_Exit

_EXIT(2)		  Linux Programmer’s Manual		     _EXIT(2)



NAME
       _exit, _Exit - terminate the current process

SYNOPSIS
       #include <unistd.h>

       void _exit(int status);

       #include <stdlib.h>

       void _Exit(int status);

DESCRIPTION
       The  function  _exit terminates the calling process "immediately". Any
       open file descriptors belonging to the process are closed;  any	chil-
       dren  of	 the  process  are inherited by process 1, init, and the pro-
       cess’s parent is sent a SIGCHLD signal.

       The value status is returned to the parent process  as  the  process’s
       exit  status,  and  can	be  collected using one of the wait family of
       calls.

       The function _Exit is equivalent to _exit.

RETURN VALUE
       These functions do not return.

CONFORMING TO
       SVr4, SVID, POSIX, X/OPEN, BSD 4.3.  The function _Exit()  was  intro-
       duced by C99.

NOTES
       For  a  discussion on the effects of an exit, the transmission of exit
       status, zombie processes, signals sent, etc., see exit(3).

       The function _exit is like exit(), but does  not	 call  any  functions
       registered  with the ANSI C atexit function, nor any registered signal
       handlers. Whether it flushes standard I/O buffers and  removes  tempo-
       rary  files  created  with tmpfile(3) is implementation-dependent.  On
       the other hand, _exit does close open file descriptors, and  this  may
       cause  an  unknown delay, waiting for pending output to finish. If the
       delay is undesired, it may be useful to call functions like  tcflush()
       before  calling	_exit().   Whether  any pending I/O is cancelled, and
       which pending I/O may be cancelled upon	_exit(),  is  implementation-
       dependent.

SEE ALSO
       fork(2),	 execve(2),  waitpid(2), wait4(2), kill(2), wait(2), exit(3),
       termios(3)



Linux				  2001-11-17			     _EXIT(2)