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32 .\" @(#)exit.3 8.1 (Berkeley) 6/4/93
40 .Nd perform normal program termination
48 .Fn _Exit "int status"
54 functions terminate a process.
58 performs the following functions in the order listed:
59 .Bl -enum -offset indent
61 Call all functions registered with the
64 (which are typically destructors from the loaded dynamic objects),
65 and the functions registered with the
67 function, in the reverse order of their registration.
69 Flush all open output streams.
71 Close all open streams.
76 function terminates without calling the functions registered with the
78 function, and may or may not perform the other actions listed.
83 function does not call destructors registered with
85 does not flush buffers, and does not close streams.
87 Both functions make the low-order eight bits of the
89 argument available to a parent process which has called a
100 as possible values of
102 Cooperating processes may use other values;
103 in a program which might be called by a mail transfer agent, the
106 may be used to provide more information to the parent process.
110 does nothing to prevent bottomless recursion should a function registered
115 Such functions must call
117 instead (although this has other effects as well which may not be desired).
129 .Xr at_quick_exit 3 ,