From: Michael Smith <msmith@cbnco.com>
To: openembedded-devel@lists.openembedded.org
Subject: Re: Use of == in shell scripts
Date: Tue, 26 Oct 2010 12:21:39 -0400 [thread overview]
Message-ID: <4CC70013.2090004@cbnco.com> (raw)
In-Reply-To: <4CC6FDB2.6050401@opendreambox.org>
Andreas Oberritter wrote:
> On 10/26/2010 05:51 PM, Maupin, Chase wrote:
> I understand that bash is a requirement for now, but if possible, that
> should be changed. I don't think that root access to a machine should be
> necessary to build OE on Ubuntu (or maybe even on BSD flavors).
Well, maybe Ubuntu should be changed to use bash :)
>> If I remember correctly in bash "==" will also work with numbers whereas "=" is only for strings.
>
> Both bash and dash on my system handle "[ "0" = 0 ]" or [ "0" = 1 ]
> correctly. Another operator "-eq" exists, which is only for numbers.
From what I can see, it looks like = and == are equivalent in bash, so
we should use = so we're not tied to bash.
-eq is for numeric comparison. For example, [ 01 -eq 1 ] but not
[ "01" = "1" ].
Mike
prev parent reply other threads:[~2010-10-26 16:22 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-26 15:31 Use of == in shell scripts Andreas Oberritter
2010-10-26 15:47 ` Andreas Oberritter
2010-10-26 16:29 ` Michael Smith
2010-10-26 23:36 ` Andreas Oberritter
2010-10-27 1:47 ` Mike Detwiler
2010-11-13 16:10 ` Andreas Oberritter
2010-11-14 23:40 ` Michael Smith
2010-10-26 15:51 ` Maupin, Chase
2010-10-26 16:03 ` Chris Larson
2010-10-26 16:11 ` Andreas Oberritter
2010-10-26 16:21 ` Michael Smith [this message]
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