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

Comparing libptytty/src/ptytty.C (file contents):
Revision 1.1 by root, Sat Jan 21 21:40:00 2006 UTC vs.
Revision 1.5 by root, Sat Jan 21 23:35:08 2006 UTC

… …
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 Marc Lehmann <pcg@goof.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
26#include "fdpass.h"
25#include "rxvt.h" 27#include "ptytty.h"
26 28
27#ifdef HAVE_STDLIB_H
28# include <cstdlib> 29#include <cstdlib>
29#endif 30#include <cstring>
30#ifdef HAVE_SYS_TYPES_H 31
31# include <sys/types.h> 32#include <sys/types.h>
32#endif 33#include <sys/socket.h>
33#ifdef HAVE_UNISTD_H
34# include <unistd.h> 34#include <unistd.h>
35#endif
36#if defined(HAVE_STRING_H)
37# include <cstring>
38#endif
39#ifdef HAVE_FCNTL_H
40# include <fcntl.h> 35#include <fcntl.h>
41#endif 36
42#ifdef HAVE_SYS_IOCTL_H 37#ifdef HAVE_SYS_IOCTL_H
43# include <sys/ioctl.h> 38# include <sys/ioctl.h>
44#endif 39#endif
45#if defined(PTYS_ARE_PTMX) && defined(HAVE_SYS_STROPTS_H) 40#if defined(HAVE_DEV_PTMX) && defined(HAVE_SYS_STROPTS_H)
46# include <sys/stropts.h> /* for I_PUSH */ 41# include <sys/stropts.h> /* for I_PUSH */
47#endif 42#endif
48#ifdef HAVE_ISASTREAM 43#ifdef HAVE_ISASTREAM
49# include <stropts.h> 44# include <stropts.h>
50#endif 45#endif
51#ifdef HAVE_PTY_H 46#if defined(HAVE_PTY_H)
52# include <pty.h> 47# include <pty.h>
53#endif 48#elif defined(HAVE_LIBUTIL_H)
54
55// better do this via configure, but....
56#if defined(__FreeBSD__)
57# include <libutil.h> 49# include <libutil.h>
58#elif defined(__DARWIN__) || (defined (__MACH__) && defined (__APPLE__)) 50#elif defined(HAVE_UTIL_H)
59# include <util.h> 51# include <util.h>
60#endif 52#endif
53#ifdef TTY_GID_SUPPORT
54#include <grp.h>
55#endif
61 56
62#include <cstdio> 57#include <cstdio>
63#include <grp.h> 58
59/////////////////////////////////////////////////////////////////////////////
64 60
65/* ------------------------------------------------------------------------- * 61/* ------------------------------------------------------------------------- *
66 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 62 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
67 * ------------------------------------------------------------------------- */ 63 * ------------------------------------------------------------------------- */
68/* 64/*
69 * Returns pty file descriptor, or -1 on failure 65 * Returns pty file descriptor, or -1 on failure
70 * 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.
71 * 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
72 */ 68 */
69#if defined(UNIX98_PTY)
73static int 70static int
74get_pty (int *fd_tty, char **ttydev) 71get_pty (int *fd_tty, char **ttydev)
75{ 72{
76 int pfd; 73 int pfd;
77 74
78#ifdef PTYS_ARE_OPENPTY 75# if defined(HAVE_GETPT)
79 char tty_name[sizeof "/dev/pts/????\0"]; 76 pfd = getpt();
77# elif defined(HAVE_POSIX_OPENPT)
78 pfd = posix_openpt (O_RDWR);
79# else
80 pfd = open (CLONE_DEVICE, 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 }
80 90
91 close (pfd);
92 }
93
94 return -1;
95}
96#elif defined(HAVE_OPENPTY)
97static int
98get_pty (int *fd_tty, char **ttydev)
99{
100 int pfd;
101 int res;
102 char tty_name[32];
103
81 if (openpty (&pfd, fd_tty, tty_name, NULL, NULL) != -1) 104 res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
105 if (res != -1)
82 { 106 {
83 *ttydev = strdup (tty_name); 107 *ttydev = strdup (tty_name);
84 return pfd; 108 return pfd;
85 } 109 }
86#endif
87 110
88#ifdef PTYS_ARE__GETPTY 111 return -1;
112}
113#elif defined(HAVE__GETPTY)
114static int
115get_pty (int *fd_tty, char **ttydev)
116{
117 int pfd;
118
89 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); 119 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
