ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/rxvt-unicode/src/ptytty.C
(Generate patch)

Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.44 by ayin, Tue Jan 17 17:59:31 2006 UTC vs.
Revision 1.67 by ayin, Mon Nov 19 11:26:34 2007 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 *
63 * ------------------------------------------------------------------------- */ 66 * ------------------------------------------------------------------------- */
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)
73
74 static int
70get_pty_streams (int *fd_tty, char **ttydev) 75 get_pty (int *fd_tty, char **ttydev)
71{ 76 {
72#ifdef NO_SETOWNER_TTYDEV
73 int pfd; 77 int pfd;
74 78
75# ifdef PTYS_ARE_GETPT 79# if defined(HAVE_GETPT)
76 pfd = getpt(); 80 pfd = getpt();
81# elif defined(HAVE_POSIX_OPENPT)
82 pfd = posix_openpt (O_RDWR);
77# else 83# else
78# ifdef PTYS_ARE_POSIX
79 pfd = posix_openpt (O_RDWR);
80# else
81 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 84 pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0);
82# endif 85# endif
83# endif 86
84 if (pfd >= 0) 87 if (pfd >= 0)
85 { 88 {
86 if (grantpt (pfd) == 0 /* change slave permissions */ 89 if (grantpt (pfd) == 0 /* change slave permissions */
87 && unlockpt (pfd) == 0) 90 && unlockpt (pfd) == 0)
88 { /* slave now unlocked */ 91 { /* slave now unlocked */
89 *ttydev = strdup (ptsname (pfd)); /* get slave's name */ 92 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
90 return pfd; 93 return pfd;
91 } 94 }
95
92 close (pfd); 96 close (pfd);
93 } 97 }
94#endif 98
95 return -1; 99 return -1;
96} 100 }
97 101
98static inline int 102#elif defined(HAVE_OPENPTY)
103
104 static int
99get_pty_openpty (int *fd_tty, char **ttydev) 105 get_pty (int *fd_tty, char **ttydev)
100{ 106 {
101#ifdef PTYS_ARE_OPENPTY
102 int pfd; 107 int pfd;
103 int res; 108 int res;
104 char tty_name[sizeof "/dev/pts/????\0"]; 109
105
106 res = openpty (&pfd, fd_tty, tty_name, NULL, NULL); 110 res = openpty (&pfd, fd_tty, NULL, NULL, NULL);
111
107 if (res != -1) 112 if (res != -1)
108 { 113 {
114 *ttydev = strdup (ttyname (*fd_tty));
115 return pfd;
116 }
117
118 return -1;
119 }
120
121#elif defined(HAVE__GETPTY)
122
123 static int
124 get_pty (int *fd_tty, char **ttydev)
125 {
126 int pfd;
127 char *slave;
128
129 slave = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
130
131 if (slave != NULL) {
109 *ttydev = strdup (tty_name); 132 *ttydev = strdup (slave);
110 return pfd; 133 return pfd;
111 } 134 }
112#endif 135
113 return -1; 136 return -1;
114} 137 }
115 138
116static inline int 139#elif defined(HAVE_DEV_PTC)
117get_pty__getpty (int *fd_tty, char **ttydev)
118{
119#ifdef PTYS_ARE__GETPTY
120 int pfd;
121 140
122 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); 141 static int
123 if (*ttydev != NULL)
124 return pfd;
125#endif
126 return -1;
127}
128
129static inline int
130get_pty_ptc (int *fd_tty, char **ttydev) 142 get_pty (int *fd_tty, char **ttydev)
131{ 143 {
132#ifdef PTYS_ARE_PTC
133 int pfd; 144 int pfd;
134 145
135 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) 146 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
136 {
137 *ttydev = strdup (ttyname (pfd));
138 return pfd;
139 }
140#endif
141 return -1;
142}
143
144static inline int
145get_pty_clone (int *fd_tty, char **ttydev)
146{
147#ifdef PTYS_ARE_CLONE
148 int pfd;
149
150 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
151 {
152 *ttydev = strdup (ptsname (pfd));
153 return pfd;
154 }
155#endif
156 return -1;
157}
158
159static inline int
160get_pty_numeric (int *fd_tty, char **ttydev)
161{
162#ifdef PTYS_ARE_NUMERIC
163 int pfd;
164 int idx;
165 char *c1, *c2;
166 char pty_name[] = "/dev/ptyp???";
167 char tty_name[] = "/dev/ttyp???";
168
169 c1 = &(pty_name[sizeof (pty_name) - 4]);
170 c2 = &(tty_name[sizeof (tty_name) - 4]);
171 for (idx = 0; idx < 256; idx++)
