Fix OpenIndiana.

Author: serhiy-storchaka

Lib/test/test_posix.py

@@ -1531,8 +1531,9 @@ def test_link_follow_symlinks(self):
         link = orig + 'link'
         posix.link(symlink, link)
         self.addCleanup(os_helper.unlink, link)
-        default_follow = sys.platform.startswith(('darwin', 'freebsd', 'netbsd', 'openbsd', 'dragonfly'))
-        default_no_follow = sys.platform.startswith(('win32', 'linux', 'sunos5'))
+        default_follow = sys.platform.startswith(
+            ('darwin', 'freebsd', 'netbsd', 'openbsd', 'dragonfly', 'sunos5'))
+        default_no_follow = sys.platform.startswith(('win32', 'linux'))
         if os.link in os.supports_follow_symlinks or default_follow:
             self.assertEqual(posix.lstat(link), posix.lstat(orig))
         elif default_no_follow:

Misc/NEWS.d/next/Library/2025-04-14-17-24-50.gh-issue-81793.OhRTTT.rst

@@ -1,6 +1,6 @@
-Fix :func:`os.link` on platforms (like Linux and OpenIndiana) where the
-system :c:func:`!link` function does not follow symlinks. On Linux and
-OpenIndiana, it now follows symlinks by default and if
+Fix :func:`os.link` on platforms (like Linux) where the
+system :c:func:`!link` function does not follow symlinks. On Linux,
+it now follows symlinks by default and if
 ``follow_symlinks=True`` is specified. On Windows, it now raises error if
 ``follow_symlinks=True`` is passed. On macOS, it now raises error if
 ``follow_symlinks=False`` is passed and the system :c:func:`!linkat`

Modules/posixmodule.c

@@ -4364,12 +4364,12 @@ os_link_impl(PyObject *module, path_t *src, path_t *dst, int src_dir_fd,
         }
 /* See issue 41355: link() on Linux works like linkat without AT_SYMLINK_FOLLOW,
    but on Mac it works like linkat *with* AT_SYMLINK_FOLLOW. */
-#if defined(MS_WINDOWS) || defined(__linux__) || (defined(__sun) && defined(__SVR4))
+#if defined(MS_WINDOWS) || defined(__linux__)
         if (follow_symlinks == 1) {
             argument_unavailable_error("link", "follow_symlinks=True");
             return NULL;
         }
-#elif defined(__APPLE__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)
+#elif defined(__APPLE__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) || (defined(__sun) && defined(__SVR4))
         if (follow_symlinks == 0) {
             argument_unavailable_error("link", "follow_symlinks=False");
             return NULL;