X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ian/git?p=chiark-utils.git;a=blobdiff_plain;f=backup%2Ftakedown;h=8372ffab0f20845da086714d04ffc1bcabe87656;hp=158347bde6a17e28ad64a4b317551b7f6581c1c0;hb=a03c623bb1574922308347df36cd57c85e72981a;hpb=3f7f507605d77ece782e847a5a1606197268f220;ds=sidebyside

diff --git a/backup/takedown b/backup/takedown
index 158347b..8372ffa 100755
--- a/backup/takedown
+++ b/backup/takedown
@@ -1,9 +1,42 @@
 #!/bin/sh
+# takedown
+# Entry point for cron to take the system down for backups
 #
-# Take the system down for backups and then bring it back up.
+# This file is part of chiark backup, a system for backing up GNU/Linux and
+# other UN*X-compatible machines, as used on chiark.greenend.org.uk.
+#
+# chiark backup is:
+#  Copyright (C) 1997-1998,2000-2001 Ian Jackson <ian@chiark.greenend.org.uk>
+#  Copyright (C) 1999 Peter Maydell <pmaydell@chiark.greenend.org.uk>
+#
+# This is free software; you can redistribute it and/or modify it under the
+# terms of the GNU General Public License as published by the Free Software
+# Foundation; either version 2, or (at your option) any later version.
+#
+# This is distributed in the hope that it will be useful, but WITHOUT ANY
+# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+# details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+# Expects a single (possibly empty) argument X which is used to select
+# a file /etc/chiark-backup/warnings.X. This file will contain lines like:
+# T 300 "in 10 minutes"
+# T 240 "in 5 minutes"
+# T 45 "in 1 minute"
+# T 15 "in 15 seconds"
+# configuring the frequency of warning messages. If you call the 
+# files 'warnings.soon', 'warnings.now' and 'warnings.' then
+# you can invoke this as:
+#   takedown                     lots of warnings
+#   takedown soon                not so many warnings
+#   takedown now                 no warning at all
 
 set -e
-cd /etc/backup
+cd /etc/chiark-backup
 
 host="`hostname`" || true
 
@@ -30,4 +63,7 @@ END
 ) &
 sleep 1
 
+# We assume that runlevel 5 is set up suitably for doing backups
+# (ie non-essential services turned off in an effort to get the
+# tape to stream.)
 telinit 5