update-pciids: Add support for xz compression

[pciutils.git] / update-pciids.sh

diff --git a/update-pciids.sh b/update-pciids.sh
index 42faeea13a5af27193669b58dbc8e30ba3fe9c43..32633394a28bebdde61aa7338638db6a444b42e9 100755 (executable)
--- a/update-pciids.sh
+++ b/update-pciids.sh
@@ -20,23 +20,26 @@ if [ "$PCI_COMPRESSED_IDS" = 1 ] ; then
        DECOMP="cat"
        SRC="$SRC.gz"
        GREP=zgrep
-elif which bzip2 >/dev/null 2>&1 ; then
+elif 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 which gzip >/dev/null 2>&1 ; then
+elif command -v gzip >/dev/null 2>&1 ; then
        DECOMP="gzip -d"
        SRC="$SRC.gz"
 else
        DECOMP="cat"
 fi
 
-if which curl >/dev/null 2>&1 ; then
+if command -v curl >/dev/null 2>&1 ; then
        DL="curl -o $DEST.new $SRC"
        ${quiet} && DL="$DL -s -S"
-elif which wget >/dev/null 2>&1 ; then
+elif command -v wget >/dev/null 2>&1 ; then
        DL="wget --no-timestamping -O $DEST.new $SRC"
        ${quiet} && DL="$DL -q"
-elif which lynx >/dev/null 2>&1 ; then
+elif command -v lynx >/dev/null 2>&1 ; then
        DL="eval lynx -source $SRC >$DEST.new"
 else
        echo >&2 "update-pciids: cannot find curl, wget or lynx"
@@ -60,7 +63,7 @@ if ! $GREP >/dev/null "^C " $DEST.neww ; then
 fi
 
 if [ -f $DEST ] ; then
-       mv $DEST $DEST.old
+       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.neww 2>/dev/null || true
 fi