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From: maart@cs.vu.nl (Maarten Litmaath)
Newsgroups: comp.sys.sun
Subject: Re: How does lpr decide on the user?
Keywords: SunOS
Message-ID: <2298@brazos.Rice.edu>
Date: 19 Oct 89 20:22:59 GMT
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Organization: Sun-Spots
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Approved: Sun-Spots@rice.edu
X-Sun-Spots-Digest: Volume 8, Issue 168, message 1 of 12

jon@astro.ucla.edu (Jonathan Eisenhamer) writes:
\A simple question: How does lpr decide on who is going to be the owner of
\a printing job?  [...]

If file descriptor 0, 1 or 2 refers to a tty, the owner of the job is the
person logged in on that tty, else it is the real uid... :-(
(Remember: lpr's effective uid is root.)
Work-around:

	% cat mylpr
	#!/bin/sh 

	exec 3>&1

	test -t 0 && exec < /dev/null

	(/usr/ucb/lpr ${1+"$@"} | cat >&3) 2>&1 | cat >&2

Now we're sure none of the mentioned file descriptors refers to a terminal.

A symbolic link is a POINTER to a file, | Maarten Litmaath @ VU Amsterdam:
 a hard link is the file system's GOTO. | maart@cs.vu.nl, mcsun!botter!maart