EXIT(1P) POSIX Programmer's Manual EXIT(1P)PROLOG
This manual page is part of the POSIX Programmer's Manual. The Linux
implementation of this interface may differ (consult the corresponding
Linux manual page for details of Linux behavior), or the interface may
not be implemented on Linux.
exit — cause the shell to exit
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
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.
See the DESCRIPTION.
The standard error shall be used only for diagnostic messages.
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
CONSEQUENCES OF ERRORS
The following sections are informative.
Exit with a true value:
Exit with a false value:
As explained in other sections, certain exit status values have been
reserved for special uses and should be used by applications only for
126 A file to be executed was found, but it was not an executable
127 A utility to be executed was not found.
>128 A command was interrupted by a signal.
Section 2.14, Special Built-In Utilities
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 Electri‐
cal 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 .
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IEEE/The Open Group 2013 EXIT(1P)