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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 1.49 by ayin, Thu Jan 19 16:40:42 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.
… …
19 * along with this program; if not, write to the Free Software 20 * along with this program; if not, write to the Free Software
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 */
25#include "rxvt.h"
24 26
25/*
26 * Try to be self-contained except for the above autoconfig'd defines
27 */
28
29#include <stdio.h>
30#ifdef HAVE_STDLIB_H
31# include <stdlib.h> 27#include <cstdlib>
32#endif 28#include <cstring>
33#ifdef HAVE_SYS_TYPES_H 29
34# include <sys/types.h> 30#include <sys/types.h>
35#endif 31#include <sys/socket.h>
36#ifdef HAVE_UNISTD_H
37# include <unistd.h> 32#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> 33#include <fcntl.h>
44#endif 34
45#ifdef HAVE_SYS_IOCTL_H 35#ifdef HAVE_SYS_IOCTL_H
46# include <sys/ioctl.h> 36# include <sys/ioctl.h>
47#endif 37#endif
48#if defined(PTYS_ARE_PTMX) && !defined(__CYGWIN32__) 38#if defined(PTYS_ARE_PTMX) && defined(HAVE_SYS_STROPTS_H)
49# include <sys/stropts.h> /* for I_PUSH */ 39# include <sys/stropts.h> /* for I_PUSH */
50#endif 40#endif
51 41#ifdef HAVE_ISASTREAM
52#ifdef DEBUG_TTY 42# include <stropts.h>
53# define D_TTY(x) fprintf x ; fputc('\n', stderr) ; fflush(stderr)
54#else
55# define D_TTY(x)
56#endif 43#endif
44#if defined(HAVE_PTY_H)
45# include <pty.h>
46#elif defined(HAVE_LIBUTIL_H)
47# include <libutil.h>
48#elif defined(HAVE_UTIL_H)
49# include <util.h>
50#endif
51
52#include <cstdio>
53#include <grp.h>
54
55#include "rxvtutil.h"
56#include "fdpass.h"
57#include "ptytty.h"
58
59/////////////////////////////////////////////////////////////////////////////
57 60
58/* ------------------------------------------------------------------------- * 61/* ------------------------------------------------------------------------- *
59 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 62 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
60 * ------------------------------------------------------------------------- */ 63 * ------------------------------------------------------------------------- */
61/* 64/*
62 * Returns pty file descriptor, or -1 on failure 65 * Returns pty file descriptor, or -1 on failure
63 * 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.
64 * 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
65 */ 68 */
66/* EXTPROTO */ 69static inline int
67int
68rxvt_get_pty (int *fd_tty, const char **ttydev) 70get_pty_streams (int *fd_tty, char **ttydev)
69{ 71{
72#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
73# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_POSIX) || defined(PTYS_ARE_PTMX)
70 int pfd; 74 int pfd;
71 75
76# if defined(PTYS_ARE_GETPT)
77 pfd = getpt();
78# elif defined(PTYS_ARE_POSIX)
79 pfd = posix_openpt (O_RDWR);
80# else
81 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
82# endif
83 if (pfd >= 0)
84 {
85 if (grantpt (pfd) == 0 /* change slave permissions */
86 && unlockpt (pfd) == 0)
87 { /* slave now unlocked */
88 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
89 return pfd;
90 }
91
92 close (pfd);
93 }
94# endif
95#endif
96
97 return -1;
98}
99
100static inline int
101get_pty_openpty (int *fd_tty, char **ttydev)
102{
72#ifdef PTYS_ARE_OPENPTY 103#ifdef PTYS_ARE_OPENPTY
