Check losetup capabilities before specifying to mount as read-only.

[live-boot-grml.git] / bin / live-snapshot

diff --git a/bin/live-snapshot b/bin/live-snapshot
index a4f1925..a6550e5 100755 (executable)
--- a/bin/live-snapshot
+++ b/bin/live-snapshot
@@ -3,8 +3,9 @@
 # live-snapshot - utility to manage Debian Live systems snapshots
 #
 #   This program mounts a device (fallback to /tmpfs under $MOUNTP
-#   and saves the /live/cow (or a different dir) filesystem in it for reuse
-#   in another live-initramfs session. Look at manpage for more info.
+#   and saves the /live/cow (or a different directory) filesystem in it
+#   for reuse in another live-initramfs session.
+#   Look at the manpage for more informations.
 #
 # Copyright (C) 2006-2008 Marco Amadori <marco.amadori@gmail.com>
 # Copyright (C) 2008 Chris Lamb <chris@chris-lamb.co.uk>
@@ -351,6 +352,33 @@ Clean ()
        fi
 }
 
+Warn_user ()
+{
+       if [ -z "${SNAP_RESYNC_STRING}" ]
+       then
+               case ${SNAP_TYPE} in
+                       cpio|ext2|ext3)
+                               echo "Please move ${DEST} (if is not already in it)" > /dev/null 1>&2
+                               echo "in a supported writable partition (e.g ext3, vfat)." > /dev/null 1>&2
+                               ;;
+
+                       squashfs)
+                               echo "To use ${DEST} you need to rebuild your media or add it" > /dev/null 1>&2
+                               echo "to your multisession disc under the \"/live\" directory." > /dev/null 1>&2
+                               ;;
+
+                       jffs2)
+                               echo "Please cat or flashcp ${DEST} to your partition in order to start using it." > /dev/null 1>&2
+                               ;;
+               esac
+
+               if grep -qv persistent /proc/cmdline
+               then
+                       echo "Remember to boot this live system with \"persistent\" specified at boot prompt." > /dev/null 1>&2
+               fi
+       fi
+}
+
 Main ()
 {
        Parse_args "${@}"
@@ -359,6 +387,7 @@ Main ()
        trap 'Clean' EXIT
        Mount_device
        Do_snapshot
+       Warn_user
 }
 
 Main "${@:-}"