All of lore.kernel.org
 help / color / mirror / Atom feed
From: Andreas Engel <Andreas.Engel@marconi.com>
To: u-boot@lists.denx.de
Subject: [U-Boot-Users] test variable existence in hush
Date: Mon, 22 Aug 2005 12:57:58 +0200	[thread overview]
Message-ID: <20050822125758.00001da8@idefix> (raw)

Hi,

can anyone confirm that this is a bug in the hush shell: both

 test -n "$foo" && echo yes

and

 test -z "$foo" && echo yes

result in nothing echoed if foo is not defined. If, on the other hand,
foo is defined to a string containing blanks, both commands will echo
yes.

Is there another way to check the existence of a variable?

Regards,
  Andreas Engel 

             reply	other threads:[~2005-08-22 10:57 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-08-22 10:57 Andreas Engel [this message]
2005-08-22 12:21 ` [U-Boot-Users] test variable existence in hush Wolfgang Denk
2005-08-22 13:01   ` Andreas Engel

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=20050822125758.00001da8@idefix \
    --to=andreas.engel@marconi.com \
    --cc=u-boot@lists.denx.de \
    /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.