73 104 int pfd;
105 int res;
74 char tty_name[sizeof "/dev/pts/????\0"]; 106 char tty_name[sizeof "/dev/pts/????\0"];
75 107
76 if (openpty (&pfd, fd_tty, tty_name, NULL, NULL) != -1) 108 res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
109 if (res != -1)
77 { 110 {
78 *ttydev = strdup (tty_name); 111 *ttydev = strdup (tty_name);
79 return pfd; 112 return pfd;
80 } 113 }
81#endif 114#endif
82 115
116 return -1;
117}
118
119static inline int
120get_pty__getpty (int *fd_tty, char **ttydev)
121{
83#ifdef PTYS_ARE__GETPTY 122#ifdef PTYS_ARE__GETPTY
123 int pfd;
124
84 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); 125 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
85 if (*ttydev != NULL) 126 if (*ttydev != NULL)
86 return pfd; 127 return pfd;
87#endif 128#endif
88 129
89#ifdef PTYS_ARE_GETPTY 130 return -1;
131}
90 132
91 char *ptydev; 133static inline int
92 134get_pty_ptc (int *fd_tty, char **ttydev)
93 while ((ptydev = getpty ()) != NULL) 135{
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 136#ifdef PTYS_ARE_PTC
137 int pfd;
138
127 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) 139 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
128 { 140 {
129 *ttydev = ttyname (pfd); 141 *ttydev = strdup (ttyname (pfd));
130 return pfd; 142 return pfd;
131 } 143 }
132#endif 144#endif
133 145
146 return -1;
147}
148
149static inline int
150get_pty_clone (int *fd_tty, char **ttydev)
151{
134#ifdef PTYS_ARE_CLONE 152#ifdef PTYS_ARE_CLONE
153 int pfd;
154
135 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 155 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
136 { 156 {
137 *ttydev = ptsname (pfd); 157 *ttydev = strdup (ptsname (pfd));
138 return pfd; 158 return pfd;
139 } 159 }
140#endif 160#endif
141 161
162 return -1;
163}
164
165static inline int
166get_pty_numeric (int *fd_tty, char **ttydev)
167{
142#ifdef PTYS_ARE_NUMERIC 168#ifdef PTYS_ARE_NUMERIC
143 { 169 int pfd;
144 int idx; 170 int idx;
145 char *c1, *c2; 171 char *c1, *c2;
146 char pty_name[] = "/dev/ptyp???"; 172 char pty_name[] = "/dev/ptyp???";
147 char tty_name[] = "/dev/ttyp???"; 173 char tty_name[] = "/dev/ttyp???";
148 174
149 c1 = & (pty_name[sizeof (pty_name) - 4]); 175 c1 = &(pty_name[sizeof (pty_name) - 4]);
150 c2 = & (tty_name[sizeof (tty_name) - 4]); 176 c2 = &(tty_name[sizeof (tty_name) - 4]);
177
151 for (idx = 0; idx < 256; idx++) 178 for (idx = 0; idx < 256; idx++)
152 { 179 {
153 sprintf (c1, "%d", idx); 180 sprintf (c1, "%d", idx);
154 sprintf (c2, "%d", idx); 181 sprintf (c2, "%d", idx);
182
155 if (access (tty_name, F_OK) < 0) 183 if (access (tty_name, F_OK) < 0)
156 { 184 {
157 idx = 256; 185 idx = 256;
158 break; 186 break;
159 } 187 }
188
160 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 189 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
161 { 190 {
162 if (access (tty_name, R_OK | W_OK) == 0) 191 if (access (tty_name, R_OK | W_OK) == 0)
163 { 192 {
164 *ttydev = strdup (tty_name); 193 *ttydev = strdup (tty_name);
165 return pfd; 194 return pfd;
166 } 195 }
196
167 close (pfd); 197 close (pfd);
168 } 198 }
169 } 199 }
170 }
171#endif 200#endif
201
202 return -1;
203}
204
205static inline int
206get_pty_searched (int *fd_tty, char **ttydev)
207{
172#ifdef PTYS_ARE_SEARCHED 208#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 209# ifndef PTYCHAR1
