builtin/game/chatcommands.lua

   1 -- Minetest: builtin/game/chatcommands.lua
   2
   3 --
   4 -- Chat command handler
   5 --
   6
   7 core.chatcommands = core.registered_chatcommands -- BACKWARDS COMPATIBILITY
   8
   9 core.register_on_chat_message(function(name, message)
  10         if message:sub(1,1) ~= "/" then
  11                 return
  12         end
  13
  14         local cmd, param = string.match(message, "^/([^ ]+) *(.*)")
  15         if not cmd then
  16                 core.chat_send_player(name, "-!- Empty command")
  17                 return true
  18         end
  19
  20         param = param or ""
  21
  22         local cmd_def = core.registered_chatcommands[cmd]
  23         if not cmd_def then
  24                 core.chat_send_player(name, "-!- Invalid command: " .. cmd)
  25                 return true
  26         end
  27         local has_privs, missing_privs = core.check_player_privs(name, cmd_def.privs)
  28         if has_privs then
  29                 core.set_last_run_mod(cmd_def.mod_origin)
  30                 local success, message = cmd_def.func(name, param)
  31                 if message then
  32                         core.chat_send_player(name, message)
  33                 end
  34         else
  35                 core.chat_send_player(name, "You don't have permission"
  36                                 .. " to run this command (missing privileges: "
  37                                 .. table.concat(missing_privs, ", ") .. ")")
  38         end
  39         return true  -- Handled chat message
  40 end)
  41
  42 if core.setting_getbool("profiler.load") then
  43         -- Run after register_chatcommand and its register_on_chat_message
  44         -- Before any chattcommands that should be profiled
  45         profiler.init_chatcommand()
  46 end
  47
  48 -- Parses a "range" string in the format of "here (number)" or
  49 -- "(x1, y1, z1) (x2, y2, z2)", returning two position vectors
  50 local function parse_range_str(player_name, str)
  51         local p1, p2
  52         local args = str:split(" ")
  53
  54         if args[1] == "here" then
  55                 p1, p2 = core.get_player_radius_area(player_name, tonumber(args[2]))
  56                 if p1 == nil then
  57                         return false, "Unable to get player " .. player_name .. " position"
  58                 end
  59         else
  60                 p1, p2 = core.string_to_area(str)
  61                 if p1 == nil then
  62                         return false, "Incorrect area format. Expected: (x1,y1,z1) (x2,y2,z2)"
  63                 end
  64         end
  65
  66         return p1, p2
  67 end
  68
  69 --
  70 -- Chat commands
  71 --
  72 core.register_chatcommand("me", {
  73         params = "<action>",
  74         description = "Display chat action (e.g., '/me orders a pizza' displays"
  75                         .. " '<player name> orders a pizza')",
  76         privs = {shout=true},
  77         func = function(name, param)
  78                 core.chat_send_all("* " .. name .. " " .. param)
  79         end,
  80 })
  81
  82 core.register_chatcommand("admin", {
  83         description = "Show the name of the server owner",
  84         func = function(name)
  85                 local admin = minetest.setting_get("name")
  86                 if admin then
  87                         return true, "The administrator of this server is "..admin.."."
  88                 else
  89                         return false, "There's no administrator named in the config file."
  90                 end
  91         end,
  92 })
  93
  94 core.register_chatcommand("privs", {
  95         params = "<name>",
  96         description = "Print privileges of player",
  97         func = function(caller, param)
  98                 param = param:trim()
  99                 local name = (param ~= "" and param or caller)
 100                 return true, "Privileges of " .. name .. ": "
 101                         .. core.privs_to_string(
 102                                 core.get_player_privs(name), ' ')
 103         end,
 104 })
 105
 106 local function handle_grant_command(caller, grantname, grantprivstr)
 107         local caller_privs = minetest.get_player_privs(caller)
 108         if not (caller_privs.privs or caller_privs.basic_privs) then
 109                 return false, "Your privileges are insufficient."
 110         end
 111
 112         if not core.get_auth_handler().get_auth(grantname) then
 113                 return false, "Player " .. grantname .. " does not exist."
 114         end
 115         local grantprivs = core.string_to_privs(grantprivstr)
 116         if grantprivstr == "all" then
 117                 grantprivs = core.registered_privileges
 118         end
 119         local privs = core.get_player_privs(grantname)
 120         local privs_unknown = ""
 121         local basic_privs =
 122                 core.string_to_privs(core.setting_get("basic_privs") or "interact,shout")
 123         for priv, _ in pairs(grantprivs) do
 124                 if not basic_privs[priv] and not caller_privs.privs then
 125                         return false, "Your privileges are insufficient."
