2 * Wine server communication
4 * Copyright (C) 1998 Alexandre Julliard
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.
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.
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 #include "wine/port.h"
33 #include <sys/types.h>
34 #ifdef HAVE_SYS_SOCKET_H
35 # include <sys/socket.h>
37 #ifdef HAVE_SYS_WAIT_H
43 #ifdef HAVE_SYS_MMAN_H
56 #include "wine/library.h"
57 #include "wine/pthread.h"
58 #include "wine/server.h"
59 #include "wine/debug.h"
61 #include "ntdll_misc.h"
63 WINE_DEFAULT_DEBUG_CHANNEL(server
);
65 /* Some versions of glibc don't define this */
70 #define SOCKETNAME "socket" /* name of the socket file */
71 #define LOCKNAME "lock" /* name of the lock file */
73 #ifndef HAVE_STRUCT_MSGHDR_MSG_ACCRIGHTS
74 /* data structure used to pass an fd with sendmsg/recvmsg */
77 int len
; /* size of structure */
78 int level
; /* SOL_SOCKET */
79 int type
; /* SCM_RIGHTS */
80 int fd
; /* fd to pass */
82 #endif /* HAVE_STRUCT_MSGHDR_MSG_ACCRIGHTS */
84 static sigset_t block_set
; /* signals to block during server calls */
85 static int fd_socket
= -1; /* socket to exchange file descriptors with the server */
88 static void fatal_error( const char *err
, ... ) __attribute__((noreturn
, format(printf
,1,2)));
89 static void fatal_perror( const char *err
, ... ) __attribute__((noreturn
, format(printf
,1,2)));
90 static void server_connect_error( const char *serverdir
) __attribute__((noreturn
));
93 /* die on a fatal error; use only during initialization */
94 static void fatal_error( const char *err
, ... )
98 va_start( args
, err
);
99 fprintf( stderr
, "wine: " );
100 vfprintf( stderr
, err
, args
);
105 /* die on a fatal error; use only during initialization */
106 static void fatal_perror( const char *err
, ... )
110 va_start( args
, err
);
111 fprintf( stderr
, "wine: " );
112 vfprintf( stderr
, err
, args
);
119 /***********************************************************************
120 * server_abort_thread
122 void server_abort_thread( int status
)
124 sigprocmask( SIG_BLOCK
, &block_set
, NULL
);
125 close( NtCurrentTeb()->wait_fd
[0] );
126 close( NtCurrentTeb()->wait_fd
[1] );
127 close( NtCurrentTeb()->reply_fd
);
128 close( NtCurrentTeb()->request_fd
);
129 wine_pthread_abort_thread( status
);
133 /***********************************************************************
134 * server_protocol_error
136 void server_protocol_error( const char *err
, ... )
140 va_start( args
, err
);
141 fprintf( stderr
, "wine client error:%lx: ", GetCurrentThreadId() );
142 vfprintf( stderr
, err
, args
);
144 server_abort_thread(1);
148 /***********************************************************************
149 * server_protocol_perror
151 void server_protocol_perror( const char *err
)
153 fprintf( stderr
, "wine client error:%lx: ", GetCurrentThreadId() );
155 server_abort_thread(1);
159 /***********************************************************************
162 * Send a request to the server.
164 static void send_request( const struct __server_request_info
*req
)
168 if (!req
->u
.req
.request_header
.request_size
)
170 if ((ret
= write( NtCurrentTeb()->request_fd
, &req
->u
.req
,
171 sizeof(req
->u
.req
) )) == sizeof(req
->u
.req
)) return;
176 struct iovec vec
[__SERVER_MAX_DATA
+1];
178 vec
[0].iov_base
= (void *)&req
->u
.req
;
179 vec
[0].iov_len
= sizeof(req
->u
.req
);
180 for (i
= 0; i
< req
->data_count
; i
++)
182 vec
[i
+1].iov_base
= (void *)req
->data
[i
].ptr
;
183 vec
[i
+1].iov_len
= req
->data
[i
].size
;
185 if ((ret
= writev( NtCurrentTeb()->request_fd
, vec
, i
+1 )) ==
186 req
->u
.req
.request_header
.request_size
+ sizeof(req
->u
.req
)) return;
189 if (ret
>= 0) server_protocol_error( "partial write %d\n", ret
);
190 if (errno
== EPIPE
) server_abort_thread(0);
191 server_protocol_perror( "write" );
195 /***********************************************************************
198 * Read data from the reply buffer; helper for wait_reply.
