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-.TH EXIT 2
-.CT 2 time_man proc_man
-.SH NAME
-_exit, wait wait3 \(mi terminate process, wait for child to terminate
-.SH SYNOPSIS
-.nf
-.B void _exit(status)
-.B int status;
-.PP
-.B int wait(status)
-.B int *status;
-.PP
-.B int wait((int *)0)
-.PP
-.B #include <sys/vtimes.h>
-.PP
-.B wait3(status, options, ch_vt)
-.B int *status;
-.B struct vtimes *ch_vt;
-.fi
-.SH DESCRIPTION
-.I _exit
-closes all the process's files and notifies the parent process
-when the parent executes
-.IR wait .
-The low-order 8 bits of
-.I status
-are available to the parent process.
-The call never returns.
-.PP
-The function
-.IR exit (3),
-which is the normal means of terminating a process,
-may cause cleanup actions before finally calling
-.IR _exit .
-Therefore,
-.I _exit
-should be called to terminate a child
-process after a
-.IR fork (2)
-to avoid flushing buffered output twice.
-.PP
-.I Wait
-delays until a signal is received or until
-a child processes terminates or receives signal
-.BR SIGSTOP  .
-There is no delay if any child has died since the last
-.I wait,
-or if there are no extant children.
-The normal return yields the process id 
-and status of one terminated child.
-The status of other children 
-may be learned from further
-.I wait
-calls.
-.PP
-If
-.I status
-is nonzero,
-.I wait
-sets
-.IR \f5*\fPstatus " = (" s <<8)+ t
-where
-.I s
-is the low 8 bits
-of
-.I status
-from the child's
-.IR exit ,
-if any,
-and
-.I t
-is the termination status of the child.
-If the security label of the waiting process does not
-dominate that of the exiting process, then nonzero
-.BR * status
-is always reported as
-.BR SIGTERM .
-See
-.IR signal (2)
-for a list of termination statuses (signals);
-status 0 indicates normal termination, 0177
-a (restartable) process stopped on
-.BR SIGSTOP .
-If the 0200
-bit of the termination status
-is set,
-a core image of the process was produced
-by the system.
-.PP
-.I Wait3
-is similar to
-.I wait.
-An
-.I option
-value of 1 prevents waiting for extant, non-stopped children.
-If
-.I ch_vt
-is nonzero, resource usage data for the child are reported
-as by
-.IR vtimes (2).
-.PP
-If the parent process terminates without
-waiting on its children,
-they are inherited by
-process 1
-(the initialization process, 
-.IR init (8)).
-.SH "SEE ALSO"
-.IR fork (2), 
-.IR exit (3),
-.IR signal (2), 
-.IR sh (1)
-.SH DIAGNOSTICS
-.IR wait ,
-.IR wait3 :
-.B ECHILD
-.SH BUGS
-If the argument to
-.I wait
-is bogus, the user program gets a memory fault rather than an
-.BR EFAULT .
-.br
-The 0 third argument to
-.I wait3
-is a required historical dreg.