rem: error (0, errno, "%s: fcntl", qname); return -1;
add: error (0, errno, _("%s: fcntl failed"), qname); return false;
context: wipefd (int fd, char const *qname, struct isaac_state *s,	struct Options const *flags){  int fd_flags = fcntl (fd, F_GETFL);  if (fd_flags < 0)    {      error (0, errno, "%s: fcntl", qname);      return -1;    }  if (fd_flags & O_APPEND)    {      error (0, 0, _("%s: cannot shred append-only file descriptor"), qname);      return -1;    }  return do_wipefd (fd, qname, s, flags);}