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On 1/21/19 6:50 PM, Adam Carter wrote: |
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> I need to clean up a file which has IP addresses with leading zeros in |
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> some of the octets so I need to make, say, .09 into .9 |
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> |
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> How do i do that in sed/awk/whatever? |
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The first thing you should do is construct a bunch of test cases, with |
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all of the possible input representations and what you think the output |
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representation should be. Then, you should write a program in something |
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other than bash that passes all of the test cases. It's not as easy as |
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it sounds; for example: |
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|
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* What happens to 0.1.2.3? |
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|
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* What happens to 01.2.3.4? |
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|
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* What happens to 1.2.3.0? |
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|
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* What happens to 1.2.000.3? |
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You need a parser, not a regular expression. (You can do it with a |
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regex, but it's going to be one of those comical twelve-page-long things.) |
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