builtin/game/chatcommands.lua

   1 -- Minetest: builtin/chatcommands.lua
   2
   3 --
   4 -- Chat command handler
   5 --
   6
   7 core.chatcommands = {}
   8 function core.register_chatcommand(cmd, def)
   9         def = def or {}
  10         def.params = def.params or ""
  11         def.description = def.description or ""
  12         def.privs = def.privs or {}
  13         core.chatcommands[cmd] = def
  14 end
  15
  16 core.register_on_chat_message(function(name, message)
  17         local cmd, param = string.match(message, "^/([^ ]+) *(.*)")
  18         if not param then
  19                 param = ""
  20         end
  21         local cmd_def = core.chatcommands[cmd]
  22         if cmd_def then
  23                 local has_privs, missing_privs = core.check_player_privs(name, cmd_def.privs)
  24                 if has_privs then
  25                         cmd_def.func(name, param)
  26                 else
  27                         core.chat_send_player(name, "You don't have permission to run this command (missing privileges: "..table.concat(missing_privs, ", ")..")")
  28                 end
  29                 return true -- handled chat message
  30         end
  31         return false
  32 end)
  33
  34 --
  35 -- Chat commands
  36 --
  37 core.register_chatcommand("me", {
  38         params = "<action>",
  39         description = "chat action (eg. /me orders a pizza)",
  40         privs = {shout=true},
  41         func = function(name, param)
  42                 core.chat_send_all("* " .. name .. " " .. param)
  43         end,
  44 })
  45
  46 core.register_chatcommand("help", {
  47         privs = {},
  48         params = "(nothing)/all/privs/<cmd>",
  49         description = "Get help for commands or list privileges",
  50         func = function(name, param)
  51                 local format_help_line = function(cmd, def)
  52                         local msg = "/"..cmd
  53                         if def.params and def.params ~= "" then msg = msg .. " " .. def.params end
  54                         if def.description and def.description ~= "" then msg = msg .. ": " .. def.description end
  55                         return msg
  56                 end
  57                 if param == "" then
  58                         local msg = ""
  59                         local cmds = {}
  60                         for cmd, def in pairs(core.chatcommands) do
  61                                 if core.check_player_privs(name, def.privs) then
  62                                         table.insert(cmds, cmd)
  63                                 end
  64                         end
  65                         table.sort(cmds)
  66                         core.chat_send_player(name, "Available commands: "..table.concat(cmds, " "))
  67                         core.chat_send_player(name, "Use '/help <cmd>' to get more information, or '/help all' to list everything.")
  68                 elseif param == "all" then
  69                         local cmds = {}
  70                         for cmd, def in pairs(core.chatcommands) do
  71                                 if core.check_player_privs(name, def.privs) then
  72                                         table.insert(cmds, cmd)
  73                                 end
  74                         end
  75                         table.sort(cmds)
  76                         core.chat_send_player(name, "Available commands:")
  77                         for _, cmd in ipairs(cmds) do
  78                                 local def = core.chatcommands[cmd]
  79                                 core.chat_send_player(name, format_help_line(cmd, def))
  80                         end
  81                 elseif param == "privs" then
  82                         local privs = {}
  83                         for priv, def in pairs(core.registered_privileges) do
  84                                 table.insert(privs, priv)
  85                         end
  86                         table.sort(privs)
  87                         core.chat_send_player(name, "Available privileges:")
  88                         for _, priv in ipairs(privs) do
  89                                 local def = core.registered_privileges[priv]
  90                                 core.chat_send_player(name, priv..": "..def.description)
  91                         end
  92                 else
  93                         local cmd = param
  94                         def = core.chatcommands[cmd]
  95                         if not def then
  96                                 core.chat_send_player(name, "Command not available: "..cmd)
  97                         else
  98                                 core.chat_send_player(name, format_help_line(cmd, def))
  99                         end
 100                 end
 101         end,
 102 })
 103 core.register_chatcommand("privs", {
 104         params = "<name>",
 105         description = "print out privileges of player",
 106         func = function(name, param)
 107                 if param == "" then
 108                         param = name
 109                 else
 110                         --[[if not core.check_player_privs(name, {privs=true}) then
 111                                 core.chat_send_player(name, "Privileges of "..param.." are hidden from you.")