 126                 end
 127                 if not core.registered_privileges[priv] then
 128                         privs_unknown = privs_unknown .. "Unknown privilege: " .. priv .. "\n"
 129                 end
 130                 privs[priv] = true
 131         end
 132         if privs_unknown ~= "" then
 133                 return false, privs_unknown
 134         end
 135         core.set_player_privs(grantname, privs)
 136         core.log("action", caller..' granted ('..core.privs_to_string(grantprivs, ', ')..') privileges to '..grantname)
 137         if grantname ~= caller then
 138                 core.chat_send_player(grantname, caller
 139                                 .. " granted you privileges: "
 140                                 .. core.privs_to_string(grantprivs, ' '))
 141         end
 142         return true, "Privileges of " .. grantname .. ": "
 143                 .. core.privs_to_string(
 144                         core.get_player_privs(grantname), ' ')
 145 end
 146
 147 core.register_chatcommand("grant", {
 148         params = "<name> <privilege>|all",
 149         description = "Give privilege to player",
 150         func = function(name, param)
 151                 local grantname, grantprivstr = string.match(param, "([^ ]+) (.+)")
 152                 if not grantname or not grantprivstr then
 153                         return false, "Invalid parameters (see /help grant)"
 154                 end
 155                 return handle_grant_command(name, grantname, grantprivstr)
 156         end,
 157 })
 158
 159 core.register_chatcommand("grantme", {
 160         params = "<privilege>|all",
 161         description = "Grant privileges to yourself",
 162         func = function(name, param)
 163                 if param == "" then
 164                         return false, "Invalid parameters (see /help grantme)"
 165                 end
 166                 return handle_grant_command(name, name, param)
 167         end,
 168 })
 169
 170 core.register_chatcommand("revoke", {
 171         params = "<name> <privilege>|all",
 172         description = "Remove privilege from player",
 173         privs = {},
 174         func = function(name, param)
 175                 if not core.check_player_privs(name, {privs=true}) and
 176                                 not core.check_player_privs(name, {basic_privs=true}) then
 177                         return false, "Your privileges are insufficient."
 178                 end
 179                 local revoke_name, revoke_priv_str = string.match(param, "([^ ]+) (.+)")
 180                 if not revoke_name or not revoke_priv_str then
 181                         return false, "Invalid parameters (see /help revoke)"
 182                 elseif not core.get_auth_handler().get_auth(revoke_name) then
 183                         return false, "Player " .. revoke_name .. " does not exist."
 184                 end
 185                 local revoke_privs = core.string_to_privs(revoke_priv_str)
 186                 local privs = core.get_player_privs(revoke_name)
 187                 local basic_privs =
 188                         core.string_to_privs(core.setting_get("basic_privs") or "interact,shout")
 189                 for priv, _ in pairs(revoke_privs) do
 190                         if not basic_privs[priv] and
 191                                         not core.check_player_privs(name, {privs=true}) then
 192                                 return false, "Your privileges are insufficient."
 193                         end
 194                 end
 195                 if revoke_priv_str == "all" then
 196                         privs = {}
 197                 else
 198                         for priv, _ in pairs(revoke_privs) do
 199                                 privs[priv] = nil
 200                         end
 201                 end
 202                 core.set_player_privs(revoke_name, privs)
 203                 core.log("action", name..' revoked ('
 204                                 ..core.privs_to_string(revoke_privs, ', ')
 205                                 ..') privileges from '..revoke_name)
 206                 if revoke_name ~= name then
 207                         core.chat_send_player(revoke_name, name
 208                                         .. " revoked privileges from you: "
 209                                         .. core.privs_to_string(revoke_privs, ' '))
 210                 end
 211                 return true, "Privileges of " .. revoke_name .. ": "
 212                         .. core.privs_to_string(
 213                                 core.get_player_privs(revoke_name), ' ')
 214         end,
 215 })
 216
 217 core.register_chatcommand("setpassword", {
 218         params = "<name> <password>",
 219         description = "Set player's password",
 220         privs = {password=true},
 221         func = function(name, param)
 222                 local toname, raw_password = string.match(param, "^([^ ]+) +(.+)$")
 223                 if not toname then
 224                         toname = param:match("^([^ ]+) *$")
 225                         raw_password = nil
 226                 end
 227                 if not toname then
 228                         return false, "Name field required"
 229                 end
 230                 local act_str_past = "?"
