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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.4 by pcg, Tue Dec 2 21:49:46 2003 UTC vs.
Revision 1.52 by root, Thu Jan 19 20:30:36 2006 UTC

1/*--------------------------------*-C-*---------------------------------* 1/*--------------------------------*-C-*---------------------------------*
2 * File: ptytty.c 2 * File: ptytty.C
3 *----------------------------------------------------------------------* 3 *----------------------------------------------------------------------*
4 * $Id: ptytty.C,v 1.4 2003/12/02 21:49:46 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#ifdef DEBUG_TTY 42# include <stropts.h>
54# define D_TTY(x) fprintf x ; fputc('\n', stderr) ; fflush(stderr)
55#else
56# define D_TTY(x)
57#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/////////////////////////////////////////////////////////////////////////////
58 60
59/* ------------------------------------------------------------------------- * 61/* ------------------------------------------------------------------------- *
60 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 62 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
61 * ------------------------------------------------------------------------- */ 63 * ------------------------------------------------------------------------- */
62/* 64/*
63 * Returns pty file descriptor, or -1 on failure 65 * Returns pty file descriptor, or -1 on failure
64 * 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.
65 * 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
66 */ 68 */
67/* EXTPROTO */ 69static inline int
68int
69rxvt_get_pty(int *fd_tty, const char **ttydev) 70get_pty_streams (int *fd_tty, char **ttydev)
70{ 71{
72#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
73# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_POSIX) || defined(PTYS_ARE_PTMX)
71 int pfd; 74 int pfd;
72 75
76# if defined(PTYS_ARE_GETPT)
77 pfd = getpt();
78# elif defined(PTYS_ARE_POSIX)
79 pfd = posix_openpt (O_RDWR);
80# else
81 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
82# endif
83 if (pfd >= 0)
84 {
85 if (grantpt (pfd) == 0 /* change slave permissions */
86 && unlockpt (pfd) == 0)
87 { /* slave now unlocked */
88 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
89 return pfd;
90 }
91
92 close (pfd);
93 }
94# endif
95#endif
96
97 return -1;
98}
99
100static inline int
101get_pty_openpty (int *fd_tty, char **ttydev)
102{
73#ifdef PTYS_ARE_OPENPTY 103#ifdef PTYS_ARE_OPENPTY
74 104 int pfd;
75 char tty_name[sizeof "/dev/pts/????\0"]; 105 int res;
76 106 char tty_name[32];
107
77 if (openpty(&pfd, fd_tty, tty_name, NULL, NULL) != -1) 108 res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
109 if (res != -1)
78 { 110 {
79 *ttydev = strdup(tty_name); 111 *ttydev = strdup (tty_name);
80 return pfd; 112 return pfd;
81 } 113 }
82#endif 114#endif
83 115
116 return -1;
117}
118
119static inline int
120get_pty__getpty (int *fd_tty, char **ttydev)
121{
84#ifdef PTYS_ARE__GETPTY 122#ifdef PTYS_ARE__GETPTY
123 int pfd;
124
85 *ttydev = _getpty(&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); 125 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
86 if (*ttydev != NULL) 126 if (*ttydev != NULL)
87 return pfd; 127 return pfd;
88#endif 128#endif
89 129
90#ifdef PTYS_ARE_GETPTY 130 return -1;
131}
91 132
92 char *ptydev; 133static inline int
93 134get_pty_ptc (int *fd_tty, char **ttydev)
94 while ((ptydev = getpty()) != NULL) 135{
95 if ((pfd = open(ptydev, O_RDWR | O_NOCTTY, 0)) >= 0)
96 {
97 *ttydev = ptydev;
98 return pfd;
99 }
100#endif
