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 0

       Exit with a false value:

              exit 1

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

       Special Built-In Utilities

COPYRIGHT

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition,
       Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open  Group  Base
       Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics Engineers,
       Inc  and  The  Open Group. 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.opengroup.org/unix/online.html .

IEEE/The Open Group                                   2003                                               EXIT(P)