 112                                 return
 113                         end]]
 114                 end
 115                 core.chat_send_player(name, "Privileges of "..param..": "..core.privs_to_string(core.get_player_privs(param), ' '))
 116         end,
 117 })
 118 core.register_chatcommand("grant", {
 119         params = "<name> <privilege>|all",
 120         description = "Give privilege to player",
 121         privs = {},
 122         func = function(name, param)
 123                 if not core.check_player_privs(name, {privs=true}) and
 124                                 not core.check_player_privs(name, {basic_privs=true}) then
 125                         core.chat_send_player(name, "Your privileges are insufficient.")
 126                         return
 127                 end
 128                 local grantname, grantprivstr = string.match(param, "([^ ]+) (.+)")
 129                 if not grantname or not grantprivstr then
 130                         core.chat_send_player(name, "Invalid parameters (see /help grant)")
 131                         return
 132                 elseif not core.auth_table[grantname] then
 133                         core.chat_send_player(name, "Player "..grantname.." does not exist.")
 134                         return
 135                 end
 136                 local grantprivs = core.string_to_privs(grantprivstr)
 137                 if grantprivstr == "all" then
 138                         grantprivs = core.registered_privileges
 139                 end
 140                 local privs = core.get_player_privs(grantname)
 141                 local privs_known = true
 142                 for priv, _ in pairs(grantprivs) do
 143                         if priv ~= "interact" and priv ~= "shout" and priv ~= "interact_extra" and not core.check_player_privs(name, {privs=true}) then
 144                                 core.chat_send_player(name, "Your privileges are insufficient.")
 145                                 return
 146                         end
 147                         if not core.registered_privileges[priv] then
 148                                 core.chat_send_player(name, "Unknown privilege: "..priv)
 149                                 privs_known = false
 150                         end
 151                         privs[priv] = true
 152                 end
 153                 if not privs_known then
 154                         return
 155                 end
 156                 core.set_player_privs(grantname, privs)
 157                 core.log(name..' granted ('..core.privs_to_string(grantprivs, ', ')..') privileges to '..grantname)
 158                 core.chat_send_player(name, "Privileges of "..grantname..": "..core.privs_to_string(core.get_player_privs(grantname), ' '))
 159                 if grantname ~= name then
 160                         core.chat_send_player(grantname, name.." granted you privileges: "..core.privs_to_string(grantprivs, ' '))
 161                 end
 162         end,
 163 })
 164 core.register_chatcommand("revoke", {
 165         params = "<name> <privilege>|all",
 166         description = "Remove privilege from player",
 167         privs = {},
 168         func = function(name, param)
 169                 if not core.check_player_privs(name, {privs=true}) and
 170                                 not core.check_player_privs(name, {basic_privs=true}) then
 171                         core.chat_send_player(name, "Your privileges are insufficient.")
 172                         return
 173                 end
 174                 local revokename, revokeprivstr = string.match(param, "([^ ]+) (.+)")
 175                 if not revokename or not revokeprivstr then
 176                         core.chat_send_player(name, "Invalid parameters (see /help revoke)")
 177                         return
 178                 elseif not core.auth_table[revokename] then
 179                         core.chat_send_player(name, "Player "..revokename.." does not exist.")
 180                         return
 181                 end
 182                 local revokeprivs = core.string_to_privs(revokeprivstr)
 183                 local privs = core.get_player_privs(revokename)
 184                 for priv, _ in pairs(revokeprivs) do
 185                         if priv ~= "interact" and priv ~= "shout" and priv ~= "interact_extra" and not core.check_player_privs(name, {privs=true}) then
 186                                 core.chat_send_player(name, "Your privileges are insufficient.")
