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diff --git a/man-pages-posix-2017/man1p/unalias.1p b/man-pages-posix-2017/man1p/unalias.1p new file mode 100644 index 0000000..fdb0069 --- /dev/null +++ b/man-pages-posix-2017/man1p/unalias.1p @@ -0,0 +1,152 @@ +'\" et +.TH UNALIAS "1P" 2017 "IEEE/The Open Group" "POSIX Programmer's Manual" +.\" +.SH 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. +.\" +.SH NAME +unalias +\(em remove alias definitions +.SH SYNOPSIS +.LP +.nf +unalias \fIalias-name\fR... +.P +unalias -a +.fi +.SH DESCRIPTION +The +.IR unalias +utility shall remove the definition for each alias name specified. See +.IR "Section 2.3.1" ", " "Alias Substitution". +The aliases shall be removed from the current shell execution +environment; see +.IR "Section 2.12" ", " "Shell Execution Environment". +.SH OPTIONS +The +.IR unalias +utility shall conform to the Base Definitions volume of POSIX.1\(hy2017, +.IR "Section 12.2" ", " "Utility Syntax Guidelines". +.P +The following option shall be supported: +.IP "\fB\-a\fP" 10 +Remove all alias definitions from the current shell execution +environment. +.SH OPERANDS +The following operand shall be supported: +.IP "\fIalias-name\fR" 10 +The name of an alias to be removed. +.SH STDIN +Not used. +.SH "INPUT FILES" +None. +.SH "ENVIRONMENT VARIABLES" +The following environment variables shall affect the execution of +.IR unalias : +.IP "\fILANG\fP" 10 +Provide a default value for the internationalization variables that are +unset or null. (See the Base Definitions volume of POSIX.1\(hy2017, +.IR "Section 8.2" ", " "Internationalization Variables" +for the precedence of internationalization variables used to determine +the values of locale categories.) +.IP "\fILC_ALL\fP" 10 +If set to a non-empty string value, override the values of all the +other internationalization variables. +.IP "\fILC_CTYPE\fP" 10 +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). +.IP "\fILC_MESSAGES\fP" 10 +.br +Determine the locale that should be used to affect the format and +contents of diagnostic messages written to standard error. +.IP "\fINLSPATH\fP" 10 +Determine the location of message catalogs for the processing of +.IR LC_MESSAGES . +.SH "ASYNCHRONOUS EVENTS" +Default. +.SH STDOUT +Not used. +.SH STDERR +The standard error shall be used only for diagnostic messages. +.SH "OUTPUT FILES" +None. +.SH "EXTENDED DESCRIPTION" +None. +.SH "EXIT STATUS" +The following exit values shall be returned: +.IP "\00" 6 +Successful completion. +.IP >0 6 +One of the +.IR alias-name +operands specified did not represent a valid alias definition, or an +error occurred. +.SH "CONSEQUENCES OF ERRORS" +Default. +.LP +.IR "The following sections are informative." +.SH "APPLICATION USAGE" +Since +.IR unalias +affects the current shell execution environment, it is generally +provided as a shell regular built-in. +.SH EXAMPLES +None. +.SH RATIONALE +The +.IR unalias +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\(hy2017, such as command line editing. +.P +The +.BR \-a +option is the equivalent of the +.IR unalias +* 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 +.IR ENV +file. (Although +.IR unalias +could be used to simplify the ``secure'' shell script shown in the +.IR command +rationale, it does not obviate the need to quote all command names. An +initial call to +.IR unalias +.BR \-a +would have to be quoted in case there was an alias for +.IR unalias .) +.SH "FUTURE DIRECTIONS" +None. +.SH "SEE ALSO" +.IR "Chapter 2" ", " "Shell Command Language", +.IR "\fIalias\fR\^" +.P +The Base Definitions volume of POSIX.1\(hy2017, +.IR "Chapter 8" ", " "Environment Variables", +.IR "Section 12.2" ", " "Utility Syntax Guidelines" +.\" +.SH COPYRIGHT +Portions of this text are reprinted and reproduced in electronic form +from IEEE Std 1003.1-2017, Standard for Information Technology +-- Portable Operating System Interface (POSIX), The Open Group Base +Specifications Issue 7, 2018 Edition, +Copyright (C) 2018 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 . +.PP +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 . |