prosody-modules
dc058fcc3fe3
mod_audit/mod_audit.lua

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mod_audit/mod_audit.lua @ 5326:dc058fcc3fe3

mod_audit: Improve filtering options and add documentation to README
author Matthew Wild <mwild1@gmail.com>
date Fri, 07 Apr 2023 13:44:18 +0100
parent 5325:11b37063d80a
child 5327:7e3862a26e55
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1 module:set_global();
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2
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3 local audit_log_limit = module:get_option_number("audit_log_limit", 10000);
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4 local cleanup_after = module:get_option_string("audit_log_expires_after", "2w");
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5
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6 local attach_ips = module:get_option_boolean("audit_log_ips", true);
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7 local attach_ipv4_prefix = module:get_option_number("audit_log_ipv4_prefix", nil);
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8 local attach_ipv6_prefix = module:get_option_number("audit_log_ipv6_prefix", nil);
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9
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10 local have_geoip, geoip = pcall(require, "geoip.country");
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11 local attach_location = have_geoip and module:get_option_boolean("audit_log_location", true);
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12
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13 local geoip4_country, geoip6_country;
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14 if have_geoip and attach_location then
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15 geoip4_country = geoip.open(module:get_option_string("geoip_ipv4_country", "/usr/share/GeoIP/GeoIP.dat"));
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16 geoip6_country = geoip.open(module:get_option_string("geoip_ipv6_country", "/usr/share/GeoIP/GeoIPv6.dat"));
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17 end
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18
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19 local time_now = os.time;
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20 local ip = require "util.ip";
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21 local st = require "util.stanza";
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22 local moduleapi = require "core.moduleapi";
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23
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24 local host_wide_user = "@";
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25
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26 local stores = {};
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27
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28 local function get_store(self, host)
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29 local store = rawget(self, host);
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30 if store then
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31 return store
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32 end
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33 store = module:context(host):open_store("audit", "archive");
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34 rawset(self, host, store);
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35 return store;
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36 end
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37
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38 setmetatable(stores, { __index = get_store });
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39
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40 local function get_ip_network(ip_addr)
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41 local _ip = ip.new_ip(ip_addr);
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42 local proto = _ip.proto;
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43 local network;
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44 if proto == "IPv4" and attach_ipv4_prefix then
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45 network = ip.truncate(_ip, attach_ipv4_prefix).normal.."/"..attach_ipv4_prefix;
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46 elseif proto == "IPv6" and attach_ipv6_prefix then
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47 network = ip.truncate(_ip, attach_ipv6_prefix).normal.."/"..attach_ipv6_prefix;
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48 end
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49 return network;
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50 end
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51
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52 local function session_extra(session)
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53 local attr = {
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54 xmlns = "xmpp:prosody.im/audit",
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55 };
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56 if session.id then
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57 attr.id = session.id;
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58 end
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59 if session.type then
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60 attr.type = session.type;
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61 end
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62 local stanza = st.stanza("session", attr);
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63 if attach_ips and session.ip then
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64 local remote_ip, network = session.ip;
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65 if attach_ipv4_prefix or attach_ipv6_prefix then
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66 network = get_ip_network(remote_ip);
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67 end
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68 stanza:text_tag("remote-ip", network or remote_ip);
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69 end
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70 if attach_location and session.ip then
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71 local remote_ip = ip.new(session.ip);
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72 local geoip_country = ip.proto == "IPv6" and geoip6_country or geoip4_country;
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73 stanza:tag("location", {
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74 country = geoip_country:query_by_addr(remote_ip.normal);
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75 }):up();
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76 end
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77 if session.client_id then
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78 stanza:text_tag("client", session.client_id);
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79 end
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80 return stanza
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81 end
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82
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83 local function audit(host, user, source, event_type, extra)
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84 if not host or host == "*" then
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85 error("cannot log audit events for global");
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86 end
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87 local user_key = user or host_wide_user;
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88
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89 local attr = {
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90 ["source"] = source,
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91 ["type"] = event_type,
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92 };
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93 if user_key ~= host_wide_user then
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94 attr.user = user_key;
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95 end
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96 local stanza = st.stanza("audit-event", attr);
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97 if extra then
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98 if extra.session then
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99 local child = session_extra(extra.session);
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100 if child then
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101 stanza:add_child(child);
