modules/luci-base/root/usr/libexec/rpcd/luci

   1 #!/usr/bin/env lua
   2
   3 local json = require "luci.jsonc"
   4 local fs   = require "nixio.fs"
   5
   6 local function readfile(path)
   7         local s = fs.readfile(path)
   8         return s and (s:gsub("^%s+", ""):gsub("%s+$", ""))
   9 end
  10
  11 local methods = {
  12         getInitList = {
  13                 args = { name = "name" },
  14                 call = function(args)
  15                         local sys = require "luci.sys"
  16                         local _, name, scripts = nil, nil, {}
  17                         for _, name in ipairs(args.name and { args.name } or sys.init.names()) do
  18                                 local index = sys.init.index(name)
  19                                 if index then
  20                                         scripts[name] = { index = index, enabled = sys.init.enabled(name) }
  21                                 else
  22                                         return { error = "No such init script" }
  23                                 end
  24                         end
  25                         return scripts
  26                 end
  27         },
  28
  29         setInitAction = {
  30                 args = { name = "name", action = "action" },
  31                 call = function(args)
  32                         local sys = require "luci.sys"
  33                         if type(sys.init[args.action]) ~= "function" then
  34                                 return { error = "Invalid action" }
  35                         end
  36                         return { result = sys.init[args.action](args.name) }
  37                 end
  38         },
  39
  40         getLocaltime = {
  41                 call = function(args)
  42                         return { result = os.time() }
  43                 end
  44         },
  45
  46         setLocaltime = {
  47                 args = { localtime = 0 },
  48                 call = function(args)
  49                         local sys = require "luci.sys"
  50                         local date = os.date("*t", args.localtime)
  51                         if date then
  52                                 sys.call("date -s '%04d-%02d-%02d %02d:%02d:%02d' >/dev/null" %{ date.year, date.month, date.day, date.hour, date.min, date.sec })
  53                                 sys.call("/etc/init.d/sysfixtime restart >/dev/null")
  54                         end
  55                         return { result = args.localtime }
  56                 end
  57         },
  58
  59         getTimezones = {
  60                 call = function(args)
  61                         local util  = require "luci.util"
  62                         local zones = require "luci.sys.zoneinfo"
  63
  64                         local tz = readfile("/etc/TZ")
  65                         local res = util.ubus("uci", "get", {
  66                                 config = "system",
  67                                 section = "@system[0]",
  68                                 option = "zonename"
  69                         })
  70
  71                         local result = {}
  72                         local _, zone
  73                         for _, zone in ipairs(zones.TZ) do
  74                                 result[zone[1]] = {
  75                                         tzstring = zone[2],
  76                                         active = (res and res.value == zone[1]) and true or nil
  77                                 }
  78                         end
  79                         return result
  80                 end
  81         },
  82
  83         getLEDs = {
  84                 call = function()
  85                         local iter   = fs.dir("/sys/class/leds")
  86                         local result = { }
  87
  88                         if iter then
  89                                 local led
  90                                 for led in iter do
  91                                         local m, s
  92
  93                                         result[led] = { triggers = {} }
  94
  95                                         s = readfile("/sys/class/leds/"..led.."/trigger")
  96                                         for s in (s or ""):gmatch("%S+") do
  97                                                 m = s:match("^%[(.+)%]$")
  98                                                 result[led].triggers[#result[led].triggers+1] = m or s
  99                                                 result[led].active_trigger = m or result[led].active_trigger
 100                                         end
 101
 102                                         s = readfile("/sys/class/leds/"..led.."/brightness")
 103                                         if s then
 104                                                 result[led].brightness = tonumber(s)
 105                                         end
 106
 107                                         s = readfile("/sys/class/leds/"..led.."/max_brightness")
 108                                         if s then
 109                                                 result[led].max_brightness = tonumber(s)
 110                                         end
 111                                 end
 112                         end
 113
 114                         return result
 115                 end
 116         },
 117
 118         getUSBDevices = {
 119                 call = function()
 120                         local fs     = require "nixio.fs"
 121                         local iter   = fs.glob("/sys/bus/usb/devices/[0-9]*/manufacturer")
 122                         local result = { }
 123
 124                         if iter then
 125                                 result.devices = {}
 126
 127                                 local p
 128                                 for p in iter do
 129                                         local id = p:match("/([^/]+)/manufacturer$")
 130
 131                                         result.devices[#result.devices+1] = {
 132                                                 id      = id,
 133                                                 vid     = readfile("/sys/bus/usb/devices/"..id.."/idVendor"),
 134                                                 pid     = readfile("/sys/bus/usb/devices/"..id.."/idProduct"),
