#!/bin/sh
#
# Convert MIB text into PySNMP-compilant MIB/managed objects module.
# See http://pysnmp.sf.net for more information.
#

basedir=$(dirname "$0")
libsmi2pysnmp=$basedir/libsmi2pysnmp  # part of pysnmp distro
smidump=smidump  # part of libsmi distro

while getopts o: o
  do case "$o" in
  o) outFile=$OPTARG ;;
  [?]) echo >&2 "\
Convert MIB text file into PySNMP-compliant module, see http://pysnmp.sf.net.
Usage: $0 [-o pysnmp-mib-file ] [ mib-text-file ]\
"
  exit 1;;
  esac
done

[ -n "$outFile" ] && {
  exec 5>"$outFile" 1>&5 || { echo >&2 "Redirection failed"; exit 1; }
}

shift $((OPTIND-1))

[ $# -gt 1 ] && { echo >&2 "Extra arguments given"; exit 1; }

[ -z $1 ] && { mibFile="-"; } || { 
    mibFile=$1;
    export SMIPATH="$SMIPATH:$(echo $mibFile | sed -e 's,[^/]*$,.,')";
}        

egrep -q 'FROM *RFC' $mibFile 2> /dev/null && ! egrep -q 'FROM *SNMPv2-' $mibFile 2> /dev/null && { oldMib='yes'; } || {
    [ $? -eq 1 ] && { oldMib='no'; } || {
        echo >&2 "cant open $mibFile";
        exit 1;
    }
}

[ $oldMib = 'yes' ] && { # pysnmp SMI is SMIv2
    [ -x "$(which mktemp)" ] && tmpFile=$(mktemp -t buildmibs.XXXXXXX) || tmpFile=/tmp/buildmibs.$$
    $smidump -k -f smiv2 $mibFile > $tmpFile 2> /dev/null || {
        [ -f $tmpFile ] && rm -f $tmpFile;
        echo >&2 "$smidump -k -f smiv2 $mibFile fails";
        echo >&2 "make sure you are using libsmi version > 0.4.5 (or svn)";
        exit ;
    }
    $smidump -k -f python $tmpFile 2> /dev/null | $libsmi2pysnmp || {
        [ -f $tmpFile ] && rm -f $tmpFile;
        [ -n "$outFile" ] && rm -f $outFile;
        echo >&2 "$smidump -k -f python $mibFile | $libsmi2pysnmp fails";
        echo >&2 "make sure you are using libsmi version > 0.4.5 (or svn)";
        exit
    }
    rm -f $tmpFile
} || {
    $smidump -k -f python $mibFile 2> /dev/null | $libsmi2pysnmp || {
        [ -n "$outFile" ] && rm -f $outFile;
        echo >&2 "$smidump -k -f python $mibFile | $libsmi2pysnmp fails";
        echo >&2 "make sure you are using libsmi version > 0.4.5 (or svn)";
        exit
    }
}

exit