man/systemd.special.xml

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  23
  24 <refentry id="systemd.special">
  25
  26         <refentryinfo>
  27                 <title>systemd.special</title>
  28                 <productname>systemd</productname>
  29
  30                 <authorgroup>
  31                         <author>
  32                                 <contrib>Developer</contrib>
  33                                 <firstname>Lennart</firstname>
  34                                 <surname>Poettering</surname>
  35                                 <email>lennart@poettering.net</email>
  36                         </author>
  37                 </authorgroup>
  38         </refentryinfo>
  39
  40         <refmeta>
  41                 <refentrytitle>systemd.special</refentrytitle>
  42                 <manvolnum>7</manvolnum>
  43         </refmeta>
  44
  45         <refnamediv>
  46                 <refname>systemd.special</refname>
  47                 <refpurpose>Special systemd units</refpurpose>
  48         </refnamediv>
  49
  50         <refsynopsisdiv>
  51                 <para><filename>basic.target</filename>,
  52                 <filename>ctrl-alt-del.target</filename>,
  53                 <filename>dbus.service</filename>,
  54                 <filename>dbus.socket</filename>,
  55                 <filename>default.target</filename>,
  56                 <filename>display-manager.service</filename>,
  57                 <filename>emergency.target</filename>,
  58                 <filename>exit.service</filename>,
  59                 <filename>final.service</filename>,
  60                 <filename>graphical.target</filename>,
  61                 <filename>http-daemon.target</filename>,
  62                 <filename>halt.target</filename>,
  63                 <filename>kbrequest.target</filename>,
  64                 <filename>kexec.target</filename>,
  65                 <filename>local-fs.target</filename>,
  66                 <filename>local-fs-pre.target</filename>,
  67                 <filename>mail-transfer-agent.target</filename>,
  68                 <filename>multi-user.target</filename>,
  69                 <filename>network.target</filename>,
  70                 <filename>nss-lookup.target</filename>,
  71                 <filename>poweroff.target</filename>,
  72                 <filename>reboot.target</filename>,
  73                 <filename>remote-fs.target</filename>,
  74                 <filename>remote-fs-pre.target</filename>,
  75                 <filename>rescue.target</filename>,
  76                 <filename>rpcbind.target</filename>,
  77                 <filename>runlevel2.target</filename>,
  78                 <filename>runlevel3.target</filename>,
  79                 <filename>runlevel4.target</filename>,
  80                 <filename>runlevel5.target</filename>,
  81                 <filename>shutdown.target</filename>,
  82                 <filename>sigpwr.target</filename>,
  83                 <filename>sockets.target</filename>,
  84                 <filename>swap.target</filename>,
  85                 <filename>sysinit.target</filename>,
  86                 <filename>syslog.service</filename>,
  87                 <filename>syslog.socket</filename>,
  88                 <filename>syslog.target</filename>,
  89                 <filename>time-sync.target</filename>,
  90                 <filename>umount.target</filename></para>
  91         </refsynopsisdiv>
  92
  93         <refsect1>
  94                 <title>Description</title>
  95
  96                 <para>A few units are treated specially by
  97                 systemd. They have special internal semantics and
  98                 cannot be renamed.</para>
  99         </refsect1>
 100
 101         <refsect1>
 102                 <title>Special System Units</title>
 103
 104                 <variablelist>
 105                         <varlistentry>
 106                                 <term><filename>basic.target</filename></term>
 107                                 <listitem>
 108                                         <para>A special target unit
 109                                         covering early boot-up.</para>
 110                                         <para>systemd automatically
 111                                         adds dependencies of the types
 112                                         Requires and After for this
 113                                         target unit to all SysV
 114                                         service units configured for
 115                                         runlevel 1 to 5.</para>
 116                                         <para>Usually this should pull-in
 117                                         all sockets, mount points,
 118                                         swap devices and other basic
 119                                         initialization necessary for
 120                                         the general purpose
 121                                         daemons. Most normal daemons
 122                                         should have dependencies of
 123                                         type After and Requires on
 124                                         this unit.</para>
 125                                 </listitem>
 126                         </varlistentry>
 127                         <varlistentry>
 128                                 <term><filename>ctrl-alt-del.target</filename></term>
 129                                 <listitem>
 130                                         <para>systemd starts this
 131                                         target whenever
 132                                         Control+Alt+Del is pressed on
