Date: Wed, 3 Jan 1996 13:45:12 -0700 From: kelly@fsl.noaa.gov (Sean Kelly) To: james@parody.tecc.co.uk Cc: doc@freebsd.org Subject: Re: Handbook - printer setup Message-ID: <9601032045.AA10768@emu.fsl.noaa.gov> In-Reply-To: <Pine.BSF.3.91.951229135243.322B-100000@parody.tecc.co.uk> (message from James Raynard on Fri, 29 Dec 1995 14:37:13 %2B0000 ())
next in thread | previous in thread | raw e-mail | index | archive | help
>>>>> "James" == James Raynard <james@parody.tecc.co.uk> writes:
James> The bit that really had me tearing my hair out was when I
James> tried to use the suggested text filter - I kept getting
James> errors 'execv of /usr/local/libexec/hpif failed'. After
James> checking the paths and were correct, checking that the
James> filter was world-readable and executable and successfully
James> piping into and out of the filter by hand I was at a
James> complete loss.
Is it possible it was world-readable/executable but NOT
owner-readable/executable, and the owner was daemon? (Or NOT
group-readable/executable and the group was daemon?) That would
prevent LPD from executing the filter. (That's an effective way to
exclude a user/group from executing a certain file while enabling
everyone else to do so.)
Did you try running the filter script yourself, by hand? As root, by
hand?
James> It did cross my mind that it could be a problem with
James> something being setuid.
The filter doesn't need to be setuid/setgid.
James> However, the Handbook says that the text filter is run by
James> lpd, which is not setuid or setgid on my system, so I
James> assumed it was something else.
Probably, but I'm not sure what.
James> As I had by now completely run out of ideas, I compiled a C
James> program which did the same as hpif. This worked!
I think it *has* to be the permissions on the script. Perhaps it was
something like
-rw-rw-rwx 1 daemon daemon 1294 hpif
Instead of
-r-xr-xr-x 1 daemon daemon 1294 hpif
The former means anyone but daemon and those in group daemon can run
the script. The latter means everyone can run the script.
--
Sean Kelly
NOAA Forecast Systems Laboratory, Boulder Colorado USA
I used to be a narrator for bad mimes. -- Steven Wright
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?9601032045.AA10768>