#ifndef _SYS_RESOURCE_H_#define _SYS_RESOURCE_H_#include <sys/time.h>#define RUSAGE_SELF 0/* calling process */#define RUSAGE_CHILDREN -1/* terminated child processes */struct rusage {struct timeval ru_utime;/* user time used */struct timeval ru_stime;/* system time used */};intgetrusage(int,struct rusage*);#endif