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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.16 by root, Sun Aug 15 03:30:04 2004 UTC vs.
Revision 1.54 by root, Sun Jan 22 00:48:13 2006 UTC

… …
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 Marc Lehmann <pcg@goof.com> 7 * Copyright (c) 2004-2006 Marc Lehmann <pcg@goof.com>
8 * 8 *
9 * 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
10 * 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
11 * the Free Software Foundation; either version 2 of the License, or 11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version. 12 * (at your option) any later version.
… …
20 * along with this program; if not, write to the Free Software 20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 *---------------------------------------------------------------------*/ 22 *---------------------------------------------------------------------*/
23 23
24#include "../config.h" /* NECESSARY */ 24#include "../config.h" /* NECESSARY */
25
26#include "fdpass.h"
25#include "rxvt.h" 27#include "ptytty.h"
26 28
27#ifdef HAVE_STDLIB_H
28# include <cstdlib> 29#include <cstdlib>
29#endif 30#include <cstring>
30#ifdef HAVE_SYS_TYPES_H 31
31# include <sys/types.h> 32#include <sys/types.h>
32#endif 33#include <sys/socket.h>
33#ifdef HAVE_UNISTD_H
34# include <unistd.h> 34#include <unistd.h>
35#endif
36#if defined(HAVE_STRING_H)
37# include <cstring>
38#endif
39#ifdef HAVE_FCNTL_H
40# include <fcntl.h> 35#include <fcntl.h>
41#endif 36
42#ifdef HAVE_SYS_IOCTL_H 37#ifdef HAVE_SYS_IOCTL_H
43# include <sys/ioctl.h> 38# include <sys/ioctl.h>
44#endif 39#endif
45#if defined(PTYS_ARE_PTMX) && defined(HAVE_SYS_STROPTS_H) 40#if defined(HAVE_DEV_PTMX) && defined(HAVE_SYS_STROPTS_H)
46# include <sys/stropts.h> /* for I_PUSH */ 41# include <sys/stropts.h> /* for I_PUSH */
47#endif 42#endif
48#ifdef HAVE_ISASTREAM 43#ifdef HAVE_ISASTREAM
49# include <stropts.h> 44# include <stropts.h>
50#endif 45#endif
51 46#if defined(HAVE_PTY_H)
52#if defined( __FreeBSD__) 47# include <pty.h>
53// better do this via configure, but.... 48#elif defined(HAVE_LIBUTIL_H)
54# include <libutil.h> 49# include <libutil.h>
50#elif defined(HAVE_UTIL_H)
51# include <util.h>
52#endif
53#ifdef TTY_GID_SUPPORT
54#include <grp.h>
55#endif 55#endif
56 56
57#include <cstdio> 57#include <cstdio>
58#include <grp.h> 58
59/////////////////////////////////////////////////////////////////////////////
59 60
60/* ------------------------------------------------------------------------- * 61/* ------------------------------------------------------------------------- *
61 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 62 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
62 * ------------------------------------------------------------------------- */ 63 * ------------------------------------------------------------------------- */
63/* 64/*
64 * Returns pty file descriptor, or -1 on failure 65 * Returns pty file descriptor, or -1 on failure
65 * 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.
66 * 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
67 */ 68 */
69#if defined(UNIX98_PTY)
68static int 70static int
69get_pty (int *fd_tty, char **ttydev) 71get_pty (int *fd_tty, char **ttydev)
70{ 72{
71 int pfd; 73 int pfd;
72 74
73#ifdef PTYS_ARE_OPENPTY 75# if defined(HAVE_GETPT)
74 char tty_name[sizeof "/dev/pts/????\0"]; 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 }
75 90
91 close (pfd);
92 }
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
76 if (openpty (&pfd, fd_tty, tty_name, NULL, NULL) != -1) 104 res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
105 if (res != -1)
77 { 106 {
78 *ttydev = strdup (tty_name); 107 *ttydev = strdup (tty_name);
79 return pfd; 108 return pfd;
80 } 109 }
81#endif
82 110
83#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
84 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); 119 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
85 if (*ttydev != NULL) 120 if (*ttydev != NULL)
86 return pfd; 121 return pfd;
87#endif
88 122
89#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;
