352 lines
10 KiB
C
352 lines
10 KiB
C
/*
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* Configuration parameters shared between Wine server and clients
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*
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* Copyright 2002 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 <stdio.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <sys/stat.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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#ifdef HAVE_PWD_H
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#include <pwd.h>
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#endif
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#include "wine/library.h"
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static const char server_config_dir[] = "/.wine"; /* config dir relative to $HOME */
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static const char server_root_prefix[] = "/tmp/.wine-"; /* prefix for server root dir */
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static const char server_dir_prefix[] = "/server-"; /* prefix for server dir */
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static char *config_dir;
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static char *server_dir;
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static char *user_name;
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static char *argv0_path;
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static char *argv0_name;
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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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#endif
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/* die on a fatal error */
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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 */
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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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/* malloc wrapper */
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static void *xmalloc( size_t size )
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{
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void *res;
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if (!size) size = 1;
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if (!(res = malloc( size ))) fatal_error( "virtual memory exhausted\n");
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return res;
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}
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/* strdup wrapper */
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static char *xstrdup( const char *str )
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{
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size_t len = strlen(str) + 1;
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char *res = xmalloc( len );
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memcpy( res, str, len );
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return res;
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}
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/* remove all trailing slashes from a path name */
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inline static void remove_trailing_slashes( char *path )
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{
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int len = strlen( path );
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while (len > 1 && path[len-1] == '/') path[--len] = 0;
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}
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/* initialize the server directory value */
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static void init_server_dir( dev_t dev, ino_t ino )
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{
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char *p;
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#ifdef HAVE_GETUID
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const unsigned int uid = getuid();
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#else
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const unsigned int uid = 0;
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#endif
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server_dir = xmalloc( sizeof(server_root_prefix) + 32 + sizeof(server_dir_prefix) +
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2*sizeof(dev) + 2*sizeof(ino) );
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sprintf( server_dir, "%s%u%s", server_root_prefix, uid, server_dir_prefix );
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p = server_dir + strlen(server_dir);
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if (sizeof(dev) > sizeof(unsigned long) && dev > ~0UL)
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p += sprintf( p, "%lx%08lx-", (unsigned long)(dev >> 32), (unsigned long)dev );
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else
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p += sprintf( p, "%lx-", (unsigned long)dev );
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if (sizeof(ino) > sizeof(unsigned long) && ino > ~0UL)
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sprintf( p, "%lx%08lx", (unsigned long)(ino >> 32), (unsigned long)ino );
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else
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sprintf( p, "%lx", (unsigned long)ino );
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}
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/* initialize all the paths values */
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static void init_paths(void)
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{
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struct stat st;
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const char *home = getenv( "HOME" );
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const char *user = NULL;
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const char *prefix = getenv( "WINEPREFIX" );
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#ifdef HAVE_GETPWUID
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char uid_str[32];
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struct passwd *pwd = getpwuid( getuid() );
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if (pwd)
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{
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user = pwd->pw_name;
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if (!home) home = pwd->pw_dir;
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}
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if (!user)
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{
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sprintf( uid_str, "%u", getuid() );
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user = uid_str;
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}
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#else /* HAVE_GETPWUID */
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if (!(user = getenv( "USER" )))
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fatal_error( "cannot determine your user name, set the USER environment variable\n" );
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#endif /* HAVE_GETPWUID */
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user_name = xstrdup( user );
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/* build config_dir */
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if (prefix)
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{
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if (!(config_dir = strdup( prefix ))) fatal_error( "virtual memory exhausted\n");
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remove_trailing_slashes( config_dir );
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if (config_dir[0] != '/')
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fatal_error( "invalid directory %s in WINEPREFIX: not an absolute path\n", prefix );
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if (stat( config_dir, &st ) == -1)
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{
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if (errno != ENOENT)
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fatal_perror( "cannot open %s as specified in WINEPREFIX", config_dir );
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fatal_error( "the '%s' directory specified in WINEPREFIX doesn't exist.\n"
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"You may want to create it by running 'wineprefixcreate'.\n", config_dir );
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}
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}
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else
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{
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if (!home) fatal_error( "could not determine your home directory\n" );
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if (home[0] != '/') fatal_error( "your home directory %s is not an absolute path\n", home );
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config_dir = xmalloc( strlen(home) + sizeof(server_config_dir) );
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strcpy( config_dir, home );
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remove_trailing_slashes( config_dir );
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strcat( config_dir, server_config_dir );
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if (stat( config_dir, &st ) == -1)
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{
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if (errno == ENOENT) return; /* will be created later on */
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fatal_perror( "cannot open %s", config_dir );
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}
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}
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if (!S_ISDIR(st.st_mode)) fatal_error( "%s is not a directory\n", config_dir );
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init_server_dir( st.st_dev, st.st_ino );
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}
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/* initialize the argv0 path */
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void wine_init_argv0_path( const char *argv0 )
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{
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size_t size, len;
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const char *p;
