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 1.3 by pcg, Tue Nov 25 15:25:17 2003 UTC vs.
Revision 1.47 by root, Thu Jan 19 10:27:27 2006 UTC

1/*--------------------------------*-C-*---------------------------------* 1/*--------------------------------*-C-*---------------------------------*
2 * File: ptytty.c 2 * File: ptytty.C
3 *----------------------------------------------------------------------* 3 *----------------------------------------------------------------------*
4 * $Id: ptytty.C,v 1.3 2003/11/25 15:25:17 pcg Exp $
5 * 4 *
6 * All portions of code are copyright by their respective author/s. 5 * All portions of code are copyright by their respective author/s.
7 * 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>
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#include "rxvt.h"
25 26
26/*
27 * Try to be self-contained except for the above autoconfig'd defines
28 */
29
30#include <stdio.h>
31#ifdef HAVE_STDLIB_H
32# include <stdlib.h> 27#include <cstdlib>
33#endif 28#include <cstring>
34#ifdef HAVE_SYS_TYPES_H 29
35# include <sys/types.h> 30#include <sys/types.h>
36#endif 31#include <sys/socket.h>
37#ifdef HAVE_UNISTD_H
38# include <unistd.h> 32#include <unistd.h>
39#endif
40#if defined(HAVE_STRING_H)
41# include <string.h>
42#endif
43#ifdef HAVE_FCNTL_H
44# include <fcntl.h> 33#include <fcntl.h>
45#endif 34
46#ifdef HAVE_SYS_IOCTL_H 35#ifdef HAVE_SYS_IOCTL_H
47# include <sys/ioctl.h> 36# include <sys/ioctl.h>
48#endif 37#endif
49#if defined(PTYS_ARE_PTMX) && !defined(__CYGWIN32__) 38#if defined(PTYS_ARE_PTMX) && defined(HAVE_SYS_STROPTS_H)
50# include <sys/stropts.h> /* for I_PUSH */ 39# include <sys/stropts.h> /* for I_PUSH */
51#endif 40#endif
52 41#ifdef HAVE_ISASTREAM
53 42# include <stropts.h>
54#ifdef DEBUG_TTY
55# define D_TTY(x) fprintf x ; fputc('\n', stderr) ; fflush(stderr)
56#else
57# define D_TTY(x)
58#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/////////////////////////////////////////////////////////////////////////////
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 */
68/* EXTPROTO */ 69static inline int
69int
70rxvt_get_pty(int *fd_tty, const char **ttydev) 70get_pty_streams (int *fd_tty, char **ttydev)
71{ 71{
72#ifdef NO_SETOWNER_TTYDEV
72 int pfd; 73 int pfd;
73 74
75# if defined(PTYS_ARE_GETPT)
76 pfd = getpt();
77# elif defined(PTYS_ARE_POSIX)
78 pfd = posix_openpt (O_RDWR);
79# else
80 pfd = open ("/dev/ptmx", 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 }
90
91 close (pfd);
92 }
93#endif
94
95 return -1;
96}
97
98static inline int
99get_pty_openpty (int *fd_tty, char **ttydev)
100{
74#ifdef PTYS_ARE_OPENPTY 101#ifdef PTYS_ARE_OPENPTY
102 int pfd;
103 int res;
75 char tty_name[sizeof "/dev/pts/????\0"]; 104 char tty_name[sizeof "/dev/pts/????\0"];
76 105
77 if (openpty(&pfd, fd_tty, tty_name, NULL, NULL) != -1) { 106 res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
107 if (res != -1)
108 {
78 *ttydev = strdup(tty_name); 109 *ttydev = strdup (tty_name);
79 return pfd; 110 return pfd;
80 } 111 }
81#endif 112#endif
82 113
114 return -1;
115}
116
117static inline int
118get_pty__getpty (int *fd_tty, char **ttydev)
119{
83#ifdef PTYS_ARE__GETPTY 120#ifdef PTYS_ARE__GETPTY
121 int pfd;
122
84 *ttydev = _getpty(&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); 123 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
