back_comm         521 src/background.c     int back_comm[2];           /* back connection */
back_comm         527 src/background.c     if (pipe (back_comm) == -1)
back_comm         542 src/background.c         (void) close (back_comm[0]);
back_comm         543 src/background.c         (void) close (back_comm[1]);
back_comm         554 src/background.c         from_parent_fd = back_comm[0];
back_comm         581 src/background.c         register_task_running (ctx, pid, comm[0], back_comm[1], info);