#include <sys/time.h> #include <sys/types.h> #include <unistd.h> void usleep(unsigned int usec) { struct timeval tv; tv.tv_sec = usec / 1000000; tv.tv_usec = usec % 1000000; select(0, 0, 0, 0, &tv); } unsigned int sleep(unsigned int sec) { struct timeval tv; tv.tv_sec = sec; tv.tv_usec = 0; select(0, 0, 0, 0, &tv); return tv.tv_sec; }