[1748] in Athena Bugs
tcsh leads to failed /usr/athena/lib/init/aliases
daemon@ATHENA.MIT.EDU (geer@ATHENA.MIT.EDU)
Tue Feb 7 22:06:34 1989
From: <geer@ATHENA.MIT.EDU>
Date: Tue, 7 Feb 89 22:06:17 EST
To: bugs@ATHENA.MIT.EDU
as the tcsh does not follow the syntax of C when the
&& operator is present (vide supra), oddly incorrect
behavior can result when the standard dot-file referent
/usr/athena/lib/init/aliases is sourced.
in line #18 of that file, both conditionals are being
evaluated regardless of the success of each. when the
$term envar is not present, this can result in odd or
incorrect outcome.
jason% rcp /tmp/bar paris:/tmp/foobar
term: Undefined variable.
jason% rsh paris ls /tmp/foobar
term: Undefined variable.
/tmp/foobar not found
jason%
the file:
1 # This file contains standard C shell aliases.
2 #
3 # Win Treese
4 # MIT Project Athena
5 # 12/6/87
6 #
7 # $Source: /paris/source/4.3/athena.lib/init/RCS/aliases,v $
8 # $Author: probe $
9 # $Header: aliases,v 1.5 88/09/14 15:15:37 probe Exp $
10
11 # Aliases dealing with mail
12
13 alias mail 'Mail'
14 alias Mail 'more /usr/prototype_user/README.mail ; echo \!* > /dev/null'
15
16 # Aliases for the X window system
17
18 if ($?term && $term =~ xterm*) then
19 alias xresize 'set noglob; eval `resize` || unset noglob'
20 endif
tytso> You're quite correct; for some reason && is always evaluating
tytso> the second argument; the whole csh parser is really broken in a
tytso> lot of ways; this is just one of them.
tytso>
tytso> I'd suggest replacing line 18 with
tytso>
tytso> if ($?term) then
tytso> if ($?term =~ xterm*) then
tytso>
tytso> It's a hack, but it works.....
--dan
