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