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