#include "stdio.h"

#include "sys/times.h" #include "time.h" #include "unistd.h" static void do_cmd(char *); int main(int argc,char *argv[])  {    if(argc == 1)     {       printf("Usage: %s cmd\n",argv[0]);       exit(1);     }    struct tms tmsstart,tmsend;    clock_t  start,end;    start=times(&tmsstart);    system(argv[1]);    end=times(&tmsend);    clock_t real=end-start;    // system base start    static long  base= 0;    base=sysconf( _SC_CLK_TCK );    // system base end    printf("real: %7.2f\n",real/(double) base);    printf("user: %7.2f\n",(tmsend.tms_utime-tmsstart.tms_utime)/(double) base);    printf("cpu: %7.2f\n",(tmsend.tms_stime-tmsstart.tms_stime)/(double) base);  }