This. People using bash extensions and util-linux as if they're standard are my bane. If you can't do it in POSIX (sh and utilities) and don't want to do an ex

This. People using bash extensions and util-linux as if they're standard are my bane. If you can't do it in POSIX (sh and utilities) and don't want to do an extensive investigation of portability for what you need, pony up for Python/Tcl/Perl (all in MacOS base, by the way).