 231                 local act_str_pres = "?"
 232                 if not raw_password then
 233                         core.set_player_password(toname, "")
 234                         act_str_past = "cleared"
 235                         act_str_pres = "clears"
 236                 else
 237                         core.set_player_password(toname,
 238                                         core.get_password_hash(toname,
 239                                                         raw_password))
 240                         act_str_past = "set"
 241                         act_str_pres = "sets"
 242                 end
 243                 if toname ~= name then
 244                         core.chat_send_player(toname, "Your password was "
 245                                         .. act_str_past .. " by " .. name)
 246                 end
 247
 248                 core.log("action", name .. " " .. act_str_pres
 249                 .. " password of " .. toname .. ".")
 250
 251                 return true, "Password of player \"" .. toname .. "\" " .. act_str_past
 252         end,
 253 })
 254
 255 core.register_chatcommand("clearpassword", {
 256         params = "<name>",
 257         description = "Set empty password",
 258         privs = {password=true},
 259         func = function(name, param)
 260                 local toname = param
 261                 if toname == "" then
 262                         return false, "Name field required"
 263                 end
 264                 core.set_player_password(toname, '')
 265
 266                 core.log("action", name .. " clears password of " .. toname .. ".")
 267
 268                 return true, "Password of player \"" .. toname .. "\" cleared"
 269         end,
 270 })
 271
 272 core.register_chatcommand("auth_reload", {
 273         params = "",
 274         description = "Reload authentication data",
 275         privs = {server=true},
 276         func = function(name, param)
 277                 local done = core.auth_reload()
 278                 return done, (done and "Done." or "Failed.")
 279         end,
 280 })
 281
 282 core.register_chatcommand("teleport", {
 283         params = "<X>,<Y>,<Z> | <to_name> | <name> <X>,<Y>,<Z> | <name> <to_name>",
 284         description = "Teleport to player or position",
 285         privs = {teleport=true},
 286         func = function(name, param)
 287                 -- Returns (pos, true) if found, otherwise (pos, false)
 288                 local function find_free_position_near(pos)
 289                         local tries = {
 290                                 {x=1,y=0,z=0},
 291                                 {x=-1,y=0,z=0},
 292                                 {x=0,y=0,z=1},
 293                                 {x=0,y=0,z=-1},
 294                         }
 295                         for _, d in ipairs(tries) do
 296                                 local p = {x = pos.x+d.x, y = pos.y+d.y, z = pos.z+d.z}
 297                                 local n = core.get_node_or_nil(p)
 298                                 if n and n.name then
 299                                         local def = core.registered_nodes[n.name]
 300                                         if def and not def.walkable then
 301                                                 return p, true
 302                                         end
 303                                 end
 304                         end
 305                         return pos, false
 306                 end
 307
 308                 local teleportee = nil
 309                 local p = {}
 310                 p.x, p.y, p.z = string.match(param, "^([%d.-]+)[, ] *([%d.-]+)[, ] *([%d.-]+)$")
 311                 p.x = tonumber(p.x)
 312                 p.y = tonumber(p.y)
 313                 p.z = tonumber(p.z)
 314                 if p.x and p.y and p.z then
 315                         local lm = 31000
 316                         if p.x < -lm or p.x > lm or p.y < -lm or p.y > lm or p.z < -lm or p.z > lm then
 317                                 return false, "Cannot teleport out of map bounds!"
