[unix-history] / usr / src / usr.sbin / update / update.c

static char *sccsid = "@(#)update.c	4.2 (Berkeley) %G%";
/*
 * Update the file system every 30 seconds.
 * For cache benefit, open certain system directories.
 */

#include <signal.h>

char *fillst[] = {
	"/bin",
	"/lib",
	"/usr",
	"/usr/bin",
	"/usr/lib",
	"/usr/ucb",
	0,
};

main()
{
	char **f;

	if(fork())
		exit(0);
	close(0);
	close(1);
	close(2);
	for(f = fillst; *f; f++)
		open(*f, 0);
	dosync();
	for(;;)
		pause();
}

dosync()
{
	sync();
	signal(SIGALRM, dosync);
	alarm(30);
}
Commit	Line	Data
9f40bd24	1	static char *sccsid = "@(#)update.c 4.2 (Berkeley) %G%";
a675940b BJ	2	/*
	3	* Update the file system every 30 seconds.
	4	* For cache benefit, open certain system directories.
	5	*/
	6
	7	#include <signal.h>
	8
	9	char *fillst[] = {
	10	"/bin",
9f40bd24	11	"/lib",
a675940b BJ	12	"/usr",
a675940b BJ	13	"/usr/bin",
9f40bd24 BJ	14	"/usr/lib",
9f40bd24 BJ	15	"/usr/ucb",
a675940b BJ	16	0,
	17	};
	18
	19	main()
	20	{
	21	char **f;
	22
	23	if(fork())
	24	exit(0);
	25	close(0);
	26	close(1);
	27	close(2);
	28	for(f = fillst; *f; f++)
	29	open(*f, 0);
	30	dosync();
	31	for(;;)
	32	pause();
	33	}
	34
	35	dosync()
	36	{
	37	sync();
	38	signal(SIGALRM, dosync);
	39	alarm(30);
	40	}