101
102#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
103# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_PTMX)
104
105 {
106# ifdef PTYS_ARE_GETPT
107 pfd = getpt();
108# else
109
110 pfd = open("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
111# endif
112
113 if (pfd >= 0)
114 {
115 if (grantpt(pfd) == 0 /* change slave permissions */
116 && unlockpt(pfd) == 0)
117 { /* slave now unlocked */
118 *ttydev = ptsname(pfd); /* get slave's name */
119 return pfd;
120 }
121 close(pfd);
122 }
123 }
124# endif
125#endif
126
127#ifdef PTYS_ARE_PTC 136#ifdef PTYS_ARE_PTC
137 int pfd;
138
128 if ((pfd = open("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) 139 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
129 { 140 {
130 *ttydev = ttyname(pfd); 141 *ttydev = strdup (ttyname (pfd));
131 return pfd; 142 return pfd;
132 } 143 }
133#endif 144#endif
134 145
146 return -1;
147}
148
149static inline int
150get_pty_clone (int *fd_tty, char **ttydev)
151{
135#ifdef PTYS_ARE_CLONE 152#ifdef PTYS_ARE_CLONE
153 int pfd;
154
136 if ((pfd = open("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 155 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
137 { 156 {
138 *ttydev = ptsname(pfd); 157 *ttydev = strdup (ptsname (pfd));
139 return pfd; 158 return pfd;
140 } 159 }
141#endif 160#endif
142 161
162 return -1;
163}
164
165static inline int
166get_pty_numeric (int *fd_tty, char **ttydev)
167{
143#ifdef PTYS_ARE_NUMERIC 168#ifdef PTYS_ARE_NUMERIC
144 { 169 int pfd;
145 int idx; 170 int idx;
146 char *c1, *c2; 171 char *c1, *c2;
147 char pty_name[] = "/dev/ptyp???"; 172 char pty_name[] = "/dev/ptyp???";
148 char tty_name[] = "/dev/ttyp???"; 173 char tty_name[] = "/dev/ttyp???";
149 174
150 c1 = &(pty_name[sizeof(pty_name) - 4]); 175 c1 = &(pty_name[sizeof (pty_name) - 4]);
151 c2 = &(tty_name[sizeof(tty_name) - 4]); 176 c2 = &(tty_name[sizeof (tty_name) - 4]);
177
152 for (idx = 0; idx < 256; idx++) 178 for (idx = 0; idx < 256; idx++)
153 { 179 {
154 sprintf(c1, "%d", idx); 180 sprintf (c1, "%d", idx);
155 sprintf(c2, "%d", idx); 181 sprintf (c2, "%d", idx);
182
156 if (access(tty_name, F_OK) < 0) 183 if (access (tty_name, F_OK) < 0)
157 { 184 {
158 idx = 256; 185 idx = 256;
159 break; 186 break;
160 } 187 }
188
161 if ((pfd = open(pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 189 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
162 { 190 {
163 if (access(tty_name, R_OK | W_OK) == 0) 191 if (access (tty_name, R_OK | W_OK) == 0)
164 { 192 {
165 *ttydev = strdup(tty_name); 193 *ttydev = strdup (tty_name);
166 return pfd; 194 return pfd;
167 } 195 }
196
168 close(pfd); 197 close (pfd);
169 } 198 }
170 } 199 }
171 }
172#endif 200#endif
201
202 return -1;
203}
204
205static inline int
206get_pty_searched (int *fd_tty, char **ttydev)
207{
173#ifdef PTYS_ARE_SEARCHED 208#ifdef PTYS_ARE_SEARCHED
174 {
175 const char *c1, *c2;
176 char pty_name[] = "/dev/pty??";
177 char tty_name[] = "/dev/tty??";
178
179# ifndef PTYCHAR1 209# ifndef PTYCHAR1
180# define PTYCHAR1 "pqrstuvwxyz" 210# define PTYCHAR1 "pqrstuvwxyz"
181# endif 211# endif
182# ifndef PTYCHAR2 212# ifndef PTYCHAR2
183# define PTYCHAR2 "0123456789abcdef" 213# define PTYCHAR2 "0123456789abcdef"
184# endif 214# endif
215 int pfd;
216 const char *c1, *c2;
217 char pty_name[] = "/dev/pty??";
218 char tty_name[] = "/dev/tty??";
185 219
186 for (c1 = PTYCHAR1; *c1; c1++) 220 for (c1 = PTYCHAR1; *c1; c1++)
187 { 221 {
188 pty_name[(sizeof(pty_name) - 3)] = 222 pty_name[ (sizeof (pty_name) - 3)] =
189 tty_name[(sizeof(pty_name) - 3)] = *c1; 223 tty_name[ (sizeof (pty_name) - 3)] = *c1;
