#!/bin/bash

function print_help()
{
  echo "usage: mpilog [options] [command]" && echo && \
  echo "options: -n <procs>  set number of processes" && \
  echo "         -l <file>   set log file basename" && \
  echo "         -h          display this help and exit" && echo;
}

while getopts n:l:h OPT;
do
  case $OPT in
  n) np=$OPTARG ;;
  l) lf=$OPTARG ;;
  h) print_help && exit 0 ;;
  \?) print_help && exit 1
  esac;
done;

test -z "$lf" && lf=run; rm -f $lf.err $lf.out $lf.log
mpirun -n $np ${@:$OPTIND:$#} -l$lf.log 2>$lf.err 1>$lf.out & 
tail --pid=$! -s 0.1 -F $lf.log