EXIT(1)                    POSIX Programmer's Manual                   EXIT(1)



PROLOG
       This manual page is part of the POSIX Programmer's Manual.  The OS
       implementation of this interface may differ (consult the corresponding
       OS manual page for details of OS behavior), or the interface may not be
       implemented on OS.


NAME
       exit -- cause the shell to exit

SYNOPSIS
       exit [[_n]]

DESCRIPTION
       The exit utility shall cause the shell to exit with the exit status
       specified by the unsigned decimal integer _n.  If _n is specified, but
       its value is not between 0 and 255 inclusively, the exit status is
       undefined.

       A trap on EXIT shall be executed before the shell terminates, except
       when the exit utility is invoked in that trap itself, in which case the
       shell shall exit immediately.

OPTIONS
       None.

OPERANDS
       See the DESCRIPTION.

STDIN
       Not used.

INPUT FILES
       None.

ENVIRONMENT VARIABLES
       None.

ASYNCHRONOUS EVENTS
       Default.

STDOUT
       Not used.

STDERR
       The standard error shall be used only for diagnostic messages.

OUTPUT FILES
       None.

EXTENDED DESCRIPTION
       None.

EXIT STATUS
       The exit status shall be _n, if specified. Otherwise, the value shall be
       the exit value of the last command executed, or zero if no command was
       executed. When exit is executed in a trap action, the last command is
       considered to be the command that executed immediately preceding the
       trap action.

CONSEQUENCES OF ERRORS
       Default.

       The following sections are informative.

APPLICATION USAGE
       None.

EXAMPLES
       Exit with a true value:

           exit 00

       Exit with a false value:

           exit 11

RATIONALE
       As explained in other sections, certain exit status values have been
       reserved for special uses and should be used by applications only for
       those purposes:

        126    A file to be executed was found, but it was not an executable
               utility.

        127    A utility to be executed was not found.

       >128    A command was interrupted by a signal.

FUTURE DIRECTIONS
       None.

SEE ALSO
       Section 2.14, Special Built-In Utilities

COPYRIGHT
       Portions of this text are reprinted and reproduced in electronic form
       from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
       -- Portable Operating System Interface (POSIX), The Open Group Base
       Specifications Issue 7, Copyright (C) 2013 by the Institute of
       Electrical and Electronics Engineers, Inc and The Open Group.  (This is
       POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) In the
       event of any discrepancy between this version and the original IEEE and
       The Open Group Standard, the original IEEE and The Open Group Standard
       is the referee document. The original Standard can be obtained online
       at http://www.unix.org/online.html .

       Any typographical or formatting errors that appear in this page are
       most likely to have been introduced during the conversion of the source
       files to man page format. To report such errors, see
       https://www.kernel.org/doc/man-pages/reporting_bugs.html .



IEEE/The Open Group                  2013                              EXIT(1)
