Re: random number generator

[Eric Blake]

On 08/18/2010 01:13 PM, mikeyzman wrote:
> Anyway, I'm not getting any echo back of the random number call, but the
> good news is M4 seems to be expanding without errors, I'm probably just
> missing an argument or something.
> 
> define(`number',`esyscmd(`/bin/bash -c "printf \"$RANDOM\""')')dnl

It worked for me:

$ m4
define(`number',`esyscmd(`/bin/bash -c "printf \"$RANDOM\""')')dnl
number
24246
number
4597
number
17644

> 
> The above is ultimately what Im trying to do, but when I include this and
> then type 'number', I don't see any output.   BTW this is command line mode
> for M4.   What I'm doing is invoking M4 command line style and then
> "include(`myinclude')" where myinclude has the above definition.  I should
> then be able to type number and get a number kicked back.   But what else am
> I missing? 

One other thing to try is m4's debugmode; 'm4 -daeqt' can prove rather
invaluable for tracing every single macro call.

-- 
Eric Blake   address@hidden    +1-801-349-2682
Libvirt virtualization library http://libvirt.org

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