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Comparing libptytty/src/ptytty.C (file contents):
Revision 1.2 by root, Sat Jan 21 22:01:36 2006 UTC vs.
Revision 1.52 by sf-exg, Thu Jan 19 20:07:14 2012 UTC

1/*--------------------------------*-C-*---------------------------------* 1/*----------------------------------------------------------------------*
2 * File: ptytty.C 2 * File: ptytty.C
3 *----------------------------------------------------------------------* 3 *----------------------------------------------------------------------*
4 * 4 *
5 * All portions of code are copyright by their respective author/s. 5 * All portions of code are copyright by their respective author/s.
6 * Copyright (c) 1999-2001 Geoff Wing <gcw@pobox.com> 6 * Copyright (c) 1999-2001 Geoff Wing <gcw@pobox.com>
7 * Copyright (c) 2004-2006 Marc Lehmann <pcg@goof.com> 7 * Copyright (c) 2004-2006 Marc Lehmann <schmorp@schmorp.de>
8 * Copyright (c) 2006 Emanuele Giaquinta <e.giaquinta@glauco.it>
8 * 9 *
9 * This program is free software; you can redistribute it and/or modify 10 * 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 11 * 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 12 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version. 13 * (at your option) any later version.
… …
19 * You should have received a copy of the GNU General Public License 20 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software 21 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 22 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 *---------------------------------------------------------------------*/ 23 *---------------------------------------------------------------------*/
23 24
24#include "../config.h" /* NECESSARY */ 25#include "config.h"
25 26
27#include "ptytty.h"
28
26#include <cstdlib> 29#include <stdlib.h>
30#include <stdio.h>
27#include <cstring> 31#include <string.h>
28 32
29#include <sys/types.h> 33#include <sys/types.h>
30#include <sys/socket.h> 34#include <sys/stat.h>
31#include <unistd.h> 35#include <unistd.h>
32#include <fcntl.h> 36#include <fcntl.h>
33 37
34#ifdef HAVE_SYS_IOCTL_H 38#ifdef HAVE_SYS_IOCTL_H
35# include <sys/ioctl.h> 39# include <sys/ioctl.h>
36#endif 40#endif
37#if defined(HAVE_DEV_PTMX) && defined(HAVE_SYS_STROPTS_H) 41#ifdef HAVE_STROPTS_H
38# include <sys/stropts.h> /* for I_PUSH */
39#endif
40#ifdef HAVE_ISASTREAM
41# include <stropts.h> 42# include <stropts.h>
42#endif 43#endif
43#if defined(HAVE_PTY_H) 44#if defined(HAVE_PTY_H)
44# include <pty.h> 45# include <pty.h>
45#elif defined(HAVE_LIBUTIL_H) 46#elif defined(HAVE_LIBUTIL_H)
… …
49#endif 50#endif
50#ifdef TTY_GID_SUPPORT 51#ifdef TTY_GID_SUPPORT
51#include <grp.h> 52#include <grp.h>
52#endif 53#endif
53 54
54#include <cstdio> 55#ifndef O_NOCTTY
55 56# define O_NOCTTY 0
56#include "rxvtutil.h" 57#endif
57#include "fdpass.h"
58#include "ptytty.h"
59 58
60///////////////////////////////////////////////////////////////////////////// 59/////////////////////////////////////////////////////////////////////////////
61 60
62/* ------------------------------------------------------------------------- * 61/* ------------------------------------------------------------------------- *
63 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 62 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
64 * ------------------------------------------------------------------------- */ 63 * ------------------------------------------------------------------------- */
65/* 64/*
66 * Returns pty file descriptor, or -1 on failure 65 * Returns pty file descriptor, or -1 on failure
67 * If successful, ttydev is set to the name of the slave device. 66 * 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 67 * fd_tty _may_ also be set to an open fd to the slave device
69 */ 68 */
70#if defined(UNIX98_PTY) 69#if defined(UNIX98_PTY)
70
71static int 71 static int
72get_pty (int *fd_tty, char **ttydev) 72 get_pty (int *fd_tty, char **ttydev)
73{ 73 {
74 int pfd; 74 int pfd;
75 75
76# if defined(HAVE_GETPT) 76# if defined(HAVE_GETPT)
77 pfd = getpt(); 77 pfd = getpt ();
78# elif defined(HAVE_POSIX_OPENPT) 78# elif defined(HAVE_POSIX_OPENPT)
79 pfd = posix_openpt (O_RDWR); 79 pfd = posix_openpt (O_RDWR | O_NOCTTY);
80# else 80# else
81# ifdef _AIX
81 pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0); 82 pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0);
83# else
84 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
85# endif
82# endif 86# endif
87
