The GETPXLOCALE function
returns the POSIX locale value for a valid SAS locale name. If
you specify an invalid locale name, then a null string is returned.
If you do not specify a value for the
<source> argument, then the function returns the POSIX name for the current
SAS session. The length of the POSIX locale name is five characters.
If the size of the variable that receives the value is less than five
characters, the value is truncated.