Tab separated values in awk
Use:
awk -v FS='\t' -v OFS='\t' ...
Example from one of my scripts.
I use the FS
and OFS
variables to manipulate BIND zone files, which are tab delimited:
awk -v FS='\t' -v OFS='\t' \
-v record_type=$record_type \
-v hostname=$hostname \
-v ip_address=$ip_address '
$1==hostname && $3==record_type {$4=ip_address}
{print}
' $zone_file > $temp
This is a clean and easy to read way to do this.
You need to set the OFS
variable (output field separator) to be a tab:
echo "$line" |
awk -v var="$mycol_new" -F'\t' 'BEGIN {OFS = FS} {$3 = var; print}'
(make sure you quote the $line
variable in the echo statement)
Make sure they're really tabs! In bash, you can insert a tab using C-v TAB
$ echo "LOAD_SETTLED LOAD_INIT 2011-01-13 03:50:01" | awk -F$'\t' '{print $1}'
LOAD_SETTLED