extern int kill(int pid, int sig);
extern void wait(int miliseconds);
extern int waittid(int id, int *status);
extern int clone(int flags, void *stack);
extern int execve(char *path, char **argv, char **envp);
extern int kill(int pid, int sig);
extern void wait(int miliseconds);
extern int waittid(int id, int *status);
extern int clone(int flags, void *stack);
extern int execve(char *path, char **argv, char **envp);