 187                                 return
 188                         end
 189                 end
 190                 if revokeprivstr == "all" then
 191                         privs = {}
 192                 else
 193                         for priv, _ in pairs(revokeprivs) do
 194                                 privs[priv] = nil
 195                         end
 196                 end
 197                 core.set_player_privs(revokename, privs)
 198                 core.log(name..' revoked ('..core.privs_to_string(revokeprivs, ', ')..') privileges from '..revokename)
 199                 core.chat_send_player(name, "Privileges of "..revokename..": "..core.privs_to_string(core.get_player_privs(revokename), ' '))
 200                 if revokename ~= name then
 201                         core.chat_send_player(revokename, name.." revoked privileges from you: "..core.privs_to_string(revokeprivs, ' '))
 202                 end
 203         end,
 204 })
 205 core.register_chatcommand("setpassword", {
 206         params = "<name> <password>",
 207         description = "set given password",
 208         privs = {password=true},
 209         func = function(name, param)
 210                 local toname, raw_password = string.match(param, "^([^ ]+) +(.+)$")
 211                 if not toname then
 212                         toname = string.match(param, "^([^ ]+) *$")
 213                         raw_password = nil
 214                 end
 215                 if not toname then
 216                         core.chat_send_player(name, "Name field required")
 217                         return
 218                 end
 219                 local actstr = "?"
 220                 if not raw_password then
 221                         core.set_player_password(toname, "")
 222                         actstr = "cleared"
 223                 else
 224                         core.set_player_password(toname, core.get_password_hash(toname, raw_password))
 225                         actstr = "set"
 226                 end
 227                 core.chat_send_player(name, "Password of player \""..toname.."\" "..actstr)
 228                 if toname ~= name then
 229                         core.chat_send_player(toname, "Your password was "..actstr.." by "..name)
 230                 end
 231         end,
 232 })
 233 core.register_chatcommand("clearpassword", {
 234         params = "<name>",
 235         description = "set empty password",
 236         privs = {password=true},
 237         func = function(name, param)
 238                 toname = param
 239                 if toname == "" then
 240                         core.chat_send_player(name, "Name field required")
 241                         return
 242                 end
 243                 core.set_player_password(toname, '')
 244                 core.chat_send_player(name, "Password of player \""..toname.."\" cleared")
 245         end,
 246 })
 247
 248 core.register_chatcommand("auth_reload", {
 249         params = "",
 250         description = "reload authentication data",
 251         privs = {server=true},
 252         func = function(name, param)
 253                 local done = core.auth_reload()
 254                 if done then
 255                         core.chat_send_player(name, "Done.")
 256                 else
 257                         core.chat_send_player(name, "Failed.")
 258                 end
 259         end,
 260 })
 261
 262 core.register_chatcommand("teleport", {
 263         params = "<X>,<Y>,<Z> | <to_name> | <name> <X>,<Y>,<Z> | <name> <to_name>",
 264         description = "teleport to given position",
 265         privs = {teleport=true},
 266         func = function(name, param)
 267                 -- Returns (pos, true) if found, otherwise (pos, false)
 268                 local function find_free_position_near(pos)
 269                         local tries = {
 270                                 {x=1,y=0,z=0},
 271                                 {x=-1,y=0,z=0},
 272                                 {x=0,y=0,z=1},
 273                                 {x=0,y=0,z=-1},
 274                         }
 275                         for _, d in ipairs(tries) do
 276                                 local p = {x = pos.x+d.x, y = pos.y+d.y, z = pos.z+d.z}
 277                                 local n = core.get_node_or_nil(p)
 278                                 if n and n.name then
 279                                         local def = core.registered_nodes[n.name]
 280                                         if def and not def.walkable then
 281                                                 return p, true
 282                                         end
 283                                 end
 284                         end
 285                         return pos, false
 286                 end
 287
 288                 local teleportee = nil
 289                 local p = {}
 290                 p.x, p.y, p.z = string.match(param, "^([%d.-]+)[, ] *([%d.-]+)[, ] *([%d.-]+)$")
 291                 p.x = tonumber(p.x)
 292                 p.y = tonumber(p.y)
 293                 p.z = tonumber(p.z)
 294                 teleportee = core.get_player_by_name(name)
 295                 if teleportee and p.x and p.y and p.z then
 296                         core.chat_send_player(name, "Teleporting to ("..p.x..", "..p.y..", "..p.z..")")
 297                         teleportee:setpos(p)
 298                         return
 299                 end
 300
 301                 local teleportee = nil
 302                 local p = nil
 303                 local target_name = nil
 304                 target_name = string.match(param, "^([^ ]+)$")
 305                 teleportee = core.get_player_by_name(name)
 306                 if target_name then
 307                         local target = core.get_player_by_name(target_name)
 308                         if target then
 309                                 p = target:getpos()
 310                         end
 311                 end
 312                 if teleportee and p then
 313                         p = find_free_position_near(p)
 314                         core.chat_send_player(name, "Teleporting to "..target_name.." at ("..p.x..", "..p.y..", "..p.z..")")
