2 * Client part of the client/server communication
4 * Copyright (C) 1998 Alexandre Julliard
17 #include <sys/types.h>
18 #ifdef HAVE_SYS_SOCKET_H
19 # include <sys/socket.h>
21 #ifdef HAVE_SYS_WAIT_H
25 #ifdef HAVE_SYS_MMAN_H
39 /* Some versions of glibc don't define this */
44 #define CONFDIR "/.wine" /* directory for Wine config relative to $HOME */
45 #define SERVERDIR "/wineserver-" /* server socket directory (hostname appended) */
46 #define SOCKETNAME "socket" /* name of the socket file */
48 /* data structure used to pass an fd with sendmsg/recvmsg */
51 int len; /* sizeof structure */
52 int level; /* SOL_SOCKET */
53 int type; /* SCM_RIGHTS */
54 int fd; /* fd to pass */
57 static void *boot_thread_id;
60 /* die on a fatal error; use only during initialization */
61 static void fatal_error( const char *err, ... ) WINE_NORETURN;
62 static void fatal_error( const char *err, ... )
66 va_start( args, err );
67 fprintf( stderr, "wine: " );
68 vfprintf( stderr, err, args );
73 /* die on a fatal error; use only during initialization */
74 static void fatal_perror( const char *err, ... ) WINE_NORETURN;
75 static void fatal_perror( const char *err, ... )
79 va_start( args, err );
80 fprintf( stderr, "wine: " );
81 vfprintf( stderr, err, args );
87 /***********************************************************************
88 * server_protocol_error
90 void server_protocol_error( const char *err, ... )
94 va_start( args, err );
95 fprintf( stderr, "Client protocol error:%p: ", NtCurrentTeb()->tid );
96 vfprintf( stderr, err, args );
98 SYSDEPS_ExitThread(1);
102 /***********************************************************************
105 static void server_perror( const char *err )
107 fprintf( stderr, "Client protocol error:%p: ", NtCurrentTeb()->tid );
109 SYSDEPS_ExitThread(1);
113 /***********************************************************************
116 * Send a request to the server.
118 static void send_request( enum request req )
121 if ((ret = write( NtCurrentTeb()->socket, &req, sizeof(req) )) == sizeof(req))
125 if (errno == EPIPE) SYSDEPS_ExitThread(0);
126 server_perror( "sendmsg" );
128 server_protocol_error( "partial msg sent %d/%d\n", ret, sizeof(req) );
131 /***********************************************************************
134 * Send a request to the server, passing a file descriptor.
136 static void send_request_fd( enum request req, int fd )
139 #ifndef HAVE_MSGHDR_ACCRIGHTS
142 struct msghdr msghdr;
145 vec.iov_base = (void *)&req;
146 vec.iov_len = sizeof(req);
148 msghdr.msg_name = NULL;
149 msghdr.msg_namelen = 0;
150 msghdr.msg_iov = &vec;
151 msghdr.msg_iovlen = 1;
153 #ifdef HAVE_MSGHDR_ACCRIGHTS
154 msghdr.msg_accrights = (void *)&fd;
155 msghdr.msg_accrightslen = sizeof(fd);
156 #else /* HAVE_MSGHDR_ACCRIGHTS */
157 cmsg.len = sizeof(cmsg);
158 cmsg.level = SOL_SOCKET;
159 cmsg.type = SCM_RIGHTS;
161 msghdr.msg_control = &cmsg;
162 msghdr.msg_controllen = sizeof(cmsg);
163 msghdr.msg_flags = 0;
164 #endif /* HAVE_MSGHDR_ACCRIGHTS */
166 if ((ret = sendmsg( NtCurrentTeb()->socket, &msghdr, 0 )) == sizeof(req)) return;
169 if (errno == EPIPE) SYSDEPS_ExitThread(0);
170 server_perror( "sendmsg" );
172 server_protocol_error( "partial msg sent %d/%d\n", ret, sizeof(req) );
175 /***********************************************************************
178 * Wait for a reply from the server.
180 static unsigned int wait_reply(void)
187 if ((ret = read( NtCurrentTeb()->socket, &res, sizeof(res) )) == sizeof(res))
192 if (errno == EINTR) continue;
193 if (errno == EPIPE) break;
194 server_perror("read");
196 server_protocol_error( "partial msg received %d/%d\n", ret, sizeof(res) );
198 /* the server closed the connection; time to die... */
199 SYSDEPS_ExitThread(0);
203 /***********************************************************************
206 * Wait for a reply from the server, when a file descriptor is passed.
