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While doing some further testing, I came up with a few questions. If you had the following input file:
1.2.3.4.5.6.7.8.9.10.11.12.13.14.15.16.17.18.19.20.21.22.23.24.25.26.27.28
11.22.33.44version...

No need to feel guilty I have a feeling I'm much better at solving problems than explaining what I mean, my wife says I the most left-brained person she knows.

On your RegEx performance testing.
...

I apologize for taking so long to get back to you. But when I have a choice between spending some time with the grandkids or evaluating an awk script; the grandkids are going to win every time. :)...

The code ipUnique[ip] = ip; and ipUnique[ip]; are not equivalent.

The first creates array element ip with a null value (if it doesn't already exist) and then assigns it's value to ip.

The...

Actually, interval expressions for awk are part of POSIX (at least since SUS v3):
9.4.6 EREs Matching Multiple Characters...

I didn't notice when you slipped in local in your variable definitions; local isn't in the POSIX standards. (A proposal to add local to a future revision of the POSIX standards is being discussed. ...

Hi gencon and Chubler_XL,
I agree that Chubler_XL is taking the better approach. There is no need to fire up both sed and awk. You just need to fix the gsub() that is accidentally deleting all...

No, that is an attempt to remove the need for the sed replace call it is supposed to match slash + ipRegEx + slash.
Perhaps it would be clearer if we replaced it with something like...

Perhaps you could get some more portability out of an awk script (you could also test the 0-255 limit on the octets with this awk script if you liked):

local ipLikeAddressMatches=$(awk '
BEGIN {...

I'm over it. No intensive therapy required.

Note that I clearly stated that my suggestion had a limitation because I knew it didn't work with one of your sample lines of input. (It seemed to...

If you every did have a ip and ip-like addresses sed could just blank out the ip-like ones in this manor:

skipIpExpr1="[/][0-9]+\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]+[/]"...

I can't see what's going wrong. Did you try alternation of [^/] with the begin-of-line (^)?

Hi,
Or, if your grep have -P option, you can reduct one regex:
$ cat file
a) "11.11.11.11" --> This should match "11.11.11.11"
b) "lots12.11.11.11lots" --> This should match...

As long as you don't have input lines that contain both an ip address and an ip-like address between slash characters, the following seems to do what you want:...

Hi gencon,
I'm glad it helped.

It is a personal preference. In the shell, the meaning of (pattern) and pattern) is exactly the same. I prefer the (pattern) form because I use the vi editor...

Hi gencon,
As Corona688 said, the getopts utility is used to parse command line options. When the getopts loop finishes, you should shift off the arguments that it processed and the remaining...

How is it supposed to tell the difference between a missing -, and a filename named 'x' that the user wants to enter? What if the user really does want to enter a file named x? It can't, its...

Glad it helps :)

Note: FS="**" only works in some awks, where it may happen to mean "zero or more asterisks" .

However, this is not defined behaviour..



So it would be best to either...

The input field separator in awk needs to be specified before the first line. It is also probably a good idea to remove the special meaning of the asterisks. Try:
awk -F' ' '{printf ....

It might be that there is some special character involved? Have you tried using grep -F?

Otherwise, could you provide a sample of what goes wrong?

Use [^[:ascii:]] instead!
To match a space or a non-breaking space, try [^[:graph:]].

LANG sets locale, and has an impact on character sets like [a-z] or [[:print:]].

$ cat data

This line contains a 1 but is not a mistake
The small brown fox jumped over the lazy dog.
This line contains a 1 but is a m1stake
How are you today?
mi|k
That's fine; this isn't....

Explanation of the error.
Your "tr" command strips out all line terminators (\n) for some unknown reason and converts them to "+" signs. My version of "sed" will not process lines without a line...

how about:
getip test | grep -o "^[0-9.]*" | tr "\n\r\f" "+" | sed 's/+$/&0/' | bc