X-Git-Url: http://git.archive.openwrt.org/?p=project%2Flibubox.git;a=blobdiff_plain;f=json_script.c;h=87b1d71b1837168e7a6aa55163b41084c79e7455;hp=7cef481b64f5618f7eb53f0f440428d0f0b0322b;hb=3aad2948ebceef7865a5cf749522bed9e332de05;hpb=10429bccd0dc5d204635e110a7a8fae7b80d16cb

diff --git a/json_script.c b/json_script.c
index 7cef481..87b1d71 100644
--- a/json_script.c
+++ b/json_script.c
@@ -32,6 +32,7 @@ struct json_handler {
 
 static int json_process_expr(struct json_call *call, struct blob_attr *cur);
 static int json_process_cmd(struct json_call *call, struct blob_attr *cur);
+static int eval_string(struct json_call *call, struct blob_buf *buf, const char *name, const char *pattern);
 
 struct json_script_file *
 json_script_file_from_blobmsg(const char *name, void *data, int len)
@@ -44,6 +45,9 @@ json_script_file_from_blobmsg(const char *name, void *data, int len)
 		name_len = strlen(name) + 1;
 
 	f = calloc_a(sizeof(*f) + len, &new_name, name_len);
+	if (!f)
+		return NULL;
+
 	memcpy(f->data, data, len);
 	if (name)
 		f->avl.key = strcpy(new_name, name);
@@ -345,6 +349,30 @@ static int handle_expr_not(struct json_call *call, struct blob_attr *expr)
 	return !ret;
 }
 
+static int handle_expr_isdir(struct json_call *call, struct blob_attr *expr)
+{
+	static struct blob_buf b;
+	struct blob_attr *tb[3];
+	const char *pattern, *path;
+	struct stat s;
+	int ret;
+
+	json_get_tuple(expr, tb, BLOBMSG_TYPE_STRING, 0);
+	if (!tb[1] || blobmsg_type(tb[1]) != BLOBMSG_TYPE_STRING)
+		return -1;
+	pattern = blobmsg_data(tb[1]);
+
+	blob_buf_init(&b, 0);
+	ret = eval_string(call, &b, NULL, pattern);
+	if (ret < 0)
+		return ret;
+	path = blobmsg_data(blob_data(b.head));
+	ret = stat(path, &s);
+	if (ret < 0)
+		return 0;
+	return S_ISDIR(s.st_mode);
+}
+
 static const struct json_handler expr[] = {
 	{ "eq", handle_expr_eq },
 	{ "regex", handle_expr_regex },
@@ -352,6 +380,7 @@ static const struct json_handler expr[] = {
 	{ "and", handle_expr_and },
 	{ "or", handle_expr_or },
 	{ "not", handle_expr_not },
+	{ "isdir", handle_expr_isdir },
 };
 
 static int
@@ -386,8 +415,10 @@ static int json_process_expr(struct json_call *call, struct blob_attr *cur)
 	}
 
 	ret = __json_process_type(call, cur, expr, ARRAY_SIZE(expr), &found);
-	if (!found)
-		ctx->handle_error(ctx, "Unknown expression type", cur);
+	if (!found) {
+		const char *name = blobmsg_data(blobmsg_data(cur));
+		ctx->handle_expr(ctx, name, cur, call->vars);
+	}
 
 	return ret;
 }
@@ -400,12 +431,15 @@ static int eval_string(struct json_call *call, struct blob_buf *buf, const char
 	char c = '%';
 
 	dest = blobmsg_alloc_string_buffer(buf, name, 1);
+	if (!dest)
+		return -1;
+
 	next = alloca(strlen(pattern) + 1);
 	strcpy(next, pattern);
 
 	for (str = next; str; str = next) {
 		const char *cur;
-		char *end;
+		char *end, *new_buf;
 		int cur_len = 0;
 		bool cur_var = var;
 
@@ -438,7 +472,14 @@ static int eval_string(struct json_call *call, struct blob_buf *buf, const char
 			cur_len = end - str;
 		}
 
-		dest = blobmsg_realloc_string_buffer(buf, len + cur_len + 1);
+		new_buf = blobmsg_realloc_string_buffer(buf, len + cur_len + 1);
+		if (!new_buf) {
+			/* Make eval_string return -1 */
+			var = true;
+			break;
+		}
+
+		dest = new_buf;
 		memcpy(dest + len, cur, cur_len);
 		len += cur_len;
 	}
@@ -632,6 +673,7 @@ static int
 __default_handle_expr(struct json_script_ctx *ctx, const char *name,
 		      struct blob_attr *expr, struct blob_attr *vars)
 {
+	ctx->handle_error(ctx, "Unknown expression type", expr);
 	return -1;
 }