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Mon, 18 Apr 2011 14:37:03 -0600
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On 04/18/2011 06:11 AM, Daniel Schade wrote:
> Dear gnu.org Team,
> I have useed grep to search for double minus in a string and grep told me an
> error, take a look to the samples
> address@hidden echo "Test --" | grep -i '--'
This is not a bug in grep, but a misunderstanding on your part at how to
delimit the end of options.
echo "Test --" | grep -i -- --
instead. The first -- tells grep that all remaining arguments are not
options, but literal operands, so that the second -- can be used as the
This behavior is required by POSIX for most utilities (there are a few
exceptions, such as echo, but in general -- processing is a useful idiom
> address@hidden grep --version
> grep (GNU grep) 2.5.1
You may want to consider upgrading - the latest stable version is 2.7,
and fixes several bugs present in 2.5.1.
Eric Blake address@hidden +1-801-349-2682
Libvirt virtualization library http://libvirt.org
Description: OpenPGP digital signature
- grep, Daniel Schade, 2011/04/18