The script assumes that it is run from the root of the source tree,
which is where it is located. So this should be enforced to prevent
accidental misuses.
realpath is used instead of readlink as that is recommended in Debian's
readlink manpage since at least Debian 11. Also, use the shell variable's
parameter expansion for removing a suffix pattern to get the directory
in which the script resides. This is preferable to using the dirname binary
as it avoids creating a new process.
Signed-off-by: Glenn Washburn <development@efficientek.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