 135                                                 vendor  = readfile("/sys/bus/usb/devices/"..id.."/manufacturer"),
 136                                                 product = readfile("/sys/bus/usb/devices/"..id.."/product"),
 137                                                 speed   = tonumber((readfile("/sys/bus/usb/devices/"..id.."/product")))
 138                                         }
 139                                 end
 140                         end
 141
 142                         iter = fs.glob("/sys/bus/usb/devices/*/*-port[0-9]*")
 143
 144                         if iter then
 145                                 result.ports = {}
 146
 147                                 local p
 148                                 for p in iter do
 149                                         local port = p:match("([^/]+)$")
 150                                         local link = fs.readlink(p.."/device")
 151
 152                                         result.ports[#result.ports+1] = {
 153                                                 port   = port,
 154                                                 device = link and fs.basename(link)
 155                                         }
 156                                 end
 157                         end
 158
 159                         return result
 160                 end
 161         },
 162
 163         getIfaddrs = {
 164                 call = function()
 165                         return { result = nixio.getifaddrs() }
 166                 end
 167         },
 168
 169         getHostHints = {
 170                 call = function()
 171                         local sys = require "luci.sys"
 172                         return sys.net.host_hints()
 173                 end
 174         },
 175
 176         getDUIDHints = {
 177                 call = function()
 178                         local fp = io.open('/var/hosts/odhcpd')
 179                         local result = { }
 180                         if fp then
 181                                 for line in fp:lines() do
 182                                         local dev, duid, name = string.match(line, '# (%S+)%s+(%S+)%s+%d+%s+(%S+)')
 183                                         if dev and duid and name then
 184                                                 result[duid] = {
 185                                                         name = (name ~= "-") and name or nil,
 186                                                         device = dev
 187                                                 }
 188                                         end
 189                                 end
 190                                 fp:close()
 191                         end
 192                         return result
 193                 end
 194         },
 195
 196         getDHCPLeases = {
 197                 args = { family = 0 },
 198                 call = function(args)
 199                         local s = require "luci.tools.status"
 200
 201                         if args.family == 4 then
 202                                 return { dhcp_leases = s.dhcp_leases() }
 203                         elseif args.family == 6 then
 204                                 return { dhcp6_leases = s.dhcp6_leases() }
 205                         else
 206                                 return {
 207                                         dhcp_leases = s.dhcp_leases(),
 208                                         dhcp6_leases = s.dhcp6_leases()
 209                                 }
 210                         end
 211                 end
 212         },
 213
 214         getNetworkDevices = {
 215                 call = function(args)
 216                         local dir = fs.dir("/sys/class/net")
 217                         local result = { }
 218                         if dir then
 219                                 local dev
 220                                 for dev in dir do
 221                                         if not result[dev] then
 222                                                 result[dev] = { name = dev }
 223                                         end
 224
 225                                         if fs.access("/sys/class/net/"..dev.."/master") then
 226                                                 local brname = fs.basename(fs.readlink("/sys/class/net/"..dev.."/master"))
 227                                                 if not result[brname] then
 228                                                         result[brname] = { name = brname }
 229                                                 end
 230
 231                                                 if not result[brname].ports then
 232                                                         result[brname].ports = { }
 233                                                 end
 234
 235                                                 result[brname].ports[#result[brname].ports+1] = dev
 236                                         elseif fs.access("/sys/class/net/"..dev.."/bridge") then
 237                                                 if not result[dev].ports then
 238                                                         result[dev].ports = { }
 239                                                 end
 240
 241                                                 result[dev].id = readfile("/sys/class/net/"..dev.."/bridge/bridge_id")
 242                                                 result[dev].stp = (readfile("/sys/class/net/"..dev.."/bridge/stp_state") ~= "0")
 243                                                 result[dev].bridge = true
 244                                         end
 245
 246                                         local opr = readfile("/sys/class/net/"..dev.."/operstate")
 247
 248                                         result[dev].up = (opr == "up" or opr == "unknown")
 249                                         result[dev].type = tonumber(readfile("/sys/class/net/"..dev.."/type"))
 250                                         result[dev].name = dev
 251
 252                                         local mtu = tonumber(readfile("/sys/class/net/"..dev.."/mtu"))
 253                                         if mtu and mtu > 0 then
 254                                                 result[dev].mtu = mtu
 255                                         end
