677 lines
20 KiB
C
677 lines
20 KiB
C
/*
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* Client part of the client/server communication
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*
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* Copyright (C) 1998 Alexandre Julliard
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*/
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#include "config.h"
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#include <assert.h>
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#include <ctype.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <pwd.h>
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#include <signal.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/types.h>
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#ifdef HAVE_SYS_SOCKET_H
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# include <sys/socket.h>
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#endif
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#ifdef HAVE_SYS_WAIT_H
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#include <sys/wait.h>
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#endif
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#include <sys/un.h>
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#ifdef HAVE_SYS_MMAN_H
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#include <sys/mman.h>
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#endif
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#include <sys/stat.h>
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#include <sys/uio.h>
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#include <unistd.h>
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#include <stdarg.h>
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#include "wine/port.h"
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#include "thread.h"
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#include "server.h"
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#include "winerror.h"
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#include "options.h"
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/* Some versions of glibc don't define this */
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#ifndef SCM_RIGHTS
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#define SCM_RIGHTS 1
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#endif
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#define CONFDIR "/.wine" /* directory for Wine config relative to $HOME */
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#define SERVERDIR "/wineserver-" /* server socket directory (hostname appended) */
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#define SOCKETNAME "socket" /* name of the socket file */
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#undef server_alloc_req
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/* data structure used to pass an fd with sendmsg/recvmsg */
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struct cmsg_fd
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{
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int len; /* sizeof structure */
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int level; /* SOL_SOCKET */
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int type; /* SCM_RIGHTS */
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int fd; /* fd to pass */
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};
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static void *boot_thread_id;
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/* die on a fatal error; use only during initialization */
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static void fatal_error( const char *err, ... ) WINE_NORETURN;
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static void fatal_error( const char *err, ... )
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{
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va_list args;
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va_start( args, err );
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fprintf( stderr, "wine: " );
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vfprintf( stderr, err, args );
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va_end( args );
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exit(1);
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}
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/* die on a fatal error; use only during initialization */
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static void fatal_perror( const char *err, ... ) WINE_NORETURN;
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static void fatal_perror( const char *err, ... )
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{
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va_list args;
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va_start( args, err );
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fprintf( stderr, "wine: " );
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vfprintf( stderr, err, args );
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perror( " " );
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va_end( args );
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exit(1);
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}
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/***********************************************************************
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* server_protocol_error
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*/
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void server_protocol_error( const char *err, ... )
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{
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va_list args;
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va_start( args, err );
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fprintf( stderr, "Client protocol error:%p: ", NtCurrentTeb()->tid );
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vfprintf( stderr, err, args );
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va_end( args );
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SYSDEPS_ExitThread(1);
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}
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/***********************************************************************
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* server_perror
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*/
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static void server_perror( const char *err )
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{
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fprintf( stderr, "Client protocol error:%p: ", NtCurrentTeb()->tid );
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perror( err );
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SYSDEPS_ExitThread(1);
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}
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/***********************************************************************
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* __wine_server_exception_handler
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*/
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DWORD __wine_server_exception_handler( PEXCEPTION_RECORD record, EXCEPTION_FRAME *frame,
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CONTEXT *context, EXCEPTION_FRAME **pdispatcher )
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{
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struct __server_exception_frame *server_frame = (struct __server_exception_frame *)frame;
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if ((record->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND)))
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*NtCurrentTeb()->buffer_info = server_frame->info;
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return ExceptionContinueSearch;
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}
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/***********************************************************************
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* wine_server_alloc_req
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*/
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void *wine_server_alloc_req( size_t fixed_size, size_t var_size )
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{
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unsigned int pos = NtCurrentTeb()->buffer_info->cur_pos;
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union generic_request *req = (union generic_request *)((char *)NtCurrentTeb()->buffer + pos);
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size_t size = sizeof(*req) + var_size;
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assert( fixed_size <= sizeof(*req) );
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assert( var_size <= REQUEST_MAX_VAR_SIZE );
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if ((char *)req + size > (char *)NtCurrentTeb()->buffer_info)
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server_protocol_error( "buffer overflow %d bytes\n",
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(char *)req + size - (char *)NtCurrentTeb()->buffer_info );
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NtCurrentTeb()->buffer_info->cur_pos = pos + size;
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req->header.fixed_size = fixed_size;
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req->header.var_size = var_size;
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return req;
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}
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/***********************************************************************
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* send_request
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*
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* Send a request to the server.
