Re: cold plugging

["Alexander E. Patrakov" <patrakov@ums.usu.ru>]

Kay Sievers wrote:

>I'm using this:
>	list=$(echo /sys/bus/*/devices/*/uevent)
>	list="$list $(echo /sys/class/*/*/uevent)"
>	list="$list $(echo /sys/block/*/uevent /sys/block/*/*/uevent)"
>	for i in $list; do
>	    case "$i" in
>		*/device/uevent|*\**)
>		    continue
>		    ;;
>		*/class/mem/*|*/class/tty/*)
>		    first="$first $i"
>		    ;;
>		*/block/md*)
>		    last="$last $i"
>		    ;;
>		*/*)
>		    default="$default $i"
>		    ;;
>	    esac
>	done
>
>	# trigger the sorted events
>	for i in $first $default $last; do
>	    echo "add" > "$i"
>	done
>  
>
Why sort the events? They arrive at udevd in random order anyway.

>To wait for the events to finish (if you need to), I do:
>	loop00
>	while test -d /dev/.udev/queue; do
>	    sleep 0.1;
>	    test "$loop" -gt 0 || break
>	    loop=$(($loop - 1))
>	done
>  
>
USB uevents easily get past this loop. I have a check in my script that 
sleeps 2 seconds after that and reports all new uevents in those 2 
seconds as possible bugs.

-- 
Alexander E. Patrakov


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