Fix Bug#2928

* test/lisp/net/tramp-tests.el (tramp-test25-file-selinux):
Enhance test.  (Bug#29287)
(tramp-test44-delay-load): Fix for older Emacsen.

diff --git a/test/lisp/net/tramp-tests.el b/test/lisp/net/tramp-tests.el
index 7a7cf933fa3b844bc035c2e2f095058d1c6fc402..a43ac739496916b5f53d66ee32579dc2c5b6fe42 100644 (file)
--- a/test/lisp/net/tramp-tests.el
+++ b/test/lisp/net/tramp-tests.el
@@ -2921,6 +2921,7 @@ This tests also `make-symbolic-link', `file-truename' and `add-name-to-file'."
        ;; Cleanup.
        (ignore-errors (delete-file tmp-name))))))
 
+;; This test is inspired by Bug#29149.
 (ert-deftest tramp-test24-file-acl ()
   "Check that `file-acl' and `set-file-acl' work proper."
   (skip-unless (tramp--test-enabled))
@@ -2995,8 +2996,6 @@ This tests also `make-symbolic-link', `file-truename' and `add-name-to-file'."
        (ignore-errors (delete-file tmp-name1))
        (ignore-errors (delete-file tmp-name3))))))
 
-;; TODO: This test didn't run in reality yet.  Pls report if it
-;; doesn't work as expected.
 (ert-deftest tramp-test25-file-selinux ()
   "Check `file-selinux-context' and `set-file-selinux-context'."
   (skip-unless (tramp--test-enabled))
@@ -3013,7 +3012,7 @@ This tests also `make-symbolic-link', `file-truename' and `add-name-to-file'."
       ;; Both files are remote.
       (unwind-protect
          (progn
-           ;; Two files with same SELINUX context.
+           ;; Two files with same SELinux context.
            (write-region "foo" nil tmp-name1)
            (should (file-exists-p tmp-name1))
            (should (file-selinux-context tmp-name1))
@@ -3023,14 +3022,18 @@ This tests also `make-symbolic-link', `file-truename' and `add-name-to-file'."
             (equal
              (file-selinux-context tmp-name1)
              (file-selinux-context tmp-name2)))
-           ;; Different permissions mean different SELINUX context.
-           (set-file-modes tmp-name1 #o777)
-           (set-file-modes tmp-name2 #o444)
-           (should-not
-            (equal
-             (file-selinux-context tmp-name1)
-             (file-selinux-context tmp-name2)))
-           ;; Copy SELINUX context.
+           ;; Check different SELinux context.  We cannot support
+           ;; different ranges in this test; let's assume the most
+           ;; likely one.
+           (let ((context (file-selinux-context tmp-name1)))
+             (when (and (string-equal (nth 3 context) "s0")
+                        (setcar (nthcdr 3 context) "s0:c0")
+                        (set-file-selinux-context tmp-name1 context))
+               (should-not
+                (equal
+                 (file-selinux-context tmp-name1)
+                 (file-selinux-context tmp-name2)))))
+           ;; Copy SELinux context.
            (should
             (set-file-selinux-context
              tmp-name2 (file-selinux-context tmp-name1)))
@@ -3038,7 +3041,7 @@ This tests also `make-symbolic-link', `file-truename' and `add-name-to-file'."
             (equal
              (file-selinux-context tmp-name1)
              (file-selinux-context tmp-name2)))
-           ;; An invalid SELINUX context does not harm.
+           ;; An invalid SELinux context does not harm.
            (should-not (set-file-selinux-context tmp-name2 "foo")))
 
        ;; Cleanup.
@@ -3047,52 +3050,83 @@ This tests also `make-symbolic-link', `file-truename' and `add-name-to-file'."
 
