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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.6 by pcg, Fri Feb 13 12:16:21 2004 UTC vs.
Revision 1.55 by root, Sun Jan 22 01:00:46 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>
10 * Copyright (c) 2004-2006 Marc Lehmann <pcg@goof.com>
7 * 11 *
8 * This program is free software; you can redistribute it and/or modify 12 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by 13 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or 14 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version. 15 * (at your option) any later version.
… …
18 * You should have received a copy of the GNU General Public License 22 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software 23 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 24 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 *---------------------------------------------------------------------*/ 25 *---------------------------------------------------------------------*/
22 26
23#include "../config.h" /* NECESSARY */ 27#include "../config.h"
24 28
25/* 29#include "fdpass.h"
26 * Try to be self-contained except for the above autoconfig'd defines 30#include "ptytty.h"
27 */
28 31
29#include <stdio.h>
30#ifdef HAVE_STDLIB_H
31# include <stdlib.h> 32#include <cstdlib>
32#endif 33#include <cstring>
33#ifdef HAVE_SYS_TYPES_H 34
34# include <sys/types.h> 35#include <sys/types.h>
35#endif 36#include <sys/socket.h>
36#ifdef HAVE_UNISTD_H
37# include <unistd.h> 37#include <unistd.h>
38#endif
39#if defined(HAVE_STRING_H)
40# include <string.h>
41#endif
42#ifdef HAVE_FCNTL_H
43# include <fcntl.h> 38#include <fcntl.h>
44#endif 39
45#ifdef HAVE_SYS_IOCTL_H 40#ifdef HAVE_SYS_IOCTL_H
46# include <sys/ioctl.h> 41# include <sys/ioctl.h>
47#endif 42#endif
48#if defined(PTYS_ARE_PTMX) && !defined(__CYGWIN32__) 43#if defined(HAVE_DEV_PTMX) && defined(HAVE_SYS_STROPTS_H)
49# include <sys/stropts.h> /* for I_PUSH */ 44# include <sys/stropts.h> /* for I_PUSH */
50#endif 45#endif
51 46#ifdef HAVE_ISASTREAM
52#ifdef DEBUG_TTY 47# include <stropts.h>
53# define D_TTY(x) fprintf x ; fputc('\n', stderr) ; fflush(stderr)
54#else
55# define D_TTY(x)
56#endif 48#endif
49#if defined(HAVE_PTY_H)
50# include <pty.h>
51#elif defined(HAVE_LIBUTIL_H)
52# include <libutil.h>
53#elif defined(HAVE_UTIL_H)
54# include <util.h>
55#endif
56#ifdef TTY_GID_SUPPORT
57#include <grp.h>
58#endif
59
60#include <cstdio>
61
62/////////////////////////////////////////////////////////////////////////////
57 63
58/* ------------------------------------------------------------------------- * 64/* ------------------------------------------------------------------------- *
59 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 65 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
60 * ------------------------------------------------------------------------- */ 66 * ------------------------------------------------------------------------- */
61/* 67/*
62 * Returns pty file descriptor, or -1 on failure 68 * Returns pty file descriptor, or -1 on failure
63 * 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.
64 * 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
65 */ 71 */
66/* EXTPROTO */ 72#if defined(UNIX98_PTY)
67int 73static int
68rxvt_get_pty (int *fd_tty, const char **ttydev) 74get_pty (int *fd_tty, char **ttydev)
69{ 75{
70 int pfd; 76 int pfd;
71 77
72#ifdef PTYS_ARE_OPENPTY 78# if defined(HAVE_GETPT)
79 pfd = getpt();
80# elif defined(HAVE_POSIX_OPENPT)
81 pfd = posix_openpt (O_RDWR);
82# else
83 pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0);
84# endif
85 if (pfd >= 0)
86 {
