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wine/dlls/ntdll/server.c

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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>
#ifdef HAVE_DIRENT_H
# include <dirent.h>
#endif
#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_SYS_THR_H
#include <sys/ucontext.h>
#include <sys/thr.h>
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include "ntstatus.h"
#define WIN32_NO_STATUS
#include "wine/library.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
#ifndef MSG_CMSG_CLOEXEC
#define MSG_CMSG_CLOEXEC 0
#endif
#define SOCKETNAME "socket" /* name of the socket file */
#define LOCKNAME "lock" /* name of the lock file */
#ifdef __i386__
static const enum cpu_type client_cpu = CPU_x86;
#elif defined(__x86_64__)
static const enum cpu_type client_cpu = CPU_x86_64;
#elif defined(__ALPHA__)
static const enum cpu_type client_cpu = CPU_ALPHA;
#elif defined(__powerpc__)
static const enum cpu_type client_cpu = CPU_POWERPC;
#elif defined(__sparc__)
static const enum cpu_type client_cpu = CPU_SPARC;
#else
#error Unsupported CPU
#endif
unsigned int server_cpus = 0;
int is_wow64 = FALSE;
#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 */
timeout_t server_start_time = 0; /* time of server startup */
sigset_t server_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_protocol_error
*/
void server_protocol_error( const char *err, ... )
{
va_list args;
va_start( args, err );
fprintf( stderr, "wine client error:%x: ", GetCurrentThreadId() );
vfprintf( stderr, err, args );
va_end( args );
abort_thread(1);
}
/***********************************************************************
* server_protocol_perror
*/
void server_protocol_perror( const char *err )
{
fprintf( stderr, "wine client error:%x: ", GetCurrentThreadId() );
perror( err );
abort_thread(1);
}
/***********************************************************************
* send_request
*
* Send a request to the server.
*/
static unsigned int 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 STATUS_SUCCESS;
}
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 STATUS_SUCCESS;
}
if (ret >= 0) server_protocol_error( "partial write %d\n", ret );
if (errno == EPIPE) abort_thread(0);
if (errno == EFAULT) return STATUS_ACCESS_VIOLATION;
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... */
abort_thread(0);
}
/***********************************************************************
* wait_reply
*
* Wait for a reply from the server.
*/
static inline unsigned int 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 );
return req->u.reply.reply_header.error;
}
/***********************************************************************
* 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;
unsigned int ret;
pthread_sigmask( SIG_BLOCK, &server_block_set, &old_set );
ret = send_request( req );
if (!ret) ret = wait_reply( req );
pthread_sigmask( SIG_SETMASK, &old_set, NULL );
return ret;
}
/***********************************************************************
* server_enter_uninterrupted_section
*/
void server_enter_uninterrupted_section( RTL_CRITICAL_SECTION *cs, sigset_t *sigset )
{
pthread_sigmask( SIG_BLOCK, &server_block_set, sigset );
RtlEnterCriticalSection( cs );
}
/***********************************************************************
* server_leave_uninterrupted_section
*/
void server_leave_uninterrupted_section( RTL_CRITICAL_SECTION *cs, sigset_t *sigset )
{
RtlLeaveCriticalSection( cs );
pthread_sigmask( SIG_SETMASK, sigset, NULL );
}
/***********************************************************************
* wine_server_send_fd (NTDLL.@)
*
* Send a file descriptor to the server.
*
* PARAMS
* fd [I] file descriptor to send
*
* RETURNS
* nothing
*/
void CDECL 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) 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, MSG_CMSG_CLOEXEC )) > 0)
{
#ifndef HAVE_STRUCT_MSGHDR_MSG_ACCRIGHTS
fd = cmsg.fd;
#endif
if (fd != -1) fcntl( fd, F_SETFD, FD_CLOEXEC ); /* in case MSG_CMSG_CLOEXEC is not supported */
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... */
abort_thread(0);
}
/***********************************************************************/
/* fd cache support */
struct fd_cache_entry
{
int fd;
enum server_fd_type type : 6;
unsigned int access : 2;
unsigned int options : 24;
};
#define FD_CACHE_BLOCK_SIZE (65536 / sizeof(struct fd_cache_entry))
#define FD_CACHE_ENTRIES 128
static struct fd_cache_entry *fd_cache[FD_CACHE_ENTRIES];
static struct fd_cache_entry fd_cache_initial_block[FD_CACHE_BLOCK_SIZE];
static inline unsigned int handle_to_index( HANDLE handle, unsigned int *entry )
{
unsigned int idx = (wine_server_obj_handle(handle) >> 2) - 1;
*entry = idx / FD_CACHE_BLOCK_SIZE;
return idx % FD_CACHE_BLOCK_SIZE;
}
/***********************************************************************
* add_fd_to_cache
*
* Caller must hold fd_cache_section.
