btrfs-mksnapshot[-rootfs]: Clean up, use findmnt(8)

[ax-linux.git] / btrfs / mksnapshot / btrfs-mksnapshot-rootfs

diff --git a/btrfs/mksnapshot/btrfs-mksnapshot-rootfs b/btrfs/mksnapshot/btrfs-mksnapshot-rootfs
index 2744d03727e2bffe3e757a796f05348dd36d2265..dcb840d11719f41844f9c7f26dce05830f6f33db 100755 (executable)
--- a/btrfs/mksnapshot/btrfs-mksnapshot-rootfs
+++ b/btrfs/mksnapshot/btrfs-mksnapshot-rootfs
@@ -19,7 +19,7 @@ Usage()
 
 [ $# -eq 0 ] || Usage
 
-if grep -Fq ' / btrfs ' /etc/fstab; then
+if [ "$(findmnt -fnr -o fstype /)" = "btrfs" ]; then
        if [ -x /usr/local/sbin/btrfs-mksnapshot ]; then
                /usr/local/sbin/btrfs-mksnapshot -1 / || exit 1
        else