Shell Programming and Scripting

Hi guys
I am using the following command to "grep" a pattern and 22 lines after it from the file:

Code:

$ nawk '/\[435\]/{c=22}c&&c--' allocations.ini

It does the job fine if the pattern is hardcoded into the command, if the case above it is [435].
But when I am trying to assign a variable instead of hardcoded pattern the command returns nothing
$ PNUM=435
$ nawk -v a=$PNUM '/\[a\]/{c=22}c&&c--' allocations.ini
$
I am not sure what I am doing wrong here.
Thanks a lot for any advice....

Code:

nawk -v a=$PNUM '$0 ~ ("[" a "]") {c=22}c&&c--' allocations.ini

Thanks, but now it lists all file instead of the block I request.

what pattern you're searching for?
Either 4 or 3 or 5? A string '435'?
If the latter:

Code:

PNUM=435
nawk -v a=$PNUM '$0 ~ a{c=22}c&&c--' allocations.ini

Or something else?

I am searching for the string "[435]", but for some reason the above commands return a lot more (almost the whole file) then I am searching for... If "[435]" is hardcoded like in the first example the output is correct.

Ah, ok:

Code:

PNUM=435

nawk -v a="${PNUM}" '$0 ~ ("\\[" a "\\]") {c=22}c&&c--' allocations.ini