comm              520 src/background.c     int comm[2];                /* control connection stream */
comm              524 src/background.c     if (pipe (comm) == -1)
comm              529 src/background.c         (void) close (comm[0]);
comm              530 src/background.c         (void) close (comm[1]);
comm              540 src/background.c         (void) close (comm[0]);
comm              541 src/background.c         (void) close (comm[1]);
comm              553 src/background.c         parent_fd = comm[1];
comm              581 src/background.c         register_task_running (ctx, pid, comm[0], back_comm[1], info);