83 if (pfd >= 0) 88 if (pfd >= 0)
84 { 89 {
85 if (grantpt (pfd) == 0 /* change slave permissions */ 90 if (grantpt (pfd) == 0 /* change slave permissions */
86 && unlockpt (pfd) == 0) 91 && unlockpt (pfd) == 0)
92 {
87 { /* slave now unlocked */ 93 /* slave now unlocked */
88 *ttydev = strdup (ptsname (pfd)); /* get slave's name */ 94 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
89 return pfd; 95 return pfd;
90 } 96 }
91 97
92 close (pfd); 98 close (pfd);
93 } 99 }
94 100
95 return -1; 101 return -1;
96} 102 }
103
97#elif defined(HAVE_OPENPTY) 104#elif defined(HAVE_OPENPTY)
105
98static int 106 static int
99get_pty (int *fd_tty, char **ttydev) 107 get_pty (int *fd_tty, char **ttydev)
100{ 108 {
101 int pfd; 109 int pfd;
102 int res; 110 int res;
103 char tty_name[32]; 111
104
105 res = openpty (&pfd, fd_tty, tty_name, NULL, NULL); 112 res = openpty (&pfd, fd_tty, NULL, NULL, NULL);
113
106 if (res != -1) 114 if (res != -1)
107 { 115 {
108 *ttydev = strdup (tty_name); 116 *ttydev = strdup (ttyname (*fd_tty));
109 return pfd; 117 return pfd;
110 } 118 }
111 119
112 return -1; 120 return -1;
113} 121 }
122
114#elif defined(HAVE__GETPTY) 123#elif defined(HAVE__GETPTY)
124
115static int 125 static int
116get_pty (int *fd_tty, char **ttydev) 126 get_pty (int *fd_tty, char **ttydev)
117{ 127 {
118 int pfd; 128 int pfd;
129 char *slave;
119 130
120 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); 131 slave = _getpty (&pfd, O_RDWR | O_NOCTTY, 0622, 0);
121 if (*ttydev != NULL)
122 return pfd;
123 132
124 return -1; 133 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 { 134 {
134 *ttydev = strdup (ttyname (pfd)); 135 *ttydev = strdup (slave);
135 return pfd; 136 return pfd;
136 } 137 }
137 138
138 return -1; 139 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 } 140 }
151 141
152 return -1;
153}
154#else 142#else
143
155/* Based on the code in openssh/openbsd-compat/bsd-openpty.c */ 144 /* Based on the code in openssh/openbsd-compat/bsd-openpty.c */
156static int 145 static int
157get_pty (int *fd_tty, char **ttydev) 146 get_pty (int *fd_tty, char **ttydev)
158{ 147 {
159 int pfd; 148 int pfd;
160 int i; 149 int i;
161 char pty_name[32]; 150 char pty_name[32];
162 char tty_name[32]; 151 char tty_name[32];
163 const char *majors = "pqrstuvwxyzabcde"; 152 const char *majors = "pqrstuvwxyzabcde";
164 const char *minors = "0123456789abcdef"; 153 const char *minors = "0123456789abcdef";
154
165 for (i = 0; i < 256; i++) 155 for (i = 0; i < 256; i++)
166 { 156 {
167 snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]); 157 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]); 158 snprintf (tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]);
159
169 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1) 160 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
170 { 161 {
171 snprintf(pty_name, 32, "/dev/ptyp%d", i); 162 snprintf (pty_name, 32, "/dev/ptyp%d", i);
172 snprintf(tty_name, 32, "/dev/ttyp%d", i); 163 snprintf (tty_name, 32, "/dev/ttyp%d", i);
173 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1) 164 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
174 continue; 165 continue;
175 } 166 }
167
176 if (access (tty_name, R_OK | W_OK) == 0) 168 if (access (tty_name, R_OK | W_OK) == 0)
177 { 169 {
178 *ttydev = strdup (tty_name); 170 *ttydev = strdup (tty_name);
179 return pfd; 171 return pfd;
180 } 172 }
181 173
182 close (pfd); 174 close (pfd);
183 } 175 }
184} 176
177 return -1;
178 }
179
185#endif 180#endif
186 181
187/*----------------------------------------------------------------------*/ 182/*----------------------------------------------------------------------*/
188/* 183/*
189 * Returns tty file descriptor, or -1 on failure 184 * Returns tty file descriptor, or -1 on failure
190 */ 185 */
191static int 186static int
192get_tty (char *ttydev) 187get_tty (char *ttydev)
193{ 188{
194 return open (ttydev, O_RDWR | O_NOCTTY, 0); 189 return open (ttydev, O_RDWR | O_NOCTTY, 0);
… …
199 * Make our tty a controlling tty so that /dev/tty points to us 194 * Make our tty a controlling tty so that /dev/tty points to us
200 */ 195 */
201static int 196static int
202control_tty (int fd_tty) 197control_tty (int fd_tty)
203{ 198{
199 int fd;
200
204 setsid (); 201 setsid ();
205 202
206#if defined(HAVE_DEV_PTMX) && defined(I_PUSH) 203#ifdef TIOCSCTTY
204 ioctl (fd_tty, TIOCSCTTY, NULL);
205#else
206 fd = open (ttyname (fd_tty), O_RDWR);
207 if (fd >= 0)
208 close (fd);
209#endif
210
