NetBSD/sbin/devpubd/hooks/02-wedgenames

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#!/bin/sh
#
# $NetBSD: 02-wedgenames,v 1.1 2013/01/11 23:49:23 mlelstv Exp $
#
# Try to maintain symlinks to wedge devices
#
event="$1"
device="$2"
wedgedir=/dev/wedges
remove_wedge() {
find $wedgedir -print \
| sed -e 's# #\\ #g' \
| while read w; do
t=$(readlink "$w")
if [ x"$t" = x"/dev/$device" ]; then
rm -f "$w"
basedir=$(dirname "$w")
rmdir -p "$basedir" 2>/dev/null
fi
done
}
add_wedge() {
n=$(dkctl "$device" getwedgeinfo \
| sed -ne '1s#^[^:]*: ##p' \
| awk -v GOOD='._:;!^$&~()[]{}=,+-/' '
BEGIN {
for (i=0; i<256; ++i)
ord[sprintf("%c",i)] = i
}
{
n = length($0)
o = ""
for (i=1; i<=n; ++i) {
c = substr($0,i,1)
if (c ~ /^[[:alnum:]]$/ || index(GOOD,c) > 0) {
o = o c
} else {
o = o sprintf("%%%02x",ord[c])
}
}
printf "%s",o
}'
)
case $n in
"") ;;
*)
test -d $wedgedir || mkdir -m 755 $wedgedir
basedir=$(dirname "$wedgedir/$n")
test -d "$basedir" || mkdir -p -m 755 "$basedir"
ln -s "/dev/$device" "$wedgedir/$n"
;;
esac
}
case $device in
dk*)
case $event in
device-attach)
remove_wedge
add_wedge
;;
device-detach)
remove_wedge
;;
esac
;;
esac