Quote:
Originally Posted by pixellany
I thought homework also, but the posting history says maybe not.
If it is homework, how about a trick question? My favorite--in chemistry class: What is this compound? BaNa2 (subscript 2)
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Believe that I've read man pages but parentheses and angle brackets are tricky characters
There is no tricks or homework. The only trick here is that It's my fault for I haven't documented my own scripts that has the function that I use for parsing radius logs:
Code:
Incorrect(){
#I don't want to match with some other kind of Incorrect Access
awk '$9 ~ /incorrect/ && $10 ~ /([^[(<]])/ { print tolower($10) }'
}
Really parentheses are not needed here. So we have:
[^[(<]]
So this match on whatever be on 10th field that has parentheses or angle brackets...
I prevent so that entries like:
[<no
(rlm_ldap:
are included int the output
I was confused because I was playing with:
Code:
awk '$9 ~ /incorrect/ && $10 ~ /([[(<]])/ { print tolower($10) }' logfile
and it outputs nothing, but even so the expression above works fine,
So I've just remembered and I am documenting what I wanted to do
:
Let's suppose we have a file "q" with:
[<xxxxx ]
(
[saralnadasd]
We want match only '[saralnadasd]'
If I use
Code:
awk '$1 ~ /[^(<]/ {print $1}' q
I get:
[<xxx
(xxxx
[saralnadasd]
that is not what we are looking for.
If I use
Code:
awk '$1 ~ /^[(<]/ {print $1}' q
(xxxx
Of course because "^" out of squared brackets means beginning of the line. That is not we want again
It works if we use:
Code:
awk '$1 ~ /[^[(<]]/ {print $1}' q
[saralnadasd]
I was confused because removing "^" from the regex is not the right way to get the reverse thing (yes, yes I know that I can use "!~ in awk, but was trying to remember what I did), the correct reverse regex is:
Code:
awk '$1 ~ /[(<]/ {print $1}' q
[<xxx
(xxxx
I'd hope that my somewhat confuse explanation be useful to someone
but isn't that the chemical formula for synthetic bananas (patented by MS to feed those millions of monkeys we discussed earlier)?
