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Date: Thu, 6 Nov 2003 14:21:02 +0100
From: Simon Barner <barner@in.tum.de>
To: Philipp Westphal <wasa@dark-waves.de>
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cc: freebsd-current@freebsd.org
Subject: Re: Bus error
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Hi,

> Hi today, cvsup'ed my source and build world ...
> and now get an so called
>=20
> Bus error
>=20
> while i want to su, anyone know about it (or fixed it)

I think the best is to build debugging version of su:

# cd /usr/src/usr.bin/su=20
# make clean
# make depend
# set CFLAGS=3D"$CFLAGS -g"
# make
# install  -o root -g wheel -m 4555  -fschg /usr/obj/usr/src/usr.bin/su/su =
/usr/bin

( 'make install' will strip the binary and all the nice debug info is
gone)

Now run su in the debugger, and will probably get a core dump:

gdb /usr/bin/su  =20
GNU gdb 5.2.1 (FreeBSD)
Copyright 2002 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain condition=
s.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i386-undermydesk-freebsd"...(no debugging symbo=
ls found)...
(gdb) run
Starting program: /usr/bin/su=20


When it crashes, get a backtrace (in gdb: `bt full' and post it here).

Simon

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