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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.2 by pcg, Mon Nov 24 17:31:27 2003 UTC vs.
Revision 1.41 by root, Tue Jan 17 15:41:33 2006 UTC

1/*--------------------------------*-C-*---------------------------------* 1/*--------------------------------*-C-*---------------------------------*
2 * File: ptytty.c 2 * File: ptytty.C
3 *----------------------------------------------------------------------* 3 *----------------------------------------------------------------------*
4 * $Id: ptytty.C,v 1.2 2003/11/24 17:31:27 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 int
69int
70rxvt_get_pty(int *fd_tty, const char **ttydev) 70get_pty (int *fd_tty, char **ttydev)
71{ 71{
72 int pfd; 72 int pfd;
73 73
74#ifdef PTYS_ARE_OPENPTY 74#ifdef PTYS_ARE_OPENPTY
75 char tty_name[sizeof "/dev/pts/????\0"]; 75 char tty_name[sizeof "/dev/pts/????\0"];
76 76
77 if (openpty(&pfd, fd_tty, tty_name, NULL, NULL) != -1) { 77 int res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
78
79 if (res != -1)
80 {
78 *ttydev = strdup(tty_name); 81 *ttydev = strdup (tty_name);
79 return pfd; 82 return pfd;
80 } 83 }
81#endif 84#endif
82 85
83#ifdef PTYS_ARE__GETPTY 86#ifdef PTYS_ARE__GETPTY
84 *ttydev = _getpty(&pfd, O_RDWR | O_NDELAY | O_NOCTTY, 0622, 0); 87 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
85 if (*ttydev != NULL) 88 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; 89 return pfd;
96 }
97#endif 90#endif
98 91
99#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT) 92#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
100# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_PTMX) 93# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_POSIX) || defined(PTYS_ARE_PTMX)
94
101 { 95 {
102# ifdef PTYS_ARE_GETPT 96# ifdef PTYS_ARE_GETPT
103 pfd = getpt(); 97 pfd = getpt();
104# else 98# else
99# ifdef PTYS_ARE_POSIX
100 pfd = posix_openpt (O_RDWR);
101# else
105 pfd = open("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 102 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
106# endif 103# endif
104# endif
105
107 if (pfd >= 0) { 106 if (pfd >= 0)
107 {
108 if (grantpt(pfd) == 0 /* change slave permissions */ 108 if (grantpt (pfd) == 0 /* change slave permissions */
109 && unlockpt(pfd) == 0) { /* slave now unlocked */ 109 && unlockpt (pfd) == 0)
110 { /* slave now unlocked */
110 *ttydev = ptsname(pfd); /* get slave's name */ 111 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
111 return pfd; 112 return pfd;
112 } 113 }
113 close(pfd); 114 close (pfd);
114 }
115 } 115 }
116 }
116# endif 117# endif
117#endif 118#endif
118 119
119#ifdef PTYS_ARE_PTC 120#ifdef PTYS_ARE_PTC
120 if ((pfd = open("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) { 121 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
121 *ttydev = ttyname(pfd); 122 {
123 *ttydev = strdup (ttyname (pfd));
122 return pfd; 124 return pfd;
123 } 125 }
124#endif 126#endif
125 127
126#ifdef PTYS_ARE_CLONE 128#ifdef PTYS_ARE_CLONE
127 if ((pfd = open("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) { 129 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
128 *ttydev = ptsname(pfd); 130 {
131 *ttydev = strdup (ptsname (pfd));
129 return pfd; 132 return pfd;
130 } 133 }
131#endif 134#endif
132 135
133#ifdef PTYS_ARE_NUMERIC 136#ifdef PTYS_ARE_NUMERIC
134 { 137 {
135 int idx; 138 int idx;
136 char *c1, *c2; 139 char *c1, *c2;
137 char pty_name[] = "/dev/ptyp???"; 140 char pty_name[] = "/dev/ptyp???";
138 char tty_name[] = "/dev/ttyp???"; 141 char tty_name[] = "/dev/ttyp???";
139 142
140 c1 = &(pty_name[sizeof(pty_name) - 4]); 143 c1 = &(pty_name[sizeof (pty_name) - 4]);
141 c2 = &(tty_name[sizeof(tty_name) - 4]); 144 c2 = &(tty_name[sizeof (tty_name) - 4]);
