1 /*
2 * Server-side request handling
3 *
4 * Copyright (C) 1998 Alexandre Julliard
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
19 */
20
21 #include "config.h"
22 #include "wine/port.h"
23
24 #include <assert.h>
25 #include <errno.h>
26 #include <fcntl.h>
27 #ifdef HAVE_PWD_H
28 #include <pwd.h>
29 #endif
30 #include <signal.h>
31 #include <stdio.h>
32 #include <stdlib.h>
33 #include <stdarg.h>
34 #include <string.h>
35 #include <sys/stat.h>
36 #include <sys/time.h>
37 #include <sys/types.h>
38 #ifdef HAVE_SYS_SOCKET_H
39 # include <sys/socket.h>
40 #endif
41 #ifdef HAVE_SYS_WAIT_H
42 # include <sys/wait.h>
43 #endif
44 #ifdef HAVE_SYS_UIO_H
45 #include <sys/uio.h>
46 #endif
47 #ifdef HAVE_SYS_UN_H
48 #include <sys/un.h>
49 #endif
50 #include <unistd.h>
51 #ifdef HAVE_POLL_H
52 #include <poll.h>
53 #endif
54
55 #include "ntstatus.h"
56 #define WIN32_NO_STATUS
57 #include "windef.h"
58 #include "winbase.h"
59 #include "wincon.h"
60 #include "winternl.h"
61 #include "wine/library.h"
62
63 #include "file.h"
64 #include "process.h"
65 #define WANT_REQUEST_HANDLERS
66 #include "request.h"
67
68 /* Some versions of glibc don't define this */
69 #ifndef SCM_RIGHTS
70 #define SCM_RIGHTS 1
71 #endif
72
73 /* path names for server master Unix socket */
74 static const char * const server_socket_name = "socket"; /* name of the socket file */
75 static const char * const server_lock_name = "lock"; /* name of the server lock file */
76
77 struct master_socket
78 {
79 struct object obj; /* object header */
80 struct fd *fd; /* file descriptor of the master socket */
81 };
82
83 static void master_socket_dump( struct object *obj, int verbose );
84 static void master_socket_destroy( struct object *obj );
85 static void master_socket_poll_event( struct fd *fd, int event );
86
87 static const struct object_ops master_socket_ops =
88 {
89 sizeof(struct master_socket), /* size */
90 master_socket_dump, /* dump */
91 no_get_type, /* get_type */
92 no_add_queue, /* add_queue */
93 NULL, /* remove_queue */
94 NULL, /* signaled */
95 NULL, /* satisfied */
96 no_signal, /* signal */
97 no_get_fd, /* get_fd */
98 no_map_access, /* map_access */
99 default_get_sd, /* get_sd */
100 default_set_sd, /* set_sd */
101 no_lookup_name, /* lookup_name */
102 no_open_file, /* open_file */
103 no_close_handle, /* close_handle */
104 master_socket_destroy /* destroy */
105 };
106
107 static const struct fd_ops master_socket_fd_ops =
108 {
109 NULL, /* get_poll_events */
110 master_socket_poll_event, /* poll_event */
111 NULL, /* flush */
112 NULL, /* get_fd_type */
113 NULL, /* ioctl */
114 NULL, /* queue_async */
115 NULL, /* reselect_async */
116 NULL /* cancel_async */
117 };
118
119
120 struct thread *current = NULL; /* thread handling the current request */
121 unsigned int global_error = 0; /* global error code for when no thread is current */
122 timeout_t server_start_time = 0; /* server startup time */
123 int server_dir_fd = -1; /* file descriptor for the server dir */
124 int config_dir_fd = -1; /* file descriptor for the config dir */
125
126 static struct master_socket *master_socket; /* the master socket object */
127 static struct timeout_user *master_timeout;
128
129 /* socket communication static structures */
130 static struct iovec myiovec;
131 static struct msghdr msghdr;
132 #ifndef HAVE_STRUCT_MSGHDR_MSG_ACCRIGHTS
