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wine/dlls/ntdll/server.c
Alexandre Julliard 25d6383a29 ntdll: Fix a race condition at thread exit.
2006-08-04 12:04:39 +02:00

956 lines
28 KiB
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/*
* Wine server communication
*
* Copyright (C) 1998 Alexandre Julliard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "config.h"
#include "wine/port.h"
#include <assert.h>
#include <ctype.h>
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#ifdef HAVE_SYS_SOCKET_H
# include <sys/socket.h>
#endif
#ifdef HAVE_SYS_WAIT_H
#include <sys/wait.h>
#endif
#ifdef HAVE_SYS_UN_H
#include <sys/un.h>
#endif
#ifdef HAVE_SYS_MMAN_H
#include <sys/mman.h>
#endif
#ifdef HAVE_SYS_STAT_H
# include <sys/stat.h>
#endif
#ifdef HAVE_SYS_UIO_H
#include <sys/uio.h>
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include "ntstatus.h"
#define WIN32_NO_STATUS
#include "wine/library.h"
#include "wine/pthread.h"
#include "wine/server.h"
#include "wine/debug.h"
#include "ntdll_misc.h"
WINE_DEFAULT_DEBUG_CHANNEL(server);
/* Some versions of glibc don't define this */
#ifndef SCM_RIGHTS
#define SCM_RIGHTS 1
#endif
#define SOCKETNAME "socket" /* name of the socket file */
#define LOCKNAME "lock" /* name of the lock file */
#ifndef HAVE_STRUCT_MSGHDR_MSG_ACCRIGHTS
/* data structure used to pass an fd with sendmsg/recvmsg */
struct cmsg_fd
{
struct
{
size_t len; /* size of structure */
int level; /* SOL_SOCKET */
int type; /* SCM_RIGHTS */
} header;
int fd; /* fd to pass */
};
#endif /* HAVE_STRUCT_MSGHDR_MSG_ACCRIGHTS */
abs_time_t server_start_time = { 0, 0 }; /* time of server startup */
extern struct wine_pthread_functions pthread_functions;
static sigset_t block_set; /* signals to block during server calls */
static int fd_socket = -1; /* socket to exchange file descriptors with the server */
static RTL_CRITICAL_SECTION fd_cache_section;
static RTL_CRITICAL_SECTION_DEBUG critsect_debug =
{
0, 0, &fd_cache_section,
{ &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
0, 0, { (DWORD_PTR)(__FILE__ ": fd_cache_section") }
};
static RTL_CRITICAL_SECTION fd_cache_section = { &critsect_debug, -1, 0, 0, 0, 0 };
#ifdef __GNUC__
static void fatal_error( const char *err, ... ) __attribute__((noreturn, format(printf,1,2)));
static void fatal_perror( const char *err, ... ) __attribute__((noreturn, format(printf,1,2)));
static void server_connect_error( const char *serverdir ) __attribute__((noreturn));
#endif
/* die on a fatal error; use only during initialization */
static void fatal_error( const char *err, ... )
{
va_list args;
va_start( args, err );
fprintf( stderr, "wine: " );
vfprintf( stderr, err, args );
va_end( args );
exit(1);
}
/* die on a fatal error; use only during initialization */
static void fatal_perror( const char *err, ... )
{
va_list args;
va_start( args, err );
fprintf( stderr, "wine: " );
vfprintf( stderr, err, args );
perror( " " );
va_end( args );
exit(1);
}
/***********************************************************************
* server_exit_thread
*/
void server_exit_thread( int status )
{
struct wine_pthread_thread_info info;
SIZE_T size;
int fds[4];
RtlAcquirePebLock();
RemoveEntryList( &NtCurrentTeb()->TlsLinks );
RtlReleasePebLock();
info.stack_base = NtCurrentTeb()->DeallocationStack;
info.teb_base = NtCurrentTeb();
info.teb_sel = wine_get_fs();
info.exit_status = status;
fds[0] = ntdll_get_thread_data()->wait_fd[0];
fds[1] = ntdll_get_thread_data()->wait_fd[1];
fds[2] = ntdll_get_thread_data()->reply_fd;
fds[3] = ntdll_get_thread_data()->request_fd;