 315                         teleportee:setpos(p)
 316                         return
 317                 end
 318
 319                 if core.check_player_privs(name, {bring=true}) then
 320                         local teleportee = nil
 321                         local p = {}
 322                         local teleportee_name = nil
 323                         teleportee_name, p.x, p.y, p.z = string.match(param, "^([^ ]+) +([%d.-]+)[, ] *([%d.-]+)[, ] *([%d.-]+)$")
 324                         p.x = tonumber(p.x)
 325                         p.y = tonumber(p.y)
 326                         p.z = tonumber(p.z)
 327                         if teleportee_name then
 328                                 teleportee = core.get_player_by_name(teleportee_name)
 329                         end
 330                         if teleportee and p.x and p.y and p.z then
 331                                 core.chat_send_player(name, "Teleporting "..teleportee_name.." to ("..p.x..", "..p.y..", "..p.z..")")
 332                                 teleportee:setpos(p)
 333                                 return
 334                         end
 335
 336                         local teleportee = nil
 337                         local p = nil
 338                         local teleportee_name = nil
 339                         local target_name = nil
 340                         teleportee_name, target_name = string.match(param, "^([^ ]+) +([^ ]+)$")
 341                         if teleportee_name then
 342                                 teleportee = core.get_player_by_name(teleportee_name)
 343                         end
 344                         if target_name then
 345                                 local target = core.get_player_by_name(target_name)
 346                                 if target then
 347                                         p = target:getpos()
 348                                 end
 349                         end
 350                         if teleportee and p then
 351                                 p = find_free_position_near(p)
 352                                 core.chat_send_player(name, "Teleporting "..teleportee_name.." to "..target_name.." at ("..p.x..", "..p.y..", "..p.z..")")
 353                                 teleportee:setpos(p)
 354                                 return
 355                         end
 356                 end
 357
 358                 core.chat_send_player(name, "Invalid parameters (\""..param.."\") or player not found (see /help teleport)")
 359                 return
 360         end,
 361 })
 362
 363 core.register_chatcommand("set", {
 364         params = "[-n] <name> <value> | <name>",
 365         description = "set or read server configuration setting",
 366         privs = {server=true},
 367         func = function(name, param)
 368                 local arg, setname, setvalue = string.match(param, "(-[n]) ([^ ]+) (.+)")
 369                 if arg and arg == "-n" and setname and setvalue then
 370                         core.setting_set(setname, setvalue)
 371                         core.chat_send_player(name, setname.." = "..setvalue)
 372                         return
 373                 end
 374                 local setname, setvalue = string.match(param, "([^ ]+) (.+)")
 375                 if setname and setvalue then
 376                         if not core.setting_get(setname) then
 377                                 core.chat_send_player(name, "Failed. Use '/set -n <name> <value>' to create a new setting.")
 378                                 return
 379                         end
 380                         core.setting_set(setname, setvalue)
 381                         core.chat_send_player(name, setname.." = "..setvalue)
 382                         return
 383                 end
 384                 local setname = string.match(param, "([^ ]+)")
 385                 if setname then
 386                         local setvalue = core.setting_get(setname)
 387                         if not setvalue then
 388                                 setvalue = "<not set>"
 389                         end
 390                         core.chat_send_player(name, setname.." = "..setvalue)
 391                         return
 392                 end
 393                 core.chat_send_player(name, "Invalid parameters (see /help set)")
 394         end,
 395 })
 396
 397 core.register_chatcommand("mods", {
 398         params = "",
 399         description = "lists mods installed on the server",
 400         privs = {},
 401         func = function(name, param)
 402                 local response = ""
 403                 local modnames = core.get_modnames()
 404                 for i, mod in ipairs(modnames) do
 405                         response = response .. mod
 406                         -- Add space if not at the end
 407                         if i ~= #modnames then
 408                                 response = response .. " "
 409                         end
 410                 end
 411                 core.chat_send_player(name, response)
 412         end,
 413 })
 414
 415 local function handle_give_command(cmd, giver, receiver, stackstring)
 416         core.log("action", giver.." invoked "..cmd..', stackstring="'
 417                         ..stackstring..'"')
