Date: Mon, 12 Jan 2009 14:16:58 -0500 (EST) From: vogelke+unix@pobox.com (Karl Vogel) To: freebsd-questions@freebsd.org Subject: Re: bash versus sh test builtin Message-ID: <20090112191700.03CFFBE56@kev.msw.wpafb.af.mil> In-Reply-To: <7740275E-77AA-45C1-B95E-C1F62D2AAB29@goldmark.org> (message from Jeffrey Goldberg on Sun, 11 Jan 2009 20:08:18 -0600)
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>> On Sun, 11 Jan 2009 20:08:18 -0600,
>> Jeffrey Goldberg <jeffrey@goldmark.org> said:
J> if [ $UID -ne 0 ] ; then ...
J> Does anyone have a recommendation of how to run this simple test in /bin/sh
J> and how to write tests reasonably portably?
I think your best bet for comparisons like this is to use case. I started
doing that back in the days when '[' would start a separate program:
case "$UID" in
0) echo am root ;;
*) echo not root ;;
esac
I use "test" for things relating to file access:
die() {
echo "$@" >& 2
exit 1
}
test -f /etc/passwd || die "Your system is seriously hosed"
--
Karl Vogel I don't speak for the USAF or my company
If men ruled the world #12: Instead of wasting money on an expensive
engagement ring, your fiancee would get a giant foam hand that said,
"You're #1!"
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