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QA /technical/2008/04/expand-glob-in-variable-within-shell-script/

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Wesley Moore 2010-03-15 08:01:04 +11:00
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content/technical/2008/04/expand-glob-in-variable-within-shell-script.html
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I had the need today to read in a list of patterns from a file, expand them and then operate upon each file all from within a shell script. Apparently there is a <a href="http://docs.sun.com/app/docs/doc/816-0210/6m6nb7mas?a=view">shell built-in for csh</a>, but I didn't want to learn csh at that point. The eventual solution was to run an extra shell with the -c argument. I had the need today to read in a list of patterns from a file, expand them and then operate upon each file all from within a shell script. Apparently there is a <a href="http://docs.sun.com/app/docs/doc/816-0210/6m6nb7mas?a=view">shell built-in for csh</a>, but I didn't want to learn csh at that point. The eventual solution was to run an extra shell with the -c argument.
Example: Example:
<pre>#!/bin/bash #!/bin/bash
FILES=`cat patterns.txt` FILES=`cat patterns.txt`
for pattern in $FILES; do for pattern in $FILES; do
bash -c "ls -l ${pattern}" bash -c "ls -l ${pattern}"
done</pre> done