From 962ef0d415dfc0bb7df16299655072d6e915cd89 Mon Sep 17 00:00:00 2001
From: Ariadne Conill <ariadne@dereferenced.org>
Date: Tue, 18 Aug 2020 15:57:01 -0600
Subject: [PATCH] link: support `mtu` parameter (like debian)

---
 executor-scripts/linux/link | 6 +++++-
 tests/linux/link_test       | 8 +++++++-
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/executor-scripts/linux/link b/executor-scripts/linux/link
index 8bb9d62..2aafd67 100755
--- a/executor-scripts/linux/link
+++ b/executor-scripts/linux/link
@@ -1,5 +1,9 @@
 #!/bin/sh
 [ -z "$VERBOSE" ] || set -x
+OPTIONS=""
 case "$PHASE" in
-up|down)	${MOCK} ip link set $PHASE dev $IFACE ;;
+up|down)
+	[ -n "$IF_MTU" ] && OPTIONS="$OPTIONS mtu $IF_MTU"
+	${MOCK} ip link set $PHASE dev $IFACE $OPTIONS
+	;;
 esac
diff --git a/tests/linux/link_test b/tests/linux/link_test
index 6957224..717d462 100755
--- a/tests/linux/link_test
+++ b/tests/linux/link_test
@@ -3,7 +3,7 @@
 . $(atf_get_srcdir)/../test_env.sh
 EXECUTOR="$(atf_get_srcdir)/../../executor-scripts/linux/link"
 
-tests_init up down
+tests_init up down mtu
 
 up_body() {
 	export IFACE=lo PHASE=up MOCK=echo
@@ -16,3 +16,9 @@ down_body() {
 	atf_check -s exit:0 -o match:'ip link set down dev lo' \
 		${EXECUTOR}
 }
+
+mtu_body() {
+	export IFACE=eth0 PHASE=up MOCK=echo IF_MTU=1492
+	atf_check -s exit:0 -o match:'ip link set up dev eth0 mtu 1492' \
+		${EXECUTOR}
+}