_exit - phpMan

_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
       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 temporary files created with tmpfile(3) is imple-
       mentation-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  call-
       ing  _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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