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#!/bin/sh
# see also update-pciids.sh (fancier)
[ "$1" = "-q" ] && quiet="true" || quiet="false"
set -e
SRC="http://www.linux-usb.org/usb.ids"
DEST=/var/lib/usbutils/usb.ids
# if usb.ids is read-only (because the filesystem is read-only),
# then just skip this whole process.
if ! touch ${DEST} >&2 >/dev/null ; then
${quiet} || echo "${DEST} is read-only, exiting."
exit 0
fi
if which wget >/dev/null 2>&1 ; then
DL="wget -O $DEST.new $SRC"
${quiet} && DL="$DL -q"
elif which lynx >/dev/null 2>&1 ; then
DL="eval lynx -source $SRC >$DEST.new"
else
echo >&2 "update-usbids: cannot find wget nor lynx"
exit 1
fi
if ! $DL ; then
echo >&2 "update-usbids: download failed"
rm -f $DEST.new
exit 1
fi
if ! grep >/dev/null "^C " $DEST.new ; then
echo >&2 "update-usbids: missing class info, probably truncated file"
exit 1
fi
if [ -f $DEST ] ; then
mv $DEST $DEST.old
# --reference is supported only by chmod from GNU file, so let's ignore any errors
chmod -f --reference=$DEST.old $DEST.new 2>/dev/null || true
fi
mv $DEST.new $DEST
${quiet} || echo "Done."