On 24 Apr 2009, at 10:42, Martin Costabel wrote:
> Charles Lepple wrote:
> []
>> 'grep -c' should be able to cope with empty input (returning 0), as
>> long as you are passing a regex (in this case, 'org.finkproject.dbus-
>> session'). Are you sure it isn't something else?
>
> Well, I tried this: On 10.4.11, I run
>
> launchctl list | grep -c foo
>
> It returns "0" eventually, but it can take a long time to do so,
> sometimes up to a minute.
>
> This is not deterministic; sometimes it returns immediately. A simple
> "launchctl list" returns immediately every time, as does the command I
> proposed,
>
> (echo ""; launchctl list) | grep -c foo
>
> Weird.
>
Really weird ...
Trying to confirm this, I get, on 10.4.11,
> # while true; do time { launchctl list | grep -c foo ; } ; done
> 2>&1 | fgrep real
> real 0m4.101s
> real 0m0.058s
> real 0m0.030s
> real 0m0.024s
> real 0m0.037s
> ...
all the rest of the same order; only the first is long.
And launchctl list | wc -l gives only 15
On 10.5, all results are between .5 and 1 second; with no difference
between
the first and subsequent ones.
There launchctl list | wc -l gives 142 ...
(All this is with fink's grep, but I don't think grep is at issue
here ..)
JF
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