85 if (*ttydev != NULL) 124 if (*ttydev != NULL)
86 return pfd;
87#endif
88
89#ifdef PTYS_ARE_GETPTY
90 char *ptydev;
91
92 while ((ptydev = getpty()) != NULL)
93 if ((pfd = open(ptydev, O_RDWR | O_NOCTTY, 0)) >= 0) {
94 *ttydev = ptydev;
95 return pfd; 125 return pfd;
96 }
97#endif
98
99#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
100# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_PTMX)
101 {
102# ifdef PTYS_ARE_GETPT
103 pfd = getpt();
104# else
105 pfd = open("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
106# endif
107 if (pfd >= 0) {
108 if (grantpt(pfd) == 0 /* change slave permissions */
109 && unlockpt(pfd) == 0) { /* slave now unlocked */
110 *ttydev = ptsname(pfd); /* get slave's name */
111 return pfd;
112 }
113 close(pfd);
114 }
115 }
116# endif 126#endif
117#endif
118 127
128 return -1;
129}
130
131static inline int
132get_pty_ptc (int *fd_tty, char **ttydev)
133{
119#ifdef PTYS_ARE_PTC 134#ifdef PTYS_ARE_PTC
135 int pfd;
136
120 if ((pfd = open("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) { 137 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
121 *ttydev = ttyname(pfd);
122 return pfd;
123 } 138 {
139 *ttydev = strdup (ttyname (pfd));
140 return pfd;
141 }
124#endif 142#endif
125 143
144 return -1;
145}
146
147static inline int
148get_pty_clone (int *fd_tty, char **ttydev)
149{
126#ifdef PTYS_ARE_CLONE 150#ifdef PTYS_ARE_CLONE
151 int pfd;
152
127 if ((pfd = open("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) { 153 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
128 *ttydev = ptsname(pfd);
129 return pfd;
130 } 154 {
155 *ttydev = strdup (ptsname (pfd));
156 return pfd;
157 }
131#endif 158#endif
132 159
160 return -1;
161}
162
163static inline int
164get_pty_numeric (int *fd_tty, char **ttydev)
165{
133#ifdef PTYS_ARE_NUMERIC 166#ifdef PTYS_ARE_NUMERIC
134 { 167 int pfd;
135 int idx; 168 int idx;
136 char *c1, *c2; 169 char *c1, *c2;
137 char pty_name[] = "/dev/ptyp???"; 170 char pty_name[] = "/dev/ptyp???";
138 char tty_name[] = "/dev/ttyp???"; 171 char tty_name[] = "/dev/ttyp???";
139 172
140 c1 = &(pty_name[sizeof(pty_name) - 4]); 173 c1 = &(pty_name[sizeof (pty_name) - 4]);
141 c2 = &(tty_name[sizeof(tty_name) - 4]); 174 c2 = &(tty_name[sizeof (tty_name) - 4]);
175
142 for (idx = 0; idx < 256; idx++) { 176 for (idx = 0; idx < 256; idx++)
177 {
143 sprintf(c1, "%d", idx); 178 sprintf (c1, "%d", idx);
144 sprintf(c2, "%d", idx); 179 sprintf (c2, "%d", idx);
180
145 if (access(tty_name, F_OK) < 0) { 181 if (access (tty_name, F_OK) < 0)
146 idx = 256; 182 {
147 break; 183 idx = 256;
148 } 184 break;
185 }
186
149 if ((pfd = open(pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) { 187 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
188 {
150 if (access(tty_name, R_OK | W_OK) == 0) { 189 if (access (tty_name, R_OK | W_OK) == 0)
190 {
151 *ttydev = strdup(tty_name); 191 *ttydev = strdup (tty_name);
152 return pfd; 192 return pfd;
153 } 193 }
154 close(pfd); 194
195 close (pfd);
196 }
155 } 197 }
156 }
157 }
158#endif 198#endif
199
200 return -1;
201}
202
203static inline int
204get_pty_searched (int *fd_tty, char **ttydev)
205{
159#ifdef PTYS_ARE_SEARCHED 206#ifdef PTYS_ARE_SEARCHED
160 {
161 const char *c1, *c2;
162 char pty_name[] = "/dev/pty??";
