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Full Discussion: How to assign values to variable in given scenario
Top Forums UNIX for Dummies Questions & Answers How to assign values to variable in given scenario Post 302644109 by gary_w on Monday 21st of May 2012 10:13:49 AM
Old 05-21-2012
You didn't say what shell you are using, but in bash you can use indirect variable referencing like this:
Code:
$ cat x
#!/bin/bash

DIR="f1 f2"
LFILE=DIR

LISTFILES=${!LFILE}

echo $LISTFILES

exit 0

$ x
f1 f2
$

P.S. Back to your original example, if your shell does not support the above, you can do it using eval as long as you are sure of what you are eval'ing as eval can be dangerous.
eval forces the shell to evaluate the line twice. First (in this example), it does variable expansion so
"eval LISTFLES=\$$LFILE" is replaced with "LISTFILES=$DIR", THEN the shell executes the line.
Code:
$ cat x
#!/bin/ksh

DIR="f1 f2"
LFILE=DIR

eval LISTFILES=\$$LFILE

print $LISTFILES

exit 0
$ x
f1 f2
$

Last edited by gary_w; 05-21-2012 at 11:35 AM..
 

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LEARN ABOUT DEBIAN

go-path

GO-PATH(7)						 Miscellaneous Information Manual						GO-PATH(7)

NAME

       go - tool for managing Go source code

DESCRIPTION

       The Go path is used to resolve import statements.  It is implemented by and documented in the go/build package.

       The  GOPATH  environment variable lists places to look for Go code.  On Unix, the value is a colon-separated string.  On Windows, the value
       is a semicolon-separated string.  On Plan 9, the value is a list.

       GOPATH must be set to build and install packages outside the standard Go tree.

       Each directory listed in GOPATH must have a prescribed structure:

       The src/ directory holds source code.  The path below 'src' determines the import path or executable name.

       The pkg/ directory holds installed package objects.  As in the Go tree, each target operating system and architecture pair has its own sub-
       directory of pkg (pkg/GOOS_GOARCH).

       If DIR is a directory listed in the GOPATH, a package with source in DIR/src/foo/bar can be imported as "foo/bar" and has its compiled form
       installed to "DIR/pkg/GOOS_GOARCH/foo/bar.a".

       The bin/ directory holds compiled commands.  Each command is named for its source directory, but only the final	element,  not  the  entire
       path.   That is, the command with source in DIR/src/foo/quux is installed into DIR/bin/quux, not DIR/bin/foo/quux.  The foo/ is stripped so
       that you can add DIR/bin to your PATH to get at the installed commands.	If the GOBIN environment variable is set, commands  are  installed
       to the directory it names instead of DIR/bin.

       Here's an example directory layout:

	   GOPATH=/home/user/gocode

	   /home/user/gocode/
	       src/
		   foo/
		       bar/		  (go code in package bar)
			   x.go
		       quux/		  (go code in package main)
			   y.go
	       bin/
		   quux 		  (installed command)
	       pkg/
		   linux_amd64/
		       foo/
			   bar.a	  (installed package object)

       Go  searches  each  directory  listed in GOPATH to find source code, but new packages are always downloaded into the first directory in the
       list.

AUTHOR

       This manual page was written by Michael Stapelberg <stapelberg@debian.org>, for the Debian project (and may be used by others).

								    2012-05-13								GO-PATH(7)
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