From: "Ludovic Courtès" <ludo@gnu.org>
To: 54180@debbugs.gnu.org
Cc: "Ludovic Courtès" <ludo@gnu.org>
Subject: [bug#54180] [PATCH 05/12] home: symlink-manager: Remove 'empty-directory?' and avoid TOCTTOU race.
Date: Sun, 27 Feb 2022 14:53:35 +0100 [thread overview]
Message-ID: <20220227135342.10296-5-ludo@gnu.org> (raw)
In-Reply-To: <20220227135342.10296-1-ludo@gnu.org>
This removes three 'stat' syscalls.
* gnu/home/services/symlink-manager.scm (update-symlinks-script)[empty-directory?]:
Remove.
[cleanup-symlinks]: Replace use of 'file-exists?', 'file-is-directory?',
and 'empty-directory?' by a single 'rmdir' call.
---
gnu/home/services/symlink-manager.scm | 35 ++++++++++++++-------------
1 file changed, 18 insertions(+), 17 deletions(-)
diff --git a/gnu/home/services/symlink-manager.scm b/gnu/home/services/symlink-manager.scm
index f133eb17f2..6b3a9de3d1 100644
--- a/gnu/home/services/symlink-manager.scm
+++ b/gnu/home/services/symlink-manager.scm
@@ -1,6 +1,7 @@
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2021 Andrew Tropin <andrew@trop.in>
;;; Copyright © 2021 Xinglu Chen <public@yoctocell.xyz>
+;;; Copyright © 2022 Ludovic Courtès <ludo@gnu.org>
;;;
;;; This file is part of GNU Guix.
;;;
@@ -101,9 +102,6 @@ (define (get-target-path path)
(define (get-backup-path path)
(string-append backup-dir "/." path))
- (define (empty-directory? dir)
- (equal? (scandir dir) '("." "..")))
-
(define (symlink-to-store? path)
(and (equal? (stat:type (lstat path)) 'symlink)
(store-file-name? (readlink path))))
@@ -127,20 +125,23 @@ (define (cleanup-symlinks old-tree)
(('dir . ".")
(display (G_ "Cleanup finished.\n\n")))
- (('dir . path)
- (if (and
- (file-exists? (get-target-path path))
- (file-is-directory? (get-target-path path))
- (empty-directory? (get-target-path path)))
- (begin
- (format #t (G_ "Removing ~a...")
- (get-target-path path))
- (rmdir (get-target-path path))
- (display (G_ " done\n")))
- (format
- #t
- (G_ "Skipping ~a (not an empty directory)... done\n")
- (get-target-path path))))
+ (('dir . directory)
+ (let ((directory (get-target-path directory)))
+ (catch 'system-error
+ (lambda ()
+ (rmdir directory)
+ (format #t (G_ "Removed ~a.\n") directory))
+ (lambda args
+ (let ((errno (system-error-errno args)))
+ (cond ((= ENOTEMPTY errno)
+ (format
+ #t
+ (G_ "Skipping ~a (not an empty directory)...\n")
+ directory))
+ ((= ENOTDIR errno)
+ #t)
+ (else
+ (apply throw args))))))))
(('file . path)
(when (file-exists? (get-target-path path))
--
2.34.0
next prev parent reply other threads:[~2022-02-27 14:02 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-27 13:40 [bug#54180] [PATCH 00/12] Home: Clarify and better test symlink-manager.scm Ludovic Courtès
2022-02-27 13:53 ` [bug#54180] [PATCH 01/12] home: symlink-manager: Clarify module imports Ludovic Courtès
2022-02-27 13:53 ` [bug#54180] [PATCH 02/12] home: symlink-manager: Move helper procedures as top-level defines Ludovic Courtès
2022-02-27 15:58 ` Maxime Devos
2022-03-10 10:28 ` [bug#54180] [PATCH 00/12] Home: Clarify and better test symlink-manager.scm Ludovic Courtès
2022-02-27 13:53 ` [bug#54180] [PATCH 03/12] home: symlink-manager: Use 'for-each' when used for effects Ludovic Courtès
2022-02-27 13:53 ` [bug#54180] [PATCH 04/12] home: symlink-manager: Use 'file-is-directory?' Ludovic Courtès
2022-02-27 13:53 ` Ludovic Courtès [this message]
2022-02-27 15:54 ` [bug#54180] [PATCH 05/12] home: symlink-manager: Remove 'empty-directory?' and avoid TOCTTOU race Maxime Devos
2022-03-05 22:19 ` [bug#54180] [PATCH 00/12] Home: Clarify and better test symlink-manager.scm Ludovic Courtès
2022-03-05 22:37 ` Maxime Devos
2022-02-27 13:53 ` [bug#54180] [PATCH 06/12] home: symlink-manager: Avoid extra 'lstat' call Ludovic Courtès
2022-02-27 15:52 ` Maxime Devos
2022-02-27 13:53 ` [bug#54180] [PATCH 07/12] tests: Make sure 'guix home reconfigure' backs up files Ludovic Courtès
2022-02-27 13:53 ` [bug#54180] [PATCH 08/12] tests: Simplify use of 'local-file' in 'tests/guix-home.sh' Ludovic Courtès
2022-02-27 13:53 ` [bug#54180] [PATCH 09/12] tests: Check 'guix home reconfigure' for a second generation Ludovic Courtès
2022-02-27 15:49 ` Maxime Devos
2022-03-05 22:20 ` [bug#54180] [PATCH 00/12] Home: Clarify and better test symlink-manager.scm Ludovic Courtès
2022-03-05 22:27 ` Maxime Devos
2022-03-05 22:38 ` Maxime Devos
2022-03-10 10:24 ` Ludovic Courtès
2022-03-10 10:23 ` Ludovic Courtès
2022-02-27 13:53 ` [bug#54180] [PATCH 10/12] home: symlink-manager: 'cleanup-symlinks' uses 'file-system-fold' Ludovic Courtès
2022-02-27 13:53 ` [bug#54180] [PATCH 11/12] home: symlink-manager: 'create-symlinks' " Ludovic Courtès
2022-02-27 16:00 ` Maxime Devos
2022-02-27 13:53 ` [bug#54180] [PATCH 12/12] home: symlink-manager: Rename "path" to "file" where appropriate Ludovic Courtès
2022-02-28 7:53 ` [bug#54180] [PATCH 00/12] Home: Clarify and better test symlink-manager.scm Andrew Tropin
2022-03-10 10:45 ` bug#54180: " Ludovic Courtès
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20220227135342.10296-5-ludo@gnu.org \
--to=ludo@gnu.org \
--cc=54180@debbugs.gnu.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this external index
https://git.savannah.gnu.org/cgit/guix.git
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.