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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 1.52 by root, Thu Jan 19 20:30:36 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#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> 27#include <cstdlib>
38#endif 28#include <cstring>
39#ifdef HAVE_SYS_TYPES_H 29
40# include <sys/types.h> 30#include <sys/types.h>
41#endif 31#include <sys/socket.h>
42#ifdef HAVE_UNISTD_H
43# include <unistd.h> 32#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> 33#include <fcntl.h>
50#endif 34
51#ifdef HAVE_SYS_IOCTL_H 35#ifdef HAVE_SYS_IOCTL_H
52# include <sys/ioctl.h> 36# include <sys/ioctl.h>
53#endif 37#endif
54#if defined(PTYS_ARE_PTMX) && !defined(__CYGWIN32__) 38#if defined(PTYS_ARE_PTMX) && defined(HAVE_SYS_STROPTS_H)
55# include <sys/stropts.h> /* for I_PUSH */ 39# include <sys/stropts.h> /* for I_PUSH */
56#endif 40#endif
57#ifdef HAVE_ISASTREAM 41#ifdef HAVE_ISASTREAM
58# include <stropts.h> 42# include <stropts.h>
59#endif 43#endif
60 44#if defined(HAVE_PTY_H)
61#ifdef DEBUG_TTY 45# include <pty.h>
62# define D_TTY(x) fprintf x ; fputc('\n', stderr) ; fflush(stderr) 46#elif defined(HAVE_LIBUTIL_H)
63#else 47# include <libutil.h>
64# define D_TTY(x) 48#elif defined(HAVE_UTIL_H)
49# include <util.h>
65#endif 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/////////////////////////////////////////////////////////////////////////////
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 */ 69static inline int
76int
77rxvt_get_pty (int *fd_tty, const char **ttydev) 70get_pty_streams (int *fd_tty, char **ttydev)
78{ 71{
72#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
73# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_POSIX) || defined(PTYS_ARE_PTMX)
79 int pfd; 74 int pfd;
80 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{
81#ifdef PTYS_ARE_OPENPTY 103#ifdef PTYS_ARE_OPENPTY
82 104 int pfd;
83 char tty_name[sizeof "/dev/pts/????\0"]; 105 int res;
84 106 char tty_name[32];
107
85 if (openpty (&pfd, fd_tty, tty_name, NULL, NULL) != -1) 108 res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
109 if (res != -1)
86 { 110 {
87 *ttydev = strdup (tty_name); 111 *ttydev = strdup (tty_name);
88 return pfd; 112 return pfd;
89 } 113 }
90#endif 114#endif
91 115
116 return -1;
117}
118
119static inline int
120get_pty__getpty (int *fd_tty, char **ttydev)
121{
92#ifdef PTYS_ARE__GETPTY 122#ifdef PTYS_ARE__GETPTY
123 int pfd;
124
93 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); 125 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
94 if (*ttydev != NULL) 126 if (*ttydev != NULL)
95 return pfd; 127 return pfd;
96#endif 128#endif
97 129
98#ifdef PTYS_ARE_GETPTY 130 return -1;
131}
99 132
100 char *ptydev; 133static inline int
101 134get_pty_ptc (int *fd_tty, char **ttydev)
102 while ((ptydev = getpty ()) != NULL) 135{
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#ifdef PTYS_ARE_PTC
137 int pfd;
138
136 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) 139 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
137 { 140 {
138 *ttydev = ttyname (pfd); 141 *ttydev = strdup (ttyname (pfd));
139 return pfd; 142 return pfd;
140 } 143 }
141#endif 144#endif
142 145
146 return -1;
147}
148
149static inline int
150get_pty_clone (int *fd_tty, char **ttydev)
151{
143#ifdef PTYS_ARE_CLONE 152#ifdef PTYS_ARE_CLONE
153 int pfd;
154
144 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)
145 { 156 {
146 *ttydev = ptsname (pfd); 157 *ttydev = strdup (ptsname (pfd));
147 return pfd; 158 return pfd;
148 } 159 }
149#endif 160#endif
150 161
162 return -1;
163}
164
165static inline int
166get_pty_numeric (int *fd_tty, char **ttydev)
167{
151#ifdef PTYS_ARE_NUMERIC 168#ifdef PTYS_ARE_NUMERIC
152 { 169 int pfd;
153 int idx; 170 int idx;
154 char *c1, *c2; 171 char *c1, *c2;
155 char pty_name[] = "/dev/ptyp???"; 172 char pty_name[] = "/dev/ptyp???";
