Add package update count and reboot pending to host server info card

bin/malpd

@@ -169,6 +169,49 @@ def read_virtual_machines
   end
 end
 
+def read_os_id
+  return nil unless File.exist?("/etc/os-release")
+  File.readlines("/etc/os-release").each do |line|
+    if line =~ /^ID=(.+)$/
+      return $1.strip.delete('"').downcase
+    end
+  end
+  nil
+end
+
+def apt_updates
+  out = `apt-get -s -o Debug::NoLocking=true upgrade 2>/dev/null`
+  count = 0
+  out.each_line do |line|
+    count += 1 if line.start_with?("Inst ")
+  end
+  count
+end
+
+def apt_reboot_pending
+  File.exist?("/var/run/reboot-required")
+end
+
+def dnf_updates
+  out = `dnf -q check-update 2>/dev/null`
+  status = $?.exitstatus
+  return 0 if status == 0
+  return nil unless status == 100
+  count = 0
+  out.each_line do |line|
+    line = line.strip
+    next if line.empty?
+    next if line.start_with?("Obsoleting", "Last metadata")
+    count += 1 if line.split(/\s+/).size >= 3
+  end
+  count
+end
+
+def dnf_reboot_pending
+  `dnf needs-restarting -r >/dev/null 2>&1`
+  $?.exitstatus == 1
+end
+
 def read_server_info
   info = { "type" => "server" }
 
@@ -181,6 +224,15 @@ def read_server_info
     end
   end
 
+  case read_os_id
+  when "ubuntu", "debian"
+    info["updates"] = apt_updates
+    info["reboot_pending"] = apt_reboot_pending
+  when "almalinux", "rocky", "rhel", "centos", "fedora"
+    info["updates"] = dnf_updates
+    info["reboot_pending"] = dnf_reboot_pending
+  end
+
   out = `stat -c %W / 2>/dev/null`.strip
   if out =~ /^\d+$/ && out.to_i > 0
     info["install_date"] = Time.at(out.to_i).strftime("%Y-%m-%d")