add check whether popen success or not

Signed-off-by: staylightblow8 <[email protected]>
liudf0716 · Jan 3, 2024 · 3631256 · 3631256
1 parent 6265f6e
commit 3631256
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/src/fw4_nft.c b/src/fw4_nft.c
@@ -285,6 +285,10 @@ nft_statistical_outgoing(char *outgoing, uint32_t outgoing_len)
 	char *cmd = "nft -j list chain inet fw4 mangle_prerouting_wifidogx_outgoing";
     debug(LOG_DEBUG, "nft -j list chain inet fw4 mangle_prerouting_wifidogx_outgoing");
 	r_fp = popen(cmd, "r");
+    if (r_fp == NULL) {
+        debug(LOG_ERR, "popen failed");
+        return;
+    }
 	fgets(outgoing, outgoing_len, r_fp);
 	pclose(r_fp);
 }
@@ -296,6 +300,10 @@ nft_statistical_incoming(char *incoming, uint32_t incoming_len)
 	char *cmd = "nft -j list chain inet fw4 mangle_postrouting_wifidogx_incoming";
     debug(LOG_DEBUG, "nft -j list chain inet fw4 mangle_postrouting_wifidogx_incoming");
 	r_fp = popen(cmd, "r");
+    if (r_fp == NULL) {
+        debug(LOG_ERR, "popen failed");
+        return;
+    }
 	fgets(incoming, incoming_len, r_fp);
 	pclose(r_fp);
 }