add some commands to the live system

1 files changed, 43 insertions, 0 deletions

diff --git a/src/samizdat-diff-root b/src/samizdat-diff-root
new file mode 100755
index 0000000..ea9bb85
--- /dev/null
+++ b/src/samizdat-diff-root
@@ -0,0 +1,43 @@
+#!/bin/sh
+mp=/mnt/root.tmp
+fs=/
+
+excludes='--exclude /var/log/ --exclude /tmp/'
+
+devs()
+{
+  btrfs fi sh "$fs"  | sed -ne 's?^[ \t]*devid[ \t].*/dev?/dev?p'
+}
+
+[ $(id -u) = 0 ] || exec sudo "$0" "$@" || exit
+
+if ! [ -e "$mp" ] || ! mountpoint -q "$mp"
+then
+  mkdir -p "$mp"
+  dev=$(devs | tail -n1) || exit
+  mount -t btrfs "$dev" -o subvol=/ "$mp" || exit
+fi
+
+case $# in
+  0) run()
+     {
+       rsync -xani $excludes "$mp"/root/ "$mp"/root~orig/
+     }
+     ;;
+  *) run()
+     {
+       for f
+       do
+         diff "$mp"/root/"$f" "$mp"/root~orig/"$f"
+       done
+     }
+     ;;
+esac
+if [ -t 0 ]
+then
+  run "$@" | less
+else
+  run "$@"
+fi
+
+umount "$mp"