#!/bin/csh
#
# $DragonFly: src/bin/cpdup/scripts/do_remote_host,v 1.2 2006/09/21 00:18:13 dillon Exp $

source params

if ( "$argv" == "" ) then
    echo "Specify host mounted in $backup_nfs (e.g. 'apollo'), and level."
    echo "Level 0 - full backup, do not use hardlink trick"
    echo "Level 1 - full backup, use hardlink trick but verify each file"
    echo "Level 2 - full backup, use hardlink trick and stat shortcut"
    echo "./do_remote_host <host> <level> > $remote_path/mirrors/<host>.log"
    exit 1
endif

set host = "$argv[1]"
set level = "$argv[2]"

if ( ! -d $backup_nfs/$host ) then
    echo "Host not found in $backup_nfs"
    exit 1
endif
if ( ! -d $backup_path/mirrors/$host ) then
    echo "No backup found for $host"
    exit 1
endif

# Figure out the source directory
#
set source = `readlink $backup_path/mirrors/$host`
if ( "$source" == "" ) then
    echo "No backup found for $host at $backup_path/mirrors/$host"
    echo "or it was not a softlink"
    exit 1
endif

# Figure out the hardlink optimized side directory on
# the target.
#

if ( $level != 0 ) then
    set hlbase = `ssh $remote_host -n "readlink ${remote_path}/mirrors/$host"`
    if ( "$hlbase" == "" ) then
	echo "Missing softlink at ${remote_host}:${remote_path}/mirrors/${host}"
	echo "cannot proceed.  Perhaps you did not run a level 0 with"
	echo "the do_remote script to create the hardlink base and softlink?"
	exit 1
    endif

    if ( "$hlbase" == "$source" ) then
	echo "SUCCEEDED - NO NEW BACKUP SINCE LAST TIME"
	exit 0
    endif
endif

# Figure out the target path and add prefixes
#
set basename = $source
set target = ${remote_host}:${remote_path}/mirrors/${source}
set source = $backup_path/mirrors/${source}
set hlbase = ${remote_path}/mirrors/${hlbase}

echo "---------- OFFSITE BACKUP OF $source ---------"
echo "SOURCE $source"
echo "HLBASE $hlbase"
echo "TARGET $target"

# Do the actual backup
#

set failed = 0

switch($level)
case 0:
    echo "cpdup -i0 -s0 -I $source $target"
    cpdup -i0 -s0 -I $source $target
    if ( $status != 0 ) then
	set failed = 1
    endif
    breaksw
case 1:
    echo "cpdup -f -i0 -s0 -I -H $hlbase $source $target"
    cpdup -f -i0 -s0 -I -H $hlbase $source $target
    if ( $status != 0 ) then
	set failed = 1
    endif
    breaksw
case 2:
    echo "cpdup -i0 -s0 -I -H $hlbase $source $target"
    cpdup -i0 -s0 -I -H $hlbase $source $target
    if ( $status != 0 ) then
	set failed = 1
    endif
    breaksw
default:
    echo "UNKNOWN BACKUP LEVEL, USE ONLY 0-2"
    set failed = 1
    breaksw
endsw

if ( $failed == 0 ) then
    ssh $remote_host -n "rm -f ${remote_path}/mirrors/$host; ln -s $basename ${remote_path}/mirrors/$host"
    sync
    echo "SUCCEEDED"
    exit 0
else
    sync
    echo "FAILED"
    exit 1
endif