Bash command wrapper with partial option parsing.

cmd_wrapper.sh

#!/bin/bash
cmd=mycmd

# parse a subset of all options
while true; do
  while getopts c:u:b: arg 2>/dev/null; do
    case $arg in
    "a")
      arga=$OPTARG
    ;;  
    "b") 
      argb=$OPTARG
      ;;  
    "c")
      argc=$OPTARG
      ;;  
    esac
  done
  # advance to the next option when getopts fails to parse the current option
  ((OPTIND++))
  [ $OPTIND -gt $# ] && break
done

exec $cmd $@