GNU bug report logs - #9574
data-loss with --batch: ignored write failure

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Package: emacs;

Reported by: Jim Meyering <jim <at> meyering.net>

Date: Thu, 22 Sep 2011 14:40:02 UTC

Severity: minor

Tags: patch

Done: Paul Eggert <eggert <at> cs.ucla.edu>

Bug is archived. No further changes may be made.

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From: Jim Meyering <jim <at> meyering.net>
To: 9574 <at> debbugs.gnu.org
Subject: bug#9574: data-loss with --batch: ignored write failure
Date: Thu, 22 Sep 2011 16:39:04 +0200

This should diagnose the write failure and exit nonzero:

    emacs --version > /dev/full

Currently (latest from bzr trunk as of yesterday),
emacs exits 0 (successfully) and gives no diagnostic.
Obviously that doesn't matter too much, but this next one
can easily cause real trouble:

    $ emacs --batch --eval '(print "important")' > /dev/full && echo FAIL
    FAIL

I.e., the write fails and emacs fails to report that failure.

That means anything written via --batch to standard output may
be corrupted or incomplete, and emacs will still exit successfully.
This bug report was last modified 12 years and 202 days ago.

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