On 02/21/2014 03:23 PM, Eric Blake wrote:
> On 02/21/2014 03:08 PM, Dale Visser wrote:
>> I have a macro argument that I would like to place in a shell variable, but with a catch. I want to truncate it at the first space or comma. I have code that works for me (in Ubuntu), like this:
>>
>> my_var="$1"
>> my_var=${my_var%%\ *}
>> my_var=${my_var%%,*}
>>
> If you guarantee that your shell is capable (right now, that could be
> done by using the undocumented _AS_DETECT_REQUIRED macro), then your way
> is portable. Until then, the only portable fallback to this particular
> problem is the use of 'expr' pattern matching and/or sed scripts. :(
Or mess with IFS splitting:
my_var=$1
IFS=' ,'
set dummy $my_var
shift
IFS=' '' ''
'
my_var=$1
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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