200 static void read_reply_data( void *buffer
, size_t size
)
206 if ((ret
= read( NtCurrentTeb()->reply_fd
, buffer
, size
)) > 0)
208 if (!(size
-= ret
)) return;
209 buffer
= (char *)buffer
+ ret
;
213 if (errno
== EINTR
) continue;
214 if (errno
== EPIPE
) break;
215 server_protocol_perror("read");
217 /* the server closed the connection; time to die... */
218 server_abort_thread(0);
222 /***********************************************************************
225 * Wait for a reply from the server.
227 inline static void wait_reply( struct __server_request_info
*req
)
229 read_reply_data( &req
->u
.reply
, sizeof(req
->u
.reply
) );
230 if (req
->u
.reply
.reply_header
.reply_size
)
231 read_reply_data( req
->reply_data
, req
->u
.reply
.reply_header
.reply_size
);
235 /***********************************************************************
236 * wine_server_call (NTDLL.@)
238 * Perform a server call.
240 unsigned int wine_server_call( void *req_ptr
)
242 struct __server_request_info
* const req
= req_ptr
;
245 sigprocmask( SIG_BLOCK
, &block_set
, &old_set
);
248 sigprocmask( SIG_SETMASK
, &old_set
, NULL
);
249 return req
->u
.reply
.reply_header
.error
;
253 /***********************************************************************
254 * wine_server_send_fd
256 * Send a file descriptor to the server.
258 void wine_server_send_fd( int fd
)
260 #ifndef HAVE_STRUCT_MSGHDR_MSG_ACCRIGHTS
264 struct msghdr msghdr
;
268 vec
.iov_base
= (void *)&data
;
269 vec
.iov_len
= sizeof(data
);
271 msghdr
.msg_name
= NULL
;
272 msghdr
.msg_namelen
= 0;
273 msghdr
.msg_iov
= &vec
;
274 msghdr
.msg_iovlen
= 1;
276 #ifdef HAVE_STRUCT_MSGHDR_MSG_ACCRIGHTS
277 msghdr
.msg_accrights
= (void *)&fd
;
278 msghdr
.msg_accrightslen
= sizeof(fd
);
279 #else /* HAVE_STRUCT_MSGHDR_MSG_ACCRIGHTS */
280 cmsg
.len
= sizeof(cmsg
);
281 cmsg
.level
= SOL_SOCKET
;
282 cmsg
.type
= SCM_RIGHTS
;
284 msghdr
.msg_control
= &cmsg
;
285 msghdr
.msg_controllen
= sizeof(cmsg
);
286 msghdr
.msg_flags
= 0;
287 #endif /* HAVE_STRUCT_MSGHDR_MSG_ACCRIGHTS */
289 data
.tid
= GetCurrentThreadId();
294 if ((ret
= sendmsg( fd_socket
, &msghdr
, 0 )) == sizeof(data
)) return;
295 if (ret
>= 0) server_protocol_error( "partial write %d\n", ret
);
296 if (errno
== EINTR
) continue;
297 if (errno
== EPIPE
) server_abort_thread(0);
298 server_protocol_perror( "sendmsg" );
303 /***********************************************************************
306 * Receive a file descriptor passed from the server.
