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## template:jinja
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#!/bin/sh
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set -f
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LOG=""
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DEBUG_LEVEL=1
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LOG_D="/run/cloud-init"
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ENABLE="enabled"
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DISABLE="disabled"
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FOUND="found"
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NOTFOUND="notfound"
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RUN_ENABLED_FILE="$LOG_D/$ENABLE"
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{% if variant in ["suse"] %}
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CLOUD_SYSTEM_TARGET="/usr/lib/systemd/system/cloud-init.target"
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{% else %}
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CLOUD_SYSTEM_TARGET="/lib/systemd/system/cloud-init.target"
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{% endif %}
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CLOUD_TARGET_NAME="cloud-init.target"
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# lxc sets 'container', but lets make that explicitly a global
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CONTAINER="${container}"
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debug() {
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local lvl="$1"
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shift
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[ "$lvl" -gt "$DEBUG_LEVEL" ] && return
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if [ -z "$LOG" ]; then
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local log="$LOG_D/${0##*/}.log"
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{ [ -d "$LOG_D" ] || mkdir -p "$LOG_D"; } &&
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{ : > "$log"; } >/dev/null 2>&1 && LOG="$log" ||
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LOG="/dev/kmsg"
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fi
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echo "$@" >> "$LOG"
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}
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etc_file() {
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local pprefix="${1:-/etc/cloud/cloud-init.}"
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_RET="unset"
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[ -f "${pprefix}$ENABLE" ] && _RET="$ENABLE" && return 0
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[ -f "${pprefix}$DISABLE" ] && _RET="$DISABLE" && return 0
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return 0
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}
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read_proc_cmdline() {
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# return /proc/cmdline for non-container, and /proc/1/cmdline for container
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local ctname="systemd"
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if [ -n "$CONTAINER" ] && ctname=$CONTAINER ||
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systemd-detect-virt --container --quiet; then
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if { _RET=$(tr '\0' ' ' < /proc/1/cmdline); } 2>/dev/null; then
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_RET_MSG="container[$ctname]: pid 1 cmdline"
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return
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fi
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_RET=""
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_RET_MSG="container[$ctname]: pid 1 cmdline not available"
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return 0
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fi
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_RET_MSG="/proc/cmdline"
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read _RET < /proc/cmdline
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}
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kernel_cmdline() {
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local cmdline="" tok=""
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if [ -n "${KERNEL_CMDLINE+x}" ]; then
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# use KERNEL_CMDLINE if present in environment even if empty
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cmdline=${KERNEL_CMDLINE}
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debug 1 "kernel command line from env KERNEL_CMDLINE: $cmdline"
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elif read_proc_cmdline; then
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read_proc_cmdline && cmdline="$_RET"
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debug 1 "kernel command line ($_RET_MSG): $cmdline"
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fi
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_RET="unset"
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cmdline=" $cmdline "
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tok=${cmdline##* cloud-init=}
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[ "$tok" = "$cmdline" ] && _RET="unset"
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tok=${tok%% *}
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[ "$tok" = "$ENABLE" -o "$tok" = "$DISABLE" ] && _RET="$tok"
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return 0
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}
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default() {
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_RET="$ENABLE"
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}
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check_for_datasource() {
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local ds_rc=""
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{% if variant in ["redhat", "fedora", "centos"] %}
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local dsidentify="/usr/libexec/cloud-init/ds-identify"
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{% else %}
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local dsidentify="/usr/lib/cloud-init/ds-identify"
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{% endif %}
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if [ ! -x "$dsidentify" ]; then
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debug 1 "no ds-identify in $dsidentify. _RET=$FOUND"
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return 0
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fi
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$dsidentify
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ds_rc=$?
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debug 1 "ds-identify rc=$ds_rc"
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if [ "$ds_rc" = "0" ]; then
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_RET="$FOUND"
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debug 1 "ds-identify _RET=$_RET"
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return 0
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fi
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_RET="$NOTFOUND"
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debug 1 "ds-identify _RET=$_RET"
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return 1
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}
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main() {
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local normal_d="$1" early_d="$2" late_d="$3"
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local target_name="multi-user.target" gen_d="$early_d"
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local link_path="$gen_d/${target_name}.wants/${CLOUD_TARGET_NAME}"
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local ds="$NOTFOUND"
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debug 1 "$0 normal=$normal_d early=$early_d late=$late_d"
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debug 2 "$0 $*"
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local search result="error" ret=""
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for search in kernel_cmdline etc_file default; do
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if $search; then
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debug 1 "$search found $_RET"
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[ "$_RET" = "$ENABLE" -o "$_RET" = "$DISABLE" ] &&
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result=$_RET && break
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else
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ret=$?
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debug 0 "search $search returned $ret"
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fi
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done
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# enable AND ds=found == enable
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# enable AND ds=notfound == disable
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# disable || <any> == disabled
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if [ "$result" = "$ENABLE" ]; then
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debug 1 "checking for datasource"
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check_for_datasource
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ds=$_RET
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if [ "$ds" = "$NOTFOUND" ]; then
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debug 1 "cloud-init is enabled but no datasource found, disabling"
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result="$DISABLE"
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fi
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fi
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if [ "$result" = "$ENABLE" ]; then
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if [ -e "$link_path" ]; then
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debug 1 "already enabled: no change needed"
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else
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[ -d "${link_path%/*}" ] || mkdir -p "${link_path%/*}" ||
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debug 0 "failed to make dir $link_path"
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if ln -snf "$CLOUD_SYSTEM_TARGET" "$link_path"; then
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debug 1 "enabled via $link_path -> $CLOUD_SYSTEM_TARGET"
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else
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ret=$?
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debug 0 "[$ret] enable failed:" \
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"ln $CLOUD_SYSTEM_TARGET $link_path"
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fi
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fi
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: > "$RUN_ENABLED_FILE"
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elif [ "$result" = "$DISABLE" ]; then
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if [ -f "$link_path" ]; then
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if rm -f "$link_path"; then
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debug 1 "disabled. removed existing $link_path"
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else
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ret=$?
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debug 0 "[$ret] disable failed, remove $link_path"
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fi
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else
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debug 1 "already disabled: no change needed [no $link_path]"
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fi
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if [ -e "$RUN_ENABLED_FILE" ]; then
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rm -f "$RUN_ENABLED_FILE"
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fi
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else
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debug 0 "unexpected result '$result' 'ds=$ds'"
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ret=3
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fi
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return $ret
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}
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main "$@"
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# vi: ts=4 expandtab
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