GNU bug report logs - #23073
wc reports wrong byte counts when using '--from-files0=-'

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From: "William R. Fraser" <wfraser <at> codewise.org>
To: 23073 <at> debbugs.gnu.org
Subject: bug#23073: wc reports wrong byte counts when using '--from-files0=-'
Date: Sun, 20 Mar 2016 17:59:57 -0700 (PDT)

[Message part 1 (text/plain, inline)]

When wc gets its list of files by reading from stdin, using the argument 
'--from-files0=-', it reuses the same fstatus struct for each file.

The problem is that the 'wc' function checks the 'failed' member of this 
struct and if it is <=0, it skips doing fstat on the file. The main loop 
doesn't reset this value between files, so only the first file has fstat 
done on it.

This can result in the 'wc' function seeking past the end of 
subsequent files and then over-reporting their byte counts.

See the attached patch, which resets the fstatus struct in between files 
when reading the file list from stdin.

Thanks,
- Bill Fraser

[0001-wc-fix-wrong-byte-counts-when-using-files-from0.patch (text/plain, attachment)]

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