 256
 257                                         local qlen = tonumber(readfile("/sys/class/net/"..dev.."/tx_queue_len"))
 258                                         if qlen and qlen > 0 then
 259                                                 result[dev].qlen = qlen
 260                                         end
 261
 262                                         local master = fs.readlink("/sys/class/net/"..dev.."/master")
 263                                         if master then
 264                                                 result[dev].master = fs.basename(master)
 265                                         end
 266
 267                                         local mac = readfile("/sys/class/net/"..dev.."/address")
 268                                         if mac and #mac == 17 then
 269                                                 result[dev].mac = mac
 270                                         end
 271                                 end
 272                         end
 273                         return result
 274                 end
 275         },
 276
 277         getWirelessDevices = {
 278                 call = function(args)
 279                         local ubus = require "ubus".connect()
 280                         if not ubus then
 281                                 return { error = "Unable to establish ubus connection" }
 282                         end
 283
 284                         local status = ubus:call("network.wireless", "status", {})
 285                         if type(status) == "table" then
 286                                 local radioname, radiodata
 287                                 for radioname, radiodata in pairs(status) do
 288                                         if type(radiodata) == "table" then
 289                                                 radiodata.iwinfo = ubus:call("iwinfo", "info", { device = radioname }) or {}
 290                                                 radiodata.iwinfo.bitrate     = nil
 291                                                 radiodata.iwinfo.bssid       = nil
 292                                                 radiodata.iwinfo.encryption  = nil
 293                                                 radiodata.iwinfo.mode        = nil
 294                                                 radiodata.iwinfo.quality     = nil
 295                                                 radiodata.iwinfo.quality_max = nil
 296                                                 radiodata.iwinfo.ssid        = nil
 297
 298                                                 local iwdata = nil
 299
 300                                                 if type(radiodata.interfaces) == "table" then
 301                                                         local _, interfacedata
 302                                                         for _, interfacedata in ipairs(radiodata.interfaces) do
 303                                                                 if type(interfacedata) == "table" and
 304                                                                    type(interfacedata.ifname) == "string"
 305                                                                 then
 306                                                                         local iwinfo = ubus:call("iwinfo", "info", { device = interfacedata.ifname })
 307
 308                                                                         iwdata = iwdata or iwinfo
 309                                                                         interfacedata.iwinfo = iwinfo or {}
 310                                                                 end
 311                                                         end
 312                                                 end
 313
 314                                                 radiodata.iwinfo = {}
 315
 316                                                 local _, k, v
 317                                                 for k, v in pairs(iwdata or ubus:call("iwinfo", "info", { device = radioname }) or {}) do
 318                                                         if k ~= "bitrate" and k ~= "bssid" and k ~= "encryption" and
 319                                                            k ~= "mode" and k ~= "quality" and k ~= "quality_max" and
 320                                                            k ~= "ssid"
 321                                                         then
 322                                                                 if type(v) == "table" then
 323                                                                         radiodata.iwinfo[k] = json.parse(json.stringify(v))
 324                                                                 else
 325                                                                         radiodata.iwinfo[k] = v
 326                                                                 end
 327                                                         end
 328                                                 end
 329                                         end
 330                                 end
 331                         end
 332
 333                         return status
 334                 end
 335         },
 336
 337         getBoardJSON = {
 338                 call = function(args)
 339                         local jsc = require "luci.jsonc"
 340                         return jsc.parse(fs.readfile("/etc/board.json") or "")
 341                 end
 342         },
 343
 344         getConntrackHelpers = {
 345                 call = function()
 346                         local ok, fd = pcall(io.open, "/usr/share/fw3/helpers.conf", "r")
 347                         local rv = {}
 348
 349                         if ok then
 350                                 local entry
 351
 352                                 while true do
 353                                         local line = fd:read("*l")
 354                                         if not line then
 355                                                 break
 356                                         end
 357
 358                                         if line:match("^%s*config%s") then
 359                                                 if entry then
 360                                                         rv[#rv+1] = entry