 133                                         the console. Usually this
 134                                         should be aliased (symlinked)
 135                                         to
 136                                         <filename>reboot.target</filename>.</para>
 137                                 </listitem>
 138                         </varlistentry>
 139                         <varlistentry>
 140                                 <term><filename>dbus.service</filename></term>
 141                                 <listitem>
 142                                         <para>A special unit for the
 143                                         D-Bus system bus. As soon as
 144                                         this service is fully started
 145                                         up systemd will connect to it
 146                                         and register its
 147                                         service.</para>
 148                                 </listitem>
 149                         </varlistentry>
 150                         <varlistentry>
 151                                 <term><filename>dbus.socket</filename></term>
 152                                 <listitem>
 153                                         <para>A special unit for the
 154                                         D-Bus system bus socket. All
 155                                         units with
 156                                         <literal>Type=dbus</literal>
 157                                         automatically gain a
 158                                         dependency on this
 159                                         unit.</para>
 160                                 </listitem>
 161                         </varlistentry>
 162                         <varlistentry>
 163                                 <term><filename>default.target</filename></term>
 164                                 <listitem>
 165                                         <para>The default unit systemd
 166                                         starts at bootup. Usually this
 167                                         should be aliased (symlinked)
 168                                         to
 169                                         <filename>multi-user.target</filename>
 170                                         or
 171                                         <filename>graphical.target</filename>.</para>
 172                                         <para>The default unit systemd
 173                                         starts at bootup can be
 174                                         overridden with the
 175                                         <varname>systemd.unit=</varname>
 176                                         kernel command line option.</para>
 177                                 </listitem>
 178                         </varlistentry>
 179                         <varlistentry>
 180                                 <term><filename>display-manager.service</filename></term>
 181                                 <listitem>
 182                                         <para>The display manager
 183                                         service. Usually this should
 184                                         be aliased (symlinked) to
 185                                         <filename>gdm.service</filename>
 186                                         or a similar display manager
 187                                         service.</para>
 188                                         <para>systemd automatically
 189                                         adds dependencies of type
 190                                         After for this target unit to
 191                                         all SysV init script service
 192                                         units with a LSB header
 193                                         referring to the
 194                                         <literal>$x-display-manager</literal>
 195                                         facility, for compatibility
 196                                         with Debian.</para>
 197                                 </listitem>
 198                         </varlistentry>
 199                         <varlistentry>
 200                                 <term><filename>emergency.target</filename></term>
 201                                 <listitem>
 202                                         <para>A special target unit
 203                                         that starts an emergency
 204                                         shell on the main
 205                                         console. This unit is supposed
 206                                         to be used with the kernel
 207                                         command line option
 208                                         <varname>systemd.unit=</varname>
 209                                         and has otherwise little use.
 210                                         </para>
 211                                 </listitem>
 212                         </varlistentry>
 213                         <varlistentry>
 214                                 <term><filename>final.target</filename></term>
 215                                 <listitem>
 216                                         <para>A special target unit
 217                                         that is used during the
 218                                         shutdown logic and may be used
 219                                         to pull in late services after
 220                                         all normal services are
 221                                         already terminated and all
 222                                         mounts unmounted.
