awk

hello

i'm writing a bash script and i want to use a command and filter it with awk,I do the following:

Code:

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last | grep -v "wtmp" | awk '{print $3}'

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but i want awk to print column 3 only if column 1 (which is the username) matches the variable $usr
Is there a way to do this comparison in awk?

thanks

A couple of ways...

Code:

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$ last | grep -v "wtmp" | awk -v u=$USER '$1==u {print $3}'
$ last | grep -v "wtmp" | awk  '$1==ENVIRON["USER"] {print $3}'

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Quote:

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Originally Posted by Salem

A couple of ways...

Code:

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$ last | grep -v "wtmp" | awk -v u=$USER '$1==u {print $3}'
$ last | grep -v "wtmp" | awk  '$1==ENVIRON["USER"] {print $3}'

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thanks a lot!

You should be able to get rid of the grep invocation something like this

Code:

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$ last | awk -v u=$usr '!/wtmp/ && $1==u {print $3}'

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I don't know what column "wtmp" occurs in, but if it's in the user name column and $usr is not "wtmp", then just

Code:

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$ last | awk -v u=$usr '$1==u {print $3}'

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