gen2stage4/mkstage4.sh

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#!/bin/bash
# checks if run as root:
if ! [ "`whoami`" == "root" ]
then
echo "`basename $0`: must be root."
exit 1
fi
#set flag variables to null
EXCLUDE_BOOT=0
EXCLUDE_CONNMAN=0
QUIET=0
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USAGE="usage:\n\
`basename $0` [-q -c -b] [-s || -t <target-mountpoint>] <archive-filename> [custom-tar-options]\n\
-q: activates quiet mode (no confirmation).\n\
-c: excludes connman network lists.\n\
-b: excludes boot directory.\n\
-s: makes tarball of current system.\n\
-t: makes tarball of system located at the <target-mountpoint>.\n\
-h: displays help message."
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# reads options:
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while getopts ':t:sqcbh' flag; do
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case "${flag}" in
t)
TARGET="$OPTARG"
;;
s)
TARGET="/"
;;
q)
QUIET=1
;;
c)
EXCLUDE_CONNMAN=1
;;
b)
EXCLUDE_BOOT=1
;;
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h)
echo -e "$USAGE"
exit 0
;;
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\?)
echo "Invalid option: -$OPTARG" >&2
exit 1
;;
:)
echo "Option -$OPTARG requires an argument." >&2
exit 1
;;
esac
done
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if [ "$TARGET" == "" ]
then
echo "`basename $0`: no target specified."
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echo -e "$USAGE"
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exit 1
fi
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# shifts pointer to read mandatory output file specification
shift $(($OPTIND - 1))
ARCHIVE=$1
# checks for correct output file specification
if [ "$ARCHIVE" == "" ]
then
echo "`basename $0`: no archive file name specified."
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echo -e "$USAGE"
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exit 1
fi
# checks for quiet mode (no confirmation)
if [ ${QUIET} -eq 1 ]
then
AGREE="yes"
fi
# determines if filename was given with relative or absolute path
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if [ "`echo $ARCHIVE | grep -c '^\/'`" -gt "0" ]
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then
STAGE4_FILENAME="${ARCHIVE}.tar.bz2"
else
STAGE4_FILENAME="`pwd`/${ARCHIVE}.tar.bz2"
fi
#Shifts pointer to read custom tar options
shift;OPTIONS="$@"
# Excludes:
EXCLUDES="\
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--exclude=.bash_history \
--exclude=dev/* \
--exclude=lost+found \
--exclude=media/* \
--exclude=mnt/*/* \
--exclude=proc/* \
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--exclude=run/* \
--exclude=sys/* \
--exclude=tmp/* \
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--exclude=usr/portage/* \
--exclude=var/lock/* \
--exclude=var/log/* \
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--exclude=var/run/*"
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if [ "$TARGET" == "/" ]
then
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EXCLUDES+=" --exclude=${STAGE4_FILENAME#/}"
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fi
if [ ${EXCLUDE_CONNMAN} -eq 1 ]
then
EXCLUDES+=" --exclude=var/lib/connman/*"
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fi
if [ ${EXCLUDE_BOOT} -eq 1 ]
then
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EXCLUDES+=" --exclude=boot/*"
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fi
# Generic tar options:
TAR_OPTIONS="-cjpP --ignore-failed-read -f"
# if not in quiet mode, this message will be displayed:
if [ "$AGREE" != "yes" ]
then
echo "Are you sure that you want to make a stage 4 tarball of the system"
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echo "located under the following directory?"
echo "$TARGET"
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echo ""
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echo "!!! The option --exclude=/mnt/*/* is not yet tested! It should"
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echo "include all the mount points, but exclude mounted data."
echo ""
echo "WARNING: since all data is saved by default the user should exclude all"
echo "security- or privacy-related files and directories, which are not"
echo "already excluded by mkstage4 options (such as -c), manually per cmdline."
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echo "example: \$ `basename $0` -s /my-backup --exclude=/etc/ssh/ssh_host*"
echo ""
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echo -e "COMMAND LINE PREVIEW:"
echo "cd $TARGET && tar $TAR_OPTIONS $STAGE4_FILENAME * $EXCLUDES $OPTIONS"
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echo ""
echo -n "Type \"yes\" to continue or anything else to quit: "
read AGREE
fi
# start stage4 creation:
if [ "$AGREE" == "yes" ]
then
cd $TARGET && tar $TAR_OPTIONS $STAGE4_FILENAME * $EXCLUDES $OPTIONS
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fi
exit 0