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I have list of files which contain particular patterns, but those files have been tarred. Now I want to search for the pattern in the tar file, and to know which files contain the pattern without extracting the files.
Any idea...?
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On the other side, the grep command has the –label=LABEL option to display LABEL as the filename. It's pretty useful when we grep on Stdin. Therefore, to solve the problem, we can assemble a command like tar … –to-command='grep …' and pass tar's TAR_FILENAME variable to grep's –label option. It works!
Use -t switch with tar command to list content of a archive. tar file without actually extracting. You can see that output is pretty similar to the result of ls -l command.
You need to use zgrep command which invokes grep on compressed or gzipped files. All options specified are passed directly to the grep command or egrep command.
zgrep states it works the same as grep, but can handle zipped files. zgrep "hello" * however returns 1 even though the pattern was found in test1. it returns 1 because the pattern was not found in test2. turns out if any file does not match the pattern, 1 is returned, even if all other files do match the pattern.
the tar command has a -O switch to extract your files to standard output. So you can pipe those output to grep/awk
tar xvf test.tar -O | awk '/pattern/{print}' tar xvf test.tar -O | grep "pattern" eg to return file name one pattern found
tar tf myarchive.tar | while read -r FILE do if tar xf test.tar $FILE -O | grep "pattern" ;then echo "found pattern in : $FILE" fi done If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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