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diff --git a/man-pages-posix-2003/man1p/export.1p b/man-pages-posix-2003/man1p/export.1p new file mode 100644 index 0000000..ee04566 --- /dev/null +++ b/man-pages-posix-2003/man1p/export.1p @@ -0,0 +1,165 @@ +.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved +.TH "EXPORT" 1P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual" +.\" export +.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 +export \- set the export attribute for variables +.SH SYNOPSIS +.LP +\fBexport name\fP\fB[\fP\fB=\fP\fIword\fP\fB]\fP\fB... +.br +.sp +export -p +.br +\fP +.SH DESCRIPTION +.LP +The shell shall give the \fIexport\fP attribute to the variables corresponding +to the specified \fIname\fPs, which shall cause +them to be in the environment of subsequently executed commands. If +the name of a variable is followed by = \fIword\fP, then the +value of that variable shall be set to \fIword\fP. +.LP +The \fIexport\fP special built-in shall support the Base Definitions +volume of IEEE\ Std\ 1003.1-2001, Section 12.2, Utility Syntax Guidelines. +.LP +When \fB-p\fP is specified, \fIexport\fP shall write to the standard +output the names and values of all exported variables, in +the following format: +.sp +.RS +.nf + +\fB"export %s=%s\\n", <\fP\fIname\fP\fB>, <\fP\fIvalue\fP\fB> +\fP +.fi +.RE +.LP +if \fIname\fP is set, and: +.sp +.RS +.nf + +\fB"export %s\\n", <\fP\fIname\fP\fB> +\fP +.fi +.RE +.LP +if \fIname\fP is unset. +.LP +The shell shall format the output, including the proper use of quoting, +so that it is suitable for reinput to the shell as +commands that achieve the same exporting results, except: +.IP " 1." 4 +Read-only variables with values cannot be reset. +.LP +.IP " 2." 4 +Variables that were unset at the time they were output need not be +reset to the unset state if a value is assigned to the +variable between the time the state was saved and the time at which +the saved output is reinput to the shell. +.LP +.LP +When no arguments are given, the results are unspecified. +.SH OPTIONS +.LP +See the DESCRIPTION. +.SH OPERANDS +.LP +See the DESCRIPTION. +.SH STDIN +.LP +Not used. +.SH INPUT FILES +.LP +None. +.SH ENVIRONMENT VARIABLES +.LP +None. +.SH ASYNCHRONOUS EVENTS +.LP +Default. +.SH STDOUT +.LP +See the DESCRIPTION. +.SH STDERR +.LP +The standard error shall be used only for diagnostic messages. +.SH OUTPUT FILES +.LP +None. +.SH EXTENDED DESCRIPTION +.LP +None. +.SH EXIT STATUS +.LP +Zero. +.SH CONSEQUENCES OF ERRORS +.LP +Default. +.LP +\fIThe following sections are informative.\fP +.SH APPLICATION USAGE +.LP +None. +.SH EXAMPLES +.LP +Export \fIPWD\fP and \fIHOME\fP variables: +.sp +.RS +.nf + +\fBexport PWD HOME +\fP +.fi +.RE +.LP +Set and export the \fIPATH\fP variable: +.sp +.RS +.nf + +\fBexport PATH=/local/bin:$PATH +\fP +.fi +.RE +.LP +Save and restore all exported variables: +.sp +.RS +.nf + +\fBexport -p >\fP \fItemp-file\fP\fBunset\fP \fIa lot of variables\fP\fB...\fP \fIprocessing\fP\fB.\fP \fItemp-file\fP +.fi +.RE +.SH RATIONALE +.LP +Some historical shells use the no-argument case as the functional +equivalent of what is required here with \fB-p\fP. This +feature was left unspecified because it is not historical practice +in all shells, and some scripts may rely on the now-unspecified +results on their implementations. Attempts to specify the \fB-p\fP +output as the default case were unsuccessful in achieving +consensus. The \fB-p\fP option was added to allow portable access +to the values that can be saved and then later restored using; +for example, a \fIdot\fP script. +.SH FUTURE DIRECTIONS +.LP +None. +.SH SEE ALSO +.LP +\fISpecial Built-In Utilities\fP +.SH 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 . |