 361                                                 end
 362                                                 entry = {}
 363                                         else
 364                                                 local opt, val = line:match("^%s*option%s+(%S+)%s+(%S.*)$")
 365                                                 if opt and val then
 366                                                         opt = opt:gsub("^'(.+)'$", "%1"):gsub('^"(.+)"$', "%1")
 367                                                         val = val:gsub("^'(.+)'$", "%1"):gsub('^"(.+)"$', "%1")
 368                                                         entry[opt] = val
 369                                                 end
 370                                         end
 371                                 end
 372
 373                                 if entry then
 374                                         rv[#rv+1] = entry
 375                                 end
 376
 377                                 fd:close()
 378                         end
 379
 380                         return { result = rv }
 381                 end
 382         },
 383
 384         getFeatures = {
 385                 call = function()
 386                         local fs = require "nixio.fs"
 387                         local rv = {}
 388                         local ok, fd
 389
 390                         rv.firewall      = fs.access("/sbin/fw3")
 391                         rv.opkg          = fs.access("/bin/opkg")
 392                         rv.offloading    = fs.access("/sys/module/xt_FLOWOFFLOAD/refcnt")
 393                         rv.br2684ctl     = fs.access("/usr/sbin/br2684ctl")
 394                         rv.swconfig      = fs.access("/sbin/swconfig")
 395                         rv.odhcpd        = fs.access("/usr/sbin/odhcpd")
 396                         rv.zram          = fs.access("/sys/class/zram-control")
 397                         rv.sysntpd       = fs.readlink("/usr/sbin/ntpd") and true
 398                         rv.ipv6          = fs.access("/proc/net/ipv6_route")
 399                         rv.dropbear      = fs.access("/usr/sbin/dropbear")
 400
 401                         local wifi_features = { "eap", "11n", "11ac", "11r", "11w", "acs", "sae", "owe", "suiteb192" }
 402
 403                         if fs.access("/usr/sbin/hostapd") then
 404                                 rv.hostapd = { cli = fs.access("/usr/sbin/hostapd_cli") }
 405
 406                                 local _, feature
 407                                 for _, feature in ipairs(wifi_features) do
 408                                         rv.hostapd[feature] =
 409                                                 (os.execute(string.format("/usr/sbin/hostapd -v%s >/dev/null 2>/dev/null", feature)) == 0)
 410                                 end
 411                         end
 412
 413                         if fs.access("/usr/sbin/wpa_supplicant") then
 414                                 rv.wpasupplicant = { cli = fs.access("/usr/sbin/wpa_cli") }
 415
 416                                 local _, feature
 417                                 for _, feature in ipairs(wifi_features) do
 418                                         rv.wpasupplicant[feature] =
 419                                                 (os.execute(string.format("/usr/sbin/wpa_supplicant -v%s >/dev/null 2>/dev/null", feature)) == 0)
 420                                 end
 421                         end
 422
 423                         ok, fd = pcall(io.popen, "dnsmasq --version 2>/dev/null")
 424                         if ok then
 425                                 rv.dnsmasq = {}
 426
 427                                 while true do
 428                                         local line = fd:read("*l")
 429                                         if not line then
 430                                                 break
 431                                         end
 432
 433                                         local opts = line:match("^Compile time options: (.+)$")
 434                                         if opts then
 435                                                 local opt
 436                                                 for opt in opts:gmatch("%S+") do
 437                                                         local no = opt:match("^no%-(%S+)$")
 438                                                         rv.dnsmasq[string.lower(no or opt)] = not no
 439                                                 end
 440                                                 break
 441                                         end
 442                                 end
 443
 444                                 fd:close()
 445                         end
 446
 447                         ok, fd = pcall(io.popen, "ipset --help 2>/dev/null")
 448                         if ok then
 449                                 rv.ipset = {}
 450
 451                                 local sets = false
 452
 453                                 while true do
 454                                         local line = fd:read("*l")
 455                                         if not line then
 456                                                 break
 457                                         elseif line:match("^Supported set types:") then
 458                                                 sets = true
 459                                         elseif sets then
 460                                                 local set, ver = line:match("^%s+(%S+)%s+(%d+)")
 461                                                 if set and not rv.ipset[set] then
 462                                                         rv.ipset[set] = tonumber(ver)
 463                                                 end
 464                                         end
 465                                 end
 466
 467                                 fd:close()
 468                         end
 469
 470                         return rv
 471                 end
 472         },
 473
 474         getSwconfigFeatures = {
 475                 args = { switch = "switch0" },
 476                 call = function(args)
 477                         local util = require "luci.util"
 478
 479                         -- Parse some common switch properties from swconfig help output.
