We cannot do hooks_find and then hooks_remove because it might have come

from the parent (global) tree, instead make it remove by name like options.

While here, also tidy up a few bits of options and hooks handling (use
RB_FOREACH_SAFE, and a helper function for the free).

cmd-set-hook.c

@@ -93,8 +93,7 @@ cmd_set_hook_exec(struct cmd *self, struct cmd_q *cmdq)
 			    name);
 			return (CMD_RETURN_ERROR);
 		}
-		if ((hook = hooks_find(hooks, name)) != NULL)
+		hooks_remove(hooks, name);
-			hooks_remove(hooks, hook);
 		return (CMD_RETURN_NORMAL);
 	}
 

hooks.c

@@ -32,7 +32,8 @@ static int	hooks_cmp(struct hook *, struct hook *);
 RB_PROTOTYPE(hooks_tree, hook, entry, hooks_cmp);
 RB_GENERATE(hooks_tree, hook, entry, hooks_cmp);
 
-struct hook	*hooks_find1(struct hooks *, const char *);
+static struct hook	*hooks_find1(struct hooks *, const char *);
+static void		 hooks_free1(struct hooks *, struct hook *);
 
 static int
 hooks_cmp(struct hook *hook1, struct hook *hook2)
@@ -51,13 +52,22 @@ hooks_create(struct hooks *parent)
 	return (hooks);
 }
 
+static void
+hooks_free1(struct hooks *hooks, struct hook *hook)
+{
+	RB_REMOVE(hooks_tree, &hooks->tree, hook);
+	cmd_list_free(hook->cmdlist);
+	free((char *)hook->name);
+	free(hook);
+}
+
 void
 hooks_free(struct hooks *hooks)
 {
 	struct hook	*hook, *hook1;
 
 	RB_FOREACH_SAFE(hook, hooks_tree, &hooks->tree, hook1)
-		hooks_remove(hooks, hook);
+		hooks_free1(hooks, hook);
 	free(hooks);
 }
 
@@ -79,7 +89,7 @@ hooks_add(struct hooks *hooks, const char *name, struct cmd_list *cmdlist)
 	struct hook	*hook;
 
 	if ((hook = hooks_find1(hooks, name)) != NULL)
-		hooks_remove(hooks, hook);
+		hooks_free1(hooks, hook);
 
 	hook = xcalloc(1, sizeof *hook);
 	hook->name = xstrdup(name);
@@ -89,15 +99,15 @@ hooks_add(struct hooks *hooks, const char *name, struct cmd_list *cmdlist)
 }
 
 void
-hooks_remove(struct hooks *hooks, struct hook *hook)
+hooks_remove(struct hooks *hooks, const char *name)
 {
-	RB_REMOVE(hooks_tree, &hooks->tree, hook);
+	struct hook	*hook;
-	cmd_list_free(hook->cmdlist);
+
-	free((char *) hook->name);
+	if ((hook = hooks_find1(hooks, name)) != NULL)
-	free(hook);
+		hooks_free1(hooks, hook);
 }
 
-struct hook *
+static struct hook *
 hooks_find1(struct hooks *hooks, const char *name)
 {
 	struct hook	hook;

options.c

@@ -34,11 +34,13 @@ struct options {
 	struct options	*parent;
 };
 
-int	options_cmp(struct options_entry *, struct options_entry *);
+static int	options_cmp(struct options_entry *, struct options_entry *);
 RB_PROTOTYPE(options_tree, options_entry, entry, options_cmp);
 RB_GENERATE(options_tree, options_entry, entry, options_cmp);
 
-int
+static void	options_free1(struct options *, struct options_entry *);
+
+static int
 options_cmp(struct options_entry *o1, struct options_entry *o2)
 {
 	return (strcmp(o1->name, o2->name));
@@ -55,19 +57,23 @@ options_create(struct options *parent)
 	return (oo);
 }
 
-void
+static void
-options_free(struct options *oo)
+options_free1(struct options *oo, struct options_entry *o)
 {
-	struct options_entry	*o;
-
-	while (!RB_EMPTY(&oo->tree)) {
-		o = RB_ROOT(&oo->tree);
 	RB_REMOVE(options_tree, &oo->tree, o);
-		free(o->name);
+	free((char *)o->name);
 	if (o->type == OPTIONS_STRING)
 		free(o->str);
 	free(o);
 }
+
+void
+options_free(struct options *oo)
+{
+	struct options_entry	*o, *o1;
+
+	RB_FOREACH_SAFE (o, options_tree, &oo->tree, o1)
+		options_free1(oo, o);
 	free(oo);
 }
 
@@ -113,14 +119,8 @@ options_remove(struct options *oo, const char *name)
 {
 	struct options_entry	*o;
 
-	if ((o = options_find1(oo, name)) == NULL)
+	if ((o = options_find1(oo, name)) != NULL)
-		return;
+		options_free1(oo, o);
-
-	RB_REMOVE(options_tree, &oo->tree, o);
-	free(o->name);
-	if (o->type == OPTIONS_STRING)
-		free(o->str);
-	free(o);
 }
 
 struct options_entry *

tmux.h

@@ -703,7 +703,7 @@ struct hook {
 
 /* Option data structures. */
 struct options_entry {
-	char		*name;
+	const char		*name;
 
 	enum {
 		OPTIONS_STRING,
@@ -1514,7 +1514,7 @@ struct hook	*hooks_first(struct hooks *);
 struct hook	*hooks_next(struct hook *);
 void		 hooks_add(struct hooks *, const char *, struct cmd_list *);
 void		 hooks_copy(struct hooks *, struct hooks *);
-void		 hooks_remove(struct hooks *, struct hook *);
+void		 hooks_remove(struct hooks *, const char *);
 struct hook	*hooks_find(struct hooks *, const char *);
 void		 hooks_run(struct hooks *, const char *, struct client *);