From bc43a7c66c60b6b8305e6a5f55c41cdcd82ceb53 Mon Sep 17 00:00:00 2001
From: Ed Nielsen <ed@edcore.dk>
Date: Wed, 18 Mar 2026 16:47:56 +0100
Subject: [PATCH] Add main script (NodeFox)

---
 update-manager.sh | 127 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 127 insertions(+)
 create mode 100755 update-manager.sh

diff --git a/update-manager.sh b/update-manager.sh
new file mode 100755
index 0000000..89b5ef9
--- /dev/null
+++ b/update-manager.sh
@@ -0,0 +1,127 @@
+#!/usr/bin/env bash
+
+CONFIG_FILE="/etc/update-manager.conf"
+[[ -f "$CONFIG_FILE" ]] || CONFIG_FILE="./update-manager.conf"
+
+if [[ -f "$CONFIG_FILE" ]]; then
+    # shellcheck disable=SC1090
+    source "$CONFIG_FILE"
+fi
+
+DEFAULT_HOSTS_FILE="${HOSTS_FILE:-/opt/update-manager/hosts.conf}"
+SSH_OPTIONS="${SSH_OPTIONS:--o BatchMode=yes -o ConnectTimeout=5}"
+
+########################################
+# Ensure hosts file exists
+########################################
+
+ensure_hosts_file() {
+    if [[ ! -f "$DEFAULT_HOSTS_FILE" ]]; then
+        echo "Creating example hosts file: $DEFAULT_HOSTS_FILE"
+
+        mkdir -p "$(dirname "$DEFAULT_HOSTS_FILE")"
+
+        cat > "$DEFAULT_HOSTS_FILE" <<'EOF'
+# Example hosts file
+# Format:
+# name          ip              user
+#
+# server1       192.168.1.10    user
+# server2       192.168.1.20    user
+# server3       10.0.0.5        root
+EOF
+    fi
+}
+
+########################################
+# Helpers
+########################################
+
+get_hosts_file() {
+    if [[ -n "$2" ]]; then
+        echo "$2"
+    else
+        echo "$DEFAULT_HOSTS_FILE"
+    fi
+}
+
+usage() {
+    cat <<USAGE
+Usage:
+  $0 check [hosts_file]
+
+Examples:
+  $0 check
+  $0 check /path/to/hosts.conf
+  HOSTS_FILE=/path/to/hosts.conf $0 check
+USAGE
+}
+
+########################################
+# Check single host
+########################################
+
+check_host() {
+    local name="$1"
+    local ip="$2"
+    local user="$3"
+    local result
+    local rc
+
+    result=$(ssh -n $SSH_OPTIONS "${user}@${ip}" \
+        "apt list --upgradable 2>/dev/null | sed '/^Listing/d'" 2>&1)
+    rc=$?
+
+    printf "===== %s (%s) =====\n" "$name" "$ip"
+
+    if [[ $rc -ne 0 ]]; then
+        echo "❌ connection failed"
+        echo "$result"
+        echo
+        return
+    fi
+
+    if [[ -z "$result" ]]; then
+        echo "Up-to-date"
+    else
+        echo "$result"
+    fi
+
+    echo
+}
+
+########################################
+# Check all hosts
+########################################
+
+check_all() {
+    local hosts_file="$1"
+
+    ensure_hosts_file
+
+    while IFS= read -r line; do
+        [[ -z "$line" || "$line" =~ ^[[:space:]]*# ]] && continue
+
+        local name ip user
+        read -r name ip user <<< "$line"
+
+        [[ -z "$name" || -z "$ip" || -z "$user" ]] && continue
+
+        check_host "$name" "$ip" "$user"
+    done < "$hosts_file"
+}
+
+########################################
+# Main
+########################################
+
+case "${1:-}" in
+    check)
+        HOSTS_FILE_TO_USE="$(get_hosts_file "$@")"
+        check_all "$HOSTS_FILE_TO_USE"
+        ;;
+    *)
+        usage
+        exit 1
+        ;;
+esac