Section: POSIX Programmer's Manual (1P)
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.
--- remove alias definitions
utility shall remove the definition for each alias name specified. See
, Alias Substitution.
The aliases shall be removed from the current shell execution
, Shell Execution Environment.
utility shall conform to the Base Definitions volume of POSIX.1-2008,
, Utility Syntax Guidelines.
The following option shall be supported:
Remove all alias definitions from the current shell execution
The following operand shall be supported:
The name of an alias to be removed.
The following environment variables shall affect the execution of
Provide a default value for the internationalization variables that are
unset or null. (See the Base Definitions volume of POSIX.1-2008,
Section 8.2, Internationalization Variables
for the precedence of internationalization variables used to determine
the values of locale categories.)
If set to a non-empty string value, override the values of all the
other internationalization variables.
Determine the locale for the interpretation of sequences of bytes of
text data as characters (for example, single-byte as opposed to
multi-byte characters in arguments).
Determine the locale that should be used to affect the format and
contents of diagnostic messages written to standard error.
Determine the location of message catalogs for the processing of
The standard error shall be used only for diagnostic messages.
The following exit values shall be returned:
One of the
operands specified did not represent a valid alias definition, or an
CONSEQUENCES OF ERRORS
The following sections are informative.
affects the current shell execution environment, it is generally
provided as a shell regular built-in.
description is based on that from historical KornShell implementations.
Known differences exist between that and the C shell. The KornShell
version was adopted to be consistent with all the other KornShell
features in this volume of POSIX.1-2008, such as command line editing.
option is the equivalent of the
* form of the C shell and is provided to address security concerns
about unknown aliases entering the environment of a user (or
application) through the allowable implementation-defined predefined
alias route or as a result of an
could be used to simplify the ``secure'' shell script shown in the
rationale, it does not obviate the need to quote all command names. An
initial call to
would have to be quoted in case there was an alias for
, Shell Command Language,
The Base Definitions volume of POSIX.1-2008,
Chapter 8, Environment Variables,
Section 12.2, Utility Syntax Guidelines
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
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