133 struct cmsg_fd
134 {
135 struct
136 {
137 size_t len; /* size of structure */
138 int level; /* SOL_SOCKET */
139 int type; /* SCM_RIGHTS */
140 } header;
141 int fd; /* fd to pass */
142 };
143 static struct cmsg_fd cmsg = { { sizeof(cmsg.header) + sizeof(cmsg.fd), SOL_SOCKET, SCM_RIGHTS }, -1 };
144 #endif /* HAVE_STRUCT_MSGHDR_MSG_ACCRIGHTS */
145
146 /* complain about a protocol error and terminate the client connection */
147 void fatal_protocol_error( struct thread *thread, const char *err, ... )
148 {
149 va_list args;
150
151 va_start( args, err );
152 fprintf( stderr, "Protocol error:%04x: ", thread->id );
153 vfprintf( stderr, err, args );
154 va_end( args );
155 thread->exit_code = 1;
156 kill_thread( thread, 1 );
157 }
158
159 /* complain about a protocol error and terminate the client connection */
160 void fatal_protocol_perror( struct thread *thread, const char *err, ... )
161 {
162 va_list args;
163
164 va_start( args, err );
165 fprintf( stderr, "Protocol error:%04x: ", thread->id );
166 vfprintf( stderr, err, args );
167 perror( " " );
168 va_end( args );
169 thread->exit_code = 1;
170 kill_thread( thread, 1 );
171 }
172
173 /* die on a fatal error */
174 void fatal_error( const char *err, ... )
175 {
176 va_list args;
177
178 va_start( args, err );
179 fprintf( stderr, "wineserver: " );
180 vfprintf( stderr, err, args );
181 va_end( args );
182 exit(1);
183 }
184
185 /* die on a fatal error */
186 void fatal_perror( const char *err, ... )
187 {
188 va_list args;
189
190 va_start( args, err );
191 fprintf( stderr, "wineserver: " );
192 vfprintf( stderr, err, args );
193 perror( " " );
194 va_end( args );
195 exit(1);
196 }
197
198 /* allocate the reply data */
199 void *set_reply_data_size( data_size_t size )
200 {
201 assert( size <= get_reply_max_size() );
202 if (size && !(current->reply_data = mem_alloc( size ))) size = 0;
203 current->reply_size = size;
204 return current->reply_data;
205 }
206
207 /* write the remaining part of the reply */
208 void write_reply( struct thread *thread )
209 {
210 int ret;
211
212 if ((ret = write( get_unix_fd( thread->reply_fd ),
213 (char *)thread->reply_data + thread->reply_size - thread->reply_towrite,
214 thread->reply_towrite )) >= 0)
215 {
216 if (!(thread->reply_towrite -= ret))
217 {
218 free( thread->reply_data );
219 thread->reply_data = NULL;
220 /* sent everything, can go back to waiting for requests */
221 set_fd_events( thread->request_fd, POLLIN );
222 set_fd_events( thread->reply_fd, 0 );
223 }
224 return;
225 }
226 if (errno == EPIPE)
227 kill_thread( thread, 0 ); /* normal death */
228 else if (errno != EWOULDBLOCK && errno != EAGAIN)
229 fatal_protocol_perror( thread, "reply write" );
230 }
231
232 /* send a reply to the current thread */
233 static void send_reply( union generic_reply *reply )
234 {
235 int ret;
236
237 if (!current->reply_size)
238 {
239 if ((ret = write( get_unix_fd( current->reply_fd ),
240 reply, sizeof(*reply) )) != sizeof(*reply)) goto error;
241 }
242 else
243 {
244 struct iovec vec[2];
245
246 vec[0].iov_base = (void *)reply;
247 vec[0].iov_len = sizeof(*reply);
248 vec[1].iov_base = current->reply_data;
249 vec[1].iov_len = current->reply_size;
250
251 if ((ret = writev( get_unix_fd( current->reply_fd ), vec, 2 )) < sizeof(*reply)) goto error;
252
253 if ((current->reply_towrite = current->reply_size - (ret - sizeof(*reply))))