179# define PTYCHAR1 "pqrstuvwxyz" 210# define PTYCHAR1 "pqrstuvwxyz"
180# endif 211# endif
181# ifndef PTYCHAR2 212# ifndef PTYCHAR2
182# define PTYCHAR2 "0123456789abcdef" 213# define PTYCHAR2 "0123456789abcdef"
183# endif 214# endif
215 int pfd;
216 const char *c1, *c2;
217 char pty_name[] = "/dev/pty??";
218 char tty_name[] = "/dev/tty??";
184 219
185 for (c1 = PTYCHAR1; *c1; c1++) 220 for (c1 = PTYCHAR1; *c1; c1++)
186 { 221 {
187 pty_name[ (sizeof (pty_name) - 3)] = 222 pty_name[ (sizeof (pty_name) - 3)] =
188 tty_name[ (sizeof (pty_name) - 3)] = *c1; 223 tty_name[ (sizeof (pty_name) - 3)] = *c1;
224
189 for (c2 = PTYCHAR2; *c2; c2++) 225 for (c2 = PTYCHAR2; *c2; c2++)
190 { 226 {
191 pty_name[ (sizeof (pty_name) - 2)] = 227 pty_name[ (sizeof (pty_name) - 2)] =
192 tty_name[ (sizeof (pty_name) - 2)] = *c2; 228 tty_name[ (sizeof (pty_name) - 2)] = *c2;
229
193 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 230 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
194 { 231 {
195 if (access (tty_name, R_OK | W_OK) == 0) 232 if (access (tty_name, R_OK | W_OK) == 0)
196 { 233 {
197 *ttydev = strdup (tty_name); 234 *ttydev = strdup (tty_name);
198 return pfd; 235 return pfd;
199 } 236 }
237
200 close (pfd); 238 close (pfd);
201 } 239 }
202 } 240 }
203 } 241 }
204 }
205#endif 242#endif
243
244 return -1;
245}
246
247static int
248get_pty (int *fd_tty, char **ttydev)
249{
250 int pfd;
251
252 if ((pfd = get_pty_streams (fd_tty, ttydev)) != -1
253 || (pfd = get_pty_openpty (fd_tty, ttydev)) != -1
254 || (pfd = get_pty__getpty (fd_tty, ttydev)) != -1
255 || (pfd = get_pty_ptc (fd_tty, ttydev)) != -1
256 || (pfd = get_pty_clone (fd_tty, ttydev)) != -1
257 || (pfd = get_pty_numeric (fd_tty, ttydev)) != -1
258 || (pfd = get_pty_searched (fd_tty, ttydev)) != -1)
259 return pfd;
260
206 return -1; 261 return -1;
207} 262}
208 263
209/*----------------------------------------------------------------------*/ 264/*----------------------------------------------------------------------*/
210/* 265/*
211 * Returns tty file descriptor, or -1 on failure 266 * Returns tty file descriptor, or -1 on failure
212 */ 267 */
213/* EXTPROTO */ 268static int
214int
215rxvt_get_tty (const char *ttydev) 269get_tty (char *ttydev)
216{ 270{
217 return open (ttydev, O_RDWR | O_NOCTTY, 0); 271 return open (ttydev, O_RDWR | O_NOCTTY, 0);
218} 272}
219 273
220/*----------------------------------------------------------------------*/ 274/*----------------------------------------------------------------------*/
221/* 275/*
222 * Make our tty a controlling tty so that /dev/tty points to us 276 * Make our tty a controlling tty so that /dev/tty points to us
223 */ 277 */
224/* EXTPROTO */ 278static int
225int 279control_tty (int fd_tty)
226rxvt_control_tty (int fd_tty, const char *ttydev)
227{ 280{
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 (); 281 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
243 282
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) 283#if defined(PTYS_ARE_PTMX) && defined(I_PUSH)
259 /* 284 /*
260 * Push STREAMS modules: 285 * Push STREAMS modules:
261 * ptem: pseudo-terminal hardware emulation module. 286 * ptem: pseudo-terminal hardware emulation module.
262 * ldterm: standard terminal line discipline. 287 * ldterm: standard terminal line discipline.