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*/
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static void send_request( enum request req, struct request_header *header )
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{
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header->req = req;
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NtCurrentTeb()->buffer_info->cur_req = (char *)header - (char *)NtCurrentTeb()->buffer;
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/* write a single byte; the value is ignored anyway */
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if (write( NtCurrentTeb()->request_fd, header, 1 ) == -1)
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{
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if (errno == EPIPE) SYSDEPS_ExitThread(0);
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server_perror( "sendmsg" );
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}
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}
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/***********************************************************************
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* send_request_fd
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*
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* Send a request to the server, passing a file descriptor.
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*/
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static void send_request_fd( enum request req, struct request_header *header, int fd )
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{
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#ifndef HAVE_MSGHDR_ACCRIGHTS
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struct cmsg_fd cmsg;
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#endif
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struct msghdr msghdr;
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struct iovec vec;
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/* write a single byte; the value is ignored anyway */
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vec.iov_base = (void *)header;
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vec.iov_len = 1;
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msghdr.msg_name = NULL;
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msghdr.msg_namelen = 0;
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msghdr.msg_iov = &vec;
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msghdr.msg_iovlen = 1;
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#ifdef HAVE_MSGHDR_ACCRIGHTS
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msghdr.msg_accrights = (void *)&fd;
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msghdr.msg_accrightslen = sizeof(fd);
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#else /* HAVE_MSGHDR_ACCRIGHTS */
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cmsg.len = sizeof(cmsg);
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cmsg.level = SOL_SOCKET;
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cmsg.type = SCM_RIGHTS;
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cmsg.fd = fd;
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msghdr.msg_control = &cmsg;
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msghdr.msg_controllen = sizeof(cmsg);
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msghdr.msg_flags = 0;
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#endif /* HAVE_MSGHDR_ACCRIGHTS */
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header->req = req;
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if (sendmsg( NtCurrentTeb()->socket, &msghdr, 0 ) == -1)
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{
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if (errno == EPIPE) SYSDEPS_ExitThread(0);
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server_perror( "sendmsg" );
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}
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}
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/***********************************************************************
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* wait_reply
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*
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* Wait for a reply from the server.
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*/
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static void wait_reply(void)
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{
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int ret;
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char dummy[1];
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for (;;)
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{
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if ((ret = read( NtCurrentTeb()->reply_fd, dummy, 1 )) > 0) return;
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if (!ret) break;
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if (errno == EINTR) continue;
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if (errno == EPIPE) break;
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server_perror("read");
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}
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/* the server closed the connection; time to die... */
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SYSDEPS_ExitThread(0);
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}
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/***********************************************************************
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* wine_server_call
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*
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* Perform a server call.
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*/
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unsigned int wine_server_call( enum request req )
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{
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void *req_ptr = get_req_buffer();
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send_request( req, req_ptr );
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wait_reply();
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return ((struct request_header *)req_ptr)->error;
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}
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/***********************************************************************
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* server_call_fd
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*
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* Perform a server call, passing a file descriptor.
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*/
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unsigned int server_call_fd( enum request req, int fd_out )
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{
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unsigned int res;
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void *req_ptr = get_req_buffer();
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send_request_fd( req, req_ptr, fd_out );
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wait_reply();
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if ((res = ((struct request_header *)req_ptr)->error))
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SetLastError( RtlNtStatusToDosError(res) );
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return res; /* error code */
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}
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/***********************************************************************
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* set_handle_fd
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*
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* Store the fd for a given handle in the server
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*/
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static int set_handle_fd( int handle, int fd )
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{
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SERVER_START_REQ
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{
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struct set_handle_info_request *req = wine_server_alloc_req( sizeof(*req), 0 );
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req->handle = handle;
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req->flags = 0;
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req->mask = 0;
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req->fd = fd;
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if (!server_call( REQ_SET_HANDLE_INFO ))
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{
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if (req->cur_fd != fd)
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{
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/* someone was here before us */
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close( fd );
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fd = req->cur_fd;
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}
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else fcntl( fd, F_SETFD, 1 ); /* set close on exec flag */
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}
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else
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{
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close( fd );
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fd = -1;
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}
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}
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SERVER_END_REQ;
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return fd;
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}
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/***********************************************************************
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* wine_server_recv_fd
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*
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* Receive a file descriptor passed from the server.
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* The file descriptor must be closed after use.