224
190 for (c2 = PTYCHAR2; *c2; c2++) 225 for (c2 = PTYCHAR2; *c2; c2++)
191 { 226 {
192 pty_name[(sizeof(pty_name) - 2)] = 227 pty_name[ (sizeof (pty_name) - 2)] =
193 tty_name[(sizeof(pty_name) - 2)] = *c2; 228 tty_name[ (sizeof (pty_name) - 2)] = *c2;
229
194 if ((pfd = open(pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 230 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
195 { 231 {
196 if (access(tty_name, R_OK | W_OK) == 0) 232 if (access (tty_name, R_OK | W_OK) == 0)
197 { 233 {
198 *ttydev = strdup(tty_name); 234 *ttydev = strdup (tty_name);
199 return pfd; 235 return pfd;
200 } 236 }
237
201 close(pfd); 238 close (pfd);
202 } 239 }
203 } 240 }
204 } 241 }
205 }
206#endif 242#endif
243
244 return -1;
245}
246
247static int
248get_pty (int *fd_tty, char **ttydev)
249{
250 int pfd;
251
252 if ((pfd = get_pty_streams (fd_tty, ttydev)) != -1
253 || (pfd = get_pty_openpty (fd_tty, ttydev)) != -1
254 || (pfd = get_pty__getpty (fd_tty, ttydev)) != -1
255 || (pfd = get_pty_ptc (fd_tty, ttydev)) != -1
256 || (pfd = get_pty_clone (fd_tty, ttydev)) != -1
257 || (pfd = get_pty_numeric (fd_tty, ttydev)) != -1
258 || (pfd = get_pty_searched (fd_tty, ttydev)) != -1)
259 return pfd;
260
207 return -1; 261 return -1;
208} 262}
209 263
210/*----------------------------------------------------------------------*/ 264/*----------------------------------------------------------------------*/
211/* 265/*
212 * Returns tty file descriptor, or -1 on failure 266 * Returns tty file descriptor, or -1 on failure
213 */ 267 */
214/* EXTPROTO */ 268static int
215int
216rxvt_get_tty (const char *ttydev) 269get_tty (char *ttydev)
217{ 270{
218 return open (ttydev, O_RDWR | O_NOCTTY, 0); 271 return open (ttydev, O_RDWR | O_NOCTTY, 0);
219} 272}
220 273
221/*----------------------------------------------------------------------*/ 274/*----------------------------------------------------------------------*/
222/* 275/*
223 * Make our tty a controlling tty so that /dev/tty points to us 276 * Make our tty a controlling tty so that /dev/tty points to us
224 */ 277 */
225/* EXTPROTO */ 278static int
226int 279control_tty (int fd_tty)
227rxvt_control_tty (int fd_tty, const char *ttydev)
228{ 280{
229#ifndef __QNX__
230 int fd;
231
232 D_TTY ((stderr, "rxvt_control_tty(): pid: %d, tty fd: %d, dev: %s", getpid(), fd_tty, ttydev));
233 /* ---------------------------------------- */
234# ifdef HAVE_SETSID
235 setsid (); 281 setsid ();
236# endif
237# if defined(HAVE_SETPGID)
238 setpgid (0, 0);
239# elif defined(HAVE_SETPGRP)
240 setpgrp (0, 0);
241# endif
242 /* ---------------------------------------- */
243# ifdef TIOCNOTTY
244 282
245 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
246 D_TTY ((stderr, "rxvt_control_tty(): Voiding tty associations: previous=%s", fd < 0 ? "no" : "yes"));
247 if (fd >= 0)
248 {
249 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
250 close (fd);
251 }
252# endif
253 /* ---------------------------------------- */
254 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
255 D_TTY ((stderr, "rxvt_control_tty(): /dev/tty has controlling tty? %s", fd < 0 ? "no (good)" : "yes (bad)"));
256 if (fd >= 0)
257 close (fd); /* ouch: still have controlling tty */
258 /* ---------------------------------------- */
259#if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 283#if defined(PTYS_ARE_PTMX) && defined(I_PUSH)
260 /* 284 /*
261 * Push STREAMS modules: 285 * Push STREAMS modules:
262 * ptem: pseudo-terminal hardware emulation module. 286 * ptem: pseudo-terminal hardware emulation module.
