1 /*- 2 * Copyright (c) 1987, 1990 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #ifndef lint 9 char copyright[] = 10 "@(#) Copyright (c) 1987, 1990 The Regents of the University of California.\n\ 11 All rights reserved.\n"; 12 #endif /* not lint */ 13 14 #ifndef lint 15 static char sccsid[] = "@(#)update.c 5.1 (Berkeley) 06/06/91"; 16 #endif /* not lint */ 17 18 #include <sys/time.h> 19 #include <signal.h> 20 #include <stdlib.h> 21 #include <stdio.h> 22 #include <unistd.h> 23 24 main() 25 { 26 struct itimerval value; 27 void mysync(); 28 29 daemon(0, 0); 30 31 (void)signal(SIGALRM, mysync); 32 33 value.it_interval.tv_sec = 30; 34 value.it_interval.tv_usec = 0; 35 value.it_value = value.it_interval; 36 if (setitimer(ITIMER_REAL, &value, NULL)) { 37 perror("update: setitimer"); 38 exit(1); 39 } 40 for (;;) 41 sigpause(sigblock(0L)); 42 /* NOTREACHED */ 43 } 44 45 void 46 mysync() 47 { 48 (void)sync(); 49 } 50