 318                         end
 319                         teleportee = core.get_player_by_name(name)
 320                         if teleportee then
 321                                 teleportee:setpos(p)
 322                                 return true, "Teleporting to "..core.pos_to_string(p)
 323                         end
 324                 end
 325
 326                 local teleportee = nil
 327                 local p = nil
 328                 local target_name = nil
 329                 target_name = param:match("^([^ ]+)$")
 330                 teleportee = core.get_player_by_name(name)
 331                 if target_name then
 332                         local target = core.get_player_by_name(target_name)
 333                         if target then
 334                                 p = target:getpos()
 335                         end
 336                 end
 337                 if teleportee and p then
 338                         p = find_free_position_near(p)
 339                         teleportee:setpos(p)
 340                         return true, "Teleporting to " .. target_name
 341                                         .. " at "..core.pos_to_string(p)
 342                 end
 343
 344                 if not core.check_player_privs(name, {bring=true}) then
 345                         return false, "You don't have permission to teleport other players (missing bring privilege)"
 346                 end
 347
 348                 local teleportee = nil
 349                 local p = {}
 350                 local teleportee_name = nil
 351                 teleportee_name, p.x, p.y, p.z = param:match(
 352                                 "^([^ ]+) +([%d.-]+)[, ] *([%d.-]+)[, ] *([%d.-]+)$")
 353                 p.x, p.y, p.z = tonumber(p.x), tonumber(p.y), tonumber(p.z)
 354                 if teleportee_name then
 355                         teleportee = core.get_player_by_name(teleportee_name)
 356                 end
 357                 if teleportee and p.x and p.y and p.z then
 358                         teleportee:setpos(p)
 359                         return true, "Teleporting " .. teleportee_name
 360                                         .. " to " .. core.pos_to_string(p)
 361                 end
 362
 363                 local teleportee = nil
 364                 local p = nil
 365                 local teleportee_name = nil
 366                 local target_name = nil
 367                 teleportee_name, target_name = string.match(param, "^([^ ]+) +([^ ]+)$")
 368                 if teleportee_name then
 369                         teleportee = core.get_player_by_name(teleportee_name)
 370                 end
 371                 if target_name then
 372                         local target = core.get_player_by_name(target_name)
 373                         if target then
 374                                 p = target:getpos()
 375                         end
 376                 end
 377                 if teleportee and p then
 378                         p = find_free_position_near(p)
 379                         teleportee:setpos(p)
 380                         return true, "Teleporting " .. teleportee_name
 381                                         .. " to " .. target_name
 382                                         .. " at " .. core.pos_to_string(p)
 383                 end
 384
 385                 return false, 'Invalid parameters ("' .. param
 386                                 .. '") or player not found (see /help teleport)'
 387         end,
 388 })
 389
 390 core.register_chatcommand("set", {
 391         params = "[-n] <name> <value> | <name>",
 392         description = "Set or read server configuration setting",
 393         privs = {server=true},
 394         func = function(name, param)
 395                 local arg, setname, setvalue = string.match(param, "(-[n]) ([^ ]+) (.+)")
 396                 if arg and arg == "-n" and setname and setvalue then
 397                         core.setting_set(setname, setvalue)
 398                         return true, setname .. " = " .. setvalue
 399                 end
 400                 local setname, setvalue = string.match(param, "([^ ]+) (.+)")
 401                 if setname and setvalue then
 402                         if not core.setting_get(setname) then
 403                                 return false, "Failed. Use '/set -n <name> <value>' to create a new setting."
 404                         end
 405                         core.setting_set(setname, setvalue)
 406                         return true, setname .. " = " .. setvalue
 407                 end
 408                 local setname = string.match(param, "([^ ]+)")
 409                 if setname then
 410                         local setvalue = core.setting_get(setname)
 411                         if not setvalue then
 412                                 setvalue = "<not set>"
 413                         end
 414                         return true, setname .. " = " .. setvalue
 415                 end
 416                 return false, "Invalid parameters (see /help set)."
 417         end,
 418 })
 419
 420 local function emergeblocks_callback(pos, action, num_calls_remaining, ctx)
 421         if ctx.total_blocks == 0 then
 422                 ctx.total_blocks   = num_calls_remaining + 1
 423                 ctx.current_blocks = 0
 424         end
 425         ctx.current_blocks = ctx.current_blocks + 1
 426
 427         if ctx.current_blocks == ctx.total_blocks then
 428                 core.chat_send_player(ctx.requestor_name,
 429                         string.format("Finished emerging %d blocks in %.2fms.",
 430                         ctx.total_blocks, (os.clock() - ctx.start_time) * 1000))
 431         end
 432 end
 433
 434 local function emergeblocks_progress_update(ctx)
 435         if ctx.current_blocks ~= ctx.total_blocks then
 436                 core.chat_send_player(ctx.requestor_name,
 437                         string.format("emergeblocks update: %d/%d blocks emerged (%.1f%%)",
 438                         ctx.current_blocks, ctx.total_blocks,
 439                         (ctx.current_blocks / ctx.total_blocks) * 100))
 440
 441                 core.after(2, emergeblocks_progress_update, ctx)
 442         end
 443 end
 444
 445 core.register_chatcommand("emergeblocks", {
 446         params = "(here [radius]) | (<pos1> <pos2>)",
 447         description = "Load (or, if nonexistent, generate) map blocks "
 448                 .. "contained in area pos1 to pos2",
 449         privs = {server=true},
 450         func = function(name, param)
 451                 local p1, p2 = parse_range_str(name, param)
 452                 if p1 == false then
 453                         return false, p2
 454                 end
 455
 456                 local context = {
 457                         current_blocks = 0,
 458                         total_blocks   = 0,
 459                         start_time     = os.clock(),
 460                         requestor_name = name
 461                 }
 462
 463                 core.emerge_area(p1, p2, emergeblocks_callback, context)
 464                 core.after(2, emergeblocks_progress_update, context)
 465
 466                 return true, "Started emerge of area ranging from " ..
