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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 1.48 by ayin, Thu Jan 19 10:44:44 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#ifdef NO_SETOWNER_TTYDEV
79 int pfd; 73 int pfd;
80 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{
81#ifdef PTYS_ARE_OPENPTY 101#ifdef PTYS_ARE_OPENPTY
82 102 int pfd;
103 int res;
83 char tty_name[sizeof "/dev/pts/????\0"]; 104 char tty_name[sizeof "/dev/pts/????\0"];
84 105
85 if (openpty (&pfd, fd_tty, tty_name, NULL, NULL) != -1) 106 res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
107 if (res != -1)
86 { 108 {
87 *ttydev = strdup (tty_name); 109 *ttydev = strdup (tty_name);
88 return pfd; 110 return pfd;
89 } 111 }
90#endif 112#endif
91 113
114 return -1;
115}
116
117static inline int
118get_pty__getpty (int *fd_tty, char **ttydev)
119{
92#ifdef PTYS_ARE__GETPTY 120#ifdef PTYS_ARE__GETPTY
121 int pfd;
122
93 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); 123 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
94 if (*ttydev != NULL) 124 if (*ttydev != NULL)
95 return pfd; 125 return pfd;
96#endif 126#endif
97 127
98#ifdef PTYS_ARE_GETPTY 128 return -1;
129}
99 130
100 char *ptydev; 131static inline int
101 132get_pty_ptc (int *fd_tty, char **ttydev)
102 while ((ptydev = getpty ()) != NULL) 133{
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 134#ifdef PTYS_ARE_PTC
135 int pfd;
136
136 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) 137 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
137 { 138 {
138 *ttydev = ttyname (pfd); 139 *ttydev = strdup (ttyname (pfd));
139 return pfd; 140 return pfd;
140 } 141 }
141#endif 142#endif
142 143
144 return -1;
145}
146
147static inline int
148get_pty_clone (int *fd_tty, char **ttydev)
149{
143#ifdef PTYS_ARE_CLONE 150#ifdef PTYS_ARE_CLONE
151 int pfd;
152
144 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)
145 { 154 {
146 *ttydev = ptsname (pfd); 155 *ttydev = strdup (ptsname (pfd));
147 return pfd; 156 return pfd;
148 } 157 }
149#endif 158#endif
150 159
160 return -1;
161}
162
163static inline int
164get_pty_numeric (int *fd_tty, char **ttydev)
165{
151#ifdef PTYS_ARE_NUMERIC 166#ifdef PTYS_ARE_NUMERIC
152 { 167 int pfd;
153 int idx; 168 int idx;
154 char *c1, *c2; 169 char *c1, *c2;
155 char pty_name[] = "/dev/ptyp???"; 170 char pty_name[] = "/dev/ptyp???";
156 char tty_name[] = "/dev/ttyp???"; 171 char tty_name[] = "/dev/ttyp???";
157 172
158 c1 = & (pty_name[sizeof (pty_name) - 4]); 173 c1 = &(pty_name[sizeof (pty_name) - 4]);
159 c2 = & (tty_name[sizeof (tty_name) - 4]); 174 c2 = &(tty_name[sizeof (tty_name) - 4]);
175
160 for (idx = 0; idx < 256; idx++) 176 for (idx = 0; idx < 256; idx++)
161 { 177 {
162 sprintf (c1, "%d", idx); 178 sprintf (c1, "%d", idx);
163 sprintf (c2, "%d", idx); 179 sprintf (c2, "%d", idx);
180
164 if (access (tty_name, F_OK) < 0) 181 if (access (tty_name, F_OK) < 0)
165 { 182 {
166 idx = 256; 183 idx = 256;
167 break; 184 break;
168 } 185 }
186
169 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 187 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
170 { 188 {
171 if (access (tty_name, R_OK | W_OK) == 0) 189 if (access (tty_name, R_OK | W_OK) == 0)
