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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.23 by root, Thu Feb 17 15:07:48 2005 UTC vs.
Revision 1.55 by root, Sun Jan 22 01:00:46 2006 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 Marc Lehmann <pcg@goof.com> 10 * Copyright (c) 2004-2006 Marc Lehmann <pcg@goof.com>
8 * 11 *
9 * This program is free software; you can redistribute it and/or modify 12 * 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 13 * 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 14 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version. 15 * (at your option) any later version.
… …
19 * You should have received a copy of the GNU General Public License 22 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software 23 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 24 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 *---------------------------------------------------------------------*/ 25 *---------------------------------------------------------------------*/
23 26
24#include "../config.h" /* NECESSARY */ 27#include "../config.h"
28
29#include "fdpass.h"
25#include "rxvt.h" 30#include "ptytty.h"
26 31
27#ifdef HAVE_STDLIB_H
28# include <cstdlib> 32#include <cstdlib>
29#endif 33#include <cstring>
30#ifdef HAVE_SYS_TYPES_H 34
31# include <sys/types.h> 35#include <sys/types.h>
32#endif 36#include <sys/socket.h>
33#ifdef HAVE_UNISTD_H
34# include <unistd.h> 37#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> 38#include <fcntl.h>
41#endif 39
42#ifdef HAVE_SYS_IOCTL_H 40#ifdef HAVE_SYS_IOCTL_H
43# include <sys/ioctl.h> 41# include <sys/ioctl.h>
44#endif 42#endif
45#if defined(PTYS_ARE_PTMX) && defined(HAVE_SYS_STROPTS_H) 43#if defined(HAVE_DEV_PTMX) && defined(HAVE_SYS_STROPTS_H)
46# include <sys/stropts.h> /* for I_PUSH */ 44# include <sys/stropts.h> /* for I_PUSH */
47#endif 45#endif
48#ifdef HAVE_ISASTREAM 46#ifdef HAVE_ISASTREAM
49# include <stropts.h> 47# include <stropts.h>
50#endif 48#endif
51#ifdef HAVE_PTY_H 49#if defined(HAVE_PTY_H)
52# include <pty.h> 50# include <pty.h>
53#endif 51#elif defined(HAVE_LIBUTIL_H)
54
55// better do this via configure, but....
56#if defined(__FreeBSD__)
57# include <libutil.h> 52# include <libutil.h>
58#elif defined(__DARWIN__) || (defined (__MACH__) && defined (__APPLE__)) 53#elif defined(HAVE_UTIL_H)
59# include <util.h> 54# include <util.h>
60#endif 55#endif
56#ifdef TTY_GID_SUPPORT
57#include <grp.h>
58#endif
61 59
62#include <cstdio> 60#include <cstdio>
63#include <grp.h> 61
62/////////////////////////////////////////////////////////////////////////////
64 63
65/* ------------------------------------------------------------------------- * 64/* ------------------------------------------------------------------------- *
66 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 65 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
67 * ------------------------------------------------------------------------- */ 66 * ------------------------------------------------------------------------- */
68/* 67/*
69 * Returns pty file descriptor, or -1 on failure 68 * Returns pty file descriptor, or -1 on failure
70 * 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.