 480                         local swc, err = io.popen("swconfig dev %s help 2>/dev/null" % util.shellquote(args.switch))
 481                         if swc then
 482                                 local is_port_attr = false
 483                                 local is_vlan_attr = false
 484                                 local rv = {}
 485
 486                                 while true do
 487                                         local line = swc:read("*l")
 488                                         if not line then break end
 489
 490                                         if line:match("^%s+%-%-vlan") then
 491                                                 is_vlan_attr = true
 492
 493                                         elseif line:match("^%s+%-%-port") then
 494                                                 is_vlan_attr = false
 495                                                 is_port_attr = true
 496
 497                                         elseif line:match("cpu @") then
 498                                                 rv.switch_title = line:match("^switch%d: %w+%((.-)%)")
 499                                                 rv.num_vlans    = tonumber(line:match("vlans: (%d+)")) or 16
 500                                                 rv.min_vid      = 1
 501
 502                                         elseif line:match(": pvid") or line:match(": tag") or line:match(": vid") then
 503                                                 if is_vlan_attr then rv.vid_option = line:match(": (%w+)") end
 504
 505                                         elseif line:match(": enable_vlan4k") then
 506                                                 rv.vlan4k_option = "enable_vlan4k"
 507
 508                                         elseif line:match(": enable_vlan") then
 509                                                 rv.vlan_option = "enable_vlan"
 510
 511                                         elseif line:match(": enable_learning") then
 512                                                 rv.learning_option = "enable_learning"
 513
 514                                         elseif line:match(": enable_mirror_rx") then
 515                                                 rv.mirror_option = "enable_mirror_rx"
 516
 517                                         elseif line:match(": max_length") then
 518                                                 rv.jumbo_option = "max_length"
 519                                         end
 520                                 end
 521
 522                                 swc:close()
 523
 524                                 if not next(rv) then
 525                                         return { error = "No such switch" }
 526                                 end
 527
 528                                 return rv
 529                         else
 530                                 return { error = err }
 531                         end
 532                 end
 533         },
 534
 535         getSwconfigPortState = {
 536                 args = { switch = "switch0" },
 537                 call = function(args)
 538                         local util = require "luci.util"
 539
 540                         local swc, err = io.popen("swconfig dev %s show 2>/dev/null" % util.shellquote(args.switch))
 541                         if swc then
 542                                 local ports = { }
 543
 544                                 while true do
 545                                         local line = swc:read("*l")
 546                                         if not line then break end
 547
 548                                         local port, up = line:match("port:(%d+) link:(%w+)")
 549                                         if port then
 550                                                 local speed  = line:match(" speed:(%d+)")
 551                                                 local duplex = line:match(" (%w+)-duplex")
 552                                                 local txflow = line:match(" (txflow)")
 553                                                 local rxflow = line:match(" (rxflow)")
 554                                                 local auto   = line:match(" (auto)")
 555
 556                                                 ports[#ports+1] = {
 557                                                         port   = tonumber(port) or 0,
 558                                                         speed  = tonumber(speed) or 0,
 559                                                         link   = (up == "up"),
 560                                                         duplex = (duplex == "full"),
 561                                                         rxflow = (not not rxflow),
 562                                                         txflow = (not not txflow),
 563                                                         auto   = (not not auto)
 564                                                 }
 565                                         end
 566                                 end
 567
 568                                 swc:close()
 569
 570                                 if not next(ports) then
 571                                         return { error = "No such switch" }
 572                                 end
 573
 574                                 return { result = ports }
 575                         else
 576                                 return { error = err }
 577                         end
 578                 end
 579         },
 580
 581         setPassword = {
 582                 args = { username = "root", password = "password" },
 583                 call = function(args)
 584                         local util = require "luci.util"
 585                         return {
 586                                 result = (os.execute("(echo %s; sleep 1; echo %s) | passwd %s >/dev/null 2>&1" %{
 587                                         luci.util.shellquote(args.password),
 588                                         luci.util.shellquote(args.password),
 589                                         luci.util.shellquote(args.username)
 590                                 }) == 0)
 591                         }
 592                 end
 593         },
 594
 595         getBlockDevices = {
 596                 call = function()
 597                         local fs = require "nixio.fs"
 598
 599                         local block = io.popen("/sbin/block info", "r")
 600                         if block then
 601                                 local rv = {}