172 { 190 {
173 *ttydev = strdup (tty_name); 191 *ttydev = strdup (tty_name);
174 return pfd; 192 return pfd;
175 } 193 }
194
176 close (pfd); 195 close (pfd);
177 } 196 }
178 } 197 }
179 }
180#endif 198#endif
199
200 return -1;
201}
202
203static inline int
204get_pty_searched (int *fd_tty, char **ttydev)
205{
181#ifdef PTYS_ARE_SEARCHED 206#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 207# ifndef PTYCHAR1
188# define PTYCHAR1 "pqrstuvwxyz" 208# define PTYCHAR1 "pqrstuvwxyz"
189# endif 209# endif
190# ifndef PTYCHAR2 210# ifndef PTYCHAR2
191# define PTYCHAR2 "0123456789abcdef" 211# define PTYCHAR2 "0123456789abcdef"
192# endif 212# endif
213 int pfd;
214 const char *c1, *c2;
215 char pty_name[] = "/dev/pty??";
216 char tty_name[] = "/dev/tty??";
193 217
194 for (c1 = PTYCHAR1; *c1; c1++) 218 for (c1 = PTYCHAR1; *c1; c1++)
195 { 219 {
196 pty_name[ (sizeof (pty_name) - 3)] = 220 pty_name[ (sizeof (pty_name) - 3)] =
197 tty_name[ (sizeof (pty_name) - 3)] = *c1; 221 tty_name[ (sizeof (pty_name) - 3)] = *c1;
222
198 for (c2 = PTYCHAR2; *c2; c2++) 223 for (c2 = PTYCHAR2; *c2; c2++)
199 { 224 {
200 pty_name[ (sizeof (pty_name) - 2)] = 225 pty_name[ (sizeof (pty_name) - 2)] =
201 tty_name[ (sizeof (pty_name) - 2)] = *c2; 226 tty_name[ (sizeof (pty_name) - 2)] = *c2;
227
202 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 228 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
203 { 229 {
204 if (access (tty_name, R_OK | W_OK) == 0) 230 if (access (tty_name, R_OK | W_OK) == 0)
205 { 231 {
206 *ttydev = strdup (tty_name); 232 *ttydev = strdup (tty_name);
207 return pfd; 233 return pfd;
208 } 234 }
235
209 close (pfd); 236 close (pfd);
210 } 237 }
211 } 238 }
212 } 239 }
213 }
214#endif 240#endif
241
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
215 return -1; 259 return -1;
216} 260}
217 261
218/*----------------------------------------------------------------------*/ 262/*----------------------------------------------------------------------*/
219/* 263/*
220 * Returns tty file descriptor, or -1 on failure 264 * Returns tty file descriptor, or -1 on failure
221 */ 265 */
222/* EXTPROTO */ 266static int
223int
224rxvt_get_tty (const char *ttydev) 267get_tty (char *ttydev)
225{ 268{
226 return open (ttydev, O_RDWR | O_NOCTTY, 0); 269 return open (ttydev, O_RDWR | O_NOCTTY, 0);
227} 270}
228 271
229/*----------------------------------------------------------------------*/ 272/*----------------------------------------------------------------------*/
230/* 273/*
231 * 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
232 */ 275 */
233/* EXTPROTO */ 276static int
234int 277control_tty (int fd_tty)
235rxvt_control_tty (int fd_tty, const char *ttydev)
236{ 278{
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 (); 279 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
252 280
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) 281#if defined(PTYS_ARE_PTMX) && defined(I_PUSH)
268 /* 282 /*
269 * Push STREAMS modules: 283 * Push STREAMS modules:
270 * ptem: pseudo-terminal hardware emulation module. 284 * ptem: pseudo-terminal hardware emulation module.
271 * ldterm: standard terminal line discipline. 285 * ldterm: standard terminal line discipline.
