GNU bug report logs - #16444
grep -r fails with "Bad file descriptor" for mingw-w64

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Message #30 received at 16444 <at> debbugs.gnu.org (full text, mbox):

From: Paul Eggert <eggert <at> cs.ucla.edu>
To: Norihiro Tanaka <noritnk <at> kcn.ne.jp>, 
 David Grayson <davidegrayson <at> gmail.com>
Cc: 16444 <at> debbugs.gnu.org
Subject: Re: bug#16444: bug #16444: grep -r fails with "Bad file descriptor"
 for mingw-w64
Date: 2015年3月11日 23:15:12 -0700

Norihiro Tanaka wrote:
> MinGW always returns ST_INO = 0, which is POSIX incompatible.
Yes, this is a known deficiency in MinGW that is documented in Gnulib, here:
http://www.gnu.org/software/gnulib/manual/html_node/sys_002fstat_002eh.html
(search for "st_ino").
When we discovered this deficiency years ago, we decided that it'd be too much 
of a pain to work around it then. Please see the thread starting here:
http://lists.gnu.org/archive/html/bug-gnulib/2009-09/msg00252.html
in which a patch was installed that tries to work around some of the MinGW 
deficiency; unfortunately the patch broke a lot of things and was backed out. 
I'm not optimistic about a fix this time either.
The deficiency should be fixed in MinGW, so that functions like 'stat' behave as 
programs expect. In the meantime, I suggest not using recursive grep in MinGW.

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