254 {
255 /* couldn't write it all, wait for POLLOUT */
256 set_fd_events( current->reply_fd, POLLOUT );
257 set_fd_events( current->request_fd, 0 );
258 return;
259 }
260 }
261 free( current->reply_data );
262 current->reply_data = NULL;
263 return;
264
265 error:
266 if (ret >= 0)
267 fatal_protocol_error( current, "partial write %d\n", ret );
268 else if (errno == EPIPE)
269 kill_thread( current, 0 ); /* normal death */
270 else
271 fatal_protocol_perror( current, "reply write" );
272 }
273
274 /* call a request handler */
275 static void call_req_handler( struct thread *thread )
276 {
277 union generic_reply reply;
278 enum request req = thread->req.request_header.req;
279
280 current = thread;
281 current->reply_size = 0;
282 clear_error();
283 memset( &reply, 0, sizeof(reply) );
284
285 if (debug_level) trace_request();
286
287 if (req < REQ_NB_REQUESTS)
288 req_handlers[req]( ¤t->req, &reply );
289 else
290 set_error( STATUS_NOT_IMPLEMENTED );
291
292 if (current)
293 {
294 if (current->reply_fd)
295 {
296 reply.reply_header.error = current->error;
297 reply.reply_header.reply_size = current->reply_size;
298 if (debug_level) trace_reply( req, &reply );
299 send_reply( &reply );
300 }
301 else
302 {
303 current->exit_code = 1;
304 kill_thread( current, 1 ); /* no way to continue without reply fd */
305 }
306 }
307 current = NULL;
308 }
309
310 /* read a request from a thread */
311 void read_request( struct thread *thread )
312 {
313 int ret;
314
315 if (!thread->req_toread) /* no pending request */
316 {
317 if ((ret = read( get_unix_fd( thread->request_fd ), &thread->req,
318 sizeof(thread->req) )) != sizeof(thread->req)) goto error;
319 if (!(thread->req_toread = thread->req.request_header.request_size))
320 {
321 /* no data, handle request at once */
322 call_req_handler( thread );
323 return;
324 }
325 if (!(thread->req_data = malloc( thread->req_toread )))
326 {
327 fatal_protocol_error( thread, "no memory for %u bytes request %d\n",
328 thread->req_toread, thread->req.request_header.req );
329 return;
330 }
331 }
332
333 /* read the variable sized data */
334 for (;;)
335 {
336 ret = read( get_unix_fd( thread->request_fd ),
337 (char *)thread->req_data + thread->req.request_header.request_size
338 - thread->req_toread,
339 thread->req_toread );
340 if (ret <= 0) break;
341 if (!(thread->req_toread -= ret))
342 {
343 call_req_handler( thread );
344 free( thread->req_data );
345 thread->req_data = NULL;
346 return;
347 }
348 }
349
350 error:
351 if (!ret) /* closed pipe */
352 kill_thread( thread, 0 );
353 else if (ret > 0)
354 fatal_protocol_error( thread, "partial read %d\n", ret );
355 else if (errno != EWOULDBLOCK && errno != EAGAIN)
356 fatal_protocol_perror( thread, "read" );
357 }
358
359 /* receive a file descriptor on the process socket */
360 int receive_fd( struct process *process )
361 {
362 struct send_fd data;
363 int fd, ret;
364
365 #ifdef HAVE_STRUCT_MSGHDR_MSG_ACCRIGHTS
366 msghdr.msg_accrightslen = sizeof(int);
367 msghdr.msg_accrights = (void *)&fd;
368 #else /* HAVE_STRUCT_MSGHDR_MSG_ACCRIGHTS */
369 msghdr.msg_control = &cmsg;
370 msghdr.msg_controllen = sizeof(cmsg.header) + sizeof(fd);
371 cmsg.fd = -1;
372 #endif /* HAVE_STRUCT_MSGHDR_MSG_ACCRIGHTS */
373
374 myiovec.iov_base = (void *)&data;
375 myiovec.iov_len = sizeof(data);
376
