Start a program using mpirun with multi-user-friendly options

mpinice.sh

#!/bin/bash
{

NPROCS=4
NICE=10
STDOUT=/dev/stdout

print_usage()
{
    cat <<END
Usage: `basename $0` [OPTIONS] program args
Start a program using mpirun with multi-user-friendly options

   -h
                 This help message
   -np <procs>
                 Number of processors to run on [default: ${NPROCS}]
   -o <filename>
                 Redirect stdout to filename [default: ${STDOUT}]
   -omp <threads>
                 Number of OpenMP threads [default: ${OMP_NUM_THREADS}]
   -p <niceness>
                 Add integer niceness [default: ${NICE}]

END
}

if  [ $# -lt 1 ] ; then
    print_usage
    exit 1
fi

while [ $# -ge 1 ] ; do
    case $1 in
        -h)
            print_usage
            exit 1
            ;;
        -np)
            shift
            NPROCS=$1
            ;;
        -o)
            shift
            STDOUT=$1
            ;;
        -omp)
            shift
            export OMP_NUM_THREADS=$1
            ;;
        -p)
            shift
            NICE=$1
            ;;
        *)
            break
            ;;
    esac
    shift
done

if  [ $# -lt 1 ] ; then
    echo "ERROR: no program specified"
    exit 1
fi

nice -n $NICE mpirun --bind-to none -np $NPROCS $* > $STDOUT

exit
}