From 1877a5d328f918540e75444747a7b3903803c8cc Mon Sep 17 00:00:00 2001
From: Steve Kemp <steve@steve.org.uk>
Date: Wed, 3 Jun 2015 12:50:00 +0100
Subject: Working restorations.

---
 byteback-receive | 26 +++++++++++++++++++-------
 byteback-restore | 15 ++++++++++++++-
 2 files changed, 33 insertions(+), 8 deletions(-)

diff --git a/byteback-receive b/byteback-receive
index 1c8f4ae..9756978 100755
--- a/byteback-receive
+++ b/byteback-receive
@@ -3,13 +3,13 @@
 # Program to receive backups and run rsync in receive mode.  Must check that
 # user as authorised by SSH is allowed to access particular directory.
 
-#STDERR.print ARGV.inspect + "\n"
-
 $LOAD_PATH << '/usr/lib/byteback'
+
 require 'trollop'
 require 'byteback'
 include Byteback::Log
 
+
 if ENV['SSH_ORIGINAL_COMMAND']
 	ARGV.concat(ENV['SSH_ORIGINAL_COMMAND'].split(" "))
 end
@@ -20,11 +20,22 @@ fatal("BYTEBACK_HOST environment not set") unless byteback_host
 byteback_root = ENV['HOME'] + "/" + ENV["BYTEBACK_HOST"]
 fatal("#{byteback_root} does not exist") unless File.directory?(byteback_root)
 
-# force destination to be where we expect
 #
-if ARGV[0] == 'rsync'
-	ARGV[-1] = "#{byteback_root}/current"
-	exec(*ARGV)
+#  Force restores to be limited to the hostname we're connecting form
+#
+if ( ARGV[0] == 'restore' )
+     ARGV[0] = 'rsync'
+     a = []
+     ARGV.each do |tmp|
+        if ( tmp =~ /^\/(.*)/ )
+           tmp = "#{byteback_host}/#{$1.dup}"
+        end
+        a.push(tmp)
+     end
+     exec(*a)
+eslif ARGV[0] == 'rsync'
+        ARGV[-1] = "#{byteback_root}/current"
+  exec(*ARGV)
 elsif ARGV[0] == 'byteback-snapshot'
 	ARGV.concat(["--root", "#{byteback_root}"])
 	exec(*ARGV)
@@ -34,6 +45,7 @@ opts = Trollop::options do
 	opt :verbose, "Print diagnostics"
 	opt :ping, "Check connection parameters and exit"
 	opt :list, "Show backed up files matching the given pattern", :type => :string
+	opt :restore, "Perform a restoration operation", :type => :string
 	opt :complete, "Mark current backup as complete"
 end
 
@@ -41,7 +53,7 @@ error("Please only choose one mode") if opts[:ping] && opts[:complete]
 if opts[:complete]
 	system("byteback-snapshot", "--root", byteback_root)
 elsif opts[:list]
-	system( "find #{byteback_root} -print | grep #{opts[:list]}" )
+	system( "cd #{byteback_root} && find . -print | grep #{opts[:list]}" )
 	exit(0 )
 elsif opts[:ping]
 	exit 0
diff --git a/byteback-restore b/byteback-restore
index 00964f1..4972cf4 100755
--- a/byteback-restore
+++ b/byteback-restore
@@ -47,8 +47,21 @@ def list_files( pattern )
 end
 
 
+#
+#  We cannot use plain 'rsync' here because the receiver command will
+# see that, and rewrite our arguments.
+#
+#  To cater to this we have to wrap the rsync for the restore and we
+# do that by setting "rsync-path" to point to the receiver program.
+#
+#
 def restore_file( path, revision )
-  puts "Restoring revision #{revision} of file #{path}"
+  cmd = %w( rsync )
+  cmd += [ "--rsh", "ssh -o BatchMode=yes -x -a -i /etc/byteback/key -l byteback" ]
+  cmd += [ "--rsync-path", "restore" ]
+  cmd += [ "#{@destination_host}:/#{revision}/#{path}", "." ]
+  system(*cmd)
+
 end
 
 
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