On Fri, 15 Jun 2012, Oliver Fromme wrote:
Warren Block wrote:
> [...]
> > > > > attach 50 {
> [...]
>
> Even with those changes, devd is not triggering on my scanner attach:
>
> match "subsystem" "DEVICE";
> match "type" "ATTACH";
> match "cdev" "ugen[0-9]+.[0-9]+";
> match "vendor" "0x04b8";
> match "product" "0x010a";
> action "echo HERE! $cdev > /tmp/zoot";
Have you tried to put those lines inside a "notify" block
instead of an "attach" block? The documentation is not
very clear about the difference between an "attach" block
an a "notify" block with $type=ATTACH, but it probably
wouldn't hurt to try both.
Well, it did work with an attach event. Progress: the event is seen
with a notify event. However, something is not right with the execution
of backticks in the action string:
notify 20 {
match "subsystem" "DEVICE";
match "type" "ATTACH";
match "cdev" "ugen[0-9]+.[0-9]+";
match "vendor" "0x04b8";
match "product" "0x010a";
action "devnum=`echo $cdev | sed -e 's/^ugen//'` && \
echo $devnum > /tmp/example && \
echo $cdev >> /tmp/example";
};
When the event is seen:
Executing 'devnum=`echo ugen0.6 | sed -e 's/^ugen//'` && echo devnum: > /tmp/example
&& echo cdev: ugen0.6 >> /tmp/example'
$devnum never gets a value, the contents of /tmp/example are:
devnum:
cdev: ugen0.6
Trying $() instead of backticks makes it worse:
Executing 'devnum=$(echo $cdev | sed -e 's/^ugen//') && echo devnum: $devnum > /tmp/example
&& echo cdev: $cdev >> /tmp/example'
/tmp/example is then:
devnum:
cdev:
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