeof (cmd.id));
462 ptys.push_back (cmd.id);
463
464 rxvt_send_fd (sock_fd, cmd.id->pty);
465 rxvt_send_fd (sock_fd, cmd.id->tty);
466 }
467 else
468 {
469 delete cmd.id;
470 cmd.id = 0;
471 write (sock_fd, &cmd.id, sizeof (cmd.id));
472 }
473 }
474 else if (cmd.type == command::login)
475 {
476#if UTMP_SUPPORT
477 if (find (ptys.begin (), ptys.end (), cmd.id))
478 {
479 cmd.hostname[sizeof (cmd.hostname) - 1] = 0;
480 cmd.id->login (cmd.cmd_pid, cmd.login_shell, cmd.hostname);
481 }
482#endif
483 }
484 else if (cmd.type == command::destroy)
485 {
486 rxvt_ptytty **pty = find (ptys.begin (), ptys.end (), cmd.id);
487
488 if (pty)
489 {
490 delete *pty;
491 ptys.erase (pty);
492 }
493 }
494 else
495 break;
496 }
497
498 // destroy all ptys
499 for (rxvt_ptytty **i = ptys.end (); i-- > ptys.begin (); )
500 delete *i;
501}
502
503void rxvt_ptytty_server ()
504{
505 int sv[2];
506
507 if (socketpair (AF_UNIX, SOCK_STREAM, 0, sv))
508 rxvt_fatal ("could not create socket to communicate with pty/sessiondb helper, aborting.\n");
509
510 pid = fork ();
511
512 if (pid < 0)
513 rxvt_fatal ("could not create pty/sessiondb helper process, aborting.\n");
514
515 if (pid)
516 {
517 // client, urxvt
518 sock_fd = sv[0];
519 close (sv[1]);
520 fcntl (sock_fd, F_SETFD, FD_CLOEXEC);
521 }
522 else
523 {
524 // server, pty-helper
525 sock_fd = sv[1];
526
527 for (int fd = 0; fd < 1023; fd++)
528 if (fd != sock_fd)
529 close (fd);
530
531 serve ();
532 _exit (EXIT_SUCCESS);
533 }
534}
535
536#endif
537
538// a "factory" *g*
539rxvt_ptytty *
540rxvt_new_ptytty ()
541{
542#if PTYTTY_HELPER
543 if (pid > 0)
544 // use helper process
545 return new rxvt_ptytty_proxy;
546 else
547#endif
548 return new rxvt_ptytty_unix;
549}
550
551/*----------------------- end-of-file (C source) -----------------------*/
552

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