208 static unsigned int wait_reply_fd( int *fd )
214 #ifdef HAVE_MSGHDR_ACCRIGHTS
215 struct msghdr msghdr;
218 msghdr.msg_accrights = (void *)fd;
219 msghdr.msg_accrightslen = sizeof(*fd);
220 #else /* HAVE_MSGHDR_ACCRIGHTS */
221 struct msghdr msghdr;
224 cmsg.len = sizeof(cmsg);
225 cmsg.level = SOL_SOCKET;
226 cmsg.type = SCM_RIGHTS;
228 msghdr.msg_control = &cmsg;
229 msghdr.msg_controllen = sizeof(cmsg);
230 msghdr.msg_flags = 0;
231 #endif /* HAVE_MSGHDR_ACCRIGHTS */
233 msghdr.msg_name = NULL;
234 msghdr.msg_namelen = 0;
235 msghdr.msg_iov = &vec;
236 msghdr.msg_iovlen = 1;
237 vec.iov_base = (void *)&res;
238 vec.iov_len = sizeof(res);
242 if ((ret = recvmsg( NtCurrentTeb()->socket, &msghdr, 0 )) == sizeof(res))
244 #ifndef HAVE_MSGHDR_ACCRIGHTS
252 if (errno == EINTR) continue;
253 if (errno == EPIPE) break;
254 server_perror("recvmsg");
256 server_protocol_error( "partial seq received %d/%d\n", ret, sizeof(res) );
258 /* the server closed the connection; time to die... */
259 SYSDEPS_ExitThread(0);
263 /***********************************************************************
266 * Perform a server call.
268 unsigned int server_call_noerr( enum request req )
275 /***********************************************************************
278 * Perform a server call, passing a file descriptor.
279 * If *fd is != -1, it will be passed to the server.
280 * If the server passes an fd, it will be stored into *fd.
282 unsigned int server_call_fd( enum request req, int fd_out, int *fd_in )
286 if (fd_out == -1) send_request( req );
287 else send_request_fd( req, fd_out );
289 if (fd_in) res = wait_reply_fd( fd_in );
290 else res = wait_reply();
291 if (res) SetLastError( RtlNtStatusToDosError(res) );
292 return res; /* error code */
296 /***********************************************************************
299 * Return the configuration directory ($WINEPREFIX or $HOME/.wine)
301 const char *get_config_dir(void)
303 static char *confdir;
306 const char *prefix = getenv( "WINEPREFIX" );
309 int len = strlen(prefix);
310 if (!(confdir = strdup( prefix ))) fatal_error( "out of memory\n" );
311 if (len > 1 && confdir[len-1] == '/') confdir[len-1] = 0;
315 const char *home = getenv( "HOME" );
318 struct passwd *pwd = getpwuid( getuid() );
319 if (!pwd) fatal_error( "could not find your home directory\n" );
322 if (!(confdir = malloc( strlen(home) + strlen(CONFDIR) + 1 )))
323 fatal_error( "out of memory\n" );
324 strcpy( confdir, home );
325 strcat( confdir, CONFDIR );
327 mkdir( confdir, 0755 ); /* just in case */
333 /***********************************************************************
336 * Start a new wine server.
338 static void start_server( const char *oldcwd )
340 static int started; /* we only try once */
345 if (pid == -1) fatal_perror( "fork" );
349 /* first try the installation dir */
350 execl( BINDIR "/wineserver", "wineserver", NULL );
351 if (oldcwd) chdir( oldcwd );
352 /* now try the dir we were launched from */
353 if (!(path = malloc( strlen(argv0) + 20 )))
354 fatal_error( "out of memory\n" );
355 if ((p = strrchr( strcpy( path, argv0 ), '/' )))
357 strcpy( p, "/wineserver" );
358 execl( path, "wineserver", NULL );
359 strcpy( p, "/server/wineserver" );
360 execl( path, "wineserver", NULL );
362 /* now try the path */
363 execlp( "wineserver", "wineserver", NULL );
364 /* and finally the current dir */
365 execl( "./server/wineserver", "wineserver", NULL );
366 fatal_error( "could not exec wineserver\n" );
369 waitpid( pid, &status, 0 );
370 status = WIFEXITED(status) ? WEXITSTATUS(status) : 1;
371 if (status) exit(status); /* server failed */
375 /***********************************************************************
378 * Attempt to connect to an existing server socket.
379 * We need to be in the server directory already.