pthread_functions.sigprocmask( SIG_BLOCK, &block_set, NULL );
size = 0;
NtFreeVirtualMemory( GetCurrentProcess(), &info.stack_base, &size, MEM_RELEASE | MEM_SYSTEM );
info.stack_size = size;
size = 0;
NtFreeVirtualMemory( GetCurrentProcess(), &info.teb_base, &size, MEM_RELEASE | MEM_SYSTEM );
info.teb_size = size;
close( fds[0] );
close( fds[1] );
close( fds[2] );
close( fds[3] );
pthread_functions.exit_thread( &info );
}
/***********************************************************************
* server_abort_thread
*/
void server_abort_thread( int status )
{
pthread_functions.sigprocmask( SIG_BLOCK, &block_set, NULL );
close( ntdll_get_thread_data()->wait_fd[0] );
close( ntdll_get_thread_data()->wait_fd[1] );
close( ntdll_get_thread_data()->reply_fd );
close( ntdll_get_thread_data()->request_fd );
pthread_functions.abort_thread( status );
}
/***********************************************************************
* server_protocol_error
*/
void server_protocol_error( const char *err, ... )
{
va_list args;
va_start( args, err );
fprintf( stderr, "wine client error:%lx: ", GetCurrentThreadId() );
vfprintf( stderr, err, args );
va_end( args );
server_abort_thread(1);
}
/***********************************************************************
* server_protocol_perror
*/
void server_protocol_perror( const char *err )
{
fprintf( stderr, "wine client error:%lx: ", GetCurrentThreadId() );
perror( err );
server_abort_thread(1);
}
/***********************************************************************
* send_request
*
* Send a request to the server.
*/
static void send_request( const struct __server_request_info *req )
{
unsigned int i;
int ret;
if (!req->u.req.request_header.request_size)
{
if ((ret = write( ntdll_get_thread_data()->request_fd, &req->u.req,
sizeof(req->u.req) )) == sizeof(req->u.req)) return;
}
else
{
struct iovec vec[__SERVER_MAX_DATA+1];
vec[0].iov_base = (void *)&req->u.req;
vec[0].iov_len = sizeof(req->u.req);
for (i = 0; i < req->data_count; i++)
{
vec[i+1].iov_base = (void *)req->data[i].ptr;
vec[i+1].iov_len = req->data[i].size;
}
if ((ret = writev( ntdll_get_thread_data()->request_fd, vec, i+1 )) ==
req->u.req.request_header.request_size + sizeof(req->u.req)) return;
}
if (ret >= 0) server_protocol_error( "partial write %d\n", ret );
if (errno == EPIPE) server_abort_thread(0);
server_protocol_perror( "write" );
}
/***********************************************************************
* read_reply_data
*
* Read data from the reply buffer; helper for wait_reply.
*/
static void read_reply_data( void *buffer, size_t size )
{
int ret;
for (;;)
{
if ((ret = read( ntdll_get_thread_data()->reply_fd, buffer, size )) > 0)
{
if (!(size -= ret)) return;
buffer = (char *)buffer + ret;
continue;
}
if (!ret) break;
if (errno == EINTR) continue;
if (errno == EPIPE) break;
server_protocol_perror("read");
}
/* the server closed the connection; time to die... */
server_abort_thread(0);
}
/***********************************************************************
* wait_reply
*
* Wait for a reply from the server.
*/
inline static void wait_reply( struct __server_request_info *req )
{
read_reply_data( &req->u.reply, sizeof(req->u.reply) );
if (req->u.reply.reply_header.reply_size)
read_reply_data( req->reply_data, req->u.reply.reply_header.reply_size );
}
/***********************************************************************
* wine_server_call (NTDLL.@)
*
* Perform a server call.
*
* PARAMS
* req_ptr [I/O] Function dependent data
*
* RETURNS
* Depends on server function being called, but usually an NTSTATUS code.
