dracut/modules.d/95resume/module-setup.sh

#!/bin/bash
# -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
# ex: ts=8 sw=4 sts=4 et filetype=sh

# called by dracut
check() {
    # No point trying to support resume, if no swap partition exist
    [[ $hostonly ]] || [[ $mount_needs ]] && {
        for fs in "${host_fs_types[@]}"; do
            [[ $fs = swap ]] && return 0
        done
        return 255
    }

    return 0
}

# called by dracut
install() {
    local _bin
    # Optional uswsusp support
    for _bin in /usr/sbin/resume /usr/lib/suspend/resume /usr/lib/uswsusp/resume
    do
        [[ -x "${_bin}" ]] && {
            inst "${_bin}" /usr/sbin/resume
            [[ -f /etc/suspend.conf ]] && inst /etc/suspend.conf
            break
        }
    done

    if ! dracut_module_included "systemd"; then
        inst_hook cmdline 10 "$moddir/parse-resume.sh"
    else
        inst_script "$moddir/parse-resume.sh" /lib/dracut/parse-resume.sh
        inst_hook pre-udev 30 "$moddir/resume-genrules.sh"
    fi

    inst_script  "$moddir/resume.sh" /lib/dracut/resume.sh
}