lua/lexers/systemd.lua

   1 -- Copyright 2016 Christian Hesse
   2 -- systemd unit file LPeg lexer.
   3
   4 local l = require('lexer')
   5 local token, word_match = l.token, l.word_match
   6 local P, R, S = lpeg.P, lpeg.R, lpeg.S
   7
   8 local M = {_NAME = 'systemd'}
   9
  10 -- Whitespace.
  11 local ws = token(l.WHITESPACE, l.space^1)
  12
  13 -- Comments.
  14 local comment = token(l.COMMENT, l.starts_line(S(';#')) * l.nonnewline^0)
  15
  16 -- Strings.
  17 local sq_str = l.delimited_range("'")
  18 local dq_str = l.delimited_range('"')
  19 local section_word = word_match{
  20   'Automount',
  21   'BusName',
  22   'Install',
  23   'Mount',
  24   'Path',
  25   'Service',
  26   'Service',
  27   'Socket',
  28   'Timer',
  29   'Unit'
  30 }
  31 local string = token(l.STRING, sq_str + dq_str + '[' * section_word * ']')
  32
  33 -- Numbers.
  34 local dec = l.digit^1 * ('_' * l.digit^1)^0
  35 local oct_num = '0' * S('01234567_')^1
  36 local integer = S('+-')^-1 * (l.hex_num + oct_num + dec)
  37 local number = token(l.NUMBER, (l.float + integer))
  38
  39 -- Keywords.
  40 local keyword = token(l.KEYWORD, word_match({
  41   -- boolean values
  42   'true',
  43   'false',
  44   'on',
  45   'off',
  46   'yes',
  47   'no',
  48
  49   -- service types
  50   'forking',
  51   'simple',
  52   'oneshot',
  53   'dbus',
  54   'notify',
  55   'idle',
  56
  57   -- special system units
  58   'basic.target',
  59   'ctrl-alt-del.target',
  60   'cryptsetup.target',
  61   'dbus.service',
  62   'dbus.socket',
  63   'default.target',
  64   'display-manager.service',
  65   'emergency.target',
  66   'exit.target',
  67   'final.target',
  68   'getty.target',
  69   'graphical.target',
  70   'hibernate.target',
  71   'hybrid-sleep.target',
  72   'halt.target',
  73   'initrd-fs.target',
  74   'kbrequest.target',
  75   'kexec.target',
  76   'local-fs.target',
  77   'multi-user.target',
  78   'network-online.target',
  79   'paths.target',
  80   'poweroff.target',
  81   'reboot.target',
  82   'remote-fs.target',
  83   'rescue.target',
  84   'initrd-root-fs.target',
  85   'runlevel2.target',
  86   'runlevel3.target',
  87   'runlevel4.target',
  88   'runlevel5.target',
  89   'shutdown.target',
  90   'sigpwr.target',
  91   'sleep.target',
  92   'slices.target',
  93   'sockets.target',
  94   'suspend.target',
  95   'swap.target',
  96   'sysinit.target',
  97   'syslog.socket',
  98   'system-update.target',
  99   'timers.target',
 100   'umount.target',
 101
 102   -- special system units for devices
 103   'bluetooth.target',
 104   'printer.target',
 105   'smartcard.target',
 106   'sound.target',
 107
 108   -- special passive system units
 109   'cryptsetup-pre.target',
 110   'local-fs-pre.target',
 111   'network.target',
 112   'network-pre.target',
 113   'nss-lookup.target',
 114   'nss-user-lookup.target',
 115   'remote-fs-pre.target',
 116   'rpcbind.target',
 117   'time-sync.target',
 118
 119   -- specail slice units
 120   '-.slice',
 121   'system.slice',
 122   'user.slice',
 123   'machine.slice',
 124
 125   -- environment variables
 126   'PATH',
 127   'LANG',
 128   'USER',
 129   'LOGNAME',
 130   'HOME',
 131   'SHELL',
 132   'XDG_RUNTIME_DIR',
 133   'XDG_SESSION_ID',
 134   'XDG_SEAT',
 135   'XDG_VTNR',
 136   'MAINPID',
 137   'MANAGERPID',
 138   'LISTEN_FDS',
 139   'LISTEN_PID',
 140   'LISTEN_FDNAMES',
 141   'NOTIFY_SOCKET',
 142   'WATCHDOG_PID',
 143   'WATCHDOG_USEC',
 144   'TERM'
 145 }, '.-'))
 146
 147 -- Options.
