Initial s390-tools-2.0.0 import

This commit is based on the s390-tools-1.39.0 version.

Changes on top of s390-tools-1.39.0:

 - Add MIT license to all source files
 - Add LICENSE file
 - Transform REAMDE to README.md (markdown)
 - Add AUTHORS.md file
 - Add CONTRIBUTING.md file
 - Move changelog from README to CHANGELOG.md file

Reviewed-by: Stefan Haberland <sth@linux.vnet.ibm.com>
Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>

zdev/dracut/95zdev/module-setup.sh

@@ -0,0 +1,56 @@
+#!/bin/bash
+#
+# Copyright IBM Corp. 2016, 2017
+#
+# s390-tools is free software; you can redistribute it and/or modify
+# it under the terms of the MIT license. See LICENSE for details.
+#
+#
+# 95zdev/module_setup.sh
+#   This module installs configuration files (udev rules and modprobe.conf
+#   files) required to enable the root device on s390. It will only work when
+#   the root device was configured using the chzdev tool.
+#
+
+check() {
+    local _arch=$(uname -m)
+
+    # Ensure that we're running on s390
+    [ "$_arch" = "s390" -o "$_arch" = "s390x" ] || return 1
+
+    # Ensure that required tools are available
+    require_binaries chzdev lszdev || return 1
+
+    return 0
+}
+
+depends() {
+    return 0
+}
+
+installkernel() {
+    local _modules=$(lszdev --by-path / --columns MODULES --no-headings)
+
+    [ ! -z "$_modules" ] && instmods $_modules
+}
+
+install() {
+    local _tempfile=$(mktemp dracut-zdev.XXXX)
+
+    if chzdev --export - --persistent --by-path / >/dev/null 2>&1 ; then
+        # Use persistent configuration
+        chzdev --export "$_tempfile" --persistent --by-path / --quiet --type
+    else
+        # Use active configuration
+        chzdev --export "$_tempfile" --active --by-path / --quiet --type
+        sed -i -e 's/active/persistent/g' "$_tempfile"
+    fi
+
+    # Apply via --import to prevent other devices from being configured
+    chzdev --import "$_tempfile" --persistent --base "/etc=$initdir/etc" \
+           --yes --quiet --no-root-update --force >/dev/null
+
+    rm -f "$_tempfile"
+
+    return 0
+}