71 * 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
72 */ 71 */
72#if defined(UNIX98_PTY)
73static int 73static int
74get_pty (int *fd_tty, char **ttydev) 74get_pty (int *fd_tty, char **ttydev)
75{ 75{
76 int pfd; 76 int pfd;
77 77
78#ifdef PTYS_ARE_OPENPTY 78# if defined(HAVE_GETPT)
79 char tty_name[sizeof "/dev/pts/????\0"]; 79 pfd = getpt();
80# elif defined(HAVE_POSIX_OPENPT)
81 pfd = posix_openpt (O_RDWR);
82# else
83 pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0);
84# endif
85 if (pfd >= 0)
86 {
87 if (grantpt (pfd) == 0 /* change slave permissions */
88 && unlockpt (pfd) == 0)
89 { /* slave now unlocked */
90 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
91 return pfd;
92 }
80 93
94 close (pfd);
95 }
96
97 return -1;
98}
99#elif defined(HAVE_OPENPTY)
100static int
101get_pty (int *fd_tty, char **ttydev)
102{
103 int pfd;
104 int res;
105 char tty_name[32];
106
81 if (openpty (&pfd, fd_tty, tty_name, NULL, NULL) != -1) 107 res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
108 if (res != -1)
82 { 109 {
83 *ttydev = strdup (tty_name); 110 *ttydev = strdup (tty_name);
84 return pfd; 111 return pfd;
85 } 112 }
86#endif
87 113
88#ifdef PTYS_ARE__GETPTY 114 return -1;
115}
116#elif defined(HAVE__GETPTY)
117static int
118get_pty (int *fd_tty, char **ttydev)
119{
120 int pfd;
121
89 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); 122 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
90 if (*ttydev != NULL) 123 if (*ttydev != NULL)
91 return pfd; 124 return pfd;
92#endif
93 125
94#ifdef PTYS_ARE_GETPTY 126 return -1;
127}
128#elif defined(HAVE_DEV_PTC)
129static int
130get_pty (int *fd_tty, char **ttydev)
131{
132 int pfd;
95 133
96 char *ptydev;
97
98 while ((ptydev = getpty ()) != NULL)
99 if ((pfd = open (ptydev, O_RDWR | O_NOCTTY, 0)) >= 0)
100 {
101 *ttydev = ptydev;
102 return pfd;
103 }
104#endif
105
106#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
107# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_PTMX)
108
109 {
110# ifdef PTYS_ARE_GETPT
111 pfd = getpt ();
112# else
113 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
114# endif
115
116 if (pfd >= 0)
117 {
118 if (grantpt (pfd) == 0 /* change slave permissions */
119 && unlockpt (pfd) == 0)
120 { /* slave now unlocked */
121 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
122 return pfd;
123 }
124 close (pfd);
125 }
126 }
127# endif
128#endif
129
130#ifdef PTYS_ARE_PTC
131 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) 134 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
132 { 135 {
133 *ttydev = strdup (ttyname (pfd)); 136 *ttydev = strdup (ttyname (pfd));
134 return pfd; 137 return pfd;
135 } 138 }
136#endif
137 139
138#ifdef PTYS_ARE_CLONE 140 return -1;
141}
142#elif defined(HAVE_DEV_CLONE)
143static int
144get_pty (int *fd_tty, char **ttydev)
145{
146 int pfd;
147
139 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 148 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
140 { 149 {
141 *ttydev = strdup (ptsname (pfd)); 150 *ttydev = strdup (ptsname (pfd));
142 return pfd; 151 return pfd;
143 } 152 }
144#endif
145
146#ifdef PTYS_ARE_NUMERIC
147 {
148 int idx;
149 char *c1, *c2;
150 char pty_name[] = "/dev/ptyp???";
151 char tty_name[] = "/dev/ttyp???";
152
153 c1 = &(pty_name[sizeof (pty_name) - 4]);
154 c2 = &(tty_name[sizeof (tty_name) - 4]);
155 for (idx = 0; idx < 256; idx++)
156 {
157 sprintf (c1, "%d", idx);
158 sprintf (c2, "%d", idx);
159 if (access (tty_name, F_OK) < 0)
160 {
161 idx = 256;
162 break;
163 }
164
165 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
166 {
167 if (access (tty_name, R_OK | W_OK) == 0)