… …
284 */ 298 */
285# ifdef HAVE_ISASTREAM 299# ifdef HAVE_ISASTREAM
286 if (isastream (fd_tty) == 1) 300 if (isastream (fd_tty) == 1)
287# endif 301# endif
288 { 302 {
289 D_TTY ((stderr, "rxvt_control_tty (): Pushing STREAMS modules"));
290 ioctl (fd_tty, I_PUSH, "ptem"); 303 ioctl (fd_tty, I_PUSH, "ptem");
291 ioctl (fd_tty, I_PUSH, "ldterm"); 304 ioctl (fd_tty, I_PUSH, "ldterm");
292 ioctl (fd_tty, I_PUSH, "ttcompat"); 305 ioctl (fd_tty, I_PUSH, "ttcompat");
293 } 306 }
294#endif 307#endif
295 /* ---------------------------------------- */ 308
296# if defined(TIOCSCTTY)
297 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 309 ioctl (fd_tty, TIOCSCTTY, NULL);
298 D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSCTTY): %d", fd)); 310
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); 311 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) 312 if (fd < 0)
312 return -1; /* fatal */ 313 return -1; /* fatal */
314
313 close (fd); 315 close (fd);
314 /* ---------------------------------------- */
315 D_TTY ((stderr, "rxvt_control_tty (): tcgetpgrp (): %d getpgrp (): %d", tcgetpgrp (fd_tty), getpgrp ()));
316 /* ---------------------------------------- */
317#endif /* ! __QNX__ */
318 316
319 return 0; 317 return 0;
320} 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 = 0;
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 chown (name, getuid (), ttyconf.gid); /* fail silently */
400 chmod (name, ttyconf.mode);
401# ifdef HAVE_REVOKE
402 revoke (name);
403# endif
404 }
405 else
406 { /* action == RESTORE */
407 chmod (name, RESTORE_TTY_MODE);
408 chown (name, 0, ttyconf.gid);
409 }
410}
411#endif
412
413rxvt_ptytty_unix::rxvt_ptytty_unix ()
414{
415 pty = tty = -1;
416 name = 0;
417#if UTMP_SUPPORT
418 cmd_pid = 0;
419#endif
420}
421
422rxvt_ptytty_unix::~rxvt_ptytty_unix ()
423{
424#if UTMP_SUPPORT
425 logout ();
426#endif
427 put ();
428}
429
430void
431rxvt_ptytty_unix::put ()
432{
433#ifndef NO_SETOWNER_TTYDEV
434 privileges (RESTORE);
435#endif
436
437 if (pty >= 0) close (pty);
438 close_tty ();
439 free (name);
440
441 pty = tty = -1;
442 name = 0;
443}
444
445bool
446rxvt_ptytty_unix::get ()
447{
448 /* get master (pty) */
449 if ((pty = get_pty (&tty, &name)) < 0)
450 return false;
451
452 fcntl (pty, F_SETFL, O_NONBLOCK);
453
454 /* get slave (tty) */
455 if (tty < 0)
456 {
457#ifndef NO_SETOWNER_TTYDEV
458 privileges (SAVE);
459#endif
460
461 if ((tty = get_tty (name)) < 0)
462 {
463 put ();
464 return false;
465 }
466 }
467
468 return true;
469}
470
471#if PTYTTY_HELPER
472
473static int sock_fd;
474static int pid;
475
476struct command
477{
478 enum { get, login, destroy } type;
479
480 rxvt_ptytty *id;
481
482 bool login_shell;
483 int cmd_pid;
484 char hostname[512]; // arbitrary, but should be plenty
485};
486
487struct rxvt_ptytty_proxy : zero_initialized, rxvt_ptytty
488{
489 rxvt_ptytty *id;
490
491 ~rxvt_ptytty_proxy ();
492
493 bool get ();
494 void login (int cmd_pid, bool login_shell, const char *hostname);
495};
496
497bool
498rxvt_ptytty_proxy::get ()
499{
500 command cmd;
501
502 cmd.type = command::get;
503
504 write (sock_fd, &cmd, sizeof (cmd));
505
