Removed dlsym dependency

src/unix/fs.c

@@ -286,31 +286,8 @@ static ssize_t uv__fs_mkdtemp(uv_fs_t* req) {
 }
 
 
-static int (*uv__mkostemp)(char*, int);
-
-
-static void uv__mkostemp_initonce(void) {
-  /* z/os doesn't have RTLD_DEFAULT but that's okay
-   * because it doesn't have mkostemp(O_CLOEXEC) either.
-   */
-#ifdef RTLD_DEFAULT
-  uv__mkostemp = (int (*)(char*, int)) dlsym(RTLD_DEFAULT, "mkostemp");
-
-  /* We don't care about errors, but we do want to clean them up.
-   * If there has been no error, then dlerror() will just return
-   * NULL.
-   */
-  dlerror();
-#endif  /* RTLD_DEFAULT */
-}
-
-
 static int uv__fs_mkstemp(uv_fs_t* req) {
-  static uv_once_t once = UV_ONCE_INIT;
   int r;
-#ifdef O_CLOEXEC
-  static _Atomic int no_cloexec_support;
-#endif
   static const char pattern[] = "XXXXXX";
   static const size_t pattern_size = sizeof(pattern) - 1;
   char* path;
@@ -331,27 +308,6 @@ static int uv__fs_mkstemp(uv_fs_t* req) {
     goto clobber;
   }
 
-  uv_once(&once, uv__mkostemp_initonce);
-
-#ifdef O_CLOEXEC
-  if (atomic_load_explicit(&no_cloexec_support, memory_order_relaxed) == 0 &&
-      uv__mkostemp != NULL) {
-    r = uv__mkostemp(path, O_CLOEXEC);
-
-    if (r >= 0)
-      return r;
-
-    /* If mkostemp() returns EINVAL, it means the kernel doesn't
-       support O_CLOEXEC, so we just fallback to mkstemp() below. */
-    if (errno != EINVAL)
-      goto clobber;
-
-    /* We set the static variable so that next calls don't even
-       try to use mkostemp. */
-    atomic_store_explicit(&no_cloexec_support, 1, memory_order_relaxed);
-  }
-#endif  /* O_CLOEXEC */
-
   if (req->cb != NULL)
     uv_rwlock_rdlock(&req->loop->cloexec_lock);