FUNCTION::USERSTRIN(3stString and data retrieving FUNCTION::USERSTRIN(3stap)

NAME
       function::userstringn - Retrieves string of given length from user
       space

SYNOPSIS
       1) userstringn:string(addr:long,n:long)

       2) userstringn:string(addr:long,n:long,errmsg:string)

ARGUMENTS
       addr
           the user space address to retrieve the string from

       n
           the maximum length of the string (if not null terminated)

       errmsg
           the error message to return when data isn't available

DESCRIPTION
       1) Returns the C string of a maximum given length from a given user
       space address. Reports an error on the rare cases when userspace data
       is not accessible at the given address.

       2) Returns the C string of a maximum given length from a given user
       space address. Returns the given error message string on the rare cases
       when userspace data is not accessible at the given address.

SEE ALSO
       tapset::uconversions(3stap)



SystemTap Tapset Reference         June 2018       FUNCTION::USERSTRIN(3stap)