native: Throw any error from dup/dup2

kohlschutter · Feb 4, 2024 · eba1d2c · eba1d2c
1 parent 41d5d08
commit eba1d2c
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/junixsocket-native/src/main/c/filedescriptors.c b/junixsocket-native/src/main/c/filedescriptors.c
@@ -618,6 +618,10 @@ JNIEXPORT jobject JNICALL Java_org_newsclub_net_unix_NativeUnixSocket_duplicate
     } else {
         targetFD = dup2(sourceFD, targetFD);
     }
+    if(targetFD == -1) {
+        _throwErrnumException(env, errno, NULL);
+        return NULL;
+    }
 
     if (targetFD >= 0) {
 #  if defined(FD_CLOEXEC)