Function find_xdg_config

modules/dasSQLITE/sqlite/shell.c:26717–26742

** On non-Windows platforms, look for $XDG_CONFIG_HOME. ** If ${XDG_CONFIG_HOME}/sqlite3/sqliterc is found, return ** the path to it, else return 0. The result is cached for ** subsequent calls. */

** subsequent calls.
*/
static const char *find_xdg_config(void){
#if defined(_WIN32) || defined(WIN32) || defined(_WIN32_WCE) \
     || defined(__RTP__) || defined(_WRS_KERNEL)
  return 0;
#else
  static int alreadyTried = 0;
  static char *zConfig = 0;
  const char *zXdgHome;

  if( alreadyTried!=0 ){
    return zConfig;
  }
  alreadyTried = 1;
  zXdgHome = getenv("XDG_CONFIG_HOME");
  if( zXdgHome==0 ){
    return 0;
  }
  zConfig = sqlite3_mprintf("%s/sqlite3/sqliterc", zXdgHome);
  shell_check_oom(zConfig);
  if( access(zConfig,0)!=0 ){
    sqlite3_free(zConfig);
    zConfig = 0;
  }
  return zConfig;
#endif
}

/*
** Read input from the file given by sqliterc_override.  Or if that