curpsinfo->pr_psargs more then 80 characters

Hello.
Does anybody know how to obtain a full command with all arguments when 
use a

curpsinfo->pr_psargs

?
Documentation says: psinfo_t provider features pr_psargs field that 
contains first 80 characters of process arguments.

So, is there any analog of "curpsinfo->pr_psargs" which doesn't cut to 
80 characters?

PS. I use it in dtrace script 
https://github.com/jorgev/dtrace-scripts/blob/master/execsnoop