# ifndef lint

static char Sccs_id[] = "%W%	(NTUA hackers)	(%G%)";

# endif

#include 	<stdio.h>
#include 	<sys/param.h>
#include 	<sys/types.h>
#include 	<sys/time.h>
#include 	<sys/stat.h>


char    *ctime ();
long    gettimeofday ();
struct  timeval *tp;
struct  timezone *tzp;
long    x;

int     month[2][12] = {
	{2678400, 2419200, 2678400, 2592000, 2678400, 2592000,
	 2678400, 2678400, 2592000, 2678400, 2592000, 2678400},
	{2678400, 2505600, 2678400, 2592000, 2678400, 2592000,
	 2678400, 2678400, 2592000, 2678400, 2592000, 2678400}
};

int     date, hour, date1, date2, date3, hour1, hour2;

/*
 * chtim: change the modification date of a file
 */

main (argc, argv)
register int   argc;
register char   **argv; 
{
	register int    i, j, total;
	char   *path = "/etc/passwd";
	char   *prog = *argv;
	struct stat    *stb;
	struct timeval *tvp[2];
	long    txp[4];

	tp = (struct timeval   *) malloc (sizeof (struct timeval));
	tzp = (struct timezone *) malloc (sizeof (struct timezone));
	stb = (struct stat     *) malloc (sizeof (struct stat));
	if (argc != 4) {
		fprintf (stderr, "%s: Usage: %s ddmmyy hhmm  filename\n",
			 prog, prog);
		exit (1);
	}
	else {
		date = atoi (argv[1]);
		hour = atoi (argv[2]);
		date1 = date / 10000;
		date2 = (date - 10000 * date1) / 100;
		date3 = date % 100;
		hour1 = hour / 100;
		hour2 = hour % 100;
		if (argc == 4)
			path = argv[3];
		total = 0;
		for (i = 70; i < date3; i++)
			if (((i % 4) == 0))
				total += 31622400;
			else
				total += 31536000;
		for (i = 0; i < (date2 - 1); i++)
			if ((date3 % 4) == 0)
				total += month[1][i];
			else
				total += month[0][i];
		total += (date1 - 1) * 24 * 3600 + hour1 * 3600 + hour2 * 60;
		gettimeofday (tp, tzp);
		total += tzp -> tz_minuteswest * 60;
	     /* txp[0]=tp->tv_sec; txp[1]=tp->tv_usec;
	        txp[2]=tp->tv_sec; txp[3]=tp->tv_usec; */
		txp[0] = total;
		txp[1] = 0;
		txp[2] = total;
		txp[3] = 0;
		if (utimes (path, txp) == -1) {
			fprintf(stderr, "%s: utimes failed\n", prog);
			exit(2);
		}
	}
	exit(0);
}