src/posix/dirs.c

   1 /*****************************************************************************
   2  * dirs.c: XDG directories configuration
   3  *****************************************************************************
   4  * Copyright (C) 2001-2007 VLC authors and VideoLAN
   5  * Copyright © 2007-2009 Rémi Denis-Courmont
   6  *
   7  * Authors: Gildas Bazin <gbazin@videolan.org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify it
  10  * under the terms of the GNU Lesser General Public License as published by
  11  * the Free Software Foundation; either version 2.1 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  17  * GNU Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public License
  20  * along with this program; if not, write to the Free Software Foundation,
  21  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 #ifdef HAVE_CONFIG_H
  25 # include "config.h"
  26 #endif
  27
  28 #include <vlc_common.h>
  29
  30 #include "../libvlc.h"
  31 #include "config/configuration.h"
  32
  33 #include <unistd.h>
  34 #include <pwd.h>
  35 #include <assert.h>
  36 #include <limits.h>
  37
  38 #if !defined (__linux__)
  39 /**
  40  * Determines the shared data directory
  41  *
  42  * @return a nul-terminated string or NULL. Use free() to release it.
  43  */
  44 char *config_GetDataDir (void)
  45 {
  46     const char *path = getenv ("VLC_DATA_PATH");
  47     return strdup ((path != NULL) ? path : PKGDATADIR);
  48 }
  49
  50 /**
  51  * Determines the architecture-dependent data directory
  52  *
  53  * @return a string (always succeeds).
  54  */
  55 char *config_GetLibDir (void)
  56 {
  57     return strdup (PKGLIBDIR);
  58 }
  59 #endif
  60
  61 static char *config_GetHomeDir (void)
  62 {
  63     /* 1/ Try $HOME  */
  64     const char *home = getenv ("HOME");
  65     if (home != NULL)
  66         return strdup (home);
  67 #if defined(HAVE_GETPWUID_R)
  68     /* 2/ Try /etc/passwd */
  69     long max = sysconf (_SC_GETPW_R_SIZE_MAX);
  70     if (max != -1)
  71     {
  72         char buf[max];
  73         struct passwd pwbuf, *pw;
  74
  75         if (getpwuid_r (getuid (), &pwbuf, buf, sizeof (buf), &pw) == 0
  76           && pw != NULL)
  77             return strdup (pw->pw_dir);
  78     }
  79 #endif
  80     return NULL;
  81 }
  82
  83 static char *config_GetAppDir (const char *xdg_name, const char *xdg_default)
  84 {
  85     char *psz_dir;
  86     char var[sizeof ("XDG__HOME") + strlen (xdg_name)];
  87
  88     /* XDG Base Directory Specification - Version 0.6 */
  89     snprintf (var, sizeof (var), "XDG_%s_HOME", xdg_name);
  90
  91     const char *home = getenv (var);
  92     if (home != NULL)
  93     {
  94         if (asprintf (&psz_dir, "%s/vlc", home) == -1)
  95             psz_dir = NULL;
  96         return psz_dir;
  97     }
  98
  99     char *psz_home = config_GetHomeDir ();
 100     if( psz_home == NULL
 101      || asprintf( &psz_dir, "%s/%s/vlc", psz_home, xdg_default ) == -1 )
 102         psz_dir = NULL;
 103     free (psz_home);
 104     return psz_dir;
 105 }
 106
 107 static char *config_GetTypeDir (const char *xdg_name)
 108 {
 109     const size_t namelen = strlen (xdg_name);
 110     const char *home = getenv ("HOME");
 111     const char *dir = getenv ("XDG_CONFIG_HOME");
 112     const char *file = "user-dirs.dirs";
 113
 114     if (home == NULL)
 115         return NULL;
 116     if (dir == NULL)
 117     {
 118         dir = home;
 119         file = ".config/user-dirs.dirs";
 120     }
 121
 122     char *path;
 123     if (asprintf (&path, "%s/%s", dir, file) == -1)
 124         return NULL;
 125
 126     FILE *stream = fopen (path, "rte");
 127     free (path);
 128     path = NULL;
 129     if (stream != NULL)
 130     {
 131         char *linebuf = NULL;
