smnb

#include <stdlib.h>
char *getenv(const char *NAME);
int putenv,(char *__string);
int setenv,(const char *__string, const char*__value, int __overwrite);
void unsetenv,(const char *__string);
// clearenv(); // ???

#include <linux/resource.h>
int getrusage(struct task_struct *p, int who, struct rusage __user *ru);

#include/sys/time.h
int gettimeofday, (struct timeval *__p, void *__z);
#include <time.h>
time_t time(time_t *T);
struct tm *localtime(time_t *CLOCK);
struct tm *localtime_r(time_t *CLOCK, struct tm *RES);
struct tm *gmtime(const time_t *CLOCK);
struct tm *gmtime_r(const time_t *CLOCK, struct tm *RES);
time_t mktime,   (struct tm *_timeptr);
char *asctime(const struct tm *CLOCK);
char *asctime_r(const struct tm *CLOCK, char *BUF);
char *ctime(const time_t *CLOCK);
char *ctime_r(const time_t *CLOCK, char *BUF);
size_t strftime(char *S, size_t MAXSIZE, const char *FORMAT, const struct tm *TIMP);