Uncompress and pipe the output to script

Question

I have a script that takes an input with a -i flag. The input file I have is compressed (.gz). What I want to do (not sure it's possible), because the file is huge, do some thing like this:

gunzip -c myfile.gz | myScript.pl -i STDIN -o myoutfile.txt

So pipe the output of the decompression to my scripts input flag.

that command I wrote doesn't work, I want something that will — crysis405, Feb 10 '14 at 00:55
well you have a space between `my` and `script`. If you used `-o` first and then `-i` it would work (remove the `STDIN`) — Seth, Feb 10 '14 at 00:57
sorry about the space, that should not be there. The script is now giving me an error that I haven't provided an input. Does this have to be specifically specified in the perl script, if you want to do piping like this? — crysis405, Feb 10 '14 at 00:59

score 33 · Accepted Answer · answered Feb 10 '14 at 15:46

33

I found the solution:

gunzip -c myfile.gz | myScript.pl -o myoutfile.txt -i -

it was the - after -i that did the trick.

answered Feb 10 '14 at 15:46

crysis405

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To other readers, `-c` is for "to stdout" – mpen Feb 14 '20 at 03:11
I used the -k switch as well, to stop gunzip deleting the original file. – Paul Rooney Aug 17 '22 at 04:57

Uncompress and pipe the output to script

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