NAME    [Toc]    [Back]

     exit, _Exit - perform normal program termination

SYNOPSIS    [Toc]    [Back]

     #include <stdlib.h>

     void
     exit(int status);

     void
     _Exit(int status);

DESCRIPTION    [Toc]    [Back]

     The exit() and _Exit() functions terminate a process.

     Before termination, exit() performs the following operations
in the order
     listed:

           1.    Call the functions registered with the atexit(3)
function, in
                the reverse order of their registration.

           2.   Flush all open output streams.

           3.   Close all open streams.

           4.   Unlink all  files  created  with  the  tmpfile(3)
function.

     The  _Exit()  function  terminates without calling the functions registered
     with the atexit(3) function.  The OpenBSD implementation  of
_Exit() does
     not  flush  open output streams or unlink files created with
the tmpfile(3)
     function.  However, this behavior is  implementation-specific.

     Lastly,  exit()  and _Exit() call _exit(2).  Note that typically _exit(2)
     only passes the lower 8 bits of status  on  to  the  parent,
thus negative
     values have less meaning.

RETURN VALUES    [Toc]    [Back]

     The exit() and _Exit() functions never return.

SEE ALSO    [Toc]    [Back]

     _exit(2), atexit(3), intro(3), sysexits(3), tmpfile(3)

STANDARDS    [Toc]    [Back]

     The  exit()  and  _Exit()  functions conform to ANSI/ISO/IEC
9899-1999
     (``ANSI C99'').

OpenBSD     3.6                        January      21,      2004