Hi All,
I am searching for IP address pattern in some files which I want to replace with some characters. However when I replace the IP numbers, it also replaces other characters beyond the IP address like below-
125.29.234.18.23456->SSS.SS.SSS.SS.SSSSS
In the above example it should not replace the 23456 with the new characters. It should be-
125.29.234.18.23456->SSS.SS.SSS.SS.23456
this thing I am doing with awk in ksh. I don't know how to specify word boundary for this IP address so that only 4 numbers separated by 3 dots which form the the IP address should be replaced with the characters.
Hi Don,
yes, I dnt want to replace the last number coming after the 4 numbers forming the IP address. So the replacement should consider only the first 4 numbers forming the IP and should replace it, not the number coming beyond it. So the replacement should be like this-
ip1 -> 10.145.234.176.45645-> SS.SSS.SSS.SSS.45645
ip2-> 125.15.234.9.3456->SSS.SS.SSS.S.3456
hope you understand my point.
thanks for your reply
is not an IP address. It might be two IP addresses separated by "->" although I have never seen IP addresses that contained letters instead of digits.
Show us you input (using CODE tags) and state what it is. (I.e., Is it stored in a shell variable? Is it a line in an input file? Is it something else?)
Then show us the output you are trying to produce using CODE tags. Make positive statements like: I want to change x to y. Stating a negative (I don't want to replace the last number.) doesn't really help if we don't know what you do want to do.
It may also help if you tell us what shell and OS you're using.
I want to replace only the IP address 10.108.231.140 to some letter/character. If you see this pattern 10.108.231.140.33099 which represents some_ip.port_no. I want to replace only the IP address leaving the port no unchanged.
Below sample code replaces all ip with port no pattern without considering the exact IP address pattern.
Code:
for str in ${ip_arr[@]}
do
#here str contains the exact ip, say 10.108.231.140
/usr/xpg4/bin/awk '{ for (i=1; i<=NF; i++) if ($i ~ /'str'/) gsub(/[[:digit:]]/, "S", $i) }1' netstat-an.out
done
So can you please tell me how to get output like below-
As you see, only the IP address is replaced with a Letter. I want this as the desired result.
This I am doing on Solaris using ksh and awk. So I can't use perl for this, because I want this in korn script only.
thanks for your valuable replies.
#!/usr/xpg4/bin/sh
/usr/xpg4/bin/awk '
# repDigits(1, split1, n1, m) or
# repDigits(2, split2, n2, m) reconstituutes the field specified by the 1st
# argument with data from the array specifeid by the 2nd argument containing
# the # of elements specified by the 3rd argument. The digits in the 1st 4
# elements of splitN will be replaced by the same number of alphabetic
# characters: if both fields are being replaced, digits are replaced with "f";
# if only field 1 is being replaced, digits are replaced with "g"; and if only
# field 2 is being replaced, digits are replaced with "h".
function repDigits(field, fieldData, fieldCount, repIndex, i) {
$field = sprintf("%.*s.%.*s.%.*s.%.*s",
length(fieldData[1]), rep[repIndex],
length(fieldData[2]), rep[repIndex],
length(fieldData[3]), rep[repIndex],
length(fieldData[4]), rep[repIndex])
for(i = 5; i <= fieldCount; i++)
$field = $field "." fieldData[i]
}
BEGIN { # Initialize replaceemnt strings for digits in IP addresses
rep[1] = "gggggggggg" # 1st field only
rep[2] = "hhhhhhhhhh" # 2nd field only
rep[3] = "ffffffffff" # both fields
}
NF == 7 {
# Split the first two fields on this line into the arrays split1[] and
# split2[] using a period as the field separator and then verify that
# each array has at least four elements and that the 1st four elements
# of each is numeric. The variable m is then set as follows:
# 0=>neither field meets the criteria
# 1=>the 1st field meets the criteria, but the 2nd argument does not
# 2=>the 2nd field meets the criteria, but the 1st argument does not
# 3=>both arguments meet the criteria
m = 0
n1 = split($1, split1, /[.]/)
if(n1 >= 4 && split1[1] ~ /^[0-9]+$/ &&
split1[2] ~ /^[0-9]+$/ &&
split1[3] ~ /^[0-9]+$/ &&
split1[4] ~ /^[0-9]+$/) m = 1
n2 = split($2, split2, /[.]/)
if(n2 >= 4 && split2[1] ~ /^[0-9]+$/ &&
split2[2] ~ /^[0-9]+$/ &&
split2[3] ~ /^[0-9]+$/ &&
split2[4] ~ /^[0-9]+$/) m += 2
if(m % 2) repDigits(1, split1, n1, m)
if(m >= 2) repDigits(2, split2, n2, m)
}
1 # print the (possibly updated) line' input
Note that on Solaris systems, /usr/xpg[46]/bin/sh are Korn shells, but there is nothing in this script that requires Korn shell extensions Any shell that accepts basic Bourne shell syntax will be fine for this script.
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Word boundary with awk in ksh