163 char tty_name[] = "/dev/tty??";
164
165# ifndef PTYCHAR1 207# ifndef PTYCHAR1
166# define PTYCHAR1 "pqrstuvwxyz" 208# define PTYCHAR1 "pqrstuvwxyz"
167# endif 209# endif
168# ifndef PTYCHAR2 210# ifndef PTYCHAR2
169# define PTYCHAR2 "0123456789abcdef" 211# define PTYCHAR2 "0123456789abcdef"
170# endif 212# endif
213 int pfd;
214 const char *c1, *c2;
215 char pty_name[] = "/dev/pty??";
216 char tty_name[] = "/dev/tty??";
217
171 for (c1 = PTYCHAR1; *c1; c1++) { 218 for (c1 = PTYCHAR1; *c1; c1++)
219 {
172 pty_name[(sizeof(pty_name) - 3)] = 220 pty_name[ (sizeof (pty_name) - 3)] =
173 tty_name[(sizeof(pty_name) - 3)] = *c1; 221 tty_name[ (sizeof (pty_name) - 3)] = *c1;
222
174 for (c2 = PTYCHAR2; *c2; c2++) { 223 for (c2 = PTYCHAR2; *c2; c2++)
224 {
175 pty_name[(sizeof(pty_name) - 2)] = 225 pty_name[ (sizeof (pty_name) - 2)] =
176 tty_name[(sizeof(pty_name) - 2)] = *c2; 226 tty_name[ (sizeof (pty_name) - 2)] = *c2;
227
177 if ((pfd = open(pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) { 228 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
229 {
178 if (access(tty_name, R_OK | W_OK) == 0) { 230 if (access (tty_name, R_OK | W_OK) == 0)
179 *ttydev = strdup(tty_name); 231 {
180 return pfd; 232 *ttydev = strdup (tty_name);
181 } 233 return pfd;
182 close(pfd); 234 }
183 } 235
236 close (pfd);
237 }
238 }
184 } 239 }
185 }
186 }
187#endif 240#endif
241
188 return -1; 242 return -1;
243}
244
245static int
246get_pty (int *fd_tty, char **ttydev)
247{
248 int pfd;
249
250 if ((pfd = get_pty_streams (fd_tty, ttydev)) != -1
251 || (pfd = get_pty_openpty (fd_tty, ttydev)) != -1
252 || (pfd = get_pty__getpty (fd_tty, ttydev)) != -1
253 || (pfd = get_pty_ptc (fd_tty, ttydev)) != -1
254 || (pfd = get_pty_clone (fd_tty, ttydev)) != -1
255 || (pfd = get_pty_numeric (fd_tty, ttydev)) != -1
256 || (pfd = get_pty_searched (fd_tty, ttydev)) != -1)
257 return pfd;
258
259 return -1;
189} 260}
190 261
191/*----------------------------------------------------------------------*/ 262/*----------------------------------------------------------------------*/
192/* 263/*
193 * Returns tty file descriptor, or -1 on failure 264 * Returns tty file descriptor, or -1 on failure
194 */ 265 */
195/* EXTPROTO */ 266static int
196int
197rxvt_get_tty(const char *ttydev) 267get_tty (char *ttydev)
198{ 268{
199 return open(ttydev, O_RDWR | O_NOCTTY, 0); 269 return open (ttydev, O_RDWR | O_NOCTTY, 0);
200} 270}
201 271
202/*----------------------------------------------------------------------*/ 272/*----------------------------------------------------------------------*/
203/* 273/*
204 * Make our tty a controlling tty so that /dev/tty points to us 274 * Make our tty a controlling tty so that /dev/tty points to us
205 */ 275 */
206/* EXTPROTO */ 276static int
207int 277control_tty (int fd_tty)
208rxvt_control_tty(int fd_tty, const char *ttydev)
209{ 278{
210#ifndef __QNX__
211 int fd;
212
213 D_TTY((stderr, "rxvt_control_tty(): pid: %d, tty fd: %d, dev: %s", getpid(), fd_tty, ttydev));
214/* ---------------------------------------- */
215# ifdef HAVE_SETSID
216 setsid(); 279 setsid ();
280
281#if defined(PTYS_ARE_PTMX) && defined(I_PUSH)
282 /*
283 * Push STREAMS modules:
284 * ptem: pseudo-terminal hardware emulation module.
285 * ldterm: standard terminal line discipline.