377 ret = recvmsg( get_unix_fd( process->msg_fd ), &msghdr, 0 );
378 #ifndef HAVE_STRUCT_MSGHDR_MSG_ACCRIGHTS
379 fd = cmsg.fd;
380 #endif
381
382 if (ret == sizeof(data))
383 {
384 struct thread *thread;
385
386 if (data.tid) thread = get_thread_from_id( data.tid );
387 else thread = (struct thread *)grab_object( get_process_first_thread( process ));
388
389 if (!thread || thread->process != process || thread->state == TERMINATED)
390 {
391 if (debug_level)
392 fprintf( stderr, "%04x: *fd* %d <- %d bad thread id\n",
393 data.tid, data.fd, fd );
394 close( fd );
395 }
396 else
397 {
398 if (debug_level)
399 fprintf( stderr, "%04x: *fd* %d <- %d\n",
400 thread->id, data.fd, fd );
401 thread_add_inflight_fd( thread, data.fd, fd );
402 }
403 if (thread) release_object( thread );
404 return 0;
405 }
406
407 if (!ret)
408 {
409 kill_process( process, 0 );
410 }
411 else if (ret > 0)
412 {
413 fprintf( stderr, "Protocol error: process %04x: partial recvmsg %d for fd\n",
414 process->id, ret );
415 kill_process( process, 1 );
416 }
417 else
418 {
419 if (errno != EWOULDBLOCK && errno != EAGAIN)
420 {
421 fprintf( stderr, "Protocol error: process %04x: ", process->id );
422 perror( "recvmsg" );
423 kill_process( process, 1 );
424 }
425 }
426 return -1;
427 }
428
429 /* send an fd to a client */
430 int send_client_fd( struct process *process, int fd, obj_handle_t handle )
431 {
432 int ret;
433
434 if (debug_level)
435 fprintf( stderr, "%04x: *fd* %p -> %d\n",
436 current ? current->id : process->id, handle, fd );
437
438 #ifdef HAVE_STRUCT_MSGHDR_MSG_ACCRIGHTS
439 msghdr.msg_accrightslen = sizeof(fd);
440 msghdr.msg_accrights = (void *)&fd;
441 #else /* HAVE_STRUCT_MSGHDR_MSG_ACCRIGHTS */
442 msghdr.msg_control = &cmsg;
443 msghdr.msg_controllen = sizeof(cmsg.header) + sizeof(fd);
444 cmsg.fd = fd;
445 #endif /* HAVE_STRUCT_MSGHDR_MSG_ACCRIGHTS */
446
447 myiovec.iov_base = (void *)&handle;
448 myiovec.iov_len = sizeof(handle);
449
450 ret = sendmsg( get_unix_fd( process->msg_fd ), &msghdr, 0 );
451
452 if (ret == sizeof(handle)) return 0;
453
454 if (ret >= 0)
455 {
456 fprintf( stderr, "Protocol error: process %04x: partial sendmsg %d\n", process->id, ret );
457 kill_process( process, 1 );
458 }
459 else if (errno == EPIPE)
460 {
461 kill_process( process, 0 );
462 }
463 else
464 {
465 fprintf( stderr, "Protocol error: process %04x: ", process->id );
466 perror( "sendmsg" );
467 kill_process( process, 1 );
468 }
469 return -1;
470 }
471
472 /* get current tick count to return to client */
473 unsigned int get_tick_count(void)
474 {
475 return (current_time - server_start_time) / 10000;
476 }
477
478 static void master_socket_dump( struct object *obj, int verbose )
479 {
480 struct master_socket *sock = (struct master_socket *)obj;
481 assert( obj->ops == &master_socket_ops );
482 fprintf( stderr, "Master socket fd=%p\n", sock->fd );
483 }
484
485 static void master_socket_destroy( struct object *obj )
486 {
487 struct master_socket *sock = (struct master_socket *)obj;
488 assert( obj->ops == &master_socket_ops );
489 release_object( sock->fd );
490 }
491
492 /* handle a socket event */
493 static void master_socket_poll_event( struct fd *fd, int event )
494 {
495 struct master_socket *sock = get_fd_user( fd );
496 assert( master_socket->obj.ops == &master_socket_ops );
497
498 assert( sock == master_socket ); /* there is only one master socket */
