plugins: fix possible ordering bug; pidfile --> bootmisc

The recently updated pidfile plugin now also watches the subdirectories
in /var/run, but for that to work it must witness the creation of these
subdirectories.  The bootmisc plugin creates several, e.g., /run/quagga/
in which PID files like zebra.pid are created.

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>

plugins/bootmisc.c

@@ -116,8 +116,10 @@ static void setup(void *arg)
 		_d("System with new /run tmpfs ...");
 		makedir("/run/lock",       1777);
 		symlink("/run/lock", "/var/lock");
-		symlink("/run",      "/var/run");
 		symlink("/dev/shm",  "/run/shm");
+
+		/* compat only, should really be set up by OS/dist */
+		symlink("/run",      "/var/run");
 	} else {
 		makedir("/var/lock",       1777);
 		makedir("/var/run",        0755);
@@ -191,6 +193,7 @@ static plugin_t plugin = {
 	.hook[HOOK_BASEFS_UP] = {
 		.cb  = setup
 	},
+	.depends = { "pidfile" },
 };
 
 PLUGIN_INIT(plugin_init)

plugins/pidfile.c

@@ -314,8 +314,18 @@ static void pidfile_init(void *arg)
 static struct context pidfile_ctx;
 
 /*
- * We require /var/run to be set up before calling pidfile_init(),
- * so the bootmisc plugin must run first.
+ * When performing an `initctl reload` with one (unchanged) service
+ * depending on, e.g. `net/iface/lo`, its condition will not be set
+ * to ON by the pidfile plugin unless the netlink plugin hook runs
+ * first.
+ *
+ * Example:
+ *
+ *     service <net/iface/lo> /sbin/dropbear ...
+ *
+ * Which provides the <svc/sbin/dropbear> condition, will not be
+ * set by pidfile.so during `initctl reload` because dropbear is
+ * still SIGSTP:ed waiting for <net/iface/lo>.
  */
 static plugin_t plugin = {
 	.name = __FILE__,
@@ -325,7 +335,7 @@ static plugin_t plugin = {
 		.cb    = pidfile_callback,
 		.flags = PLUGIN_IO_READ,
 	},
-	.depends = { "bootmisc", "netlink" },
+	.depends = { "netlink" },
 };
 
 PLUGIN_INIT(plugin_init)