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 #ifdef HAVE_UNISTD_H
  31 # include <unistd.h>
  32 #endif
  33 #ifdef HAVE_PWD_H
  34 #include <pwd.h>
  35 #endif
  36
  37 static const char * const server_config_dir = "/.wine";        /* config dir relative to $HOME */
  38 static const char * const server_root_prefix = "/tmp/.wine-";  /* prefix for server root dir */
  39 static const char * const server_dir_prefix = "/server-";      /* prefix for server dir */
  40
  41 static char *config_dir;
  42 static char *server_dir;
  43 static char *user_name;
  44
  45 #ifdef __GNUC__
  46 static void fatal_error( const char *err, ... )  __attribute__((noreturn,format(printf,1,2)));
  47 static void fatal_perror( const char *err, ... )  __attribute__((noreturn,format(printf,1,2)));
  48 #endif
  49
  50 /* die on a fatal error */
  51 static void fatal_error( const char *err, ... )
  52 {
  53     va_list args;
  54
  55     va_start( args, err );
  56     fprintf( stderr, "wine: " );
  57     vfprintf( stderr, err, args );
  58     va_end( args );
  59     exit(1);
  60 }
  61
  62 /* die on a fatal error */
  63 static void fatal_perror( const char *err, ... )
  64 {
  65     va_list args;
  66
  67     va_start( args, err );
  68     fprintf( stderr, "wine: " );
  69     vfprintf( stderr, err, args );
  70     perror( " " );
  71     va_end( args );
  72     exit(1);
  73 }
  74
  75 /* malloc wrapper */
  76 static void *xmalloc( size_t size )
  77 {
  78     void *res;
  79
  80     if (!size) size = 1;
  81     if (!(res = malloc( size ))) fatal_error( "virtual memory exhausted\n");
  82     return res;
  83 }
  84
  85 /* strdup wrapper */
  86 static char *xstrdup( const char *str )
  87 {
  88     size_t len = strlen(str) + 1;
  89     char *res = xmalloc( len );
  90     memcpy( res, str, len );
  91     return res;
  92 }
  93
  94 /* remove all trailing slashes from a path name */
  95 inline static void remove_trailing_slashes( char *path )
  96 {
  97     int len = strlen( path );
  98     while (len > 1 && path[len-1] == '/') path[--len] = 0;
  99 }
 100
 101 /* initialize all the paths values */
 102 static void init_paths(void)
 103 {
 104     struct stat st;
 105     char *p;
 106
 107     const char *home = getenv( "HOME" );
 108     const char *user = NULL;
 109     const char *prefix = getenv( "WINEPREFIX" );
 110
 111 #ifdef HAVE_GETPWUID
 112     char uid_str[32];
 113     struct passwd *pwd = getpwuid( getuid() );
 114
 115     if (pwd)
 116     {
 117         user = pwd->pw_name;
 118         if (!home) home = pwd->pw_dir;
 119     }
 120     if (!user)
 121     {
 122         sprintf( uid_str, "%d", getuid() );
 123         user = uid_str;
 124     }
 125 #else  /* HAVE_GETPWUID */
 126     if (!(user = getenv( "USER" )))
 127         fatal_error( "cannot determine your user name, set the USER environment variable\n" );
 128 #endif  /* HAVE_GETPWUID */
 129     user_name = xstrdup( user );
 130
 131     /* build config_dir */
 132
 133     if (prefix)
 134     {
 135         if (!(config_dir = strdup( prefix ))) fatal_error( "virtual memory exhausted\n");
 136         remove_trailing_slashes( config_dir );
 137         if (config_dir[0] != '/')
 138             fatal_error( "invalid directory %s in WINEPREFIX: not an absolute path\n", prefix );
 139         if (stat( config_dir, &st ) == -1)
 140             fatal_perror( "cannot open %s as specified in WINEPREFIX", config_dir );
 141     }
 142     else
 143     {
 144         if (!home) fatal_error( "could not determine your home directory\n" );
 145         if (home[0] != '/') fatal_error( "your home directory %s is not an absolute path\n", home );
 146         config_dir = xmalloc( strlen(home) + strlen(server_config_dir) + 1 );
 147         strcpy( config_dir, home );
 148         remove_trailing_slashes( config_dir );
 149         strcat( config_dir, server_config_dir );
 150         if (stat( config_dir, &st ) == -1)
 151             fatal_perror( "cannot open %s", config_dir );
 152     }
 153     if (!S_ISDIR(st.st_mode)) fatal_error( "%s is not a directory\n", config_dir );
 154
 155     /* build server_dir */
 156
 157     server_dir = xmalloc( strlen(server_root_prefix) + strlen(user) + strlen( server_dir_prefix ) +
 158                           2*sizeof(st.st_dev) + 2*sizeof(st.st_ino) + 2 );
 159     strcpy( server_dir, server_root_prefix );
 160     p = server_dir + strlen(server_dir);
 161     strcpy( p, user );
 162     while (*p)
 163     {
 164         if (*p == '/') *p = '!';
 165         p++;
 166     }
 167     strcpy( p, server_dir_prefix );
 168
 169     if (sizeof(st.st_dev) > sizeof(unsigned long) && st.st_dev > ~0UL)
 170         sprintf( server_dir + strlen(server_dir), "%lx%08lx-",
 171                  (unsigned long)(st.st_dev >> 32), (unsigned long)st.st_dev );
 172     else
 173         sprintf( server_dir + strlen(server_dir), "%lx-", (unsigned long)st.st_dev );
 174
 175     if (sizeof(st.st_ino) > sizeof(unsigned long) && st.st_ino > ~0UL)
 176         sprintf( server_dir + strlen(server_dir), "%lx%08lx",
 177                  (unsigned long)(st.st_ino >> 32), (unsigned long)st.st_ino );
 178     else
 179         sprintf( server_dir + strlen(server_dir), "%lx", (unsigned long)st.st_ino );
 180 }
 181
 182 /* return the configuration directory ($WINEPREFIX or $HOME/.wine) */
 183 const char *wine_get_config_dir(void)
 184 {
 185     if (!config_dir) init_paths();
 186     return config_dir;
 187 }
 188
 189 /* return the full name of the server directory (the one containing the socket) */
 190 const char *wine_get_server_dir(void)
 191 {
 192     if (!server_dir) init_paths();
 193     return server_dir;
 194 }
 195
 196 /* return the current user name */
 197 const char *wine_get_user_name(void)
 198 {
 199     if (!user_name) init_paths();
 200     return user_name;
 201 }