From d669127d2efaf9969b081fbaff47ff8938388750 Mon Sep 17 00:00:00 2001
From: Sergey Poznyakoff <gray@gnu.org.ua>
Date: Tue, 29 May 2012 13:02:40 +0300
Subject: Rename project to BEAM (Backup Easy And Manageable).

---
 lib/beam/s3.sh | 85 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100644 lib/beam/s3.sh

(limited to 'lib/beam/s3.sh')

diff --git a/lib/beam/s3.sh b/lib/beam/s3.sh
new file mode 100644
index 0000000..5f7235c
--- /dev/null
+++ b/lib/beam/s3.sh
@@ -0,0 +1,85 @@
+# This file is part of BEAM -*- shell-script -*-
+# Copyright (C) 2012 Sergey Poznyakoff
+#
+# BEAM 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 3, or (at your option)
+# any later version.
+#
+# BEAM 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 BEAM.  If not, see <http://www.gnu.org/licenses/>.
+
+# The configuration variable "backup_bucket_name" must contain the name
+# of the s3 bucket to use.
+
+# Raw bucket is mounted to /mnt/s3backer
+test -z "$backup_mp_s3backer" && backup_mp_s3backer=/mnt/s3backer
+# The actual file system is mounted to /mnt/s3
+test -z "$backup_mp" && backup_mp_s3=/mnt/s3
+
+# This variable is populated by s3_mount and is used by s3_unmount to unmount
+# s3-backed file system.
+umount_list=""
+
+s3_mount() {	
+  # Make sure both mountpoints exist
+  test -d $backup_mp_s3backer || mkdir $backup_mp_s3backer
+  test -d $backup_mp_s3 || mkdir $backup_mp_s3backer
+
+# Sample mount output, split into several lines:
+# http://finox-backup-fs.s3.amazonaws.com/ on /mnt/s3backer type fuse.s3backer
+#  (rw,nosuid,nodev,allow_other,default_permissions)
+  set -- $(mount -tfuse.s3backer | 
+           awk '/https?:\/\/'$backup_bucket_name'/ { print $3 }')
+  if test -z "$1"; then
+    $dry_run s3backer $backup_s3backer_options \
+                      $backup_bucket_name $backup_mp_s3backer ||
+	     abend 1 "unable to mount $backup_bucket_name"
+    umount_list="$backup_mp_s3backer"
+  else
+    backup_mp_s3backer=$1
+  fi
+  set -- $(mount | grep "^${backup_mp_s3backer}/file" | awk '{ print $3 }')
+  if test -z "$1"; then
+    case $(basename $0) in
+    beam-restore|restore) mountopt=",ro";;
+    beam-backup|backup)   mountopt=",rw,data=writeback";;
+    beam-s3)  ;;
+    *)       error "called as $0: assuming default mount options"
+    esac
+    # NOTE: For ext4 add the journal_async_commit option.
+    $dry_run mount -oloop$mountopt $backup_mp_s3backer/file $backup_mp_s3 || 
+             abend 1 "unable to mount $backup_mp_s3backer/file"
+    umount_list="$backup_mp_s3 $umount_list"
+  else
+    backup_mp_s3=$1
+  fi
+  epilogue_hook="s3_unmount $epilogue_hook"
+}
+
+s3_getmpoint()
+{
+  case $1 in
+  backer)
+    mount -tfuse.s3backer | 
+           awk '/https?:\/\/'$backup_bucket_name'/ { print $3 }';;
+  s3)
+    mount | grep "^${backup_mp_s3backer}/file" | awk '{ print $3 }';;
+  *)
+    abent 1 "invalid usage of getmpoint"
+  esac
+}
+
+s3_unmount()
+{
+  for id in s3 backer
+  do
+    mpoint=$(s3_getmpoint $id)
+    test -n "$mpoint" && umount $mpoint
+  done
+}
-- 
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