vpnc-script: hide EROFS for ip route flush cache

Inside a container, running 'ip route flush cache' can spam with
"ip: can't open '/proc/sys/net/ipv4/route/flush': Read-only file system"

Hide that the error output for that command.

Signed-off-by: Robin H. Johnson <robbat2@gentoo.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

diff --git a/vpnc-script b/vpnc-script
index 3cde5feb6be98a2936ff6ffac74fa5a3293ffbd2..dafd10ce63b0d2ed4926b56cb517196f17906790 100755 (executable)
--- a/vpnc-script
+++ b/vpnc-script
@@ -230,18 +230,18 @@ if [ -n "$IPROUTE" ]; then
 
        set_vpngateway_route() {
                $IPROUTE route add `$IPROUTE route get "$VPNGATEWAY" | fix_ip_get_output`
-               $IPROUTE route flush cache
+               $IPROUTE route flush cache 2>/dev/null
        }
 
        del_vpngateway_route() {
                $IPROUTE route $route_syntax_del "$VPNGATEWAY"
-               $IPROUTE route flush cache
+               $IPROUTE route flush cache 2>/dev/null
        }
 
        set_default_route() {
                $IPROUTE route | grep '^default' | fix_ip_get_output > "$DEFAULT_ROUTE_FILE"
                $IPROUTE route replace default dev "$TUNDEV"
-               $IPROUTE route flush cache
+               $IPROUTE route flush cache 2>/dev/null
        }
 
        set_network_route() {
@@ -255,7 +255,7 @@ if [ -n "$IPROUTE" ]; then
                else
                        $IPROUTE route replace "$NETWORK/$NETMASKLEN" dev "$NETDEV"
                fi
-               $IPROUTE route flush cache
+               $IPROUTE route flush cache 2>/dev/null
        }
 
        set_exclude_route() {
@@ -265,7 +265,7 @@ if [ -n "$IPROUTE" ]; then
                NETMASK="$2"
                NETMASKLEN="$3"
                $IPROUTE route add `$IPROUTE route get "$NETWORK/$NETMASKLEN" | fix_ip_get_output`
-               $IPROUTE route flush cache
+               $IPROUTE route flush cache 2>/dev/null
        }
 
        del_exclude_route() {
@@ -275,13 +275,13 @@ if [ -n "$IPROUTE" ]; then
                NETMASK="$2"
                NETMASKLEN="$3"
                $IPROUTE route $route_syntax_del "$NETWORK/$NETMASKLEN"
-               $IPROUTE route flush cache
+               $IPROUTE route flush cache 2>/dev/null
        }
 
        reset_default_route() {
                if [ -s "$DEFAULT_ROUTE_FILE" ]; then
                        $IPROUTE route replace `cat "$DEFAULT_ROUTE_FILE"`
-                       $IPROUTE route flush cache
+                       $IPROUTE route flush cache 2>/dev/null
                        rm -f -- "$DEFAULT_ROUTE_FILE"
                fi
        }
@@ -292,13 +292,13 @@ if [ -n "$IPROUTE" ]; then
                NETMASKLEN="$3"
                NETDEV="$4"
                $IPROUTE route $route_syntax_del "$NETWORK/$NETMASKLEN" dev "$NETDEV"
-               $IPROUTE route flush cache
+               $IPROUTE route flush cache 2>/dev/null
        }
 
        set_ipv6_default_route() {
                # We don't save/restore IPv6 default route; just add a higher-priority one.
                $IPROUTE -6 route add default dev "$TUNDEV" metric 1
-               $IPROUTE -6 route flush cache
+               $IPROUTE -6 route flush cache 2>/dev/null
        }
 
        set_ipv6_network_route() {
@@ -311,7 +311,7 @@ if [ -n "$IPROUTE" ]; then
                else
                        $IPROUTE -6 route replace "$NETWORK/$NETMASKLEN" dev "$NETDEV"
                fi
-               $IPROUTE route flush cache
+               $IPROUTE route flush cache 2>/dev/null
        }
 
        set_ipv6_exclude_route() {
@@ -320,12 +320,12 @@ if [ -n "$IPROUTE" ]; then
                NETWORK="$1"
                NETMASKLEN="$2"
                $IPROUTE -6 route add `$IPROUTE route get "$NETWORK/$NETMASKLEN" | fix_ip_get_output`
-               $IPROUTE route flush cache
+               $IPROUTE route flush cache 2>/dev/null
        }
 
        reset_ipv6_default_route() {
                $IPROUTE -6 route del default dev "$TUNDEV"
-               $IPROUTE route flush cache
+               $IPROUTE route flush cache 2>/dev/null
        }
 
        del_ipv6_network_route() {
@@ -333,7 +333,7 @@ if [ -n "$IPROUTE" ]; then
                NETMASKLEN="$2"
                NETDEV="$3"
                $IPROUTE -6 route del "$NETWORK/$NETMASKLEN" dev "$NETDEV"
-               $IPROUTE -6 route flush cache
+               $IPROUTE -6 route flush cache 2>/dev/null
        }
 
        del_ipv6_exclude_route() {
@@ -342,7 +342,7 @@ if [ -n "$IPROUTE" ]; then
                NETWORK="$1"
                NETMASKLEN="$2"
                $IPROUTE -6 route del "$NETWORK/$NETMASKLEN"
-               $IPROUTE -6 route flush cache
+               $IPROUTE -6 route flush cache 2>/dev/null
        }
 else # use route command
        get_default_gw() {