87 if (grantpt (pfd) == 0 /* change slave permissions */
88 && unlockpt (pfd) == 0)
89 { /* slave now unlocked */
90 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
91 return pfd;
92 }
73 93
74 char tty_name[sizeof "/dev/pts/????\0"]; 94 close (pfd);
95 }
75 96
97 return -1;
98}
99#elif defined(HAVE_OPENPTY)
100static int
101get_pty (int *fd_tty, char **ttydev)
102{
103 int pfd;
104 int res;
105 char tty_name[32];
106
76 if (openpty (&pfd, fd_tty, tty_name, NULL, NULL) != -1) 107 res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
108 if (res != -1)
77 { 109 {
78 *ttydev = strdup (tty_name); 110 *ttydev = strdup (tty_name);
79 return pfd; 111 return pfd;
80 } 112 }
81#endif
82 113
83#ifdef PTYS_ARE__GETPTY 114 return -1;
115}
116#elif defined(HAVE__GETPTY)
117static int
118get_pty (int *fd_tty, char **ttydev)
119{
120 int pfd;
121
84 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); 122 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
85 if (*ttydev != NULL) 123 if (*ttydev != NULL)
86 return pfd; 124 return pfd;
87#endif
88 125
89#ifdef PTYS_ARE_GETPTY 126 return -1;
127}
128#elif defined(HAVE_DEV_PTC)
129static int
130get_pty (int *fd_tty, char **ttydev)
131{
132 int pfd;
90 133
91 char *ptydev;
92
93 while ((ptydev = getpty ()) != NULL)
94 if ((pfd = open (ptydev, O_RDWR | O_NOCTTY, 0)) >= 0)
95 {
96 *ttydev = ptydev;
97 return pfd;
98 }
99#endif
100
101#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
102# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_PTMX)
103
104 {
105# ifdef PTYS_ARE_GETPT
106 pfd = getpt ();
107# else
108
109 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
110# endif
111
112 if (pfd >= 0)
113 {
114 if (grantpt (pfd) == 0 /* change slave permissions */
115 && unlockpt (pfd) == 0)
116 { /* slave now unlocked */
117 *ttydev = ptsname (pfd); /* get slave's name */
118 return pfd;
119 }
120 close (pfd);
121 }
122 }
123# endif
124#endif
125
126#ifdef PTYS_ARE_PTC
127 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) 134 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
128 { 135 {
129 *ttydev = ttyname (pfd); 136 *ttydev = strdup (ttyname (pfd));
130 return pfd; 137 return pfd;
131 } 138 }
132#endif
133 139
134#ifdef PTYS_ARE_CLONE 140 return -1;
141}
142#elif defined(HAVE_DEV_CLONE)
143static int
144get_pty (int *fd_tty, char **ttydev)
145{
146 int pfd;
147
135 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 148 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
136 { 149 {
137 *ttydev = ptsname (pfd); 150 *ttydev = strdup (ptsname (pfd));
138 return pfd; 151 return pfd;
139 } 152 }
140#endif
141 153
142#ifdef PTYS_ARE_NUMERIC
143 {
144 int idx;
145 char *c1, *c2;
146 char pty_name[] = "/dev/ptyp???";
147 char tty_name[] = "/dev/ttyp???";
148
149 c1 = & (pty_name[sizeof (pty_name) - 4]);
150 c2 = & (tty_name[sizeof (tty_name) - 4]);
151 for (idx = 0; idx < 256; idx++)
152 {
153 sprintf (c1, "%d", idx);
154 sprintf (c2, "%d", idx);
155 if (access (tty_name, F_OK) < 0)
156 {
157 idx = 256;
158 break;
159 }
160 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
161 {
162 if (access (tty_name, R_OK | W_OK) == 0)
163 {
164 *ttydev = strdup (tty_name);
165 return pfd;
166 }
167 close (pfd);
168 }
169 }
170 }
171#endif
172#ifdef PTYS_ARE_SEARCHED
173 {
174 const char *c1, *c2;
175 char pty_name[] = "/dev/pty??";
176 char tty_name[] = "/dev/tty??";
177
178# ifndef PTYCHAR1
179# define PTYCHAR1 "pqrstuvwxyz"
180# endif
181# ifndef PTYCHAR2
182# define PTYCHAR2 "0123456789abcdef"
183# endif
184
185 for (c1 = PTYCHAR1; *c1; c1++)
186 {
187 pty_name[ (sizeof (pty_name) - 3)] =
188 tty_name[ (sizeof (pty_name) - 3)] = *c1;
