json: use strtok_r() instead of strtok()

commit 4646d656466b1f05bd765bbfb4d6d7bf1529bdbd upstream.

strtok_r() is probably(?) everywhere available where we care.
Use it. It is thread-safe, and libnftables shouldn't make
assumptions about what other threads of the process are doing.

Signed-off-by: Thomas Haller <thaller@redhat.com>
Signed-off-by: Florian Westphal <fw@strlen.de>

1 files changed, 3 insertions, 2 deletions

diff --git a/src/json.c b/src/json.c
index dc6c03b5..dbcbd5b0 100644
--- a/src/json.c
+++ b/src/json.c
@@ -87,8 +87,9 @@ static json_t *set_dtype_json(const struct expr *key)
 {
 	char *namedup = xstrdup(key->dtype->name), *tok;
 	json_t *root = NULL;
+	char *tok_safe;
 
-	tok = strtok(namedup, " .");
+	tok = strtok_r(namedup, " .", &tok_safe);
 	while (tok) {
 		json_t *jtok = json_string(tok);
 		if (!root)
@@ -97,7 +98,7 @@ static json_t *set_dtype_json(const struct expr *key)
 			root = nft_json_pack("[o, o]", root, jtok);
 		else
 			json_array_append_new(root, jtok);
-		tok = strtok(NULL, " .");
+		tok = strtok_r(NULL, " .", &tok_safe);
 	}
 	xfree(namedup);
 	return root;