142 for (idx = 0; idx < 256; idx++) { 145 for (idx = 0; idx < 256; idx++)
146 {
143 sprintf(c1, "%d", idx); 147 sprintf (c1, "%d", idx);
144 sprintf(c2, "%d", idx); 148 sprintf (c2, "%d", idx);
145 if (access(tty_name, F_OK) < 0) { 149 if (access (tty_name, F_OK) < 0)
146 idx = 256; 150 {
147 break; 151 idx = 256;
148 } 152 break;
153 }
154
149 if ((pfd = open(pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) { 155 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
156 {
150 if (access(tty_name, R_OK | W_OK) == 0) { 157 if (access (tty_name, R_OK | W_OK) == 0)
158 {
151 *ttydev = strdup(tty_name); 159 *ttydev = strdup (tty_name);
152 return pfd; 160 return pfd;
153 } 161 }
154 close(pfd); 162
155 } 163 close (pfd);
156 } 164 }
157 } 165 }
166 }
158#endif 167#endif
168
159#ifdef PTYS_ARE_SEARCHED 169#ifdef PTYS_ARE_SEARCHED
160 { 170 {
161 const char *c1, *c2; 171 const char *c1, *c2;
162 char pty_name[] = "/dev/pty??"; 172 char pty_name[] = "/dev/pty??";
163 char tty_name[] = "/dev/tty??"; 173 char tty_name[] = "/dev/tty??";
164 174
165# ifndef PTYCHAR1 175# ifndef PTYCHAR1
166# define PTYCHAR1 "pqrstuvwxyz" 176# define PTYCHAR1 "pqrstuvwxyz"
167# endif 177# endif
168# ifndef PTYCHAR2 178# ifndef PTYCHAR2
169# define PTYCHAR2 "0123456789abcdef" 179# define PTYCHAR2 "0123456789abcdef"
170# endif 180# endif
181
171 for (c1 = PTYCHAR1; *c1; c1++) { 182 for (c1 = PTYCHAR1; *c1; c1++)
183 {
172 pty_name[(sizeof(pty_name) - 3)] = 184 pty_name[ (sizeof (pty_name) - 3)] =
173 tty_name[(sizeof(pty_name) - 3)] = *c1; 185 tty_name[ (sizeof (pty_name) - 3)] = *c1;
174 for (c2 = PTYCHAR2; *c2; c2++) { 186 for (c2 = PTYCHAR2; *c2; c2++)
187 {
175 pty_name[(sizeof(pty_name) - 2)] = 188 pty_name[ (sizeof (pty_name) - 2)] =
176 tty_name[(sizeof(pty_name) - 2)] = *c2; 189 tty_name[ (sizeof (pty_name) - 2)] = *c2;
177 if ((pfd = open(pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) { 190 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
191 {
178 if (access(tty_name, R_OK | W_OK) == 0) { 192 if (access (tty_name, R_OK | W_OK) == 0)
179 *ttydev = strdup(tty_name); 193 {
180 return pfd; 194 *ttydev = strdup (tty_name);
181 } 195 return pfd;
182 close(pfd); 196 }
183 } 197
184 } 198 close (pfd);
185 } 199 }
200 }
186 } 201 }
202 }
187#endif 203#endif
204
188 return -1; 205 return -1;
189} 206}
190 207
191/*----------------------------------------------------------------------*/ 208/*----------------------------------------------------------------------*/
192/* 209/*
193 * Returns tty file descriptor, or -1 on failure 210 * Returns tty file descriptor, or -1 on failure
194 */ 211 */
195/* EXTPROTO */ 212static int
196int
197rxvt_get_tty(const char *ttydev) 213get_tty (char *ttydev)
198{ 214{
199 return open(ttydev, O_RDWR | O_NOCTTY, 0); 215 return open (ttydev, O_RDWR | O_NOCTTY, 0);
200} 216}
201 217
202/*----------------------------------------------------------------------*/ 218/*----------------------------------------------------------------------*/
203/* 219/*
204 * Make our tty a controlling tty so that /dev/tty points to us 220 * Make our tty a controlling tty so that /dev/tty points to us
205 */ 221 */
206/* EXTPROTO */ 222static int
207int 223control_tty (int fd_tty)
208rxvt_control_tty(int fd_tty, const char *ttydev)
209{ 224{
210#ifndef __QNX__ 225 int fd;
211 int fd;
212 226
213 D_TTY((stderr, "rxvt_control_tty(): pid: %d, tty fd: %d, dev: %s", getpid(), fd_tty, ttydev));
214/* ---------------------------------------- */ 227 /* ---------------------------------------- */
215# ifdef HAVE_SETSID
216 setsid(); 228 setsid ();
229
230 /* ---------------------------------------- */
231# if defined(PTYS_ARE_PTMX) && defined(I_PUSH)
232 /*
233 * Push STREAMS modules:
234 * ptem: pseudo-terminal hardware emulation module.