*/
static int add_fd_to_cache( HANDLE handle, int fd, enum server_fd_type type,
unsigned int access, unsigned int options )
{
unsigned int entry, idx = handle_to_index( handle, &entry );
int prev_fd;
if (entry >= FD_CACHE_ENTRIES)
{
FIXME( "too many allocated handles, not caching %p\n", handle );
return 0;
}
if (!fd_cache[entry]) /* do we need to allocate a new block of entries? */
{
if (!entry) fd_cache[0] = fd_cache_initial_block;
else
{
void *ptr = wine_anon_mmap( NULL, FD_CACHE_BLOCK_SIZE * sizeof(struct fd_cache_entry),
PROT_READ | PROT_WRITE, 0 );
if (ptr == MAP_FAILED) return 0;
fd_cache[entry] = ptr;
}
}
/* store fd+1 so that 0 can be used as the unset value */
prev_fd = interlocked_xchg( &fd_cache[entry][idx].fd, fd + 1 ) - 1;
fd_cache[entry][idx].type = type;
fd_cache[entry][idx].access = access;
fd_cache[entry][idx].options = options;
if (prev_fd != -1) close( prev_fd );
return 1;
}
/***********************************************************************
* get_cached_fd
*
* Caller must hold fd_cache_section.
*/
static inline int get_cached_fd( HANDLE handle, enum server_fd_type *type,
unsigned int *access, unsigned int *options )
{
unsigned int entry, idx = handle_to_index( handle, &entry );
int fd = -1;
if (entry < FD_CACHE_ENTRIES && fd_cache[entry])
{
fd = fd_cache[entry][idx].fd - 1;
if (type) *type = fd_cache[entry][idx].type;
if (access) *access = fd_cache[entry][idx].access;
if (options) *options = fd_cache[entry][idx].options;
}
return fd;
}
/***********************************************************************
* server_remove_fd_from_cache
*/
int server_remove_fd_from_cache( HANDLE handle )
{
unsigned int entry, idx = handle_to_index( handle, &entry );
int fd = -1;
if (entry < FD_CACHE_ENTRIES && fd_cache[entry])
fd = interlocked_xchg( &fd_cache[entry][idx].fd, 0 ) - 1;
return fd;
}
/***********************************************************************
* server_get_unix_fd
*
* The returned unix_fd should be closed iff needs_close is non-zero.
*/
int server_get_unix_fd( HANDLE handle, unsigned int wanted_access, int *unix_fd,
int *needs_close, enum server_fd_type *type, unsigned int *options )
{
sigset_t sigset;
obj_handle_t fd_handle;
int ret = 0, fd;
unsigned int access = 0;
*unix_fd = -1;
*needs_close = 0;
wanted_access &= FILE_READ_DATA | FILE_WRITE_DATA;
server_enter_uninterrupted_section( &fd_cache_section, &sigset );
fd = get_cached_fd( handle, type, &access, options );
if (fd != -1) goto done;
SERVER_START_REQ( get_handle_fd )
{
req->handle = wine_server_obj_handle( handle );
if (!(ret = wine_server_call( req )))
{
if (type) *type = reply->type;
if (options) *options = reply->options;
access = reply->access;
if ((fd = receive_fd( &fd_handle )) != -1)
{
assert( wine_server_ptr_handle(fd_handle) == handle );
*needs_close = (reply->removable ||
!add_fd_to_cache( handle, fd, reply->type,
reply->access, reply->options ));
}
else ret = STATUS_TOO_MANY_OPENED_FILES;
}
}
SERVER_END_REQ;
done:
server_leave_uninterrupted_section( &fd_cache_section, &sigset );
if (!ret && ((access & wanted_access) != wanted_access))
{
ret = STATUS_ACCESS_DENIED;
if (*needs_close) close( fd );
}
if (!ret) *unix_fd = fd;
return ret;
}
/***********************************************************************
* 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 CDECL wine_server_fd_to_handle( int fd, unsigned int access, unsigned int attributes, HANDLE *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 = wine_server_ptr_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.
* options [O] Address where the file open options will be stored. Optional.