263 * ldterm: standard terminal line discipline. 287 * ldterm: standard terminal line discipline.
264 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 288 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
265 * 289 *
266 * After we push the STREAMS modules, the first open() on the slave side 290 * After we push the STREAMS modules, the first open () on the slave side
267 * (i.e. the next section between the dashes giving us "tty opened OK") 291 * (i.e. the next section between the dashes giving us "tty opened OK")
268 * should make the "ptem" (or "ldterm" depending upon either which OS 292 * should make the "ptem" (or "ldterm" depending upon either which OS
269 * version or which set of manual pages you have) module give us a 293 * version or which set of manual pages you have) module give us a
270 * controlling terminal. We must already have close()d the master side 294 * controlling terminal. We must already have close ()d the master side
271 * fd in this child process before we push STREAMS modules on because the 295 * fd in this child process before we push STREAMS modules on because the
272 * documentation is really unclear about whether it is any close() on 296 * documentation is really unclear about whether it is any close () on
273 * the master side or the last close() - i.e. a proper STREAMS dismantling 297 * the master side or the last close () - i.e. a proper STREAMS dismantling
274 * close() - on the master side which causes a hang up to be sent 298 * close () - on the master side which causes a hang up to be sent
275 * through - Geoff Wing 299 * through - Geoff Wing
276 */ 300 */
277# ifdef HAVE_ISASTREAM 301# ifdef HAVE_ISASTREAM
278 if (isastream (fd_tty) == 1) 302 if (isastream (fd_tty) == 1)
279# endif 303# endif
280 { 304 {
281 D_TTY ((stderr, "rxvt_control_tty(): Pushing STREAMS modules"));
282 ioctl (fd_tty, I_PUSH, "ptem"); 305 ioctl (fd_tty, I_PUSH, "ptem");
283 ioctl (fd_tty, I_PUSH, "ldterm"); 306 ioctl (fd_tty, I_PUSH, "ldterm");
284 ioctl (fd_tty, I_PUSH, "ttcompat"); 307 ioctl (fd_tty, I_PUSH, "ttcompat");
285 } 308 }
286#endif 309#endif
287 /* ---------------------------------------- */ 310
288# if defined(TIOCSCTTY)
289 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 311 ioctl (fd_tty, TIOCSCTTY, NULL);
290 D_TTY ((stderr, "rxvt_control_tty(): ioctl(..,TIOCSCTTY): %d", fd)); 312
291# elif defined(TIOCSETCTTY)
292 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
293 D_TTY ((stderr, "rxvt_control_tty(): ioctl(..,TIOCSETCTTY): %d", fd));
294# else
295 fd = open (ttydev, O_RDWR);
296 D_TTY ((stderr, "rxvt_control_tty(): tty open%s", fd < 0 ? " failure" : "ed OK"));
297 if (fd >= 0)
298 close(fd);
299# endif
300 /* ---------------------------------------- */
301 fd = open ("/dev/tty", O_WRONLY); 313 int fd = open ("/dev/tty", O_WRONLY);
302 D_TTY ((stderr, "rxvt_control_tty(): do we have controlling tty now: %s", fd < 0 ? "no (fatal)" : "yes (good)"));
303 if (fd < 0) 314 if (fd < 0)
304 return -1; /* fatal */ 315 return -1; /* fatal */
316
305 close (fd); 317 close (fd);
