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From: Paul Smith <paul@mad-scientist.net>
To: Andrey Voropaev <voropaev.andrey@gmail.com>, dash@vger.kernel.org
Subject: Re: Tests [ 0 -eq $UID ] don't work as in bash
Date: Wed, 07 Sep 2016 11:55:00 -0400	[thread overview]
Message-ID: <1473263700.7265.3.camel@mad-scientist.net> (raw)
In-Reply-To: <CAFOXTdceLsR_xBcs=B2QajQHW_UJyBKTr6R8fQvUNCxikYn77w@mail.gmail.com>

On Wed, 2016-09-07 at 16:44 +0200, Andrey Voropaev wrote:
> if [ 0 -eq $UID ]

The variable UID is not defined to be automatically set by the shell in
POSIX; having it set is a bash extension.  dash doesn't set it
automatically for you.

You'll have to set it yourself:

  UID=$(id -u)

Also you should quote variable references, in general:

  if [ 0 -eq "$UID" ]

Be sure that if your scripts rely on bash-isms you start them with
#!/bin/bash and if you don't want them to rely on bash-isms, you start
them with #!/bin/sh.

  reply	other threads:[~2016-09-07 16:23 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-09-07 14:44 Andrey Voropaev
2016-09-07 15:55 ` Paul Smith [this message]
2016-09-07 20:02   ` Stephane Chazelas

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