*
* RETURNS
* NTSTATUS code
*/
int CDECL wine_server_handle_to_fd( HANDLE handle, unsigned int access, int *unix_fd,
unsigned int *options )
{
int needs_close, ret = server_get_unix_fd( handle, access, unix_fd, &needs_close, NULL, options );
if (!ret && !needs_close)
{
if ((*unix_fd = dup(*unix_fd)) == -1) ret = FILE_GetNtStatus();
}
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 CDECL wine_server_release_fd( HANDLE handle, int unix_fd )
{
close( unix_fd );
}
/***********************************************************************
* server_pipe
*
* Create a pipe for communicating with the server.
*/
int server_pipe( int fd[2] )
{
int ret;
#ifdef HAVE_PIPE2
static int have_pipe2 = 1;
if (have_pipe2)
{
if (!(ret = pipe2( fd, O_CLOEXEC ))) return ret;
if (errno == ENOSYS || errno == EINVAL) have_pipe2 = 0; /* don't try again */
}
#endif
if (!(ret = pipe( fd )))
{
fcntl( fd[0], F_SETFD, FD_CLOEXEC );
fcntl( fd[1], F_SETFD, FD_CLOEXEC );
}
return ret;
}
/***********************************************************************
* 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;
}
}
/***********************************************************************
* setup_config_dir
*
* Setup the wine configuration dir.
*/
static void setup_config_dir(void)
{
const char *p, *config_dir = wine_get_config_dir();
if (chdir( config_dir ) == -1)
{
if (errno != ENOENT) fatal_perror( "chdir to %s\n", config_dir );
if ((p = strrchr( config_dir, '/' )) && p != config_dir)
{
struct stat st;
char *tmp_dir;
if (!(tmp_dir = malloc( p + 1 - config_dir ))) fatal_error( "out of memory\n" );
memcpy( tmp_dir, config_dir, p - config_dir );
tmp_dir[p - config_dir] = 0;
if (!stat( tmp_dir, &st ) && st.st_uid != getuid())
fatal_error( "'%s' is not owned by you, refusing to create a configuration directory there\n",
tmp_dir );
free( tmp_dir );
}
mkdir( config_dir, 0777 );
if (chdir( config_dir ) == -1) fatal_perror( "chdir to %s\n", config_dir );
MESSAGE( "wine: created the configuration directory '%s'\n", config_dir );
}
if (mkdir( "dosdevices", 0777 ) == -1)
{
if (errno == EEXIST) return;
fatal_perror( "cannot create %s/dosdevices\n", config_dir );
}
/* create the drive symlinks */
mkdir( "drive_c", 0777 );
symlink( "../drive_c", "dosdevices/c:" );
symlink( "/", "dosdevices/z:" );
}
/***********************************************************************
* 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(void)
{
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 */
setup_config_dir();
serverdir = wine_get_server_dir();
/* 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 );
}
#ifdef __APPLE__
#include <mach/mach.h>
#include <mach/mach_error.h>
#include <servers/bootstrap.h>
/* send our task port to the server */
static void send_server_task_port(void)
{
mach_port_t bootstrap_port, wineserver_port;
kern_return_t kret;
struct {
mach_msg_header_t header;
mach_msg_body_t body;
mach_msg_port_descriptor_t task_port;
} msg;
if (task_get_bootstrap_port(mach_task_self(), &bootstrap_port) != KERN_SUCCESS) return;
kret = bootstrap_look_up(bootstrap_port, (char*)wine_get_server_dir(), &wineserver_port);
if (kret != KERN_SUCCESS)
fatal_error( "cannot find the server port: 0x%08x\n", kret );
mach_port_deallocate(mach_task_self(), bootstrap_port);
msg.header.msgh_bits = MACH_MSGH_BITS(MACH_MSG_TYPE_COPY_SEND, 0) | MACH_MSGH_BITS_COMPLEX;
msg.header.msgh_size = sizeof(msg);
msg.header.msgh_remote_port = wineserver_port;
msg.header.msgh_local_port = MACH_PORT_NULL;
msg.body.msgh_descriptor_count = 1;
msg.task_port.name = mach_task_self();
msg.task_port.disposition = MACH_MSG_TYPE_COPY_SEND;
msg.task_port.type = MACH_MSG_PORT_DESCRIPTOR;
kret = mach_msg_send(&msg.header);
if (kret != KERN_SUCCESS)
server_protocol_error( "mach_msg_send failed: 0x%08x\n", kret );
mach_port_deallocate(mach_task_self(), wineserver_port);
}
#endif /* __APPLE__ */
/***********************************************************************
* get_unix_tid
*
* Retrieve the Unix tid to use on the server side for the current thread.
