appworx> ./tmer
10085397
Resource usage for PID 25360:
  LWP ID: 0
  Number of LWPs: 1
  Timestamp: 5711964.772491400
  Creation time: 5711960.622692600
  Termination time: 0.0
  Real (elapsed) time: 4.149402400
  User CPU time: 3.618758600
  System CPU time: 0.530350100
  System trap CPU time: 0.204900
  Text page fault CPU time: 0.0
  Data page fault CPU time: 0.0
  Kernel page fault CPU time: 0.0
  User lock wait time: 0.0
  Other sleep time: 0.0
  CPU latency time: 0.59100
  Stopped time: 0.29700
  Minor faults: 0
  Major faults: 0
  Number of swaps: 0
  Input blocks: 0
  Output blocks: 0
  Messages sent: 0
  Messages received: 0
  Signals received: 0
  Voluntary context switches: 0
  Involuntary context switches: 44
  System calls: 10085457
  Characters read/written: 9

#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/resource.h> 
#include <time.h>
#ifdef NEED_SNPRINTF
#include <sys/procfs.h>
#else
#include <sys/old_procfs.h>
#endif
#include <limits.h>


int getprusage (pid_t, prusage_t *);
void print_rusage(pid_t, prusage_t *);
void tmer(int, char **);
char dest[64]={0x0};


int main (int argc, char **argv)
{
	prusage_t buf;
	
  tmer(argc, argv);
  if(getprusage (-1, &buf) == -1)
	{
		perror("getprusage failed"); 
		exit(1);
	}		
  print_rusage (getpid (), &buf);
	return 0;
}

void tmer(int argc, char **argv)
{
    size_t add =(argc>1) ? atol(argv[1]): 5;
    time_t tm=time(NULL);
    double z=0;
    tm+=add;
    while(time(NULL) < tm) z++;
    printf("%.0f\n", z);
    return;
}


int getprusage (pid_t pid, prusage_t *pr_usage)
{
	int fd;
	char name [PATH_MAX];

	if (pid == -1)
		snprintf (name, PATH_MAX, "/proc/%ld", (long) getpid ());
	else
		snprintf (name, PATH_MAX, "/proc/%ld", (long) pid);

	if ((fd = open (name, O_RDONLY)) == -1)
		return (-1);

	if (ioctl (fd, PIOCUSAGE, pr_usage) == -1) {
		close (fd);
		return (-1);
	}
	else {
		close (fd);
		return (0);
	}
}

 void print_rusage (pid_t pid, prusage_t *buf)
{
  printf ("Resource usage for PID %ld:\n", (long) pid);
  printf ("  LWP ID: %ld\n", (long) buf -> pr_lwpid);
  printf ("  Number of LWPs: %d\n", (int) buf -> pr_count);
  printf ("  Timestamp: %ld.%ld\n", buf -> pr_tstamp.tv_sec,
  	buf -> pr_tstamp.tv_nsec);
  printf ("  Creation time: %ld.%ld\n", buf -> pr_create.tv_sec,
  	buf -> pr_create.tv_nsec);
  printf ("  Termination time: %ld.%ld\n", buf -> pr_term.tv_sec,
  	buf -> pr_term.tv_nsec);
  printf ("  Real (elapsed) time: %ld.%ld\n", buf -> pr_rtime.tv_sec,
  	buf -> pr_rtime.tv_nsec);
  printf ("  User CPU time: %ld.%ld\n", buf -> pr_utime.tv_sec,
  	buf -> pr_utime.tv_nsec);
  printf ("  System CPU time: %ld.%ld\n", buf -> pr_stime.tv_sec,
  	buf -> pr_stime.tv_nsec);
  printf ("  System trap CPU time: %ld.%ld\n", buf -> pr_ttime.tv_sec,
  	buf -> pr_ttime.tv_nsec);
  printf ("  Text page fault CPU time: %ld.%ld\n", buf -> pr_tftime.tv_sec,
  	buf -> pr_tftime.tv_nsec);
  printf ("  Data page fault CPU time: %ld.%ld\n", buf -> pr_dftime.tv_sec,
  	buf -> pr_dftime.tv_nsec);
  printf ("  Kernel page fault CPU time: %ld.%ld\n", buf -> pr_kftime.tv_sec,
  	buf -> pr_kftime.tv_nsec);
  printf ("  User lock wait time: %ld.%ld\n", buf -> pr_ltime.tv_sec,
  	buf -> pr_ltime.tv_nsec);
  printf ("  Other sleep time: %ld.%ld\n", buf -> pr_slptime.tv_sec,
  	buf -> pr_slptime.tv_nsec);
  printf ("  CPU latency time: %ld.%ld\n", buf -> pr_wtime.tv_sec,
  	buf -> pr_wtime.tv_nsec);
  printf ("  Stopped time: %ld.%ld\n", buf -> pr_stoptime.tv_sec,
  	buf -> pr_stoptime.tv_nsec);
  printf ("  Minor faults: %ld\n", buf -> pr_minf);
  printf ("  Major faults: %ld\n", buf -> pr_majf);
  printf ("  Number of swaps: %ld\n", buf -> pr_nswap);
  printf ("  Input blocks: %ld\n", buf -> pr_inblk);
  printf ("  Output blocks: %ld\n", buf -> pr_oublk);
  printf ("  Messages sent: %ld\n", buf -> pr_msnd);
  printf ("  Messages received: %ld\n", buf -> pr_mrcv);
  printf ("  Signals received: %ld\n", buf -> pr_sigs);
  printf ("  Voluntary context switches: %ld\n", buf -> pr_vctx);
  printf ("  Involuntary context switches: %ld\n", buf -> pr_ictx);
  printf ("  System calls: %ld\n", buf -> pr_sysc);
	printf ("  Characters read/written: %ld\n", buf -> pr_ioch); 
	return;
}