src: do not modify original argv array on AIX

AIX passes the same argv array that ps and other utilities see to
main(). Node removes elements from argv but as it can't pass back
updates to argc which is passed by value to main() it effectively
corrupts that array for other users.

Fixes: nodejs#10607

src/node_main.cc

@@ -55,6 +55,18 @@ int main(int argc, char *argv[]) {
   // calls elsewhere in the program (e.g., any logging from V8.)
   setvbuf(stdout, nullptr, _IONBF, 0);
   setvbuf(stderr, nullptr, _IONBF, 0);
+#ifdef _AIX
+  // AIX passes the same argv array that ps and other utilities see.
+  // Node removes elements from argv but can't pass back updates to
+  // argc effectively corrupting it for other users.
+  char *local_argv[argc+1];
+  for (int i = 0; i < argc; i++) {
+    local_argv[i] = argv[i];
+  }
+  local_argv[argc] = nullptr;
+  return node::Start(argc, local_argv);
+#else
   return node::Start(argc, argv);
+#endif  // _AIX
 }
 #endif