On Tue, 14 Oct 2003, Brian Ford wrote:
> On Tue, 14 Oct 2003, chris wrote:
>
> > If I comment out the call to SHGetPathFromIDList in this program, the
> > program returns, else it hangs.
> >
> Confirmed.
>
> > Also, This program seems to be both valid c++ and c code. If it is
> > compiled in gcc, all is fine. In g++, it hangs.
> >
> Really? I see the hang regardless.
>
It is also valid -mno-cygwin code, and when compiled this way, it still
hangs. Doesn't this eliminate a good portion of the Cygwin startup code
since this is a MINGW executable?
It must be something the exec stub did? I do see a few cases of suspended
starting in spawn_guts. Might it have forgotten to resume? Is there an
easy way to tell if it is suspended?
I'm still puzzled about why the input redirect helps. Recap:
/etc/postinstall/hang.sh:
#!/bin/bash
FOO=`hangprog.exe < /dev/null`
BAR=`hangprog.exe` # hangs here!
where hangprog.exe is:
> > -- Code begins --
> >
> > #include <shlobj.h>
> >
> > void fee (void) {
> > char *buf;
> >
> I changed this to char buf[255] just to be safer.
>
> > LPITEMIDLIST id;
> > SHGetPathFromIDList (id, buf); // Comment this out and no hang.
> > }
> >
> > int main (int argc, char **argv)
> > {
> > return 0;
> > }
> >
--
Brian Ford
Senior Realtime Software Engineer
VITAL - Visual Simulation Systems
FlightSafety International
Phone: 314-551-8460
Fax: 314-551-8444
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