172 { 147 {
173 sprintf (c1, "%d", idx); 148 *ttydev = strdup (ttyname (pfd));
174 sprintf (c2, "%d", idx); 149 return pfd;
175 if (access (tty_name, F_OK) < 0) 150 }
151
152 return -1;
153 }
154
155#elif defined(HAVE_DEV_CLONE)
156
157 static int
158 get_pty (int *fd_tty, char **ttydev)
159 {
160 int pfd;
161
162 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
163 {
164 *ttydev = strdup (ptsname (pfd));
165 return pfd;
166 }
167
168 return -1;
169 }
170
171#else
172
173 /* Based on the code in openssh/openbsd-compat/bsd-openpty.c */
174 static int
175 get_pty (int *fd_tty, char **ttydev)
176 {
177 int pfd;
178 int i;
179 char pty_name[32];
180 char tty_name[32];
181 const char *majors = "pqrstuvwxyzabcde";
182 const char *minors = "0123456789abcdef";
183
184 for (i = 0; i < 256; i++)
185 {
186 snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]);
187 snprintf(tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]);
188
189 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
176 { 190 {
177 idx = 256; 191 snprintf(pty_name, 32, "/dev/ptyp%d", i);
178 break; 192 snprintf(tty_name, 32, "/dev/ttyp%d", i);
193 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
194 continue;
179 } 195 }
180 196
181 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 197 if (access (tty_name, R_OK | W_OK) == 0)
182 { 198 {
183 if (access (tty_name, R_OK | W_OK) == 0)
184 {
185 *ttydev = strdup (tty_name); 199 *ttydev = strdup (tty_name);
186 return pfd; 200 return pfd;
187 }
188
189 close (pfd);
190 } 201 }
202
203 close (pfd);
191 } 204 }
192#endif
193 return -1;
194}
195 205
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
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; 206 return -1;
249} 207 }
208
209#endif
250 210
251/*----------------------------------------------------------------------*/ 211/*----------------------------------------------------------------------*/
252/* 212/*
253 * Returns tty file descriptor, or -1 on failure 213 * Returns tty file descriptor, or -1 on failure
254 */ 214 */
255static int 215static int
256get_tty (char *ttydev) 216get_tty (char *ttydev)
257{ 217{
258 return open (ttydev, O_RDWR | O_NOCTTY, 0); 218 return open (ttydev, O_RDWR | O_NOCTTY, 0);
… …
265static int 225static int
266control_tty (int fd_tty) 226control_tty (int fd_tty)
267{ 227{
268 int fd; 228 int fd;
269 229
270 /* ---------------------------------------- */
271 setsid (); 230 setsid ();
272 231
273 /* ---------------------------------------- */
274# if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 232#if defined(HAVE_DEV_PTMX) && defined(I_PUSH)
275 /* 233 /*
276 * Push STREAMS modules: 234 * Push STREAMS modules:
277 * ptem: pseudo-terminal hardware emulation module. 235 * ptem: pseudo-terminal hardware emulation module.
278 * ldterm: standard terminal line discipline. 236 * ldterm: standard terminal line discipline.
279 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 237 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
… …
287 * documentation is really unclear about whether it is any close () on 245 * 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 246 * 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 247 * close () - on the master side which causes a hang up to be sent
290 * through - Geoff Wing 248 * through - Geoff Wing
291 */ 249 */
292# ifdef HAVE_ISASTREAM 250# ifdef HAVE_ISASTREAM
293 if (isastream (fd_tty) == 1) 251 if (isastream (fd_tty) == 1)
294# endif 252# endif
295 { 253 {
296 ioctl (fd_tty, I_PUSH, "ptem"); 254 ioctl (fd_tty, I_PUSH, "ptem");
297 ioctl (fd_tty, I_PUSH, "ldterm"); 255 ioctl (fd_tty, I_PUSH, "ldterm");
298 ioctl (fd_tty, I_PUSH, "ttcompat"); 256 ioctl (fd_tty, I_PUSH, "ttcompat");
299 } 257 }
300# endif 258#endif
301 /* ---------------------------------------- */ 259
260#ifdef TIOCSCTTY
302 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 261 ioctl (fd_tty, TIOCSCTTY, NULL);
