NULLCMD

NULLCMD

[Timothy Luoma]

I don't seem to understand the NULLCMD function.

Say I have a lot of files I want to move to

/Some/Dir/Somewhere

and I want to drag them to the window and drop them and hit return (after  
each one) so that I might drop a file and the path would be

/path/to/real/file.txt

is there a way to use the NULLCMD feature so that if I drop a pathname it  
will know that I want to move that file to /Some/Dir/Somewhere?

right now I just get:

zsh: permission denied /path/to/real/file.txt

thanks
TjL

Re: NULLCMD

[Bart Schaefer]

On Jul 11, 12:45am, Timothy Luoma wrote:
} Subject: NULLCMD
}
} I don't seem to understand the NULLCMD function.

It's what gets executed when you redirect output from nowhere, e.g.

zsh% > /some/file

is equivalent to

zsh% $NULLCMD > /some/file

Conversely, READNULLCMD is what gets executed when you redirect input to
nowhere; e.g.

zsh% < /some/file

is equivalent to

zsh% $READNULLCMD < /some/file

Here's a way to fill your disk with foo:

zsh% echo foo > foo
zsh% >>foo <foo

} is there a way to use the NULLCMD feature so that if I drop a pathname it  
} will know that I want to move that file to /Some/Dir/Somewhere?

No.

You'd have to start a loop like this:

zsh% while read name; do mv $name /Some/Dir/Somewhere; done

Then you drag, drop, and hit return, until you've moved all the files;
and when done, you type ctrl-D to terminate the loop.

-- 
Bart Schaefer                                 Brass Lantern Enterprises
http://www.well.com/user/barts              http://www.brasslantern.com

Re: NULLCMD

[Hrvoje Niksic]

"Bart Schaefer" <schaefer@candle.brasslantern.com> writes:

> Here's a way to fill your disk with foo:
> 
> zsh% echo foo > foo
> zsh% >>foo <foo

cat: input/output files '-' identical

Shame.

-- 
Hrvoje Niksic <hniksic@srce.hr> | Student at FER Zagreb, Croatia
--------------------------------+--------------------------------
Unspeakable horrors from outer space paralyze the living and
resurrect the dead!

Re: NULLCMD

[Geoff Wing]

Hrvoje Niksic <hniksic@srce.hr> typed:
:"Bart Schaefer" <schaefer@candle.brasslantern.com> writes:
:> Here's a way to fill your disk with foo:
:> zsh% echo foo > foo
:> zsh% >>foo <foo
:cat: input/output files '-' identical
:Shame.

Hmmm, worked for me.  Probably means it's time to fix my OS's cat, since I
can't think of any applications where this is desirable.
-- 
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