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