211 fd = open ("/dev/tty", O_WRONLY);
212 if (fd < 0)
213 return -1; /* fatal */
214
215 close (fd);
216
217 return 0;
218}
219
220void
221ptytty::close_tty ()
222{
223 if (tty < 0)
224 return;
225
226 close (tty);
227 tty = -1;
228}
229
230bool
231ptytty::make_controlling_tty ()
232{
233 return control_tty (tty) >= 0;
234}
235
236void
237ptytty::set_utf8_mode (bool on)
238{
239#ifdef IUTF8
240 if (pty < 0)
241 return;
242
243 struct termios tio;
244
245 if (tcgetattr (pty, &tio) != -1)
246 {
247 tcflag_t new_cflag = tio.c_iflag;
248
249 if (on)
250 new_cflag |= IUTF8;
251 else
252 new_cflag &= ~IUTF8;
253
254 if (new_cflag != tio.c_iflag)
255 {
256 tio.c_iflag = new_cflag;
257 tcsetattr (pty, TCSANOW, &tio);
258 }
259 }
260#endif
261}
262
263static struct ttyconf {
264 gid_t gid;
265 mode_t mode;
266
267 ttyconf ()
268 {
269#ifdef TTY_GID_SUPPORT
270 struct group *gr = getgrnam ("tty");
271
272 if (gr)
273 {
274 /* change group ownership of tty to "tty" */
275 mode = S_IRUSR | S_IWUSR | S_IWGRP;
276 gid = gr->gr_gid;
277 }
278 else
279#endif /* TTY_GID_SUPPORT */
280 {
281 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
282 gid = 0;
283 }
284 }
285} ttyconf;
286
287ptytty_unix::ptytty_unix ()
288{
289 name = 0;
290#if UTMP_SUPPORT
291 cmd_pid = 0;
292#endif
293}
294
295ptytty_unix::~ptytty_unix ()
296{
297#if UTMP_SUPPORT
298 logout ();
299#endif
300 put ();
301}
302
303void
304ptytty_unix::put ()
305{
306 if (name)
307 {
308 chmod (name, RESTORE_TTY_MODE);
309 chown (name, 0, ttyconf.gid);
310 }
311
312 close_tty ();
313
314 if (pty >= 0)
315 close (pty);
316
317 free (name);
318
319 pty = tty = -1;
320 name = 0;
321}
322
323bool
324ptytty_unix::get ()
325{
326 /* get master (pty) */
327 if ((pty = get_pty (&tty, &name)) < 0)
328 return false;
329
330 /* get slave (tty) */
331 if (tty < 0)
332 {
333#ifndef NO_SETOWNER_TTYDEV
334 chown (name, getuid (), ttyconf.gid); /* fail silently */
335 chmod (name, ttyconf.mode);
336# ifdef HAVE_REVOKE
337 revoke (name);
338# endif
339#endif
340
341 if ((tty = get_tty (name)) < 0)
342 {
343 put ();
344 return false;
345 }
346 }
347
348#if defined(I_PUSH)
207 /* 349 /*
208 * Push STREAMS modules: 350 * Push STREAMS modules:
209 * ptem: pseudo-terminal hardware emulation module. 351 * ptem: pseudo-terminal hardware emulation module.
210 * ldterm: standard terminal line discipline. 352 * ldterm: standard terminal line discipline.
211 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 353 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
212 * 354 *
213 * After we push the STREAMS modules, the first open () on the slave side 355 * 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 356 * 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 357 * 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 358 * 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 359 * 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 360 * 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 361 * 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 362 * close () - on the master side which causes a hang up to be sent
222 * through - Geoff Wing 363 * through - Geoff Wing
223 */ 364 */
224# ifdef HAVE_ISASTREAM 365#if defined(HAVE_ISASTREAM) && defined(HAVE_STROPTS_H)
225 if (isastream (fd_tty) == 1) 366 if (isastream (tty) == 1)
226# endif 367# endif
227 { 368 {
228 ioctl (fd_tty, I_PUSH, "ptem"); 369 ioctl (tty, I_PUSH, "ptem");
229 ioctl (fd_tty, I_PUSH, "ldterm"); 370 ioctl (tty, I_PUSH, "ldterm");
230 ioctl (fd_tty, I_PUSH, "ttcompat"); 371 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 { 372 }
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 373#endif
286}
287 374
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 375#if UTMP_SUPPORT
315 cmd_pid = 0; 376# if defined(HAVE_STRUCT_UTMP) && !defined(HAVE_UTMP_PID)
316#endif 377 int fd_stdin = dup (STDIN_FILENO);
317} 378 dup2 (tty, STDIN_FILENO);
318 379
319rxvt_ptytty_unix::~rxvt_ptytty_unix () 380 utmp_pos = ttyslot ();
320{
321#if UTMP_SUPPORT
322 logout ();
323#endif
324 put ();
325}
326 381
327void 382 dup2 (fd_stdin, STDIN_FILENO);
328rxvt_ptytty_unix::put () 383 close (fd_stdin);
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 384# endif
362#endif 385#endif
363 386
364 if ((tty = get_tty (name)) < 0)
365 {
366 put ();
367 return false;
368 }
369 }
370
371 return true; 387 return true;
372} 388}
373 389
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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