compctl - aliasing hostnames

compctl - aliasing hostnames

[Sven Guckes]

I'd like to type "ssh alias" and be connected with "ssh hostname".
How could you "alias" a hostname with completion control?  Example:

	$ ssh alias
	guckes@hostname's password:

Sven

Re: compctl - aliasing hostnames

[Bart Schaefer]

On Jul 30, 11:07pm, Sven Guckes wrote:
> Subject: compctl - aliasing hostnames
> I'd like to type "ssh alias" and be connected with "ssh hostname".
> How could you "alias" a hostname with completion control?

Use "alias -g":

zsh% alias -g fnorgle=aixhost
zsh% ssh fnorgle
user@aixhost's Password:

Of course, that means that fnorgle will be replaced by aixhost everywhere
in all commands, not just in the ssh command.

Re: compctl - aliasing hostnames

[Geoff Wing]

Sven Guckes <guckes@math.fu-berlin.de> typed:
:I'd like to type "ssh alias" and be connected with "ssh hostname".
:How could you "alias" a hostname with completion control?  Example:
:	$ ssh alias
:	guckes@hostname's password:

ssh has a config file for this.  You don't need to do it with zsh.
RTFM ssh(1)

Something along the lines of:
    Host alias1
    Hostname realname1
    User user1
    Host alias2
    Hostname realname2
    # User user2 - unnecessary 'cos I'm the same as this host I'm sitting on
    Host alias3
    Hostname realname3
    User user3

-- 
Geoff Wing   <gcw@pobox.com>            Mobile : 0412 162 441
Work URL: http://www.primenet.com.au/   Ego URL: http://pobox.com/~gcw/

Re: compctl - aliasing hostnames -> ~/.ssh/config

[Sven Guckes]

Quoting Geoff Wing (mason@primenet.com.au):
> You don't need to do it with zsh.
> ssh has a config file for this.
> RTFM ssh(1)

Indeed.  Sorry about the noise.
And thanks for the example! :-)

Here's my example:

	$ cat ~/.ssh/config
	Host gauss
	Hostname Tr1ckyh0stNam3
	User argl0815
	$ ssh gauss
	argl0815@Tr1ckyh0stNam3's password:

Sven  [who really likes examples]

Re: compctl - aliasing hostnames -> ~/.ssh/config

[Roland Jesse]

Sven Guckes wrote:

> 	$ cat ~/.ssh/config

Which can of course be optimized to '< ~/.ssh/config'. ;-)

SCNR,
	Roland

Re: compctl - aliasing hostnames

[Todd Graham Lewis]

On Thu, 30 Jul 1998, Sven Guckes wrote:

> I'd like to type "ssh alias" and be connected with "ssh hostname".
> How could you "alias" a hostname with completion control?  Example:
> 
> 	$ ssh alias
> 	guckes@hostname's password:

I just want tab completion among all of our server boxes, and I use
the following to accomplish it:

    compctl -k hostlist ssh

    function hosts(){
        unset hostlist
        echo "Enter password on hunterd for host completion.  "
        set -A hostlist `echo "select hostname,status from hosttable;"| \
          ssh dbserver "psql hostdb 2>/dev/null"|grep Active| sed 's/|/ \
          /g'|awk '{print $1}'`

        # echo "hosts are $hostlist"
    }

"psql" is the PostgreSQL command-line query tool.  We track all of our
servers in a relational database using PostgreSQL; cf. www.postgresql.org
for more info.  We did this because I got tired of not being able to do
tab-completion on ssh's.  8^)

One could also just take the list from ~/.ssh/known-hosts, on the theory
that the weather today is pretty much like the weather yesterday.  One
could also set the completion command to run hosts(), where hosts()
either dumps the host database as it does above, or scans known-hosts,
when there's no match.

This wasn't what you asked for, but maybe some people will find it useful.

--
Todd Graham Lewis                                     (800) 719-4664, x2804
******Linux******         MindSpring Enterprises      tlewis@mindspring.net

Re: compctl - using hostnames with rlogin, rsh, and ssh

[Sven Guckes]

Quoting Todd Graham Lewis (tlewis@mindspring.net):
>     compctl -k hostlist ssh
> 
>     function hosts(){
>         unset hostlist
>         echo "Enter password on hunterd for host completion.  "
>         set -A hostlist `echo "select hostname,status from hosttable;"\
>           | ssh dbserver "psql hostdb 2>/dev/null"\
>           | grep Active\
>           | sed 's/|/ /g'\
>           | awk '{print $1}'`
>         # echo "hosts are $hostlist"
>     }

Looks like this could take quite a while to process.
I would rather use a given deafult list of hosts.