*
* NOTES
* Use the SERVER_START_REQ and SERVER_END_REQ to help you fill out the
* server request structure for the particular call. E.g:
*| SERVER_START_REQ( event_op )
*| {
*| req->handle = handle;
*| req->op = SET_EVENT;
*| ret = wine_server_call( req );
*| }
*| SERVER_END_REQ;
*/
unsigned int wine_server_call( void *req_ptr )
{
struct __server_request_info * const req = req_ptr;
sigset_t old_set;
pthread_functions.sigprocmask( SIG_BLOCK, &block_set, &old_set );
send_request( req );
wait_reply( req );
pthread_functions.sigprocmask( SIG_SETMASK, &old_set, NULL );
return req->u.reply.reply_header.error;
}
/***********************************************************************
* wine_server_send_fd (NTDLL.@)
*
* Send a file descriptor to the server.
*
* PARAMS
* fd [I] file descriptor to send
*
* RETURNS
* nothing
*/
void wine_server_send_fd( int fd )
{
#ifndef HAVE_STRUCT_MSGHDR_MSG_ACCRIGHTS
struct cmsg_fd cmsg;
#endif
struct send_fd data;
struct msghdr msghdr;
struct iovec vec;
int ret;
vec.iov_base = (void *)&data;
vec.iov_len = sizeof(data);
msghdr.msg_name = NULL;
msghdr.msg_namelen = 0;
msghdr.msg_iov = &vec;
msghdr.msg_iovlen = 1;
#ifdef HAVE_STRUCT_MSGHDR_MSG_ACCRIGHTS
msghdr.msg_accrights = (void *)&fd;
msghdr.msg_accrightslen = sizeof(fd);
#else /* HAVE_STRUCT_MSGHDR_MSG_ACCRIGHTS */
cmsg.header.len = sizeof(cmsg.header) + sizeof(fd);
cmsg.header.level = SOL_SOCKET;
cmsg.header.type = SCM_RIGHTS;
cmsg.fd = fd;
msghdr.msg_control = &cmsg;
msghdr.msg_controllen = sizeof(cmsg.header) + sizeof(fd);
msghdr.msg_flags = 0;
#endif /* HAVE_STRUCT_MSGHDR_MSG_ACCRIGHTS */
data.tid = GetCurrentThreadId();
data.fd = fd;
for (;;)
{
if ((ret = sendmsg( fd_socket, &msghdr, 0 )) == sizeof(data)) return;
if (ret >= 0) server_protocol_error( "partial write %d\n", ret );
if (errno == EINTR) continue;
if (errno == EPIPE) server_abort_thread(0);
server_protocol_perror( "sendmsg" );
}
}
/***********************************************************************
* receive_fd
*
* Receive a file descriptor passed from the server.
*/
static int receive_fd( obj_handle_t *handle )
{
struct iovec vec;
int ret, fd;
#ifdef HAVE_STRUCT_MSGHDR_MSG_ACCRIGHTS
struct msghdr msghdr;
fd = -1;
msghdr.msg_accrights = (void *)&fd;
msghdr.msg_accrightslen = sizeof(fd);
#else /* HAVE_STRUCT_MSGHDR_MSG_ACCRIGHTS */
struct msghdr msghdr;
struct cmsg_fd cmsg;
cmsg.header.len = sizeof(cmsg.header) + sizeof(fd);
cmsg.header.level = SOL_SOCKET;
cmsg.header.type = SCM_RIGHTS;
cmsg.fd = -1;
msghdr.msg_control = &cmsg;
msghdr.msg_controllen = sizeof(cmsg.header) + sizeof(fd);
msghdr.msg_flags = 0;
#endif /* HAVE_STRUCT_MSGHDR_MSG_ACCRIGHTS */
msghdr.msg_name = NULL;
msghdr.msg_namelen = 0;
msghdr.msg_iov = &vec;
msghdr.msg_iovlen = 1;
vec.iov_base = (void *)handle;
vec.iov_len = sizeof(*handle);
for (;;)
{
if ((ret = recvmsg( fd_socket, &msghdr, 0 )) > 0)
{
#ifndef HAVE_STRUCT_MSGHDR_MSG_ACCRIGHTS
fd = cmsg.fd;
#endif
if (fd != -1) fcntl( fd, F_SETFD, 1 ); /* set close on exec flag */
return fd;
}
if (!ret) break;
if (errno == EINTR) continue;
if (errno == EPIPE) break;
server_protocol_perror("recvmsg");
}
/* the server closed the connection; time to die... */
server_abort_thread(0);
}
/***********************************************************************
* wine_server_fd_to_handle (NTDLL.@)
*
* Allocate a file handle for a Unix file descriptor.
