app/graph: replace strtok with reentrant version

The function strtok is not thread safe, better to use strtok_r.
This patch was found by running semgrep on the DPDK repository.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Acked-by: Chengwen Feng <fengchengwen@huawei.com>

app/graph/graph.c

@@ -103,9 +103,9 @@ parser_usecases_read(char *usecases)
 {
 	bool valid = false;
 	uint32_t i, j = 0;
-	char *token;
+	char *token, *saveptr = NULL;
 
-	token = strtok(usecases, ",");
+	token = strtok_r(usecases, ",", &saveptr);
 	while (token != NULL) {
 		for (i = 0; i < RTE_DIM(supported_usecases); i++) {
 			if (strcmp(supported_usecases[i], token) == 0) {
@@ -116,7 +116,7 @@ parser_usecases_read(char *usecases)
 				break;
 			}
 		}
-		token = strtok(NULL, ",");
+		token = strtok_r(NULL, ",", &saveptr);
 	}
 
 	return valid;

app/graph/utils.c

@@ -95,12 +95,12 @@ parser_ip4_read(uint32_t *value, char *p)
 {
 	uint8_t shift = 24;
 	uint32_t ip = 0;
-	char *token;
+	char *token, *saveptr = NULL;
 
-	token = strtok(p, ".");
+	token = strtok_r(p, ".", &saveptr);
 	while (token != NULL) {
 		ip |= (((uint32_t)strtoul(token, NULL, 10)) << shift);
-		token = strtok(NULL, ".");
+		token = strtok_r(NULL, ".", &saveptr);
 		shift -= 8;
 	}
 
@@ -113,13 +113,13 @@ int
 parser_ip6_read(uint8_t *value, char *p)
 {
 	uint64_t val = 0;
-	char *token;
+	char *token, *saveptr = NULL;
 
-	token = strtok(p, ":");
+	token = strtok_r(p, ":", &saveptr);
 	while (token != NULL) {
 		hex_string_to_uint64(&val, token);
 		*value = val;
-		token = strtok(NULL, ":");
+		token = strtok_r(NULL, ":", &saveptr);
 		value++;
 		val = 0;
 	}
@@ -132,13 +132,13 @@ parser_mac_read(uint64_t *value, char *p)
 {
 	uint64_t mac = 0, val = 0;
 	uint8_t shift = 40;
-	char *token;
+	char *token, *saveptr = NULL;
 
-	token = strtok(p, ":");
+	token = strtok_r(p, ":", &saveptr);
 	while (token != NULL) {
 		hex_string_to_uint64(&val, token);
 		mac |= val << shift;
-		token = strtok(NULL, ":");
+		token = strtok_r(NULL, ":", &saveptr);
 		shift -= 8;
 		val = 0;
 	}