Date: Sun, 06 Oct 1996 14:36:27 -0700 From: Amancio Hasty <hasty@rah.star-gate.com> To: Robert Eckardt <roberte@mep.ruhr-uni-bochum.de> Cc: joerg_wunsch@uriah.heep.sax.de, freebsd-hackers@freebsd.org Subject: Re: su problem Message-ID: <199610062136.OAA00365@rah.star-gate.com> In-Reply-To: Your message of "Sun, 06 Oct 1996 23:15:15 %2B0200." <199610062115.XAA01101@ghost.mep.ruhr-uni-bochum.de>
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>From The Desk Of Robert Eckardt :
> > > su -l hasty <shell>
> > >
> > > it gets a core dump...
> >
> > Analyze it. That's what coredumps are for.
> >
> > Are you sure that it's not actually
> >
> > su -l hasty -c "<something>"
>
> It would be nice if this would work.
> I was searching for that feature since the time I changed
> from SysVr3.2 to FreeBSD. (And it's not in the manpage.)
>
> Is the missing ability to execute commands like sh BSD-specific
> or a security precaution ?
>
> Robert
Hi ,
The problem is easy . I just ran the debugger in rc.local and debugged
su .
What it show is that su does:
p = getenv("TERM");
cleanenv[0] = NULL;
environ = cleanenv;
(void)setenv("PATH", _PATH_DEFPATH, 1);
(void)setenv("TERM", p, 1);
^^^ p is NULL
because TERM is not defined
if (chdir(pwd->pw_dir) < 0)
errx(1, "no directory");
}
if (asthem || pwd->pw_uid)
(void)setenv("USER", pwd->pw_name, 1);
(void)setenv("HOME", pwd->pw_dir, 1);
(void)setenv("SHELL", shell, 1);
So I stuck in rc.local :
HOME=/root
GROUP=wheel
SHELL=/bin/sh
LOGNAME=root
cd /root
PWD=/root
TERM=cons25
export TERM PWD HOME GROUP LOGNAME
su -l hasty /usr/home/hasty/foo
And now su works....
Someone should review "su.c".
Thank you,
Amancio
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