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 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 <sys/types.h>
  26 #include <sys/stat.h>
  27 #include <unistd.h>
  28 #include <stdlib.h>
  29 #include <gtk/gtk.h>
  30
  31 #include "path.h"
  32
  33 static gchar *pszPathToExecutable = NULL;
  34 static gchar *pszExecutable = NULL;
  35
  36 void
  37 path_init(const char * argv0)
  38 {
  39   /* FIXME: pszPathToExecutable calculation is ugly workaround
  40    * that assumes that current directory is nevere changed for our process.
  41    * We should better get full path (/proc/pid/maps in Linux ?) */
  42   pszExecutable = g_path_get_basename(argv0);
  43   pszPathToExecutable = g_path_get_dirname(argv0);
  44 }
  45
  46 static void
  47 path_check_initialization()
  48 {
  49   if (pszPathToExecutable == NULL ||
  50       pszExecutable == NULL)
  51   {
  52     g_warning("path_init() not called.");
  53     exit(1);
  54   }
  55 }
  56
  57 gchar *
  58 path_get_data_filename(const gchar * filename)
  59 {
  60   gchar * full_path;
  61   struct stat st;
  62
  63   path_check_initialization();
  64
  65   /* check if it can be found where executable resides */
  66   /* This allows executing not installed binary to read right data files */
  67   full_path = g_strdup_printf("%s/%s", pszPathToExecutable, filename);
  68   if (stat(full_path, &st) == 0)
  69   {
  70     return full_path;
  71   }
  72   g_free(full_path);
  73
  74 #if defined(DATA_DIR)
  75   /* check in installation data dir */
  76   full_path = g_strdup_printf(DATA_DIR "/%s", filename);
  77   if (stat(full_path, &st) == 0)
  78   {
  79     return full_path;
  80   }
  81   g_free(full_path);
  82 #endif
  83
  84   return NULL;
  85 }
  86
  87 void
  88 path_uninit()
  89 {
  90   path_check_initialization();
  91
  92   g_free(pszExecutable);
  93   g_free(pszPathToExecutable);
  94 }