90 if (*ttydev != NULL) 120 if (*ttydev != NULL)
91 return pfd; 121 return pfd;
92#endif
93 122
94#ifdef PTYS_ARE_GETPTY 123 return -1;
95 char *ptydev; 124}
125#elif defined(HAVE_DEV_PTC)
126static int
127get_pty (int *fd_tty, char **ttydev)
128{
129 int pfd;
96 130
97 while ((ptydev = getpty ()) != NULL)
98 if ((pfd = open (ptydev, O_RDWR | O_NOCTTY, 0)) >= 0)
99 {
100 *ttydev = ptydev;
101 return pfd;
102 }
103#endif
104
105#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
106# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_PTMX)
107
108 {
109# ifdef PTYS_ARE_GETPT
110 pfd = getpt ();
111# else
112 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
113# endif
114
115 if (pfd >= 0)
116 {
117 if (grantpt (pfd) == 0 /* change slave permissions */
118 && unlockpt (pfd) == 0)
119 { /* slave now unlocked */
120 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
121 return pfd;
122 }
123 close (pfd);
124 }
125 }
126# endif
127#endif
128
129#ifdef PTYS_ARE_PTC
130 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) 131 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
131 { 132 {
132 *ttydev = strdup (ttyname (pfd)); 133 *ttydev = strdup (ttyname (pfd));
133 return pfd; 134 return pfd;
134 } 135 }
135#endif
136 136
137#ifdef PTYS_ARE_CLONE 137 return -1;
138}
139#elif defined(HAVE_DEV_CLONE)
140static int
141get_pty (int *fd_tty, char **ttydev)
142{
143 int pfd;
144
138 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 145 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
139 { 146 {
140 *ttydev = strdup (ptsname (pfd)); 147 *ttydev = strdup (ptsname (pfd));
141 return pfd; 148 return pfd;
142 } 149 }
143#endif
144
145#ifdef PTYS_ARE_NUMERIC
146 {
147 int idx;
148 char *c1, *c2;
149 char pty_name[] = "/dev/ptyp???";
150 char tty_name[] = "/dev/ttyp???";
151
152 c1 = &(pty_name[sizeof (pty_name) - 4]);
153 c2 = &(tty_name[sizeof (tty_name) - 4]);
154 for (idx = 0; idx < 256; idx++)
155 {
156 sprintf (c1, "%d", idx);
157 sprintf (c2, "%d", idx);
158 if (access (tty_name, F_OK) < 0)
159 {
160 idx = 256;
161 break;
162 }
163
164 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
165 {
166 if (access (tty_name, R_OK | W_OK) == 0)
167 {
168 *ttydev = strdup (tty_name);
169 return pfd;
170 }
171
172 close (pfd);
173 }
174 }
175 }
176#endif
177
178#ifdef PTYS_ARE_SEARCHED
179 {
180 const char *c1, *c2;
181 char pty_name[] = "/dev/pty??";
182 char tty_name[] = "/dev/tty??";
183
184# ifndef PTYCHAR1
185# define PTYCHAR1 "pqrstuvwxyz"
186# endif
187# ifndef PTYCHAR2
188# define PTYCHAR2 "0123456789abcdef"
189# endif
190
191 for (c1 = PTYCHAR1; *c1; c1++)
192 {
193 pty_name[ (sizeof (pty_name) - 3)] =
194 tty_name[ (sizeof (pty_name) - 3)] = *c1;
195 for (c2 = PTYCHAR2; *c2; c2++)
196 {
197 pty_name[ (sizeof (pty_name) - 2)] =
198 tty_name[ (sizeof (pty_name) - 2)] = *c2;
199 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
200 {
201 if (access (tty_name, R_OK | W_OK) == 0)
202 {
203 *ttydev = strdup (tty_name);
204 return pfd;
205 }
206
207 close (pfd);
208 }
209 }
210 }
211 }
212#endif
213 150
214 return -1; 151 return -1;
215} 152}
153#else
154/* Based on the code in openssh/openbsd-compat/bsd-openpty.c */
155static int
156get_pty (int *fd_tty, char **ttydev)
157{
158 int pfd;
159 int i;
160 char pty_name[32];
161 char tty_name[32];
162 const char *majors = "pqrstuvwxyzabcde";
163 const char *minors = "0123456789abcdef";
164 for (i = 0; i < 256; i++)
165 {
166 snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]);
167 snprintf(tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]);
168 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
169 {
170 snprintf(pty_name, 32, "/dev/ptyp%d", i);
171 snprintf(tty_name, 32, "/dev/ttyp%d", i);