286 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
287 *
288 * After we push the STREAMS modules, the first open () on the slave side
289 * (i.e. the next section between the dashes giving us "tty opened OK")
290 * should make the "ptem" (or "ldterm" depending upon either which OS
291 * version or which set of manual pages you have) module give us a
292 * controlling terminal. We must already have close ()d the master side
293 * fd in this child process before we push STREAMS modules on because the
294 * documentation is really unclear about whether it is any close () on
295 * the master side or the last close () - i.e. a proper STREAMS dismantling
296 * close () - on the master side which causes a hang up to be sent
297 * through - Geoff Wing
298 */
299# ifdef HAVE_ISASTREAM
300 if (isastream (fd_tty) == 1)
217# endif 301# endif
218# if defined(HAVE_SETPGID) 302 {
219 setpgid(0, 0); 303 ioctl (fd_tty, I_PUSH, "ptem");
220# elif defined(HAVE_SETPGRP) 304 ioctl (fd_tty, I_PUSH, "ldterm");
221 setpgrp(0, 0); 305 ioctl (fd_tty, I_PUSH, "ttcompat");
306 }
307#endif
308
309 ioctl (fd_tty, TIOCSCTTY, NULL);
310
311 int fd = open ("/dev/tty", O_WRONLY);
312 if (fd < 0)
313 return -1; /* fatal */
314
315 close (fd);
316
317 return 0;
318}
319
320void
321rxvt_ptytty::close_tty ()
322{
323 if (tty < 0)
324 return;
325
326 close (tty);
327 tty = -1;
328}
329
330bool
331rxvt_ptytty::make_controlling_tty ()
332{
333 return control_tty (tty) >= 0;
334}
335
336void
337rxvt_ptytty::set_utf8_mode (bool on)
338{
339#ifdef IUTF8
340 if (pty < 0)
341 return;
342
343 struct termios tio;
344
345 if (tcgetattr (pty, &tio) != -1)
346 {
347 tcflag_t new_cflag = tio.c_iflag;
348
349 if (on)
350 new_cflag |= IUTF8;
351 else
352 new_cflag &= ~IUTF8;
353
354 if (new_cflag != tio.c_iflag)
355 {
356 tio.c_iflag = new_cflag;
357 tcsetattr (pty, TCSANOW, &tio);
358 }
359 }
360#endif
361}
362
363/////////////////////////////////////////////////////////////////////////////
364
365#ifndef NO_SETOWNER_TTYDEV
366static struct ttyconf {
367 gid_t gid;
368 mode_t mode;
369
370 ttyconf ()
371 {
372#ifdef TTY_GID_SUPPORT
373 struct group *gr = getgrnam ("tty");
374
375 if (gr)
376 { /* change group ownership of tty to "tty" */
377 mode = S_IRUSR | S_IWUSR | S_IWGRP;
378 gid = gr->gr_gid;
379 }
380 else
381#endif /* TTY_GID_SUPPORT */
382 {
383 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
384 gid = getgid ();
385 }
386 }
387} ttyconf;
388
389/////////////////////////////////////////////////////////////////////////////
390
391void
392rxvt_ptytty_unix::privileges (rxvt_privaction action)
393{
394 if (!name || !*name)
395 return;
396
397 if (action == SAVE)
398 {
399# ifndef RESET_TTY_TO_COMMON_DEFAULTS
400 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
401 if (lstat (name, &savestat) < 0) /* you lose out */
402 ;
403 else
222# endif 404# endif
223/* ---------------------------------------- */ 405 {
224# ifdef TIOCNOTTY 406 saved = true;
225 fd = open("/dev/tty", O_RDWR | O_NOCTTY); 407 chown (name, getuid (), ttyconf.gid); /* fail silently */
226 D_TTY((stderr, "rxvt_control_tty(): Voiding tty associations: previous=%s", fd < 0 ? "no" : "yes")); 408 chmod (name, ttyconf.mode);
227 if (fd >= 0) { 409# ifdef HAVE_REVOKE
228 ioctl(fd, TIOCNOTTY, NULL); /* void tty associations */ 410 revoke (name);
229 close(fd);
230 }
231# endif 411# endif
232/* ---------------------------------------- */ 412 }
233 fd = open("/dev/tty", O_RDWR | O_NOCTTY); 413 }
234 D_TTY((stderr, "rxvt_control_tty(): /dev/tty has controlling tty? %s", fd < 0 ? "no (good)" : "yes (bad)")); 414 else
235 if (fd >= 0) 415 { /* action == RESTORE */
