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authorLudovic Courtès <ludo@gnu.org>2019-06-05 11:14:41 +0200
committerLudovic Courtès <ludo@gnu.org>2019-06-05 23:10:37 +0200
commitd088d5c4848f08bd62e722789132f9345659c52c (patch)
treeaaa39f5005b036826b7437bed0e1af93c1caebcf /gnu/build
parented8570dce3683b73bdf668b3ad0f529a1cea30c5 (diff)
downloadguix-d088d5c4848f08bd62e722789132f9345659c52c.tar
guix-d088d5c4848f08bd62e722789132f9345659c52c.tar.gz
accounts: Call 'fdatasync' when writing databases.
* gnu/build/accounts.scm (catch-ENOSYS): New macro. (database-writer): Call 'fdatasync'.
Diffstat (limited to 'gnu/build')
-rw-r--r--gnu/build/accounts.scm14
1 files changed, 14 insertions, 0 deletions
diff --git a/gnu/build/accounts.scm b/gnu/build/accounts.scm
index 2120c1d11d..b90149565f 100644
--- a/gnu/build/accounts.scm
+++ b/gnu/build/accounts.scm
@@ -19,6 +19,7 @@
(define-module (gnu build accounts)
#:use-module (guix records)
#:use-module (guix combinators)
+ #:use-module ((guix build syscalls) #:select (fdatasync))
#:use-module (gnu system accounts)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-11)
@@ -230,6 +231,14 @@ each field."
;; grab this lock with 'with-file-lock' when they access the databases.
"/etc/.pwd.lock")
+(define-syntax-rule (catch-ENOSYS exp)
+ (catch 'system-error
+ (lambda () exp)
+ (lambda args
+ (if (= ENOSYS (system-error-errno args))
+ #f
+ (apply throw args)))))
+
(define (database-writer file mode entry->string)
(lambda* (entries #:optional (file-or-port file))
"Write ENTRIES to FILE-OR-PORT. When FILE-OR-PORT is a file name, write
@@ -249,6 +258,11 @@ to it atomically and set the appropriate permissions."
(lambda ()
(chmod port mode)
(write-entries port)
+
+ ;; XXX: When booting with the statically-linked Guile,
+ ;; 'fdatasync' is unavailable.
+ (catch-ENOSYS (fdatasync port))
+
(close-port port)
(rename-file template file-or-port))
(lambda ()