Tar stackdump on bad mountpoint

Christopher Faylor cgf@redhat.com
Fri Oct 5 14:59:00 GMT 2001

[I swear that my mail reader has changed so that it is easier to send
private responses.  I originally responded just to Jonathan.  Sigh.]

This has been fixed in the most recent CVS + snapshots.


On Thu, Oct 04, 2001 at 09:37:49AM -0400, Jonathan Kamens wrote:
>With the current CVS repository....
>1) Pick a drive letter that doesn't exist on your machine (I'll use
>   "q:" in this example).
>2) Run "mkdir -p /q/q".
>3) Run "mount -s -b -x q: /q".
>4) Run "tar --listed-incremental /tmp/foo --create --file /dev/null
>   /q".  You'll get something like:
>     tar: /q/q: Cannot stat: No such file or directory
>     tar: Removing leading `/' from member names
>     tar: Error exit delayed from previous errors
>   So far so good.
>5) Now run "tar --listed-incremental /tmp/foo --create --file
>   /dev/null /cygdrive/c/cygwin/q" (assuming that your Cygwin is
>   installed in c:/cygwin).  You'll get something like:
>     tar: /cygdrive/c/cygwin/q/q: Cannot savedir: No such file or directory
>     Segmentation fauilt (core dumped)
>   This also happens if you mount c: as /c and use /c/cygwin/q
>   instead of /cygdrive/c/cygwin/q.
>I was unable, with the minimal effort for which I have time at the
>moment, to get a useful stack trace out of the running tar when this
>problem occurs.  I do not have any more time to investigate this
>today, because I've got two stop-ship bugs in my own product that I
>need to fix today on penalty of death :-).  I will investigate this
>problem as soon as I possibly can (which, alas, may not be until next
>Thursday, because of the bugs I need to fix here and because I'll be
>out Tuesday and Wednesday of next week), but in the meantime, I wanted
>to give a heads up because I know there were mumblings about releasing
>1.3.4 and it may need to be held up because of this.
>Sorry I can't help more right away....
>  jik

cgf@cygnus.com                        Red Hat, Inc.
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