197 static struct fd_pair sigfd;  variable
811   if (write(sigfd.wr, &ch, 1) != 1) dbg("can't send signal\n");  in signal_handler()
817   if (pipe((int *)&sigfd) < 0) {  in setup_signal()
821   fcntl(sigfd.wr , F_SETFD, FD_CLOEXEC);  in setup_signal()
822   fcntl(sigfd.rd , F_SETFD, FD_CLOEXEC);  in setup_signal()
823   int flags = fcntl(sigfd.wr, F_GETFL);  in setup_signal()
824   fcntl(sigfd.wr, F_SETFL, flags | O_NONBLOCK);  in setup_signal()
1317     FD_SET(sigfd.rd, &rfds);  in dhcp_main()
1322     int maxfd = (sigfd.rd > state->sockfd)? sigfd.rd : state->sockfd;  in dhcp_main()
1417     if (FD_ISSET(sigfd.rd, &rfds)) { // Some Activity on RDFDs : is signal  in dhcp_main()
1419       if (read(sigfd.rd, &sig, 1) != 1) {  in dhcp_main()