 223                                         </para>
 224                                 </listitem>
 225                         </varlistentry>
 226                         <varlistentry>
 227                                 <term><filename>graphical.target</filename></term>
 228                                 <listitem>
 229                                         <para>A special target unit
 230                                         for setting up a graphical
 231                                         login screen. This pulls in
 232                                         <filename>multi-user.target</filename>.</para>
 233
 234                                         <para>Units that are needed
 235                                         for graphical login shall add
 236                                         Wants dependencies for their
 237                                         unit to this unit (or
 238                                         <filename>multi-user.target</filename>)
 239                                         during installation.</para>
 240                                 </listitem>
 241                         </varlistentry>
 242                         <varlistentry>
 243                                 <term><filename>http-daemon.target</filename></term>
 244                                 <listitem>
 245                                         <para>A target for pulling in
 246                                         an HTTP server if there is
 247                                         any.</para>
 248                                         <para>systemd automatically
 249                                         adds dependencies of type
 250                                         After for this target unit to
 251                                         all SysV init script service
 252                                         units with a LSB header
 253                                         referring to the
 254                                         <literal>$httpd</literal>
 255                                         facility.</para>
 256                                 </listitem>
 257                         </varlistentry>
 258                         <varlistentry>
 259                                 <term><filename>halt.target</filename></term>
 260                                 <listitem>
 261                                         <para>A special target unit
 262                                         for shutting down and halting the system.</para>
 263
 264                                         <para>Applications wanting to
 265                                         halt the system should start
 266                                         this unit.</para>
 267                                 </listitem>
 268                         </varlistentry>
 269                         <varlistentry>
 270                                 <term><filename>kbrequest.target</filename></term>
 271                                 <listitem>
 272                                         <para>systemd starts this
 273                                         target whenever Alt+ArrowUp is
 274                                         pressed on the console. This
 275                                         is a good candidate to be
 276                                         aliased (symlinked) to
 277                                         <filename>rescue.target</filename>.</para>
 278                                 </listitem>
 279                         </varlistentry>
 280                         <varlistentry>
 281                                 <term><filename>kexec.target</filename></term>
 282                                 <listitem>
 283                                         <para>A special target unit
 284                                         for shutting down and rebooting the system via kexec.</para>
 285
 286                                         <para>Applications wanting to
 287                                         reboot the system with kexec should start
 288                                         this unit.</para>
 289                                 </listitem>
 290                         </varlistentry>
 291                         <varlistentry>
 292                                 <term><filename>local-fs.target</filename></term>
 293                                 <listitem>
 294                                         <para>systemd automatically
 295                                         adds dependencies of type
 296                                         After to all mount units that
 297                                         refer to local mount points
 298                                         for this target unit. In
 299                                         addition, systemd adds
 300                                         dependencies of type Wants to
 301                                         this target unit for those
 302                                         mounts listed in
 303                                         <filename>/etc/fstab</filename>
 304                                         that have the
 305                                         <option>auto</option> and
 306                                         <option>comment=systemd.mount</option>
 307                                         mount options set.</para>
 308
 309                                         <para>systemd automatically
 310                                         adds dependencies of type
 311                                         After for this target unit to
 312                                         all SysV init script service
 313                                         units with an LSB header
 314                                         referring to the
 315                                         <literal>$local_fs</literal>
 316                                         facility.</para>
 317                                 </listitem>
 318                         </varlistentry>
 319                         <varlistentry>
 320                                 <term><filename>local-fs-pre.target</filename></term>
 321                                 <listitem>
 322                                         <para>This target unit is
 323                                         automatically ordered before
 324                                         all local mount points marked
 325                                         with <option>auto</option>
 326                                         (see above). It can be used to
 327                                         execute certain units before
 328                                         all local mounts.</para>
 329                                 </listitem>
 330                         </varlistentry>
 331                         <varlistentry>
 332                                 <term><filename>mail-transfer-agent.target</filename></term>
 333                                 <listitem>
 334                                         <para>The mail transfer agent
 335                                         (MTA) service. Usually this
 336                                         should pull-in all units
 337                                         necessary for
 338                                         sending/receiving mails on the
 339                                         local host.</para>
 340
 341                                         <para>systemd automatically
 342                                         adds dependencies of type
 343                                         After for this target unit to
 344                                         all SysV init script service
 345                                         units with an LSB header
 346                                         referring to the
 347                                         <literal>$mail-transfer-agent</literal>
 348                                         or
 349                                         <literal>$mail-transport-agent</literal>
 350                                         facilities, for compatibility
 351                                         with Debian.</para>
 352                                 </listitem>
 353                         </varlistentry>
 354                         <varlistentry>
 355                                 <term><filename>multi-user.target</filename></term>
 356                                 <listitem>
 357                                         <para>A special target unit
 358                                         for setting up a multi-user
 359                                         system (non-graphical). This
 360                                         is pulled in by
