Function load_file_data

utils.c:598–642

Sets errno on error (== NULL), * Always ensures terminating zero */

/* Sets errno on error (== NULL),
 * Always ensures terminating zero */
char *
load_file_data (int     fd,
                size_t *size)
{
  cleanup_free char *data = NULL;
  ssize_t data_read;
  ssize_t data_len;
  ssize_t res;

  data_read = 0;
  data_len = 4080;
  data = xmalloc (data_len);

  do
    {
      if (data_len == data_read + 1)
        {
          if (data_len > SSIZE_MAX / 2)
            {
              errno = EFBIG;
              return NULL;
            }

          data_len *= 2;
          data = xrealloc (data, data_len);
        }

      do
        res = read (fd, data + data_read, data_len - data_read - 1);
      while (res < 0 && errno == EINTR);

      if (res < 0)
        return NULL;

      data_read += res;
    }
  while (res > 0);

  data[data_read] = 0;

  if (size)
    *size = (size_t) data_read;

  return steal_pointer (&data);
}

/* Sets errno on error (== NULL),
 * Always ensures terminating zero */