netbsd-help: perms of /sbin/dump

Subject: perms of /sbin/dump
To: None <netbsd-help@netbsd.org>
From: Wenchi Liao <wliao@midway.uchicago.edu>
List: netbsd-help
Date: 06/28/1999 11:04:04

I'm setting up a NetBSD 1.4 box for amanda backups, and I'm
curious about a permissions thing. I'm using default
install sets, so the permissions should be default as
well.
The disk devices are owner and group readable
 # ls -l /dev/rwd0a 
 crw-r----- 1 root operator 3, 0 Jun 8 04:31 /dev/rwd0a
while /sbin/dump is
 -r-xr-sr-x 2 root tty 241664 May 7 13:08 /sbin/dump
So: unless the dumper is root, doesn't the g+s keep a
legitimate user (belonging to operator group) from making
dumps?
According to the amanda logs, dump reports
 DUMP: Cannot open /dev/rwd0a
WL