499
500 if (event & (POLLERR | POLLHUP))
501 {
502 /* this is not supposed to happen */
503 fprintf( stderr, "wineserver: Error on master socket\n" );
504 set_fd_events( sock->fd, -1 );
505 }
506 else if (event & POLLIN)
507 {
508 struct sockaddr_un dummy;
509 unsigned int len = sizeof(dummy);
510 int client = accept( get_unix_fd( master_socket->fd ), (struct sockaddr *) &dummy, &len );
511 if (client == -1) return;
512 fcntl( client, F_SETFL, O_NONBLOCK );
513 create_process( client, NULL, 0 );
514 }
515 }
516
517 /* remove the socket upon exit */
518 static void socket_cleanup(void)
519 {
520 static int do_it_once;
521 if (!do_it_once++) unlink( server_socket_name );
522 }
523
524 /* create a directory and check its permissions */
525 static void create_dir( const char *name, struct stat *st )
526 {
527 if (lstat( name, st ) == -1)
528 {
529 if (errno != ENOENT) fatal_perror( "lstat %s", name );
530 if (mkdir( name, 0700 ) == -1 && errno != EEXIST) fatal_perror( "mkdir %s", name );
531 if (lstat( name, st ) == -1) fatal_perror( "lstat %s", name );
532 }
533 if (!S_ISDIR(st->st_mode)) fatal_error( "%s is not a directory\n", name );
534 if (st->st_uid != getuid()) fatal_error( "%s is not owned by you\n", name );
535 if (st->st_mode & 077) fatal_error( "%s must not be accessible by other users\n", name );
536 }
537
538 /* create the server directory and chdir to it */
539 static void create_server_dir( const char *dir )
540 {
541 char *p, *server_dir;
542 struct stat st, st2;
543
544 if (!(server_dir = strdup( dir ))) fatal_error( "out of memory\n" );
545
546 /* first create the base directory if needed */
547
548 p = strrchr( server_dir, '/' );
549 *p = 0;
550 create_dir( server_dir, &st );
551
552 /* now create the server directory */
553
554 *p = '/';
555 create_dir( server_dir, &st );
556
557 if (chdir( server_dir ) == -1) fatal_perror( "chdir %s", server_dir );
558 if ((server_dir_fd = open( ".", O_RDONLY )) == -1) fatal_perror( "open %s", server_dir );
559 if (fstat( server_dir_fd, &st2 ) == -1) fatal_perror( "stat %s", server_dir );
560 if (st.st_dev != st2.st_dev || st.st_ino != st2.st_ino)
561 fatal_error( "chdir did not end up in %s\n", server_dir );
562
563 free( server_dir );
564 }
565
566 /* create the lock file and return its file descriptor */
567 static int create_server_lock(void)
568 {
569 struct stat st;
570 int fd;
571
572 if (lstat( server_lock_name, &st ) == -1)
573 {
574 if (errno != ENOENT)
575 fatal_perror( "lstat %s/%s", wine_get_server_dir(), server_lock_name );
576 }
577 else
578 {
579 if (!S_ISREG(st.st_mode))
580 fatal_error( "%s/%s is not a regular file\n", wine_get_server_dir(), server_lock_name );
581 }
582
583 if ((fd = open( server_lock_name, O_CREAT|O_TRUNC|O_WRONLY, 0600 )) == -1)
584 fatal_perror( "error creating %s/%s", wine_get_server_dir(), server_lock_name );
585 return fd;
586 }
587
588 /* wait for the server lock */
589 int wait_for_lock(void)
590 {
591 const char *server_dir = wine_get_server_dir();
592 int fd, r;
593 struct flock fl;
594
595 if (!server_dir) return 0; /* no server dir, so no lock to wait on */
596
597 create_server_dir( server_dir );
598 fd = create_server_lock();
599
600 fl.l_type = F_WRLCK;
601 fl.l_whence = SEEK_SET;
602 fl.l_start = 0;
603 fl.l_len = 1;
604 r = fcntl( fd, F_SETLKW, &fl );
605 close(fd);
606
607 return r;
608 }