506 if (read (sock_fd, &id, sizeof (id)) != sizeof (id))
507 rxvt_fatal ("protocol error while creating pty using helper process, aborting.\n");
508
509 if (!id)
510 return false;
511
512 if ((pty = rxvt_recv_fd (sock_fd)) < 0
513 || (tty = rxvt_recv_fd (sock_fd)) < 0)
514 rxvt_fatal ("protocol error while reading pty/tty fds from helper process, aborting.\n");
515
516 return true;
517}
518
519void
520rxvt_ptytty_proxy::login (int cmd_pid, bool login_shell, const char *hostname)
521{
522 command cmd;
523
524 cmd.type = command::login;
525 cmd.id = id;
526 cmd.cmd_pid = cmd_pid;
527 cmd.login_shell = login_shell;
528 strncpy (cmd.hostname, hostname, sizeof (cmd.hostname));
529
530 write (sock_fd, &cmd, sizeof (cmd));
531}
532
533rxvt_ptytty_proxy::~rxvt_ptytty_proxy ()
534{
535 command cmd;
536
537 cmd.type = command::destroy;
538 cmd.id = id;
539
540 write (sock_fd, &cmd, sizeof (cmd));
541}
542
543static
544void serve ()
545{
546 command cmd;
547 vector<rxvt_ptytty *> ptys;
548
549 while (read (sock_fd, &cmd, sizeof (command)) == sizeof (command))
550 {
551 if (cmd.type == command::get)
552 {
553 // -> id ptyfd ttyfd
554 cmd.id = new rxvt_ptytty_unix;
555
556 if (cmd.id->get ())
557 {
558 write (sock_fd, &cmd.id, sizeof (cmd.id));
559 ptys.push_back (cmd.id);
560
561 rxvt_send_fd (sock_fd, cmd.id->pty);
562 rxvt_send_fd (sock_fd, cmd.id->tty);
563 }
564 else
565 {
566 delete cmd.id;
567 cmd.id = 0;
568 write (sock_fd, &cmd.id, sizeof (cmd.id));
569 }
570 }
571 else if (cmd.type == command::login)
572 {
573#if UTMP_SUPPORT
574 if (find (ptys.begin (), ptys.end (), cmd.id))
575 {
576 cmd.hostname[sizeof (cmd.hostname) - 1] = 0;
577 cmd.id->login (cmd.cmd_pid, cmd.login_shell, cmd.hostname);
578 }
579#endif
580 }
581 else if (cmd.type == command::destroy)
582 {
583 rxvt_ptytty **pty = find (ptys.begin (), ptys.end (), cmd.id);
584
585 if (pty)
586 {
587 delete *pty;
588 ptys.erase (pty);
589 }
590 }
591 else
592 break;
593 }
594
595 // destroy all ptys
596 for (rxvt_ptytty **i = ptys.end (); i-- > ptys.begin (); )
597 delete *i;
598}
599
600void rxvt_ptytty_server ()
601{
602 int sv[2];
603
604 if (socketpair (AF_UNIX, SOCK_STREAM, 0, sv))
605 rxvt_fatal ("could not create socket to communicate with pty/sessiondb helper, aborting.\n");
606
607 pid = fork ();
608
609 if (pid < 0)
610 rxvt_fatal ("could not create pty/sessiondb helper process, aborting.\n");
611
612 if (pid)
613 {
614 // client, urxvt
615 sock_fd = sv[0];
616 close (sv[1]);
617 fcntl (sock_fd, F_SETFD, FD_CLOEXEC);
618 }
619 else
620 {
621 // server, pty-helper
622 sock_fd = sv[1];
623
624 for (int fd = 0; fd < 1023; fd++)
625 if (fd != sock_fd)
626 close (fd);
627
628 serve ();
629 _exit (EXIT_SUCCESS);
630 }
631}
632#endif
633
634// a "factory" *g*
635rxvt_ptytty *
636rxvt_new_ptytty ()
637{
638#if PTYTTY_HELPER
639 if (pid > 0)
640 // use helper process
641 return new rxvt_ptytty_proxy;
642 else
643#endif
644 return new rxvt_ptytty_unix;
645}
646
321/*----------------------- end-of-file (C source) -----------------------*/ 647/*----------------------- end-of-file (C source) -----------------------*/
648

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