path.c

   1 /* -*- Mode: C ; c-basic-offset: 2 -*- */
   2 /*****************************************************************************
   3  *
   4  *   Access to project specific data files.
   5  *
   6  *   This file is part of gmidimonitor
   7  *
   8  *   Copyright (C) 2005,2006,2007,2008,2011 Nedko Arnaudov <nedko@arnaudov.name>
   9  *
  10  *   This program is free software; you can redistribute it and/or modify
  11  *   it under the terms of the GNU General Public License as published by
  12  *   the Free Software Foundation; version 2 of the License
  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 General Public License for more details.
  18  *
  19  *   You should have received a copy of the GNU General Public License
  20  *   along with this program; if not, write to the Free Software
  21  *   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  22  *
  23  *****************************************************************************/
  24
  25 #include "config.h"
  26
  27 #include <sys/types.h>
  28 #include <sys/stat.h>
  29 #include <unistd.h>
  30 #include <stdlib.h>
  31 #include <gtk/gtk.h>
  32
  33 #include "path.h"
  34
  35 static gchar *pszPathToExecutable = NULL;
  36 static gchar *pszExecutable = NULL;
  37
  38 void
  39 path_init(const char * argv0)
  40 {
  41   /* FIXME: pszPathToExecutable calculation is ugly workaround
  42    * that assumes that current directory is nevere changed for our process.
  43    * We should better get full path (/proc/pid/maps in Linux ?) */
  44   pszExecutable = g_path_get_basename(argv0);
  45   pszPathToExecutable = g_path_get_dirname(argv0);
  46 }
  47
  48 static void
  49 path_check_initialization()
  50 {
  51   if (pszPathToExecutable == NULL ||
  52       pszExecutable == NULL)
  53   {
  54     g_warning("path_init() not called.");
  55     exit(1);
  56   }
  57 }
  58
  59 gchar *
  60 path_get_data_filename(const gchar * filename)
  61 {
  62   gchar * full_path;
  63   struct stat st;
  64
  65   path_check_initialization();
  66
  67   /* check if it can be found in the source dir */
  68   /* This allows a not installed binary to read right data files */
  69   full_path = g_strdup_printf("%s/../%s", pszPathToExecutable, filename);
  70   if (stat(full_path, &st) == 0)
  71   {
  72     return full_path;
  73   }
  74   g_free(full_path);
  75
  76 #if defined(DATA_DIR)
  77   /* check in installation data dir */
  78   full_path = g_strdup_printf(DATA_DIR "/%s", filename);
  79   if (stat(full_path, &st) == 0)
  80   {
  81     return full_path;
  82   }
  83   g_free(full_path);
  84 #endif
  85
  86   return NULL;
  87 }
  88
  89 void
  90 path_uninit()
  91 {
  92   path_check_initialization();
  93
  94   g_free(pszExecutable);
  95   g_free(pszPathToExecutable);
  96 }