 418         core.log(cmd..' invoked, stackstring="'..stackstring..'"')
 419         local itemstack = ItemStack(stackstring)
 420         if itemstack:is_empty() then
 421                 core.chat_send_player(giver, 'error: cannot give an empty item')
 422                 return
 423         elseif not itemstack:is_known() then
 424                 core.chat_send_player(giver, 'error: cannot give an unknown item')
 425                 return
 426         end
 427         local receiverref = core.get_player_by_name(receiver)
 428         if receiverref == nil then
 429                 core.chat_send_player(giver, receiver..' is not a known player')
 430                 return
 431         end
 432         local leftover = receiverref:get_inventory():add_item("main", itemstack)
 433         if leftover:is_empty() then
 434                 partiality = ""
 435         elseif leftover:get_count() == itemstack:get_count() then
 436                 partiality = "could not be "
 437         else
 438                 partiality = "partially "
 439         end
 440         -- The actual item stack string may be different from what the "giver"
 441         -- entered (e.g. big numbers are always interpreted as 2^16-1).
 442         stackstring = itemstack:to_string()
 443         if giver == receiver then
 444                 core.chat_send_player(giver, '"'..stackstring
 445                         ..'" '..partiality..'added to inventory.');
 446         else
 447                 core.chat_send_player(giver, '"'..stackstring
 448                         ..'" '..partiality..'added to '..receiver..'\'s inventory.');
 449                 core.chat_send_player(receiver, '"'..stackstring
 450                         ..'" '..partiality..'added to inventory.');
 451         end
 452 end
 453
 454 core.register_chatcommand("give", {
 455         params = "<name> <itemstring>",
 456         description = "give item to player",
 457         privs = {give=true},
 458         func = function(name, param)
 459                 local toname, itemstring = string.match(param, "^([^ ]+) +(.+)$")
 460                 if not toname or not itemstring then
 461                         core.chat_send_player(name, "name and itemstring required")
 462                         return
 463                 end
 464                 handle_give_command("/give", name, toname, itemstring)
 465         end,
 466 })
 467 core.register_chatcommand("giveme", {
 468         params = "<itemstring>",
 469         description = "give item to yourself",
 470         privs = {give=true},
 471         func = function(name, param)
 472                 local itemstring = string.match(param, "(.+)$")
 473                 if not itemstring then
 474                         core.chat_send_player(name, "itemstring required")
 475                         return
 476                 end
 477                 handle_give_command("/giveme", name, name, itemstring)
 478         end,
 479 })
 480 core.register_chatcommand("spawnentity", {
 481         params = "<entityname>",
 482         description = "spawn entity at your position",
 483         privs = {give=true, interact=true},
 484         func = function(name, param)
 485                 local entityname = string.match(param, "(.+)$")
 486                 if not entityname then
 487                         core.chat_send_player(name, "entityname required")
 488                         return
 489                 end
 490                 core.log("action", '/spawnentity invoked, entityname="'..entityname..'"')
 491                 local player = core.get_player_by_name(name)
 492                 if player == nil then
 493                         core.log("error", "Unable to spawn entity, player is nil")
 494                         return true -- Handled chat message
 495                 end
 496                 local p = player:getpos()
 497                 p.y = p.y + 1
 498                 core.add_entity(p, entityname)
 499                 core.chat_send_player(name, '"'..entityname
 500                                 ..'" spawned.');
 501         end,
 502 })
 503 core.register_chatcommand("pulverize", {
 504         params = "",
 505         description = "delete item in hand",
 506         privs = {},
 507         func = function(name, param)
 508                 local player = core.get_player_by_name(name)
 509                 if player == nil then
 510                         core.log("error", "Unable to pulverize, player is nil")
 511                         return true -- Handled chat message
 512                 end
 513                 if player:get_wielded_item():is_empty() then
 514                         core.chat_send_player(name, 'Unable to pulverize, no item in hand.')
 515                 else
 516                         player:set_wielded_item(nil)
 517                         core.chat_send_player(name, 'An item was pulverized.')
