Call fdatasync/fsync after writing out non-meta pages

This avoids a case where writes can be reordered so meta page is
written before a page it refers to, potentially causing a corrupt
database after a power loss or kernel crash.

1 files changed, 10 insertions, 0 deletions

diff --git a/sync_linux.go b/sync_linux.go
new file mode 100644
index 0000000..351b65a
--- /dev/null
+++ b/sync_linux.go
@@ -0,0 +1,10 @@
+package bolt
+
+import (
+	"os"
+	"syscall"
+)
+
+func fdatasync(f *os.File) error {
+	return syscall.Fdatasync(int(f.Fd()))
+}