Dynamically manage service states based on user defined conditions

Old event system has been replaced with a more generic condition
concept. The idea is that finit plugins may provide arbitrary
conditions that services may specify as dependencies that they require
to run.

In order to accomodate this, the service management has been
redesigned to use a state machine.

cond.h

@@ -0,0 +1,36 @@
+#ifndef FINIT_COND_H_
+#define FINIT_COND_H_
+
+#include <paths.h>
+
+#define COND_PATH     _PATH_VARRUN "finit/cond"
+#define COND_SVC_PATH COND_PATH "/svc/"
+#define COND_RECONF   COND_PATH "/reconf"
+
+typedef enum cond_state {
+	COND_OFF = 0,
+	COND_FLUX,
+	COND_ON
+} cond_state_t;
+
+const char     *condstr      (enum cond_state s);
+const char     *cond_path    (const char *name);
+enum cond_state cond_get_path(const char *path);
+enum cond_state cond_get     (const char *name);
+enum cond_state cond_get_agg (const char *names);
+int             cond_affects (const char *name, const char *names);
+
+int  cond_set_path(const char *path, enum cond_state new);
+void cond_set     (const char *name);
+void cond_clear   (const char *name);
+void cond_reload  (void);
+
+#endif	/* FINIT_COND_H_ */
+
+/**
+ * Local Variables:
+ *  version-control: t
+ *  indent-tabs-mode: t
+ *  c-file-style: "linux"
+ * End:
+ */