parse disks: improve error messages

The one with the backup flag was reported in the community forum:
https://forum.proxmox.com/threads/77254/

Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>

diff --git a/pve-zsync b/pve-zsync
index 98190b208bce1fee46d6f940a008df2af08f8025..de5d46f529f6a6f897d56349961fda11d60c74d3 100755 (executable)
--- a/pve-zsync
+++ b/pve-zsync
@@ -949,11 +949,12 @@ sub parse_disks {
            $num++;
 
        } else {
-           die "ERROR: in path\n";
+           die "unexpected path '$path'\n";
        }
     }
 
-    die "Vm include no disk on zfs.\n" if !$disks->{0};
+    die "Guest does not include any ZFS volumes (or all are excluded by the backup flag).\n"
+       if !$disks->{0};
     return $disks;
 }