236 close(fd); /* ouch: still have controlling tty */ 416# ifndef RESET_TTY_TO_COMMON_DEFAULTS
237/* ---------------------------------------- */ 417 if (saved)
238#if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 418 {
239/* 419 chmod (name, savestat.st_mode);
240 * Push STREAMS modules: 420 chown (name, savestat.st_uid, savestat.st_gid);
241 * ptem: pseudo-terminal hardware emulation module. 421 }
242 * ldterm: standard terminal line discipline. 422# else
243 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 423 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
244 * 424 chown (name, 0, 0);
245 * After we push the STREAMS modules, the first open() on the slave side
246 * (i.e. the next section between the dashes giving us "tty opened OK")
247 * should make the "ptem" (or "ldterm" depending upon either which OS
248 * version or which set of manual pages you have) module give us a
249 * controlling terminal. We must already have close()d the master side
250 * fd in this child process before we push STREAMS modules on because the
251 * documentation is really unclear about whether it is any close() on
252 * the master side or the last close() - i.e. a proper STREAMS dismantling
253 * close() - on the master side which causes a hang up to be sent
254 * through - Geoff Wing
255 */
256# ifdef HAVE_ISASTREAM
257 if (isastream(fd_tty) == 1)
258# endif 425# endif
259 { 426 }
260 D_TTY((stderr, "rxvt_control_tty(): Pushing STREAMS modules")); 427}
261 ioctl(fd_tty, I_PUSH, "ptem");
262 ioctl(fd_tty, I_PUSH, "ldterm");
263 ioctl(fd_tty, I_PUSH, "ttcompat");
264 }
265#endif
266/* ---------------------------------------- */
267# if defined(TIOCSCTTY)
268 fd = ioctl(fd_tty, TIOCSCTTY, NULL);
269 D_TTY((stderr, "rxvt_control_tty(): ioctl(..,TIOCSCTTY): %d", fd));
270# elif defined(TIOCSETCTTY)
271 fd = ioctl(fd_tty, TIOCSETCTTY, NULL);
272 D_TTY((stderr, "rxvt_control_tty(): ioctl(..,TIOCSETCTTY): %d", fd));
273# else
274 fd = open(ttydev, O_RDWR);
275 D_TTY((stderr, "rxvt_control_tty(): tty open%s", fd < 0 ? " failure" : "ed OK"));
276 if (fd >= 0)
277 close(fd);
278# endif 428#endif
279/* ---------------------------------------- */ 429
280 fd = open("/dev/tty", O_WRONLY); 430rxvt_ptytty_unix::rxvt_ptytty_unix ()
281 D_TTY((stderr, "rxvt_control_tty(): do we have controlling tty now: %s", fd < 0 ? "no (fatal)" : "yes (good)")); 431{
432 pty = tty = -1;
433 name = 0;
434#ifndef NO_SETOWNER_TTYDEV
435 saved = false;
436#endif
437#if UTMP_SUPPORT
438 cmd_pid = 0;
439#endif
440}
441
442rxvt_ptytty_unix::~rxvt_ptytty_unix ()
443{
444#if UTMP_SUPPORT
445 logout ();
446#endif
447 put ();
448}
449
450void
451rxvt_ptytty_unix::put ()
452{
453#ifndef NO_SETOWNER_TTYDEV
454 privileges (RESTORE);
455#endif
456
457 if (pty >= 0) close (pty);
458 close_tty ();
459 free (name);
460
461 pty = tty = -1;
462 name = 0;
463}
464
465bool
466rxvt_ptytty_unix::get ()
467{
468 /* get master (pty) */
469 if ((pty = get_pty (&tty, &name)) < 0)
470 return false;
471
472 fcntl (pty, F_SETFL, O_NONBLOCK);
473
474 /* get slave (tty) */
475 if (tty < 0)
476 {
477#ifndef NO_SETOWNER_TTYDEV
478 privileges (SAVE);
479#endif
480
481 if ((tty = get_tty (name)) < 0)
482 {
483 put ();
484 return false;
485 }
486 }
487
488 return true;
489}
490
491#if PTYTTY_HELPER
492
493static int sock_fd;
494static int pid;
495
496struct command
497{
498 enum { get, login, destroy } type;
499
500 rxvt_ptytty *id;
501
502 bool login_shell;
503 int cmd_pid;
504 char hostname[512]; // arbitrary, but should be plenty
505};
506
507struct rxvt_ptytty_proxy : zero_initialized, rxvt_ptytty
508{
509 rxvt_ptytty *id;
510
511 ~rxvt_ptytty_proxy ();
512
513 bool get ();
514 void login (int cmd_pid, bool login_shell, const char *hostname);
