From e939f4947587959d6082b7b4e404477ed950f86e Mon Sep 17 00:00:00 2001
From: torben
Date: Thu, 24 Mar 2016 16:30:57 +0100
Subject: Tidy up.

---
 dev-tools/debugging-tools/network.functions | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 dev-tools/debugging-tools/network.functions

(limited to 'dev-tools/debugging-tools/network.functions')

diff --git a/dev-tools/debugging-tools/network.functions b/dev-tools/debugging-tools/network.functions
new file mode 100644
index 00000000..89ca5a20
--- /dev/null
+++ b/dev-tools/debugging-tools/network.functions
@@ -0,0 +1,23 @@
+wait_for_iface() {
+    local DEVICE=$1
+    local TIMEOUT=10
+    echo -n "Waiting for interface $DEVICE: "
+    # Some systems don't have operstate. Seems to be hardware dependent
+    [ ! -e "/sys/class/net/${DEVICE}/operstate" ] && usleep 10000
+    if [ -e "/sys/class/net/${DEVICE}/operstate" ]; then
+        while true; do
+            # check linkstate
+            [ "x$(cat "/sys/class/net/${DEVICE}/operstate")" == "xup" ] && break
+            TIMEOUT=$(( $TIMEOUT - 1 )) # don't wait forever, the pcnet iface of vmware will never be "up" although it's working
+            [ "$TIMEOUT" -le 0 ] && break
+            # else
+            echo -n "."
+            usleep 500000
+        done
+    else
+        # we really don't have a operstate .. then just wait a sec and hope for the best.
+        sleep 1
+    fi
+    echo ".$(cat "/sys/class/net/${DEVICE}/operstate" 2>/dev/null)"
+}
+true
-- 
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