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char *cwd;
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if (!(p = strrchr( argv0, '/' )))
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{
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argv0_name = xstrdup( argv0 );
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return; /* if argv0 doesn't contain a path, don't store any path */
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}
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else argv0_name = xstrdup( p + 1 );
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len = p - argv0 + 1;
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if (argv0[0] == '/') /* absolute path */
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{
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argv0_path = xmalloc( len + 1 );
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memcpy( argv0_path, argv0, len );
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argv0_path[len] = 0;
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return;
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}
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/* relative path, make it absolute */
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for (size = 256 + len; ; size *= 2)
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{
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if (!(cwd = malloc( size ))) break;
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if (getcwd( cwd, size - len ))
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{
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argv0_path = cwd;
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cwd += strlen(cwd);
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*cwd++ = '/';
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memcpy( cwd, argv0, len );
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cwd[len] = 0;
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return;
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}
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free( cwd );
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if (errno != ERANGE) break;
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}
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}
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/* return the configuration directory ($WINEPREFIX or $HOME/.wine) */
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const char *wine_get_config_dir(void)
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{
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if (!config_dir) init_paths();
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return config_dir;
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}
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/* return the full name of the server directory (the one containing the socket) */
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const char *wine_get_server_dir(void)
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{
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if (!server_dir)
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{
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if (!config_dir) init_paths();
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else
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{
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struct stat st;
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if (stat( config_dir, &st ) == -1)
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{
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if (errno != ENOENT) fatal_error( "cannot stat %s\n", config_dir );
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return NULL; /* will have to try again once config_dir has been created */
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}
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init_server_dir( st.st_dev, st.st_ino );
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}
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}
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return server_dir;
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}
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/* return the current user name */
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const char *wine_get_user_name(void)
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{
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if (!user_name) init_paths();
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return user_name;
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}
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/* exec a binary using the preloader if requested; helper for wine_exec_wine_binary */
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static void preloader_exec( char **argv, char **envp, int use_preloader )
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{
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#ifdef linux
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if (use_preloader)
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{
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static const char preloader[] = "wine-preloader";
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char *p, *full_name;
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char **last_arg = argv, **new_argv;
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if (!(p = strrchr( argv[0], '/' ))) p = argv[0];
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else p++;
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full_name = xmalloc( p - argv[0] + sizeof(preloader) );
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memcpy( full_name, argv[0], p - argv[0] );
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memcpy( full_name + (p - argv[0]), preloader, sizeof(preloader) );
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/* make a copy of argv */
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while (*last_arg) last_arg++;
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new_argv = xmalloc( (last_arg - argv + 2) * sizeof(*argv) );
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memcpy( new_argv + 1, argv, (last_arg - argv + 1) * sizeof(*argv) );
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new_argv[0] = full_name;
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if (envp) execve( full_name, new_argv, envp );
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else execv( full_name, new_argv );
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free( new_argv );
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free( full_name );
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return;
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}
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#endif
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if (envp) execve( argv[0], argv, envp );
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else execv( argv[0], argv );
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}
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/* exec a wine internal binary (either the wine loader or the wine server) */
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void wine_exec_wine_binary( const char *name, char **argv, char **envp, int use_preloader )
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{
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const char *path, *pos, *ptr;
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if (name && strchr( name, '/' ))
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{
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argv[0] = (char *)name;
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preloader_exec( argv, envp, use_preloader );
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return;
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}
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else if (!name) name = argv0_name;
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/* first, try bin directory */
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argv[0] = xmalloc( sizeof(BINDIR "/") + strlen(name) );
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strcpy( argv[0], BINDIR "/" );
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strcat( argv[0], name );
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preloader_exec( argv, envp, use_preloader );
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free( argv[0] );
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/* now try the path of argv0 of the current binary */
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if (argv0_path)
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{
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argv[0] = xmalloc( strlen(argv0_path) + strlen(name) + 1 );
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strcpy( argv[0], argv0_path );
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strcat( argv[0], name );
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preloader_exec( argv, envp, use_preloader );
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free( argv[0] );
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}
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/* now search in the Unix path */
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if ((path = getenv( "PATH" )))
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{
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argv[0] = xmalloc( strlen(path) + strlen(name) + 2 );
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pos = path;
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for (;;)
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{
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while (*pos == ':') pos++;
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if (!*pos) break;
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if (!(ptr = strchr( pos, ':' ))) ptr = pos + strlen(pos);
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memcpy( argv[0], pos, ptr - pos );
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strcpy( argv[0] + (ptr - pos), "/" );
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strcat( argv[0] + (ptr - pos), name );
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preloader_exec( argv, envp, use_preloader );
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pos = ptr;
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}
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free( argv[0] );
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}
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}
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