156 char tty_name[] = "/dev/ttyp???"; 173 char tty_name[] = "/dev/ttyp???";
157 174
158 c1 = & (pty_name[sizeof (pty_name) - 4]); 175 c1 = &(pty_name[sizeof (pty_name) - 4]);
159 c2 = & (tty_name[sizeof (tty_name) - 4]); 176 c2 = &(tty_name[sizeof (tty_name) - 4]);
177
160 for (idx = 0; idx < 256; idx++) 178 for (idx = 0; idx < 256; idx++)
161 { 179 {
162 sprintf (c1, "%d", idx); 180 sprintf (c1, "%d", idx);
163 sprintf (c2, "%d", idx); 181 sprintf (c2, "%d", idx);
182
164 if (access (tty_name, F_OK) < 0) 183 if (access (tty_name, F_OK) < 0)
165 { 184 {
166 idx = 256; 185 idx = 256;
167 break; 186 break;
168 } 187 }
188
169 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 189 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
170 { 190 {
171 if (access (tty_name, R_OK | W_OK) == 0) 191 if (access (tty_name, R_OK | W_OK) == 0)
172 { 192 {
173 *ttydev = strdup (tty_name); 193 *ttydev = strdup (tty_name);
174 return pfd; 194 return pfd;
175 } 195 }
196
176 close (pfd); 197 close (pfd);
177 } 198 }
178 } 199 }
179 }
180#endif 200#endif
201
202 return -1;
203}
204
205static inline int
206get_pty_searched (int *fd_tty, char **ttydev)
207{
181#ifdef PTYS_ARE_SEARCHED 208#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 209# ifndef PTYCHAR1
188# define PTYCHAR1 "pqrstuvwxyz" 210# define PTYCHAR1 "pqrstuvwxyz"
189# endif 211# endif
190# ifndef PTYCHAR2 212# ifndef PTYCHAR2
191# define PTYCHAR2 "0123456789abcdef" 213# define PTYCHAR2 "0123456789abcdef"
192# endif 214# endif
215 int pfd;
216 const char *c1, *c2;
217 char pty_name[] = "/dev/pty??";
218 char tty_name[] = "/dev/tty??";
193 219
194 for (c1 = PTYCHAR1; *c1; c1++) 220 for (c1 = PTYCHAR1; *c1; c1++)
195 { 221 {
196 pty_name[ (sizeof (pty_name) - 3)] = 222 pty_name[ (sizeof (pty_name) - 3)] =
197 tty_name[ (sizeof (pty_name) - 3)] = *c1; 223 tty_name[ (sizeof (pty_name) - 3)] = *c1;
224
198 for (c2 = PTYCHAR2; *c2; c2++) 225 for (c2 = PTYCHAR2; *c2; c2++)
199 { 226 {
200 pty_name[ (sizeof (pty_name) - 2)] = 227 pty_name[ (sizeof (pty_name) - 2)] =
201 tty_name[ (sizeof (pty_name) - 2)] = *c2; 228 tty_name[ (sizeof (pty_name) - 2)] = *c2;
229
202 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 230 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
203 { 231 {
204 if (access (tty_name, R_OK | W_OK) == 0) 232 if (access (tty_name, R_OK | W_OK) == 0)
205 { 233 {
206 *ttydev = strdup (tty_name); 234 *ttydev = strdup (tty_name);
207 return pfd; 235 return pfd;
208 } 236 }
237
209 close (pfd); 238 close (pfd);
210 } 239 }
211 } 240 }
212 } 241 }
213 }
214#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
215 return -1; 261 return -1;
216} 262}
217 263
218/*----------------------------------------------------------------------*/ 264/*----------------------------------------------------------------------*/
219/* 265/*
220 * Returns tty file descriptor, or -1 on failure 266 * Returns tty file descriptor, or -1 on failure
221 */ 267 */
222/* EXTPROTO */ 268static int
223int
224rxvt_get_tty (const char *ttydev) 269get_tty (char *ttydev)
225{ 270{
226 return open (ttydev, O_RDWR | O_NOCTTY, 0); 271 return open (ttydev, O_RDWR | O_NOCTTY, 0);
227} 272}
228 273
229/*----------------------------------------------------------------------*/ 274/*----------------------------------------------------------------------*/
230/* 275/*
231 * 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
232 */ 277 */
233/* EXTPROTO */ 278static int
234int 279control_tty (int fd_tty)
235rxvt_control_tty (int fd_tty, const char *ttydev)
236{ 280{
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 (); 281 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
252 282
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) 283#if defined(PTYS_ARE_PTMX) && defined(I_PUSH)
268 /* 284 /*
269 * Push STREAMS modules: 285 * Push STREAMS modules:
270 * ptem: pseudo-terminal hardware emulation module. 286 * ptem: pseudo-terminal hardware emulation module.
