Fix: 'which' isn't available on minimal CentOS installs

fixes #10417

etc/initsystem/prepare-dirs

@@ -47,7 +47,7 @@ fi
 
 mkdir -p $ICINGA2_RUN_DIR/icinga2/cmd
 chown $ICINGA2_USER:$ICINGA2_COMMAND_GROUP $ICINGA2_RUN_DIR/icinga2/cmd
-if [ $(which restorecon) ]; then
+if which restorecon >/dev/null 2&>1; then
 	restorecon -R $ICINGA2_RUN_DIR/icinga2/
 fi
 chmod 2750 $ICINGA2_RUN_DIR/icinga2/cmd

etc/initsystem/safe-reload

@@ -1,20 +1,20 @@
 #!/bin/sh
 # load system specific defines
 SYSCONFIGFILE=$1
-if [ -f "$SYSCONFIGFILE" ]; then
-	. $SYSCONFIGFILE
-else
-	echo "Error: You need to supply the path to the Icinga2 sysconfig file as parameter."
+if [ ! -f "$SYSCONFIGFILE" ]; then
+	echo "Error: You need to supply the path to the Icinga2 sysconfig file as a parameter."
 	exit 1
 fi
 
+. $SYSCONFIGFILE
+
 printf "Validating config files: "
 
 OUTPUTFILE=`mktemp`
-if [ $(which chcon) ]; then
-        chcon -t icinga2_tmp_t $OUTPUTFILE
-fi
 
+if env chcon >/dev/null 2&>1; then
+	chcon -t icinga2_tmp_t $OUTPUTFILE
+fi
 
 if ! $DAEMON daemon --validate --color > $OUTPUTFILE; then
 	echo "Failed"
@@ -34,11 +34,10 @@ if [ ! -e $ICINGA2_PID_FILE ]; then
 fi
 
 pid=`cat $ICINGA2_PID_FILE`
-if kill -HUP $pid >/dev/null 2>&1; then
-	echo "Done"
-else
+if ! kill -HUP $pid >/dev/null 2>&1; then
 	echo "Error: Icinga not running"
 	exit 7
 fi
 
+echo "Done"
 exit 0