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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.44 by ayin, Tue Jan 17 17:59:31 2006 UTC vs.
Revision 1.61 by root, Wed Jan 25 10:51:26 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>
7 * Copyright (c) 2004-2006 Marc Lehmann <pcg@goof.com> 10 * Copyright (c) 2004-2006 Marc Lehmann <pcg@goof.com>
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
25#include "rxvt.h" 30#include "ptytty.h"
26 31
27#include <cstdlib> 32#include <cstdlib>
28#include <cstring> 33#include <cstring>
34#include <csignal>
29 35
30#include <sys/types.h> 36#include <sys/types.h>
31#include <sys/socket.h>
32#include <unistd.h> 37#include <unistd.h>
33#include <fcntl.h> 38#include <fcntl.h>
34 39
35#ifdef HAVE_SYS_IOCTL_H 40#ifdef HAVE_SYS_IOCTL_H
36# include <sys/ioctl.h> 41# include <sys/ioctl.h>
37#endif 42#endif
38#if defined(PTYS_ARE_PTMX) && defined(HAVE_SYS_STROPTS_H) 43#if defined(HAVE_DEV_PTMX) && defined(HAVE_SYS_STROPTS_H)
39# include <sys/stropts.h> /* for I_PUSH */ 44# include <sys/stropts.h> /* for I_PUSH */
40#endif 45#endif
41#ifdef HAVE_ISASTREAM 46#ifdef HAVE_ISASTREAM
42# include <stropts.h> 47# include <stropts.h>
43#endif 48#endif
… …
46#elif defined(HAVE_LIBUTIL_H) 51#elif defined(HAVE_LIBUTIL_H)
47# include <libutil.h> 52# include <libutil.h>
48#elif defined(HAVE_UTIL_H) 53#elif defined(HAVE_UTIL_H)
49# include <util.h> 54# include <util.h>
50#endif 55#endif
56#ifdef TTY_GID_SUPPORT
57#include <grp.h>
58#endif
51 59
52#include <cstdio> 60#include <cstdio>
53#include <grp.h>
54
55#include "rxvtutil.h"
56#include "fdpass.h"
57#include "ptytty.h"
58 61
59///////////////////////////////////////////////////////////////////////////// 62/////////////////////////////////////////////////////////////////////////////
60 63
61/* ------------------------------------------------------------------------- * 64/* ------------------------------------------------------------------------- *
62 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 65 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
… …
64/* 67/*
65 * Returns pty file descriptor, or -1 on failure 68 * Returns pty file descriptor, or -1 on failure
66 * 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.
67 * 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
68 */ 71 */
69static inline int 72#if defined(UNIX98_PTY)
73static int
70get_pty_streams (int *fd_tty, char **ttydev) 74get_pty (int *fd_tty, char **ttydev)
71{ 75{
72#ifdef NO_SETOWNER_TTYDEV
73 int pfd; 76 int pfd;
74 77
75# ifdef PTYS_ARE_GETPT 78# if defined(HAVE_GETPT)
76 pfd = getpt(); 79 pfd = getpt();
77# else 80# elif defined(HAVE_POSIX_OPENPT)
78# ifdef PTYS_ARE_POSIX
79 pfd = posix_openpt (O_RDWR); 81 pfd = posix_openpt (O_RDWR);
80# else 82# else
81 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 83 pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0);
82# endif
83# endif 84# endif
84 if (pfd >= 0) 85 if (pfd >= 0)
85 { 86 {
86 if (grantpt (pfd) == 0 /* change slave permissions */ 87 if (grantpt (pfd) == 0 /* change slave permissions */
87 && unlockpt (pfd) == 0) 88 && unlockpt (pfd) == 0)
88 { /* slave now unlocked */ 89 { /* slave now unlocked */
89 *ttydev = strdup (ptsname (pfd)); /* get slave's name */ 90 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
90 return pfd; 91 return pfd;
91 } 92 }
93
92 close (pfd); 94 close (pfd);
93 } 95 }
94#endif
95 return -1;
96}
97 96
98static inline int 97 return -1;
98}
99#elif defined(HAVE_OPENPTY)
100static int
99get_pty_openpty (int *fd_tty, char **ttydev) 101get_pty (int *fd_tty, char **ttydev)
100{ 102{
101#ifdef PTYS_ARE_OPENPTY
102 int pfd; 103 int pfd;
103 int res; 104 int res;
