SYNOPSIS  
  1) user_string:string(addr:long) 
  
 2) user_string:string(addr:long,err_msg:string) 
 
  ARGUMENTS  
   addr  
 the user space address to retrieve the string from 
  err_msg  
 the error message to return when data isn't
  available 
 
  DESCRIPTION  
  1) Returns the null terminated C string from a given user space
    memory address. Reports an error on the rare cases when userspace data is
    not accessible. 
 2) Returns the null terminated C string from a given user space
    memory address. Reports the given error message on the rare cases when
    userspace data is not accessible. 
 
  SEE
  ALSO0  
    tapset::uconversions (3stap)