V10/dk/cmd/dkhup.c

#include <stdio.h>
#include <sys/dkio.h>
#include <signal.h>
#include <ctype.h>

char buf[64] ;

main(argc, argv)
char **argv ;
{
	int f, i;
	int n ;
	int traffic = 2;
	extern rdk_ld;


	signal(SIGINT, SIG_IGN);
	signal(SIGQUIT, SIG_IGN);
	signal(SIGHUP, SIG_IGN);
	signal(SIGTERM, SIG_IGN);
	signal(SIGPIPE, SIG_IGN);
	while (argc > 1) {
		if (strcmp(argv[1], "-t") == 0)
			;
		else if (isdigit(*argv[1]))
			traffic = atoi(argv[1]);
		else
			printf("dkhup: argument %s ignored\n");
		argc--;
		argv++;
	}
	if (fork())
		return(0) ;
restart:
	if ((f = dkctlchan(traffic)) < 0) {
		printf("dkhup: cannot open ctlr channel\n", traffic);
		exit(1);
	}
	if (argc < 3) {
		ioctl(f, DIOCHUP, 0);
		ioctl(f, DIOCHUP, 0);
		ioctl(f, DIOCHUP, 0);
	}
OK:
	ioctl(f, DIOCNXCL, 0);
	for (;;) {
		n = read(f, buf, sizeof buf) ;
		if (n <= 0) {
			for (i=0; i < 5; i++) {
				sleep(1);
				n = read(f, buf, sizeof(buf));
				if (n > 0)
					goto OK;
			}
			printf("Shutting down KMC\n");
			ioctl(f, KIOCSHUT, (char *)0);
			close(f);
			sleep(45);
			printf("reloading KMC\n");
			system("cd /usr/dk; /etc/kmcdump >regs");
			system("/etc/kdiload");
			sleep(5);
			goto restart;
		}
/*
		printf("dkhup: read (size %d) = ", n) ;
		for (i=0; i<n; i++)
			printf("%o ", buf[i]&0377) ;
		printf("\n\r") ;
*/
	}
}