 467                         core.pos_to_string(p1, 1) .. " to " .. core.pos_to_string(p2, 1)
 468         end,
 469 })
 470
 471 core.register_chatcommand("deleteblocks", {
 472         params = "(here [radius]) | (<pos1> <pos2>)",
 473         description = "Delete map blocks contained in area pos1 to pos2",
 474         privs = {server=true},
 475         func = function(name, param)
 476                 local p1, p2 = parse_range_str(name, param)
 477                 if p1 == false then
 478                         return false, p2
 479                 end
 480
 481                 if core.delete_area(p1, p2) then
 482                         return true, "Successfully cleared area ranging from " ..
 483                                 core.pos_to_string(p1, 1) .. " to " .. core.pos_to_string(p2, 1)
 484                 else
 485                         return false, "Failed to clear one or more blocks in area"
 486                 end
 487         end,
 488 })
 489
 490 core.register_chatcommand("fixlight", {
 491         params = "(here [radius]) | (<pos1> <pos2>)",
 492         description = "Resets lighting in the area between pos1 and pos2",
 493         privs = {server = true},
 494         func = function(name, param)
 495                 local p1, p2 = parse_range_str(name, param)
 496                 if p1 == false then
 497                         return false, p2
 498                 end
 499
 500                 if core.fix_light(p1, p2) then
 501                         return true, "Successfully reset light in the area ranging from " ..
 502                                 core.pos_to_string(p1, 1) .. " to " .. core.pos_to_string(p2, 1)
 503                 else
 504                         return false, "Failed to load one or more blocks in area"
 505                 end
 506         end,
 507 })
 508
 509 core.register_chatcommand("mods", {
 510         params = "",
 511         description = "List mods installed on the server",
 512         privs = {},
 513         func = function(name, param)
 514                 return true, table.concat(core.get_modnames(), ", ")
 515         end,
 516 })
 517
 518 local function handle_give_command(cmd, giver, receiver, stackstring)
 519         core.log("action", giver .. " invoked " .. cmd
 520                         .. ', stackstring="' .. stackstring .. '"')
 521         local itemstack = ItemStack(stackstring)
 522         if itemstack:is_empty() then
 523                 return false, "Cannot give an empty item"
 524         elseif not itemstack:is_known() then
 525                 return false, "Cannot give an unknown item"
 526         end
 527         local receiverref = core.get_player_by_name(receiver)
 528         if receiverref == nil then
 529                 return false, receiver .. " is not a known player"
 530         end
 531         local leftover = receiverref:get_inventory():add_item("main", itemstack)
 532         local partiality
 533         if leftover:is_empty() then
 534                 partiality = ""
 535         elseif leftover:get_count() == itemstack:get_count() then
 536                 partiality = "could not be "
 537         else
 538                 partiality = "partially "
 539         end
 540         -- The actual item stack string may be different from what the "giver"
 541         -- entered (e.g. big numbers are always interpreted as 2^16-1).
 542         stackstring = itemstack:to_string()
 543         if giver == receiver then
 544                 return true, ("%q %sadded to inventory.")
 545                                 :format(stackstring, partiality)
 546         else
 547                 core.chat_send_player(receiver, ("%q %sadded to inventory.")
 548                                 :format(stackstring, partiality))
 549                 return true, ("%q %sadded to %s's inventory.")
