path.c

   1 /* -*- Mode: C ; c-basic-offset: 2 -*- */
   2 /*****************************************************************************
   3  *
   4  * DESCRIPTION:
   5  *  Access to project specific data files.
   6  *
   7  * LICENSE:
   8  *  GNU GENERAL PUBLIC LICENSE version 2
   9  *
  10  *****************************************************************************/
  11
  12 #include <sys/types.h>
  13 #include <sys/stat.h>
  14 #include <unistd.h>
  15 #include <stdlib.h>
  16 #include <gtk/gtk.h>
  17
  18 #include "path.h"
  19
  20 static gchar *pszPathToExecutable = NULL;
  21 static gchar *pszExecutable = NULL;
  22
  23 void
  24 path_init(const char * argv0)
  25 {
  26   /* FIXME: pszPathToExecutable calculation is ugly workaround
  27    * that assumes that current directory is nevere changed for our process.
  28    * We should better get full path (/proc/pid/maps in Linux ?) */
  29   pszExecutable = g_path_get_basename(argv0);
  30   pszPathToExecutable = g_path_get_dirname(argv0);
  31 }
  32
  33 static void
  34 path_check_initialization()
  35 {
  36   if (pszPathToExecutable == NULL ||
  37       pszExecutable == NULL)
  38   {
  39     g_warning("path_init() not called.");
  40     exit(1);
  41   }
  42 }
  43
  44 gchar *
  45 path_get_data_filename(const gchar * filename)
  46 {
  47   gchar * full_path;
  48   struct stat st;
  49
  50   path_check_initialization();
  51
  52   /* check if it can be found where executable resides */
  53   /* This allows executing not installed binary to read right data files */
  54   full_path = g_strdup_printf("%s/%s", pszPathToExecutable, filename);
  55   if (stat(full_path, &st) == 0)
  56   {
  57     return full_path;
  58   }
  59   g_free(full_path);
  60
  61 #if defined(DATA_DIR)
  62   /* check in installation data dir */
  63   full_path = g_strdup_printf(DATA_DIR "/%s", filename);
  64   if (stat(full_path, &st) == 0)
  65   {
  66     return full_path;
  67   }
  68   g_free(full_path);
  69 #endif
  70
  71   return NULL;
  72 }
  73
  74 void
  75 path_uninit()
  76 {
  77   path_check_initialization();
  78
  79   g_free(pszExecutable);
  80   g_free(pszPathToExecutable);
  81 }