From 429a70b41d453470d312fea39518e9d7f961db57 Mon Sep 17 00:00:00 2001
From: Frank Brehm <frank.brehm@pixelpark.com>
Date: Thu, 23 Nov 2023 16:21:50 +0100
Subject: [PATCH] Adding postinstall-scripts/update-networkmanager

---
 postinstall-scripts/update-networkmanager | 198 ++++++++++++++++++++++
 1 file changed, 198 insertions(+)
 create mode 100644 postinstall-scripts/update-networkmanager

diff --git a/postinstall-scripts/update-networkmanager b/postinstall-scripts/update-networkmanager
new file mode 100644
index 0000000..48c91b4
--- /dev/null
+++ b/postinstall-scripts/update-networkmanager
@@ -0,0 +1,198 @@
+#!/bin/bash
+
+set -e
+set -u
+
+BASE_NAME="$( basename ${0} )"
+MY_REAL_NAME=$( readlink -f $0 )
+BIN_DIR=$( dirname "${MY_REAL_NAME}" )
+BASE_DIR=$( dirname "${BIN_DIR}" )
+
+if [[ -f "${BIN_DIR}/functions.rc" ]] ; then
+    . "${BIN_DIR}/functions.rc"
+else
+    echo "Bash resource file '${BIN_DIR}/functions.rc' not found" >&2
+    exit 5
+fi
+
+FQDN=$( hostname -f )
+NM_CFG_DIR='/etc/NetworkManager/system-connections'
+
+detect_color
+
+#------------------------------------------------------------------------------
+DESCRIPTION=$( cat <<-EOF
+	Generate a valid configuration for the NetworkManager.
+
+	EOF
+)
+
+#------------------------------------------------------------------------------
+usage() {
+
+    cat <<-EOF
+	Usage: ${BASE_NAME} ${STD_USAGE}
+	       ${BASE_NAME} [-h|--help]
+	       ${BASE_NAME} [-V|--version]
+
+	    Options:
+	EOF
+
+	echo "${STD_USAGE_MSG}"
+}
+
+#------------------------------------------------------------------------------
+get_options() {
+
+    local tmp=
+    local short_options="${STD_SHORT_OPTIONS}"
+    local long_options="${STD_LONG_OPTIONS}"
+
+    set +e
+    tmp=$( getopt -o "${short_options}" --long "${long_options}" -n "${BASE_NAME}" -- "$@" )
+    if [[ $? != 0 ]] ; then
+        echo "" >&2
+        usage >&2
+        exit 1
+    fi
+    set -e
+
+    # Note the quotes around `$TEMP': they are essential!
+    eval set -- "${tmp}"
+    eval_common_options "$@"
+    if [[ "${DEBUG}" == 'y' ]] ; then
+        declare -p REMAINING_OPTS
+        declare -p REMAINING_ARGS
+    fi
+
+    local len="${#REMAINING_OPTS[*]}"
+    local i="0"
+    local j=
+    local arg=
+    while [[ "$i" -lt "${len}" ]] ; do
+
+        arg="${REMAINING_OPTS[$i]}"
+
+        case "${arg}" in
+            *)  echo -e "Internal error - option '${RED}${arg}${NORMAL} was wrong!"
+                exit 1
+                ;;
+        esac
+    done
+
+}
+
+#------------------------------------------------------------------------------
+get_primary_device() {
+
+    local primary_device=$( facter networking.primary )
+
+    if [[ -z "${primary_device}" ]] ; then
+        error "Did not found the primary networking device"
+        exit 5
+    fi
+
+    debug "Primary networking device is: '${CYAN}${primary_device}${NORMAL}'."
+    echo "${primary_device}"
+
+}
+
+#------------------------------------------------------------------------------
+generate_nm_file() {
+
+    local primary_device=$( get_primary_device )
+    local dev_basename="${primary_device}.nmconnection"
+    local dev_file="${NM_CFG_DIR}/${dev_basename}"
+    local if_uuid=$( uuidgen -r )
+    local ip_primary=$( ip -br -o address show dev "${primary_device}" | awk '{print $3}' )
+    local default_gateway=$( ip -br -o route show | grep ^default | awk '{print $3}' )
+
+    local -a nameservers=()
+    local ns
+    for ns in $(cat /etc/resolv.conf | grep '^nameserver' | awk '{print $2}' ) ; do
+        nameservers+=( "${ns}" )
+    done
+    local ns_list=""
+    for ns in "${nameservers[@]}" ; do
+        ns_list+="${ns};"
+    done
+
+    local -a search_domains=()
+    local domain
+    for domain in $(cat /etc/resolv.conf | grep '^search' | sed -e 's/^search[ 	][ 	]*//' ) ; do
+        search_domains+=( "${domain}" )
+    done
+    if [[ "${#search_domains[*]}" == "0" ]] ; then
+        search_domains=( "pixelpark.net" "pixelpark.com" )
+    fi
+    local domain_list=""
+    for domain in "${search_domains[@]}" ; do
+        domain_list+="${domain};"
+    done
+
+    local dns_options="timeout:1;attempts:1;"
+    if grep -q '^options' /etc/resolv.conf ; then
+        dns_options=$( grep '^options' /etc/resolv.conf | \
+                       sed -e 's/^options[ 	][ 	]*//' -e 's/[ 	][ 	]*/;/g' )
+        dns_options+=';'
+    fi
+
+    local file_content=$( cat <<-EOF
+	[connection]
+	id=${primary_device}
+	uuid=${if_uuid}
+	type=ethernet
+	interface-name=${primary_device}
+
+	[ethernet]
+
+	[ipv4]
+	method=manual
+	address1=${ip_primary},${default_gateway}
+	dns=${ns_list}
+	dns-options=${dns_options}
+	dns-search=${domain_list}
+
+	[ipv6]
+	addr-gen-mode=eui64
+	method=disabled
+
+	[proxy]
+	EOF
+    )
+
+    info "Writing '${CYAN}${dev_file}${NORMAL}' ..."
+    debug "Generated content of '${CYAN}${dev_file}${NORMAL}':\n${file_content}"
+
+    if [[ "${SIMULATE}" != "y" ]] ; then
+        echo -n "${file_content}" > "${dev_file}"
+    fi
+
+}
+
+################################################################################
+##
+## Main
+##
+################################################################################
+
+#------------------------------------------------------------------------------
+main() {
+
+    get_options "$@"
+    set_locale "en_US.utf8"
+
+    empty_line
+    info "Trying to fix ${CYAN}NetworkManager config${NORMAL} ..."
+    empty_line
+
+    check_for_root
+    generate_nm_file
+
+}
+
+main "$@"
+
+exit 0
+
+# vim: list
-- 
2.39.5