builtin/chatcommands.lua

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