Mini Shell

#!/bin/sh -f

PLACE=".1.3.6.1.4.1.8072.2.255"  # NET-SNMP-PASS-MIB::netSnmpPassExamples
REQ="$2"                         # Requested OID

#
#  Process SET requests by simply logging the assigned value
#      Note that such "assignments" are not persistent,
#      nor is the syntax or requested value validated
#  
if [ "$1" = "-s" ]; then
  echo $* >> /tmp/passtest.log
  exit 0
fi

#
#  GETNEXT requests - determine next valid instance
#
if [ "$1" = "-n" ]; then
  case "$REQ" in
    $PLACE|		\
    $PLACE.0|		\
    $PLACE.0.*|		\
    $PLACE.1)       RET=$PLACE.1.0 ;;     # netSnmpPassString.0

    $PLACE.1.*|		\
    $PLACE.2|		\
    $PLACE.2.0|		\
    $PLACE.2.0.*|	\
    $PLACE.2.1|		\
    $PLACE.2.1.0|	\
    $PLACE.2.1.0.*|	\
    $PLACE.2.1.1|	\
    $PLACE.2.1.1.*|	\
    $PLACE.2.1.2|	\
    $PLACE.2.1.2.0) RET=$PLACE.2.1.2.1 ;; # netSnmpPassInteger.1

    $PLACE.2.1.2.*|	\
    $PLACE.2.1.3|	\
    $PLACE.2.1.3.0) RET=$PLACE.2.1.3.1 ;; # netSnmpPassOID.1

    $PLACE.2.*|		\
    $PLACE.3)       RET=$PLACE.3.0 ;;     # netSnmpPassTimeTicks.0
    $PLACE.3.*|		\
    $PLACE.4)       RET=$PLACE.4.0 ;;     # netSnmpPassIpAddress.0
    $PLACE.4.*|		\
    $PLACE.5)       RET=$PLACE.5.0 ;;     # netSnmpPassCounter.0
    $PLACE.5.*|		\
    $PLACE.6)       RET=$PLACE.6.0 ;;     # netSnmpPassGauge.0

    *)         	    exit 0 ;;
  esac
else
#
#  GET requests - check for valid instance
#
  case "$REQ" in
    $PLACE.1.0|		\
    $PLACE.2.1.2.1|	\
    $PLACE.2.1.3.1|	\
    $PLACE.3.0|		\
    $PLACE.4.0|		\
    $PLACE.5.0|		\
    $PLACE.6.0)     RET=$REQ ;;
    *)         	    exit 0 ;;
  esac
fi

#
#  "Process" GET* requests - return hard-coded value
#
echo "$RET"
case "$RET" in
  $PLACE.1.0)     echo "string";    echo "Life, the Universe, and Everything"; exit 0 ;;
  $PLACE.2.1.2.1) echo "integer";   echo "42";                                 exit 0 ;;
  $PLACE.2.1.3.1) echo "objectid";  echo "$PLACE.99";                          exit 0 ;;
  $PLACE.3.0)     echo "timeticks"; echo "363136200";                          exit 0 ;;
  $PLACE.4.0)     echo "ipaddress"; echo "127.0.0.1";                          exit 0 ;;
  $PLACE.5.0)     echo "counter";   echo "42";                                 exit 0 ;;
  $PLACE.6.0)     echo "gauge";     echo "42";                                 exit 0 ;;
  *)              echo "string";    echo "ack... $RET $REQ";                   exit 0 ;;  # Should not happen
esac