Code:
#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;
}