271 * ldterm: standard terminal line discipline. 287 * ldterm: standard terminal line discipline.
… …
284 */ 300 */
285# ifdef HAVE_ISASTREAM 301# ifdef HAVE_ISASTREAM
286 if (isastream (fd_tty) == 1) 302 if (isastream (fd_tty) == 1)
287# endif 303# endif
288 { 304 {
289 D_TTY ((stderr, "rxvt_control_tty (): Pushing STREAMS modules"));
290 ioctl (fd_tty, I_PUSH, "ptem"); 305 ioctl (fd_tty, I_PUSH, "ptem");
291 ioctl (fd_tty, I_PUSH, "ldterm"); 306 ioctl (fd_tty, I_PUSH, "ldterm");
292 ioctl (fd_tty, I_PUSH, "ttcompat"); 307 ioctl (fd_tty, I_PUSH, "ttcompat");
293 } 308 }
294#endif 309#endif
295 /* ---------------------------------------- */ 310
296# if defined(TIOCSCTTY)
297 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 311 ioctl (fd_tty, TIOCSCTTY, NULL);
298 D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSCTTY): %d", fd)); 312
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); 313 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) 314 if (fd < 0)
312 return -1; /* fatal */ 315 return -1; /* fatal */
316
313 close (fd); 317 close (fd);
314 /* ---------------------------------------- */
315 D_TTY ((stderr, "rxvt_control_tty (): tcgetpgrp (): %d getpgrp (): %d", tcgetpgrp (fd_tty), getpgrp ()));
316 /* ---------------------------------------- */
317#endif /* ! __QNX__ */
318 318
319 return 0; 319 return 0;
320} 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 name = 0;
391#if UTMP_SUPPORT
392 cmd_pid = 0;
393#endif
394}
395
396rxvt_ptytty_unix::~rxvt_ptytty_unix ()
397{
398#if UTMP_SUPPORT
399 logout ();
400#endif
401 put ();
402}
403
404void
405rxvt_ptytty_unix::put ()
406{
407 chmod (name, RESTORE_TTY_MODE);
408 chown (name, 0, ttyconf.gid);
409
410 close_tty ();
411
412 if (pty >= 0)
413 close (pty);
414
415 free (name);
416
417 pty = tty = -1;
418 name = 0;
419}
420
421bool
422rxvt_ptytty_unix::get ()
423{
424 /* get master (pty) */
425 if ((pty = get_pty (&tty, &name)) < 0)
426 return false;
427
428 fcntl (pty, F_SETFL, O_NONBLOCK);
429
430 /* get slave (tty) */
431 if (tty < 0)
432 {
433#ifndef NO_SETOWNER_TTYDEV
434 chown (name, getuid (), ttyconf.gid); /* fail silently */
435 chmod (name, ttyconf.mode);
436# ifdef HAVE_REVOKE
437 revoke (name);
438# endif
439#endif
440
441 if ((tty = get_tty (name)) < 0)
442 {
443 put ();
444 return false;
445 }
446 }
447
448 return true;
449}
450
451#if PTYTTY_HELPER
452
453static int sock_fd;
454static int pid;
455
456struct command
457{
458 enum { get, login, destroy } type;
459
460 rxvt_ptytty *id;
461
462 bool login_shell;
463 int cmd_pid;
464 char hostname[512]; // arbitrary, but should be plenty
465};
466
467struct rxvt_ptytty_proxy : zero_initialized, rxvt_ptytty
468{
469 rxvt_ptytty *id;
470
471 ~rxvt_ptytty_proxy ();
472
473 bool get ();
474 void login (int cmd_pid, bool login_shell, const char *hostname);
475};
476
477bool
478rxvt_ptytty_proxy::get ()
479{
480 command cmd;
481
482 cmd.type = command::get;
483
484 write (sock_fd, &cmd, sizeof (cmd));
485
486 if (read (sock_fd, &id, sizeof (id)) != sizeof (id))
