#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <time.h>

int newer(char *fname1, char*fname2);
long int getmtime(char* fname);

int main(int argc, char* argv[])
{
    int value;
    time_t t;
    
    if(argc > 2)
    {
	t = getmtime(argv[1]);
	printf("%s %s \n", argv[1], ctime(&t));
	printf("%s %ld\n", argv[2], t=getmtime(argv[2]));
	printf("%s %s \n", argv[2], ctime(&t));

	value = newer(argv[1], argv[2]);
	if(value == 1)
	    printf("%s is newer than %s\n", argv[1], argv[2]);
	else if(value == -1)
	    printf("%s is older than %s\n", argv[1], argv[2]);
	else
	    printf("both files modified at the same time\n");
    }
    else
	printf("usage: %s file1 file2\n", argv[0]);

    return 0;
}


int newer(char *fname1, char* fname2)
{
    int time1 = getmtime(fname1), time2 = getmtime(fname2);
    
    if(time1 > time2)
	return 1;
    else if (time1 < time2)
	return -1;
    else
	return 0;
}


time_t getmtime(char* fname)
{
    struct stat stb;
    

    if(stat(fname,&stb)<0)
    {
	fprintf(stderr, "Error - stat of %s failed!\n", fname);
	exit(1);
    }

    return (stb.st_mtime);
}