235 * ldterm: standard terminal line discipline.
236 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
237 *
238 * After we push the STREAMS modules, the first open () on the slave side
239 * (i.e. the next section between the dashes giving us "tty opened OK")
240 * should make the "ptem" (or "ldterm" depending upon either which OS
241 * version or which set of manual pages you have) module give us a
242 * controlling terminal. We must already have close ()d the master side
243 * fd in this child process before we push STREAMS modules on because the
244 * documentation is really unclear about whether it is any close () on
245 * the master side or the last close () - i.e. a proper STREAMS dismantling
246 * close () - on the master side which causes a hang up to be sent
247 * through - Geoff Wing
248 */
249# ifdef HAVE_ISASTREAM
250 if (isastream (fd_tty) == 1)
251# endif
252 {
253 ioctl (fd_tty, I_PUSH, "ptem");
254 ioctl (fd_tty, I_PUSH, "ldterm");
255 ioctl (fd_tty, I_PUSH, "ttcompat");
256 }
217# endif 257# endif
218# if defined(HAVE_SETPGID) 258 /* ---------------------------------------- */
219 setpgid(0, 0); 259 fd = ioctl (fd_tty, TIOCSCTTY, NULL);
220# elif defined(HAVE_SETPGRP) 260 /* ---------------------------------------- */
221 setpgrp(0, 0); 261 fd = open ("/dev/tty", O_WRONLY);
262 if (fd < 0)
263 return -1; /* fatal */
264 close (fd);
265 /* ---------------------------------------- */
266
267 return 0;
268}
269
270void
271rxvt_ptytty::close_tty ()
272{
273 if (tty < 0)
274 return;
275
276 close (tty);
277 tty = -1;
278}
279
280bool
281rxvt_ptytty::make_controlling_tty ()
282{
283 return control_tty (tty) >= 0;
284}
285
286void
287rxvt_ptytty::set_utf8_mode (bool on)
288{
289#ifdef IUTF8
290 if (pty < 0)
291 return;
292
293 struct termios tio;
294
295 if (tcgetattr (pty, &tio) != -1)
296 {
297 tcflag_t new_cflag = tio.c_iflag;
298
299 if (on)
300 new_cflag |= IUTF8;
301 else
302 new_cflag &= ~IUTF8;
303
304 if (new_cflag != tio.c_iflag)
305 {
306 tio.c_iflag = new_cflag;
307 tcsetattr (pty, TCSANOW, &tio);
308 }
309 }
310#endif
311}
312
313/////////////////////////////////////////////////////////////////////////////
314
315#ifndef NO_SETOWNER_TTYDEV
316static struct ttyconf {
317 gid_t gid;
318 mode_t mode;
319
320 ttyconf ()
321 {
322#ifdef TTY_GID_SUPPORT
323 struct group *gr = getgrnam ("tty");
324
325 if (gr)
326 { /* change group ownership of tty to "tty" */
327 mode = S_IRUSR | S_IWUSR | S_IWGRP;
328 gid = gr->gr_gid;
329 }
330 else
331#endif /* TTY_GID_SUPPORT */
332 {
333 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
334 gid = getgid ();
335 }
336 }
337} ttyconf;
338
339/////////////////////////////////////////////////////////////////////////////
340
341void
342rxvt_ptytty_unix::privileges (rxvt_privaction action)
343{
344 if (!name || !*name)
345 return;
346
347 if (action == SAVE)
348 {
349# ifndef RESET_TTY_TO_COMMON_DEFAULTS
350 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
351 if (lstat (name, &savestat) < 0) /* you lose out */
352 ;
353 else
222# endif 354# endif
223/* ---------------------------------------- */ 355 {
224# ifdef TIOCNOTTY 356 saved = true;
225 fd = open("/dev/tty", O_RDWR | O_NOCTTY); 357 chown (name, getuid (), ttyconf.gid); /* fail silently */