168 {
169 *ttydev = strdup (tty_name);
170 return pfd;
171 }
172
173 close (pfd);
174 }
175 }
176 }
177#endif
178
179#ifdef PTYS_ARE_SEARCHED
180 {
181 const char *c1, *c2;
182 char pty_name[] = "/dev/pty??";
183 char tty_name[] = "/dev/tty??";
184
185# ifndef PTYCHAR1
186# define PTYCHAR1 "pqrstuvwxyz"
187# endif
188# ifndef PTYCHAR2
189# define PTYCHAR2 "0123456789abcdef"
190# endif
191
192 for (c1 = PTYCHAR1; *c1; c1++)
193 {
194 pty_name[ (sizeof (pty_name) - 3)] =
195 tty_name[ (sizeof (pty_name) - 3)] = *c1;
196 for (c2 = PTYCHAR2; *c2; c2++)
197 {
198 pty_name[ (sizeof (pty_name) - 2)] =
199 tty_name[ (sizeof (pty_name) - 2)] = *c2;
200 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
201 {
202 if (access (tty_name, R_OK | W_OK) == 0)
203 {
204 *ttydev = strdup (tty_name);
205 return pfd;
206 }
207
208 close (pfd);
209 }
210 }
211 }
212 }
213#endif
214 153
215 return -1; 154 return -1;
216} 155}
156#else
157/* Based on the code in openssh/openbsd-compat/bsd-openpty.c */
158static int
159get_pty (int *fd_tty, char **ttydev)
160{
161 int pfd;
162 int i;
163 char pty_name[32];
164 char tty_name[32];
165 const char *majors = "pqrstuvwxyzabcde";
166 const char *minors = "0123456789abcdef";
167 for (i = 0; i < 256; i++)
168 {
169 snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]);
170 snprintf(tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]);
171 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
172 {
173 snprintf(pty_name, 32, "/dev/ptyp%d", i);
174 snprintf(tty_name, 32, "/dev/ttyp%d", i);
175 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
176 continue;
177 }
178 if (access (tty_name, R_OK | W_OK) == 0)
179 {
180 *ttydev = strdup (tty_name);
181 return pfd;
182 }
183
184 close (pfd);
185 }
186}
187#endif
217 188
218/*----------------------------------------------------------------------*/ 189/*----------------------------------------------------------------------*/
219/* 190/*
220 * Returns tty file descriptor, or -1 on failure 191 * Returns tty file descriptor, or -1 on failure
221 */ 192 */
… …
228/*----------------------------------------------------------------------*/ 199/*----------------------------------------------------------------------*/
229/* 200/*
230 * Make our tty a controlling tty so that /dev/tty points to us 201 * Make our tty a controlling tty so that /dev/tty points to us
231 */ 202 */
232static int 203static int
233control_tty (int fd_tty, const char *ttydev) 204control_tty (int fd_tty)
234{ 205{
235#ifndef __QNX__
236 int fd;
237
238 /* ---------------------------------------- */
239# ifdef HAVE_SETSID
240 setsid (); 206 setsid ();
241# endif
242# if defined(HAVE_SETPGID)
243 setpgid (0, 0);
244# elif defined(HAVE_SETPGRP)
245 setpgrp (0, 0);
246# endif
247 207
248 /* ---------------------------------------- */
249# ifdef TIOCNOTTY
250 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
251 if (fd >= 0)
252 {
253 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
254 close (fd);
255 }
256# endif
257
258 /* ---------------------------------------- */
259 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
260 if (fd >= 0)
261 close (fd); /* ouch: still have controlling tty */
262
263 /* ---------------------------------------- */
264#if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 208#if defined(HAVE_DEV_PTMX) && defined(I_PUSH)
265 /* 209 /*
266 * Push STREAMS modules: 210 * Push STREAMS modules:
267 * ptem: pseudo-terminal hardware emulation module. 211 * ptem: pseudo-terminal hardware emulation module.
268 * ldterm: standard terminal line discipline. 212 * ldterm: standard terminal line discipline.