*/
static int get_unix_tid(void)
{
int ret = -1;
#if defined(linux) && defined(__i386__)
__asm__("int $0x80" : "=a" (ret) : "0" (224) /* SYS_gettid */);
#elif defined(linux) && defined(__x86_64__)
__asm__("syscall" : "=a" (ret) : "0" (186) /* SYS_gettid */);
#elif defined(__sun)
ret = pthread_self();
#elif defined(__APPLE__)
ret = mach_thread_self();
mach_port_deallocate(mach_task_self(), ret);
#elif defined(__FreeBSD__)
long lwpid;
thr_self( &lwpid );
ret = lwpid;
#endif
return ret;
}
/***********************************************************************
* server_init_process
*
* Start the server and create the initial socket pair.
*/
void server_init_process(void)
{
obj_handle_t version;
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 );
unsetenv( "WINESERVERSOCKET" );
}
else fd_socket = server_connect();
/* setup the signal mask */
sigemptyset( &server_block_set );
sigaddset( &server_block_set, SIGALRM );
sigaddset( &server_block_set, SIGIO );
sigaddset( &server_block_set, SIGINT );
sigaddset( &server_block_set, SIGHUP );
sigaddset( &server_block_set, SIGUSR1 );
sigaddset( &server_block_set, SIGUSR2 );
sigaddset( &server_block_set, SIGCHLD );
pthread_sigmask( SIG_BLOCK, &server_block_set, NULL );
/* receive the first thread request fd on the main socket */
ntdll_get_thread_data()->request_fd = receive_fd( &version );
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" );
#ifdef __APPLE__
send_server_task_port();
#endif
}
/***********************************************************************
* server_init_process_done
*/
NTSTATUS server_init_process_done(void)
{
PEB *peb = NtCurrentTeb()->Peb;
IMAGE_NT_HEADERS *nt = RtlImageNtHeader( peb->ImageBaseAddress );
NTSTATUS status;
/* Install signal handlers; this cannot be done earlier, since we cannot
* send exceptions to the debugger before the create process event that
* is sent by REQ_INIT_PROCESS_DONE.
* We do need the handlers in place by the time the request is over, so
* we set them up here. If we segfault between here and the server call
* something is very wrong... */
signal_init_process();
/* Signal the parent process to continue */
SERVER_START_REQ( init_process_done )
{
req->module = wine_server_client_ptr( peb->ImageBaseAddress );
#ifdef __i386__
req->ldt_copy = wine_server_client_ptr( &wine_ldt_copy );
#endif
req->entry = wine_server_client_ptr( (char *)peb->ImageBaseAddress + nt->OptionalHeader.AddressOfEntryPoint );
req->gui = (nt->OptionalHeader.Subsystem != IMAGE_SUBSYSTEM_WINDOWS_CUI);
status = wine_server_call( req );
}
SERVER_END_REQ;
return status;
}
/***********************************************************************
* server_init_thread
*
* Send an init thread request. Return 0 if OK.
*/
size_t server_init_thread( void *entry_point )
{
static const int is_win64 = (sizeof(void *) > sizeof(int));
int 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 (server_pipe( reply_pipe ) == -1) server_protocol_perror( "pipe" );
if (server_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] );
SERVER_START_REQ( init_thread )
{
req->unix_pid = getpid();
req->unix_tid = get_unix_tid();
req->teb = wine_server_client_ptr( NtCurrentTeb() );
req->entry = wine_server_client_ptr( entry_point );
req->reply_fd = reply_pipe[1];
req->wait_fd = ntdll_get_thread_data()->wait_fd[1];
req->debug_level = (TRACE_ON(server) != 0);
req->cpu = client_cpu;
ret = wine_server_call( req );
NtCurrentTeb()->ClientId.UniqueProcess = ULongToHandle(reply->pid);
NtCurrentTeb()->ClientId.UniqueThread = ULongToHandle(reply->tid);
info_size = reply->info_size;
server_start_time = reply->server_start;
server_cpus = reply->all_cpus;
}
SERVER_END_REQ;
is_wow64 = !is_win64 && (server_cpus & (1 << CPU_x86_64)) != 0;
ntdll_get_thread_data()->wow64_redir = is_wow64;
switch (ret)
{
case STATUS_SUCCESS:
return info_size;
case STATUS_NOT_REGISTRY_FILE:
fatal_error( "'%s' is a 32-bit installation, it cannot support 64-bit applications.\n",
wine_get_config_dir() );
case STATUS_NOT_SUPPORTED:
if (is_win64)
fatal_error( "wineserver is 32-bit, it cannot support 64-bit applications.\n" );
else
fatal_error( "'%s' is a 64-bit installation, it cannot be used with a 32-bit wineserver.\n",
wine_get_config_dir() );
default:
server_protocol_error( "init_thread failed with status %x\n", ret );
}
}
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