utmp fix?

[John F Haugh II]

In article <1991May30.011132.28981 at magnus.acs.ohio-state.edu> mcover at magnus.acs.ohio-state.edu (Mark Coverdill) writes:
>   I typed in a program I saw about two weeks back to fix this
>problem but that had no effect and have been unable to locate it
>in various archives. Soooo, if someone would kindly repost the
>entire procedure on how to do this or tell me where I can ftp
>the procedure to cleanup the utmp file I would appreciate it.

This is a program that I use here to keep my utmp file clean.  I
posted it once before and someone at IBM brushed it up and made
it look pretty.  Here it is again ...
-- 
#include <sys/types.h>
#include <utmp.h>
#include <fcntl.h>

main ()
{
	int	fd;
	struct	utmp	utmp;

	while (1) {
		if ((fd = open ("/etc/utmp", O_RDWR)) < 0)
			exit (1);

		while (read (fd, &utmp, sizeof utmp) == sizeof utmp) {
			if (utmp.ut_type == USER_PROCESS &&
					kill (utmp.ut_pid, 0) != 0) {
				lseek (fd, - (long) sizeof utmp, 1);
				utmp.ut_type = DEAD_PROCESS;
				write (fd, &utmp, sizeof utmp);
			}
		}
		close (fd);
		sleep (60);
	}
}
-- 
John F. Haugh II        | Distribution to  | UUCP: ...!cs.utexas.edu!rpp386!jfh
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