#include <stdio.h>#include <stdlib.h>#include <sys/times.h>#include <sys/types.h>#include <unistd.h>#include "pstats.h"static struct tms tms_beg;static struct tms tms_end;static int has_times = 0;void pstats_init(void){    has_times = times(&tms_beg) != -1;}static void tms_report(void){    double cputime;    if (! has_times )        return;    times(&tms_end);    cputime = ( ((float)tms_end.tms_utime + tms_end.tms_stime + tms_end.tms_cutime + tms_end.tms_cstime ) -                ((float)tms_beg.tms_utime + tms_beg.tms_stime + tms_beg.tms_cutime + tms_beg.tms_cstime ) )               / sysconf(_SC_CLK_TCK);    fprintf(stderr,"\tcputime=%.3f\n" , cputime);}static void ps_report(void){    char buf[1024];#ifdef __APPLE__ /*  MAC OS X */    sprintf(buf,"ps -o command,majflt,minflt,rss,pagein,vsz -p %d 1>&2",getpid() );#else /* GNU/Linux */    sprintf(buf,"ps -o comm,majflt,minflt,rss,drs,pagein,sz,trs,vsz %d 1>&2",getpid() );#endif        system( buf );}void pstats_report(){    ps_report();    tms_report();}