From e3be62b96a20f39ca9e271c5e7f6fa901c4142e7 Mon Sep 17 00:00:00 2001
From: Valentin Niess <niess@in2p3.fr>
Date: Thu, 13 Dec 2018 14:45:48 +0000
Subject: [PATCH] Use `ip addr` when `ifconfig` is missing

---
 acroread | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/acroread b/acroread
index abf416d..c723b1b 100755
--- a/acroread
+++ b/acroread
@@ -2,6 +2,7 @@
 main() {
     local document="${1}"
     local file
+    local ipaddr
 
     if [[ -z "${document}" ]]; then
         document="${HOME}/Documents"
@@ -13,13 +14,19 @@ main() {
         fi
     fi
 
+    if [[ $(type -p "ifconfig") ]]; then
+        ipaddr="ifconfig"
+    else
+        ipaddr="ip addr show dev"
+    fi
+
     docker run --rm -v "${document}:/home/acroread/Documents:rw" \
 		-v /tmp/.X11-unix:/tmp/.X11-unix \
 		-v /var/run/cups:/var/run/cups:ro \
 		-e uid="$(id -u)" \
 		-e gid="$(id -g)" \
 		-e DISPLAY="unix${DISPLAY}" \
-		-e CUPS_SERVER="$(ifconfig docker0 | awk '/^[ ]+inet / {print $2}')" \
+		-e CUPS_SERVER="$(${ipaddr} docker0 | awk '/^[ ]+inet / {print $2}')" \
 		-e FILE="${file}" \
 		--name acroread \
 		mgor/acroread >& /dev/null