*
* PARAMS
* fd [I] Unix file descriptor.
* access [I] Win32 access flags.
* attributes [I] Object attributes.
* handle [O] Address where Wine file handle will be stored.
*
* RETURNS
* NTSTATUS code
*/
int wine_server_fd_to_handle( int fd, unsigned int access, unsigned int attributes, obj_handle_t *handle )
{
int ret;
*handle = 0;
wine_server_send_fd( fd );
SERVER_START_REQ( alloc_file_handle )
{
req->access = access;
req->attributes = attributes;
req->fd = fd;
if (!(ret = wine_server_call( req ))) *handle = reply->handle;
}
SERVER_END_REQ;
return ret;
}
/***********************************************************************
* wine_server_handle_to_fd (NTDLL.@)
*
* Retrieve the file descriptor corresponding to a file handle.
*
* PARAMS
* handle [I] Wine file handle.
* access [I] Win32 file access rights requested.
* unix_fd [O] Address where Unix file descriptor will be stored.
* flags [O] Address where the Unix flags associated with file will be stored. Optional.
*
* RETURNS
* NTSTATUS code
*/
int wine_server_handle_to_fd( obj_handle_t handle, unsigned int access, int *unix_fd, int *flags )
{
obj_handle_t fd_handle;
int ret, removable = -1, fd = -1;
RtlEnterCriticalSection( &fd_cache_section );
*unix_fd = -1;
for (;;)
{
SERVER_START_REQ( get_handle_fd )
{
req->handle = handle;
req->access = access;
if (!(ret = wine_server_call( req )))
{
fd = reply->fd;
removable = reply->removable;
if (flags) *flags = reply->flags;
}
}
SERVER_END_REQ;
if (ret) break;
if (fd != -1)
{
if ((fd = dup(fd)) == -1) ret = FILE_GetNtStatus();
break;
}
/* it wasn't in the cache, get it from the server */
fd = receive_fd( &fd_handle );
if (fd == -1)
{
ret = STATUS_TOO_MANY_OPENED_FILES;
break;
}
if (fd_handle != handle) removable = -1;
if (removable == -1)
{
FILE_FS_DEVICE_INFORMATION info;
if (FILE_GetDeviceInfo( fd, &info ) == STATUS_SUCCESS)
removable = (info.Characteristics & FILE_REMOVABLE_MEDIA) != 0;
}
else if (removable) break; /* don't cache it */
/* and store it back into the cache */
SERVER_START_REQ( set_handle_fd )
{
req->handle = fd_handle;
req->fd = fd;
req->removable = removable;
if (!(ret = wine_server_call( req )))
{
if (reply->cur_fd != -1) /* it has been cached */
{
if (reply->cur_fd != fd) close( fd ); /* someone was here before us */
if ((fd = dup(reply->cur_fd)) == -1) ret = FILE_GetNtStatus();
}
}
else
{
close( fd );
fd = -1;
}
}
SERVER_END_REQ;
if (ret) break;
if (fd_handle == handle) break;
/* if we received a different handle this means there was
* a race with another thread; we restart everything from
* scratch in this case.
*/
close( fd );
}
RtlLeaveCriticalSection( &fd_cache_section );
if (!ret) *unix_fd = fd;
return ret;
}
/***********************************************************************
* wine_server_release_fd (NTDLL.@)
*
* Release the Unix file descriptor returned by wine_server_handle_to_fd.
*
* PARAMS
* handle [I] Wine file handle.
* unix_fd [I] Unix file descriptor to release.
*
* RETURNS
* nothing
*/
void wine_server_release_fd( obj_handle_t handle, int unix_fd )
{
close( unix_fd );
}
/***********************************************************************
* start_server
*
* Start a new wine server.
