mirror of
git://source.winehq.org/git/wine.git
synced 2024-08-31 11:04:06 +00:00
741 lines
22 KiB
C
741 lines
22 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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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "config.h"
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#include "wine/port.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 <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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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif
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#include <stdarg.h>
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#include "thread.h"
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#include "wine/library.h"
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#include "wine/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 SOCKETNAME "socket" /* name of the socket file */
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#define LOCKNAME "lock" /* name of the lock file */
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#ifndef HAVE_MSGHDR_ACCRIGHTS
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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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#endif /* HAVE_MSGHDR_ACCRIGHTS */
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static void *boot_thread_id;
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static sigset_t block_set; /* signals to block during server calls */
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static int fd_socket; /* socket to exchange file descriptors with the server */
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#ifdef __GNUC__
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static void fatal_error( const char *err, ... ) __attribute__((noreturn, format(printf,1,2)));
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static void fatal_perror( const char *err, ... ) __attribute__((noreturn, format(printf,1,2)));
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static void server_connect_error( const char *serverdir ) __attribute__((noreturn));
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#endif
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/* die on a fatal error; use only during initialization */
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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, ... )
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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, "wine client error:%p: ", NtCurrentTeb()->tid );
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vfprintf( stderr, err, args );
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va_end( args );
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SYSDEPS_AbortThread(1);
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}
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/***********************************************************************
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* server_protocol_perror
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*/
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void server_protocol_perror( const char *err )
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{
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fprintf( stderr, "wine client error:%p: ", NtCurrentTeb()->tid );
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perror( err );
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SYSDEPS_AbortThread(1);
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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( const struct __server_request_info *req )
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{
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int i, ret;
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if (!req->u.req.request_header.request_size)
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{
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if ((ret = write( NtCurrentTeb()->request_fd, &req->u.req,
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sizeof(req->u.req) )) == sizeof(req->u.req)) return;
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}
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else
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{
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struct iovec vec[__SERVER_MAX_DATA+1];
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vec[0].iov_base = (void *)&req->u.req;
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vec[0].iov_len = sizeof(req->u.req);
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for (i = 0; i < req->data_count; i++)
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{
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vec[i+1].iov_base = (void *)req->data[i].ptr;
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vec[i+1].iov_len = req->data[i].size;
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}
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if ((ret = writev( NtCurrentTeb()->request_fd, vec, i+1 )) ==
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req->u.req.request_header.request_size + sizeof(req->u.req)) return;
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}
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if (ret >= 0) server_protocol_error( "partial write %d\n", ret );
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if (errno == EPIPE) SYSDEPS_AbortThread(0);
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server_protocol_perror( "sendmsg" );
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}
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/***********************************************************************
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* read_reply_data
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*
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* Read data from the reply buffer; helper for wait_reply.
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*/
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static void read_reply_data( void *buffer, size_t size )
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{
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int ret;
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for (;;)
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{
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if ((ret = read( NtCurrentTeb()->reply_fd, buffer, size )) > 0)
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{
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if (!(size -= ret)) return;
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buffer = (char *)buffer + ret;
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continue;
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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_protocol_perror("read");
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}
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/* the server closed the connection; time to die... */
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SYSDEPS_AbortThread(0);
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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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inline static void wait_reply( struct __server_request_info *req )
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{
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read_reply_data( &req->u.reply, sizeof(req->u.reply) );
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if (req->u.reply.reply_header.reply_size)
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read_reply_data( req->reply_data, req->u.reply.reply_header.reply_size );
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}
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/***********************************************************************
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* wine_server_call (NTDLL.@)
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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( void *req_ptr )
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{
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struct __server_request_info * const req = req_ptr;
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sigset_t old_set;
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memset( (char *)&req->u.req + req->size, 0, sizeof(req->u.req) - req->size );
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sigprocmask( SIG_BLOCK, &block_set, &old_set );
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send_request( req );
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wait_reply( req );
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sigprocmask( SIG_SETMASK, &old_set, NULL );
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return req->u.reply.reply_header.error;
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}
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/***********************************************************************
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* wine_server_send_fd
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*
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* Send a file descriptor to the server.
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*/
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void wine_server_send_fd( 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 send_fd data;
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struct msghdr msghdr;
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struct iovec vec;
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int ret;
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vec.iov_base = (void *)&data;
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vec.iov_len = sizeof(data);
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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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data.tid = (void *)GetCurrentThreadId();
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data.fd = fd;
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for (;;)
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{
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if ((ret = sendmsg( fd_socket, &msghdr, 0 )) == sizeof(data)) return;
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if (ret >= 0) server_protocol_error( "partial write %d\n", ret );
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if (errno == EINTR) continue;
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if (errno == EPIPE) SYSDEPS_AbortThread(0);
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server_protocol_perror( "sendmsg" );
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}
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}
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/***********************************************************************
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* receive_fd
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*
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* Receive a file descriptor passed from the server.