269 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 213 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
… …
286 ioctl (fd_tty, I_PUSH, "ptem"); 230 ioctl (fd_tty, I_PUSH, "ptem");
287 ioctl (fd_tty, I_PUSH, "ldterm"); 231 ioctl (fd_tty, I_PUSH, "ldterm");
288 ioctl (fd_tty, I_PUSH, "ttcompat"); 232 ioctl (fd_tty, I_PUSH, "ttcompat");
289 } 233 }
290#endif 234#endif
291 /* ---------------------------------------- */ 235
292# if defined(TIOCSCTTY)
293 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 236 ioctl (fd_tty, TIOCSCTTY, NULL);
294# elif defined(TIOCSETCTTY) 237
295 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
296# else
297 fd = open (ttydev, O_RDWR);
298 if (fd >= 0)
299 close (fd);
300# endif
301 /* ---------------------------------------- */
302 fd = open ("/dev/tty", O_WRONLY); 238 int fd = open ("/dev/tty", O_WRONLY);
303 if (fd < 0) 239 if (fd < 0)
304 return -1; /* fatal */ 240 return -1; /* fatal */
241
305 close (fd); 242 close (fd);
306 /* ---------------------------------------- */
307#endif /* ! __QNX__ */
308 243
309 return 0; 244 return 0;
310} 245}
311 246
312#ifndef NO_SETOWNER_TTYDEV 247void
248ptytty::close_tty ()
249{
250 if (tty < 0)
251 return;
252
253 close (tty);
254 tty = -1;
255}
256
257bool
258ptytty::make_controlling_tty ()
259{
260 return control_tty (tty) >= 0;
261}
262
263void
264ptytty::set_utf8_mode (bool on)
265{
266#ifdef IUTF8
267 if (pty < 0)
268 return;
269
270 struct termios tio;
271
272 if (tcgetattr (pty, &tio) != -1)
273 {
274 tcflag_t new_cflag = tio.c_iflag;
275
276 if (on)
277 new_cflag |= IUTF8;
278 else
279 new_cflag &= ~IUTF8;
280
281 if (new_cflag != tio.c_iflag)
282 {
283 tio.c_iflag = new_cflag;
284 tcsetattr (pty, TCSANOW, &tio);
285 }
286 }
287#endif
288}
289
313static struct ttyconf { 290static struct ttyconf {
314 gid_t gid; 291 gid_t gid;
315 mode_t mode; 292 mode_t mode;
316 293
317 ttyconf () 294 ttyconf ()
… …
326 } 303 }
327 else 304 else
328#endif /* TTY_GID_SUPPORT */ 305#endif /* TTY_GID_SUPPORT */
329 { 306 {
330 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; 307 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
331 gid = getgid (); 308 gid = 0;
332 } 309 }
333 } 310 }
334} ttyconf; 311} ttyconf;
335 312
313ptytty_unix::ptytty_unix ()
314{
315 name = 0;
316#if UTMP_SUPPORT
317 cmd_pid = 0;
318#endif
319}
320
321ptytty_unix::~ptytty_unix ()
322{
323#if UTMP_SUPPORT
324 logout ();
325#endif
326 put ();
327}
328
336void 329void
337rxvt_ptytty::privileges (rxvt_privaction action) 330ptytty_unix::put ()
338{ 331{
332 chmod (name, RESTORE_TTY_MODE);
333 chown (name, 0, ttyconf.gid);
334
335 close_tty ();
336
339 if (tty < 0) 337 if (pty >= 0)
340 return; 338 close (pty);
341 339
342 rxvt_privileges (RESTORE); 340 free (name);
343 341
344 if (action == SAVE)
345 {
346 //next_tty_action = RESTORE;
347# ifndef RESET_TTY_TO_COMMON_DEFAULTS
348 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
349 if (lstat (name, &savestat) < 0) /* you lose out */
350 ;//next_tty_action = IGNORE;
351 else
352# endif
353 {
