Date: Mon, 04 Dec 2023 21:15:11 +0100 From: Steffen Nurpmeso <steffen@sdaoden.eu> To: freebsd-hackers@freebsd.org Subject: Fwd: Re: devd lid close event Message-ID: <20231204201511.u5fSPsTx@steffen%sdaoden.eu>
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--- Forwarded from Steffen Nurpmeso <steffen@sdaoden.eu> ---
Date: Mon, 04 Dec 2023 21:04:14 +0100
Author: Steffen Nurpmeso <steffen@sdaoden.eu>
From: Steffen Nurpmeso <steffen@sdaoden.eu>
To: "Dr. Amr Osman" <dr3mro@gmail.com>
Subject: Re: devd lid close event
Message-ID: <20231204200414.4PxUD8iy@steffen%sdaoden.eu>
Dr. Amr Osman wrote in
<CAEYFr1C-f+KX99wJ21qKy8pA2D4btuJNUaX-mJStcYstNDa8uQ@mail.gmail.com>:
|The issue now is that is activates twice, as the devd notify happens twice
|Tried pgrep the slock but it always launches slock twice
Well for one (i have no freebsd around to truly test this) it
might be necessary to background the thing in order not to block.
(This is what i need to do on Linux, for example i now do
volume() {
(
cd /
/root/bin/volume.sh "$1"
) </dev/null >/dev/null 2>&1 &
}
so that i neither have a CWD in a path of a mounted volume that
may go away upon LID close etc. Also, due to a bug, i got piles
of dozens / hundreds of jobs in the queue, which can only be
avoided by moving the ACPI job to the background, aka by
daemonizing it. (That it then is reparented to init/process 1 is
something i still have to think about.))
And second, if all else fails, you may need to enwrap it in
a shell script, maybe even with file locking. (flock(1).)
Ie, my zzz.sh does in the main path
# Neutralize $PWD to avoid umount(8) etc problems
cd /
if [ -f /run/.zzz.run ]; then
logger -s -t /root/bin/zzz.sh "recursively invoked"
exit 0
fi
: > /run/.zzz.run
trap 'rm -f /run/.zzz.*' EXIT
trap 'trap "" HUP INT QUIT TERM; exit 1' HUP INT QUIT TERM
down_stuff
down_check
down_main
[ $# -eq 0 ] && once= || once=y
while :; do
[ -n "$once" ] && lid_is_open && break
once=y
down_off
lid_exists || break
sleep $SLEEP &
wait $!
done
# Sleep a bit to let it settle
( sleep .5 ) >/dev/null 2>&1
up_main
sleep 1
up_stuff
Ciao,
--steffen
-- End forward <20231204200414.4PxUD8iy@steffen%sdaoden.eu>
--steffen
|
|Der Kragenbaer, The moon bear,
|der holt sich munter he cheerfully and one by one
|einen nach dem anderen runter wa.ks himself off
|(By Robert Gernhardt)
|
| Only in December: lightful Dubai COP28 Narendra Modi quote:
| A small part of humanity has ruthlessly exploited nature.
| But the entire humanity is bearing the cost of it,
| especially the inhabitants of the Global South.
| The selfishness of a few will lead the world into darkness,
| not just for themselves but for the entire world.
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