From 31dfe057f9b5667991f3c7809a13a87485f32ac6 Mon Sep 17 00:00:00 2001
From: Erich Eckner <git@eckner.net>
Date: Tue, 6 Feb 2018 20:52:56 +0100
Subject: bin/ping-from-slave new

---
 bin/ping-from-slave     | 11 +++++++++++
 bin/slave-build-connect |  7 ++++---
 2 files changed, 15 insertions(+), 3 deletions(-)
 create mode 100755 bin/ping-from-slave

diff --git a/bin/ping-from-slave b/bin/ping-from-slave
new file mode 100755
index 0000000..4013269
--- /dev/null
+++ b/bin/ping-from-slave
@@ -0,0 +1,11 @@
+#!/bin/sh
+
+# should be called periodically on the build-master from the slaves to
+#  - report any update on the build process
+#  - show that the build is still running
+#  - get notified by the build master if the build is not necessary anymore
+
+# shellcheck source=conf/default.conf
+. "${0%/*}/../conf/default.conf"
+
+# TODO: acutally do something here :-)
diff --git a/bin/slave-build-connect b/bin/slave-build-connect
index 2ca72a3..119592e 100755
--- a/bin/slave-build-connect
+++ b/bin/slave-build-connect
@@ -3,11 +3,12 @@
 # shellcheck source=conf/default.conf
 . "${0%/*}/../conf/default.conf"
 
-if [ "${SSH_ORIGINAL_COMMAND%% *}" = "get-assignment" ] || \
-  [ "${SSH_ORIGINAL_COMMAND%% *}" = "return-assignment" ]; then
+if [ "x${SSH_ORIGINAL_COMMAND%% *}" = 'xget-assignment' ] || \
+  [ "x${SSH_ORIGINAL_COMMAND%% *}" = 'xreturn-assignment' ] || \
+  [ "x${SSH_ORIGINAL_COMMAND%% *}" = 'xping-from-slave' ]; then
 
   # small check to prevent some shell-injections
-  if echo "${SSH_ORIGINAL_COMMAND}" | \
+  if printf '%s\n' "${SSH_ORIGINAL_COMMAND}" | \
     grep -q '[^-a-zA-Z0-9.+_ ]'; then
 
     >&2 printf 'Invalid command: "%s".\n' "${SSH_ORIGINAL_COMMAND}"
-- 
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