… …
275 */ 300 */
276# ifdef HAVE_ISASTREAM 301# ifdef HAVE_ISASTREAM
277 if (isastream (fd_tty) == 1) 302 if (isastream (fd_tty) == 1)
278# endif 303# endif
279 { 304 {
280 D_TTY ((stderr, "rxvt_control_tty (): Pushing STREAMS modules"));
281 ioctl (fd_tty, I_PUSH, "ptem"); 305 ioctl (fd_tty, I_PUSH, "ptem");
282 ioctl (fd_tty, I_PUSH, "ldterm"); 306 ioctl (fd_tty, I_PUSH, "ldterm");
283 ioctl (fd_tty, I_PUSH, "ttcompat"); 307 ioctl (fd_tty, I_PUSH, "ttcompat");
284 } 308 }
285#endif 309#endif
286 /* ---------------------------------------- */ 310
287# if defined(TIOCSCTTY)
288 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 311 ioctl (fd_tty, TIOCSCTTY, NULL);
289 D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSCTTY): %d", fd)); 312
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); 313 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) 314 if (fd < 0)
303 return -1; /* fatal */ 315 return -1; /* fatal */
316
304 close (fd); 317 close (fd);
305 /* ---------------------------------------- */
306 D_TTY ((stderr, "rxvt_control_tty (): tcgetpgrp (): %d getpgrp (): %d", tcgetpgrp (fd_tty), getpgrp ()));
307 /* ---------------------------------------- */
308#endif /* ! __QNX__ */
309 318
310 return 0; 319 return 0;
311} 320}
321
322void
323rxvt_ptytty::close_tty ()
324{
325 if (tty < 0)
326 return;
327
328 close (tty);
329 tty = -1;
330}
331
332bool
333rxvt_ptytty::make_controlling_tty ()
334{
335 return control_tty (tty) >= 0;
336}
337
338void
339rxvt_ptytty::set_utf8_mode (bool on)
340{
341#ifdef IUTF8
342 if (pty < 0)
343 return;
344
345 struct termios tio;
346
347 if (tcgetattr (pty, &tio) != -1)
348 {
349 tcflag_t new_cflag = tio.c_iflag;
350
351 if (on)
352 new_cflag |= IUTF8;
353 else
354 new_cflag &= ~IUTF8;
355
356 if (new_cflag != tio.c_iflag)
357 {
358 tio.c_iflag = new_cflag;
359 tcsetattr (pty, TCSANOW, &tio);
360 }
361 }
362#endif
363}
364
365static struct ttyconf {
366 gid_t gid;
367 mode_t mode;
368
369 ttyconf ()
370 {
371#ifdef TTY_GID_SUPPORT
372 struct group *gr = getgrnam ("tty");
373
374 if (gr)
375 { /* change group ownership of tty to "tty" */
376 mode = S_IRUSR | S_IWUSR | S_IWGRP;
377 gid = gr->gr_gid;
378 }
379 else
380#endif /* TTY_GID_SUPPORT */
381 {
382 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
383 gid = 0;
384 }
385 }
386} ttyconf;
387
388rxvt_ptytty_unix::rxvt_ptytty_unix ()
389{
390 pty = tty = -1;
391 name = 0;
392#if UTMP_SUPPORT
393 cmd_pid = 0;
394#endif
395}
396
397rxvt_ptytty_unix::~rxvt_ptytty_unix ()
398{
399#if UTMP_SUPPORT
400 logout ();
401#endif
402 put ();
403}
404
405void
406rxvt_ptytty_unix::put ()
407{
408 chmod (name, RESTORE_TTY_MODE);
409 chown (name, 0, ttyconf.gid);
410
411 if (pty >= 0) close (pty);
412 close_tty ();
413 free (name);
414
415 pty = tty = -1;
416 name = 0;
417}
418
419bool
420rxvt_ptytty_unix::get ()
421{
422 /* get master (pty) */
423 if ((pty = get_pty (&tty, &name)) < 0)
424 return false;
425
426 fcntl (pty, F_SETFL, O_NONBLOCK);
427
428 /* get slave (tty) */
429 if (tty < 0)
430 {
431#ifndef NO_SETOWNER_TTYDEV
432 chown (name, getuid (), ttyconf.gid); /* fail silently */
433 chmod (name, ttyconf.mode);
434# ifdef HAVE_REVOKE
435 revoke (name);
436# endif
437#endif
438
439 if ((tty = get_tty (name)) < 0)
440 {
441 put ();
442 return false;
443 }
444 }
445
446 return true;
447}
448
449#if PTYTTY_HELPER
450
451static int sock_fd;
452static int pid;
453
454struct command
455{
456 enum { get, login, destroy } type;
457
458 rxvt_ptytty *id;
459
460 bool login_shell;
461 int cmd_pid;
462 char hostname[512]; // arbitrary, but should be plenty
