# HG changeset patch
# User Pascal Bellard <pascal.bellard@slitaz.org>
# Date 1350230617 -7200
# Node ID 09fb684d4984e1a5c058ea17557d3432d0da7635
# Parent  9000cde8e23afc76c9ca59a22172f1cd21e3f52c
btrfs-progs: add btrfs-snapshot

diff -r 9000cde8e23a -r 09fb684d4984 btrfs-progs/receipt
--- a/btrfs-progs/receipt	Sun Oct 14 12:11:18 2012 +0200
+++ b/btrfs-progs/receipt	Sun Oct 14 18:03:37 2012 +0200
@@ -27,6 +27,7 @@
 {
 	mkdir -p $fs/usr
 	cp -a $install/usr/bin $fs/usr
+	cp -a $stuff/btrfs-snapshot $fs/usr/bin
 	# Split mkfs --> btrfs-mkfs
 	rm $fs/usr/bin/mkfs.btrfs
 }
diff -r 9000cde8e23a -r 09fb684d4984 btrfs-progs/stuff/btrfs-snapshot
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/btrfs-progs/stuff/btrfs-snapshot	Sun Oct 14 18:03:37 2012 +0200
@@ -0,0 +1,21 @@
+#!/bin/sh
+
+# Keep last 30 daily snapshot with crontab
+#0 0 * * * /usr/bin/btrfs-snapshot 30
+
+btrfs_list()
+{
+	awk '/ btrfs / { if (fs[$1] == "") { fs[$1] = $2; print $2 }}' \
+		< /proc/mounts
+}
+
+which btrfs > /dev/null && for root in $(btrfs_list) ; do
+	dir=${root%/}/.snapshots
+	[ -d $dir ] || mkdir $dir
+	cd $dir
+	i=0
+	for s in $(ls -r); do
+		[ $((i++)) -ge ${1:-10} ] && btrfs subvolume delete $s
+	done
+	btrfs subvolume snapshot -r / $(date +%Y%m%d%H%M%S)
+done