47 lines
1 KiB
Markdown
47 lines
1 KiB
Markdown
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isHidden: false
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menupriority: 1
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kind: article
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created_at: 2010-02-18T15:29:14+02:00
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title: split a file by keyword
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tags:
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- awk
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- shell
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- script
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-----
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Strangely enough, I didn't find any built-in tool to split a file by keyword. I made one myself in `awk`. I put it here mostly for myself. But it could also helps someone else.
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The following code split a file for each line containing the word `UTC`.
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<div><code class="perl">
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#!/usr/bin/env awk
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BEGIN{i=0;}
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/UTC/ {
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i+=1;
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FIC=sprintf("fic.%03d",i);
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}
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{print $0>>FIC}
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</code></div>
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In my real world example, I wanted one file per day, each line containing UTC being in the following format:
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<pre class="twilight">
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Mon Dec 7 10:32:30 UTC 2009
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</pre>
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I then finished with the following code:
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<div><code class="perl">
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#!/usr/bin/env awk
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BEGIN{i=0;}
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/UTC/ {
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date=$1$2$3;
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if ( date != olddate ) {
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olddate=date;
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i+=1;
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FIC=sprintf("fic.%03d",i);
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}
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}
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{print $0>>FIC}
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</code></div>
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