Sweden-Number/library/config.c

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/*
* Configuration parameters shared between Wine server and clients
*
* Copyright 2002 Alexandre Julliard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "config.h"
#include "wine/port.h"
#include <errno.h>
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
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#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
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#ifdef HAVE_PWD_H
#include <pwd.h>
#endif
static const char * const server_config_dir = "/.wine"; /* config dir relative to $HOME */
static const char * const server_root_prefix = "/tmp/.wine-"; /* prefix for server root dir */
static const char * const server_dir_prefix = "/server-"; /* prefix for server dir */
static char *config_dir;
static char *server_dir;
static char *user_name;
#ifdef __GNUC__
static void fatal_error( const char *err, ... ) __attribute__((noreturn,format(printf,1,2)));
static void fatal_perror( const char *err, ... ) __attribute__((noreturn,format(printf,1,2)));
#endif
/* die on a fatal error */
static void fatal_error( const char *err, ... )
{
va_list args;
va_start( args, err );
fprintf( stderr, "wine: " );
vfprintf( stderr, err, args );
va_end( args );
exit(1);
}
/* die on a fatal error */
static void fatal_perror( const char *err, ... )
{
va_list args;
va_start( args, err );
fprintf( stderr, "wine: " );
vfprintf( stderr, err, args );
perror( " " );
va_end( args );
exit(1);
}
/* malloc wrapper */
static void *xmalloc( size_t size )
{
void *res;
if (!size) size = 1;
if (!(res = malloc( size ))) fatal_error( "virtual memory exhausted\n");
return res;
}
/* strdup wrapper */
static char *xstrdup( const char *str )
{
size_t len = strlen(str) + 1;
char *res = xmalloc( len );
memcpy( res, str, len );
return res;
}
/* remove all trailing slashes from a path name */
inline static void remove_trailing_slashes( char *path )
{
int len = strlen( path );
while (len > 1 && path[len-1] == '/') path[--len] = 0;
}
/* initialize all the paths values */
static void init_paths(void)
{
struct stat st;
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char *p;
const char *home = getenv( "HOME" );
const char *user = NULL;
const char *prefix = getenv( "WINEPREFIX" );
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#ifdef HAVE_GETPWUID
char uid_str[32];
struct passwd *pwd = getpwuid( getuid() );
if (pwd)
{
user = pwd->pw_name;
if (!home) home = pwd->pw_dir;
}
if (!user)
{
sprintf( uid_str, "%d", getuid() );
user = uid_str;
}
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#else /* HAVE_GETPWUID */
if (!(user = getenv( "USER" )))
fatal_error( "cannot determine your user name, set the USER environment variable\n" );
#endif /* HAVE_GETPWUID */
user_name = xstrdup( user );
/* build config_dir */
if (prefix)
{
if (!(config_dir = strdup( prefix ))) fatal_error( "virtual memory exhausted\n");
remove_trailing_slashes( config_dir );
if (config_dir[0] != '/')
fatal_error( "invalid directory %s in WINEPREFIX: not an absolute path\n", prefix );
if (stat( config_dir, &st ) == -1)
fatal_perror( "cannot open %s as specified in WINEPREFIX", config_dir );
}
else
{
if (!home) fatal_error( "could not determine your home directory\n" );
if (home[0] != '/') fatal_error( "your home directory %s is not an absolute path\n", home );
config_dir = xmalloc( strlen(home) + strlen(server_config_dir) + 1 );
strcpy( config_dir, home );
remove_trailing_slashes( config_dir );
strcat( config_dir, server_config_dir );
if (stat( config_dir, &st ) == -1)
fatal_perror( "cannot open %s", config_dir );
}
if (!S_ISDIR(st.st_mode)) fatal_error( "%s is not a directory\n", config_dir );
/* build server_dir */
server_dir = xmalloc( strlen(server_root_prefix) + strlen(user) + strlen( server_dir_prefix ) +
2*sizeof(st.st_dev) + 2*sizeof(st.st_ino) + 2 );
strcpy( server_dir, server_root_prefix );
p = server_dir + strlen(server_dir);
strcpy( p, user );
while (*p)
{
if (*p == '/') *p = '!';
p++;
}
strcpy( p, server_dir_prefix );
if (sizeof(st.st_dev) > sizeof(unsigned long) && st.st_dev > ~0UL)
sprintf( server_dir + strlen(server_dir), "%lx%08lx-",
(unsigned long)(st.st_dev >> 32), (unsigned long)st.st_dev );
else
sprintf( server_dir + strlen(server_dir), "%lx-", (unsigned long)st.st_dev );
if (sizeof(st.st_ino) > sizeof(unsigned long) && st.st_ino > ~0UL)
sprintf( server_dir + strlen(server_dir), "%lx%08lx",
(unsigned long)(st.st_ino >> 32), (unsigned long)st.st_ino );
else
sprintf( server_dir + strlen(server_dir), "%lx", (unsigned long)st.st_ino );
}
/* return the configuration directory ($WINEPREFIX or $HOME/.wine) */
const char *wine_get_config_dir(void)
{
if (!config_dir) init_paths();
return config_dir;
}
/* return the full name of the server directory (the one containing the socket) */
const char *wine_get_server_dir(void)
{
if (!server_dir) init_paths();
return server_dir;
}
/* return the current user name */
const char *wine_get_user_name(void)
{
if (!user_name) init_paths();
return user_name;
}