354 chown (name, getuid (), ttyconf.gid); /* fail silently */
355 chmod (name, ttyconf.mode);
356# ifdef HAVE_REVOKE
357 revoke (name);
358# endif
359 }
360 }
361 else
362 { /* action == RESTORE */
363 //next_tty_action = IGNORE;
364# ifndef RESET_TTY_TO_COMMON_DEFAULTS
365 chmod (name, savestat.st_mode);
366 chown (name, savestat.st_uid, savestat.st_gid);
367# else
368 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
369 chown (name, 0, 0);
370# endif
371
372 }
373
374 rxvt_privileges (IGNORE);
375}
376#endif
377
378rxvt_ptytty::rxvt_ptytty ()
379{
380 pty = tty = -1; 342 pty = tty = -1;
381 name = 0; 343 name = 0;
382} 344}
383 345
384rxvt_ptytty::~rxvt_ptytty ()
385{
386 put ();
387}
388
389void
390
391rxvt_ptytty::close_tty ()
392{
393 if (tty >= 0) close (tty);
394 tty = -1;
395}
396
397void
398rxvt_ptytty::put ()
399{
400#ifndef NO_SETOWNER_TTYDEV
401 if (tty >= 0)
402 privileges (RESTORE);
403#endif
404
405 if (pty >= 0) close (pty);
406 close_tty ();
407 free (name);
408
409 pty = tty = -1;
410 name = 0;
411}
412
413bool 346bool
414rxvt_ptytty::make_controlling_tty () 347ptytty_unix::get ()
415{
416 return control_tty (tty, name) >= 0;
417}
418
419bool
420rxvt_ptytty::get ()
421{ 348{
422 /* get master (pty) */ 349 /* get master (pty) */
423 if ((pty = get_pty (&tty, &name)) < 0) 350 if ((pty = get_pty (&tty, &name)) < 0)
424 return false; 351 return false;
425 352
… …
427 354
428 /* get slave (tty) */ 355 /* get slave (tty) */
429 if (tty < 0) 356 if (tty < 0)
430 { 357 {
431#ifndef NO_SETOWNER_TTYDEV 358#ifndef NO_SETOWNER_TTYDEV
432 privileges (SAVE); 359 chown (name, getuid (), ttyconf.gid); /* fail silently */
360 chmod (name, ttyconf.mode);
361# ifdef HAVE_REVOKE
362 revoke (name);
363# endif
433#endif 364#endif
434 365
435 if ((tty = get_tty (name)) < 0) 366 if ((tty = get_tty (name)) < 0)
436 { 367 {
437 put (); 368 put ();
… …
440 } 371 }
441 372
442 return true; 373 return true;
443} 374}
444 375
376#if PTYTTY_HELPER
377
378static int sock_fd;
379static int pid;
380
381struct command
382{
383 enum { get, login, destroy } type;
384
385 ptytty *id;
386
387 bool login_shell;
388 int cmd_pid;
389 char hostname[512]; // arbitrary, but should be plenty
390};
391
392struct ptytty_proxy : ptytty
393{
394 ptytty *id;
395
396 ptytty_proxy ()
397 : id(0)
398 {
399 }
400
401 ~ptytty_proxy ();
402
403 bool get ();
404 void login (int cmd_pid, bool login_shell, const char *hostname);
405};
406
407bool
408ptytty_proxy::get ()
409{
410 command cmd;
411
412 cmd.type = command::get;
413
414 write (sock_fd, &cmd, sizeof (cmd));
415
416 if (read (sock_fd, &id, sizeof (id)) != sizeof (id))
417 fatal ("protocol error while creating pty using helper process, aborting.\n");
418
419 if (!id)
420 return false;
421
422 if ((pty = ptytty_recv_fd (sock_fd)) < 0
423 || (tty = ptytty_recv_fd (sock_fd)) < 0)
424 fatal ("protocol error while reading pty/tty fds from helper process, aborting.\n");
425
426 return true;
427}
428
445void 429void
446rxvt_ptytty::set_utf8_mode (bool on) 430ptytty_proxy::login (int cmd_pid, bool login_shell, const char *hostname)
