[19527] in Athena Bugs
sun4 9.0.13: rc3
daemon@ATHENA.MIT.EDU (Jacob Morzinski)
Thu Aug 2 19:14:34 2001
Message-Id: <200108022314.TAA00730@m66-080-11.mit.edu>
To: bugs@MIT.EDU
Date: Thu, 02 Aug 2001 19:14:31 -0400
From: "Jacob Morzinski" <jmorzins@MIT.EDU>
System name: m66-080-11.mit.edu
Type and version: Ultra-5_10 9.0.13
Display type: m
Shell: /bin/athena/tcsh
Window manager: unknown
What were you trying to do?
While watching a Sun reboot, I noticed the warning
"rc3: test: argument expected"
appear on the screen just before X was started.
Investigation reveals that the error message is caused
by line 54 of /etc/rc3.
What's wrong:
Trivially, /etc/rc3 fails to quote arguments that it passes to
test. Less trivially, /etc/rc3 expects that it can use "who -r"
to learn the run-level of the init process, but in fact "who -r"
sometimes returns no output.
"Sometimes"? Yes, "sometimes". Consider the following:
m66-080-11.mit.edu# who -r
m66-080-11.mit.edu# telinit 2
m66-080-11.mit.edu# telinit 3
m66-080-11.mit.edu# who -r
. run-level 3 Aug 2 19:01 3 1 2
m66-080-11.mit.edu#
If someone can explain that to me, it should be easy to fix
the /etc/rc3 script.
What should have happened:
Script authors should always quote variable names,
and the "who" program should have less hidden state.
Please describe any relevant documentation references:
-
-Jacob
