How to pass parameters containig options from variables

How to pass parameters containig options from variables

[bd]

Hello list,

I am trying to pass these arguments

	-N -p -F "not host foo"

to a binary, but

	ARGS="-N -p -F 'not host foo'"
	$DAEMON $ARGS

get's passed as 6 arguments and not 4.

Using xargs this works, but I'd like to not introduce that dependency:

	ARGS="-N -p -F 'not host foo'"
	echo $ARGS | xargs $DAEMON

Now for the complete picture, it's the init script for arpwatch. Options that
should be passed to arpwatch can be specified by the sysadm in
/etc/default/arpwatch with is sourced by the initscript and then passed (via
start-stop-daemon) to the arpwatch binary.

This is on debian stable, package version 0.5.5.1-7.4

	Stefan
-- 
Reader, suppose you were an idiot.  And suppose you were a member of
Congress.  But I repeat myself.
		-- Mark Twain

Re: How to pass parameters containig options from variables

[Olof Johansson]

Hi,

On 2012-09-25 10:47 +0200, bd@bc-bd.org wrote:
> I am trying to pass these arguments
> 
> 	-N -p -F "not host foo"
> 
> to a binary, but
> 
> 	ARGS="-N -p -F 'not host foo'"
> 	$DAEMON $ARGS
> 
> get's passed as 6 arguments and not 4.

eval $DAEMON $ARGS should work.

-- 
 --------------------------------------------------------------- 
| Olof Johansson                              http://stdlib.se/ |
|  irc: zibri                           https://github.com/olof |
 --------------------------------------------------------------- 

Re: How to pass parameters containig options from variables

[bd]

Hi,

> eval $DAEMON $ARGS should work.

That did it, thank you.

Regards,

	Stefan
-- 
BOFH excuse #230:

Lusers learning curve appears to be fractal

Re: How to pass parameters containig options from variables

[Paul Gilmartin]

On Sep 25, 2012, at 10:28, bd@bc-bd.org wrote:
> 
>> eval $DAEMON $ARGS should work.
> 
> That did it, thank you.
>  
... but always beware of "eval" if you don't absolutely
control the argument string.  A single semicolon and
someone owns your process.

-- gil

Re: How to pass parameters containig options from variables

[Harald van Dijk]

On 25-9-2012 18:48, Paul Gilmartin wrote:
 > On Sep 25, 2012, at 10:28, bd@bc-bd.org wrote:
 >>> eval $DAEMON $ARGS should work.
 >> That did it, thank you.
 > ... but always beware of "eval" if you don't absolutely
 > control the argument string.  A single semicolon and
 > someone owns your process.
For a configuration file that gets sourced, the person creating the 
configuration file already owns the process, so there is no added 
security by avoiding eval here.