 550                                 :format(stackstring, partiality, receiver)
 551         end
 552 end
 553
 554 core.register_chatcommand("give", {
 555         params = "<name> <ItemString>",
 556         description = "Give item to player",
 557         privs = {give=true},
 558         func = function(name, param)
 559                 local toname, itemstring = string.match(param, "^([^ ]+) +(.+)$")
 560                 if not toname or not itemstring then
 561                         return false, "Name and ItemString required"
 562                 end
 563                 return handle_give_command("/give", name, toname, itemstring)
 564         end,
 565 })
 566
 567 core.register_chatcommand("giveme", {
 568         params = "<ItemString>",
 569         description = "Give item to yourself",
 570         privs = {give=true},
 571         func = function(name, param)
 572                 local itemstring = string.match(param, "(.+)$")
 573                 if not itemstring then
 574                         return false, "ItemString required"
 575                 end
 576                 return handle_give_command("/giveme", name, name, itemstring)
 577         end,
 578 })
 579
 580 core.register_chatcommand("spawnentity", {
 581         params = "<EntityName> [<X>,<Y>,<Z>]",
 582         description = "Spawn entity at given (or your) position",
 583         privs = {give=true, interact=true},
 584         func = function(name, param)
 585                 local entityname, p = string.match(param, "^([^ ]+) *(.*)$")
 586                 if not entityname then
 587                         return false, "EntityName required"
 588                 end
 589                 core.log("action", ("%s invokes /spawnentity, entityname=%q")
 590                                 :format(name, entityname))
 591                 local player = core.get_player_by_name(name)
 592                 if player == nil then
 593                         core.log("error", "Unable to spawn entity, player is nil")
 594                         return false, "Unable to spawn entity, player is nil"
 595                 end
 596                 if p == "" then
 597                         p = player:getpos()
 598                 else
 599                         p = core.string_to_pos(p)
 600                         if p == nil then
 601                                 return false, "Invalid parameters ('" .. param .. "')"
 602                         end
 603                 end
 604                 p.y = p.y + 1
 605                 core.add_entity(p, entityname)
 606                 return true, ("%q spawned."):format(entityname)
 607         end,
 608 })
 609
 610 core.register_chatcommand("pulverize", {
 611         params = "",
 612         description = "Destroy item in hand",
 613         func = function(name, param)
 614                 local player = core.get_player_by_name(name)
 615                 if not player then
 616                         core.log("error", "Unable to pulverize, no player.")
 617                         return false, "Unable to pulverize, no player."
 618                 end
 619                 if player:get_wielded_item():is_empty() then
 620                         return false, "Unable to pulverize, no item in hand."
 621                 end
 622                 player:set_wielded_item(nil)
 623                 return true, "An item was pulverized."
 624         end,
 625 })
 626
 627 -- Key = player name
 628 core.rollback_punch_callbacks = {}
 629
 630 core.register_on_punchnode(function(pos, node, puncher)
 631         local name = puncher:get_player_name()
 632         if core.rollback_punch_callbacks[name] then
 633                 core.rollback_punch_callbacks[name](pos, node, puncher)
 634                 core.rollback_punch_callbacks[name] = nil
 635         end
 636 end)
 637
 638 core.register_chatcommand("rollback_check", {
 639         params = "[<range>] [<seconds>] [limit]",
 640         description = "Check who last touched a node or a node near it"
 641                         .. " within the time specified by <seconds>. Default: range = 0,"
 642                         .. " seconds = 86400 = 24h, limit = 5",
 643         privs = {rollback=true},
 644         func = function(name, param)
 645                 if not core.setting_getbool("enable_rollback_recording") then
 646                         return false, "Rollback functions are disabled."
 647                 end
 648                 local range, seconds, limit =
 649                         param:match("(%d+) *(%d*) *(%d*)")
 650                 range = tonumber(range) or 0
 651                 seconds = tonumber(seconds) or 86400
 652                 limit = tonumber(limit) or 5
 653                 if limit > 100 then
 654                         return false, "That limit is too high!"
 655                 end
 656
 657                 core.rollback_punch_callbacks[name] = function(pos, node, puncher)
 658                         local name = puncher:get_player_name()
 659                         core.chat_send_player(name, "Checking " .. core.pos_to_string(pos) .. "...")
 660                         local actions = core.rollback_get_node_actions(pos, range, seconds, limit)
 661                         if not actions then
 662                                 core.chat_send_player(name, "Rollback functions are disabled")
 663                                 return
 664                         end
 665                         local num_actions = #actions
 666                         if num_actions == 0 then
 667                                 core.chat_send_player(name, "Nobody has touched"
 668                                                 .. " the specified location in "
 669                                                 .. seconds .. " seconds")
 670                                 return
 671                         end
 672                         local time = os.time()
 673                         for i = num_actions, 1, -1 do
 674                                 local action = actions[i]
 675                                 core.chat_send_player(name,
 676                                         ("%s %s %s -> %s %d seconds ago.")
