1 files changed, 38 insertions, 0 deletions
diff --git a/vendor/github.com/ncruces/go-sqlite3/vfs/os_unix.go b/vendor/github.com/ncruces/go-sqlite3/vfs/os_unix.go
index bf4b44efd..111af799a 100644
--- a/vendor/github.com/ncruces/go-sqlite3/vfs/os_unix.go
+++ b/vendor/github.com/ncruces/go-sqlite3/vfs/os_unix.go
@@ -31,3 +31,41 @@ func osSetMode(file *os.File, modeof string) error {
 	}
 	return nil
 }
+
+func osTestLock(file *os.File, start, len int64) (int16, _ErrorCode) {
+	lock := unix.Flock_t{
+		Type:  unix.F_WRLCK,
+		Start: start,
+		Len:   len,
+	}
+	if unix.FcntlFlock(file.Fd(), unix.F_GETLK, &lock) != nil {
+		return 0, _IOERR_CHECKRESERVEDLOCK
+	}
+	return lock.Type, _OK
+}
+
+func osLockErrorCode(err error, def _ErrorCode) _ErrorCode {
+	if err == nil {
+		return _OK
+	}
+	if errno, ok := err.(unix.Errno); ok {
+		switch errno {
+		case
+			unix.EACCES,
+			unix.EAGAIN,
+			unix.EBUSY,
+			unix.EINTR,
+			unix.ENOLCK,
+			unix.EDEADLK,
+			unix.ETIMEDOUT:
+			return _BUSY
+		case unix.EPERM:
+			return _PERM
+		}
+		// notest // usually EWOULDBLOCK == EAGAIN
+		if errno == unix.EWOULDBLOCK && unix.EWOULDBLOCK != unix.EAGAIN {
+			return _BUSY
+		}
+	}
+	return def
+}