609
610 /* kill the wine server holding the lock */
611 int kill_lock_owner( int sig )
612 {
613 const char *server_dir = wine_get_server_dir();
614 int fd, i, ret = 0;
615 pid_t pid = 0;
616 struct flock fl;
617
618 if (!server_dir) return 0; /* no server dir, nothing to do */
619
620 create_server_dir( server_dir );
621 fd = create_server_lock();
622
623 for (i = 1; i <= 20; i++)
624 {
625 fl.l_type = F_WRLCK;
626 fl.l_whence = SEEK_SET;
627 fl.l_start = 0;
628 fl.l_len = 1;
629 if (fcntl( fd, F_GETLK, &fl ) == -1) goto done;
630 if (fl.l_type != F_WRLCK) goto done; /* the file is not locked */
631 if (!pid) /* first time around */
632 {
633 if (!(pid = fl.l_pid)) goto done; /* shouldn't happen */
634 if (sig == -1)
635 {
636 if (kill( pid, SIGINT ) == -1) goto done;
637 kill( pid, SIGCONT );
638 ret = 1;
639 }
640 else /* just send the specified signal and return */
641 {
642 ret = (kill( pid, sig ) != -1);
643 goto done;
644 }
645 }
646 else if (fl.l_pid != pid) goto done; /* no longer the same process */
647 usleep( 50000 * i );
648 }
649 /* waited long enough, now kill it */
650 kill( pid, SIGKILL );
651
652 done:
653 close( fd );
654 return ret;
655 }
656
657 /* acquire the main server lock */
658 static void acquire_lock(void)
659 {
660 struct sockaddr_un addr;
661 struct stat st;
662 struct flock fl;
663 int fd, slen, got_lock = 0;
664
665 fd = create_server_lock();
666
667 fl.l_type = F_WRLCK;
668 fl.l_whence = SEEK_SET;
669 fl.l_start = 0;
670 fl.l_len = 1;
671 if (fcntl( fd, F_SETLK, &fl ) != -1)
672 {
673 /* check for crashed server */
674 if (stat( server_socket_name, &st ) != -1 && /* there is a leftover socket */
675 stat( "core", &st ) != -1 && st.st_size) /* and there is a non-empty core file */
676 {
677 fprintf( stderr,
678 "Warning: a previous instance of the wine server seems to have crashed.\n"
679 "Please run 'gdb %s %s/core',\n"
680 "type 'backtrace' at the gdb prompt and report the results. Thanks.\n\n",
681 server_argv0, wine_get_server_dir() );
682 }
683 unlink( server_socket_name ); /* we got the lock, we can safely remove the socket */
684 got_lock = 1;
685 /* in that case we reuse fd without closing it, this ensures
686 * that we hold the lock until the process exits */
687 }
688 else
689 {
690 switch(errno)
691 {
692 case ENOLCK:
693 break;
694 case EACCES:
695 /* check whether locks work at all on this file system */
696 if (fcntl( fd, F_GETLK, &fl ) == -1) break;
697 /* fall through */
698 case EAGAIN:
699 exit(2); /* we didn't get the lock, exit with special status */
700 default:
701 fatal_perror( "fcntl %s/%s", wine_get_server_dir(), server_lock_name );
702 }
703 /* it seems we can't use locks on this fs, so we will use the socket existence as lock */
704 close( fd );
705 }
706
707 if ((fd = socket( AF_UNIX, SOCK_STREAM, 0 )) == -1) fatal_perror( "socket" );
708 addr.sun_family = AF_UNIX;
709 strcpy( addr.sun_path, server_socket_name );
710 slen = sizeof(addr) - sizeof(addr.sun_path) + strlen(addr.sun_path) + 1;
711 #ifdef HAVE_STRUCT_SOCKADDR_UN_SUN_LEN
712 addr.sun_len = slen;
713 #endif
714 if (bind( fd, (struct sockaddr *)&addr, slen ) == -1)
715 {
716 if ((errno == EEXIST) || (errno == EADDRINUSE))
717 {
718 if (got_lock)
719 fatal_error( "couldn't bind to the socket even though we hold the lock\n" );
720 exit(2); /* we didn't get the lock, exit with special status */
