1 files changed, 97 insertions, 0 deletions
diff --git a/update-pciids.sh b/update-pciids.sh
new file mode 100755
index 0000000..607502a
--- /dev/null
+++ b/update-pciids.sh
@@ -0,0 +1,97 @@
+#!/bin/sh
+
+set -e
+
+SRC="https://pci-ids.ucw.cz/v2.2/pci.ids"
+DEST=pci.ids
+PCI_COMPRESSED_IDS=
+GREP=grep
+VERSION=unknown
+USER_AGENT=update-pciids/$VERSION
+QUIET=
+
+[ "$1" = "-q" ] && quiet=true || quiet=false
+
+# if pci.ids is read-only (because the filesystem is read-only),
+# then just skip this whole process.
+if ! touch ${DEST} >/dev/null 2>&1 ; then
+	${quiet} || echo "${DEST} is read-only, exiting." 1>&2
+	exit 1
+fi
+
+if command -v xz >/dev/null 2>&1 ; then
+	DECOMP="xz -d"
+	SRC="$SRC.xz"
+elif command -v bzip2 >/dev/null 2>&1 ; then
+	DECOMP="bzip2 -d"
+	SRC="$SRC.bz2"
+elif command -v gzip >/dev/null 2>&1 ; then
+	DECOMP="gzip -d"
+	SRC="$SRC.gz"
+else
+	DECOMP="cat"
+fi
+
+if command -v curl >/dev/null 2>&1 ; then
+	${quiet} && QUIET="-s -S"
+	dl ()
+	{
+		curl -o $DEST.new --user-agent "$USER_AGENT curl" $QUIET $SRC
+	}
+elif command -v wget >/dev/null 2>&1 ; then
+	${quiet} && QUIET="-q"
+	dl ()
+	{
+		wget --no-timestamping -O $DEST.new --user-agent "$USER_AGENT wget" $QUIET $SRC
+	}
+elif command -v lynx >/dev/null 2>&1 ; then
+	dl ()
+	{
+		lynx -source -useragent="$USER_AGENT lynx" $SRC >$DEST.new
+	}
+else
+	echo >&2 "update-pciids: cannot find curl, wget or lynx"
+	exit 1
+fi
+
+if ! dl ; then
+	echo >&2 "update-pciids: download failed"
+	rm -f $DEST.new
+	exit 1
+fi
+
+if ! $DECOMP <$DEST.new >$DEST.new.plain ; then
+	echo >&2 "update-pciids: decompression failed, probably truncated file"
+	exit 1
+fi
+
+if ! $GREP >/dev/null "^C " $DEST.new.plain ; then
+	echo >&2 "update-pciids: missing class info, probably truncated file"
+	exit 1
+fi
+
+if [ -f $DEST ] ; then
+	ln -f $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 $DEST.new.plain 2>/dev/null || true
+fi
+
+if [ "$PCI_COMPRESSED_IDS" = 1 ] ; then
+	if [ "${SRC%.gz}" != .gz ] ; then
+		# Recompress to gzip
+		gzip <$DEST.new.plain >$DEST.new
+	fi
+	mv $DEST.new $DEST
+	rm -f $DEST.new.plain
+else
+	mv $DEST.new.plain $DEST
+	rm -f $DEST.new
+fi
+
+# Older versions did not compress the ids file, so let's make sure we
+# clean that up.
+if [ ${DEST%.gz} != ${DEST} ] ; then
+	rm -f ${DEST%.gz} ${DEST%.gz}.old
+fi
+
+${quiet} || echo "Done."