189 for (c2 = PTYCHAR2; *c2; c2++)
190 {
191 pty_name[ (sizeof (pty_name) - 2)] =
192 tty_name[ (sizeof (pty_name) - 2)] = *c2;
193 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
194 {
195 if (access (tty_name, R_OK | W_OK) == 0)
196 {
197 *ttydev = strdup (tty_name);
198 return pfd;
199 }
200 close (pfd);
201 }
202 }
203 }
204 }
205#endif
206 return -1; 154 return -1;
207} 155}
156#else
157/* Based on the code in openssh/openbsd-compat/bsd-openpty.c */
158static int
159get_pty (int *fd_tty, char **ttydev)
160{
161 int pfd;
162 int i;
163 char pty_name[32];
164 char tty_name[32];
165 const char *majors = "pqrstuvwxyzabcde";
166 const char *minors = "0123456789abcdef";
167 for (i = 0; i < 256; i++)
168 {
169 snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]);
170 snprintf(tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]);
171 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
172 {
173 snprintf(pty_name, 32, "/dev/ptyp%d", i);
174 snprintf(tty_name, 32, "/dev/ttyp%d", i);
175 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
176 continue;
177 }
178 if (access (tty_name, R_OK | W_OK) == 0)
179 {
180 *ttydev = strdup (tty_name);
181 return pfd;
182 }
183
184 close (pfd);
185 }
186}
187#endif
208 188
209/*----------------------------------------------------------------------*/ 189/*----------------------------------------------------------------------*/
210/* 190/*
211 * Returns tty file descriptor, or -1 on failure 191 * Returns tty file descriptor, or -1 on failure
212 */ 192 */
213/* EXTPROTO */ 193static int
214int
215rxvt_get_tty (const char *ttydev) 194get_tty (char *ttydev)
216{ 195{
217 return open (ttydev, O_RDWR | O_NOCTTY, 0); 196 return open (ttydev, O_RDWR | O_NOCTTY, 0);
218} 197}
219 198
220/*----------------------------------------------------------------------*/ 199/*----------------------------------------------------------------------*/
221/* 200/*
222 * Make our tty a controlling tty so that /dev/tty points to us 201 * Make our tty a controlling tty so that /dev/tty points to us
223 */ 202 */
224/* EXTPROTO */ 203static int
225int 204control_tty (int fd_tty)
226rxvt_control_tty (int fd_tty, const char *ttydev)
227{ 205{
228#ifndef __QNX__
229 int fd;
230
231 D_TTY ((stderr, "rxvt_control_tty (): pid: %d, tty fd: %d, dev: %s", getpid (), fd_tty, ttydev));
232 /* ---------------------------------------- */
233# ifdef HAVE_SETSID
234 setsid (); 206 setsid ();
235# endif
236# if defined(HAVE_SETPGID)
237 setpgid (0, 0);
238# elif defined(HAVE_SETPGRP)
239 setpgrp (0, 0);
240# endif
241 /* ---------------------------------------- */
242# ifdef TIOCNOTTY
243 207
244 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
245 D_TTY ((stderr, "rxvt_control_tty (): Voiding tty associations: previous=%s", fd < 0 ? "no" : "yes"));
246 if (fd >= 0)
247 {
248 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
249 close (fd);
250 }
251# endif
252 /* ---------------------------------------- */
253 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
254 D_TTY ((stderr, "rxvt_control_tty (): /dev/tty has controlling tty? %s", fd < 0 ? "no (good)" : "yes (bad)"));
255 if (fd >= 0)
256 close (fd); /* ouch: still have controlling tty */
257 /* ---------------------------------------- */
258#if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 208#if defined(HAVE_DEV_PTMX) && defined(I_PUSH)
259 /* 209 /*
260 * Push STREAMS modules: 210 * Push STREAMS modules:
261 * ptem: pseudo-terminal hardware emulation module. 211 * ptem: pseudo-terminal hardware emulation module.
262 * ldterm: standard terminal line discipline. 212 * ldterm: standard terminal line discipline.
