ksh IP地址模式

Question

Trying to match $1 to see if it's an IP address in ksh.

if [ $1 = "^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$" ]

doesn't seem to be identifying the following

ksh -x samp.sh 192.168.128.10

Answer 1

Try

"[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}"

Ksh only has a subset of regex .

Answer 2

I used the following regular expression evaluation in KSH93 and it worked for me.

if [[ $1 == {1,3}(\d).{1,3}(\d).{1,3}(\d).{1,3}(\d) ]]
then
# regex expression evaluated to true
<< perform some action here .... >>
else
# regex expression evaluated to false
<< perform some action here .... >>
fi