172 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
173 continue;
174 }
175 if (access (tty_name, R_OK | W_OK) == 0)
176 {
177 *ttydev = strdup (tty_name);
178 return pfd;
179 }
180
181 close (pfd);
182 }
183}
184#endif
216 185
217/*----------------------------------------------------------------------*/ 186/*----------------------------------------------------------------------*/
218/* 187/*
219 * Returns tty file descriptor, or -1 on failure 188 * Returns tty file descriptor, or -1 on failure
220 */ 189 */
… …
227/*----------------------------------------------------------------------*/ 196/*----------------------------------------------------------------------*/
228/* 197/*
229 * Make our tty a controlling tty so that /dev/tty points to us 198 * Make our tty a controlling tty so that /dev/tty points to us
230 */ 199 */
231static int 200static int
232control_tty (int fd_tty, const char *ttydev) 201control_tty (int fd_tty)
233{ 202{
234#ifndef __QNX__
235 int fd;
236
237 /* ---------------------------------------- */
238# ifdef HAVE_SETSID
239 setsid (); 203 setsid ();
240# endif
241# if defined(HAVE_SETPGID)
242 setpgid (0, 0);
243# elif defined(HAVE_SETPGRP)
244 setpgrp (0, 0);
245# endif
246 204
247 /* ---------------------------------------- */
248# ifdef TIOCNOTTY
249 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
250 if (fd >= 0)
251 {
252 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
253 close (fd);
254 }
255# endif
256
257 /* ---------------------------------------- */
258 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
259 if (fd >= 0)
260 close (fd); /* ouch: still have controlling tty */
261
262 /* ---------------------------------------- */
263#if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 205#if defined(HAVE_DEV_PTMX) && defined(I_PUSH)
264 /* 206 /*
265 * Push STREAMS modules: 207 * Push STREAMS modules:
266 * ptem: pseudo-terminal hardware emulation module. 208 * ptem: pseudo-terminal hardware emulation module.
267 * ldterm: standard terminal line discipline. 209 * ldterm: standard terminal line discipline.
268 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 210 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
… …
285 ioctl (fd_tty, I_PUSH, "ptem"); 227 ioctl (fd_tty, I_PUSH, "ptem");
286 ioctl (fd_tty, I_PUSH, "ldterm"); 228 ioctl (fd_tty, I_PUSH, "ldterm");
287 ioctl (fd_tty, I_PUSH, "ttcompat"); 229 ioctl (fd_tty, I_PUSH, "ttcompat");
288 } 230 }
289#endif 231#endif
290 /* ---------------------------------------- */ 232
291# if defined(TIOCSCTTY)
292 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 233 ioctl (fd_tty, TIOCSCTTY, NULL);
293# elif defined(TIOCSETCTTY) 234
294 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
295# else
296 fd = open (ttydev, O_RDWR);
297 if (fd >= 0)
298 close (fd);
299# endif
300 /* ---------------------------------------- */
301 fd = open ("/dev/tty", O_WRONLY); 235 int fd = open ("/dev/tty", O_WRONLY);
302 if (fd < 0) 236 if (fd < 0)
303 return -1; /* fatal */ 237 return -1; /* fatal */
238
304 close (fd); 239 close (fd);
305 /* ---------------------------------------- */
306#endif /* ! __QNX__ */
307 240
308 return 0; 241 return 0;
309} 242}
310 243
311#ifndef NO_SETOWNER_TTYDEV 244void
245ptytty::close_tty ()
246{
247 if (tty < 0)
248 return;
249
250 close (tty);
251 tty = -1;
252}
253
254bool
255ptytty::make_controlling_tty ()
256{
257 return control_tty (tty) >= 0;
258}
259
260void
261ptytty::set_utf8_mode (bool on)
262{
263#ifdef IUTF8
264 if (pty < 0)
265 return;
266
267 struct termios tio;
268
269 if (tcgetattr (pty, &tio) != -1)
270 {
271 tcflag_t new_cflag = tio.c_iflag;
272
273 if (on)
274 new_cflag |= IUTF8;
275 else
276 new_cflag &= ~IUTF8;
277
278 if (new_cflag != tio.c_iflag)