515};
516
517bool
518rxvt_ptytty_proxy::get ()
519{
520 command cmd;
521
522 cmd.type = command::get;
523
524 write (sock_fd, &cmd, sizeof (cmd));
525
526 if (read (sock_fd, &id, sizeof (id)) != sizeof (id))
527 rxvt_fatal ("protocol error while creating pty using helper process, aborting.\n");
528
529 if (!id)
530 return false;
531
532 if ((pty = rxvt_recv_fd (sock_fd)) < 0
533 || (tty = rxvt_recv_fd (sock_fd)) < 0)
534 rxvt_fatal ("protocol error while reading pty/tty fds from helper process, aborting.\n");
535
536 return true;
537}
538
539void
540rxvt_ptytty_proxy::login (int cmd_pid, bool login_shell, const char *hostname)
541{
542 command cmd;
543
544 cmd.type = command::login;
545 cmd.id = id;
546 cmd.cmd_pid = cmd_pid;
547 cmd.login_shell = login_shell;
548 strncpy (cmd.hostname, hostname, sizeof (cmd.hostname));
549
550 write (sock_fd, &cmd, sizeof (cmd));
551}
552
553rxvt_ptytty_proxy::~rxvt_ptytty_proxy ()
554{
555 command cmd;
556
557 cmd.type = command::destroy;
558 cmd.id = id;
559
560 write (sock_fd, &cmd, sizeof (cmd));
561}
562
563static
564void serve ()
565{
566 command cmd;
567 vector<rxvt_ptytty *> ptys;
568
569 while (read (sock_fd, &cmd, sizeof (command)) == sizeof (command))
570 {
571 if (cmd.type == command::get)
572 {
573 // -> id ptyfd ttyfd
574 cmd.id = new rxvt_ptytty_unix;
575
576 if (cmd.id->get ())
577 {
578 write (sock_fd, &cmd.id, sizeof (cmd.id));
579 ptys.push_back (cmd.id);
580
581 rxvt_send_fd (sock_fd, cmd.id->pty);
582 rxvt_send_fd (sock_fd, cmd.id->tty);
583 }
584 else
585 {
586 delete cmd.id;
587 cmd.id = 0;
588 write (sock_fd, &cmd.id, sizeof (cmd.id));
589 }
590 }
591 else if (cmd.type == command::login)
592 {
593#if UTMP_SUPPORT
594 if (find (ptys.begin (), ptys.end (), cmd.id))
595 {
596 cmd.hostname[sizeof (cmd.hostname) - 1] = 0;
597 cmd.id->login (cmd.cmd_pid, cmd.login_shell, cmd.hostname);
598 }
599#endif
600 }
601 else if (cmd.type == command::destroy)
602 {
603 rxvt_ptytty **pty = find (ptys.begin (), ptys.end (), cmd.id);
604
605 if (pty)
606 {
607 delete *pty;
608 ptys.erase (pty);
609 }
610 }
611 else
612 break;
613 }
614
615 // destroy all ptys
616 for (rxvt_ptytty **i = ptys.end (); i-- > ptys.begin (); )
617 delete *i;
618}
619
620void rxvt_ptytty_server ()
621{
622 int sv[2];
623
624 if (socketpair (AF_UNIX, SOCK_STREAM, 0, sv))
625 rxvt_fatal ("could not create socket to communicate with pty/sessiondb helper, aborting.\n");
626
627 pid = fork ();
628
282 if (fd < 0) 629 if (pid < 0)
283 return -1; /* fatal */ 630 rxvt_fatal ("could not create pty/sessiondb helper process, aborting.\n");
631
632 if (pid)
633 {
634 // client, urxvt
635 sock_fd = sv[0];
636 close (sv[1]);
637 fcntl (sock_fd, F_SETFD, FD_CLOEXEC);
638 }
639 else
640 {
641 // server, pty-helper
642 sock_fd = sv[1];
643
644 for (int fd = 0; fd < 1023; fd++)
645 if (fd != sock_fd)
284 close(fd); 646 close (fd);
285/* ---------------------------------------- */ 647
286 D_TTY((stderr, "rxvt_control_tty(): tcgetpgrp(): %d getpgrp(): %d", tcgetpgrp(fd_tty), getpgrp())); 648 serve ();
287/* ---------------------------------------- */ 649 _exit (EXIT_SUCCESS);
288#endif /* ! __QNX__ */ 650 }
289 return 0;
290} 651}
652#endif
653
654// a "factory" *g*
655rxvt_ptytty *
656rxvt_new_ptytty ()
657{
658#if PTYTTY_HELPER
659 if (pid > 0)
660 // use helper process
661 return new rxvt_ptytty_proxy;
662 else
663#endif
664 return new rxvt_ptytty_unix;
665}
666
291/*----------------------- end-of-file (C source) -----------------------*/ 667/*----------------------- end-of-file (C source) -----------------------*/
668

Diff Legend

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