Function ifsync

src/dd.c:1318–1331

/* Restart on EINTR from fsync.  */

static int
ifsync (int fd)
{
  int ret;

  do
    {
      process_signals ();
      ret = fsync (fd);
    }
  while (ret < 0 && errno == EINTR);

  return ret;
}

/* Restart on EINTR from ftruncate.  */