Linux Shell Programming: Pocket Primer by Oswald Campesato

Author:Oswald Campesato
Language: eng
Format: epub
Publisher: Mercury Learning and Information

Searching zip Files for a String

There are at least three ways to search for a string in one or more zip files. As an example, suppose that you want to determine which zip files contain SVG documents.

The first way is shown here:

for f in `ls *zip` do echo "Searching $f" jar tvf $f |grep "svg$" done

When there are many zip files in a directory, the output of the preceding loop can be verbose, in which case you need to scroll backward and probably copy/paste the names of the files that actually contain SVG documents into a separate file. A better solution is to put the preceding loop in a shell and redirect its output. For instance, create the file findsvg.sh whose contents are the preceding loop, and then invoke this command:

./findsvg.sh 1>1 2>2

Notice that the preceding command redirects error message (2>) to the file 2 and the results of the jar/grep command (1>) to the file 1.

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