When trying to run makexpi.sh on my OS X machine, trivial_validate fails. Here is the output: """ bash-3.2$ ./makexpi.sh -- Rules not anchored to beginning of a line: (None.) -- Rules with unescaped dots outside of brackets and left of a slash: (None.) -- Rules with backslashes in to pattern: (None.) -- Rules not containing trailing slash in from pattern: (None.) -- Rules not containing trailing slash in to pattern: (None.) -- Rules with missing closing slash in rule XML tag: (None.) -- Rules with multiple wildcards in a single target rule: (None.) -- Rules with targets containing URLs/paths instead of hostnames: (None.) -- Rules redirecting to http in to pattern: (None.) -- Rules containing space before to pattern: (None.) -- Rules with syntactically invalid regular expressions: BYU.xml HSBC.xml University-of-North-Texas.xml -- Rules with syntatically invalid XML: (None.) -- Rules containing non-ASCII characters (possible homoglyph attacks): (None.) --- Rules that lack at least one valid <target> tag: (None.) --- Duplicated ruleset names: (None.) --- Duplicated target hosts: *.facebook.com *.google.com facebook.com google.* google.co.* google.com google.com.* www.google.* www.google.co.* www.google.com www.google.com.* (not exiting) ERROR: Validation of rulesets failed. """ I understand this works on Linux, and might relate to different bash semantics. It seems using trivial_validate.py would fix this problem.