 132         size_t linelen = 0;
 133
 134         while (getline (&linebuf, &linelen, stream) != -1)
 135         {
 136             char *ptr = linebuf;
 137             ptr += strspn (ptr, " \t"); /* Skip whites */
 138             if (strncmp (ptr, "XDG_", 4))
 139                 continue;
 140             ptr += 4; /* Skip XDG_ */
 141             if (strncmp (ptr, xdg_name, namelen))
 142                 continue;
 143             ptr += namelen; /* Skip XDG type name */
 144             if (strncmp (ptr, "_DIR", 4))
 145                 continue;
 146             ptr += 4; /* Skip _DIR */
 147             ptr += strspn (ptr, " \t"); /* Skip whites */
 148             if (*ptr != '=')
 149                 continue;
 150             ptr++; /* Skip equality sign */
 151             ptr += strspn (ptr, " \t"); /* Skip whites */
 152             if (*ptr != '"')
 153                 continue;
 154             ptr++; /* Skip quote */
 155             linelen -= ptr - linebuf;
 156
 157             char *out;
 158             if (strncmp (ptr, "$HOME", 5))
 159             {
 160                 path = malloc (linelen);
 161                 if (path == NULL)
 162                     continue;
 163                 out = path;
 164             }
 165             else
 166             {   /* Prefix with $HOME */
 167                 const size_t homelen = strlen (home);
 168                 ptr += 5;
 169                 path = malloc (homelen + linelen - 5);
 170                 if (path == NULL)
 171                     continue;
 172                 memcpy (path, home, homelen);
 173                 out = path + homelen;
 174             }
 175
 176             while (*ptr != '"')
 177             {
 178                 if (*ptr == '\\')
 179                     ptr++;
 180                 if (*ptr == '\0')
 181                 {
 182                     free (path);
 183                     path = NULL;
 184                     break;
 185                 }
 186                 *(out++) = *(ptr++);
 187             }
 188             if (path != NULL)
 189                 *out = '\0';
 190             break;
 191         }
 192         free (linebuf);
 193         fclose (stream);
 194     }
 195
 196     /* Default! */
 197     if (path == NULL)
 198     {
 199         if (strcmp (xdg_name, "DESKTOP") == 0)
 200         {
 201             if (asprintf (&path, "%s/Desktop", home) == -1)
 202                 return NULL;
 203         }
 204         else
 205             path = strdup (home);
 206     }
 207
 208     return path;
 209 }
 210
 211
 212 char *config_GetUserDir (vlc_userdir_t type)
 213 {
 214     switch (type)
 215     {
 216         case VLC_HOME_DIR:
 217             break;
 218         case VLC_CONFIG_DIR:
 219             return config_GetAppDir ("CONFIG", ".config");
 220         case VLC_DATA_DIR:
 221             return config_GetAppDir ("DATA", ".local/share");
 222         case VLC_CACHE_DIR:
 223             return config_GetAppDir ("CACHE", ".cache");
 224
 225         case VLC_DESKTOP_DIR:
 226             return config_GetTypeDir ("DESKTOP");
 227         case VLC_DOWNLOAD_DIR:
 228             return config_GetTypeDir ("DOWNLOAD");
 229         case VLC_TEMPLATES_DIR:
 230             return config_GetTypeDir ("TEMPLATES");
 231         case VLC_PUBLICSHARE_DIR:
 232             return config_GetTypeDir ("PUBLICSHARE");
 233         case VLC_DOCUMENTS_DIR:
 234             return config_GetTypeDir ("DOCUMENTS");
 235         case VLC_MUSIC_DIR:
 236             return config_GetTypeDir ("MUSIC");
 237         case VLC_PICTURES_DIR:
 238             return config_GetTypeDir ("PICTURES");
 239         case VLC_VIDEOS_DIR:
 240             return config_GetTypeDir ("VIDEOS");
 241     }
 242     return config_GetHomeDir ();
 243 }