# vim: ts=8:sw=4:sts=4:et:ft=sh:
# {{{ check for availability of program(s)
# usage example:
#       check4progs [-s,-q,--quiet,--silent] arg [arg .... argn]
#
# with option given either of:
#       -s,-q,--quiet,--silent
#
# check for available progs but produce no output
check4progs() {
    [ -n "${ZSH_VERSION}" ] && emulate -L sh
    local RTN=0
    local oldifs="${IFS}"
    local ARG d found
    local VERBOSE=1

    case ${1} in
        -q | -s | --quiet | --silent)
            VERBOSE=0
            shift 1
            ;;

        *)
            ;;
    esac

    while [ $# -gt 0 ]
    do
        ARG="$1"
        shift

        found=0
        IFS=:
        for d in $PATH
        do
            if [ -x "${d}/${ARG}" ]
            then
                found=1
                break
            fi
        done
        IFS="${oldifs}"

        # check for availability
        if [ ${found} -eq 0 ]
        then
            if [ ${VERBOSE} -eq 1 ]
            then
                printf "%s: binary not found\n" "${ARG}" >&2
            fi
            RTN=1
        fi
    done

    # return non zero, if at least one prog is missing!
    return $RTN
}
# }}}