308 static int receive_fd( obj_handle_t
*handle
)
313 #ifdef HAVE_STRUCT_MSGHDR_MSG_ACCRIGHTS
314 struct msghdr msghdr
;
317 msghdr
.msg_accrights
= (void *)&fd
;
318 msghdr
.msg_accrightslen
= sizeof(fd
);
319 #else /* HAVE_STRUCT_MSGHDR_MSG_ACCRIGHTS */
320 struct msghdr msghdr
;
323 cmsg
.len
= sizeof(cmsg
);
324 cmsg
.level
= SOL_SOCKET
;
325 cmsg
.type
= SCM_RIGHTS
;
327 msghdr
.msg_control
= &cmsg
;
328 msghdr
.msg_controllen
= sizeof(cmsg
);
329 msghdr
.msg_flags
= 0;
330 #endif /* HAVE_STRUCT_MSGHDR_MSG_ACCRIGHTS */
332 msghdr
.msg_name
= NULL
;
333 msghdr
.msg_namelen
= 0;
334 msghdr
.msg_iov
= &vec
;
335 msghdr
.msg_iovlen
= 1;
336 vec
.iov_base
= (void *)handle
;
337 vec
.iov_len
= sizeof(*handle
);
341 if ((ret
= recvmsg( fd_socket
, &msghdr
, 0 )) > 0)
343 #ifndef HAVE_STRUCT_MSGHDR_MSG_ACCRIGHTS
346 if (fd
== -1) server_protocol_error( "no fd received for handle %d\n", *handle
);
347 fcntl( fd
, F_SETFD
, 1 ); /* set close on exec flag */
351 if (errno
== EINTR
) continue;
352 if (errno
== EPIPE
) break;
353 server_protocol_perror("recvmsg");
355 /* the server closed the connection; time to die... */
356 server_abort_thread(0);
360 /***********************************************************************
363 * Store the cached fd value for a given handle back into the server.
364 * Returns the new fd, which can be different if there was already an
365 * fd in the cache for that handle.
367 inline static int store_cached_fd( int *fd
, obj_handle_t handle
)
371 SERVER_START_REQ( set_handle_info
)
373 req
->handle
= handle
;
377 if (!(ret
= wine_server_call( req
)))
379 if (reply
->cur_fd
!= *fd
)
381 /* someone was here before us */
397 /***********************************************************************
398 * wine_server_fd_to_handle (NTDLL.@)
400 * Allocate a file handle for a Unix fd.
402 int wine_server_fd_to_handle( int fd
, unsigned int access
, int inherit
, obj_handle_t
*handle
)
407 wine_server_send_fd( fd
);
409 SERVER_START_REQ( alloc_file_handle
)
411 req
->access
= access
;
412 req
->inherit
= inherit
;
414 if (!(ret
= wine_server_call( req
))) *handle
= reply
->handle
;
421 /***********************************************************************
422 * wine_server_handle_to_fd (NTDLL.@)
424 * Retrieve the Unix fd corresponding to a file handle.
426 int wine_server_handle_to_fd( obj_handle_t handle
, unsigned int access
, int *unix_fd
,
427 enum fd_type
*type
, int *flags
)
429 obj_handle_t fd_handle
;
435 SERVER_START_REQ( get_handle_fd
)
437 req
->handle
= handle
;
438 req
->access
= access
;
439 if (!(ret
= wine_server_call( req
))) fd
= reply
->fd
;
440 if (type
) *type
= reply
->type
;
441 if (flags
) *flags
= reply
->flags
;
448 /* it wasn't in the cache, get it from the server */
449 fd
= receive_fd( &fd_handle
);
450 /* and store it back into the cache */
451 ret
= store_cached_fd( &fd
, fd_handle
);
454 if (fd_handle
== handle
) break;
455 /* if we received a different handle this means there was
456 * a race with another thread; we restart everything from
457 * scratch in this case.
461 if ((fd
!= -1) && ((fd
= dup(fd
)) == -1)) return STATUS_TOO_MANY_OPENED_FILES
;
463 return STATUS_SUCCESS
;
467 /***********************************************************************
468 * wine_server_release_fd (NTDLL.@)
470 * Release the Unix fd returned by wine_server_handle_to_fd.