*/
static void start_server(void)
{
static int started; /* we only try once */
char *argv[3];
static char wineserver[] = "server/wineserver";
static char debug[] = "-d";
if (!started)
{
int status;
int pid = fork();
if (pid == -1) fatal_perror( "fork" );
if (!pid)
{
argv[0] = wineserver;
argv[1] = TRACE_ON(server) ? debug : NULL;
argv[2] = NULL;
wine_exec_wine_binary( argv[0], argv, getenv("WINESERVER") );
fatal_error( "could not exec wineserver\n" );
}
waitpid( pid, &status, 0 );
status = WIFEXITED(status) ? WEXITSTATUS(status) : 1;
if (status == 2) return; /* server lock held by someone else, will retry later */
if (status) exit(status); /* server failed */
started = 1;
}
}
/***********************************************************************
* server_connect_error
*
* Try to display a meaningful explanation of why we couldn't connect
* to the server.
*/
static void server_connect_error( const char *serverdir )
{
int fd;
struct flock fl;
if ((fd = open( LOCKNAME, O_WRONLY )) == -1)
fatal_error( "for some mysterious reason, the wine server never started.\n" );
fl.l_type = F_WRLCK;
fl.l_whence = SEEK_SET;
fl.l_start = 0;
fl.l_len = 1;
if (fcntl( fd, F_GETLK, &fl ) != -1)
{
if (fl.l_type == F_WRLCK) /* the file is locked */
fatal_error( "a wine server seems to be running, but I cannot connect to it.\n"
" You probably need to kill that process (it might be pid %d).\n",
(int)fl.l_pid );
fatal_error( "for some mysterious reason, the wine server failed to run.\n" );
}
fatal_error( "the file system of '%s' doesn't support locks,\n"
" and there is a 'socket' file in that directory that prevents wine from starting.\n"
" You should make sure no wine server is running, remove that file and try again.\n",
serverdir );
}
/***********************************************************************
* server_connect
*
* Attempt to connect to an existing server socket.
* We need to be in the server directory already.
*/
static int server_connect( const char *serverdir )
{
struct sockaddr_un addr;
struct stat st;
int s, slen, retry, fd_cwd;
/* retrieve the current directory */
fd_cwd = open( ".", O_RDONLY );
if (fd_cwd != -1) fcntl( fd_cwd, F_SETFD, 1 ); /* set close on exec flag */
/* chdir to the server directory */
if (chdir( serverdir ) == -1)
{
if (errno != ENOENT) fatal_perror( "chdir to %s", serverdir );
start_server();
if (chdir( serverdir ) == -1) fatal_perror( "chdir to %s", serverdir );
}
/* make sure we are at the right place */
if (stat( ".", &st ) == -1) fatal_perror( "stat %s", serverdir );
if (st.st_uid != getuid()) fatal_error( "'%s' is not owned by you\n", serverdir );
if (st.st_mode & 077) fatal_error( "'%s' must not be accessible by other users\n", serverdir );
for (retry = 0; retry < 6; retry++)
{
/* if not the first try, wait a bit to leave the previous server time to exit */
if (retry)
{
usleep( 100000 * retry * retry );
start_server();
if (lstat( SOCKETNAME, &st ) == -1) continue; /* still no socket, wait a bit more */
}
else if (lstat( SOCKETNAME, &st ) == -1) /* check for an already existing socket */
{
if (errno != ENOENT) fatal_perror( "lstat %s/%s", serverdir, SOCKETNAME );
start_server();
if (lstat( SOCKETNAME, &st ) == -1) continue; /* still no socket, wait a bit more */
}
/* make sure the socket is sane (ISFIFO needed for Solaris) */
if (!S_ISSOCK(st.st_mode) && !S_ISFIFO(st.st_mode))
fatal_error( "'%s/%s' is not a socket\n", serverdir, SOCKETNAME );
if (st.st_uid != getuid())
fatal_error( "'%s/%s' is not owned by you\n", serverdir, SOCKETNAME );
/* try to connect to it */
addr.sun_family = AF_UNIX;
strcpy( addr.sun_path, SOCKETNAME );
slen = sizeof(addr) - sizeof(addr.sun_path) + strlen(addr.sun_path) + 1;
#ifdef HAVE_STRUCT_SOCKADDR_UN_SUN_LEN
addr.sun_len = slen;
#endif
if ((s = socket( AF_UNIX, SOCK_STREAM, 0 )) == -1) fatal_perror( "socket" );
if (connect( s, (struct sockaddr *)&addr, slen ) != -1)
{
/* switch back to the starting directory */
if (fd_cwd != -1)
{
fchdir( fd_cwd );
close( fd_cwd );
}
fcntl( s, F_SETFD, 1 ); /* set close on exec flag */
return s;
}
close( s );
}
server_connect_error( serverdir );
}
/***********************************************************************
* rm_rf
*
* Remove a directory and all its contents; helper for create_config_dir.