 518                 end
 519         end,
 520 })
 521
 522 -- Key = player name
 523 core.rollback_punch_callbacks = {}
 524
 525 core.register_on_punchnode(function(pos, node, puncher)
 526         local name = puncher:get_player_name()
 527         if core.rollback_punch_callbacks[name] then
 528                 core.rollback_punch_callbacks[name](pos, node, puncher)
 529                 core.rollback_punch_callbacks[name] = nil
 530         end
 531 end)
 532
 533 core.register_chatcommand("rollback_check", {
 534         params = "[<range>] [<seconds>] [limit]",
 535         description = "check who has last touched a node or near it, "..
 536                         "max. <seconds> ago (default range=0, seconds=86400=24h, limit=5)",
 537         privs = {rollback=true},
 538         func = function(name, param)
 539                 local range, seconds, limit =
 540                         param:match("(%d+) *(%d*) *(%d*)")
 541                 range = tonumber(range) or 0
 542                 seconds = tonumber(seconds) or 86400
 543                 limit = tonumber(limit) or 5
 544                 if limit > 100 then
 545                         core.chat_send_player(name, "That limit is too high!")
 546                         return
 547                 end
 548                 core.chat_send_player(name, "Punch a node (range="..
 549                                 range..", seconds="..seconds.."s, limit="..limit..")")
 550
 551                 core.rollback_punch_callbacks[name] = function(pos, node, puncher)
 552                         local name = puncher:get_player_name()
 553                         core.chat_send_player(name, "Checking "..core.pos_to_string(pos).."...")
 554                         local actions = core.rollback_get_node_actions(pos, range, seconds, limit)
 555                         local num_actions = #actions
 556                         if num_actions == 0 then
 557                                 core.chat_send_player(name, "Nobody has touched the "..
 558                                                 "specified location in "..seconds.." seconds")
 559                                 return
 560                         end
 561                         local time = os.time()
 562                         for i = num_actions, 1, -1 do
 563                                 local action = actions[i]
 564                                 core.chat_send_player(name,
 565                                         ("%s %s %s -> %s %d seconds ago.")
 566                                                 :format(
 567                                                         core.pos_to_string(action.pos),
 568                                                         action.actor,
 569                                                         action.oldnode.name,
 570                                                         action.newnode.name,
 571                                                         time - action.time))
 572                         end
 573                 end
 574         end,
 575 })
 576
 577 core.register_chatcommand("rollback", {
 578         params = "<player name> [<seconds>] | :<actor> [<seconds>]",
 579         description = "revert actions of a player; default for <seconds> is 60",
 580         privs = {rollback=true},
 581         func = function(name, param)
 582                 local target_name, seconds = string.match(param, ":([^ ]+) *(%d*)")
 583                 if not target_name then
 584                         local player_name = nil
 585                         player_name, seconds = string.match(param, "([^ ]+) *(%d*)")
 586                         if not player_name then
 587                                 core.chat_send_player(name, "Invalid parameters. See /help rollback and /help rollback_check")
 588                                 return
 589                         end
 590                         target_name = "player:"..player_name
 591                 end
 592                 seconds = tonumber(seconds) or 60
 593                 core.chat_send_player(name, "Reverting actions of "..
 594                                 target_name.." since "..seconds.." seconds.")
 595                 local success, log = core.rollback_revert_actions_by(
 596                                 target_name, seconds)
 597                 if #log > 100 then
 598                         core.chat_send_player(name, "(log is too long to show)")
 599                 else
 600                         for _, line in pairs(log) do
 601                                 core.chat_send_player(name, line)
 602                         end
 603                 end
 604                 if success then
 605                         core.chat_send_player(name, "Reverting actions succeeded.")
 606                 else
 607                         core.chat_send_player(name, "Reverting actions FAILED.")
