RE: Postinstall hangs with bash

[Igor Pechtchanski <pechtcha at cs dot nyu dot edu>]

On Wed, 1 Oct 2003, Hannu E K Nevalainen (garbage mail) wrote:

> > From: Igor Pechtchanski
>
> > On Wed, 1 Oct 2003, Hannu E K Nevalainen (garbage mail) wrote:
> >
> > > > From: Igor Pechtchanski
> > >
> > > > On Wed, 1 Oct 2003, Hannu E K Nevalainen (garbage mail) wrote:
> > >
> > > <snip>
> > > > FWIW, if you're able to reproduce the hang, I'd be very interested
> > > > in seeing the results of the experiments outlined in the above
> > > > message on your machine...  Maybe you could glean something from
> > > > the strace output as well.
> > >
> > > $ for i in myPostinstall.sh.done  myPostinstall2.sh.done
> > > myPostinstall3.sh.done; do echo -e "\n---" $i "---";cat $i;done
> > >
> > > --- myPostinstall.sh.done ---
> > > #!/bin/bash -x
> > > echo "$(cygpath -w /)"
> > >
> > > --- myPostinstall2.sh.done ---
> > > #!/bin/sh -x
> > > bash -c "echo $(cygpath -w /)"
> > >
> > > --- myPostinstall3.sh.done ---
> > > #!/bin/sh -x
> > > strace -o postinstall.strace bash -c "echo $(cygpath -w /)"
> > >
> > > myPostinstall.sh does the "hang". (i.e. the first of your tests).
> > > The other two tests works just fine <SIGH> ;-) I've attached
> > > /postinstall.strace (name as it actually was created)
> >
> > Hannu,
> >
> > *If* you are able to reproduce the hang...  Otherwise the strace is
> > perfectly normal, and thus a waste of bandwidth...
>
>  8-/  I must have been totally "off".
>
> > Hmm, I just realized that you can run setup under strace!  It won't show
> > any Windows calls, obviously, but it will show calls to Cygwin programs,
> > which is what you want, anyway.  If you could reproduce the hang under
> > strace, that output might actually be useful.  You should only run the
> > first script, obviously.
> >       Igor
>
> $ mv myPostinstall.sh.done myPostinstall.sh
> $ rm /postinstall.strace
> $ strace -o /postinstall.strace  /install/setup.exe
>
>  Hrm... The hang doesn't occur.
>
> Checking:
> $ mv /postinstall.strace /postinstall.strace-nohang
> $ mv myPostinstall.sh.done myPostinstall.sh
> $ /install/setup.exe
>
>  No hang. 8-I
>
> Tried strace on postinstall/Xfree-bin-icons.sh - which have been doing the
> hang.
> -> No hang.
>
> Thinking about file/dir rights settings: With PI/Xfree...sh in mind;
> [snip]
>
> $ mv XFree86-bin-icons.sh.done XFree86-bin-icons.sh
> Testing this one again...
>
> It hangs. cygpath and one instance of bash is left behind if one hits
> cancel. Killing cygpath makes them disappear.
>
> Any ideas?
> /Hannu E K Nevalainen

Hannu,

Can you reproduce the hang under strace?  If so, try to make a copy of the
hanging script (and the one it calls) and pare them down to one or two
commands (they should still reproduce the hang, though).  Once you have
that, please attach the strace output from the simple script.
	Igor
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