vm: Parse all options from when downloading updates (#348)

Collect options and pkg names to separate variables and check if any pkg name
was given, not any argument.

common/qubes_download_dom0_updates.sh

@@ -4,14 +4,23 @@ DOM0_UPDATES_DIR=/var/lib/qubes/dom0-updates
 
 DOIT=0
 GUI=1
+OPTS=
+PKGLIST=
 while [ -n "$1" ]; do
-    if [ "x--doit" = "x$1" ]; then
+    case "$1" in
+        --doit)
             DOIT=1
-    elif [ "x--nogui" = "x$1" ]; then
+            ;;
+        --nogui)
             GUI=0
-    else
+            ;;
-        break
+        -*)
-    fi
+            OPTS="$OPTS $1"
+            ;;
+        *)
+            PKGLIST="$PKGLIST $1"
+            ;;
+    esac
     shift
 done
 
@@ -23,11 +32,9 @@ fi
 mkdir -p $DOM0_UPDATES_DIR/etc
 cp /etc/yum.conf $DOM0_UPDATES_DIR/etc/
 
-PKGLIST="$*"
-
 if [ "x$PKGLIST" = "x" ]; then
     echo "Checking for dom0 updates..."
-    PKGLIST=`yum --installroot $DOM0_UPDATES_DIR check-update -q | cut -f 1 -d ' '`
+    PKGLIST=`yum --installroot $DOM0_UPDATES_DIR $OPTS check-update -q | cut -f 1 -d ' '`
 else
     PKGS_FROM_CMDLINE=1
 fi
@@ -44,7 +51,7 @@ if [ "$DOIT" != "1" -a "$PKGS_FROM_CMDLINE" != "1" ]; then
 fi
 
 if [ "$PKGS_FROM_CMDLINE" == 1 ]; then
-    OPTS="--resolve"
+    OPTS="$OPTS --resolve"
     GUI=0
 fi