common.c

   1 /*
   2  * This program is free software; you can redistribute it and/or
   3  * modify it under the terms of the GNU General Public
   4  * License v2 as published by the Free Software Foundation.
   5  *
   6  * This program is distributed in the hope that it will be useful,
   7  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   8  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   9  * General Public License for more details.
  10  *
  11  * You should have received a copy of the GNU General Public
  12  * License along with this program; if not, write to the
  13  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  14  * Boston, MA 021110-1307, USA.
  15  */
  16
  17 #include <sys/types.h>
  18 #include <sys/stat.h>
  19 #include <dirent.h>
  20 #include <fcntl.h>
  21
  22 int open_file_or_dir(const char *fname)
  23 {
  24         int ret;
  25         struct stat st;
  26         DIR *dirstream;
  27         int fd;
  28
  29         ret = stat(fname, &st);
  30         if (ret < 0) {
  31                 return -1;
  32         }
  33         if (S_ISDIR(st.st_mode)) {
  34                 dirstream = opendir(fname);
  35                 if (!dirstream) {
  36                         return -2;
  37                 }
  38                 fd = dirfd(dirstream);
  39         } else {
  40                 fd = open(fname, O_RDWR);
  41         }
  42         if (fd < 0) {
  43                 return -3;
  44         }
  45         return fd;
  46 }