At 11:43 AM 10/29/2003 -0600, Andrew Gaffney wrote:
Rick Bragg wrote:Hi,
I want to write a script that will test the contents of a file.
The file being tested will pass only if it contains nothing more than an ip address on one line. Does anyone have a sample of a simple regex to accomplish this?
/\d+\.\d+\.\d+\.\d+\n?/s
Slightly more complex and slightly more robust:
cat <<EOF | perl -lne "print if /^(\d{1,3}\.){3}\d{1,3}$/"
hello
1.2.3.4.5
1.2.3
1.2.3.4
1.2.3.4 hello
hello 1.2.3.4
123.123.123.123
1234.123.123.123
EOFRegards, - Robert
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