s3 support

internal/app/files/diskspace_unix.go

@@ -0,0 +1,15 @@
+//go:build !windows
+
+package files
+
+import "golang.org/x/sys/unix"
+
+// localDiskFreeBytes returns free (available to an unprivileged writer, not
+// counting reserved blocks) and total bytes for the filesystem containing path.
+func localDiskFreeBytes(path string) (free, total int64, err error) {
+	var st unix.Statfs_t
+	if err := unix.Statfs(path, &st); err != nil {
+		return 0, 0, err
+	}
+	return int64(st.Bavail) * int64(st.Bsize), int64(st.Blocks) * int64(st.Bsize), nil
+}