447{ 431{
448#ifdef IUTF8 432 command cmd;
449 if (pty != -1) 433
434 cmd.type = command::login;
435 cmd.id = id;
436 cmd.cmd_pid = cmd_pid;
437 cmd.login_shell = login_shell;
438 strncpy (cmd.hostname, hostname, sizeof (cmd.hostname));
439
440 write (sock_fd, &cmd, sizeof (cmd));
441}
442
443ptytty_proxy::~ptytty_proxy ()
444{
445 if (id)
446 {
447 command cmd;
448
449 cmd.type = command::destroy;
450 cmd.id = id;
451
452 write (sock_fd, &cmd, sizeof (cmd));
450 { 453 }
451 struct termios tio; 454}
452 455
453 if (tcgetattr (pty, &tio) != -1) 456static
457void serve ()
458{
459 command cmd;
460 vector<ptytty *> ptys;
461
462 while (read (sock_fd, &cmd, sizeof (command)) == sizeof (command))
463 {
464 if (cmd.type == command::get)
465 {
466 // -> id ptyfd ttyfd
467 cmd.id = new ptytty_unix;
468
469 if (cmd.id->get ())
454 { 470 {
455 tcflag_t new_cflag = tio.c_iflag; 471 write (sock_fd, &cmd.id, sizeof (cmd.id));
472 ptys.push_back (cmd.id);
456 473
457 if (on) 474 ptytty_send_fd (sock_fd, cmd.id->pty);
458 new_cflag |= IUTF8; 475 ptytty_send_fd (sock_fd, cmd.id->tty);
476 }
459 else 477 else
460 new_cflag &= ~IUTF8;
461
462 if (new_cflag != tio.c_iflag)
463 { 478 {
464 tio.c_iflag = new_cflag; 479 delete cmd.id;
465 tcsetattr (pty, TCSANOW, &tio); 480 cmd.id = 0;
481 write (sock_fd, &cmd.id, sizeof (cmd.id));
466 } 482 }
467 } 483 }
484 else if (cmd.type == command::login)
485 {
486#if UTMP_SUPPORT
487 if (find (ptys.begin (), ptys.end (), cmd.id))
488 {
489 cmd.hostname[sizeof (cmd.hostname) - 1] = 0;
490 cmd.id->login (cmd.cmd_pid, cmd.login_shell, cmd.hostname);
491 }
492#endif
493 }
494 else if (cmd.type == command::destroy)
495 {
496 ptytty **pty = find (ptys.begin (), ptys.end (), cmd.id);
497
498 if (pty)
499 {
500 delete *pty;
501 ptys.erase (pty);
502 }
503 }
504 else
505 break;
506 }
507
508 // destroy all ptys
509 for (ptytty **i = ptys.end (); i-- > ptys.begin (); )
510 delete *i;
511}
512
513void ptytty_server ()
514{
515 int sv[2];
516
517 if (socketpair (AF_UNIX, SOCK_STREAM, 0, sv))
518 fatal ("could not create socket to communicate with pty/sessiondb helper, aborting.\n");
519
520 pid = fork ();
521
522 if (pid < 0)
523 fatal ("could not create pty/sessiondb helper process, aborting.\n");
524
525 if (pid)
468 } 526 {
527 // client, process
528 sock_fd = sv[0];
529 close (sv[1]);
530 fcntl (sock_fd, F_SETFD, FD_CLOEXEC);
531 }
532 else
533 {
534 // server, pty-helper
535 sock_fd = sv[1];
536
537 for (int fd = 0; fd < 1023; fd++)
538 if (fd != sock_fd)
539 close (fd);
540
541 serve ();
542 _exit (EXIT_SUCCESS);
543 }
544}
545
469#endif 546#endif
547
548// a "factory" *g*
549ptytty *
550new_ptytty ()
551{
552#if PTYTTY_HELPER
553 if (pid > 0)
554 // use helper process
555 return new ptytty_proxy;
556 else
557#endif
558 return new ptytty_unix;
470} 559}
471 560
472/*----------------------- end-of-file (C source) -----------------------*/ 561/*----------------------- end-of-file (C source) -----------------------*/
473 562

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