1*433d6423SLionel Sambuc /* update - do sync periodically Author: Andy Tanenbaum */ 2*433d6423SLionel Sambuc 3*433d6423SLionel Sambuc #include <sys/types.h> 4*433d6423SLionel Sambuc #include <signal.h> 5*433d6423SLionel Sambuc #include <unistd.h> 6*433d6423SLionel Sambuc 7*433d6423SLionel Sambuc int main(void); 8*433d6423SLionel Sambuc main()9*433d6423SLionel Sambucint main() 10*433d6423SLionel Sambuc { 11*433d6423SLionel Sambuc /* Release all (?) open file descriptors. */ 12*433d6423SLionel Sambuc close(0); 13*433d6423SLionel Sambuc close(1); 14*433d6423SLionel Sambuc close(2); 15*433d6423SLionel Sambuc 16*433d6423SLionel Sambuc /* Release current directory to avoid locking current device. */ 17*433d6423SLionel Sambuc chdir("/"); 18*433d6423SLionel Sambuc 19*433d6423SLionel Sambuc /* Flush the cache every 30 seconds. */ 20*433d6423SLionel Sambuc while (1) { 21*433d6423SLionel Sambuc sync(); 22*433d6423SLionel Sambuc sleep(30); 23*433d6423SLionel Sambuc } 24*433d6423SLionel Sambuc } 25