279 {
280 tio.c_iflag = new_cflag;
281 tcsetattr (pty, TCSANOW, &tio);
282 }
283 }
284#endif
285}
286
312static struct ttyconf { 287static struct ttyconf {
313 gid_t gid; 288 gid_t gid;
314 mode_t mode; 289 mode_t mode;
315 290
316 ttyconf () 291 ttyconf ()
… …
325 } 300 }
326 else 301 else
327#endif /* TTY_GID_SUPPORT */ 302#endif /* TTY_GID_SUPPORT */
328 { 303 {
329 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; 304 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
330 gid = getgid (); 305 gid = 0;
331 } 306 }
332 } 307 }
333} ttyconf; 308} ttyconf;
334 309
310ptytty_unix::ptytty_unix ()
311{
312 name = 0;
313#if UTMP_SUPPORT
314 cmd_pid = 0;
315#endif
316}
317
318ptytty_unix::~ptytty_unix ()
319{
320#if UTMP_SUPPORT
321 logout ();
322#endif
323 put ();
324}
325
335void 326void
336rxvt_ptytty::privileges (rxvt_privaction action) 327ptytty_unix::put ()
337{ 328{
338 if (!name || !*name) 329 chmod (name, RESTORE_TTY_MODE);
339 return; 330 chown (name, 0, ttyconf.gid);
340 331
341 rxvt_privileges (RESTORE); 332 close_tty ();
342 333
343 if (action == SAVE) 334 if (pty >= 0)
344 { 335 close (pty);
345# ifndef RESET_TTY_TO_COMMON_DEFAULTS
346 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
347 if (lstat (name, &savestat) < 0) /* you lose out */
348 ;
349 else
350# endif
351 {
352 saved = true;
353 chown (name, getuid (), ttyconf.gid); /* fail silently */
354 chmod (name, ttyconf.mode);
355# ifdef HAVE_REVOKE
356 revoke (name);
357# endif
358 }
359 }
360 else
361 { /* action == RESTORE */
362# ifndef RESET_TTY_TO_COMMON_DEFAULTS
363 if (saved)
364 {
365 chmod (name, savestat.st_mode);
366 chown (name, savestat.st_uid, savestat.st_gid);
367 }
368# else
369 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
370 chown (name, 0, 0);
371# endif
372 336
373 } 337 free (name);
374 338
375 rxvt_privileges (IGNORE);
376}
377#endif
378
379rxvt_ptytty::rxvt_ptytty ()
380{
381 pty = tty = -1; 339 pty = tty = -1;
382 name = 0; 340 name = 0;
383#ifndef NO_SETOWNER_TTYDEV
384 saved = false;
385#endif
386}
387
388rxvt_ptytty::~rxvt_ptytty ()
389{
390 put ();
391}
392
393void
394
395rxvt_ptytty::close_tty ()
396{
397 if (tty >= 0) close (tty);
398 tty = -1;
399}
400
401void
402rxvt_ptytty::put ()
403{
404#ifndef NO_SETOWNER_TTYDEV
405 if (tty >= 0)
406 privileges (RESTORE);
407#endif
408
409 if (pty >= 0) close (pty);
410 close_tty ();
411 free (name);
412
413 pty = tty = -1;
414 name = 0;
415} 341}
416 342
417bool 343bool
418rxvt_ptytty::make_controlling_tty () 344ptytty_unix::get ()
419{
420 return control_tty (tty, name) >= 0;
421}
422
423bool
424rxvt_ptytty::get ()
425{ 345{
426 /* get master (pty) */ 346 /* get master (pty) */
427 if ((pty = get_pty (&tty, &name)) < 0) 347 if ((pty = get_pty (&tty, &name)) < 0)
428 return false; 348 return false;
429 349
… …
431 351
432 /* get slave (tty) */ 352 /* get slave (tty) */
433 if (tty < 0) 353 if (tty < 0)
434 { 354 {
435#ifndef NO_SETOWNER_TTYDEV 355#ifndef NO_SETOWNER_TTYDEV
436 privileges (SAVE); 356 chown (name, getuid (), ttyconf.gid); /* fail silently */
357 chmod (name, ttyconf.mode);
358# ifdef HAVE_REVOKE
359 revoke (name);
360# endif
437#endif 361#endif
438 362
439 if ((tty = get_tty (name)) < 0) 363 if ((tty = get_tty (name)) < 0)
440 { 364 {
441 put (); 365 put ();
… …
444 } 368 }
445 369
446 return true; 370 return true;
447} 371}
448 372
373#if PTYTTY_HELPER
374
375static int sock_fd;
376static int pid;
377
378struct command
379{
380 enum { get, login, destroy } type;
381
382 ptytty *id;
383
384 bool login_shell;
385 int cmd_pid;
386 char hostname[512]; // arbitrary, but should be plenty
387};
388
389struct ptytty_proxy : zero_initialized, ptytty
390{
391 ptytty *id;
392
393 ~ptytty_proxy ();
394
395 bool get ();