381 static int server_connect( const char *oldcwd, const char *serverdir )
383 struct sockaddr_un addr;
387 /* chdir to the server directory */
388 if (chdir( serverdir ) == -1)
390 if (errno != ENOENT) fatal_perror( "chdir to %s", serverdir );
391 start_server( NULL );
392 if (chdir( serverdir ) == -1) fatal_perror( "chdir to %s", serverdir );
395 /* make sure we are at the right place */
396 if (stat( ".", &st ) == -1) fatal_perror( "stat %s", serverdir );
397 if (st.st_uid != getuid()) fatal_error( "'%s' is not owned by you\n", serverdir );
398 if (st.st_mode & 077) fatal_error( "'%s' must not be accessible by other users\n", serverdir );
400 /* check for an existing socket */
401 if (lstat( SOCKETNAME, &st ) == -1)
403 if (errno != ENOENT) fatal_perror( "lstat %s/%s", serverdir, SOCKETNAME );
404 start_server( oldcwd );
405 if (lstat( SOCKETNAME, &st ) == -1) fatal_perror( "lstat %s/%s", serverdir, SOCKETNAME );
408 /* make sure the socket is sane */
409 if (!S_ISSOCK(st.st_mode))
410 fatal_error( "'%s/%s' is not a socket\n", serverdir, SOCKETNAME );
411 if (st.st_uid != getuid())
412 fatal_error( "'%s/%s' is not owned by you\n", serverdir, SOCKETNAME );
414 /* try to connect to it */
415 addr.sun_family = AF_UNIX;
416 strcpy( addr.sun_path, SOCKETNAME );
417 slen = sizeof(addr) - sizeof(addr.sun_path) + strlen(addr.sun_path) + 1;
418 #ifdef HAVE_SOCKADDR_SUN_LEN
421 if ((s = socket( AF_UNIX, SOCK_STREAM, 0 )) == -1) fatal_perror( "socket" );
422 if (connect( s, (struct sockaddr *)&addr, slen ) == -1)
425 /* wait a bit and retry with a new socket */
427 if ((s = socket( AF_UNIX, SOCK_STREAM, 0 )) == -1) fatal_perror( "socket" );
428 if (connect( s, (struct sockaddr *)&addr, slen ) == -1)
429 fatal_error( "file '%s/%s' exists,\n"
430 " but I cannot connect to it; maybe the server has crashed?\n"
431 " If this is the case, you should remove this socket file and try again.\n",
432 serverdir, SOCKETNAME );
434 fcntl( s, F_SETFD, 1 ); /* set close on exec flag */
439 /***********************************************************************
442 * Start the server and create the initial socket pair.
444 int CLIENT_InitServer(void)
448 char *oldcwd, *serverdir;
449 const char *configdir;
451 /* retrieve the current directory */
452 for (size = 512; ; size *= 2)
454 if (!(oldcwd = malloc( size ))) break;
455 if (getcwd( oldcwd, size )) break;
457 if (errno == ERANGE) continue;
462 /* if argv[0] is a relative path, make it absolute */
464 if (oldcwd && argv0[0] != '/' && strchr( argv0, '/' ))
466 char *new_argv0 = malloc( strlen(oldcwd) + strlen(argv0) + 2 );
469 strcpy( new_argv0, oldcwd );
470 strcat( new_argv0, "/" );
471 strcat( new_argv0, argv0 );
472 full_argv0 = new_argv0;
476 /* get the server directory name */
477 if (gethostname( hostname, sizeof(hostname) ) == -1) fatal_perror( "gethostname" );
478 configdir = get_config_dir();
479 serverdir = malloc( strlen(configdir) + strlen(SERVERDIR) + strlen(hostname) + 1 );
480 if (!serverdir) fatal_error( "out of memory\n" );
481 strcpy( serverdir, configdir );
482 strcat( serverdir, SERVERDIR );
483 strcat( serverdir, hostname );
485 /* connect to the server */
486 fd = server_connect( oldcwd, serverdir );
488 /* switch back to the starting directory */
498 /***********************************************************************
501 * Send an init thread request. Return 0 if OK.
503 int CLIENT_InitThread(void)
505 struct get_thread_buffer_request *first_req;
506 struct init_thread_request *req;
507 TEB *teb = NtCurrentTeb();
510 /* ignore SIGPIPE so that we get a EPIPE error instead */
511 signal( SIGPIPE, SIG_IGN );
513 if (wait_reply_fd( &fd ) || (fd == -1))
514 server_protocol_error( "no fd passed on first request\n" );
515 if ((teb->buffer_size = lseek( fd, 0, SEEK_END )) == -1) server_perror( "lseek" );
516 teb->buffer = mmap( 0, teb->buffer_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0 );
518 if (teb->buffer == (void*)-1) server_perror( "mmap" );
519 first_req = teb->buffer;
520 teb->pid = first_req->pid;
521 teb->tid = first_req->tid;
522 if (first_req->version != SERVER_PROTOCOL_VERSION)
523 server_protocol_error( "version mismatch %d/%d.\n"
524 "Your %s binary was not upgraded correctly,\n"
525 "or you have an older one somewhere in your PATH.\n",
526 first_req->version, SERVER_PROTOCOL_VERSION,
527 (first_req->version > SERVER_PROTOCOL_VERSION) ? "wine" : "wineserver" );
528 if (first_req->boot) boot_thread_id = teb->tid;
529 else if (boot_thread_id == teb->tid) boot_thread_id = 0;
532 req->unix_pid = getpid();
534 req->entry = teb->entry_point;
535 return server_call_noerr( REQ_INIT_THREAD );
538 /***********************************************************************
541 * Signal that we have finished booting, and set debug level.
543 int CLIENT_BootDone( int debug_level )
545 struct boot_done_request *req = get_req_buffer();
546 req->debug_level = debug_level;
547 return server_call( REQ_BOOT_DONE );
551 /***********************************************************************
552 * CLIENT_IsBootThread
554 * Return TRUE if current thread is the boot thread.
556 int CLIENT_IsBootThread(void)
558 return (GetCurrentThreadId() == (DWORD)boot_thread_id);