263 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 213 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
… …
275 */ 225 */
276# ifdef HAVE_ISASTREAM 226# ifdef HAVE_ISASTREAM
277 if (isastream (fd_tty) == 1) 227 if (isastream (fd_tty) == 1)
278# endif 228# endif
279 { 229 {
280 D_TTY ((stderr, "rxvt_control_tty (): Pushing STREAMS modules"));
281 ioctl (fd_tty, I_PUSH, "ptem"); 230 ioctl (fd_tty, I_PUSH, "ptem");
282 ioctl (fd_tty, I_PUSH, "ldterm"); 231 ioctl (fd_tty, I_PUSH, "ldterm");
283 ioctl (fd_tty, I_PUSH, "ttcompat"); 232 ioctl (fd_tty, I_PUSH, "ttcompat");
284 } 233 }
285#endif 234#endif
286 /* ---------------------------------------- */ 235
287# if defined(TIOCSCTTY)
288 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 236 ioctl (fd_tty, TIOCSCTTY, NULL);
289 D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSCTTY): %d", fd)); 237
290# elif defined(TIOCSETCTTY)
291 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
292 D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSETCTTY): %d", fd));
293# else
294 fd = open (ttydev, O_RDWR);
295 D_TTY ((stderr, "rxvt_control_tty (): tty open%s", fd < 0 ? " failure" : "ed OK"));
296 if (fd >= 0)
297 close (fd);
298# endif
299 /* ---------------------------------------- */
300 fd = open ("/dev/tty", O_WRONLY); 238 int fd = open ("/dev/tty", O_WRONLY);
301 D_TTY ((stderr, "rxvt_control_tty (): do we have controlling tty now: %s", fd < 0 ? "no (fatal)" : "yes (good)"));
302 if (fd < 0) 239 if (fd < 0)
303 return -1; /* fatal */ 240 return -1; /* fatal */
241
304 close (fd); 242 close (fd);
305 /* ---------------------------------------- */
306 D_TTY ((stderr, "rxvt_control_tty (): tcgetpgrp (): %d getpgrp (): %d", tcgetpgrp (fd_tty), getpgrp ()));
307 /* ---------------------------------------- */
308#endif /* ! __QNX__ */
309 243
310 return 0; 244 return 0;
311} 245}
246
247void
248ptytty::close_tty ()
249{
250 if (tty < 0)
251 return;
252
253 close (tty);
254 tty = -1;
255}
256
257bool
258ptytty::make_controlling_tty ()
259{
260 return control_tty (tty) >= 0;
261}
262
263void
264ptytty::set_utf8_mode (bool on)
265{
266#ifdef IUTF8
267 if (pty < 0)
268 return;
269
270 struct termios tio;
271
272 if (tcgetattr (pty, &tio) != -1)
273 {
274 tcflag_t new_cflag = tio.c_iflag;
275
276 if (on)
277 new_cflag |= IUTF8;
278 else
279 new_cflag &= ~IUTF8;
280
281 if (new_cflag != tio.c_iflag)
282 {
283 tio.c_iflag = new_cflag;
284 tcsetattr (pty, TCSANOW, &tio);
285 }
286 }
287#endif
288}
289
290static struct ttyconf {
291 gid_t gid;
292 mode_t mode;
293
294 ttyconf ()
295 {
296#ifdef TTY_GID_SUPPORT
297 struct group *gr = getgrnam ("tty");
298
299 if (gr)
300 { /* change group ownership of tty to "tty" */
301 mode = S_IRUSR | S_IWUSR | S_IWGRP;
302 gid = gr->gr_gid;
303 }
304 else
305#endif /* TTY_GID_SUPPORT */
306 {
307 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
308 gid = 0;
309 }
310 }
311} ttyconf;
312
313ptytty_unix::ptytty_unix ()
314{
315 name = 0;
316#if UTMP_SUPPORT
317 cmd_pid = 0;
318#endif
319}
320
321ptytty_unix::~ptytty_unix ()
322{
323#if UTMP_SUPPORT
324 logout ();
325#endif
326 put ();
327}
328
329void
330ptytty_unix::put ()
331{
332 chmod (name, RESTORE_TTY_MODE);
333 chown (name, 0, ttyconf.gid);
334
335 close_tty ();
336
337 if (pty >= 0)
338 close (pty);
339
340 free (name);
341
342 pty = tty = -1;
343 name = 0;
344}
345
346bool
347ptytty_unix::get ()
348{
349 /* get master (pty) */
350 if ((pty = get_pty (&tty, &name)) < 0)
351 return false;
352
353 fcntl (pty, F_SETFL, O_NONBLOCK);
354
355 /* get slave (tty) */
356 if (tty < 0)
357 {
358#ifndef NO_SETOWNER_TTYDEV
359 chown (name, getuid (), ttyconf.gid); /* fail silently */
360 chmod (name, ttyconf.mode);
361# ifdef HAVE_REVOKE
362 revoke (name);
363# endif
364#endif
365
366 if ((tty = get_tty (name)) < 0)
367 {