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*/
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int wine_server_recv_fd( int handle, int cache )
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{
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struct iovec vec;
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int ret, fd, server_handle;
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#ifdef HAVE_MSGHDR_ACCRIGHTS
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struct msghdr msghdr;
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fd = -1;
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msghdr.msg_accrights = (void *)&fd;
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msghdr.msg_accrightslen = sizeof(fd);
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#else /* HAVE_MSGHDR_ACCRIGHTS */
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struct msghdr msghdr;
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struct cmsg_fd cmsg;
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cmsg.len = sizeof(cmsg);
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cmsg.level = SOL_SOCKET;
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cmsg.type = SCM_RIGHTS;
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cmsg.fd = -1;
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msghdr.msg_control = &cmsg;
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msghdr.msg_controllen = sizeof(cmsg);
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msghdr.msg_flags = 0;
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#endif /* HAVE_MSGHDR_ACCRIGHTS */
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msghdr.msg_name = NULL;
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msghdr.msg_namelen = 0;
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msghdr.msg_iov = &vec;
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msghdr.msg_iovlen = 1;
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vec.iov_base = (void *)&server_handle;
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vec.iov_len = sizeof(server_handle);
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for (;;)
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{
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if ((ret = recvmsg( NtCurrentTeb()->socket, &msghdr, 0 )) > 0)
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{
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#ifndef HAVE_MSGHDR_ACCRIGHTS
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fd = cmsg.fd;
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#endif
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if (handle != server_handle)
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server_protocol_error( "recv_fd: got handle %d, expected %d\n",
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server_handle, handle );
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if (cache)
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{
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fd = set_handle_fd( handle, fd );
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if (fd != -1) fd = dup(fd);
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}
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return fd;
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}
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if (!ret) break;
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if (errno == EINTR) continue;
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if (errno == EPIPE) break;
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server_perror("recvmsg");
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}
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/* the server closed the connection; time to die... */
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SYSDEPS_ExitThread(0);
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}
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/***********************************************************************
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* get_config_dir
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*
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* Return the configuration directory ($WINEPREFIX or $HOME/.wine)
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*/
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const char *get_config_dir(void)
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{
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static char *confdir;
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if (!confdir)
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{
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const char *prefix = getenv( "WINEPREFIX" );
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if (prefix)
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{
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int len = strlen(prefix);
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if (!(confdir = strdup( prefix ))) fatal_error( "out of memory\n" );
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if (len > 1 && confdir[len-1] == '/') confdir[len-1] = 0;
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}
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else
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{
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const char *home = getenv( "HOME" );
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if (!home)
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{
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struct passwd *pwd = getpwuid( getuid() );
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if (!pwd) fatal_error( "could not find your home directory\n" );
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home = pwd->pw_dir;
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}
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if (!(confdir = malloc( strlen(home) + strlen(CONFDIR) + 1 )))
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fatal_error( "out of memory\n" );
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strcpy( confdir, home );
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strcat( confdir, CONFDIR );
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}
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mkdir( confdir, 0755 ); /* just in case */
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}
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return confdir;
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}
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/***********************************************************************
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* start_server
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*
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* Start a new wine server.
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*/
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static void start_server( const char *oldcwd )
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{
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static int started; /* we only try once */
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char *path, *p;
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if (!started)
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{
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int status;
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int pid = fork();
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if (pid == -1) fatal_perror( "fork" );
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if (!pid)
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{
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/* if server is explicitly specified, use this */
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if ((p = getenv("WINESERVER")))
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{
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execl( p, "wineserver", NULL );
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fatal_perror( "could not exec the server '%s'\n"
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" specified in the WINESERVER environment variable", p );
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}
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/* first try the installation dir */
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execl( BINDIR "/wineserver", "wineserver", NULL );
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/* now try the dir we were launched from */
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if (full_argv0)
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{
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if (!(path = malloc( strlen(full_argv0) + 20 )))
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fatal_error( "out of memory\n" );
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if ((p = strrchr( strcpy( path, full_argv0 ), '/' )))
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{
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strcpy( p, "/wineserver" );
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execl( path, "wineserver", NULL );
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strcpy( p, "/server/wineserver" );
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execl( path, "wineserver", NULL );
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}
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free(path);
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}
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/* now try the path */
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execlp( "wineserver", "wineserver", NULL );
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/* and finally the current dir */
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if (!(path = malloc( strlen(oldcwd) + 20 )))
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fatal_error( "out of memory\n" );
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p = strcpy( path, oldcwd ) + strlen( oldcwd );
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strcpy( p, "/wineserver" );
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execl( path, "wineserver", NULL );
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strcpy( p, "/server/wineserver" );
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execl( path, "wineserver", NULL );
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free(path);
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fatal_error( "could not exec wineserver\n" );
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}
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started = 1;
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waitpid( pid, &status, 0 );
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status = WIFEXITED(status) ? WEXITSTATUS(status) : 1;
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if (status) exit(status); /* server failed */
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}
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}
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/***********************************************************************
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* server_connect
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*
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* Attempt to connect to an existing server socket.
