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Re: [Grep-devel] grep-2.27 released [stable]
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From: |
Paul Eggert |
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Subject: |
Re: [Grep-devel] grep-2.27 released [stable] |
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Date: |
Wed, 7 Dec 2016 12:22:31 -0800 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.5.1 |
On 12/07/2016 09:26 AM, Dmitry V. Levin wrote:
it probably means that
yes | grep --quiet . || echo yes or grep failed
will never terminate.
Actually, that terminates too, as grep 2.27 keeps reading only if you
don't specify -q, -l, -L, -m0, -f /dev/null, etc. -- basically, any
option that a naive and unportable script is so unlikely to use that
it's OK to optimize. I installed the attached patch to NEWS to try to
clarify this. The 2nd patch is a minor simplification of the relevant code.
0001-maint-clarify-early-exit-news-for-2.27.patch
Description: Source code patch
0002-grep-simplify-finalize_input.patch
Description: Source code patch