104 char tty_name[sizeof "/dev/pts/????\0"]; 105 char tty_name[32];
105 106
106 res = openpty (&pfd, fd_tty, tty_name, NULL, NULL); 107 res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
107 if (res != -1) 108 if (res != -1)
108 { 109 {
109 *ttydev = strdup (tty_name); 110 *ttydev = strdup (tty_name);
110 return pfd; 111 return pfd;
111 } 112 }
112#endif
113 return -1;
114}
115 113
116static inline int 114 return -1;
115}
116#elif defined(HAVE__GETPTY)
117static int
117get_pty__getpty (int *fd_tty, char **ttydev) 118get_pty (int *fd_tty, char **ttydev)
118{ 119{
119#ifdef PTYS_ARE__GETPTY
120 int pfd; 120 int pfd;
121 121
122 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); 122 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
123 if (*ttydev != NULL) 123 if (*ttydev != NULL)
124 return pfd; 124 return pfd;
125#endif
126 return -1;
127}
128 125
129static inline int 126 return -1;
127}
128#elif defined(HAVE_DEV_PTC)
129static int
130get_pty_ptc (int *fd_tty, char **ttydev) 130get_pty (int *fd_tty, char **ttydev)
131{ 131{
132#ifdef PTYS_ARE_PTC
133 int pfd; 132 int pfd;
134 133
135 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) 134 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
136 { 135 {
137 *ttydev = strdup (ttyname (pfd)); 136 *ttydev = strdup (ttyname (pfd));
138 return pfd; 137 return pfd;
139 } 138 }
140#endif
141 return -1;
142}
143 139
144static inline int 140 return -1;
141}
142#elif defined(HAVE_DEV_CLONE)
143static int
145get_pty_clone (int *fd_tty, char **ttydev) 144get_pty (int *fd_tty, char **ttydev)
146{ 145{
147#ifdef PTYS_ARE_CLONE
148 int pfd; 146 int pfd;
149 147
150 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)
151 { 149 {
152 *ttydev = strdup (ptsname (pfd)); 150 *ttydev = strdup (ptsname (pfd));
153 return pfd; 151 return pfd;
154 } 152 }
155#endif
156 return -1;
157}
158 153
159static inline int 154 return -1;
155}
156#else
157/* Based on the code in openssh/openbsd-compat/bsd-openpty.c */
158static int
160get_pty_numeric (int *fd_tty, char **ttydev) 159get_pty (int *fd_tty, char **ttydev)
161{ 160{
162#ifdef PTYS_ARE_NUMERIC
163 int pfd; 161 int pfd;
164 int idx; 162 int i;
165 char *c1, *c2; 163 char pty_name[32];
166 char pty_name[] = "/dev/ptyp???"; 164 char tty_name[32];
167 char tty_name[] = "/dev/ttyp???"; 165 const char *majors = "pqrstuvwxyzabcde";
168 166 const char *minors = "0123456789abcdef";
169 c1 = &(pty_name[sizeof (pty_name) - 4]);
170 c2 = &(tty_name[sizeof (tty_name) - 4]);
171 for (idx = 0; idx < 256; idx++) 167 for (i = 0; i < 256; i++)
172 { 168 {
173 sprintf (c1, "%d", idx); 169 snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]);
174 sprintf (c2, "%d", idx); 170 snprintf(tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]);
175 if (access (tty_name, F_OK) < 0)
176 {
177 idx = 256;
178 break;
179 }
180
181 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 171 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
182 { 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 }
183 if (access (tty_name, R_OK | W_OK) == 0) 178 if (access (tty_name, R_OK | W_OK) == 0)
184 { 179 {
185 *ttydev = strdup (tty_name); 180 *ttydev = strdup (tty_name);
186 return pfd; 181 return pfd;
187 }
188
189 close (pfd);
190 } 182 }
183
184 close (pfd);
191 } 185 }
192#endif
193 return -1;
194} 186}
195
196static inline int
197get_pty_searched (int *fd_tty, char **ttydev)
198{
199#ifdef PTYS_ARE_SEARCHED
200# ifndef PTYCHAR1
201# define PTYCHAR1 "pqrstuvwxyz"
202# endif 187#endif
203# ifndef PTYCHAR2
204# define PTYCHAR2 "0123456789abcdef"
205# endif
206 int pfd;
207 const char *c1, *c2;
208 char pty_name[] = "/dev/pty??";
209 char tty_name[] = "/dev/tty??";
210
211 for (c1 = PTYCHAR1; *c1; c1++)
