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From: mark.umcp-cs%udel-relay@sri-unix.UUCP
Newsgroups: net.unix-wizards
Subject: Re:  question about getpass
Message-ID: <2067@sri-arpa.UUCP>
Date: Sun, 12-Jun-83 20:32:47 EDT
Article-I.D.: sri-arpa.2067
Posted: Sun Jun 12 20:32:47 1983
Date-Received: Tue, 14-Jun-83 03:56:29 EDT
Lines: 12

From:  Mark Weiser 

	In the documentatin of getpass(3) it says that the routine
	reads a password from standard input if it connot open
	"/dev/tty."  How can one make /dev/tty unopenable?  Thanks
	for any suggestions or solutions.

An easy way to make /dev/tty unopenable is for someone to open it exclusive
mode.  This works for everyone but the superuser, who can always
open everything (at least in 4.1bsd).  I haven't found any way around the 
superuser exception.
+