226 D_TTY((stderr, "rxvt_control_tty(): Voiding tty associations: previous=%s", fd < 0 ? "no" : "yes")); 358 chmod (name, ttyconf.mode);
227 if (fd >= 0) { 359# ifdef HAVE_REVOKE
228 ioctl(fd, TIOCNOTTY, NULL); /* void tty associations */ 360 revoke (name);
229 close(fd);
230 }
231# endif 361# endif
232/* ---------------------------------------- */ 362 }
233 fd = open("/dev/tty", O_RDWR | O_NOCTTY); 363 }
234 D_TTY((stderr, "rxvt_control_tty(): /dev/tty has controlling tty? %s", fd < 0 ? "no (good)" : "yes (bad)")); 364 else
235 if (fd >= 0) 365 { /* action == RESTORE */
236 close(fd); /* ouch: still have controlling tty */ 366# ifndef RESET_TTY_TO_COMMON_DEFAULTS
237/* ---------------------------------------- */ 367 if (saved)
238#if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 368 {
239/* 369 chmod (name, savestat.st_mode);
240 * Push STREAMS modules: 370 chown (name, savestat.st_uid, savestat.st_gid);
241 * ptem: pseudo-terminal hardware emulation module. 371 }
242 * ldterm: standard terminal line discipline. 372# else
243 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 373 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
244 * 374 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 375# endif
376
259 { 377 }
260 D_TTY((stderr, "rxvt_control_tty(): Pushing STREAMS modules")); 378}
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 379#endif
279/* ---------------------------------------- */ 380
280 fd = open("/dev/tty", O_WRONLY); 381rxvt_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)")); 382{
383 pty = tty = -1;
384 name = 0;
385#ifndef NO_SETOWNER_TTYDEV
386 saved = false;
387#endif
388#if UTMP_SUPPORT
389 cmd_pid = 0;
390#endif
391}
392
393rxvt_ptytty_unix::~rxvt_ptytty_unix ()
394{
395 logout ();
396 put ();
397}
398
399void
400rxvt_ptytty_unix::put ()
401{
402#ifndef NO_SETOWNER_TTYDEV
403 privileges (RESTORE);
404#endif
405
406 if (pty >= 0) close (pty);
407 close_tty ();
408 free (name);
409
410 pty = tty = -1;
411 name = 0;
412}
413
414bool
415rxvt_ptytty_unix::get ()
416{
417 /* get master (pty) */
418 if ((pty = get_pty (&tty, &name)) < 0)
419 return false;
420
421 fcntl (pty, F_SETFL, O_NONBLOCK);
422
423 /* get slave (tty) */
424 if (tty < 0)
425 {
426#ifndef NO_SETOWNER_TTYDEV
427 privileges (SAVE);
428#endif
429
430 if ((tty = get_tty (name)) < 0)
431 {
432 put ();
433 return false;
434 }
435 }
436
437 return true;
438}
439
440#if PTYTTY_HELPER
441
442static int sock_fd;
443static int pid;
444
445struct command
446{
447 enum { get, login, destroy } type;
448
449 rxvt_ptytty *id;
450
451 bool login_shell;
452 int cmd_pid;
453 char hostname[512]; // arbitrary, but should be plenty
454};
455
456struct rxvt_ptytty_proxy : zero_initialized, rxvt_ptytty
457{
458 rxvt_ptytty *id;
459
460 ~rxvt_ptytty_proxy ();
461
462 bool get ();
463 void login (int cmd_pid, bool login_shell, const char *hostname);
464};
465
466bool
467rxvt_ptytty_proxy::get ()
468{
469 command cmd;
470
471 cmd.type = command::get;
472
473 write (sock_fd, &cmd, sizeof (cmd));
474
475 if (read (sock_fd, &id, sizeof (id)) != sizeof (id))
476 rxvt_fatal ("protocol error while creating pty using helper process, aborting.\n");
477
478 if (!id)
479 return false;
480
481 if ((pty = rxvt_recv_fd (sock_fd)) < 0
