recursive mkdir

gistfile1.txt

/**
 * mkdir_with_parents()
 *
 * Check for the existence of a dir, and create it if not found.
 * Also creates parent directories.
 */
int mkdir_with_parents (const char *dir, mode_t mode)
{
  if (exists (dir))
    return 0;

  int res = 0;

  char tmp[strlen (dir) + 1];
  strcpy (tmp, dir);
  char *parent = dirname (tmp);
  if (!exists (parent))
    res = mkdir_with_parents (parent, mode);

  if (res)
    return res;

  return mkdir (dir, mode);
}

fails on osx, passes on all versions of gcc and clang on Linux