 677                                                 :format(
 678                                                         core.pos_to_string(action.pos),
 679                                                         action.actor,
 680                                                         action.oldnode.name,
 681                                                         action.newnode.name,
 682                                                         time - action.time))
 683                         end
 684                 end
 685
 686                 return true, "Punch a node (range=" .. range .. ", seconds="
 687                                 .. seconds .. "s, limit=" .. limit .. ")"
 688         end,
 689 })
 690
 691 core.register_chatcommand("rollback", {
 692         params = "<player name> [<seconds>] | :<actor> [<seconds>]",
 693         description = "Revert actions of a player. Default for <seconds> is 60",
 694         privs = {rollback=true},
 695         func = function(name, param)
 696                 if not core.setting_getbool("enable_rollback_recording") then
 697                         return false, "Rollback functions are disabled."
 698                 end
 699                 local target_name, seconds = string.match(param, ":([^ ]+) *(%d*)")
 700                 if not target_name then
 701                         local player_name = nil
 702                         player_name, seconds = string.match(param, "([^ ]+) *(%d*)")
 703                         if not player_name then
 704                                 return false, "Invalid parameters. See /help rollback"
 705                                                 .. " and /help rollback_check."
 706                         end
 707                         target_name = "player:"..player_name
 708                 end
 709                 seconds = tonumber(seconds) or 60
 710                 core.chat_send_player(name, "Reverting actions of "
 711                                 .. target_name .. " since "
 712                                 .. seconds .. " seconds.")
 713                 local success, log = core.rollback_revert_actions_by(
 714                                 target_name, seconds)
 715                 local response = ""
 716                 if #log > 100 then
 717                         response = "(log is too long to show)\n"
 718                 else
 719                         for _, line in pairs(log) do
 720                                 response = response .. line .. "\n"
 721                         end
 722                 end
 723                 response = response .. "Reverting actions "
 724                                 .. (success and "succeeded." or "FAILED.")
 725                 return success, response
 726         end,
 727 })
 728
 729 core.register_chatcommand("status", {
 730         description = "Print server status",
 731         func = function(name, param)
 732                 return true, core.get_server_status()
 733         end,
 734 })
 735
 736 core.register_chatcommand("time", {
 737         params = "<0..23>:<0..59> | <0..24000>",
 738         description = "Set time of day",
 739         privs = {},
 740         func = function(name, param)
 741                 if param == "" then
 742                         local current_time = math.floor(core.get_timeofday() * 1440)
 743                         local minutes = current_time % 60
 744                         local hour = (current_time - minutes) / 60
 745                         return true, ("Current time is %d:%02d"):format(hour, minutes)
 746                 end
 747                 local player_privs = core.get_player_privs(name)
 748                 if not player_privs.settime then
 749                         return false, "You don't have permission to run this command " ..
 750                                 "(missing privilege: settime)."
 751                 end
 752                 local hour, minute = param:match("^(%d+):(%d+)$")
 753                 if not hour then
 754                         local new_time = tonumber(param)
 755                         if not new_time then
 756                                 return false, "Invalid time."
 757                         end
 758                         -- Backward compatibility.
 759                         core.set_timeofday((new_time % 24000) / 24000)
 760                         core.log("action", name .. " sets time to " .. new_time)
 761                         return true, "Time of day changed."
 762                 end
 763                 hour = tonumber(hour)
 764                 minute = tonumber(minute)
 765                 if hour < 0 or hour > 23 then
 766                         return false, "Invalid hour (must be between 0 and 23 inclusive)."
 767                 elseif minute < 0 or minute > 59 then
 768                         return false, "Invalid minute (must be between 0 and 59 inclusive)."
 769                 end
 770                 core.set_timeofday((hour * 60 + minute) / 1440)
 771                 core.log("action", ("%s sets time to %d:%02d"):format(name, hour, minute))
 772                 return true, "Time of day changed."
 773         end,
 774 })
 775
 776 core.register_chatcommand("days", {
 777         description = "Display day count",
 778         func = function(name, param)
 779                 return true, "Current day is " .. core.get_day_count()
 780         end
 781 })
 782
 783 core.register_chatcommand("shutdown", {
 784         description = "Shutdown server",
 785         params = "[delay_in_seconds(0..inf) or -1 for cancel] [reconnect] [message]",
 786         privs = {server=true},
 787         func = function(name, param)
 788                 local delay, reconnect, message = param:match("([^ ][-]?[0-9]+)([^ ]+)(.*)")
 789                 message = message or ""
 790
 791                 if delay ~= "" then
 792                         delay = tonumber(param) or 0
 793                 else
 794                         delay = 0
 795                         core.log("action", name .. " shuts down server")
 796                         core.chat_send_all("*** Server shutting down (operator request).")
