#! /bin/bash

usage() {
    echo 'Usage: bigfile-check file [block ...]' >&2
    exit;
}

fail () {
    exit;
}


VERBOSE=0
while getopts ":v" opt; do
    case $opt in 
        v )
        VERBOSE="-v"
        ;;
        \? )
        usage
        ;;
    esac
done

shift $(($OPTIND-1))
ROOT=`dirname $0`
FILE=$1
shift

if [ "x$FILE" == "x" ]; then
    usage
fi;

check() {
    local BLOCK
    BLOCK=$1
    

    if [ $VERBOSE ]; then
        echo checking $BLOCK >&2
    fi;
    local sumreal
    local sumheader
    sum=`$ROOT/bigfile-cat -b $FILE $BLOCK | sum -s | awk '{print $1}'`
    if [ $? != 0 ]; then
        echo cat failed
        fail
    fi
    expectedsum=`$ROOT/bigfile-ls -l $FILE $BLOCK | awk '{print $5}'`
    if [ $? != 0 ]; then
        echo ls failed
        fail
    fi
    if [ $sum -ne $expectedsum ]; then
        echo check sum failed $BLOCK $sum  $expectedsum
        fail
    fi
}
if [ -z $1 ]; then
    BLOCKS=`$ROOT/bigfile-ls $FILE`
else
    BLOCKS="$*"
fi
JOBS=
for block in $BLOCKS ; do
    ( check $block ) &
    JOBS="$JOBS $!"
done
for job in $JOBS ; do
    wait $job
    if [ $? != 0 ]; then
       fail
    fi
done