nullfd            551 src/background.c         int nullfd;
nullfd            564 src/background.c         nullfd = open ("/dev/null", O_RDWR);
nullfd            565 src/background.c         if (nullfd != -1)
nullfd            567 src/background.c             while (dup2 (nullfd, STDIN_FILENO) == -1 && errno == EINTR)
nullfd            569 src/background.c             while (dup2 (nullfd, STDOUT_FILENO) == -1 && errno == EINTR)
nullfd            571 src/background.c             while (dup2 (nullfd, STDERR_FILENO) == -1 && errno == EINTR)
nullfd            573 src/background.c             close (nullfd);