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	#ifndef _SYS_SYSPROTO_H_			#ifndef _SYS_SYSPROTO_H_
	struct getsid_args {			struct getsid_args {
	pid_t pid;			pid_t pid;
	};			};
	#endif			#endif
	int			int
	sys_getsid(struct thread td, struct getsid_args uap)			sys_getsid(struct thread td, struct getsid_args uap)
	{			{

				return (kern_getsid(td, uap->pid));
				}

				int
				kern_getsid(struct thread *td, pid_t pid)
				{
	struct proc *p;			struct proc *p;
	int error;			int error;

	if (uap->pid == 0) {			if (pid == 0) {
	p = td->td_proc;			p = td->td_proc;
	PROC_LOCK(p);			PROC_LOCK(p);
	} else {			} else {
	p = pfind(uap->pid);			p = pfind(pid);
	if (p == NULL)			if (p == NULL)
	return (ESRCH);			return (ESRCH);
	error = p_cansee(td, p);			error = p_cansee(td, p);
	if (error) {			if (error) {
	PROC_UNLOCK(p);			PROC_UNLOCK(p);
	return (error);			return (error);
	}			}
	}			}
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