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I have a file that is a parsed together from several other files. Each line has a unique identifier that establishes which file it came from:

data data UID data ...

So, for each of these UID's...

I am having issues escaping special characters in my AWK script as follows:

for id in `cat file`
do
grep $id in file2 | awk '\
BEGIN {var=""} \
{ if ( /stringwith+'|'+'50'chars/ ) {
...