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]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4CC70013.2090004@cbnco.com \
--to=msmith@cbnco.com \
--cc=openembedded-devel@lists.openembedded.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.