#t)
(define (call-with-file-lock file thunk)
- (let ((port (lock-file file)))
+ (let ((port (catch 'system-error
+ (lambda ()
+ (lock-file file))
+ (lambda args
+ ;; When using the statically-linked Guile in the initrd,
+ ;; 'fcntl-flock' returns ENOSYS unconditionally. Ignore
+ ;; that error since we're typically the only process running
+ ;; at this point.
+ (if (= ENOSYS (system-error-errno args))
+ #f
+ (apply throw args))))))
(dynamic-wind
(lambda ()
#t)
thunk
(lambda ()
- (unlock-file port)))))
+ (when port
+ (unlock-file port))))))
(define-syntax-rule (with-file-lock file exp ...)
"Wait to acquire a lock on FILE and evaluate EXP in that context."