>From 7207e4a3d533d959eebbb947235f741b1586722b Mon Sep 17 00:00:00 2001 From: Paul Eggert Date: Sat, 26 Aug 2017 23:07:01 -0700 Subject: [PATCH] Fix over-protection of byte-compiled files Problem reported by Sven Joachim (Bug#28244). Also, fix similar problem for autoload files. * lisp/emacs-lisp/autoload.el (autoload--save-buffer): Set temp file modes to the buffer-file-name file modes (or 666 if not available) as adjusted by umask. * lisp/emacs-lisp/bytecomp.el (byte-compile-file): Set temp file modes to 666 as adjusted by umask. --- lisp/emacs-lisp/autoload.el | 8 +++++++- lisp/emacs-lisp/bytecomp.el | 5 +++++ 2 files changed, 12 insertions(+), 1 deletion(-) diff --git a/lisp/emacs-lisp/autoload.el b/lisp/emacs-lisp/autoload.el index 4a9bd6d..e811ee2 100644 --- a/lisp/emacs-lisp/autoload.el +++ b/lisp/emacs-lisp/autoload.el @@ -873,12 +873,18 @@ autoload-generate-file-autoloads ;; For parallel builds, to stop another process reading a half-written file. (defun autoload--save-buffer () "Save current buffer to its file, atomically." - ;; Copied from byte-compile-file. + ;; Similar to byte-compile-file. (let* ((version-control 'never) (tempfile (make-temp-file buffer-file-name)) + (default-modes (default-file-modes)) + (temp-modes (logand default-modes #o600)) + (desired-modes (logand default-modes + (or (file-modes buffer-file-name) #o666))) (kill-emacs-hook (cons (lambda () (ignore-errors (delete-file tempfile))) kill-emacs-hook))) + (unless (= temp-modes desired-modes) + (set-file-modes tempfile desired-modes)) (write-region (point-min) (point-max) tempfile nil 1) (backup-buffer) (rename-file tempfile buffer-file-name t)) diff --git a/lisp/emacs-lisp/bytecomp.el b/lisp/emacs-lisp/bytecomp.el index d769a15..48bbd61 100644 --- a/lisp/emacs-lisp/bytecomp.el +++ b/lisp/emacs-lisp/bytecomp.el @@ -1896,10 +1896,15 @@ byte-compile-file ;; parallel bootstrap), it does not risk getting a ;; half-finished file. (Bug#4196) (tempfile (make-temp-file target-file)) + (default-modes (default-file-modes)) + (temp-modes (logand default-modes #o600)) + (desired-modes (logand default-modes #o666)) (kill-emacs-hook (cons (lambda () (ignore-errors (delete-file tempfile))) kill-emacs-hook))) + (unless (= temp-modes desired-modes) + (set-file-modes tempfile desired-modes)) (write-region (point-min) (point-max) tempfile nil 1) ;; This has the intentional side effect that any ;; hard-links to target-file continue to -- 2.7.4