472 void wine_server_release_fd( obj_handle_t handle
, int unix_fd
)
478 /***********************************************************************
481 * Start a new wine server.
483 static void start_server( const char *oldcwd
)
485 static int started
; /* we only try once */
493 if (pid
== -1) fatal_perror( "fork" );
496 argv
[0] = "wineserver";
497 argv
[1] = TRACE_ON(server
) ? "-d" : NULL
;
499 /* if server is explicitly specified, use this */
500 if ((p
= getenv("WINESERVER")))
502 if (p
[0] != '/' && oldcwd
[0] == '/') /* make it an absolute path */
504 if (!(path
= malloc( strlen(oldcwd
) + strlen(p
) + 1 )))
505 fatal_error( "out of memory\n" );
506 sprintf( path
, "%s/%s", oldcwd
, p
);
509 wine_exec_wine_binary( p
, argv
, NULL
, FALSE
);
510 fatal_perror( "could not exec the server '%s'\n"
511 " specified in the WINESERVER environment variable", p
);
513 /* now use the standard search strategy */
514 wine_exec_wine_binary( argv
[0], argv
, NULL
, FALSE
);
515 fatal_error( "could not exec wineserver\n" );
517 waitpid( pid
, &status
, 0 );
518 status
= WIFEXITED(status
) ? WEXITSTATUS(status
) : 1;
519 if (status
== 2) return; /* server lock held by someone else, will retry later */
520 if (status
) exit(status
); /* server failed */
526 /***********************************************************************
527 * server_connect_error
529 * Try to display a meaningful explanation of why we couldn't connect
532 static void server_connect_error( const char *serverdir
)
537 if ((fd
= open( LOCKNAME
, O_WRONLY
)) == -1)
538 fatal_error( "for some mysterious reason, the wine server never started.\n" );
541 fl
.l_whence
= SEEK_SET
;
544 if (fcntl( fd
, F_GETLK
, &fl
) != -1)
546 if (fl
.l_type
== F_WRLCK
) /* the file is locked */
547 fatal_error( "a wine server seems to be running, but I cannot connect to it.\n"
548 " You probably need to kill that process (it might be pid %d).\n",
550 fatal_error( "for some mysterious reason, the wine server failed to run.\n" );
552 fatal_error( "the file system of '%s' doesn't support locks,\n"
553 " and there is a 'socket' file in that directory that prevents wine from starting.\n"
554 " You should make sure no wine server is running, remove that file and try again.\n",
559 /***********************************************************************
562 * Attempt to connect to an existing server socket.
563 * We need to be in the server directory already.
565 static int server_connect( const char *oldcwd
, const char *serverdir
)
567 struct sockaddr_un addr
;
571 /* chdir to the server directory */
572 if (chdir( serverdir
) == -1)
574 if (errno
!= ENOENT
) fatal_perror( "chdir to %s", serverdir
);
576 if (chdir( serverdir
) == -1) fatal_perror( "chdir to %s", serverdir
);
579 /* make sure we are at the right place */
580 if (stat( ".", &st
) == -1) fatal_perror( "stat %s", serverdir
);
581 if (st
.st_uid
!= getuid()) fatal_error( "'%s' is not owned by you\n", serverdir
);
582 if (st
.st_mode
& 077) fatal_error( "'%s' must not be accessible by other users\n", serverdir
);
584 for (retry
= 0; retry
< 6; retry
++)
586 /* if not the first try, wait a bit to leave the previous server time to exit */
589 usleep( 100000 * retry
* retry
);
590 start_server( oldcwd
);
591 if (lstat( SOCKETNAME
, &st
) == -1) continue; /* still no socket, wait a bit more */
593 else if (lstat( SOCKETNAME