463};
464
465struct rxvt_ptytty_proxy : zero_initialized, rxvt_ptytty
466{
467 rxvt_ptytty *id;
468
469 ~rxvt_ptytty_proxy ();
470
471 bool get ();
472 void login (int cmd_pid, bool login_shell, const char *hostname);
473};
474
475bool
476rxvt_ptytty_proxy::get ()
477{
478 command cmd;
479
480 cmd.type = command::get;
481
482 write (sock_fd, &cmd, sizeof (cmd));
483
484 if (read (sock_fd, &id, sizeof (id)) != sizeof (id))
485 rxvt_fatal ("protocol error while creating pty using helper process, aborting.\n");
486
487 if (!id)
488 return false;
489
490 if ((pty = rxvt_recv_fd (sock_fd)) < 0
491 || (tty = rxvt_recv_fd (sock_fd)) < 0)
492 rxvt_fatal ("protocol error while reading pty/tty fds from helper process, aborting.\n");
493
494 return true;
495}
496
497void
498rxvt_ptytty_proxy::login (int cmd_pid, bool login_shell, const char *hostname)
499{
500 command cmd;
501
502 cmd.type = command::login;
503 cmd.id = id;
504 cmd.cmd_pid = cmd_pid;
505 cmd.login_shell = login_shell;
506 strncpy (cmd.hostname, hostname, sizeof (cmd.hostname));
507
508 write (sock_fd, &cmd, sizeof (cmd));
509}
510
511rxvt_ptytty_proxy::~rxvt_ptytty_proxy ()
512{
513 command cmd;
514
515 cmd.type = command::destroy;
516 cmd.id = id;
517
518 write (sock_fd, &cmd, sizeof (cmd));
519}
520
521static
522void serve ()
523{
524 command cmd;
525 vector<rxvt_ptytty *> ptys;
526
527 while (read (sock_fd, &cmd, sizeof (command)) == sizeof (command))
528 {
529 if (cmd.type == command::get)
530 {
531 // -> id ptyfd ttyfd
532 cmd.id = new rxvt_ptytty_unix;
533
534 if (cmd.id->get ())
535 {
536 write (sock_fd, &cmd.id, sizeof (cmd.id));
537 ptys.push_back (cmd.id);
538
539 rxvt_send_fd (sock_fd, cmd.id->pty);
540 rxvt_send_fd (sock_fd, cmd.id->tty);
541 }
542 else
543 {
544 delete cmd.id;
545 cmd.id = 0;
546 write (sock_fd, &cmd.id, sizeof (cmd.id));
547 }
548 }
549 else if (cmd.type == command::login)
550 {
551#if UTMP_SUPPORT
552 if (find (ptys.begin (), ptys.end (), cmd.id))
553 {
554 cmd.hostname[sizeof (cmd.hostname) - 1] = 0;
555 cmd.id->login (cmd.cmd_pid, cmd.login_shell, cmd.hostname);
556 }
557#endif
558 }
559 else if (cmd.type == command::destroy)
560 {
561 rxvt_ptytty **pty = find (ptys.begin (), ptys.end (), cmd.id);
562
563 if (pty)
564 {
565 delete *pty;
566 ptys.erase (pty);
567 }
568 }
569 else
570 break;
571 }
572
573 // destroy all ptys
574 for (rxvt_ptytty **i = ptys.end (); i-- > ptys.begin (); )
575 delete *i;
576}
577
578void rxvt_ptytty_server ()
579{
580 int sv[2];
581
582 if (socketpair (AF_UNIX, SOCK_STREAM, 0, sv))
583 rxvt_fatal ("could not create socket to communicate with pty/sessiondb helper, aborting.\n");
584
585 pid = fork ();
586
587 if (pid < 0)
588 rxvt_fatal ("could not create pty/sessiondb helper process, aborting.\n");
589
590 if (pid)
591 {
592 // client, urxvt
593 sock_fd = sv[0];
594 close (sv[1]);
595 fcntl (sock_fd, F_SETFD, FD_CLOEXEC);
596 }
597 else
598 {
599 // server, pty-helper
600 sock_fd = sv[1];
601
602 for (int fd = 0; fd < 1023; fd++)
603 if (fd != sock_fd)
604 close (fd);
605
606 serve ();
607 _exit (EXIT_SUCCESS);
608 }
609}
610#endif
611
612// a "factory" *g*
613rxvt_ptytty *
614rxvt_new_ptytty ()
615{
616#if PTYTTY_HELPER
617 if (pid > 0)
618 // use helper process
619 return new rxvt_ptytty_proxy;
620 else
621#endif
622 return new rxvt_ptytty_unix;
623}
624
312/*----------------------- end-of-file (C source) -----------------------*/ 625/*----------------------- end-of-file (C source) -----------------------*/
626

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