On Wed, Oct 14, 2015 at 08:22:37AM -0500, Eric Sandeen wrote:
> Per the Advanced Bash Scripting Guide:
> 
> "The -n test requires that the string be quoted within the test brackets.
> Using an unquoted string with ! -z, or even just the unquoted string
> alone within test bracket normally works, however, this is an unsafe
> practice. Always quote a tested string."
> 
> And indeed:
> 
> $ unset FOOBAR
> $ [ -n $FOOBAR ] || echo nope
> $ [ -n "$FOOBAR" ] || echo nope
> nope
> 
> Ran into this on a box w/o the attr program installed, and passed
> _require_attrs.  Quoting the string fixes this; fix it there
> and other occurrences in common/* as well.
> 
> Signed-off-by: Eric Sandeen <[email protected]>
> Reviewed-by: Alex Elder <[email protected]>

A quick search shows that all strings after "[ -n " are quoted after
applying this patch.

Reviewed-by: Eryu Guan <[email protected]>
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