90 130
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 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
109# endif
110
111 if (pfd >= 0)
112 {
113 if (grantpt (pfd) == 0 /* change slave permissions */
114 && unlockpt (pfd) == 0)
115 { /* slave now unlocked */
116 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
117 return pfd;
118 }
119 close (pfd);
120 }
121 }
122# endif
123#endif
124
125#ifdef PTYS_ARE_PTC
126 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) 131 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
127 { 132 {
128 *ttydev = strdup (ttyname (pfd)); 133 *ttydev = strdup (ttyname (pfd));
129 return pfd; 134 return pfd;
130 } 135 }
131#endif
132 136
133#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
134 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)
135 { 146 {
136 *ttydev = strdup (ptsname (pfd)); 147 *ttydev = strdup (ptsname (pfd));
137 return pfd; 148 return pfd;
138 } 149 }
139#endif
140
141#ifdef PTYS_ARE_NUMERIC
142 {
143 int idx;
144 char *c1, *c2;
145 char pty_name[] = "/dev/ptyp???";
146 char tty_name[] = "/dev/ttyp???";
147
148 c1 = &(pty_name[sizeof (pty_name) - 4]);
149 c2 = &(tty_name[sizeof (tty_name) - 4]);
150 for (idx = 0; idx < 256; idx++)
151 {
152 sprintf (c1, "%d", idx);
153 sprintf (c2, "%d", idx);
154 if (access (tty_name, F_OK) < 0)
155 {
156 idx = 256;
157 break;
158 }
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
168 close (pfd);
169 }
170 }
171 }
172#endif
173
174#ifdef PTYS_ARE_SEARCHED
175 {
176 const char *c1, *c2;
177 char pty_name[] = "/dev/pty??";
178 char tty_name[] = "/dev/tty??";
179
180# ifndef PTYCHAR1
181# define PTYCHAR1 "pqrstuvwxyz"
182# endif
183# ifndef PTYCHAR2
184# define PTYCHAR2 "0123456789abcdef"
185# endif
186
187 for (c1 = PTYCHAR1; *c1; c1++)
188 {
189 pty_name[ (sizeof (pty_name) - 3)] =
190 tty_name[ (sizeof (pty_name) - 3)] = *c1;
191 for (c2 = PTYCHAR2; *c2; c2++)
192 {
193 pty_name[ (sizeof (pty_name) - 2)] =
194 tty_name[ (sizeof (pty_name) - 2)] = *c2;
195 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
196 {
197 if (access (tty_name, R_OK | W_OK) == 0)
198 {
199 *ttydev = strdup (tty_name);
200 return pfd;
201 }
202
203 close (pfd);
204 }
205 }
206 }
207 }
208#endif
209 150
210 return -1; 151 return -1;
211} 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
212 185
213/*----------------------------------------------------------------------*/ 186/*----------------------------------------------------------------------*/
214/* 187/*
215 * Returns tty file descriptor, or -1 on failure 188 * Returns tty file descriptor, or -1 on failure
216 */ 189 */
… …
223/*----------------------------------------------------------------------*/ 196/*----------------------------------------------------------------------*/
224/* 197/*
225 * 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
226 */ 199 */
227static int 200static int
228control_tty (int fd_tty, const char *ttydev) 201control_tty (int fd_tty)
229{ 202{
230#ifndef __QNX__
231 int fd;
232
233 /* ---------------------------------------- */
234# ifdef HAVE_SETSID
235 setsid (); 203 setsid ();
236# endif
237# if defined(HAVE_SETPGID)
238 setpgid (0, 0);
239# elif defined(HAVE_SETPGRP)
240 setpgrp (0, 0);
241# endif
242 204
243 /* ---------------------------------------- */
244# ifdef TIOCNOTTY
245 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
246 if (fd >= 0)
247 {
248 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
249 close (fd);
250 }
251# endif
252
253 /* ---------------------------------------- */
254 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
255 if (fd >= 0)
256 close (fd); /* ouch: still have controlling tty */
257
258 /* ---------------------------------------- */
259#if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 205#if defined(HAVE_DEV_PTMX) && defined(I_PUSH)
260 /* 206 /*
261 * Push STREAMS modules: 207 * Push STREAMS modules:
262 * ptem: pseudo-terminal hardware emulation module. 208 * ptem: pseudo-terminal hardware emulation module.
263 * ldterm: standard terminal line discipline. 209 * ldterm: standard terminal line discipline.
