Date: Sun, 27 Oct 1996 16:19:12 -0700 (MST) From: Nate Williams <nate@mt.sri.com> To: Archie Cobbs <archie@whistle.com> Cc: current@freebsd.org Subject: Re: Strange bug related to fstat() Message-ID: <199610272319.QAA18645@rocky.mt.sri.com> In-Reply-To: <199610272250.OAA14535@bubba.whistle.com> References: <199610272250.OAA14535@bubba.whistle.com>
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> Within a little background daemon, the system() command is used
> to execute a command looking something like this:
>
> system("tar cf - file1 file2 | gzip -cf | uuencode files > output");
>
> What's happening is that gzip is failing, and the place it fails
> is where it tries to fstat() standard input:
>
> if (fstat(fileno(stdin), &istat) != 0) {
> error("fstat(stdin)");
> }
>
> The error it's getting is "Bad file descriptor".
...
> The only other possibilities seem to be a bug in /bin/sh or the
> kernel. As you can see, I need a little hint as to how to pursue
> this one...
Older versions of ash (pre-4.4Lite) used to get this error all the time,
so I suspect a sh bug.
I don't know for sure, but it's strikingly familiar.
Nate
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