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

NAME
       function::userstringnwarn - Retrieves string from user space

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

       2) userstringnwarn:string(addr:long,n:long,warnmsg:string)

ARGUMENTS
       addr
           the user space address to retrieve the string from

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

       warnmsg
           the warning message to return when data isn't available

DESCRIPTION
       1) Returns up to n characters of a C string from a given user space
       memory address. Reports“” on the rare cases when userspace
       data is not accessible and warns (but does not abort) about the
       failure.

       2) Returns up to n characters of a C string from a given user space
       memory address. Reports the given warning message on the rare cases
       when userspace data is not accessible and warns (but does not abort)
       about the failure.

SEE ALSO
       tapset::uconversions(3stap)



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