264 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 210 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
… …
281 ioctl (fd_tty, I_PUSH, "ptem"); 227 ioctl (fd_tty, I_PUSH, "ptem");
282 ioctl (fd_tty, I_PUSH, "ldterm"); 228 ioctl (fd_tty, I_PUSH, "ldterm");
283 ioctl (fd_tty, I_PUSH, "ttcompat"); 229 ioctl (fd_tty, I_PUSH, "ttcompat");
284 } 230 }
285#endif 231#endif
286 /* ---------------------------------------- */ 232
287# if defined(TIOCSCTTY)
288 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 233 ioctl (fd_tty, TIOCSCTTY, NULL);
289# elif defined(TIOCSETCTTY) 234
290 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
291# else
292 fd = open (ttydev, O_RDWR);
293 if (fd >= 0)
294 close (fd);
295# endif
296 /* ---------------------------------------- */
297 fd = open ("/dev/tty", O_WRONLY); 235 int fd = open ("/dev/tty", O_WRONLY);
298 if (fd < 0) 236 if (fd < 0)
299 return -1; /* fatal */ 237 return -1; /* fatal */
238
300 close (fd); 239 close (fd);
301 /* ---------------------------------------- */
302#endif /* ! __QNX__ */
303 240
304 return 0; 241 return 0;
305} 242}
306 243
307#ifndef NO_SETOWNER_TTYDEV 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
308static struct ttyconf { 287static struct ttyconf {
309 gid_t gid; 288 gid_t gid;
310 mode_t mode; 289 mode_t mode;
311 290
312 ttyconf () 291 ttyconf ()
… …
321 } 300 }
322 else 301 else
323#endif /* TTY_GID_SUPPORT */ 302#endif /* TTY_GID_SUPPORT */
324 { 303 {
325 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; 304 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
326 gid = getgid (); 305 gid = 0;
327 } 306 }
328 } 307 }
329} ttyconf; 308} ttyconf;
330 309
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
331void 326void
332rxvt_ptytty::privileges (rxvt_privaction action) 327ptytty_unix::put ()
333{ 328{
334 rxvt_privileges (RESTORE); 329 chmod (name, RESTORE_TTY_MODE);
330 chown (name, 0, ttyconf.gid);
335 331
336 if (action == SAVE) 332 close_tty ();
337 {
338 //next_tty_action = RESTORE;
339# ifndef RESET_TTY_TO_COMMON_DEFAULTS
340 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
341 if (lstat (name, &savestat) < 0) /* you lose out */
342 ;//next_tty_action = IGNORE;
343 else
344# endif
345 333
346 { 334 if (pty >= 0)
347 chown (name, getuid (), ttyconf.gid); /* fail silently */ 335 close (pty);
348 chmod (name, ttyconf.mode);
349# ifdef HAVE_REVOKE
350 revoke (name);
351# endif
352 336
353 } 337 free (name);
354 }
355 else
356 { /* action == RESTORE */
357 //next_tty_action = IGNORE;
358# ifndef RESET_TTY_TO_COMMON_DEFAULTS
359 chmod (name, savestat.st_mode);
360 chown (name, savestat.st_uid, savestat.st_gid);
361# else
362 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
363 chown (name, 0, 0);
364# endif
365 338
366 }
367
368 rxvt_privileges (IGNORE);
369}
370#endif
371
372rxvt_ptytty::rxvt_ptytty ()
373{
374 pty = tty = -1; 339 pty = tty = -1;
375 name = 0; 340 name = 0;
376} 341}
377 342
378rxvt_ptytty::~rxvt_ptytty ()
379{
380 put ();
381}
382
383void
384
385rxvt_ptytty::close_tty ()
386{
387 if (tty >= 0) close (tty);
388 tty = -1;
389}
390
391void
392rxvt_ptytty::put ()
393{
394#ifndef NO_SETOWNER_TTYDEV
395 if (tty >= 0)
396 privileges (RESTORE);
397#endif
398
399 if (pty >= 0) close (pty);
400 close_tty ();
401 free (name);
402
403 pty = tty = -1;
404 name = 0;
405}
406
407bool 343bool
408rxvt_ptytty::make_controlling_tty () 344ptytty_unix::get ()
409{
410 return control_tty (tty, name) >= 0;
411}
412
413bool
414rxvt_ptytty::get ()
415{ 345{
416 /* get master (pty) */ 346 /* get master (pty) */
417 if ((pty = get_pty (&tty, &name)) < 0) 347 if ((pty = get_pty (&tty, &name)) < 0)
418 return false; 348 return false;
419 349
… …
421 351
422 /* get slave (tty) */ 352 /* get slave (tty) */
423 if (tty < 0) 353 if (tty < 0)
424 { 354 {
425#ifndef NO_SETOWNER_TTYDEV 355#ifndef NO_SETOWNER_TTYDEV
426 privileges (SAVE); 356 chown (name, getuid (), ttyconf.gid); /* fail silently */
357 chmod (name, ttyconf.mode);
358# ifdef HAVE_REVOKE
359 revoke (name);
360# endif
427#endif 361#endif
428 362
429 if ((tty = get_tty (name)) < 0) 363 if ((tty = get_tty (name)) < 0)
430 { 364 {
431 put (); 365 put ();
… …
434 } 368 }
435 369
436 return true; 370 return true;
437} 371}
438 372
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
439/*----------------------- end-of-file (C source) -----------------------*/ 558/*----------------------- end-of-file (C source) -----------------------*/
440 559

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