368 put ();
369 return false;
370 }
371 }
372
373 return true;
374}
375
376#if PTYTTY_HELPER
377
378static int sock_fd;
379static int pid;
380
381struct command
382{
383 enum { get, login, destroy } type;
384
385 ptytty *id;
386
387 bool login_shell;
388 int cmd_pid;
389 char hostname[512]; // arbitrary, but should be plenty
390};
391
392struct ptytty_proxy : ptytty
393{
394 ptytty *id;
395
396 ptytty_proxy ()
397 : id(0)
398 {
399 }
400
401 ~ptytty_proxy ();
402
403 bool get ();
404 void login (int cmd_pid, bool login_shell, const char *hostname);
405};
406
407bool
408ptytty_proxy::get ()
409{
410 command cmd;
411
412 cmd.type = command::get;
413
414 write (sock_fd, &cmd, sizeof (cmd));
415
416 if (read (sock_fd, &id, sizeof (id)) != sizeof (id))
417 fatal ("protocol error while creating pty using helper process, aborting.\n");
418
419 if (!id)
420 return false;
421
422 if ((pty = ptytty_recv_fd (sock_fd)) < 0
423 || (tty = ptytty_recv_fd (sock_fd)) < 0)
424 fatal ("protocol error while reading pty/tty fds from helper process, aborting.\n");
425
426 return true;
427}
428
429void
430ptytty_proxy::login (int cmd_pid, bool login_shell, const char *hostname)
431{
432 command cmd;
433
434 cmd.type = command::login;
435 cmd.id = id;
436 cmd.cmd_pid = cmd_pid;
437 cmd.login_shell = login_shell;
438 strncpy (cmd.hostname, hostname, sizeof (cmd.hostname));
439
440 write (sock_fd, &cmd, sizeof (cmd));
441}
442
443ptytty_proxy::~ptytty_proxy ()
444{
445 if (id)
446 {
447 command cmd;
448
449 cmd.type = command::destroy;
450 cmd.id = id;
451
452 write (sock_fd, &cmd, sizeof (cmd));
453 }
454}
455
456static
457void serve ()
458{
459 command cmd;
460 vector<ptytty *> ptys;
461
462 while (read (sock_fd, &cmd, sizeof (command)) == sizeof (command))
463 {
464 if (cmd.type == command::get)
465 {
466 // -> id ptyfd ttyfd
467 cmd.id = new ptytty_unix;
468
469 if (cmd.id->get ())
470 {
471 write (sock_fd, &cmd.id, sizeof (cmd.id));
472 ptys.push_back (cmd.id);
473
474 ptytty_send_fd (sock_fd, cmd.id->pty);
475 ptytty_send_fd (sock_fd, cmd.id->tty);
476 }
477 else
478 {
479 delete cmd.id;
480 cmd.id = 0;
481 write (sock_fd, &cmd.id, sizeof (cmd.id));
482 }
483 }
484 else if (cmd.type == command::login)
485 {
486#if UTMP_SUPPORT
487 if (find (ptys.begin (), ptys.end (), cmd.id))
488 {
489 cmd.hostname[sizeof (cmd.hostname) - 1] = 0;
490 cmd.id->login (cmd.cmd_pid, cmd.login_shell, cmd.hostname);
491 }
492#endif
493 }
494 else if (cmd.type == command::destroy)
495 {
496 ptytty **pty = find (ptys.begin (), ptys.end (), cmd.id);
497
498 if (pty)
499 {
500 delete *pty;
501 ptys.erase (pty);
502 }
503 }
504 else
505 break;
506 }
507
508 // destroy all ptys
509 for (ptytty **i = ptys.end (); i-- > ptys.begin (); )
510 delete *i;
511}
512
513void ptytty_server ()
514{
515 int sv[2];
516
517 if (socketpair (AF_UNIX, SOCK_STREAM, 0, sv))
518 fatal ("could not create socket to communicate with pty/sessiondb helper, aborting.\n");
519
520 pid = fork ();
521
522 if (pid < 0)
523 fatal ("could not create pty/sessiondb helper process, aborting.\n");
524
525 if (pid)
526 {
527 // client, process
528 sock_fd = sv[0];
529 close (sv[1]);
530 fcntl (sock_fd, F_SETFD, FD_CLOEXEC);
531 }
532 else
533 {
534 // server, pty-helper
535 sock_fd = sv[1];
536
537 for (int fd = 0; fd < 1023; fd++)
538 if (fd != sock_fd)
539 close (fd);
540
541 serve ();
542 _exit (EXIT_SUCCESS);
543 }
544}
545
546#endif
547
548// a "factory" *g*
549ptytty *
550new_ptytty ()
551{
552#if PTYTTY_HELPER
553 if (pid > 0)
554 // use helper process
555 return new ptytty_proxy;
556 else
557#endif
558 return new ptytty_unix;
559}
560
312/*----------------------- end-of-file (C source) -----------------------*/ 561/*----------------------- end-of-file (C source) -----------------------*/
562

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