[9fans] Tip of the day...

[9fans] Tip of the day...

[lucio]

Here's me being clever:

	% echo dma on | tee /dev/sdC0/ctl > /dev/sdD0/ctl

Now, this can be extended by adding "tee" commands as required, but I
can't think of an elegant way to do this depending on the available
DMA-capable drives.  I know that my shell programming tricks
repertoire is very limited, so I presume somebody out there will be
able to enhance the command in a scalable way (we're talking abount
only a few drives, really).

As given, it is all I have had a need for, so I'm quite pleased with
myself :-)

++L

Re: [9fans] Tip of the day...

[roger peppe]

>         % echo dma on | tee /dev/sdC0/ctl > /dev/sdD0/ctl

i'm sure i'm being stupid here, but why is that better (or different) than:

% echo dma on > /dev/sdD0/ctl
% echo dma on > /dev/sdC0/ctl

?

Re: [9fans] Tip of the day...

[lucio]

> % echo dma on > /dev/sdD0/ctl
> % echo dma on > /dev/sdC0/ctl

Because I often have to type it from the console and I find it
terribly irritating to have to repeat that "echo dma on".  Weird, but
true.  Just one of those things.

++L

Re: [9fans] Tip of the day...

[erik quanstrom]

how about
	
	#!/bin/rc
	# turn dma on with abandon

	# only sdata drives do this dma thing.
	# only tweek drives on this system (hence #S).
	d=`{awk '$2 == "ata" {print $1}'<'#S/sdctl'}

	for(i in '#S'/^$d^*/ctl)
		awk '$6 > 0 && $8 == 0 {print "echo dma on > " ENVIRON["i"]}'<$i |
		sed 's/#/''#''/g' |
		rc

- erik

Re: [9fans] Tip of the day...

[Antonin Vecera]

On Nov 26, 2007 1:48 PM, erik quanstrom <quanstro@quanstro.net> wrote:
> how about
>
>         #!/bin/rc
>         # turn dma on with abandon
>
>         # only sdata drives do this dma thing.
>         # only tweek drives on this system (hence #S).
>         d=`{awk '$2 == "ata" {print $1}'<'#S/sdctl'}
>
>         for(i in '#S'/^$d^*/ctl)
>                 awk '$6 > 0 && $8 == 0 {print "echo dma on > " ENVIRON["i"]}'<$i |
>                 sed 's/#/''#''/g' |
>                 rc
>
> - erik
>

/bin/dmaon

Antonin

[9fans] tip of the day

[cinap_lenrek]

mycroftiv just showed me a trick he learned from uriel:

bind /net/tcp /proc
ps

--
cinap

Re: [9fans] tip of the day

[andrey mirtchovski]

> bind /net/tcp /proc
> ps

but the context in which it was introduced was different:

http://9fans.net/archive/2007/03/326

Re: [9fans] tip of the day

[cinap_lenrek]

ah, thanks :)

--
cinap