 797                 end
 798                 core.request_shutdown(message:trim(), core.is_yes(reconnect), delay)
 799         end,
 800 })
 801
 802 core.register_chatcommand("ban", {
 803         params = "<name>",
 804         description = "Ban IP of player",
 805         privs = {ban=true},
 806         func = function(name, param)
 807                 if param == "" then
 808                         return true, "Ban list: " .. core.get_ban_list()
 809                 end
 810                 if not core.get_player_by_name(param) then
 811                         return false, "No such player."
 812                 end
 813                 if not core.ban_player(param) then
 814                         return false, "Failed to ban player."
 815                 end
 816                 local desc = core.get_ban_description(param)
 817                 core.log("action", name .. " bans " .. desc .. ".")
 818                 return true, "Banned " .. desc .. "."
 819         end,
 820 })
 821
 822 core.register_chatcommand("unban", {
 823         params = "<name/ip>",
 824         description = "Remove IP ban",
 825         privs = {ban=true},
 826         func = function(name, param)
 827                 if not core.unban_player_or_ip(param) then
 828                         return false, "Failed to unban player/IP."
 829                 end
 830                 core.log("action", name .. " unbans " .. param)
 831                 return true, "Unbanned " .. param
 832         end,
 833 })
 834
 835 core.register_chatcommand("kick", {
 836         params = "<name> [reason]",
 837         description = "Kick a player",
 838         privs = {kick=true},
 839         func = function(name, param)
 840                 local tokick, reason = param:match("([^ ]+) (.+)")
 841                 tokick = tokick or param
 842                 if not core.kick_player(tokick, reason) then
 843                         return false, "Failed to kick player " .. tokick
 844                 end
 845                 local log_reason = ""
 846                 if reason then
 847                         log_reason = " with reason \"" .. reason .. "\""
 848                 end
 849                 core.log("action", name .. " kicks " .. tokick .. log_reason)
 850                 return true, "Kicked " .. tokick
 851         end,
 852 })
 853
 854 core.register_chatcommand("clearobjects", {
 855         params = "[full|quick]",
 856         description = "Clear all objects in world",
 857         privs = {server=true},
 858         func = function(name, param)
 859                 local options = {}
 860                 if param == "" or param == "full" then
 861                         options.mode = "full"
 862                 elseif param == "quick" then
 863                         options.mode = "quick"
 864                 else
 865                         return false, "Invalid usage, see /help clearobjects."
 866                 end
 867
 868                 core.log("action", name .. " clears all objects ("
 869                                 .. options.mode .. " mode).")
 870                 core.chat_send_all("Clearing all objects.  This may take long."
 871                                 .. "  You may experience a timeout.  (by "
 872                                 .. name .. ")")
 873                 core.clear_objects(options)
 874                 core.log("action", "Object clearing done.")
 875                 core.chat_send_all("*** Cleared all objects.")
 876         end,
 877 })
 878
 879 core.register_chatcommand("msg", {
 880         params = "<name> <message>",
 881         description = "Send a private message",
 882         privs = {shout=true},
 883         func = function(name, param)
 884                 local sendto, message = param:match("^(%S+)%s(.+)$")
 885                 if not sendto then
 886                         return false, "Invalid usage, see /help msg."
 887                 end
 888                 if not core.get_player_by_name(sendto) then
 889                         return false, "The player " .. sendto
 890                                         .. " is not online."
 891                 end
 892                 core.log("action", "PM from " .. name .. " to " .. sendto
 893                                 .. ": " .. message)
 894                 core.chat_send_player(sendto, "PM from " .. name .. ": "
 895                                 .. message)
 896                 return true, "Message sent."
 897         end,
 898 })
 899
 900 core.register_chatcommand("last-login", {
 901         params = "[name]",
 902         description = "Get the last login time of a player",
 903         func = function(name, param)
 904                 if param == "" then
 905                         param = name
 906                 end
 907                 local pauth = core.get_auth_handler().get_auth(param)
 908                 if pauth and pauth.last_login then
 909                         -- Time in UTC, ISO 8601 format
 910                         return true, "Last login time was " ..
 911                                 os.date("!%Y-%m-%dT%H:%M:%SZ", pauth.last_login)
 912                 end
 913                 return false, "Last login time is unknown"
 914         end,
 915 })