 608                 end
 609         end,
 610 })
 611
 612 core.register_chatcommand("status", {
 613         params = "",
 614         description = "print server status line",
 615         privs = {},
 616         func = function(name, param)
 617                 core.chat_send_player(name, core.get_server_status())
 618         end,
 619 })
 620
 621 core.register_chatcommand("time", {
 622         params = "<0...24000>",
 623         description = "set time of day",
 624         privs = {settime=true},
 625         func = function(name, param)
 626                 if param == "" then
 627                         core.chat_send_player(name, "Missing parameter")
 628                         return
 629                 end
 630                 local newtime = tonumber(param)
 631                 if newtime == nil then
 632                         core.chat_send_player(name, "Invalid time")
 633                 else
 634                         core.set_timeofday((newtime % 24000) / 24000)
 635                         core.chat_send_player(name, "Time of day changed.")
 636                         core.log("action", name .. " sets time " .. newtime)
 637                 end
 638         end,
 639 })
 640
 641 core.register_chatcommand("shutdown", {
 642         params = "",
 643         description = "shutdown server",
 644         privs = {server=true},
 645         func = function(name, param)
 646                 core.log("action", name .. " shuts down server")
 647                 core.request_shutdown()
 648                 core.chat_send_all("*** Server shutting down (operator request).")
 649         end,
 650 })
 651
 652 core.register_chatcommand("ban", {
 653         params = "<name>",
 654         description = "ban IP of player",
 655         privs = {ban=true},
 656         func = function(name, param)
 657                 if param == "" then
 658                         core.chat_send_player(name, "Ban list: " .. core.get_ban_list())
 659                         return
 660                 end
 661                 if not core.get_player_by_name(param) then
 662                         core.chat_send_player(name, "No such player")
 663                         return
 664                 end
 665                 if not core.ban_player(param) then
 666                         core.chat_send_player(name, "Failed to ban player")
 667                 else
 668                         local desc = core.get_ban_description(param)
 669                         core.chat_send_player(name, "Banned " .. desc .. ".")
 670                         core.log("action", name .. " bans " .. desc .. ".")
 671                 end
 672         end,
 673 })
 674
 675 core.register_chatcommand("unban", {
 676         params = "<name/ip>",
 677         description = "remove IP ban",
 678         privs = {ban=true},
 679         func = function(name, param)
 680                 if not core.unban_player_or_ip(param) then
 681                         core.chat_send_player(name, "Failed to unban player/IP")
 682                 else
 683                         core.chat_send_player(name, "Unbanned " .. param)
 684                         core.log("action", name .. " unbans " .. param)
 685                 end
 686         end,
 687 })
 688
 689 core.register_chatcommand("kick", {
 690         params = "<name> [reason]",
 691         description = "kick a player",
 692         privs = {kick=true},
 693         func = function(name, param)
 694                 local tokick, reason = string.match(param, "([^ ]+) (.+)")
 695                 if not tokick then
 696                         tokick = param
 697                 end
 698                 if not core.kick_player(tokick, reason) then
 699                         core.chat_send_player(name, "Failed to kick player " .. tokick)
 700                 else
 701                         core.chat_send_player(name, "kicked " .. tokick)
 702                         core.log("action", name .. " kicked " .. tokick)
 703                 end
 704         end,
 705 })
 706
 707 core.register_chatcommand("clearobjects", {
 708         params = "",
 709         description = "clear all objects in world",
 710         privs = {server=true},
 711         func = function(name, param)
 712                 core.log("action", name .. " clears all objects")
 713                 core.chat_send_all("Clearing all objects.  This may take long.  You may experience a timeout.  (by " .. name .. ")")
 714                 core.clear_objects()
 715                 core.log("action", "object clearing done")
 716                 core.chat_send_all("*** Cleared all objects.")
 717         end,
 718 })
 719
 720 core.register_chatcommand("msg", {
 721         params = "<name> <message>",
 722         description = "Send a private message",
 723         privs = {shout=true},
 724         func = function(name, param)
 725                 local found, _, sendto, message = param:find("^([^%s]+)%s(.+)$")
 726                 if found then
 727                         if core.get_player_by_name(sendto) then
 728                                 core.log("action", "PM from "..name.." to "..sendto..": "..message)
 729                                 core.chat_send_player(sendto, "PM from "..name..": "..message)
 730                                 core.chat_send_player(name, "Message sent")
 731                         else
 732                                 core.chat_send_player(name, "The player "..sendto.." is not online")
 733                         end
 734                 else
 735                         core.chat_send_player(name, "Invalid usage, see /help msg")
 736                 end
 737         end,
 738 })