Here is the solution with the zsh setup at our site:

	hosts="" # make hosts an empty list
	if [[ -f ~/.zshhosts ]]; then
	  # read in host list from ~/.zshhosts
	  hosts=$(< ~/.zshhosts)
	  set -A hosts ${(f)hosts}
	else
	  # set the default host list
	  hosts=(erdos euler gauss leibniz pascal)

	compctl -k hosts -x 'p[2,-1]' -l '' -- rsh ssh
	compctl -k hosts -x 'c[-1,-l]' -u -- rlogin

Comments?

Sven

-- 
Sven Guckes guckes@math.fu-berlin.de            using zsh-3.0.5 [961218]
ZSH HomePage: http://www.zsh.org   | Latest version:  zsh-3.1.4 [980601]
ZSH Pages:    http://www.math.fu-berlin.de/~guckes/zsh/  Tips and tricks

Re: compctl - using hostnames with rlogin, rsh, and ssh

[Roland Jesse]

Sven Guckes writes:

 > 	if [[ -f ~/.zshhosts ]]; then
 > 	  # read in host list from ~/.zshhosts
 > 	  hosts=$(< ~/.zshhosts)

Does it matter whether the hostnames in ~/.zshhosts are all stored in
one big line or in one line per host name?

	Roland

Re: compctl - using hostnames with rlogin, rsh, and ssh

[Sven Guckes]

> 	if [[ -f ~/.zshhosts ]]; then
> 	  # read in host list from ~/.zshhosts
> 	  hosts=$(< ~/.zshhosts)

Quoting Roland Jesse (jesse@prinz-atm.cs.Uni-Magdeburg.DE):
> Does it matter whether the hostnames in ~/.zshhosts are
> all stored in one big line or in one line per host name?

Well, my ~/.zshhosts has one hostname per line.
Dunno whether it'll work with all hosts on one line.
Oh, heck, I'll give it a try:

	:%j
	:w
	:shell
	$ ssh <TAB>
	$ ssh erdos\ euler\ gauss\ leibniz\ pascal\ 

Nope, doesn't seem to work.

Sven  ['u', ":w" ;-)]

Re: compctl - using hostnames with rlogin, rsh, and ssh

[Thomas Köhler]

On Tue, Aug 04, 1998 at 09:11:10PM +0200, Sven Guckes wrote:

> > 	if [[ -f ~/.zshhosts ]]; then
> > 	  # read in host list from ~/.zshhosts
> > 	  hosts=$(< ~/.zshhosts)
> 
> Quoting Roland Jesse (jesse@prinz-atm.cs.Uni-Magdeburg.DE):
> > Does it matter whether the hostnames in ~/.zshhosts are
> > all stored in one big line or in one line per host name?
> 
> Well, my ~/.zshhosts has one hostname per line.
> Dunno whether it'll work with all hosts on one line.
> Oh, heck, I'll give it a try:
> 
> 	:%j
> 	:w
> 	:shell
> 	$ ssh <TAB>
> 	$ ssh erdos\ euler\ gauss\ leibniz\ pascal\ 
> 
> Nope, doesn't seem to work.

Not this way, no. You did a
   hosts=$(< ~/.zshhosts)
which doesn't work because all is in a variable. Try an array instead:
   hosts=($(< ~/.zshhosts))
This will work whether or not all hosts are in one line or there is one
hostname per line.

~> shosts=($(< sshhosts))
~> compctl -k shosts ssh
~> ssh a<tab>
~> ssh automatix.informatik.uni-wuerzburg.de
~> rhosts=($(< rshhosts))
~> compctl -k rhosts rsh
~> rsh a<tab>
~> rsh automatix.informatik.uni-wuerzburg.de
~> < sshhosts
automatix.informatik.uni-wuerzburg.de
datenbus.mayn.de
picard.franken.de
willkuere.informatik.uni-wuerzburg.de
~> < rshhosts
automatix.informatik.uni-wuerzburg.de datenbus.mayn.de picard.franken.de willkuere.informatik.uni-wuerzburg.de
~>

> Sven  ['u', ":w" ;-)]

CU,
Thomas

-- 
    Thomas Köhler    Email:     jean-luc@picard.franken.de
        <><           WWW:    http://home.pages.de/~jeanluc/
                      IRC:               jeanluc
      LCARS --- Linux for Computers on All Real Starships