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[BUG] false positive: [ ! -o optname ]
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From: |
Martijn Dekker |
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Subject: |
[BUG] false positive: [ ! -o optname ] |
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Date: |
Sun, 25 Sep 2016 22:32:04 +0100 |
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User-agent: |
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:45.0) Gecko/20100101 Thunderbird/45.2.0 |
The '!' operator in the legacy test/[ builtin does not invert the result
of the -o operator. Consequently the command
[ ! -o noclobber ]
amounts to a no-op, always returning exit status 0.
Proof:
$ set -o noclobber && [ -o noclobber ] && [ ! -o noclobber ] && echo bug
bug
Interestingly, mksh has this bug as well, though not the original pdksh.
Thanks,
- M.
- [BUG] false positive: [ ! -o optname ],
Martijn Dekker <=