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    Command:

    _Exit

    
    
    

    SYNOPSIS

           #include <unistd.h>
    
           void _exit(int status);
    
           #include <stdlib.h>
    
           void _Exit(int status);
    
       Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
    
           _Exit():
               _XOPEN_SOURCE >= 600 || _ISOC99_SOURCE ||
               _POSIX_C_SOURCE >= 200112L;
               or cc -std=c99
    
    
    

    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 par-
           ent 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(2)  family  of
           calls.
    
           The function _Exit() is equivalent to _exit().
    
    
    

    RETURN VALUE

           These functions do not return.
    
    
    

    CONFORMING TO

           SVr4,  POSIX.1-2001,  4.3BSD.   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, and so on, see exit(3).
    
           The  function  _exit() is like exit(3), but does not call any functions
           registered with atexit(3) or on_exit(3).  Whether it  flushes  standard
           I/O  buffers  and  removes  temporary  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(3) before calling _exit().  Whether any
           pending I/O is canceled, and which pending I/O  may  be  canceled  upon
           _exit(), is implementation-dependent.
    
           In  glibc  up  to version 2.3, the _exit() wrapper function invoked the
           kernel system call of the same name.   Since  glibc  2.3,  the  wrapper
           function  invokes  exit_group(2),  in  order  to  terminate  all of the
    
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