diff options
| author | Ludovic Courtès <ludo@gnu.org> | 2016-06-13 17:52:08 +0200 |
|---|---|---|
| committer | Ludovic Courtès <ludo@gnu.org> | 2016-06-13 18:05:54 +0200 |
| commit | 1752a17a1e6f7138892eeeb4806cd04ccb3ca1b0 (patch) | |
| tree | b214b397e41996725a20c81da83bc4cd4187383e /guix/build/syscalls.scm | |
| parent | 9f8ee3fe0ed615a89520618c4df66647845b15b3 (diff) | |
| download | gnu-guix-1752a17a1e6f7138892eeeb4806cd04ccb3ca1b0.tar gnu-guix-1752a17a1e6f7138892eeeb4806cd04ccb3ca1b0.tar.gz | |
utils: 'with-atomic-file-output' calls 'fdatasync'.
Suggested by Danny Milosavljevic <dannym@scratchpost.org>
at <https://lists.gnu.org/archive/html/guix-devel/2016-06/msg00456.html>.
* guix/build/syscalls.scm (fdatasync): New procedure.
* guix/utils.scm (with-atomic-file-output): Use it. Use 'close-port'
instead of 'close'.
Diffstat (limited to 'guix/build/syscalls.scm')
| -rw-r--r-- | guix/build/syscalls.scm | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/guix/build/syscalls.scm b/guix/build/syscalls.scm index 48ff227e10..ed0eb060d9 100644 --- a/guix/build/syscalls.scm +++ b/guix/build/syscalls.scm @@ -64,6 +64,7 @@ processes mkdtemp! + fdatasync pivot-root fcntl-flock @@ -506,6 +507,20 @@ string TMPL and return its file name. TMPL must end with 'XXXXXX'." (list err))) (pointer->string result))))) +(define fdatasync + (let ((proc (syscall->procedure int "fdatasync" (list int)))) + (lambda (port) + "Flush buffered output of PORT, an output file port, and then call +fdatasync(2) on the underlying file descriptor." + (force-output port) + (let* ((fd (fileno port)) + (ret (proc fd)) + (err (errno))) + (unless (zero? ret) + (throw 'system-error "fdatasync" "~S: ~A" + (list fd (strerror err)) + (list err))))))) + (define-record-type <file-system> (file-system type block-size blocks blocks-free |