Date: Wed, 22 Mar 2017 04:13:07 +0000 From: Glen Barber <gjb@FreeBSD.org> To: "Rodney W. Grimes" <freebsd-rwg@pdx.rh.CN85.dnsmgr.net> Cc: Chris Sinjakli <chris@sinjakli.co.uk>, freebsd-hackers@freebsd.org, "Rodney W. Grimes" <rgrimes@FreeBSD.org> Subject: Re: A historical curiosity in su(1) Message-ID: <20170322041307.GB42680@FreeBSD.org> In-Reply-To: <201703212312.v2LNCN7A071745@pdx.rh.CN85.dnsmgr.net> References: <CAN-H%2BybmipbPq59HGVsfouS_8v-ezDbU%2B4PKtiTwj3tv-LjOyw@mail.gmail.com> <201703212312.v2LNCN7A071745@pdx.rh.CN85.dnsmgr.net>
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On Tue, Mar 21, 2017 at 04:12:23PM -0700, Rodney W. Grimes wrote:
> > Jumping back to the point I made in the talk, the result of getlogin can often
> > be surprising. For example, a daemon restarted by a supervisor (e.g. upstart)
> > will be associated with the user that issued the restart (i.e. getlogin would
> > return "chris" if I restarted it, rather than something like "daemon-user"). Any
> > daemon that calls su will run into this behaviour.
>
> su - should resolve that behavior.
>
For clarification with special characters, this is 'su -', which indeed
does resolve the behavior described. From the su(1) manual page:
su -l foo
Simulate a login for user foo.
su - foo
Same as above.
su - Simulate a login for root.
Glen
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