, &st
) == -1) /* check for an already existing socket */
595 if (errno
!= ENOENT
) fatal_perror( "lstat %s/%s", serverdir
, SOCKETNAME
);
596 start_server( oldcwd
);
597 if (lstat( SOCKETNAME
, &st
) == -1) continue; /* still no socket, wait a bit more */
600 /* make sure the socket is sane (ISFIFO needed for Solaris) */
601 if (!S_ISSOCK(st
.st_mode
) && !S_ISFIFO(st
.st_mode
))
602 fatal_error( "'%s/%s' is not a socket\n", serverdir
, SOCKETNAME
);
603 if (st
.st_uid
!= getuid())
604 fatal_error( "'%s/%s' is not owned by you\n", serverdir
, SOCKETNAME
);
606 /* try to connect to it */
607 addr
.sun_family
= AF_UNIX
;
608 strcpy( addr
.sun_path
, SOCKETNAME
);
609 slen
= sizeof(addr
) - sizeof(addr
.sun_path
) + strlen(addr
.sun_path
) + 1;
610 #ifdef HAVE_STRUCT_SOCKADDR_UN_SUN_LEN
613 if ((s
= socket( AF_UNIX
, SOCK_STREAM
, 0 )) == -1) fatal_perror( "socket" );
614 if (connect( s
, (struct sockaddr
*)&addr
, slen
) != -1)
616 fcntl( s
, F_SETFD
, 1 ); /* set close on exec flag */
621 server_connect_error( serverdir
);
625 /***********************************************************************
628 * Remove a directory and all its contents; helper for create_config_dir.
630 static void rm_rf( const char *path
)
632 int err
= errno
; /* preserve errno */
638 if (!(buffer
= malloc( strlen(path
) + 256 + 1 ))) goto done
;
639 strcpy( buffer
, path
);
640 p
= buffer
+ strlen(buffer
);
643 if ((dir
= opendir( path
)))
645 while ((de
= readdir( dir
)))
647 if (!strcmp( de
->d_name
, "." ) || !strcmp( de
->d_name
, ".." )) continue;
648 strcpy( p
, de
->d_name
);
649 if (unlink( buffer
) != -1) continue;
650 if (errno
== EISDIR
||
651 (errno
== EPERM
&& !lstat( buffer
, &st
) && S_ISDIR(st
.st_mode
)))
653 /* recurse in the sub-directory */
666 /***********************************************************************
669 * Create the wine configuration dir (~/.wine).
671 static void create_config_dir(void)
673 const char *config_dir
= wine_get_config_dir();
678 if (!(tmp_dir
= malloc( strlen(config_dir
) + sizeof("-XXXXXX") )))
679 fatal_error( "out of memory\n" );
680 strcpy( tmp_dir
, config_dir
);
681 strcat( tmp_dir
, "-XXXXXX" );
682 if ((fd
= mkstemps( tmp_dir
, 0 )) == -1)
683 fatal_perror( "can't get temp file name for %s", config_dir
);
686 if (mkdir( tmp_dir
, 0777 ) == -1)
687 fatal_perror( "cannot create temp dir %s", tmp_dir
);
689 MESSAGE( "wine: creating configuration directory '%s'...\n", config_dir
);
694 fatal_perror( "fork" );
700 argv
[0] = "wineprefixcreate";
702 argv
[2] = "--prefix";
705 wine_exec_wine_binary( argv
[0], (char **)argv
, NULL
, FALSE
);
707 fatal_perror( "could not exec wineprefixcreate" );
713 while ((wret
= waitpid( pid
, &status
, 0 )) != pid
)
715 if (wret
== -1 && errno
!= EINTR
) fatal_perror( "wait4" );
717 if (!WIFEXITED(status
) || WEXITSTATUS(status
))
720 fatal_error( "wineprefixcreate failed while creating '%s'.\n", config_dir
);
723 if (rename( tmp_dir
, config_dir
) == -1)
726 if (errno
!= EEXIST
&& errno
!= ENOTEMPTY
)
727 fatal_perror( "rename '%s' to '%s'", tmp_dir
, config_dir
);
728 /* else it was probably created by a concurrent wine process */
731 MESSAGE( "wine: '%s' created successfully.\n", config_dir
);
735 /***********************************************************************
736 * server_init_process
738 * Start the server and create the initial socket pair.