*/
static void rm_rf( const char *path )
{
int err = errno; /* preserve errno */
DIR *dir;
char *buffer, *p;
struct stat st;
struct dirent *de;
if (!(buffer = malloc( strlen(path) + 256 + 1 ))) goto done;
strcpy( buffer, path );
p = buffer + strlen(buffer);
*p++ = '/';
if ((dir = opendir( path )))
{
while ((de = readdir( dir )))
{
if (!strcmp( de->d_name, "." ) || !strcmp( de->d_name, ".." )) continue;
strcpy( p, de->d_name );
if (unlink( buffer ) != -1) continue;
if (errno == EISDIR ||
(errno == EPERM && !lstat( buffer, &st ) && S_ISDIR(st.st_mode)))
{
/* recurse in the sub-directory */
rm_rf( buffer );
}
}
closedir( dir );
}
free( buffer );
rmdir( path );
done:
errno = err;
}
/***********************************************************************
* create_config_dir
*
* Create the wine configuration dir (~/.wine).
*/
static void create_config_dir(void)
{
const char *config_dir = wine_get_config_dir();
char *tmp_dir;
int fd;
pid_t pid, wret;
if (!(tmp_dir = malloc( strlen(config_dir) + sizeof("-XXXXXX") )))
fatal_error( "out of memory\n" );
strcpy( tmp_dir, config_dir );
strcat( tmp_dir, "-XXXXXX" );
if ((fd = mkstemps( tmp_dir, 0 )) == -1)
fatal_perror( "can't get temp file name for %s", config_dir );
close( fd );
unlink( tmp_dir );
if (mkdir( tmp_dir, 0777 ) == -1)
fatal_perror( "cannot create temp dir %s", tmp_dir );
MESSAGE( "wine: creating configuration directory '%s'...\n", config_dir );
pid = fork();
if (pid == -1)
{
rmdir( tmp_dir );
fatal_perror( "fork" );
}
if (!pid)
{
const char *argv[6];
argv[0] = "tools/wineprefixcreate";
argv[1] = "--quiet";
argv[2] = "--wait";
argv[3] = "--prefix";
argv[4] = tmp_dir;
argv[5] = NULL;
wine_exec_wine_binary( argv[0], (char **)argv, NULL );
rmdir( tmp_dir );
fatal_perror( "could not exec wineprefixcreate" );
}
else
{
int status;
while ((wret = waitpid( pid, &status, 0 )) != pid)
{
if (wret == -1 && errno != EINTR) fatal_perror( "wait4" );
}
if (!WIFEXITED(status) || WEXITSTATUS(status))
{
rm_rf( tmp_dir );
fatal_error( "wineprefixcreate failed while creating '%s'.\n", config_dir );
}
}
if (rename( tmp_dir, config_dir ) == -1)
{
rm_rf( tmp_dir );
if (errno != EEXIST && errno != ENOTEMPTY)
fatal_perror( "rename '%s' to '%s'", tmp_dir, config_dir );
/* else it was probably created by a concurrent wine process */
}
free( tmp_dir );
MESSAGE( "wine: '%s' created successfully.\n", config_dir );
}
/***********************************************************************
* server_init_process
*
* Start the server and create the initial socket pair.