       ;; Remote and local file.
       (unwind-protect
-         (when (not (or (equal (file-selinux-context temporary-file-directory)
-                               '(nil nil nil nil))
-                        (tramp--test-windows-nt-or-smb-p)))
-           ;; Two files with same SELINUX context.
+         (when (and (not
+                     (or (equal (file-selinux-context temporary-file-directory)
+                                '(nil nil nil nil))
+                         (tramp--test-windows-nt-or-smb-p)))
+                    ;; Both users shall use the same SELinux context.
+                    (string-equal
+                     (let ((default-directory temporary-file-directory))
+                       (shell-command-to-string "id -Z"))
+                     (let ((default-directory
+                             tramp-test-temporary-file-directory))
+                       (shell-command-to-string "id -Z"))))
+
+           ;; Two files with same SELinux context.
            (write-region "foo" nil tmp-name1)
            (should (file-exists-p tmp-name1))
            (should (file-selinux-context tmp-name1))
            (copy-file tmp-name1 tmp-name3)
            (should (file-selinux-context tmp-name3))
+           ;; We cannot expect that copying over file system
+           ;; boundaries keeps SELinux context.  So we copy it
+           ;; explicitely.
+           (should
+            (set-file-selinux-context
+             tmp-name3 (file-selinux-context tmp-name1)))
            (should
             (equal
              (file-selinux-context tmp-name1)
              (file-selinux-context tmp-name3)))
-           ;; Different permissions mean different SELINUX context.
-           (set-file-modes tmp-name1 #o777)
-           (set-file-modes tmp-name3 #o444)
-           (should-not
-            (equal
-             (file-selinux-context tmp-name1)
-             (file-selinux-context tmp-name3)))
-           ;; Copy SELINUX context.
-           (set-file-selinux-context
-            tmp-name3 (file-selinux-context tmp-name1))
+           ;; Check different SELinux context.  We cannot support
+           ;; different ranges in this test; let's assume the most
+           ;; likely one.
+           (let ((context (file-selinux-context tmp-name1)))
+             (when (and (string-equal (nth 3 context) "s0")
+                        (setcar (nthcdr 3 context) "s0:c0")
+                        (set-file-selinux-context tmp-name1 context))
+               (should-not
+                (equal
+                 (file-selinux-context tmp-name1)
+                 (file-selinux-context tmp-name3)))))
+           ;; Copy SELinux context.
+           (should
+            (set-file-selinux-context
+             tmp-name3 (file-selinux-context tmp-name1)))
            (should
             (equal
              (file-selinux-context tmp-name1)
              (file-selinux-context tmp-name3)))
 
-           ;; Two files with same SELINUX context.
+           ;; Two files with same SELinux context.
            (delete-file tmp-name1)
            (copy-file tmp-name3 tmp-name1)
            (should (file-selinux-context tmp-name1))
+           ;; We cannot expect that copying over file system
+           ;; boundaries keeps SELinux context.  So we copy it
+           ;; explicitely.
+           (should
+            (set-file-selinux-context
+             tmp-name1 (file-selinux-context tmp-name3)))
            (should
             (equal
              (file-selinux-context tmp-name1)
              (file-selinux-context tmp-name3)))
-           ;; Different permissions mean different SELINUX context.
-           (set-file-modes tmp-name1 #o777)
-           (set-file-modes tmp-name3 #o444)
-           (should-not
-            (equal
-             (file-selinux-context tmp-name1)
-             (file-selinux-context tmp-name3)))
-           ;; Copy SELINUX context.
-           (set-file-selinux-context
-            tmp-name1 (file-selinux-context tmp-name2))
+           ;; Check different SELinux context.  We cannot support
+           ;; different ranges in this test; let's assume the most
+           ;; likely one.
+           (let ((context (file-selinux-context tmp-name3)))
+             (when (and (string-equal (nth 3 context) "s0")
+                        (setcar (nthcdr 3 context) "s0:c0")
+                        (set-file-selinux-context tmp-name3 context))
+               (should-not
+                (equal
+                 (file-selinux-context tmp-name1)
+                 (file-selinux-context tmp-name3)))))
+           ;; Copy SELinux context.
+           (should
+            (set-file-selinux-context
+             tmp-name1 (file-selinux-context tmp-name3)))
            (should
             (equal
              (file-selinux-context tmp-name1)
@@ -3619,7 +3653,7 @@ This tests also `make-symbolic-link', `file-truename' and `add-name-to-file'."
                    (fboundp 'connection-local-set-profiles)))
 
   ;; `connection-local-set-profile-variables' and
-  ;; `connection-local-set-profiles' exist since Emacs 26.  We don't
+  ;; `connection-local-set-profiles' exist since Emacs 26.1.  We don't
   ;; want to see compiler warnings for older Emacsen.
   (let ((default-directory tramp-test-temporary-file-directory)
        explicit-shell-file-name kill-buffer-query-functions)
@@ -3923,8 +3957,8 @@ This tests also `make-symbolic-link', `file-truename' and `add-name-to-file'."
    (and (fboundp 'make-nearby-temp-file) (fboundp 'temporary-file-directory)))
 
   ;; `make-nearby-temp-file' and `temporary-file-directory' exists
-  ;; since Emacs 26.  We don't want to see compiler warnings for older
-  ;; Emacsen.
+  ;; since Emacs 26.1.  We don't want to see compiler warnings for
+  ;; older Emacsen.
   (let ((default-directory tramp-test-temporary-file-directory)
        tmp-file)
     ;; The remote host shall know a temporary file directory.
@@ -4622,7 +4656,8 @@ process sentinels.  They shall not disturb each other."
           (message \"Tramp loaded: %%s\" (featurep 'tramp)) \
           (file-name-all-completions \"/foo:\" \"/\") \
           (message \"Tramp loaded: %%s\" (featurep 'tramp)))"))
-    (dolist (tm '(t nil))
+    ;; Tramp doesn't load when `tramp-mode' is nil since Emacs 26.1.
+    (dolist (tm (if (tramp--test-emacs26-p) '(t nil) '(nil)))
       (should
        (string-match
        (format