Add support for one-shot conditions, like most hooks

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

src/cond-w.c

@@ -59,9 +59,27 @@ static void cond_bump_reconf(void)
 	cond_set_gen(COND_RECONF, rgen);
 }
 
-int cond_set_path(const char *path, enum cond_state new)
+static int cond_checkpath(const char *path)
 {
 	char buf[MAX_ARG_LEN], *dir;
+
+	strlcpy(buf, path, sizeof(buf));
+	dir = dirname(buf);
+	if (!dir) {
+		_e("Invalid path '%s' for condition", path);
+		return 1;
+	}
+
+	if (makepath(dir) && errno != EEXIST) {
+		_pe("Failed creating dir '%s' for condition '%s'", dir, path);
+		return 1;
+	}
+
+	return 0;
+}
+
+int cond_set_path(const char *path, enum cond_state new)
+{
 	enum cond_state old;
 	unsigned int rgen;
 
@@ -77,16 +95,8 @@ int cond_set_path(const char *path, enum cond_state new)
 
 	switch (new) {
 	case COND_ON:
-		strlcpy(buf, path, sizeof(buf));
+		if (cond_checkpath(path))
-		dir = dirname(buf);
+		    return 0;
-		if (!dir) {
-			_e("Invalid path '%s' for condition", path);
-			return 0;
-		}
-		if (makepath(dir) && errno != EEXIST) {
-			_pe("Failed creating dir '%s' for condition '%s'", dir, path);
-			return 0;
-		}
 		cond_set_gen(path, rgen);
 		break;
 
@@ -145,6 +155,18 @@ void cond_set(const char *name)
 	cond_update(name);
 }
 
+void cond_set_oneshot(const char *name)
+{
+	const char *path = cond_path(name);
+
+	_d("s => %s", name, path);
+	if (cond_checkpath(path))
+		return;
+
+	symlink(COND_RECONF, path);
+	cond_update(name);
+}
+
 void cond_clear(const char *name)
 {
 	_d("%s", name);

src/cond.h

@@ -21,12 +21,13 @@ 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);
+int  cond_set_path    (const char *path, enum cond_state new);
-void cond_set     (const char *name);
+void cond_set         (const char *name);
-void cond_clear   (const char *name);
+void cond_set_oneshot (const char *name);
-void cond_reload  (void);
+void cond_clear       (const char *name);
-void cond_reassert(const char *pat);
+void cond_reload      (void);
-void cond_init    (void);
+void cond_reassert    (const char *pat);
+void cond_init        (void);
 
 #endif	/* FINIT_COND_H_ */