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Full Discussion: Use while loop to read file and use ${file} for both filename input into awk and as string to print
Top Forums Shell Programming and Scripting Use while loop to read file and use ${file} for both filename input into awk and as string to print Post 302997575 by Don Cragun on Tuesday 16th of May 2017 05:44:52 PM
Old 05-16-2017
You're close, but shell variables aren't known in an awk script unless you explicitly pass them in. And, in awk $var prints the field named by the field number contained in the awk variable var (and since var hasn't been defined in your awk script it expanded to $0 which is the contents of the current line). Try:
Code:
while read file
do	awk -F'\t' -v var="$file" '/K02588/ {print var,$1,$2; exit}' "${file}_ko.txt" > "${file}_nifh.txt"
done < prefixes.txt

This User Gave Thanks to Don Cragun For This Post:
pathunkathunk
 

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LEARN ABOUT DEBIAN

vm

VM(1)								      mgetty								     VM(1)

NAME

       vm - VoiceModem is the program for handling the voice modem functionality from shell scripts

ACTIONS

       beep options [<frequency [<length in 0.001sec>]]>
       diagnostics options device name (e.g. ttyS2
       dial options phone number
       help
       play options [<file names]+>
       record options file name
       shell options [<shell script [shell options]]>
       wait  options [<time in seconds]>
       devicetest

OPTIONS

       -c n use compression type n
       -d n set i/o device
       -t, -m, -i, -e, -s, -H equals to -d <2,3,4,5,6,7>
       -l s set device string (e.g. -l ttyS2:ttyC0)
       -v verbose output
       -w use off / on hook signal from local handset to start and stop recording
       -x n set debug level
       -L n set maximum recording length in sec
       -P print first DTMF tone on stdout and exit
       -R read and print DTMF string on stdout and exit
       -S s set default shell for shell scripts (e.g. -S /bin/sh)
       -T n set silence timeout in 0.1sec
       -V n set silence threshold to <n> (0-100%%)

SEE ALSO

       vgetty(1)

POD ERRORS

       Hey! The above document had some coding errors, which are explained below:

       Around line 30:
	   You forgot a '=back' before '=head1'

       Around line 32:
	   '=item' outside of any '=over'

       Around line 71:
	   You forgot a '=back' before '=head1'

perl v5.10.1							    2010-04-04								     VM(1)
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