*/
void server_init_process(void)
{
obj_handle_t dummy_handle;
const char *env_socket = getenv( "WINESERVERSOCKET" );
if (env_socket)
{
fd_socket = atoi( env_socket );
if (fcntl( fd_socket, F_SETFD, 1 ) == -1)
fatal_perror( "Bad server socket %d", fd_socket );
}
else
{
const char *server_dir = wine_get_server_dir();
if (!server_dir) /* this means the config dir doesn't exist */
{
create_config_dir();
server_dir = wine_get_server_dir();
}
/* connect to the server */
fd_socket = server_connect( server_dir );
}
/* setup the signal mask */
sigemptyset( &block_set );
sigaddset( &block_set, SIGALRM );
sigaddset( &block_set, SIGIO );
sigaddset( &block_set, SIGINT );
sigaddset( &block_set, SIGHUP );
sigaddset( &block_set, SIGUSR1 );
sigaddset( &block_set, SIGUSR2 );
sigaddset( &block_set, SIGCHLD );
/* receive the first thread request fd on the main socket */
ntdll_get_thread_data()->request_fd = receive_fd( &dummy_handle );
}
/***********************************************************************
* server_init_thread
*
* Send an init thread request. Return 0 if OK.
*/
size_t server_init_thread( int unix_pid, int unix_tid, void *entry_point )
{
int version, ret;
int reply_pipe[2];
struct sigaction sig_act;
size_t info_size;
sig_act.sa_handler = SIG_IGN;
sig_act.sa_flags = 0;
sigemptyset( &sig_act.sa_mask );
/* ignore SIGPIPE so that we get an EPIPE error instead */
sigaction( SIGPIPE, &sig_act, NULL );
/* automatic child reaping to avoid zombies */
#ifdef SA_NOCLDWAIT
sig_act.sa_flags |= SA_NOCLDWAIT;
#endif
sigaction( SIGCHLD, &sig_act, NULL );
/* create the server->client communication pipes */
if (pipe( reply_pipe ) == -1) server_protocol_perror( "pipe" );
if (pipe( ntdll_get_thread_data()->wait_fd ) == -1) server_protocol_perror( "pipe" );
wine_server_send_fd( reply_pipe[1] );
wine_server_send_fd( ntdll_get_thread_data()->wait_fd[1] );
ntdll_get_thread_data()->reply_fd = reply_pipe[0];
close( reply_pipe[1] );
/* set close on exec flag */
fcntl( ntdll_get_thread_data()->reply_fd, F_SETFD, 1 );
fcntl( ntdll_get_thread_data()->wait_fd[0], F_SETFD, 1 );
fcntl( ntdll_get_thread_data()->wait_fd[1], F_SETFD, 1 );
SERVER_START_REQ( init_thread )
{
req->unix_pid = unix_pid;
req->unix_tid = unix_tid;
req->teb = NtCurrentTeb();
req->peb = NtCurrentTeb()->Peb;
req->entry = entry_point;
req->ldt_copy = &wine_ldt_copy;
req->reply_fd = reply_pipe[1];
req->wait_fd = ntdll_get_thread_data()->wait_fd[1];
req->debug_level = (TRACE_ON(server) != 0);
ret = wine_server_call( req );
NtCurrentTeb()->ClientId.UniqueProcess = (HANDLE)reply->pid;
NtCurrentTeb()->ClientId.UniqueThread = (HANDLE)reply->tid;
info_size = reply->info_size;
version = reply->version;
server_start_time = reply->server_start;
}
SERVER_END_REQ;
if (ret) server_protocol_error( "init_thread failed with status %x\n", ret );
if (version != SERVER_PROTOCOL_VERSION)
server_protocol_error( "version mismatch %d/%d.\n"
"Your %s binary was not upgraded correctly,\n"
"or you have an older one somewhere in your PATH.\n"
"Or maybe the wrong wineserver is still running?\n",
version, SERVER_PROTOCOL_VERSION,
(version > SERVER_PROTOCOL_VERSION) ? "wine" : "wineserver" );
return info_size;
}
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