Is there any way to make up arrow show last command in CSh? - Shell Programming and Scripting

sayeo · #1 (**permalink**) 03-21-2008

Hi, I've been looking for a way to make the up arrow show the last command in csh, like how it does in bash/ksh. I've been googling and just can't find anything.....anybody have any ideas? thanks!

drl · #2 (**permalink**) 03-22-2008

Hi.

Quote:

The command-line editor (+)
Command-line input can be edited using key sequences much like those
used in GNU Emacs or vi(1). The editor is active only when the edit
shell variable is set, which it is by default in interactive shells.
The bindkey builtin can display and change key bindings. Emacs-style
key bindings are used by default (unless the shell was compiled other-
wise; see the version shell variable), but bindkey can change the key
bindings to vi-style bindings en masse.

The shell always binds the arrow keys (as defined in the TERMCAP envi-
ronment variable) to

down down-history
up up-history
left backward-char
right forward-char

unless doing so would alter another single-character binding.

-- excerpt form man tcsh

I looked quickly through man csh on Solaris 10 and found nothing relating to this, so if you are required to use the real csh (not tcsh), you may be out of luck for this feature. However, tcsh was installed on Solaris 10.

Best wishes ... cheers, drl

sayeo · #3 (**permalink**) 03-22-2008

OK, I've changed my default login shell to tcsh, but it seems that the bindkey builtin is not installed. "bindkey" and "man bindkey" both do nothing, although the same excerpt in your post is also in my tcsh manpage. Strange....Is bindkey a redhat-only feature or something? Also, when I enter "$VERSION" to check the shell version, it says it's an undefined variable. So at this point I don't even know what tcsh version I have. Any ideas?

sayeo · #4 (**permalink**) 03-22-2008

Hmmm......I think I forgot to log off and log in again after I changed my login shell......hence all the errors. Silly me. So problem solved for now. Thanks!

drl · #5 (**permalink**) 03-22-2008

Hi.

Here's how I usually find the tcsh version; this is from Solaris 10:

Code:

$ tcsh -c 'echo "tcsh $tcsh"'
tcsh 6.12.00

Using the usual GNU/Linux idiom:

Code:

tcsh --version

produces more information.

These also work on FreeBSD and GNU/Linux.

Were you in tcsh when you tried bindkey? ... cheers, drl

drl · #6 (**permalink**) 03-22-2008

Hi.

Quote:

Originally Posted by sayeo

Hmmm......I think I forgot to log off and log in again after I changed my login shell......hence all the errors. Silly me. So problem solved for now. Thanks!

OK, good ... cheers, drl

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