batmand: Convert to procd based init script

The legacy init script had various problems in comparison with procd based
init scripts. It wasn't able to correctly track the running process
instance and thus could:

* accidentally kill another (non init controlled) daemon instance when stop
  is used
* not restart the daemon depending on config changes when reload is used

The information about a running instance and its parameters can now be
handled by a global controller (procd). The process must not fork anymore
and leave the control to procd. The process with its parameters can then be
used by procd to trigger the stop/start of the process at the right time.

Signed-off-by: Sven Eckelmann <sven@narfation.org>

batmand/Makefile

@@ -14,7 +14,7 @@ PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL:=https://git.open-mesh.org/batmand.git
 PKG_REV:=b67a7087b51d7a5e90d27ac39116d1f57257c86e
 PKG_VERSION:=1440
-PKG_RELEASE:=0
+PKG_RELEASE:=1
 PKG_LICENSE:=GPL-2.0
 
 PKG_SOURCE_VERSION:=$(PKG_REV)

batmand/files/etc/init.d/batmand

@@ -1,21 +1,39 @@
 #!/bin/sh /etc/rc.common
 START=90
+USE_PROCD=1
 
-start () {
-	interface=$(uci get batmand.general.interface)
+batmand_start() {
+	local config="$1"
+	local batman_args
+	local interface
+	local hnas
+	local gateway_class
+	local originator_interval
+	local preferred_gateway
+	local routing_class
+	local visualisation_srv
+	local local policy_routing_script
+	local disable_client_nat
+	local disable_aggregation
+
+	[ "$config" = "general" ] || return 1
+
+	config_get interface "$config" interface
 	if [ "$interface" = "" ]; then
 		echo $1 Error, you must specify at least a network interface
-		exit
+		return 1
 	fi
-	hnas=$(uci get batmand.general.hna)
-	gateway_class=$(uci get batmand.general.gateway_class)
-	originator_interval=$(uci get batmand.general.originator_interval)
-	preferred_gateway=$(uci get batmand.general.preferred_gateway)
-	routing_class=$(uci get batmand.general.routing_class)
-	visualisation_srv=$(uci get batmand.general.visualisation_srv)
-	policy_routing_script=$(uci get batmand.general.policy_routing_script)
-	disable_client_nat=$(uci get batmand.general.disable_client_nat)
-	disable_aggregation=$(uci get batmand.general.disable_aggregation)
+
+	config_get hnas "$config" hna
+	config_get gateway_class "$config" gateway_class
+	config_get originator_interval "$config" originator_interval
+	config_get preferred_gateway "$config" preferred_gateway
+	config_get routing_class "$config" routing_class
+	config_get visualisation_srv "$config" visualisation_srv
+	config_get policy_routing_script "$config" policy_routing_script
+	config_get disable_client_nat "$config" disable_client_nat
+	config_get disable_aggregation "$config" disable_aggregation
+
 	batman_args=""
 
 	for hna in $hnas; do
@@ -54,10 +72,20 @@ start () {
 		batman_args=${batman_args}'--disable-aggregation '
 	fi
 
-	batman_args=${batman_args}$interface
-	batmand $batman_args >/dev/null 2>&1
+	procd_open_instance "${config}"
+	procd_set_param command /usr/sbin/batmand
+	procd_append_param command --no-detach
+	procd_append_param command ${batman_args}
+	procd_append_param command ${interface}
+	procd_set_param netdev ${interface}
+	procd_close_instance
 }
 
-stop () {
-	killall batmand
+start_service() {
+	config_load "batmand"
+	config_foreach batmand_start batmand
+}
+
+service_triggers() {
+	procd_add_reload_trigger "batmand"
 }

batmand/patches/0001-Allow-one-to-disable-forking-to-background-in-debug_.patch

@@ -0,0 +1,68 @@
+From: Sven Eckelmann <sven@narfation.org>
+Date: Sun, 1 Dec 2013 14:39:00 +0100
+Subject: Allow one to disable forking to background in debug_mode 0
+
+---
+ posix/init.c | 19 ++++++++++++++-----
+ 1 file changed, 14 insertions(+), 5 deletions(-)
+
+diff --git a/posix/init.c b/posix/init.c
+index afd409f..901c65a 100644
+--- a/posix/init.c
++++ b/posix/init.c
+@@ -44,6 +44,7 @@
+ #define IOCSETDEV 1
+ 
+ int8_t stop;
++int no_detach = 0;
+ 
+ 
+ 
+@@ -159,6 +160,7 @@ void apply_init_args( int argc, char *argv[] ) {
+ 		{"purge-timeout",     required_argument,       0, 'q'},
+ 		{"disable-aggregation",     no_argument,       0, 'x'},
+ 		{"disable-client-nat",     no_argument,       0, 'z'},
++		{"no-detach",     no_argument,       0, 'D'},
+ 		{0, 0, 0, 0}
+ 	};
+ 
+@@ -166,7 +168,7 @@ void apply_init_args( int argc, char *argv[] ) {
+ 	stop = 0;
+ 	prog_name = argv[0];
+ 
+-	while ( ( optchar = getopt_long( argc, argv, "a:A:bcd:hHio:g:p:r:s:vV", long_options, &option_index ) ) != -1 ) {
++	while ( ( optchar = getopt_long( argc, argv, "a:A:bcd:hHio:g:p:r:s:vVD", long_options, &option_index ) ) != -1 ) {
+ 
+ 		switch ( optchar ) {
+ 
+@@ -378,6 +380,11 @@ void apply_init_args( int argc, char *argv[] ) {
+ 				found_args++;
+ 				break;
+ 
++			case 'D':
++				no_detach = 1;
++				found_args++;
++				break;
++
+ 			case 'h':
+ 			default:
+ 				usage();
+@@ -536,12 +543,14 @@ void apply_init_args( int argc, char *argv[] ) {
+ 		/* daemonize */
+ 		if (debug_level == 0) {
+ 
+-			if (my_daemon() < 0) {
++			if (!no_detach) {
++				if (my_daemon() < 0) {
+ 
+-				printf("Error - can't fork to background: %s\n", strerror(errno));
+-				restore_defaults();
+-				exit(EXIT_FAILURE);
++					printf("Error - can't fork to background: %s\n", strerror(errno));
++					restore_defaults();
++					exit(EXIT_FAILURE);
+ 
++				}
+ 			}
+ 
+ 			openlog("batmand", LOG_PID, LOG_DAEMON);