nawk with multiple files

[uksnowman]

Hi,

Is it possible to use one script to perform a different nawk processing sequence depending on the input file?
In order to use only one script to process several files with different formats.

For example, I cut the first 4 colums out of a log file, either a.txt or b.txt depending on which file is used then use nawk to parse the log.

#! /bin/sh

{
if (inputfile = a.txt)
cut -d" " -f1,2,3,4 a.txt
else
cut -d" " -f1,2,3,4 b.txt
fi
} | nawk '


BEGIN { (some pre-processing) }


if (inputfile = a.txt)
process1()
else if (inputfile = b.txt)
process2()

process1()
{
print hello
}

process2()
{
print goodbye
}

END { (some post-processing) }'


Any help will be great,

Thanks,
uksnowman

 

[Krunek]

Hello, uksnowman!

You can use FILENAME built-in variable to perform a different awk processing depending on the input file.

Please, try this awk idea:

FILENAME == "a.txt" { print "a", $0 }

FILENAME == "b.txt" { print " b", $0 }


Bye!

KP.