I am doing this with below command but not satisfied, I know there is better way to do this but need right direction.
I doubt that you are doing it with the script you posted; there are errors in that script. When posting code, use the exact code. Cut and paste it, do not retype it.
Quote:
Code:
for line in $(cat zonefile );
That is almost always the wrong way to read a file.
You are not reading it a line at a time, but a word at a time.
Use a while loop:
Code:
while IFS= read -r line
do
: ...
done < zonefile
Quote:
Code:
do
name = $(echo $line | cut -d' ' -f1)
IP = $(echo $line | cut -d. -f4)
There must be no spaces around the equals signs.
You do not need an external command to split a line. Use the shell's parameter expansion or IFS and set:
Code:
name=${line%% *}
set -f; IFS=.; set -- $line
shift $(( $# - 1 ))
IP=$4
There's usually not much reason to use cut when the read builtin can handle delimiters more elegantly. Here it takes two delimiters, period and space, to split the string into words and individual numbers at the same time. It also checks when the first three change and prints out the address entire, as your output data suggests you want.
Code:
IFS=" ."
while read NAME G A B C D && [[ ! -z "$NAME" ]]
do
if [[ "$A" != "$AA" ]] ||
[[ "$B" != "$BB" ]] ||
[[ "$C" != "$CC" ]]
then
echo "$A.$B.$C.$D"
fi
AA="$A" ; BB="$B" ; CC="$C" ; DD="$D"
echo -e "$D\tPTR\t$NAME.domain.com"
done < zonefile
I doubt that you are doing it with the script you posted; there are errors in that script. When posting code, use the exact code. Cut and paste it, do not retype it.
I was looking for right direction and you gave it me... thank you!
Quote:
Originally Posted by Corona688
There's usually not much reason to use cut when the read builtin can handle delimiters more elegantly. Here it takes two delimiters, period and space, to split the string into words and individual numbers at the same time. It also checks when the first three change and prints out the address entire, as your output data suggests you want.
don't look like they imply that the last 40 is substituted by the first field in subsequent lines.
At any rate -- here's my ksh solution (late)
Code:
prev_key=some-junk
cat << EOF |
subdomain1 A 10.20.30.40
subdomain2 A 10.20.31.41
subdomain3 A 10.20.35.43
subdomain4 A 10.20.30.41
subdomain5 A 10.20.30.42
EOF
#----------------------------------------------------------------------#
# Convert spaces to dots. #
#----------------------------------------------------------------------#
sed -e's/ /./g' |
#----------------------------------------------------------------------#
# Delimit on dots... reformat so that the key is in front... #
#----------------------------------------------------------------------#
awk -F. '{
printf( "%s.%s.%s %s %s\n", $3, $4, $5, $6, $1 );
}' |
while read key subnet domain; do
if [[ $key != $prev_key ]]; then
print $key
prev_key=$key
fi
print $subnet PTR $domain.domain.com
done
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