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Full Discussion: Positional Parameters Arguments/Variables when using dot (.)
Top Forums UNIX for Beginners Questions & Answers Positional Parameters Arguments/Variables when using dot (.) Post 303039558 by wisecracker on Wednesday 9th of October 2019 09:59:46 AM
Old 10-09-2019
I am at a loss as to what you are trying to do.
IF you are sourcing a file, . /path/to/file then that will execute inside the parent shell.
Variables will be passed at that position where the sourced file is...
A quick demo...
Sourced file:
Code:
#!/bin/sh
# Test file to be sourced.

MYVAR=$1

echo "Inside source file \${MYVAR} = ${MYVAR}"

AND parent file:
Code:
#!/bin/sh
# Parent test file...

# Sourced file in the same directory.
. ./source_file.sh 'UNIX'

echo "Sourced file \${MYVAR} = ${MYVAR}"

MYVAR="Bazza"

echo "Parent file \${MYVAR} = ${MYVAR}"

. ./source_file.sh 'LINUX'

echo "Sourced file \${MYVAR} = ${MYVAR}"

Results OSX 10.14.6, default shell terminal.
Code:
Last login: Wed Oct  9 14:38:32 on ttys000
AMIGA:amiga~> cd Desktop/Code/Shell
AMIGA:amiga~/Desktop/Code/Shell> chmod 755 parent_file.sh
AMIGA:amiga~/Desktop/Code/Shell> chmod 755 source_file.sh
AMIGA:amiga~/Desktop/Code/Shell> ./parent_file.sh
Inside source file ${MYVAR} = UNIX
Sourced file ${MYVAR} = UNIX
Parent file ${MYVAR} = Bazza
Inside source file ${MYVAR} = LINUX
Sourced file ${MYVAR} = LINUX
AMIGA:amiga~/Desktop/Code/Shell> _

 

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LEARN ABOUT DEBIAN

cpanplus::shell

CPANPLUS::Shell(3perl)					 Perl Programmers Reference Guide				    CPANPLUS::Shell(3perl)

NAME

       CPANPLUS::Shell - base class for CPANPLUS shells

SYNOPSIS

	   use CPANPLUS::Shell; 	    # load the shell indicated by your
					    # config -- defaults to
					    # CPANPLUS::Shell::Default

	   use CPANPLUS::Shell qw[Classic]  # load CPANPLUS::Shell::Classic;

	   my $ui      = CPANPLUS::Shell->new();
	   my $name    = $ui->which;	    # Find out what shell you loaded

	   $ui->shell;			    # run the ui shell

DESCRIPTION

       This module is the generic loading (and base class) for all "CPANPLUS" shells. Through this module you can load any installed "CPANPLUS"
       shell.

       Just about all the functionality is provided by the shell that you have loaded, and not by this class (which merely functions as a generic
       loading class), so please consult the documentation of your shell of choice.

BUG REPORTS

       Please report bugs or other issues to <bug-cpanplus@rt.cpan.org<gt>.

AUTHOR

       This module by Jos Boumans <kane@cpan.org>.

COPYRIGHT

       The CPAN++ interface (of which this module is a part of) is copyright (c) 2001 - 2007, Jos Boumans <kane@cpan.org>. All rights reserved.

       This library is free software; you may redistribute and/or modify it under the same terms as Perl itself.

SEE ALSO

       CPANPLUS::Shell::Default, CPANPLUS::Shell::Classic, cpanp

perl v5.14.2							    2014-09-29						    CPANPLUS::Shell(3perl)
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