 602
 603                                 while true do
 604                                         local ln = block:read("*l")
 605                                         if not ln then
 606                                                 break
 607                                         end
 608
 609                                         local dev = ln:match("^/dev/(.-):")
 610                                         if dev then
 611                                                 local s = tonumber((fs.readfile("/sys/class/block/" .. dev .."/size")))
 612                                                 local e = {
 613                                                         dev = "/dev/" .. dev,
 614                                                         size = s and s * 512
 615                                                 }
 616
 617                                                 local key, val = { }
 618                                                 for key, val in ln:gmatch([[(%w+)="(.-)"]]) do
 619                                                         e[key:lower()] = val
 620                                                 end
 621
 622                                                 rv[dev] = e
 623                                         end
 624                                 end
 625
 626                                 block:close()
 627
 628                                 return rv
 629                         else
 630                                 return { error = "Unable to execute block utility" }
 631                         end
 632                 end
 633         },
 634
 635         setBlockDetect = {
 636                 call = function()
 637                         return { result = (os.execute("/sbin/block detect > /etc/config/fstab") == 0) }
 638                 end
 639         },
 640
 641         getMountPoints = {
 642                 call = function()
 643                         local fs = require "nixio.fs"
 644
 645                         local fd, err = io.open("/proc/mounts", "r")
 646                         if fd then
 647                                 local rv = {}
 648
 649                                 while true do
 650                                         local ln = fd:read("*l")
 651                                         if not ln then
 652                                                 break
 653                                         end
 654
 655                                         local device, mount, fstype, options, freq, pass = ln:match("^(%S*) (%S*) (%S*) (%S*) (%d+) (%d+)$")
 656                                         if device and mount then
 657                                                 device = device:gsub("\\(%d+)", function(n) return string.char(tonumber(n, 8)) end)
 658                                                 mount = mount:gsub("\\(%d+)", function(n) return string.char(tonumber(n, 8)) end)
 659
 660                                                 local stat = fs.statvfs(mount)
 661                                                 if stat and stat.blocks > 0 then
 662                                                         rv[#rv+1] = {
 663                                                                 device = device,
 664                                                                 mount  = mount,
 665                                                                 size   = stat.bsize * stat.blocks,
 666                                                                 avail  = stat.bsize * stat.bavail,
 667                                                                 free   = stat.bsize * stat.bfree
 668                                                         }
 669                                                 end
 670                                         end
 671                                 end
 672
 673                                 fd:close()
 674
 675                                 return { result = rv }
 676                         else
 677                                 return { error = err }
 678                         end
 679                 end
 680         },
 681
 682         setUmount = {
 683                 args = { path = "/mnt" },
 684                 call = function(args)
 685                         local util = require "luci.util"
 686                         return { result = (os.execute(string.format("/bin/umount %s", util.shellquote(args.path))) == 0) }
 687                 end
 688         }
 689 }
 690
 691 local function parseInput()
 692         local parse = json.new()
 693         local done, err
 694
 695         while true do
 696                 local chunk = io.read(4096)
 697                 if not chunk then
 698                         break
 699                 elseif not done and not err then
 700                         done, err = parse:parse(chunk)
 701                 end
 702         end
 703
 704         if not done then
 705                 print(json.stringify({ error = err or "Incomplete input" }))
 706                 os.exit(1)
 707         end
 708
 709         return parse:get()
 710 end
 711
 712 local function validateArgs(func, uargs)
 713         local method = methods[func]
 714         if not method then
 715                 print(json.stringify({ error = "Method not found" }))
 716                 os.exit(1)
 717         end
 718
 719         if type(uargs) ~= "table" then
 720                 print(json.stringify({ error = "Invalid arguments" }))
 721                 os.exit(1)
 722         end
 723
 724         uargs.ubus_rpc_session = nil
 725
 726         local k, v
 727         local margs = method.args or {}
 728         for k, v in pairs(uargs) do
 729                 if margs[k] == nil or
 730                    (v ~= nil and type(v) ~= type(margs[k]))
 731                 then
 732                         print(json.stringify({ error = "Invalid arguments" }))
 733                         os.exit(1)
 734                 end
 735         end
 736
 737         return method
 738 end
 739
 740 if arg[1] == "list" then
 741         local _, method, rv = nil, nil, {}
 742         for _, method in pairs(methods) do rv[_] = method.args or {} end
 743         print((json.stringify(rv):gsub(":%[%]", ":{}")))
 744 elseif arg[1] == "call" then
 745         local args = parseInput()
 746         local method = validateArgs(arg[2], args)
 747         local result, code = method.call(args)
 748         print((json.stringify(result):gsub("^%[%]$", "{}")))
 749         os.exit(code or 0)
 750 end