common/file.c

   1 /* -*- Mode: C ; c-basic-offset: 2 -*- */
   2 /*
   3  * LADI Session Handler (ladish)
   4  *
   5  * Copyright (C) 2010 Nedko Arnaudov <nedko@arnaudov.name>
   6  * Copyright (C) 2010 Nikita Zlobin <cook60020tmp@mail.ru>
   7  *
   8  **************************************************************************
   9  * This file contains the code that implements the about dialog
  10  **************************************************************************
  11  *
  12  * LADI Session Handler is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * LADI Session Handler is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with LADI Session Handler. If not, see <http://www.gnu.org/licenses/>
  24  * or write to the Free Software Foundation, Inc.,
  25  * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  26  */
  27
  28 #include "file.h"
  29
  30 #include <sys/stat.h>
  31 #include <unistd.h>
  32 #include <fcntl.h>
  33 #include <stdlib.h>
  34
  35 char * read_file_contents(const char * filename)
  36 {
  37   int fd;
  38   struct stat st;
  39   char * buffer;
  40
  41   if (stat(filename, &st) != 0)
  42   {
  43     return NULL;
  44   }
  45
  46   fd = open(filename, O_RDONLY);
  47   if (fd == -1)
  48   {
  49     return NULL;
  50   }
  51
  52   buffer = malloc(st.st_size + 1);
  53   if (buffer == NULL)
  54   {
  55     close(fd);
  56     return NULL;
  57   }
  58
  59   if (read(fd, buffer, (size_t)st.st_size) != (ssize_t)st.st_size)
  60   {
  61     free(buffer);
  62     buffer = NULL;
  63   }
  64   else
  65   {
  66     buffer[st.st_size] = 0;
  67   }
  68
  69   close(fd);
  70
  71   return buffer;
  72 }