Date: Mon, 10 Jun 2013 14:45:46 -0700 From: <dteske@freebsd.org> To: "'jb'" <jb.1234abcd@gmail.com>, <freebsd-questions@freebsd.org> Cc: Devin Teske <dteske@freebsd.org> Subject: RE: Bourne shell "if" syntax Message-ID: <124a01ce6623$de03c2c0$9a0b4840$@freebsd.org> In-Reply-To: <loom.20130610T214814-692@post.gmane.org> References: <51b620a6.42f.2b6a6400.5605dcf0@go2france.com> <121701ce660c$9a9aa5b0$cfcff110$@freebsd.org> <51B62389.5000500@tundraware.com> <121b01ce660e$2abae5f0$8030b1d0$@freebsd.org> <51B62622.1070201@tundraware.com> <CAHu1Y70FNX8G2ARF5zBzRbu5iMsXVkUCouBk-YruY3xH1gWsqg@mail.gmail.com> <loom.20130610T214814-692@post.gmane.org>
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> -----Original Message----- > From: owner-freebsd-questions@freebsd.org [mailto:owner-freebsd- > questions@freebsd.org] On Behalf Of jb > Sent: Monday, June 10, 2013 12:53 PM > To: freebsd-questions@freebsd.org > Subject: Re: Bourne shell "if" syntax > > Michael Sierchio <kudzu <at> tenebras.com> writes: > > > ... > > Right. Many scripts seem to assume that sh is bash, and that's > > certainly not the case here. > > > > if [ "x$BLAH" = "x" ]; then > > > > is the most reliable and portable way of determining if it's a string > > of zero length. > > Actually this trick is not needed any more (it has not been required for > long time because the problem was fixed). > http://mail.openjdk.java.net/pipermail/hotspot-runtime-dev/2012- > August/004275.html > The above link reinforces what I mentioned earlier as the divide. Differs based on whether "[" is a built-in versus /usr/bin/[ -- Devin _____________ The information contained in this message is proprietary and/or confidential. If you are not the intended recipient, please: (i) delete the message and all copies; (ii) do not disclose, distribute or use the message in any manner; and (iii) notify the sender immediately. In addition, please be aware that any message addressed to our domain is subject to archiving and review by persons other than the intended recipient. Thank you.
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