721 }
722 fatal_perror( "bind" );
723 }
724 atexit( socket_cleanup );
725 chmod( server_socket_name, 0600 ); /* make sure no other user can connect */
726 if (listen( fd, 5 ) == -1) fatal_perror( "listen" );
727
728 if (!(master_socket = alloc_object( &master_socket_ops )) ||
729 !(master_socket->fd = create_anonymous_fd( &master_socket_fd_ops, fd, &master_socket->obj, 0 )))
730 fatal_error( "out of memory\n" );
731 set_fd_events( master_socket->fd, POLLIN );
732 make_object_static( &master_socket->obj );
733 }
734
735 /* open the master server socket and start waiting for new clients */
736 void open_master_socket(void)
737 {
738 const char *server_dir = wine_get_server_dir();
739 const char *config_dir = wine_get_config_dir();
740 int fd, pid, status, sync_pipe[2];
741 char dummy;
742
743 /* make sure no request is larger than the maximum size */
744 assert( sizeof(union generic_request) == sizeof(struct request_max_size) );
745 assert( sizeof(union generic_reply) == sizeof(struct request_max_size) );
746
747 if (!server_dir) fatal_error( "directory %s cannot be accessed\n", config_dir );
748 if (chdir( config_dir ) == -1) fatal_perror( "chdir to %s", config_dir );
749 if ((config_dir_fd = open( ".", O_RDONLY )) == -1) fatal_perror( "open %s", config_dir );
750
751 create_server_dir( server_dir );
752
753 if (!foreground)
754 {
755 if (pipe( sync_pipe ) == -1) fatal_perror( "pipe" );
756 pid = fork();
757 switch( pid )
758 {
759 case 0: /* child */
760 setsid();
761 close( sync_pipe[0] );
762
763 acquire_lock();
764
765 /* close stdin and stdout */
766 if ((fd = open( "/dev/null", O_RDWR )) != -1)
767 {
768 dup2( fd, 0 );
769 dup2( fd, 1 );
770 close( fd );
771 }
772
773 /* signal parent */
774 dummy = 0;
775 write( sync_pipe[1], &dummy, 1 );
776 close( sync_pipe[1] );
777 break;
778
779 case -1:
780 fatal_perror( "fork" );
781 break;
782
783 default: /* parent */
784 close( sync_pipe[1] );
785
786 /* wait for child to signal us and then exit */
787 if (read( sync_pipe[0], &dummy, 1 ) == 1) _exit(0);
788
789 /* child terminated, propagate exit status */
790 wait4( pid, &status, 0, NULL );
791 if (WIFEXITED(status)) _exit( WEXITSTATUS(status) );
792 _exit(1);
793 }
794 }
795 else /* remain in the foreground */
796 {
797 acquire_lock();
798 }
799
800 /* setup msghdr structure constant fields */
801 msghdr.msg_name = NULL;
802 msghdr.msg_namelen = 0;
803 msghdr.msg_iov = &myiovec;
804 msghdr.msg_iovlen = 1;
805
806 /* init the process tracing mechanism */
807 init_tracing_mechanism();
808 }
809
810 /* master socket timer expiration handler */
811 static void close_socket_timeout( void *arg )
812 {
813 master_timeout = NULL;
814 flush_registry();
815 if (debug_level) fprintf( stderr, "wineserver: exiting (pid=%ld)\n", (long) getpid() );
816
817 #ifdef DEBUG_OBJECTS
818 close_objects(); /* shut down everything properly */
819 #endif
820 exit( 0 );
821 }
822
823 /* close the master socket and stop waiting for new clients */
824 void close_master_socket( timeout_t timeout )
825 {
826 if (master_socket)
827 {
828 release_object( master_socket );
829 master_socket = NULL;
830 }
831 if (master_timeout) /* cancel previous timeout */
832 remove_timeout_user( master_timeout );
833
834 master_timeout = add_timeout_user( timeout, close_socket_timeout, NULL );
835 }
836
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