482 || (tty = rxvt_recv_fd (sock_fd)) < 0)
483 rxvt_fatal ("protocol error while reading pty/tty fds from helper process, aborting.\n");
484
485 return true;
486}
487
488void
489rxvt_ptytty_proxy::login (int cmd_pid, bool login_shell, const char *hostname)
490{
491 command cmd;
492
493 cmd.type = command::login;
494 cmd.id = id;
495 cmd.cmd_pid = cmd_pid;
496 cmd.login_shell = login_shell;
497 strncpy (cmd.hostname, hostname, sizeof (cmd.hostname));
498
499 write (sock_fd, &cmd, sizeof (cmd));
500}
501
502rxvt_ptytty_proxy::~rxvt_ptytty_proxy ()
503{
504 command cmd;
505
506 cmd.type = command::destroy;
507 cmd.id = id;
508
509 write (sock_fd, &cmd, sizeof (cmd));
510}
511
512static
513void serve ()
514{
515 command cmd;
516 vector<rxvt_ptytty *> ptys;
517
518 while (read (sock_fd, &cmd, sizeof (command)) == sizeof (command))
519 {
520 if (cmd.type == command::get)
521 {
522 // -> id ptyfd ttyfd
523 cmd.id = new rxvt_ptytty_unix;
524
525 if (cmd.id->get ())
526 {
527 write (sock_fd, &cmd.id, sizeof (cmd.id));
528 ptys.push_back (cmd.id);
529
530 rxvt_send_fd (sock_fd, cmd.id->pty);
531 rxvt_send_fd (sock_fd, cmd.id->tty);
532 }
533 else
534 {
535 delete cmd.id;
536 cmd.id = 0;
537 write (sock_fd, &cmd.id, sizeof (cmd.id));
538 }
539 }
540 else if (cmd.type == command::login)
541 {
542 if (find (ptys.begin (), ptys.end (), cmd.id))
543 {
544 cmd.hostname[sizeof (cmd.hostname) - 1] = 0;
545 cmd.id->login (cmd.cmd_pid, cmd.login_shell, cmd.hostname);
546 }
547 }
548 else if (cmd.type == command::destroy)
549 {
550 rxvt_ptytty **pty = find (ptys.begin (), ptys.end (), cmd.id);
551
552 if (*pty)
553 {
554 ptys.erase (pty);
555 delete *pty;
556 }
557 }
558 else
559 break;
560 }
561
562 // destroy all ptys
563 for (rxvt_ptytty **i = ptys.end (); i-- > ptys.begin (); )
564 delete *i;
565}
566
567void rxvt_ptytty_server ()
568{
569 int sv[2];
570
571 if (socketpair (AF_UNIX, SOCK_STREAM, 0, sv))
572 rxvt_fatal ("could not create socket to communicate with pty/sessiondb helper, aborting.\n");
573
574 pid = fork ();
575
282 if (fd < 0) 576 if (pid < 0)
283 return -1; /* fatal */ 577 rxvt_fatal ("could not create pty/sessiondb helper process, aborting.\n");
578
579 if (pid)
580 {
581 // client, urxvt
582 sock_fd = sv[0];
583 close (sv[1]);
584 fcntl (sock_fd, F_SETFD, FD_CLOEXEC);
585 }
586 else
587 {
588 setgid (getegid ());
589 setuid (geteuid ());
590
591 // server, pty-helper
592 sock_fd = sv[1];
593
594 for (int fd = 0; fd < 1023; fd++)
595 if (fd != sock_fd)
284 close(fd); 596 close (fd);
285/* ---------------------------------------- */ 597
286 D_TTY((stderr, "rxvt_control_tty(): tcgetpgrp(): %d getpgrp(): %d", tcgetpgrp(fd_tty), getpgrp())); 598 serve ();
287/* ---------------------------------------- */ 599 _exit (EXIT_SUCCESS);
288#endif /* ! __QNX__ */ 600 }
289 return 0;
290} 601}
602#endif
603
604// a "factory" *g*
605rxvt_ptytty *
606rxvt_new_ptytty ()
607{
608#if PTYTTY_HELPER
609 if (pid > 0)
610 // use helper process
611 return new rxvt_ptytty_proxy;
612 else
613#endif
614 return new rxvt_ptytty_unix;
615}
616
291/*----------------------- end-of-file (C source) -----------------------*/ 617/*----------------------- end-of-file (C source) -----------------------*/
618

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