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Shell Programming and Scripting

using sed to get IP-address

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Top Forums Shell Programming and Scripting using sed to get IP-address
# 8  
Old 10-17-2008
So do you have both styles? Any other variations?
MrC
# 9  
Old 10-17-2008
Code:
cat data4
$node="node_ip:109.50.89.211; node:j20"
$node="node:j21; node_ip:109.50.89.211"

$ cat data4 | perl -pe 's/^.*?:(\d{1,3}(\.\d{1,3}){3}).*$/$1/'
109.50.89.211
109.50.89.211

MrC
# 10  
Old 10-17-2008
Quote:
Originally Posted by MrC
Code:
cat data4
$node="node_ip:109.50.89.211; node:j20"
$node="node:j21; node_ip:109.50.89.211"

$ cat data4 | perl -pe 's/^.*?:(\d{1,3}(\.\d{1,3}){3}).*$/$1/'
109.50.89.211
109.50.89.211



Yes! Thank you very much, works perfectly.
# 11  
Old 10-17-2008
If you are using bash or ksh93 you can use the builtin extended regular expression capability to get the IP address without calling an external utility.

For example here is an example of how to extract the address from the two sample node strings using ksh93
Code:
TMP=file.$$

cat <<EOF > $TMP
node_ip:109.50.89.211; node:j20
node:j21; node_ip:109.50.89.211
EOF

while read str
do
     echo ${str/*([[:print:]]):+({1,3}([[:digit:]]){3}(\.{1,3}([[:digit:]])))*([[:print:]])/\2}
done < $TMP

rm $TMP
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