#!/bin/sh
# Shell script to perform dumps on all important filesystems.
#
# Author: R.F. Smith <rsmith@xs4all.nl>
# Time-stamp: <2012-01-14 14:39:25 rsmith>
#
# To the extent possible under law, Roland Smith has waived all copyright and
# related or neighboring rights to dodumps. This work is published from the
# Netherlands. See http://creativecommons.org/publicdomain/zero/1.0/

# Check for programs that are used in this script.
PROGS="dump"
for P in $PROGS; do
    which $P >/dev/null 2>&1
    if [ $? -ne 0 ]; then
	echo "$(basename $0): The program \"$P\" cannot be found."
	exit 1
    fi
done

export DDATE=$(date "+%Y%m%d")

# Get and check the dump level
if [ $# -lt 2 ]; then
    echo "Usage: $(basename $0) level destdir"
    echo "Where 'level' should be a number in the range 0..9."
    echo "And 'destdir' should be the directory where the dumps will be put."
    echo "The $(basename $0) script must be run as root."
    exit 1
fi
export DLVL=$1
if [ $DLVL -lt 0 -o $DLVL -gt 9 ]; then
    echo "Invalid dump number: ${DLVL}. Must be 0..9. Exiting."
    exit 1
fi

# Check if the target directory exists.
export DDIR=$(echo $2|sed 's/\/$//')
if [ ! -d $DDIR ]; then
    echo "The $DDIR directory doesn't exist. Exiting."
    exit 1
fi

# Only root can perform dumps.
if [ $(id -u) -ne 0 ]; then
    echo "The $(basename $0) script must be run as root."
    exit 1
fi

# Enumerate the mount points to dump.
MNTS="/ /usr /var"

echo "Performing level $L dump for mount points "$MNTS"."
for p in $MNTS; do
    case $p in
	'/') export FSNAME=/root;;
	*) export FSNAME=$p;;
    esac
	OUTF=${DDIR}${FSNAME}-${DLVL}-${DDATE}.dump
	# Set the dump command options.
	DCMD="dump -${DLVL} -a -C 8 -L -u -R -h 0 -f ${OUTF} "
	$DCMD $p 
done