396 void login (int cmd_pid, bool login_shell, const char *hostname);
397};
398
399bool
400ptytty_proxy::get ()
401{
402 command cmd;
403
404 cmd.type = command::get;
405
406 write (sock_fd, &cmd, sizeof (cmd));
407
408 if (read (sock_fd, &id, sizeof (id)) != sizeof (id))
409 fatal ("protocol error while creating pty using helper process, aborting.\n");
410
411 if (!id)
412 return false;
413
414 if ((pty = ptytty_recv_fd (sock_fd)) < 0
415 || (tty = ptytty_recv_fd (sock_fd)) < 0)
416 fatal ("protocol error while reading pty/tty fds from helper process, aborting.\n");
417
418 return true;
419}
420
449void 421void
450rxvt_ptytty::set_utf8_mode (bool on) 422ptytty_proxy::login (int cmd_pid, bool login_shell, const char *hostname)
451{ 423{
452#ifdef IUTF8 424 command cmd;
453 if (pty != -1)
454 {
455 struct termios tio;
456 425
457 if (tcgetattr (pty, &tio) != -1) 426 cmd.type = command::login;
427 cmd.id = id;
428 cmd.cmd_pid = cmd_pid;
429 cmd.login_shell = login_shell;
430 strncpy (cmd.hostname, hostname, sizeof (cmd.hostname));
431
432 write (sock_fd, &cmd, sizeof (cmd));
433}
434
435ptytty_proxy::~ptytty_proxy ()
436{
437 command cmd;
438
439 cmd.type = command::destroy;
440 cmd.id = id;
441
442 write (sock_fd, &cmd, sizeof (cmd));
443}
444
445static
446void serve ()
447{
448 command cmd;
449 vector<ptytty *> ptys;
450
451 while (read (sock_fd, &cmd, sizeof (command)) == sizeof (command))
452 {
453 if (cmd.type == command::get)
454 {
455 // -> id ptyfd ttyfd
456 cmd.id = new ptytty_unix;
457
458 if (cmd.id->get ())
458 { 459 {
459 tcflag_t new_cflag = tio.c_iflag; 460 write (sock_fd, &cmd.id, sizeof (cmd.id));
461 ptys.push_back (cmd.id);
460 462
461 if (on) 463 ptytty_send_fd (sock_fd, cmd.id->pty);
462 new_cflag |= IUTF8; 464 ptytty_send_fd (sock_fd, cmd.id->tty);
465 }
463 else 466 else
464 new_cflag &= ~IUTF8;
465
466 if (new_cflag != tio.c_iflag)
467 { 467 {
468 tio.c_iflag = new_cflag; 468 delete cmd.id;
469 tcsetattr (pty, TCSANOW, &tio); 469 cmd.id = 0;
470 write (sock_fd, &cmd.id, sizeof (cmd.id));
470 } 471 }
471 } 472 }
473 else if (cmd.type == command::login)
474 {
475#if UTMP_SUPPORT
476 if (find (ptys.begin (), ptys.end (), cmd.id))
477 {
478 cmd.hostname[sizeof (cmd.hostname) - 1] = 0;
479 cmd.id->login (cmd.cmd_pid, cmd.login_shell, cmd.hostname);
480 }
481#endif
482 }
483 else if (cmd.type == command::destroy)
484 {
485 ptytty **pty = find (ptys.begin (), ptys.end (), cmd.id);
486
487 if (pty)
488 {
489 delete *pty;
490 ptys.erase (pty);
491 }
492 }
493 else
494 break;
495 }
496
497 // destroy all ptys
498 for (ptytty **i = ptys.end (); i-- > ptys.begin (); )
499 delete *i;
500}
501
502void ptytty_server ()
503{
504 int sv[2];
505
506 if (socketpair (AF_UNIX, SOCK_STREAM, 0, sv))
507 fatal ("could not create socket to communicate with pty/sessiondb helper, aborting.\n");
508
509 pid = fork ();
510
511 if (pid < 0)
512 fatal ("could not create pty/sessiondb helper process, aborting.\n");
513
514 if (pid)
472 } 515 {
516 // client, process
517 sock_fd = sv[0];
518 close (sv[1]);
519 fcntl (sock_fd, F_SETFD, FD_CLOEXEC);
520 }
521 else
522 {
523 // server, pty-helper
524 sock_fd = sv[1];
525
526 for (int fd = 0; fd < 1023; fd++)
527 if (fd != sock_fd)
528 close (fd);
529
530 serve ();
531 _exit (EXIT_SUCCESS);
532 }
533}
534
473#endif 535#endif
536
537// a "factory" *g*
538ptytty *
539new_ptytty ()
540{
541#if PTYTTY_HELPER
542 if (pid > 0)
543 // use helper process
544 return new ptytty_proxy;
545 else
546#endif
547 return new ptytty_unix;
474} 548}
475 549
476/*----------------------- end-of-file (C source) -----------------------*/ 550/*----------------------- end-of-file (C source) -----------------------*/
477 551

Diff Legend

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