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#! /bin/sh
#
# XFS QA Test No. 001
# $Id: 1.1 $
#
# Random file copier to produce chains of identical files so the head
# and the tail cna be diff'd at then end of each iteration.
#
# Exercises creat, write and unlink for a variety of directory sizes, and
# checks for data corruption.
#
# run [config]
#
# config has one line per file with filename and byte size, else use
# the default one below.
#
#-----------------------------------------------------------------------
# Copyright (c) 2000-2001 Silicon Graphics, Inc.  All Rights Reserved.
# 
# This program is free software; you can redistribute it and/or modify it
# under the terms of version 2 of the GNU General Public License as
# published by the Free Software Foundation.
# 
# This program is distributed in the hope that it would be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
# 
# Further, this software is distributed without any warranty that it is
# free of the rightful claim of any third person regarding infringement
# or the like.  Any license provided herein, whether implied or
# otherwise, applies only to this software file.  Patent licenses, if
# any, provided herein do not apply to combinations of this program with
# other software, or any other product whatsoever.
# 
# You should have received a copy of the GNU General Public License along
# with this program; if not, write the Free Software Foundation, Inc., 59
# Temple Place - Suite 330, Boston MA 02111-1307, USA.
# 
# Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
# Mountain View, CA  94043, or:
# 
# http://www.sgi.com 
# 
# For further information regarding this notice, see: 
# 
# http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
#-----------------------------------------------------------------------
#
# creator
owner=kenmcd@bruce.melbourne.sgi.com

seq=`basename $0`
echo "QA output created by $seq"

# get standard environment, filters and checks
. ./common.rc
. ./common.filter

tmp=/tmp/$$
here=`pwd`
status=1
done_cleanup=false
trap "_cleanup; rm -f $tmp.*; exit \$status" 0 1 2 3 15

# real QA test starts here

verbose=true

if [ $# -eq 0 ]
then
    # use the default config
    #
    cat <<End-of-File >$tmp.config
# pathname	size in bytes
#
small		10
big		102400
sub/small	10
sub/big		102400
#
sub/a		1
sub/b		2
sub/c		4
sub/d		8
sub/e		16
sub/f		32
sub/g		64
sub/h		128
sub/i		256
sub/j		512
sub/k		1024
sub/l		2048
sub/m		4096
sub/n		8192
#
sub/a00		100
sub/b00		200
sub/c00		400
sub/d00		800
sub/e00		1600
sub/f00		3200
sub/g00		6400
sub/h00		12800
sub/i00		25600
sub/j00		51200
sub/k00		102400
sub/l00		204800
sub/m00		409600
sub/n00		819200
#
sub/a000	1000
sub/e000	16000
sub/h000	128000
sub/k000	1024000
End-of-File
elif [ $# -eq 1 ]
then
    if [ -f $1 ]
    then
	cp $1 $tmp.config
    else
	echo "Error: cannot open config \"$1\""
	exit 1
    fi
else
    echo "Usage: run [config]"
    exit 1
fi

ncopy=200		# number of file copies in the chain step

_setup()
{
    if mkdir -p $TEST_DIR/$$
    then
	:
    else
	echo "Error: cannot mkdir \"$TEST_DIR/$$\""
	exit 1
    fi
    cd $TEST_DIR/$$

    $verbose && echo -n "setup "
    sed -e '/^#/d' $tmp.config \
    | while read file nbytes
    do
	dir=`dirname $file`
	if [ "$dir" != "." ]
	then
	    if [ ! -d $dir ]
	    then
		if mkdir $dir
		then
		    :
		else
		    $verbose && echo
		    echo "Error: cannot mkdir \"$dir\""
		    exit 1
		fi
	    fi
	fi
	rm -f $file
	if $here/src/fill $file $file $nbytes
	then
	    :
	else
	    $verbose && echo
	    echo "Error: cannot create \"$file\""
	    exit 1
	fi
	$verbose && echo -n "."
    done
    $verbose && echo
}

_mark_iteration()
{
    $verbose && echo -n "mark_iteration "
    sed -e '/^#/d' $tmp.config \
    | while read file nbytes
    do
	if [ ! -f $file ]
	then
	    $verbose && echo
	    echo "Error: $file vanished!"
	    touch $tmp.bad
	    continue
	fi
	sed -e "s/ [0-9][0-9]* / $1 /" <$file >$file.tmp
	mv $file.tmp $file
	$verbose && echo -n "."
    done
    $verbose && echo
}

# for each file, make a number of copies forming a chain like foo.0,
# foo.1, foo.2, ... foo.N
#
# files are chosen at random, so the lengths of the chains are different
#
# then rename foo.N to foo.last and remove all of the other files in
# the chain
#
_chain()
{
    $AWK_PROG <$tmp.config '
BEGIN	{ nfile = 0 }
/^\#/	{ next }
	{ file[nfile] = $1
	  link[nfile] = 0
	  nfile++
	}
END	{ srand('$iter')
	  for (i=0; i < '$ncopy'; i++) {
	    # choose a file at random, and add one copy to that chain
	    j = -1
	    while (j < 0 || j >= nfile)
		j = int(rand() * nfile)
	    if (link[j] == 0) {
		printf "if [ ! -f %s ]; then echo \"%s missing!\"; exit; fi\n",file[j],file[j]
		printf "if [ -f %s.0 ]; then echo \"%s.0 already present!\"; exit; fi\n",file[j],file[j]
		printf "cp %s %s.0\n",file[j],file[j]
	    }
	    else {
		printf "if [ ! -f %s.%d ]; then echo \"%s.%d missing!\"; exit; fi\n",file[j],link[j]-1,file[j],link[j]-1
		printf "if [ -f %s.%d ]; then echo \"%s.%d already present!\"; exit; fi\n",file[j],link[j],file[j],link[j]
		printf "cp %s.%d %s.%d\n",file[j],link[j]-1,file[j],link[j]
	    }
	    link[j]++
	  }
	  # close all the chains, and remove all of the files except
	  # the head of the chain
	  for (j=0; j<nfile; j++) {
	    if (link[j] > 0)
		printf "mv %s.%d %s.last\n",file[j],link[j]-1,file[j]
	    for (i=0; i<link[j]-1; i++) {
		printf "rm -f %s.%d\n",file[j],i
	    }
	  }
	}' \
	| sh
}

_check()
{
    rm -f $tmp.bad
    $verbose && echo -n "check "
    sed -e '/^#/d' $tmp.config \
    | while read file nbytes
    do
	if [ ! -f $file ]
	then
	    $verbose && echo
	    echo "Error: $file vanished!"
	    touch $tmp.bad
	    continue
	fi
	if [ -f $file.last ]
	then
	    if cmp $file $file.last >/dev/null 2>&1
	    then
		$verbose && echo -n "."
	    else
		$verbose && echo
		echo "Error: corruption for $file ..."
		diff -c $file $file.last
		touch $tmp.bad
	    fi
	else
	    $verbose && echo -n "."
	fi
    done
    $verbose && echo
}

_cleanup()
{
    # cleanup
    #
    if $done_cleanup
    then
	:
    elif [ $status -eq 0 ]
    then
	$verbose && echo "cleanup"
	cd /
	rm -rf $TEST_DIR/$$
	done_cleanup=true
    fi
}

status=0
_cleanup
status=1
done_cleanup=false

_setup

# do the test
#
for iter in 1 2 3 4 5
do
    echo -n "iter $iter chain ... "
    _chain
    _check
    if [ -f $tmp.bad ]
    then
	echo "Fatal error: test abandoned without changes"
	exit 1
    fi
done

status=0
exit