Fix I/O plugin watcher, load plugins earlier to enable a new early hook!

Restructure start by calling the plugin loader earlier. This makes it
possible to run hooks even earlier.  This also adds a new hook:
HOOK_ROOTFS_UP which runs as soon as the system root (/) is available.

Another very notable change is the slow refactor of helpers.c into a finit
helper library called libite.so (-lite). This is a light-weight

Also, lots of misc. fixes all over the place. Signal handling still really
needs to be looked into once more!

Makefile:
        Add dependency handling for parallell build
        Add libite library

ChangeLog:
        Update with new 1.4 release. There is a lot of fixes!

libite/:
        Collection of utility functions and C library extensions for
        finit & its plugins

reboot.c:
        New reboot tool. Simply sends SIGINT to PID 1

finit.h:
        Cleanup old LISTEN_INITCTL define, code is in an optional plugin now

finit.c:
        Let mdev/udev run *after* cls()
        Add useful debug statement for /proc/cmdline
        Earlier plugin load => new early hook point
        Show OK/FAIL for total plugin load, not for each plugin => speedup

helpers.h:
        Rename syslog macros to prevent common name clashes (DEBUG/ERROR)
        Add __FILE__ to _e(), _d() and _pe() macros

helpers.c:
        In ifconfig() the addr and mask arguments are now optional
        The copyfile() has been moved to libite.so
        Temporarily remove const directive from some functions to build
        Use DFLSIG() macro in run_getty() to simplify code

plugin.h:
        Add new HOOK_ROOTFS_UP hook

plugin.c:
        Fix init_plugins() to actually register the plugin's I/O fd
        Skip verbose listing of all plugins in plugin_load_all()

svc.c:
        svc_start(): Dito

plugins/Makefile:
        Inherit CFLAGS and LDFLAGS, but make sure to filter out -rdynamic
        from LDFLAGS, it's used by the daemon, only

plugins/initctl.c:
        New includes after helpers.h refactor

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

finit.c

@@ -49,6 +49,7 @@ static void parse_kernel_cmdline(void)
 
 	if ((fp = fopen("/proc/cmdline", "r")) != NULL) {
 		fgets(line, sizeof(line), fp);
+		_d("Kernel command line: %s", line);
 
 		if (strstr(line, "finit_debug") || strstr(line, "--debug"))
 			debug = 1;
@@ -91,15 +92,6 @@ int main(int UNUSED(args), char *argv[])
 	mount("none", "/dev/shm", "tmpfs", 0, NULL);
 	umask(022);
 
-	/*
-	 * Populate /dev and prepare for runtime events from kernel.
-	 */
-#if defined(USE_UDEV)
-	run_interactive("udevd --daemon", "Populating device tree");
-#elif defined (MDEV)
-	run_interactive(MDEV "-s", "Populating device tree");
-#endif
-
 	/*
 	 * Parse kernel parameters
 	 */
@@ -108,11 +100,28 @@ int main(int UNUSED(args), char *argv[])
 	cls();
 	echo("finit " VERSION " (built " __DATE__ " " __TIME__ " by " WHOAMI ")");
 
+	/*
+	 * Populate /dev and prepare for runtime events from kernel.
+	 */
+#if defined(USE_UDEV)
+	run_interactive("udevd --daemon", "Populating device tree");
+#elif defined (MDEV)
+	run_interactive(MDEV " -s", "Populating device tree");
+#endif
+
 	/*
 	 * Parse configuration file
 	 */
 	parse_finit_conf(FINIT_CONF);
 
+	/*
+	 * Load plugins.  Must run after finit.conf has registered
+	 * all services, or service plugins won't have anything to
+	 * hook on to.
+	 */
+	print_desc("", "Loading plugins");
+	print_result(plugin_load_all(PLUGIN_PATH));
+
 	/*
 	 * Mount filesystems
 	 */
@@ -124,6 +133,9 @@ int main(int UNUSED(args), char *argv[])
 #ifdef SYSROOT
 	run(SYSROOT, "/", NULL, MS_MOVE, NULL);
 #endif
+	_d("Root FS up, calling hooks ...");
+	plugin_run_hooks(HOOK_ROOTFS_UP);
+
 	umask(0);
 	run("/bin/mount -na");
 	run("/sbin/swapon -ea");
@@ -137,13 +149,7 @@ int main(int UNUSED(args), char *argv[])
 	 */
 	sig_setup();
 
-	/*
-	 * Load plugins and run first level hooks.
-	 */
-	_d("Loading plugins ...");
-	plugin_load_all(PLUGIN_PATH);
-
-	_d("Running first level hooks ...");
+	_d("Base FS up, calling hooks ...");
 	plugin_run_hooks(HOOK_BASEFS_UP);
 
 	/*