 148 local option_word = word_match{
 149   -- unit section options
 150   'Description',
 151   'Documentation',
 152   'Requires',
 153   'Requisite',
 154   'Wants',
 155   'BindsTo',
 156   'PartOf',
 157   'Conflicts',
 158   'Before',
 159   'After',
 160   'OnFailure',
 161   'PropagatesReloadTo',
 162   'ReloadPropagatedFrom',
 163   'JoinsNamespaceOf',
 164   'RequiresMountsFor',
 165   'OnFailureJobMode',
 166   'IgnoreOnIsolate',
 167   'StopWhenUnneeded',
 168   'RefuseManualStart',
 169   'RefuseManualStop',
 170   'AllowIsolate',
 171   'DefaultDependencies',
 172   'JobTimeoutSec',
 173   'JobTimeoutAction',
 174   'JobTimeoutRebootArgument',
 175   'StartLimitInterval',
 176   'StartLimitBurst',
 177   'StartLimitAction',
 178   'RebootArgument',
 179   'ConditionArchitecture',
 180   'ConditionVirtualization',
 181   'ConditionHost',
 182   'ConditionKernelCommandLine',
 183   'ConditionSecurity',
 184   'ConditionCapability',
 185   'ConditionACPower',
 186   'ConditionNeedsUpdate',
 187   'ConditionFirstBoot',
 188   'ConditionPathExists',
 189   'ConditionPathExistsGlob',
 190   'ConditionPathIsDirectory',
 191   'ConditionPathIsSymbolicLink',
 192   'ConditionPathIsMountPoint',
 193   'ConditionPathIsReadWrite',
 194   'ConditionDirectoryNotEmpty',
 195   'ConditionFileNotEmpty',
 196   'ConditionFileIsExecutable',
 197   'AssertArchitecture',
 198   'AssertVirtualization',
 199   'AssertHost',
 200   'AssertKernelCommandLine',
 201   'AssertSecurity',
 202   'AssertCapability',
 203   'AssertACPower',
 204   'AssertNeedsUpdate',
 205   'AssertFirstBoot',
 206   'AssertPathExists',
 207   'AssertPathExistsGlob',
 208   'AssertPathIsDirectory',
 209   'AssertPathIsSymbolicLink',
 210   'AssertPathIsMountPoint',
 211   'AssertPathIsReadWrite',
 212   'AssertDirectoryNotEmpty',
 213   'AssertFileNotEmpty',
 214   'AssertFileIsExecutable',
 215   'SourcePath',
 216
 217   -- install section options
 218   'Alias',
 219   'WantedBy',
 220   'RequiredBy',
 221   'Also',
 222   'DefaultInstance',
 223
 224   -- service section options
 225   'Type',
 226   'RemainAfterExit',
 227   'GuessMainPID',
 228   'PIDFile',
 229   'BusName',
 230   'BusPolicy',
 231   'ExecStart',
 232   'ExecStartPre',
 233   'ExecStartPost',
 234   'ExecReload',
 235   'ExecStop',
 236   'ExecStopPost',
 237   'RestartSec',
 238   'TimeoutStartSec',
 239   'TimeoutStopSec',
 240   'TimeoutSec',
 241   'RuntimeMaxSec',
 242   'WatchdogSec',
 243   'Restart',
 244   'SuccessExitStatus',
 245   'RestartPreventExitStatus',
 246   'RestartForceExitStatus',
 247   'PermissionsStartOnly',
 248   'RootDirectoryStartOnly',
 249   'NonBlocking',
 250   'NotifyAccess',
 251   'Sockets',
 252   'FailureAction',
 253   'FileDescriptorStoreMax',
 254   'USBFunctionDescriptors',
 255   'USBFunctionStrings',
 256
 257   -- socket section options
 258   'ListenStream',
 259   'ListenDatagram',
 260   'ListenSequentialPacket',
 261   'ListenFIFO',
 262   'ListenSpecial',
 263   'ListenNetlink',
 264   'ListenMessageQueue',
 265   'ListenUSBFunction',
 266   'SocketProtocol',
 267   'BindIPv6Only',
 268   'Backlog',
 269   'BindToDevice',
 270   'SocketUser',
 271   'SocketGroup',
 272   'SocketMode',
 273   'DirectoryMode',
 274   'Accept',
 275   'Writable',
 276   'MaxConnections',
 277   'KeepAlive',
 278   'KeepAliveTimeSec',
 279   'KeepAliveIntervalSec',
 280   'KeepAliveProbes',
 281   'NoDelay',
 282   'Priority',
 283   'DeferAcceptSec',
 284   'ReceiveBuffer',
 285   'SendBuffer',
 286   'IPTOS',
 287   'IPTTL',
 288   'Mark',
 289   'ReusePort',
 290   'SmackLabel',