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* We need to be in the server directory already.
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*/
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static int server_connect( const char *oldcwd, const char *serverdir )
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{
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struct sockaddr_un addr;
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struct stat st;
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int s, slen, retry;
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/* chdir to the server directory */
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if (chdir( serverdir ) == -1)
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{
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if (errno != ENOENT) fatal_perror( "chdir to %s", serverdir );
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start_server( "." );
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if (chdir( serverdir ) == -1) fatal_perror( "chdir to %s", serverdir );
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}
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/* make sure we are at the right place */
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if (stat( ".", &st ) == -1) fatal_perror( "stat %s", serverdir );
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if (st.st_uid != getuid()) fatal_error( "'%s' is not owned by you\n", serverdir );
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if (st.st_mode & 077) fatal_error( "'%s' must not be accessible by other users\n", serverdir );
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for (retry = 0; retry < 3; retry++)
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{
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/* if not the first try, wait a bit to leave the server time to exit */
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if (retry) usleep( 100000 * retry * retry );
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/* check for an existing socket */
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if (lstat( SOCKETNAME, &st ) == -1)
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{
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if (errno != ENOENT) fatal_perror( "lstat %s/%s", serverdir, SOCKETNAME );
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start_server( oldcwd );
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if (lstat( SOCKETNAME, &st ) == -1) fatal_perror( "lstat %s/%s", serverdir, SOCKETNAME );
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}
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/* make sure the socket is sane (ISFIFO needed for Solaris) */
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if (!S_ISSOCK(st.st_mode) && !S_ISFIFO(st.st_mode))
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fatal_error( "'%s/%s' is not a socket\n", serverdir, SOCKETNAME );
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if (st.st_uid != getuid())
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fatal_error( "'%s/%s' is not owned by you\n", serverdir, SOCKETNAME );
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/* try to connect to it */
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addr.sun_family = AF_UNIX;
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strcpy( addr.sun_path, SOCKETNAME );
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slen = sizeof(addr) - sizeof(addr.sun_path) + strlen(addr.sun_path) + 1;
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#ifdef HAVE_SOCKADDR_SUN_LEN
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addr.sun_len = slen;
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#endif
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if ((s = socket( AF_UNIX, SOCK_STREAM, 0 )) == -1) fatal_perror( "socket" );
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if (connect( s, (struct sockaddr *)&addr, slen ) != -1)
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{
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fcntl( s, F_SETFD, 1 ); /* set close on exec flag */
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return s;
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}
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close( s );
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}
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fatal_error( "file '%s/%s' exists,\n"
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" but I cannot connect to it; maybe the server has crashed?\n"
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" If this is the case, you should remove this socket file and try again.\n",
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serverdir, SOCKETNAME );
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}
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/***********************************************************************
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* CLIENT_InitServer
|
|
*
|
|
* Start the server and create the initial socket pair.