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102 end
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103 end
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104 if extra.custom then
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105 for _, child in ipairs(extra.custom) do
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106 if not st.is_stanza(child) then
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107 error("all extra.custom items must be stanzas")
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108 end
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109 stanza:add_child(child);
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110 end
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111 end
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112 end
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113
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114 local id, err = stores[host]:append(nil, nil, stanza, extra and extra.timestamp or time_now(), user_key);
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115 if err then
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116 module:log("error", "failed to persist audit event: %s", err);
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117 return
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118 else
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119 module:log("debug", "persisted audit event %s as %s", stanza:top_tag(), id);
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120 end
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121 end
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122
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123 function moduleapi.audit(module, user, event_type, extra)
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124 audit(module.host, user, "mod_" .. module:get_name(), event_type, extra);
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125 end
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126
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127 function module.command(_arg)
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128 local jid = require "util.jid";
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129 local arg = require "util.argparse".parse(_arg, { value_params = { "limit" } });
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130 local query_user, host = jid.prepped_split(arg[1]);
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131 if not host then
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132 print("EE: Please supply the host for which you want to show events");
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133 return 1;
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134 elseif not prosody.hosts[host] then
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135 print("EE: Unknown host: "..host);
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136 return 1;
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137 end
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138
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139 require "core.storagemanager".initialize_host(host);
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140 local store = stores[host];
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141 local c = 0;
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142
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143 if arg.global then
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144 if query_user then
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145 print("WW: Specifying a user account is incompatible with --global. Showing only global events.");
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146 end
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147 query_user = "@";
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148 end
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149
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150 local results, err = store:find(nil, {
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151 with = query_user;
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152 limit = arg.limit and tonumber(arg.limit) or nil;
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153 reverse = true;
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154 })
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155 if not results then
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156 print("EE: Failed to query audit log: "..tostring(err));
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157 return 1;
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158 end
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159
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160 local colspec = {
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161 { title = "Date", key = "when", width = 19, mapper = function (when) return os.date("%Y-%m-%d %R:%S", when); end };
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162 { title = "Source", key = "source", width = "2p" };
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163 { title = "Event", key = "event_type", width = "2p" };
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164 };
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165
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166 if arg.show_user ~= false and (not arg.global and not query_user) or arg.show_user then
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167 table.insert(colspec, {
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168 title = "User", key = "username", width = "2p",
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169 mapper = function (user)
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170 if user == "@" then return ""; end
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171 if user:sub(-#host-1, -1) == ("@"..host) then
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172 return (user:gsub("@.+$", ""));
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173 end
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174 end;
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175 });
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176 end
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177 if arg.show_ip ~= false and (not arg.global and attach_ips) or arg.show_ip then
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178 table.insert(colspec, {
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179 title = "IP", key = "ip", width = "2p";
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180 });
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181 end
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182 if arg.show_location ~= false and (not arg.global and attach_location) or arg.show_location then
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183 table.insert(colspec, {
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184 title = "Location", key = "country", width = 2;
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185 });
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186 end
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187
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188 local row, width = require "util.human.io".table(colspec);
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189
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190 print(string.rep("-", width));
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191 print(row());
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192 print(string.rep("-", width));
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193 for _, entry, when, user in results do
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194 if arg.global ~= false or user ~= "@" then
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195 c = c + 1;
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196 print(row({
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197 when = when;
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198 source = entry.attr.source;
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199 event_type = entry.attr.type:gsub("%-", " ");
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200 username = user;
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201 ip = entry:get_child_text("remote-ip");
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202 location = entry:find("location@country");
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203 }));
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204 end
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205 end
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206 print(string.rep("-", width));
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207 print(("%d records displayed"):format(c));
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208 end