212 {
213 pty_name[ (sizeof (pty_name) - 3)] =
214 tty_name[ (sizeof (pty_name) - 3)] = *c1;
215 for (c2 = PTYCHAR2; *c2; c2++)
216 {
217 pty_name[ (sizeof (pty_name) - 2)] =
218 tty_name[ (sizeof (pty_name) - 2)] = *c2;
219 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
220 {
221 if (access (tty_name, R_OK | W_OK) == 0)
222 {
223 *ttydev = strdup (tty_name);
224 return pfd;
225 }
226
227 close (pfd);
228 }
229 }
230 }
231#endif
232 return -1;
233}
234
235static int
236get_pty (int *fd_tty, char **ttydev)
237{
238 int pfd;
239
240 if ((pfd = get_pty_streams (fd_tty, ttydev)) != -1
241 || (pfd = get_pty_openpty (fd_tty, ttydev)) != -1
242 || (pfd = get_pty__getpty (fd_tty, ttydev)) != -1
243 || (pfd = get_pty_ptc (fd_tty, ttydev)) != -1
244 || (pfd = get_pty_clone (fd_tty, ttydev)) != -1
245 || (pfd = get_pty_numeric (fd_tty, ttydev)) != -1
246 || (pfd = get_pty_searched (fd_tty, ttydev)) != -1)
247 return pfd;
248 return -1;
249}
250 188
251/*----------------------------------------------------------------------*/ 189/*----------------------------------------------------------------------*/
252/* 190/*
253 * Returns tty file descriptor, or -1 on failure 191 * Returns tty file descriptor, or -1 on failure
254 */ 192 */
… …
263 * 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
264 */ 202 */
265static int 203static int
266control_tty (int fd_tty) 204control_tty (int fd_tty)
267{ 205{
268 int fd;
269
270 /* ---------------------------------------- */
271 setsid (); 206 setsid ();
272 207
273 /* ---------------------------------------- */
274# if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 208#if defined(HAVE_DEV_PTMX) && defined(I_PUSH)
275 /* 209 /*
276 * Push STREAMS modules: 210 * Push STREAMS modules:
277 * ptem: pseudo-terminal hardware emulation module. 211 * ptem: pseudo-terminal hardware emulation module.
278 * ldterm: standard terminal line discipline. 212 * ldterm: standard terminal line discipline.
279 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 213 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
… …
287 * documentation is really unclear about whether it is any close () on 221 * documentation is really unclear about whether it is any close () on
288 * the master side or the last close () - i.e. a proper STREAMS dismantling 222 * the master side or the last close () - i.e. a proper STREAMS dismantling
289 * close () - on the master side which causes a hang up to be sent 223 * close () - on the master side which causes a hang up to be sent
290 * through - Geoff Wing 224 * through - Geoff Wing
291 */ 225 */
292# ifdef HAVE_ISASTREAM 226# ifdef HAVE_ISASTREAM
293 if (isastream (fd_tty) == 1) 227 if (isastream (fd_tty) == 1)
294# endif 228# endif
295 { 229 {
296 ioctl (fd_tty, I_PUSH, "ptem"); 230 ioctl (fd_tty, I_PUSH, "ptem");
297 ioctl (fd_tty, I_PUSH, "ldterm"); 231 ioctl (fd_tty, I_PUSH, "ldterm");
298 ioctl (fd_tty, I_PUSH, "ttcompat"); 232 ioctl (fd_tty, I_PUSH, "ttcompat");
299 } 233 }
300# endif 234#endif
301 /* ---------------------------------------- */ 235
302 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 236 ioctl (fd_tty, TIOCSCTTY, NULL);
303 /* ---------------------------------------- */ 237
304 fd = open ("/dev/tty", O_WRONLY); 238 int fd = open ("/dev/tty", O_WRONLY);
305 if (fd < 0) 239 if (fd < 0)
306 return -1; /* fatal */ 240 return -1; /* fatal */
241
307 close (fd); 242 close (fd);
308 /* ---------------------------------------- */
309 243
310 return 0; 244 return 0;
311} 245}
312 246
313void 247void
314rxvt_ptytty::close_tty () 248ptytty::close_tty ()
315{ 249{
316 if (tty < 0) 250 if (tty < 0)
317 return; 251 return;
318 252
319 close (tty); 253 close (tty);
320 tty = -1; 254 tty = -1;
