Very Computer

alias show 'if ($?\!:1) then \
                if ($#\!:1) then \
                        echo "\!:1 = $\!:1" \
                else \
                        echo "\!:1 is set" \
                endif \
        else \
                echo "\!:1 is not set" \
        endif'

But the "\" at the end of each line doesn't embed a newline into the alias
as needed for the if-then-else to work right.

Is there any way to embed newlines into alias definitions?

Mike Khaw
--

usenet:    {hplabs|sun|ucbvax|decwrl|sri-unix}!mkhaw%teknowledge-vaxc.arpa
USnail:    Teknowledge Inc, 1850 Embarcadero Rd, POB 10119, Palo Alto, CA 94303

alias test      'foreach i (\!*) \
                 echo $i \
                 end'

And watch your (mine, at least) csh core dump.  I think it has to do
with how csh determins whether you're on a interactive session or not.
The same alias executed from a shell script seems to work well.

P.S.  Don't try this on your login shell.
=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+
Theodore Ts'o                           |
mit-eddie!mit-athena!tytso              |     M.I.T.,

on the side, this dumps core on an Encore running UMAX 4.2:

        mkdir x
        mkdir y
        set home=x/y    # not absolute!
        cd
        cd ../..        # reference to $home?
        ***BOOM***

I know it's a stupid thing to do, but it shouldn't dump core.  actually, the
cd ../.. should work, it's cd by itself that should have trouble, though just
with not being able to find $home.
        -randy
(Just tried it on our vanilla [for now] 4.3 VAX - another core dump!)
--
Randy Orrison, University of Minnesota School of Mathematics
UUCP:   {ihnp4, seismo!rutgers!umnd-cs, sun}!umn-cs!randy

Quote:>    set home=x/y    # not absolute!
>    cd
>    cd ../..        # reference to $home?
>    ***BOOM***

Quote:>(Just tried it on our vanilla [for now] 4.3 VAX - another core dump!)

--

              {uunet,ucbvax,sun,decwrl,<smart-site>}!epimass.epi.com!jbuck

What so hard about that?

Joel Clark
Intel Scientific Computers                      joel%isc.intel.com
(503) 629-7732                          {tektronix}!ogcvax!intelisc!joel
My employer will disavow any knowledge of my actions....Hi Ollie.

Csh bomber:

mkdir x x/y
set home = x/y
cd x/y
cd ../..
*** BOOM! ***
core dumped

I also tried it on a VAX 750, 8650 and 785 running 4.2, 4.3 BSD, and Ultrix.
They *ALL* died.  Well, UNIX is portable is that sense..... :-)

I guess the thing is that, when you say cd ../.., $home cannot go that
far, and the pointer runs off the head of the string 'x/y'.  (First ..,
go to 'x' and next .., where? Oops!)

I hope you guys keep posting interesting things like this..... (:->

- Stephen

$ HOME='xxx???yyy' csh
(null): No match.
Illegal instruction
$

Also works with PATH, TERM and USER.

For a change, you could try:

$ HOME='`/bin/date >/dev/tty`' csh
Fri Sep  4 17:50:22 MET DST 1987

This causes csh to hang.  It also leaves you a zombie process.  Apparently
csh does not wait for the child process it just forked off.
Note that you have to specify a full path name, because $path has not yet
been set, as you can observe by trying HOME='`set >/dev/tty`'.

                                        Hans Mulder