 291   'SmackLabelIPIn',
 292   'SmackLabelIPOut',
 293   'SELinuxContextFromNet',
 294   'PipeSize',
 295   'MessageQueueMaxMessages',
 296   'MessageQueueMessageSize',
 297   'FreeBind',
 298   'Transparent',
 299   'Broadcast',
 300   'PassCredentials',
 301   'PassSecurity',
 302   'TCPCongestion',
 303   'ExecStartPre',
 304   'ExecStartPost',
 305   'ExecStopPre',
 306   'ExecStopPost',
 307   'TimeoutSec',
 308   'Service',
 309   'RemoveOnStop',
 310   'Symlinks',
 311   'FileDescriptorName',
 312
 313   -- mount section options
 314   'What',
 315   'Where',
 316   'Type',
 317   'Options',
 318   'SloppyOptions',
 319   'DirectoryMode',
 320   'TimeoutSec',
 321
 322   -- path section options
 323   'PathExists',
 324   'PathExistsGlob',
 325   'PathChanged',
 326   'PathModified',
 327   'DirectoryNotEmpty',
 328   'Unit',
 329   'MakeDirectory',
 330   'DirectoryMode',
 331
 332   -- timer section options
 333   'OnActiveSec',
 334   'OnBootSec',
 335   'OnStartupSec',
 336   'OnUnitActiveSec',
 337   'OnUnitInactiveSec',
 338   'OnCalendar',
 339   'AccuracySec',
 340   'RandomizedDelaySec',
 341   'Unit',
 342   'Persistent',
 343   'WakeSystem',
 344   'RemainAfterElapse',
 345
 346   -- exec section options
 347   'WorkingDirectory',
 348   'RootDirectory',
 349   'User',
 350   'Group',
 351   'SupplementaryGroups',
 352   'Nice',
 353   'OOMScoreAdjust',
 354   'IOSchedulingClass',
 355   'IOSchedulingPriority',
 356   'CPUSchedulingPolicy',
 357   'CPUSchedulingPriority',
 358   'CPUSchedulingResetOnFork',
 359   'CPUAffinity',
 360   'UMask',
 361   'Environment',
 362   'EnvironmentFile',
 363   'PassEnvironment',
 364   'StandardInput',
 365   'StandardOutput',
 366   'StandardError',
 367   'TTYPath',
 368   'TTYReset',
 369   'TTYVHangup',
 370   'TTYVTDisallocate',
 371   'SyslogIdentifier',
 372   'SyslogFacility',
 373   'SyslogLevel',
 374   'SyslogLevelPrefix',
 375   'TimerSlackNSec',
 376   'LimitCPU',
 377   'LimitFSIZE',
 378   'LimitDATA',
 379   'LimitSTACK',
 380   'LimitCORE',
 381   'LimitRSS',
 382   'LimitNOFILE',
 383   'LimitAS',
 384   'LimitNPROC',
 385   'LimitMEMLOCK',
 386   'LimitLOCKS',
 387   'LimitSIGPENDING',
 388   'LimitMSGQUEUE',
 389   'LimitNICE',
 390   'LimitRTPRIO',
 391   'LimitRTTIME',
 392   'PAMName',
 393   'CapabilityBoundingSet',
 394   'AmbientCapabilities',
 395   'SecureBits',
 396   'Capabilities',
 397   'ReadWriteDirectories',
 398   'ReadOnlyDirectories',
 399   'InaccessibleDirectories',
 400   'PrivateTmp',
 401   'PrivateDevices',
 402   'PrivateNetwork',
 403   'ProtectSystem',
 404   'ProtectHome',
 405   'MountFlags',
 406   'UtmpIdentifier',
 407   'UtmpMode',
 408   'SELinuxContext',
 409   'AppArmorProfile',
 410   'SmackProcessLabel',
 411   'IgnoreSIGPIPE',
 412   'NoNewPrivileges',
 413   'SystemCallFilter',
 414   'SystemCallErrorNumber',
 415   'SystemCallArchitectures',
 416   'RestrictAddressFamilies',
 417   'Personality',
 418   'RuntimeDirectory',
 419   'RuntimeDirectoryMode'
 420 }
 421 local preproc = token(l.PREPROCESSOR, option_word)
 422
 423 -- Identifiers.
 424 local word = (l.alpha + '_') * (l.alnum + S('_.'))^0
 425 local identifier = token(l.IDENTIFIER, word)
 426
 427 -- Operators.
 428 local operator = token(l.OPERATOR, '=')
 429
 430 M._rules = {
 431   {'whitespace', ws},
 432   {'keyword', keyword},
 433   {'string', string},
 434   {'preproc', preproc},
 435   {'identifier', identifier},
 436   {'comment', comment},
 437   {'number', number},
 438   {'operator', operator},
 439 }
 440
 441 M._LEXBYLINE = true
 442
 443 return M