Hi Christopher
Here's what it says in the dhcp-eval man page
substring (data-expr, offset, length)
The substring operator evaluates the data expression and
returns the substring of the result of that evaluation
that starts offset bytes from the beginning, continuing
for length bytes. Offset and length are both numeric
expressions. If data-expr, offset or length evaluate to
null, then the result is also null. If offset is greater
than or equal to the length of the evaluated data, then a
zero-length data string is returned. If length is greater
then the remaining length of the evaluated data after
offset, then a data string containing all data from offset
to the end of the evaluated data is returned.
So just make length be a number bigger than your string is ever likely to
be, eg 1000, or 10,000, or 1,000,000 say.
regards,
-glenn
On Sat, September 2, 2017 12:03 am, Christopher Barry wrote:
>
> Hello everyone,
>
> I want to use the substring keyword to return a part of a string that
> starts at character 5, and goes to the end of the string. The strings
> will be of variable length. Do I simply omit the second numeric
> parameter to accomplish that? I can't find anything about this in the
> man pages.
>
> Thanks
>
> --
> Regards,
> Christopher
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