library/config.c

   1 /*
   2  * Configuration parameters shared between Wine server and clients
   3  *
   4  * Copyright 2002 Alexandre Julliard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include "config.h"
  22 #include "wine/port.h"
  23
  24 #include <errno.h>
  25 #include <stdio.h>
  26 #include <stdarg.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29 #include <sys/stat.h>
  30 #include <unistd.h>
  31
  32 #ifdef HAVE_PWD_H
  33 #include <pwd.h>
  34 #endif
  35
  36 static const char * const server_config_dir = "/.wine";        /* config dir relative to $HOME */
  37 static const char * const server_root_prefix = "/tmp/.wine-";  /* prefix for server root dir */
  38 static const char * const server_dir_prefix = "/server-";      /* prefix for server dir */
  39
  40 static char *config_dir;
  41 static char *server_dir;
  42
  43 #ifdef __GNUC__
  44 static void fatal_error( const char *err, ... )  __attribute__((noreturn,format(printf,1,2)));
  45 static void fatal_perror( const char *err, ... )  __attribute__((noreturn,format(printf,1,2)));
  46 #endif
  47
  48 /* die on a fatal error */
  49 static void fatal_error( const char *err, ... )
  50 {
  51     va_list args;
  52
  53     va_start( args, err );
  54     fprintf( stderr, "wine: " );
  55     vfprintf( stderr, err, args );
  56     va_end( args );
  57     exit(1);
  58 }
  59
  60 /* die on a fatal error */
  61 static void fatal_perror( const char *err, ... )
  62 {
  63     va_list args;
  64
  65     va_start( args, err );
  66     fprintf( stderr, "wine: " );
  67     vfprintf( stderr, err, args );
  68     perror( " " );
  69     va_end( args );
  70     exit(1);
  71 }
  72
  73 /* malloc wrapper */
  74 static void *xmalloc( size_t size )
  75 {
  76     void *res;
  77
  78     if (!size) size = 1;
  79     if (!(res = malloc( size ))) fatal_error( "virtual memory exhausted\n");
  80     return res;
  81 }
  82
  83 /* remove all trailing slashes from a path name */
  84 inline static void remove_trailing_slashes( char *path )
  85 {
  86     int len = strlen( path );
  87     while (len > 1 && path[len-1] == '/') path[--len] = 0;
  88 }
  89
  90 /* initialize all the paths values */
  91 static void init_paths(void)
  92 {
  93     struct stat st;
  94     char *p;
  95
  96     const char *home = getenv( "HOME" );
  97     const char *user = NULL;
  98     const char *prefix = getenv( "WINEPREFIX" );
  99
 100 #ifdef HAVE_GETPWUID
 101     char uid_str[32];
 102     struct passwd *pwd = getpwuid( getuid() );
 103
 104     if (pwd)
 105     {
 106         user = pwd->pw_name;
 107         if (!home) home = pwd->pw_dir;
 108     }
 109     if (!user)
 110     {
 111         sprintf( uid_str, "%d", getuid() );
 112         user = uid_str;
 113     }
 114 #else  /* HAVE_GETPWUID */
 115     if (!(user = getenv( "USER" )))
 116         fatal_error( "cannot determine your user name, set the USER environment variable\n" );
 117 #endif  /* HAVE_GETPWUID */
 118
 119     /* build config_dir */
 120
 121     if (prefix)
 122     {
 123         if (!(config_dir = strdup( prefix ))) fatal_error( "virtual memory exhausted\n");
 124         remove_trailing_slashes( config_dir );
 125         if (config_dir[0] != '/')
 126             fatal_error( "invalid directory %s in WINEPREFIX: not an absolute path\n", prefix );
 127         if (stat( config_dir, &st ) == -1)
 128             fatal_perror( "cannot open %s as specified in WINEPREFIX", config_dir );
 129     }
 130     else
 131     {
 132         if (!home) fatal_error( "could not determine your home directory\n" );
 133         if (home[0] != '/') fatal_error( "your home directory %s is not an absolute path\n", home );
 134         config_dir = xmalloc( strlen(home) + strlen(server_config_dir) + 1 );
 135         strcpy( config_dir, home );
 136         remove_trailing_slashes( config_dir );
 137         strcat( config_dir, server_config_dir );
 138         if (stat( config_dir, &st ) == -1)
 139             fatal_perror( "cannot open %s", config_dir );
 140     }
 141     if (!S_ISDIR(st.st_mode)) fatal_error( "%s is not a directory\n", config_dir );
 142
 143     /* build server_dir */
 144
 145     server_dir = xmalloc( strlen(server_root_prefix) + strlen(user) + strlen( server_dir_prefix ) +
 146                           2*sizeof(st.st_dev) + 2*sizeof(st.st_ino) + 2 );
 147     strcpy( server_dir, server_root_prefix );
 148     p = server_dir + strlen(server_dir);
 149     strcpy( p, user );
 150     while (*p)
 151     {
 152         if (*p == '/') *p = '!';
 153         p++;
 154     }
 155     strcpy( p, server_dir_prefix );
 156
 157     if (sizeof(st.st_dev) > sizeof(unsigned long))
 158         sprintf( server_dir + strlen(server_dir), "%llx-", (unsigned long long)st.st_dev );
 159     else
 160         sprintf( server_dir + strlen(server_dir), "%lx-", (unsigned long)st.st_dev );
 161
 162     if (sizeof(st.st_ino) > sizeof(unsigned long))
 163         sprintf( server_dir + strlen(server_dir), "%llx", (unsigned long long)st.st_ino );
 164     else
 165         sprintf( server_dir + strlen(server_dir), "%lx", (unsigned long)st.st_ino );
 166 }
 167
 168 /* return the configuration directory ($WINEPREFIX or $HOME/.wine) */
 169 const char *wine_get_config_dir(void)
 170 {
 171     if (!config_dir) init_paths();
 172     return config_dir;
 173 }
 174
 175 /* return the full name of the server directory (the one containing the socket) */
 176 const char *wine_get_server_dir(void)
 177 {
 178     if (!server_dir) init_paths();
 179     return server_dir;
 180 }