[PATCH btrace] Add in -r support for btrace

[Alan D. Brunelle]

Using Ubuntu, debugfs is mounted on /debug instead of /sys/kernel/debug. 
[Perhaps, we should put in blktrace a search through "common" areas 
where debug could be mounted, and or do a simple parsing of the output 
from a 'mount' command to /find/ the directory.]

#!/bin/sh
# Copyright (c) 2005 Silicon Graphics, Inc.
# All rights reserved.
# 
#       Nathan Scott <[EMAIL PROTECTED]>
#       14 Sep 2005     Initial version
# 
TRACEOPTS=""
PARSEOPTS="-b100000"
SUMMARIZE=""
USAGE="Usage: btrace [-s] [-t] [-S] [-w N] [-a <trace>...] [-r <dbg 
mnt]<dev>..."
DIRNAME=`dirname $0`

while getopts "a:r:stSw:hv" c
do
        case $c in
        a)      TRACEOPTS=$TRACEOPTS" -a "$OPTARG" ";;
        w)      TRACEOPTS=$TRACEOPTS" -w "$OPTARG" ";;
        n)      TRACEOPTS=$TRACEOPTS" -n "$OPTARG" ";;
        b)      TRACEOPTS=$TRACEOPTS" -b "$OPTARG" ";;
        r)      TRACEOPTS=$TRACEOPTS" -r "$OPTARG" ";;
        s)      PARSEOPTS=$PARSEOPTS" -s";;
        t)      PARSEOPTS=$PARSEOPTS" -t";;
        h)      PARSEOPTS=$PARSEOPTS" -h";;
        v)      PARSEOPTS=$PARSEOPTS" -v";;
        S)      SUMMARIZE="";;
        \?)     echo $USAGE 1>&2
                exit 2
                ;;
        esac
done
PARSEOPTS="${PARSEOPTS} ${SUMMARIZE}"

shift `expr $OPTIND - 1`
if [ $# -eq 0 ]; then
        echo $USAGE 1>&2
        exit 2
fi

${DIRNAME}/blktrace ${TRACEOPTS} -o- $@ | ${DIRNAME}/blkparse ${PARSEOPTS} -i-