alias_apply: change return type to bool

We can use the rbapply() return value to detect failure.

plugins/sudoers/alias.c

@@ -177,22 +177,24 @@ alias_apply_func(void *v1, void *v2)
 /*
  * Apply a function to each alias entry and pass in a cookie.
  */
-void
+bool
 alias_apply(struct sudoers_parse_tree *parse_tree,
     int (*func)(struct sudoers_parse_tree *, struct alias *, void *),
     void *cookie)
 {
     struct alias_apply_closure closure;
+    bool ret = true;
     debug_decl(alias_apply, SUDOERS_DEBUG_ALIAS);
 
     if (parse_tree->aliases != NULL) {
 	closure.parse_tree = parse_tree;
 	closure.func = func;
 	closure.cookie = cookie;
-	rbapply(parse_tree->aliases, alias_apply_func, &closure, inorder);
+	if (rbapply(parse_tree->aliases, alias_apply_func, &closure, inorder) != 0)
+	    ret = false;
     }
 
-    debug_return;
+    debug_return_bool(ret);
 }
 
 /*

plugins/sudoers/check_aliases.c

@@ -179,8 +179,10 @@ check_aliases(struct sudoers_parse_tree *parse_tree, bool strict, bool quiet,
     free_aliases(used_aliases);
 
     /* If all aliases were referenced we will have an empty tree. */
-    if (!no_aliases(parse_tree))
-	alias_apply(parse_tree, cb_unused, &quiet);
+    if (!no_aliases(parse_tree)) {
+	if (!alias_apply(parse_tree, cb_unused, &quiet))
+	    errors++;
+    }
 
     debug_return_int(strict ? errors : 0);
 }

plugins/sudoers/cvtsudoers.c

@@ -98,7 +98,7 @@ static unsigned int cvtsudoers_parse_suppression(char *expression);
 static void filter_userspecs(struct sudoers_parse_tree *parse_tree, struct cvtsudoers_config *conf);
 static void filter_defaults(struct sudoers_parse_tree *parse_tree, struct cvtsudoers_config *conf);
 static void alias_remove_unused(struct sudoers_parse_tree *parse_tree);
-static void alias_prune(struct sudoers_parse_tree *parse_tree, struct cvtsudoers_config *conf);
+static bool alias_prune(struct sudoers_parse_tree *parse_tree, struct cvtsudoers_config *conf);
 sudo_noreturn static void help(void);
 sudo_noreturn static void usage(void);
 
@@ -1078,9 +1078,7 @@ print_aliases_sudoers(struct sudoers_parse_tree *parse_tree,
 {
     debug_decl(print_aliases_sudoers, SUDOERS_DEBUG_UTIL);
 
-    alias_apply(parse_tree, print_alias_sudoers, lbuf);
-
-    debug_return_bool(!sudo_lbuf_error(lbuf));
+    debug_return_bool(alias_apply(parse_tree, print_alias_sudoers, lbuf));
 }
 
 static FILE *output_fp;		/* global for convert_sudoers_output */
@@ -1432,15 +1430,13 @@ alias_prune_helper(struct sudoers_parse_tree *parse_tree, struct alias *a,
 /*
  * Prune out non-matching entries from within aliases.
  */
-static void
+static bool
 alias_prune(struct sudoers_parse_tree *parse_tree,
     struct cvtsudoers_config *conf)
 {
     debug_decl(alias_prune, SUDOERS_DEBUG_ALIAS);
 
-    alias_apply(parse_tree, alias_prune_helper, conf);
-
-    debug_return;
+    debug_return_bool(alias_apply(parse_tree, alias_prune_helper, conf));
 }
 
 /*

plugins/sudoers/cvtsudoers_csv.c

@@ -388,13 +388,13 @@ print_alias_csv(struct sudoers_parse_tree *parse_tree, struct alias *a, void *v)
     title = alias_type_to_string(a->type);
     if (title == NULL) {
         sudo_warnx("unexpected alias type %d", a->type);
-	debug_return_int(0);
+	debug_return_int(-1);
     }
 
     fprintf(fp, "%s,%s,", title, a->name);
     print_member_list_csv(fp, parse_tree, &a->members, false, a->type, false);
     putc('\n', fp);
-    debug_return_int(0);
+    debug_return_int(ferror(fp));
 }
 
 /*
@@ -403,6 +403,7 @@ print_alias_csv(struct sudoers_parse_tree *parse_tree, struct alias *a, void *v)
 static bool
 print_aliases_csv(FILE *fp, const struct sudoers_parse_tree *parse_tree)
 {
+    bool ret;
     debug_decl(print_aliases_csv, SUDOERS_DEBUG_UTIL);
 
     if (TAILQ_EMPTY(&parse_tree->defaults))
@@ -412,10 +413,13 @@ print_aliases_csv(FILE *fp, const struct sudoers_parse_tree *parse_tree)
     fputs("alias_type,alias_name,members\n", fp);
 
     /* print_alias_csv() does not modify parse_tree. */
-    alias_apply((struct sudoers_parse_tree *)parse_tree, print_alias_csv, fp);
+    ret = alias_apply((struct sudoers_parse_tree *)parse_tree,
+	print_alias_csv, fp);
     putc('\n', fp);
+    if (ferror(fp))
+	ret = false;
 
-    debug_return_bool(true);
+    debug_return_bool(ret);
 }
 
 /*

plugins/sudoers/parse.h

@@ -388,7 +388,7 @@ const char *alias_type_to_string(short alias_type);
 struct alias *alias_get(const struct sudoers_parse_tree *parse_tree, const char *name, short type);
 struct alias *alias_remove(struct sudoers_parse_tree *parse_tree, const char *name, short type);
 bool alias_find_used(struct sudoers_parse_tree *parse_tree, struct rbtree *used_aliases);
-void alias_apply(struct sudoers_parse_tree *parse_tree, int (*func)(struct sudoers_parse_tree *, struct alias *, void *), void *cookie);
+bool alias_apply(struct sudoers_parse_tree *parse_tree, int (*func)(struct sudoers_parse_tree *, struct alias *, void *), void *cookie);
 void alias_free(void *a);
 void alias_put(struct alias *a);
 

plugins/sudoers/testsudoers.c

@@ -715,9 +715,7 @@ print_aliases(struct sudo_lbuf *lbuf)
 {
     debug_decl(print_aliases, SUDOERS_DEBUG_UTIL);
 
-    alias_apply(&parsed_policy, print_alias, lbuf);
-
-    debug_return_bool(!sudo_lbuf_error(lbuf));
+    debug_return_bool(alias_apply(&parsed_policy, print_alias, lbuf));
 }
 
 static void