.sp
.B int idle(void);
.SH DESCRIPTION
-.B idle
+.BR idle ()
is an internal system call used during bootstrap.
It marks the process's pages as swappable, lowers its priority,
and enters the main scheduling loop.
-.B idle
+.BR idle ()
never returns.
.PP
Only process 0 may call
-.BR idle .
+.BR idle ().
Any user process, even a process with superuser permission,
will receive
.BR EPERM .
.SH "RETURN VALUE"
-.B idle
+.BR idle ()
never returns for process 0, and always returns \-1 for a user process.
.SH ERRORS
.TP