303 /* ---------------------------------------- */ 262#else
263 fd = open (ttyname (fd_tty), O_RDWR);
264 if (fd >= 0)
265 close (fd);
266#endif
267
304 fd = open ("/dev/tty", O_WRONLY); 268 fd = open ("/dev/tty", O_WRONLY);
305 if (fd < 0) 269 if (fd < 0)
306 return -1; /* fatal */ 270 return -1; /* fatal */
271
307 close (fd); 272 close (fd);
308 /* ---------------------------------------- */
309 273
310 return 0; 274 return 0;
311} 275}
312 276
313void 277void
314rxvt_ptytty::close_tty () 278ptytty::close_tty ()
315{ 279{
316 if (tty < 0) 280 if (tty < 0)
317 return; 281 return;
318 282
319 close (tty); 283 close (tty);
320 tty = -1; 284 tty = -1;
321} 285}
322 286
323bool 287bool
324rxvt_ptytty::make_controlling_tty () 288ptytty::make_controlling_tty ()
325{ 289{
326 return control_tty (tty) >= 0; 290 return control_tty (tty) >= 0;
327} 291}
328 292
329void 293void
330rxvt_ptytty::set_utf8_mode (bool on) 294ptytty::set_utf8_mode (bool on)
331{ 295{
332#ifdef IUTF8 296#ifdef IUTF8
333 if (pty < 0) 297 if (pty < 0)
334 return; 298 return;
335 299
… …
351 } 315 }
352 } 316 }
353#endif 317#endif
354} 318}
355 319
356/////////////////////////////////////////////////////////////////////////////
357
358#ifndef NO_SETOWNER_TTYDEV
359static struct ttyconf { 320static struct ttyconf {
360 gid_t gid; 321 gid_t gid;
361 mode_t mode; 322 mode_t mode;
362 323
363 ttyconf () 324 ttyconf ()
… …
369 { /* change group ownership of tty to "tty" */ 330 { /* change group ownership of tty to "tty" */
370 mode = S_IRUSR | S_IWUSR | S_IWGRP; 331 mode = S_IRUSR | S_IWUSR | S_IWGRP;
371 gid = gr->gr_gid; 332 gid = gr->gr_gid;
372 } 333 }
373 else 334 else
374#endif /* TTY_GID_SUPPORT */ 335#endif /* TTY_GID_SUPPORT */
375 { 336 {
376 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; 337 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
377 gid = getgid (); 338 gid = 0;
378 } 339 }
379 } 340 }
380} ttyconf; 341} ttyconf;
381 342
382///////////////////////////////////////////////////////////////////////////// 343ptytty_unix::ptytty_unix ()
344{
345 name = 0;
346#if UTMP_SUPPORT
347 cmd_pid = 0;
348#endif
349}
350
351ptytty_unix::~ptytty_unix ()
352{
353#if UTMP_SUPPORT
354 logout ();
355#endif
356 put ();
357}
383 358
384void 359void
385rxvt_ptytty_unix::privileges (rxvt_privaction action) 360ptytty_unix::put ()
386{ 361{
387 if (!name || !*name) 362 if (name)
388 return;
389
390 if (action == SAVE)
391 { 363 {
392# ifndef RESET_TTY_TO_COMMON_DEFAULTS 364 chmod (name, RESTORE_TTY_MODE);
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); 365 chown (name, 0, ttyconf.gid);
418# endif
419
420 } 366 }
421}
422#endif
423 367
424rxvt_ptytty_unix::rxvt_ptytty_unix () 368 close_tty ();
425{ 369
370 if (pty >= 0)
371 close (pty);
372
373 free (name);
374
426 pty = tty = -1; 375 pty = tty = -1;
427 name = 0; 376 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} 377}
458 378
459bool 379bool
460rxvt_ptytty_unix::get () 380ptytty_unix::get ()
461{ 381{
462 /* get master (pty) */ 382 /* get master (pty) */
463 if ((pty = get_pty (&tty, &name)) < 0) 383 if ((pty = get_pty (&tty, &name)) < 0)
464 return false; 384 return false;
465 385
… …
467 387
468 /* get slave (tty) */ 388 /* get slave (tty) */
469 if (tty < 0) 389 if (tty < 0)
470 { 390 {
471#ifndef NO_SETOWNER_TTYDEV 391#ifndef NO_SETOWNER_TTYDEV
472 privileges (SAVE); 392 chown (name, getuid (), ttyconf.gid); /* fail silently */
393 chmod (name, ttyconf.mode);
394# ifdef HAVE_REVOKE
395 revoke (name);
396# endif
473#endif 397#endif
474 398
475 if ((tty = get_tty (name)) < 0) 399 if ((tty = get_tty (name)) < 0)
476 { 400 {
477 put (); 401 put ();
… …
480 } 404 }
481 405
482 return true; 406 return true;
483} 407}
484 408
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

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines