utils: Move 'fcntl-flock' to (guix build syscalls).

* guix/utils.scm (%struct-flock, F_SETLKW, F_SETLK, F_xxLCK)
(fcntl-flock): Move to...
* guix/build/syscalls.scm: ... here.  New variables.
* guix/nar.scm: Adjust imports accordingly.
* tests/utils.scm ("fcntl-flock wait", "fcntl-flock non-blocking"): Move
to...
* tests/syscalls.scm: ... here.  New tests.
(temp-file): New variable.

1 files changed, 0 insertions, 82 deletions

diff --git a/tests/utils.scm b/tests/utils.scm
index a54482e94ce..6590ed91cf8 100644
--- a/tests/utils.scm
+++ b/tests/utils.scm
@@ -168,88 +168,6 @@
                   (call-with-decompressed-port 'xz (open-file temp-file "r0b")
                     get-bytevector-all))))
 
-(false-if-exception (delete-file temp-file))
-(test-equal "fcntl-flock wait"
-  42                                              ; the child's exit status
-  (let ((file (open-file temp-file "w0b")))
-    ;; Acquire an exclusive lock.
-    (fcntl-flock file 'write-lock)
-    (match (primitive-fork)
-      (0
-       (dynamic-wind
-         (const #t)
-         (lambda ()
-           ;; Reopen FILE read-only so we can have a read lock.
-           (let ((file (open-file temp-file "r0b")))
-             ;; Wait until we can acquire the lock.
-             (fcntl-flock file 'read-lock)
-             (primitive-exit (read file)))
-           (primitive-exit 1))
-         (lambda ()
-           (primitive-exit 2))))
-      (pid
-       ;; Write garbage and wait.
-       (display "hello, world!"  file)
-       (force-output file)
-       (sleep 1)
-
-       ;; Write the real answer.
-       (seek file 0 SEEK_SET)
-       (truncate-file file 0)
-       (write 42 file)
-       (force-output file)
-
-       ;; Unlock, which should let the child continue.
-       (fcntl-flock file 'unlock)
-
-       (match (waitpid pid)
-         ((_  . status)
-          (let ((result (status:exit-val status)))
-            (close-port file)
-            result)))))))
-
-(test-equal "fcntl-flock non-blocking"
-  EAGAIN                                          ; the child's exit status
-  (match (pipe)
-    ((input . output)
-     (match (primitive-fork)
-       (0
-        (dynamic-wind
-          (const #t)
-          (lambda ()
-            (close-port output)
-
-            ;; Wait for the green light.
-            (read-char input)
-
-            ;; Open FILE read-only so we can have a read lock.
-            (let ((file (open-file temp-file "w0")))
-              (catch 'flock-error
-                (lambda ()
-                  ;; This attempt should throw EAGAIN.
-                  (fcntl-flock file 'write-lock #:wait? #f))
-                (lambda (key errno)
-                  (primitive-exit (pk 'errno errno)))))
-            (primitive-exit -1))
-          (lambda ()
-            (primitive-exit -2))))
-       (pid
-        (close-port input)
-        (let ((file (open-file temp-file "w0")))
-          ;; Acquire an exclusive lock.
-          (fcntl-flock file 'write-lock)
-
-          ;; Tell the child to continue.
-          (write 'green-light output)
-          (force-output output)
-
-          (match (waitpid pid)
-            ((_  . status)
-             (let ((result (status:exit-val status)))
-               (fcntl-flock file 'unlock)
-               (close-port file)
-               result)))))))))
-
 ;; This is actually in (guix store).
 (test-equal "store-path-package-name"
   "bash-4.2-p24"