321} 255}
322 256
323bool 257bool
324rxvt_ptytty::make_controlling_tty () 258ptytty::make_controlling_tty ()
325{ 259{
326 return control_tty (tty) >= 0; 260 return control_tty (tty) >= 0;
327} 261}
328 262
329void 263void
330rxvt_ptytty::set_utf8_mode (bool on) 264ptytty::set_utf8_mode (bool on)
331{ 265{
332#ifdef IUTF8 266#ifdef IUTF8
333 if (pty < 0) 267 if (pty < 0)
334 return; 268 return;
335 269
… …
351 } 285 }
352 } 286 }
353#endif 287#endif
354} 288}
355 289
356/////////////////////////////////////////////////////////////////////////////
357
358#ifndef NO_SETOWNER_TTYDEV
359static struct ttyconf { 290static struct ttyconf {
360 gid_t gid; 291 gid_t gid;
361 mode_t mode; 292 mode_t mode;
362 293
363 ttyconf () 294 ttyconf ()
… …
372 } 303 }
373 else 304 else
374#endif /* TTY_GID_SUPPORT */ 305#endif /* TTY_GID_SUPPORT */
375 { 306 {
376 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; 307 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
377 gid = getgid (); 308 gid = 0;
378 } 309 }
379 } 310 }
380} ttyconf; 311} ttyconf;
381 312
382///////////////////////////////////////////////////////////////////////////// 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}
383 328
384void 329void
385rxvt_ptytty_unix::privileges (rxvt_privaction action) 330ptytty_unix::put ()
386{ 331{
387 if (!name || !*name) 332 chmod (name, RESTORE_TTY_MODE);
388 return; 333 chown (name, 0, ttyconf.gid);
389 334
390 if (action == SAVE) 335 close_tty ();
391 {
392# ifndef RESET_TTY_TO_COMMON_DEFAULTS
393 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
394 if (lstat (name, &savestat) < 0) /* you lose out */
395 ;
396 else
397# endif
398 {
399 saved = true;
400 chown (name, getuid (), ttyconf.gid); /* fail silently */
401 chmod (name, ttyconf.mode);
402# ifdef HAVE_REVOKE
403 revoke (name);
404# endif
405 }
406 }
407 else
408 { /* action == RESTORE */
409# ifndef RESET_TTY_TO_COMMON_DEFAULTS
410 if (saved)
411 {
412 chmod (name, savestat.st_mode);
413 chown (name, savestat.st_uid, savestat.st_gid);
414 }
415# else
416 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
417 chown (name, 0, 0);
418# endif
419 336
420 } 337 if (pty >= 0)
421} 338 close (pty);
422#endif
423 339
424rxvt_ptytty_unix::rxvt_ptytty_unix () 340 free (name);
425{ 341
426 pty = tty = -1; 342 pty = tty = -1;
427 name = 0; 343 name = 0;
428#ifndef NO_SETOWNER_TTYDEV
429 saved = false;
430#endif
431#if UTMP_SUPPORT
432 cmd_pid = 0;
433#endif
434}
435
436rxvt_ptytty_unix::~rxvt_ptytty_unix ()
437{
438#if UTMP_SUPPORT
439 logout ();
440#endif
441 put ();
442}
443
444void
445rxvt_ptytty_unix::put ()
446{
447#ifndef NO_SETOWNER_TTYDEV
448 privileges (RESTORE);
449#endif
450
451 if (pty >= 0) close (pty);
452 close_tty ();
453 free (name);
454
455 pty = tty = -1;
456 name = 0;
457} 344}
458 345
459bool 346bool
460rxvt_ptytty_unix::get () 347ptytty_unix::get ()
461{ 348{
462 /* get master (pty) */ 349 /* get master (pty) */
463 if ((pty = get_pty (&tty, &name)) < 0) 350 if ((pty = get_pty (&tty, &name)) < 0)
464 return false; 351 return false;
465 352
… …
467 354
468 /* get slave (tty) */ 355 /* get slave (tty) */
469 if (tty < 0) 356 if (tty < 0)
470 { 357 {
471#ifndef NO_SETOWNER_TTYDEV 358#ifndef NO_SETOWNER_TTYDEV
472 privileges (SAVE); 359 chown (name, getuid (), ttyconf.gid); /* fail silently */
360 chmod (name, ttyconf.mode);
361# ifdef HAVE_REVOKE
362 revoke (name);
363# endif
473#endif 364#endif
474 365
475 if ((tty = get_tty (name)) < 0) 366 if ((tty = get_tty (name)) < 0)
476 { 367 {
477 put (); 368 put ();
… …
480 } 371 }
481 372
482 return true; 373 return true;
483} 374}
484 375
485#if PTYTTY_HELPER
486
487static int sock_fd;
488static int pid;
489
490struct command