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*/
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static int receive_fd( obj_handle_t *handle )
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{
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struct iovec vec;
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int ret, fd;
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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 *)handle;
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vec.iov_len = sizeof(*handle);
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for (;;)
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{
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if ((ret = recvmsg( fd_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 (fd == -1) server_protocol_error( "no fd received for handle %d\n", *handle );
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fcntl( fd, F_SETFD, 1 ); /* set close on exec flag */
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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_protocol_perror("recvmsg");
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}
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/* the server closed the connection; time to die... */
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SYSDEPS_AbortThread(0);
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}
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/***********************************************************************
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* store_cached_fd
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*
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* Store the cached fd value for a given handle back into the server.
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* Returns the new fd, which can be different if there was already an
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* fd in the cache for that handle.
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*/
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inline static int store_cached_fd( int fd, obj_handle_t handle )
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{
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SERVER_START_REQ( set_handle_info )
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{
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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 (!wine_server_call( req ))
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{
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if (reply->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 = reply->cur_fd;
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}
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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_fd_to_handle (NTDLL.@)
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*
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* Allocate a file handle for a Unix fd.
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*/
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int wine_server_fd_to_handle( int fd, unsigned int access, int inherit, obj_handle_t *handle )
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{
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int ret;
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*handle = 0;
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wine_server_send_fd( fd );
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SERVER_START_REQ( alloc_file_handle )
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{
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req->access = access;
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req->inherit = inherit;
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req->fd = fd;
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if (!(ret = wine_server_call( req ))) *handle = reply->handle;
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}
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SERVER_END_REQ;
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return ret;
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}
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/***********************************************************************
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* wine_server_handle_to_fd (NTDLL.@)
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*
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* Retrieve the Unix fd corresponding to a file handle.
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*/
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int wine_server_handle_to_fd( obj_handle_t handle, unsigned int access, int *unix_fd,
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enum fd_type *type, int *flags )
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{
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obj_handle_t fd_handle;
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int ret, fd = -1;
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*unix_fd = -1;
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for (;;)
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{
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SERVER_START_REQ( get_handle_fd )
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{
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req->handle = handle;
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req->access = access;
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if (!(ret = wine_server_call( req ))) fd = reply->fd;
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if (type) *type = reply->type;
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if (flags) *flags = reply->flags;
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}
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SERVER_END_REQ;
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if (ret) return ret;
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if (fd != -1) break;
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/* it wasn't in the cache, get it from the server */
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fd = receive_fd( &fd_handle );
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/* and store it back into the cache */
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fd = store_cached_fd( fd, fd_handle );
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if (fd_handle == handle) break;
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/* if we received a different handle this means there was
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* a race with another thread; we restart everything from
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* scratch in this case.
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*/
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}
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if ((fd != -1) && ((fd = dup(fd)) == -1)) return STATUS_TOO_MANY_OPENED_FILES;
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*unix_fd = fd;
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return STATUS_SUCCESS;
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}
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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" );
|
|
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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if (p[0] != '/' && oldcwd[0] == '/') /* make it an absolute path */
|
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{
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if (!(path = malloc( strlen(oldcwd) + strlen(p) + 1 )))
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fatal_error( "out of memory\n" );
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sprintf( path, "%s/%s", oldcwd, p );
|
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p = path;
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}
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execl( p, p, 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 */
|
|
if (full_argv0)
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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, path, NULL );
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}
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free(path);
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}
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/* finally try the path */
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execlp( "wineserver", "wineserver", NULL );
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fatal_error( "could not exec wineserver\n" );
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}
|
|
waitpid( pid, &status, 0 );
|
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status = WIFEXITED(status) ? WEXITSTATUS(status) : 1;
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|
if (status == 2) return; /* server lock held by someone else, will retry later */
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|
if (status) exit(status); /* server failed */
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|
started = 1;
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|
}
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|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* server_connect_error
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|
*
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|
* Try to display a meaningful explanation of why we couldn't connect
|
|
* to the server.
