If XCMD is in effect,
you can issue operating environment commands through any of the available
SAS interfaces, including the X command or the X statement; TSO command,
statement, function, or CALL routine; SYSTEM function or CALL routine;
%TSO macro; or %SYSEXEC macro.
If NOXCMD is in effect,
then all of the above interfaces are disabled. In addition, the following
interfaces are disabled:
-
PIPE and NAMEPIPE device types
in the FILENAME statement
-