Hi All,

I am trying to find non-printable characters in a string. The sting could have alphanumeric, puntuations and characters like (*&%$#.') but not non-printable (or that is what I think they are called) which are introduced when you copy any text from DOS to unix box.

Input string1:

Code:

 TEXT="This is a sample text with supposedly non-printable character^Y."

Input string2:

Code:

TEXT="This is a sample text with supposedly non-printable character"

I've got a code from the website for bash but still this is not working.

Code:

if ! [[ "$TEXT" =~ ^[a-zA-Z0-9]+$ ]];then echo "invalid"; fi

Note: I've removed the dot also "." from "Input string2" just to check if the command works or not.

This prints "invalid" in both the cases?! Also is there any equivalent command that works in KSH? Please suggest.

-dips