487 rxvt_fatal ("protocol error while creating pty using helper process, aborting.\n");
488
489 if (!id)
490 return false;
491
492 if ((pty = rxvt_recv_fd (sock_fd)) < 0
493 || (tty = rxvt_recv_fd (sock_fd)) < 0)
494 rxvt_fatal ("protocol error while reading pty/tty fds from helper process, aborting.\n");
495
496 return true;
497}
498
499void
500rxvt_ptytty_proxy::login (int cmd_pid, bool login_shell, const char *hostname)
501{
502 command cmd;
503
504 cmd.type = command::login;
505 cmd.id = id;
506 cmd.cmd_pid = cmd_pid;
507 cmd.login_shell = login_shell;
508 strncpy (cmd.hostname, hostname, sizeof (cmd.hostname));
509
510 write (sock_fd, &cmd, sizeof (cmd));
511}
512
513rxvt_ptytty_proxy::~rxvt_ptytty_proxy ()
514{
515 command cmd;
516
517 cmd.type = command::destroy;
518 cmd.id = id;
519
520 write (sock_fd, &cmd, sizeof (cmd));
521}
522
523static
524void serve ()
525{
526 command cmd;
527 vector<rxvt_ptytty *> ptys;
528
529 while (read (sock_fd, &cmd, sizeof (command)) == sizeof (command))
530 {
531 if (cmd.type == command::get)
532 {
533 // -> id ptyfd ttyfd
534 cmd.id = new rxvt_ptytty_unix;
535
536 if (cmd.id->get ())
537 {
538 write (sock_fd, &cmd.id, sizeof (cmd.id));
539 ptys.push_back (cmd.id);
540
541 rxvt_send_fd (sock_fd, cmd.id->pty);
542 rxvt_send_fd (sock_fd, cmd.id->tty);
543 }
544 else
545 {
546 delete cmd.id;
547 cmd.id = 0;
548 write (sock_fd, &cmd.id, sizeof (cmd.id));
549 }
550 }
551 else if (cmd.type == command::login)
552 {
553#if UTMP_SUPPORT
554 if (find (ptys.begin (), ptys.end (), cmd.id))
555 {
556 cmd.hostname[sizeof (cmd.hostname) - 1] = 0;
557 cmd.id->login (cmd.cmd_pid, cmd.login_shell, cmd.hostname);
558 }
559#endif
560 }
561 else if (cmd.type == command::destroy)
562 {
563 rxvt_ptytty **pty = find (ptys.begin (), ptys.end (), cmd.id);
564
565 if (pty)
566 {
567 delete *pty;
568 ptys.erase (pty);
569 }
570 }
571 else
572 break;
573 }
574
575 // destroy all ptys
576 for (rxvt_ptytty **i = ptys.end (); i-- > ptys.begin (); )
577 delete *i;
578}
579
580void rxvt_ptytty_server ()
581{
582 int sv[2];
583
584 if (socketpair (AF_UNIX, SOCK_STREAM, 0, sv))
585 rxvt_fatal ("could not create socket to communicate with pty/sessiondb helper, aborting.\n");
586
587 pid = fork ();
588
589 if (pid < 0)
590 rxvt_fatal ("could not create pty/sessiondb helper process, aborting.\n");
591
592 if (pid)
593 {
594 // client, urxvt
595 sock_fd = sv[0];
596 close (sv[1]);
597 fcntl (sock_fd, F_SETFD, FD_CLOEXEC);
598 }
599 else
600 {
601 // server, pty-helper
602 sock_fd = sv[1];
603
604 for (int fd = 0; fd < 1023; fd++)
605 if (fd != sock_fd)
606 close (fd);
607
608 serve ();
609 _exit (EXIT_SUCCESS);
610 }
611}
612
613#endif
614
615// a "factory" *g*
616rxvt_ptytty *
617rxvt_new_ptytty ()
618{
619#if PTYTTY_HELPER
620 if (pid > 0)
621 // use helper process
622 return new rxvt_ptytty_proxy;
623 else
624#endif
625 return new rxvt_ptytty_unix;
626}
627
321/*----------------------- end-of-file (C source) -----------------------*/ 628/*----------------------- end-of-file (C source) -----------------------*/
629

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