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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.10 by pcg, Fri Apr 2 20:41:01 2004 UTC vs.
Revision 1.54 by root, Sun Jan 22 00:48:13 2006 UTC

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

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