740 void server_init_process(void)
744 obj_handle_t dummy_handle
;
745 const char *server_dir
= wine_get_server_dir();
747 if (!server_dir
) /* this means the config dir doesn't exist */
750 server_dir
= wine_get_server_dir();
753 /* retrieve the current directory */
754 for (size
= 512; ; size
*= 2)
756 if (!(oldcwd
= malloc( size
))) break;
757 if (getcwd( oldcwd
, size
)) break;
759 if (errno
== ERANGE
) continue;
764 /* connect to the server */
765 fd_socket
= server_connect( oldcwd
, server_dir
);
767 /* switch back to the starting directory */
774 /* setup the signal mask */
775 sigemptyset( &block_set
);
776 sigaddset( &block_set
, SIGALRM
);
777 sigaddset( &block_set
, SIGIO
);
778 sigaddset( &block_set
, SIGINT
);
779 sigaddset( &block_set
, SIGHUP
);
780 sigaddset( &block_set
, SIGUSR1
);
781 sigaddset( &block_set
, SIGUSR2
);
783 /* receive the first thread request fd on the main socket */
784 NtCurrentTeb()->request_fd
= receive_fd( &dummy_handle
);
788 /***********************************************************************
791 * Send an init thread request. Return 0 if OK.
793 void server_init_thread( int unix_pid
, int unix_tid
, void *entry_point
)
795 TEB
*teb
= NtCurrentTeb();
798 struct sigaction sig_act
;
800 sig_act
.sa_handler
= SIG_IGN
;
801 sig_act
.sa_flags
= 0;
802 sigemptyset( &sig_act
.sa_mask
);
804 /* ignore SIGPIPE so that we get a EPIPE error instead */
805 sigaction( SIGPIPE
, &sig_act
, NULL
);
806 /* automatic child reaping to avoid zombies */
808 sig_act
.sa_flags
|= SA_NOCLDWAIT
;
810 sigaction( SIGCHLD
, &sig_act
, NULL
);
812 /* create the server->client communication pipes */
813 if (pipe( reply_pipe
) == -1) server_protocol_perror( "pipe" );
814 if (pipe( teb
->wait_fd
) == -1) server_protocol_perror( "pipe" );
815 wine_server_send_fd( reply_pipe
[1] );
816 wine_server_send_fd( teb
->wait_fd
[1] );
817 teb
->reply_fd
= reply_pipe
[0];
818 close( reply_pipe
[1] );
820 /* set close on exec flag */
821 fcntl( teb
->reply_fd
, F_SETFD
, 1 );
822 fcntl( teb
->wait_fd
[0], F_SETFD
, 1 );
823 fcntl( teb
->wait_fd
[1], F_SETFD
, 1 );
825 SERVER_START_REQ( init_thread
)
827 req
->unix_pid
= unix_pid
;
828 req
->unix_tid
= unix_tid
;
830 req
->entry
= entry_point
;
831 req
->reply_fd
= reply_pipe
[1];
832 req
->wait_fd
= teb
->wait_fd
[1];
833 ret
= wine_server_call( req
);
834 teb
->ClientId
.UniqueProcess
= (HANDLE
)reply
->pid
;
835 teb
->ClientId
.UniqueThread
= (HANDLE
)reply
->tid
;
836 version
= reply
->version
;
840 if (ret
) server_protocol_error( "init_thread failed with status %x\n", ret
);
841 if (version
!= SERVER_PROTOCOL_VERSION
)
842 server_protocol_error( "version mismatch %d/%d.\n"
843 "Your %s binary was not upgraded correctly,\n"
844 "or you have an older one somewhere in your PATH.\n"
845 "Or maybe the wrong wineserver is still running?\n",
846 version
, SERVER_PROTOCOL_VERSION
,
847 (version
> SERVER_PROTOCOL_VERSION
) ? "wine" : "wineserver" );