|
|
*/
|
|
static void server_connect_error( const char *serverdir )
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|
{
|
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int fd;
|
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struct flock fl;
|
|
|
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if ((fd = open( LOCKNAME, O_WRONLY )) == -1)
|
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fatal_error( "for some mysterious reason, the wine server never started.\n" );
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|
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fl.l_type = F_WRLCK;
|
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fl.l_whence = SEEK_SET;
|
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fl.l_start = 0;
|
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fl.l_len = 1;
|
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if (fcntl( fd, F_GETLK, &fl ) != -1)
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|
{
|
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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",
|
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(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 *oldcwd, const char *serverdir )
|
|
{
|
|
struct sockaddr_un addr;
|
|
struct stat st;
|
|
int s, slen, retry;
|
|
|
|
/* 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( oldcwd );
|
|
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( oldcwd );
|
|
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_SOCKADDR_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)
|
|
{
|
|
fcntl( s, F_SETFD, 1 ); /* set close on exec flag */
|
|
return s;
|
|
}
|
|
close( s );
|
|
}
|
|
server_connect_error( serverdir );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* CLIENT_InitServer
|
|
*
|
|
* Start the server and create the initial socket pair.
|
|
*/
|
|
void CLIENT_InitServer(void)
|
|
{
|
|
int size;
|
|
char *oldcwd;
|
|
obj_handle_t dummy_handle;
|
|
|
|
/* 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;
|
|
}
|
|
}
|
|
|
|
/* connect to the server */
|
|
fd_socket = server_connect( oldcwd, wine_get_server_dir() );
|
|
|
|
/* switch back to the starting directory */
|
|
if (oldcwd)
|
|
{
|
|
chdir( oldcwd );
|
|
free( oldcwd );
|
|
}
|
|
|
|
/* setup the signal mask */
|
|
sigemptyset( &block_set );
|
|
sigaddset( &block_set, SIGALRM );
|
|
sigaddset( &block_set, SIGIO );
|
|
sigaddset( &block_set, SIGINT );
|
|
sigaddset( &block_set, SIGHUP );
|
|
|
|
/* receive the first thread request fd on the main socket */
|
|
NtCurrentTeb()->request_fd = receive_fd( &dummy_handle );
|
|
|
|
CLIENT_InitThread();
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* CLIENT_InitThread
|
|
*
|
|
* Send an init thread request. Return 0 if OK.
|
|
*/
|
|
void CLIENT_InitThread(void)
|
|
{
|
|
TEB *teb = NtCurrentTeb();
|
|
int version, ret;
|
|
int reply_pipe[2];
|
|
|
|
/* ignore SIGPIPE so that we get a EPIPE error instead */
|
|
signal( SIGPIPE, SIG_IGN );
|
|
/* automatic child reaping to avoid zombies */
|
|
signal( SIGCHLD, SIG_IGN );
|
|
|
|
/* create the server->client communication pipes */
|
|
if (pipe( reply_pipe ) == -1) server_protocol_perror( "pipe" );
|
|
if (pipe( teb->wait_fd ) == -1) server_protocol_perror( "pipe" );
|
|
wine_server_send_fd( reply_pipe[1] );
|
|
wine_server_send_fd( teb->wait_fd[1] );
|
|
teb->reply_fd = reply_pipe[0];
|
|
close( reply_pipe[1] );
|
|
|
|
/* set close on exec flag */
|
|
fcntl( teb->reply_fd, F_SETFD, 1 );
|
|
fcntl( teb->wait_fd[0], F_SETFD, 1 );
|
|
fcntl( teb->wait_fd[1], F_SETFD, 1 );
|
|
|
|
SERVER_START_REQ( init_thread )
|
|
{
|
|
req->unix_pid = getpid();
|
|
req->teb = teb;
|
|
req->entry = teb->entry_point;
|
|
req->reply_fd = reply_pipe[1];
|
|
req->wait_fd = teb->wait_fd[1];
|
|
ret = wine_server_call( req );
|
|
teb->pid = reply->pid;
|
|
teb->tid = reply->tid;
|
|
version = reply->version;
|
|
if (reply->boot) boot_thread_id = teb->tid;
|
|
else if (boot_thread_id == teb->tid) boot_thread_id = 0;
|
|
}
|
|
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" );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* CLIENT_BootDone
|
|
*
|
|
* Signal that we have finished booting, and set debug level.
|
|
*/
|
|
void CLIENT_BootDone( int debug_level )
|
|
{
|
|
SERVER_START_REQ( boot_done )
|
|
{
|
|
req->debug_level = debug_level;
|
|
wine_server_call( req );
|
|
}
|
|
SERVER_END_REQ;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* CLIENT_IsBootThread
|
|
*
|
|
* Return TRUE if current thread is the boot thread.
|
|
*/
|
|
int CLIENT_IsBootThread(void)
|
|
{
|
|
return (GetCurrentThreadId() == (DWORD)boot_thread_id);
|
|
}
|