306 /* ---------------------------------------- */
307 D_TTY ((stderr, "rxvt_control_tty(): tcgetpgrp(): %d getpgrp(): %d", tcgetpgrp(fd_tty), getpgrp()));
308 /* ---------------------------------------- */
309#endif /* ! __QNX__ */
310 318
311 return 0; 319 return 0;
312} 320}
321
322void
323rxvt_ptytty::close_tty ()
324{
325 if (tty < 0)
326 return;
327
328 close (tty);
329 tty = -1;
330}
331
332bool
333rxvt_ptytty::make_controlling_tty ()
334{
335 return control_tty (tty) >= 0;
336}
337
338void
339rxvt_ptytty::set_utf8_mode (bool on)
340{
341#ifdef IUTF8
342 if (pty < 0)
343 return;
344
345 struct termios tio;
346
347 if (tcgetattr (pty, &tio) != -1)
348 {
349 tcflag_t new_cflag = tio.c_iflag;
350
351 if (on)
352 new_cflag |= IUTF8;
353 else
354 new_cflag &= ~IUTF8;
355
356 if (new_cflag != tio.c_iflag)
357 {
358 tio.c_iflag = new_cflag;
359 tcsetattr (pty, TCSANOW, &tio);
360 }
361 }
362#endif
363}
364
365static struct ttyconf {
366 gid_t gid;
367 mode_t mode;
368
369 ttyconf ()
370 {
371#ifdef TTY_GID_SUPPORT
372 struct group *gr = getgrnam ("tty");
373
374 if (gr)
375 { /* change group ownership of tty to "tty" */
376 mode = S_IRUSR | S_IWUSR | S_IWGRP;
377 gid = gr->gr_gid;
378 }
379 else
380#endif /* TTY_GID_SUPPORT */
381 {
382 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
383 gid = 0;
384 }
385 }
386} ttyconf;
387
388rxvt_ptytty_unix::rxvt_ptytty_unix ()
389{
390 name = 0;
391#if UTMP_SUPPORT
392 cmd_pid = 0;
393#endif
394}
395
396rxvt_ptytty_unix::~rxvt_ptytty_unix ()
397{
398#if UTMP_SUPPORT
399 logout ();
400#endif
401 put ();
402}
403
404void
405rxvt_ptytty_unix::put ()
406{
407 chmod (name, RESTORE_TTY_MODE);
408 chown (name, 0, ttyconf.gid);
409
410 close_tty ();
411
412 if (pty >= 0)
413 close (pty);
414
415 free (name);
416
417 pty = tty = -1;
418 name = 0;
419}
420
421bool
422rxvt_ptytty_unix::get ()
423{
424 /* get master (pty) */
425 if ((pty = get_pty (&tty, &name)) < 0)
426 return false;
427
428 fcntl (pty, F_SETFL, O_NONBLOCK);
429
430 /* get slave (tty) */
431 if (tty < 0)
432 {
433#ifndef NO_SETOWNER_TTYDEV
434 chown (name, getuid (), ttyconf.gid); /* fail silently */
435 chmod (name, ttyconf.mode);
436# ifdef HAVE_REVOKE
437 revoke (name);
438# endif
439#endif
440
441 if ((tty = get_tty (name)) < 0)
442 {
443 put ();
444 return false;
445 }
446 }
447
448 return true;
449}
450
451#if PTYTTY_HELPER
452
453static int sock_fd;
454static int pid;
455
456struct command
457{
458 enum { get, login, destroy } type;
459
460 rxvt_ptytty *id;
461
462 bool login_shell;
463 int cmd_pid;
464 char hostname[512]; // arbitrary, but should be plenty
465};
466
467struct rxvt_ptytty_proxy : zero_initialized, rxvt_ptytty
468{
469 rxvt_ptytty *id;
470
471 ~rxvt_ptytty_proxy ();
472
473 bool get ();
474 void login (int cmd_pid, bool login_shell, const char *hostname);
475};
476
477bool
478rxvt_ptytty_proxy::get ()
479{
480 command cmd;
481
482 cmd.type = command::get;
483
484 write (sock_fd, &cmd, sizeof (cmd));
485
486 if (read (sock_fd, &id, sizeof (id)) != sizeof (id))
487 rxvt_fatal ("protocol error while creating pty using helper process, aborting.\n");