|
|
*/
|
|
int CLIENT_InitServer(void)
|
|
{
|
|
int fd, size;
|
|
char hostname[64];
|
|
char *oldcwd, *serverdir;
|
|
const char *configdir;
|
|
|
|
/* retrieve the current directory */
|
|
for (size = 512; ; size *= 2)
|
|
{
|
|
if (!(oldcwd = malloc( size ))) break;
|
|
if (getcwd( oldcwd, size )) break;
|
|
free( oldcwd );
|
|
if (errno == ERANGE) continue;
|
|
oldcwd = NULL;
|
|
break;
|
|
}
|
|
|
|
/* if argv[0] is a relative path, make it absolute */
|
|
full_argv0 = argv0;
|
|
if (oldcwd && argv0[0] != '/' && strchr( argv0, '/' ))
|
|
{
|
|
char *new_argv0 = malloc( strlen(oldcwd) + strlen(argv0) + 2 );
|
|
if (new_argv0)
|
|
{
|
|
strcpy( new_argv0, oldcwd );
|
|
strcat( new_argv0, "/" );
|
|
strcat( new_argv0, argv0 );
|
|
full_argv0 = new_argv0;
|
|
}
|
|
}
|
|
|
|
/* get the server directory name */
|
|
if (gethostname( hostname, sizeof(hostname) ) == -1) fatal_perror( "gethostname" );
|
|
configdir = get_config_dir();
|
|
serverdir = malloc( strlen(configdir) + strlen(SERVERDIR) + strlen(hostname) + 1 );
|
|
if (!serverdir) fatal_error( "out of memory\n" );
|
|
strcpy( serverdir, configdir );
|
|
strcat( serverdir, SERVERDIR );
|
|
strcat( serverdir, hostname );
|
|
|
|
/* connect to the server */
|
|
fd = server_connect( oldcwd, serverdir );
|
|
|
|
/* switch back to the starting directory */
|
|
if (oldcwd)
|
|
{
|
|
chdir( oldcwd );
|
|
free( oldcwd );
|
|
}
|
|
return fd;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* CLIENT_InitThread
|
|
*
|
|
* Send an init thread request. Return 0 if OK.
|
|
*/
|
|
int CLIENT_InitThread(void)
|
|
{
|
|
struct get_thread_buffer_request *req;
|
|
TEB *teb = NtCurrentTeb();
|
|
int fd, ret, size;
|
|
|
|
/* ignore SIGPIPE so that we get a EPIPE error instead */
|
|
signal( SIGPIPE, SIG_IGN );
|
|
|
|
teb->request_fd = wine_server_recv_fd( -1, 0 );
|
|
if (teb->request_fd == -1) server_protocol_error( "no request fd passed on first request\n" );
|
|
fcntl( teb->request_fd, F_SETFD, 1 ); /* set close on exec flag */
|
|
|
|
teb->reply_fd = wine_server_recv_fd( -1, 0 );
|
|
if (teb->reply_fd == -1) server_protocol_error( "no reply fd passed on first request\n" );
|
|
fcntl( teb->reply_fd, F_SETFD, 1 ); /* set close on exec flag */
|
|
|
|
fd = wine_server_recv_fd( -1, 0 );
|
|
if (fd == -1) server_protocol_error( "no fd received for thread buffer\n" );
|
|
|
|
if ((size = lseek( fd, 0, SEEK_END )) == -1) server_perror( "lseek" );
|
|
teb->buffer = mmap( 0, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0 );
|
|
close( fd );
|
|
if (teb->buffer == (void*)-1) server_perror( "mmap" );
|
|
teb->buffer_info = (struct server_buffer_info *)((char *)teb->buffer + size) - 1;
|
|
|
|
wait_reply();
|
|
|
|
req = (struct get_thread_buffer_request *)teb->buffer;
|
|
teb->pid = req->pid;
|
|
teb->tid = req->tid;
|
|
if (req->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",
|
|
req->version, SERVER_PROTOCOL_VERSION,
|
|
(req->version > SERVER_PROTOCOL_VERSION) ? "wine" : "wineserver" );
|
|
if (req->boot) boot_thread_id = teb->tid;
|
|
else if (boot_thread_id == teb->tid) boot_thread_id = 0;
|
|
|
|
SERVER_START_REQ
|
|
{
|
|
struct init_thread_request *req = wine_server_alloc_req( sizeof(*req), 0 );
|
|
req->unix_pid = getpid();
|
|
req->teb = teb;
|
|
req->entry = teb->entry_point;
|
|
ret = wine_server_call( REQ_INIT_THREAD );
|
|
}
|
|
SERVER_END_REQ;
|
|
return ret;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* CLIENT_BootDone
|
|
*
|
|
* Signal that we have finished booting, and set debug level.
|
|
*/
|
|
int CLIENT_BootDone( int debug_level )
|
|
{
|
|
int ret;
|
|
SERVER_START_REQ
|
|
{
|
|
struct boot_done_request *req = wine_server_alloc_req( sizeof(*req), 0 );
|
|
req->debug_level = debug_level;
|
|
ret = server_call( REQ_BOOT_DONE );
|
|
}
|
|
SERVER_END_REQ;
|
|
return ret;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* CLIENT_IsBootThread
|
|
*
|
|
* Return TRUE if current thread is the boot thread.
|
|
*/
|
|
int CLIENT_IsBootThread(void)
|
|
{
|
|
return (GetCurrentThreadId() == (DWORD)boot_thread_id);
|
|
}
|