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RedHat 9 (Linux i386) - man page for exit (redhat section 2)

_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 children of the process are inherited by  process
       1, init, and the process'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 introduced by C99.

NOTES
       For a discussion on the effects of an exit, the transmission of exit status,  zombie  pro-
       cesses, 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 temporary files created with tmpfile(3) is implementation-depen-
       dent.  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)


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