488
489 if (!id)
490 return false;
491
492 if ((pty = rxvt_recv_fd (sock_fd)) < 0
493 || (tty = rxvt_recv_fd (sock_fd)) < 0)
494 rxvt_fatal ("protocol error while reading pty/tty fds from helper process, aborting.\n");
495
496 return true;
497}
498
499void
500rxvt_ptytty_proxy::login (int cmd_pid, bool login_shell, const char *hostname)
501{
502 command cmd;
503
504 cmd.type = command::login;
505 cmd.id = id;
506 cmd.cmd_pid = cmd_pid;
507 cmd.login_shell = login_shell;
508 strncpy (cmd.hostname, hostname, sizeof (cmd.hostname));
509
510 write (sock_fd, &cmd, sizeof (cmd));
511}
512
513rxvt_ptytty_proxy::~rxvt_ptytty_proxy ()
514{
515 command cmd;
516
517 cmd.type = command::destroy;
518 cmd.id = id;
519
520 write (sock_fd, &cmd, sizeof (cmd));
521}
522
523static
524void serve ()
525{
526 command cmd;
527 vector<rxvt_ptytty *> ptys;
528
529 while (read (sock_fd, &cmd, sizeof (command)) == sizeof (command))
530 {
531 if (cmd.type == command::get)
532 {
533 // -> id ptyfd ttyfd
534 cmd.id = new rxvt_ptytty_unix;
535
536 if (cmd.id->get ())
537 {
538 write (sock_fd, &cmd.id, sizeof (cmd.id));
539 ptys.push_back (cmd.id);
540
541 rxvt_send_fd (sock_fd, cmd.id->pty);
542 rxvt_send_fd (sock_fd, cmd.id->tty);
543 }
544 else
545 {
546 delete cmd.id;
547 cmd.id = 0;
548 write (sock_fd, &cmd.id, sizeof (cmd.id));
549 }
550 }
551 else if (cmd.type == command::login)
552 {
553#if UTMP_SUPPORT
554 if (find (ptys.begin (), ptys.end (), cmd.id))
555 {
556 cmd.hostname[sizeof (cmd.hostname) - 1] = 0;
557 cmd.id->login (cmd.cmd_pid, cmd.login_shell, cmd.hostname);
558 }
559#endif
560 }
561 else if (cmd.type == command::destroy)
562 {
563 rxvt_ptytty **pty = find (ptys.begin (), ptys.end (), cmd.id);
564
565 if (pty)
566 {
567 delete *pty;
568 ptys.erase (pty);
569 }
570 }
571 else
572 break;
573 }
574
575 // destroy all ptys
576 for (rxvt_ptytty **i = ptys.end (); i-- > ptys.begin (); )
577 delete *i;
578}
579
580void rxvt_ptytty_server ()
581{
582 int sv[2];
583
584 if (socketpair (AF_UNIX, SOCK_STREAM, 0, sv))
585 rxvt_fatal ("could not create socket to communicate with pty/sessiondb helper, aborting.\n");
586
587 pid = fork ();
588
589 if (pid < 0)
590 rxvt_fatal ("could not create pty/sessiondb helper process, aborting.\n");
591
592 if (pid)
593 {
594 // client, urxvt
595 sock_fd = sv[0];
596 close (sv[1]);
597 fcntl (sock_fd, F_SETFD, FD_CLOEXEC);
598 }
599 else
600 {
601 // server, pty-helper
602 sock_fd = sv[1];
603
604 for (int fd = 0; fd < 1023; fd++)
605 if (fd != sock_fd)
606 close (fd);
607
608 serve ();
609 _exit (EXIT_SUCCESS);
610 }
611}
612
613#endif
614
615// a "factory" *g*
616rxvt_ptytty *
617rxvt_new_ptytty ()
618{
619#if PTYTTY_HELPER
620 if (pid > 0)
621 // use helper process
622 return new rxvt_ptytty_proxy;
623 else
624#endif
625 return new rxvt_ptytty_unix;
626}
627
313/*----------------------- end-of-file (C source) -----------------------*/ 628/*----------------------- end-of-file (C source) -----------------------*/
629

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