Mini Shell

#!/usr/bin/bash

# called by dracut
check() {
    require_binaries sed grep || return 1

    # do not add this module by default
    return 255
}

# called by dracut
depends() {
    echo dbus bash
    return 0
}

# called by dracut
installkernel() {
    return 0
}

# called by dracut
install() {
    local _nm_version

    _nm_version=${NM_VERSION:-$(NetworkManager --version)}

    # We don't need `ip` but having it is *really* useful for people debugging
    # in an emergency shell.
    inst_multiple ip sed grep

    inst NetworkManager
    inst_multiple -o /usr/{lib,libexec}/nm-initrd-generator
    inst_multiple -o /usr/{lib,libexec}/nm-daemon-helper
    inst_multiple -o teamd dhclient
    inst_hook cmdline 99 "$moddir/nm-config.sh"
    if dracut_module_included "systemd"; then

        inst "$dbussystem"/org.freedesktop.NetworkManager.conf
        inst_multiple nmcli nm-online

        # teaming support under systemd+dbus
        inst_multiple -o \
            "$dbussystem"/teamd.conf \
            "$dbussystemconfdir"/teamd.conf

        # Install a configuration snippet to prevent the automatic creation of
        # "Wired connection #" DHCP connections for Ethernet interfaces
        inst_simple "$moddir"/initrd-no-auto-default.conf /usr/lib/NetworkManager/conf.d/

        inst_simple "$moddir"/nm-initrd.service "$systemdsystemunitdir"/nm-initrd.service
        inst_simple "$moddir"/nm-wait-online-initrd.service "$systemdsystemunitdir"/nm-wait-online-initrd.service

        # Adding default link
        inst_multiple -o "${systemdnetwork}/99-default.link"
        [[ $hostonly ]] && inst_multiple -H -o "${systemdnetworkconfdir}/*.link"

        $SYSTEMCTL -q --root "$initdir" enable nm-initrd.service
    fi

    inst_hook initqueue/settled 99 "$moddir/nm-run.sh"

    inst_rules 85-nm-unmanaged.rules
    inst_libdir_file "NetworkManager/$_nm_version/libnm-device-plugin-team.so"
    inst_simple "$moddir/nm-lib.sh" "/lib/nm-lib.sh"

    if [[ -x "$initdir/usr/sbin/dhclient" ]]; then
        inst_multiple -o /usr/{lib,libexec}/nm-dhcp-helper
    elif ! [[ -e "$initdir/etc/machine-id" ]]; then
        # The internal DHCP client silently fails if we
        # have no machine-id
        systemd-machine-id-setup --root="$initdir"
    fi

    # We don't install the ifcfg files from the host automatically.
    # But the user might choose to include them, so we pull in the machinery to read them.
    inst_libdir_file "NetworkManager/$_nm_version/libnm-settings-plugin-ifcfg-rh.so"

    _arch=${DRACUT_ARCH:-$(uname -m)}

    inst_libdir_file {"tls/$_arch/",tls/,"$_arch/",}"libnss_dns.so.*" \
        {"tls/$_arch/",tls/,"$_arch/",}"libnss_mdns4_minimal.so.*"
}