#!/bin/bash

DEV="/dev/sdc1"
DIR="/mnt/test"
CURRENT=$PWD

run()
{
	typeset LINEID="$1"
	typeset LOGFILE="$2"
	typeset CMD="$3"
	echo "$CMD"
	# fields of time output:
	#
	# LINEID: a tag to identify the line (make, rm, ...)
	# %e: Elapsed real time (in seconds)
	# %S: Total number of CPU-seconds that the process spent in kernel mode
	# %U: Total number of CPU-seconds that the process spent in user mode.
	# %F: Number of major page faults
	# %R: Number of minor, or recoverable, page faults
	# %W: Number of times the process was swapped out of main memory
	# %c: Number of times the process was context-switched involuntarily
	# %w: Number  of  waits
	# %I: Number of file system inputs by the process
	# %O: Number of file system outputs by the process
	# %k: Number of signals delivered to the process
	
	/usr/bin/time  -o "$LOGFILE" -a -f "$LINEID %e %S %U %F %R %W %c %w %I %O %k" $CMD
}

# TEST

umount $DEV
if df | grep $DEV
then
	echo "ERROR: $DEV in use" 1>&2
	exit 1
fi

	#"ext2 nobhbar" \

for filesystem in \
	"ext2 defaults" \
	"ext3 data=ordered" \
	"ext3 data=writeback" \
	"ext3 data=ordered,extents" \
	"ext3 data=ordered,mballoc,extents" \
	"ext3 data=ordered,mballoc,delalloc,extents" \
	"ext3 data=writeback,extents" \
	"ext3 data=writeback,mballoc,extents" \
	"ext3 data=writeback,mballoc,delalloc,extents" \
	"xfs defaults" \
	"jfs defaults" \
	"reiserfs defaults"
do
	FS=${filesystem%% *}
	OPT=${filesystem##* }

	LOGFILE="${CURRENT}/${FS}_${OPT}"
	rm -f "$LOGFILE"
	
	if [ "$FS" = "jfs" ]
	then
		CMD="mkfs -t $FS -q -L jfs_volume $DEV"
	elif [ "$FS" = "xfs" ]
	then
		CMD="mkfs -t $FS -f $DEV"
	elif [ "$FS" = "reiserfs" ]
	then
		CMD="mkfs -t $FS -f $DEV"
	else
		CMD="mkfs -t $FS $DEV"
	fi

	echo $CMD
	if ! $CMD > /dev/null
	then
		echo "Failed !"
		exit 1
	fi

        echo mount -t $FS -o $OPT $DEV $DIR
        if ! mount -t $FS -o $OPT $DEV $DIR
	then
		echo "Failed !"
		exit 1
	fi

	echo "Entering $DIR"
	cd $DIR

	# copy tarball

	sync
	run "tar_cp" "$LOGFILE" "cp /root/linux-2.6.10.tar.bz2 ."
	run "tar_cp_sync" "$LOGFILE" sync
	run "tar_x" "$LOGFILE" "tar jxf linux-2.6.10.tar.bz2"
	run "tar_x_sync" "$LOGFILE" sync

	echo "Entering linux-2.6.10"
	cd linux-2.6.10

	run "make_defconfig" "$LOGFILE" "make defconfig"
	run "make" "$LOGFILE" "make"
	run "make_sync" "$LOGFILE" sync

	echo "Exiting $(basename $PWD)"
	cd ..

	run "rm" "$LOGFILE" "rm -fr linux-2.6.10"
	run "rm_sync" "$LOGFILE" sync

	echo "Exiting $PWD"
	cd
	
	echo umount $DEV
	while ! umount $DEV
	do
		echo "Retry..."
		sleep 5
		echo umount $DEV
	done
done