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Re: builtin echo command redirection misbehaves in detached scripts when


From: Stephane Chazelas
Subject: Re: builtin echo command redirection misbehaves in detached scripts when terminal is closed
Date: Sun, 9 Sep 2007 22:18:07 +0100
User-agent: Mutt/1.5.16 (2007-06-11)

On Sun, Sep 09, 2007 at 10:08:14PM +0200, Andreas Schwab wrote:
> Stephane Chazelas <address@hidden> writes:
> 
> > On Sun, Sep 09, 2007 at 07:10:59PM +0100, Stephane Chazelas wrote:
> > [...]
> >> What OS and version of glibc? I do get the error message but I
> >> get both a and b in the file.
> >> 
> >> That was on Linux, glibc 2.6.1.
> > [...]
> >
> > Actually,
> >
> > bash -c 'echo a; echo b > a' >&-
> >
> > is enough for me to reproduce the problem.
> 
> Guess you have a buggy libc, then.
[...]

I wouldn't be surprised if it has to do with the fix to debian
bug #429021. http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=429021
(I'm CCing Dmitry who is the author of that change according to
bugs.debian.org)

I was testing with debian package 2.6.1-2 that includes Dmitry's
fix for that bug. I don't know if that fix will is planned to be
included in the GNU tree, it doesn't seem it yet in the glibc
CVS repository.

Now, I'm not sure if we can say that the new glibc behavior
observed is bogus (other than it's different from the behavior
observed in all the libcs I tried with). It is not a harmless
change, for sure as it seems to have broken at least bash, zsh
and possibly ksh93.

Dmitry, you may find that whole thread at:
http://groups.google.com/group/gnu.bash.bug/browse_thread/thread/e311bdd4f945a21e/621b7189217760f1

Best regards,
St├ęphane




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