exit Post: 302070628

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LEARN ABOUT LINUX

exit

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

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 Technol-
       ogy -- 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)

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Where can I find a list of exit codes? (Exit code 64)

Discussion started by: jkuchar747

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exit(0) versus exit(1)

Discussion started by: enuenu

3. Shell Programming and Scripting

exit 2

Discussion started by: xramm

4. UNIX for Dummies Questions & Answers

what is meaning of exit(0) and exit(1)

Discussion started by: amitpansuria