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

int main()
{
	int pid;
	FILE *fd;
	char filename[32];

	/* proc file variables */
 	pid_t tpid, ppid, pgid, sid;
	char tcomm[16], state;
	int tty_nr, tty_pgrp, num_threads, exit_signal;
	unsigned long flags, min_flt, cmin_flt, maj_flt, cmaj_flt, vsize, rss;
	unsigned long rsslim, start_code, end_code, start_stack, signal;
	unsigned long blocked, sigign, sigcatch, wchan, dumb, rt_priority;
	unsigned long policy;
	clock_t utime, stime, cutime, cstime, esp, eip;
	long priority, nice;
	unsigned long long start_time, ticks;
	unsigned int task_cpu;

	pid = 1;
	sprintf(filename, "/proc/%d/stat", pid);
	fd = fopen(filename, "r");

	fscanf(fd, "%d %s %c %d %d %d %d %d %lu \
		    %lu %lu %lu %lu %lu %lu %ld \
		    %ld %ld %ld %d %lu %llu %lu \
		    %ld %lu %lu %lu %lu %lu %lu \
		    %lu %lu %lu %lu %lu %lu %lu \
		    %d %d %lu %lu %llu\n", 
	&tpid, tcomm, &state, &ppid, &pgid, &sid, &tty_nr, &tty_pgrp, &flags, 
	&min_flt, &cmin_flt, &maj_flt, &cmaj_flt, &utime, &stime, &cutime, 
	&cstime, &priority, &nice, &num_threads, &dumb, &start_time, &vsize, 
	&rss, &rsslim, &start_code, &end_code, &start_stack, &esp, &eip, 
	&signal, &blocked, &sigign, &sigcatch, &wchan, &dumb, &dumb, 
	&exit_signal, &task_cpu, &rt_priority, &policy, &ticks);

	printf("%d %s: jiffies in user mode: %lu jiffies\n", pid, tcomm, utime);
	printf("%d %s: seconds in user mode: %lu sec\n", pid, tcomm, utime/HZ);
	printf("%d %s: jiffies in kernel mode: %lu jiffies\n", pid, tcomm, stime);
	printf("%d %s: seconds in kernel mode: %lu sec\n", pid, tcomm, stime/HZ);
	fclose(fd);

	return 0;
}