491{
492 enum { get, login, destroy } type;
493
494 rxvt_ptytty *id;
495
496 bool login_shell;
497 int cmd_pid;
498 char hostname[512]; // arbitrary, but should be plenty
499};
500
501struct rxvt_ptytty_proxy : zero_initialized, rxvt_ptytty
502{
503 rxvt_ptytty *id;
504
505 ~rxvt_ptytty_proxy ();
506
507 bool get ();
508 void login (int cmd_pid, bool login_shell, const char *hostname);
509};
510
511bool
512rxvt_ptytty_proxy::get ()
513{
514 command cmd;
515
516 cmd.type = command::get;
517
518 write (sock_fd, &cmd, sizeof (cmd));
519
520 if (read (sock_fd, &id, sizeof (id)) != sizeof (id))
521 rxvt_fatal ("protocol error while creating pty using helper process, aborting.\n");
522
523 if (!id)
524 return false;
525
526 if ((pty = rxvt_recv_fd (sock_fd)) < 0
527 || (tty = rxvt_recv_fd (sock_fd)) < 0)
528 rxvt_fatal ("protocol error while reading pty/tty fds from helper process, aborting.\n");
529
530 return true;
531}
532
533void
534rxvt_ptytty_proxy::login (int cmd_pid, bool login_shell, const char *hostname)
535{
536 command cmd;
537
538 cmd.type = command::login;
539 cmd.id = id;
540 cmd.cmd_pid = cmd_pid;
541 cmd.login_shell = login_shell;
542 strncpy (cmd.hostname, hostname, sizeof (cmd.hostname));
543
544 write (sock_fd, &cmd, sizeof (cmd));
545}
546
547rxvt_ptytty_proxy::~rxvt_ptytty_proxy ()
548{
549 command cmd;
550
551 cmd.type = command::destroy;
552 cmd.id = id;
553
554 write (sock_fd, &cmd, sizeof (cmd));
555}
556
557static
558void serve ()
559{
560 command cmd;
561 vector<rxvt_ptytty *> ptys;
562
563 while (read (sock_fd, &cmd, sizeof (command)) == sizeof (command))
564 {
565 if (cmd.type == command::get)
566 {
567 // -> id ptyfd ttyfd
568 cmd.id = new rxvt_ptytty_unix;
569
570 if (cmd.id->get ())
571 {
572 write (sock_fd, &cmd.id, sizeof (cmd.id));
573 ptys.push_back (cmd.id);
574
575 rxvt_send_fd (sock_fd, cmd.id->pty);
576 rxvt_send_fd (sock_fd, cmd.id->tty);
577 }
578 else
579 {
580 delete cmd.id;
581 cmd.id = 0;
582 write (sock_fd, &cmd.id, sizeof (cmd.id));
583 }
584 }
585 else if (cmd.type == command::login)
586 {
587#if UTMP_SUPPORT
588 if (find (ptys.begin (), ptys.end (), cmd.id))
589 {
590 cmd.hostname[sizeof (cmd.hostname) - 1] = 0;
591 cmd.id->login (cmd.cmd_pid, cmd.login_shell, cmd.hostname);
592 }
593#endif
594 }
595 else if (cmd.type == command::destroy)
596 {
597 rxvt_ptytty **pty = find (ptys.begin (), ptys.end (), cmd.id);
598
599 if (pty)
600 {
601 delete *pty;
602 ptys.erase (pty);
603 }
604 }
605 else
606 break;
607 }
608
609 // destroy all ptys
610 for (rxvt_ptytty **i = ptys.end (); i-- > ptys.begin (); )
611 delete *i;
612}
613
614void rxvt_ptytty_server ()
615{
616 int sv[2];
617
618 if (socketpair (AF_UNIX, SOCK_STREAM, 0, sv))
619 rxvt_fatal ("could not create socket to communicate with pty/sessiondb helper, aborting.\n");
620
621 pid = fork ();
622
623 if (pid < 0)
624 rxvt_fatal ("could not create pty/sessiondb helper process, aborting.\n");
625
626 if (pid)
627 {
628 // client, urxvt
629 sock_fd = sv[0];
630 close (sv[1]);
631 fcntl (sock_fd, F_SETFD, FD_CLOEXEC);
632 }
633 else
634 {
635 setgid (getegid ());
636 setuid (geteuid ());
637
638 // server, pty-helper
639 sock_fd = sv[1];
640
641 for (int fd = 0; fd < 1023; fd++)
642 if (fd != sock_fd && fd != 1)
643 close (fd);
644
645 serve ();
646 _exit (EXIT_SUCCESS);
647 }
648}
649#endif
650
651// a "factory" *g*
652rxvt_ptytty *
653rxvt_new_ptytty ()
654{
655#if PTYTTY_HELPER
656 if (pid > 0)
657 // use helper process
658 return new rxvt_ptytty_proxy;
659 else
660#endif
661 return new rxvt_ptytty_unix;
662}
663
664/*----------------------- end-of-file (C source) -----------------------*/
665

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