 361                                         <filename>graphical.target</filename>.</para>
 362
 363                                         <para>Units that are needed
 364                                         for a multi-user system shall
 365                                         add Wants dependencies to
 366                                         this unit for their unit during
 367                                         installation.</para>
 368                                 </listitem>
 369                         </varlistentry>
 370                         <varlistentry>
 371                                 <term><filename>network.target</filename></term>
 372                                 <listitem>
 373                                         <para>systemd automatically
 374                                         adds dependencies of type
 375                                         After for this target unit to
 376                                         all SysV init script service
 377                                         units with an LSB header
 378                                         referring to the
 379                                         <literal>$network</literal>
 380                                         facility.</para>
 381                                 </listitem>
 382                         </varlistentry>
 383                         <varlistentry>
 384                                 <term><filename>nss-lookup.target</filename></term>
 385                                 <listitem>
 386                                         <para>systemd automatically
 387                                         adds dependencies of type
 388                                         After for this target unit to
 389                                         all SysV init script service
 390                                         units with an LSB header
 391                                         referring to the
 392                                         <literal>$named</literal>
 393                                         facility.</para>
 394                                 </listitem>
 395                         </varlistentry>
 396                         <varlistentry>
 397                                 <term><filename>poweroff.target</filename></term>
 398                                 <listitem>
 399                                         <para>A special target unit
 400                                         for shutting down and powering off the system.</para>
 401
 402                                         <para>Applications wanting to
 403                                         power off the system should start
 404                                         this unit.</para>
 405
 406                                         <para><filename>runlevel0.target</filename>
 407                                         is an alias for this target
 408                                         unit, for compatibility with SysV.</para>
 409                                 </listitem>
 410                         </varlistentry>
 411                         <varlistentry>
 412                                 <term><filename>reboot.target</filename></term>
 413                                 <listitem>
 414                                         <para>A special target unit
 415                                         for shutting down and rebooting the system.</para>
 416
 417                                         <para>Applications wanting to
 418                                         reboot the system should start
 419                                         this unit.</para>
 420
 421                                         <para><filename>runlevel6.target</filename>
 422                                         is an alias for this target
 423                                         unit, for compatibility with SysV.</para>
 424                                 </listitem>
 425                         </varlistentry>
 426                         <varlistentry>
 427                                 <term><filename>remote-fs.target</filename></term>
 428                                 <listitem>
 429                                         <para>Similar to
 430                                         <filename>local-fs.target</filename>,
 431                                         but for remote mount
 432                                         points.</para>
 433
 434                                         <para>systemd automatically
 435                                         adds dependencies of type
 436                                         After for this target unit to
 437                                         all SysV init script service
 438                                         units with an LSB header
 439                                         referring to the
 440                                         <literal>$remote_fs</literal>
 441                                         facility.</para>
 442                                 </listitem>
 443                         </varlistentry>
 444                         <varlistentry>
 445                                 <term><filename>remote-fs-pre.target</filename></term>
 446                                 <listitem>
 447                                         <para>This target unit is
 448                                         automatically ordered before
 449                                         all remote mount points marked
 450                                         with <option>auto</option>
 451                                         (see above). It can be used to
 452                                         execute certain units before
 453                                         all remote mounts.</para>
 454                                 </listitem>
 455                         </varlistentry>
 456                         <varlistentry>
 457                                 <term><filename>rescue.target</filename></term>
 458                                 <listitem>
 459                                         <para>A special target unit
 460                                         for setting up the base system
 461                                         and a rescue shell.</para>
 462
 463                                         <para><filename>runlevel1.target</filename>
 464                                         is an alias for this target
 465                                         unit, for compatibility with SysV.</para>
 466                                 </listitem>
 467                         </varlistentry>
 468                         <varlistentry>
 469                                 <term><filename>rpcbind.target</filename></term>
 470                                 <listitem>
 471                                         <para>systemd automatically
 472                                         adds dependencies of type
 473                                         After for this target unit to
 474                                         all SysV init script service
 475                                         units with an LSB header
 476                                         referring to the
 477                                         <literal>$rpcbind</literal>
 478                                         facility.</para>
 479                                 </listitem>
 480                         </varlistentry>
 481                         <varlistentry>
 482                                 <term><filename>runlevel2.target</filename></term>
 483                                 <listitem>
 484                                         <para>This is a target that is
 485                                         called whenever the SysV
 486                                         compatibility code asks for
 487                                         runlevel 2. It is a good idea
 488                                         to make this an alias for
 489                                         (i.e. symlink to)
 490                                         <filename>multi-user.target</filename>.</para>
 491                                 </listitem>
 492                         </varlistentry>
 493                         <varlistentry>
 494                                 <term><filename>runlevel3.target</filename></term>
 495                                 <listitem>
 496                                         <para>This is a target that is
 497                                         called whenever the SysV
 498                                         compatibility code asks for
 499                                         runlevel 3. It is a good idea
 500                                         to make this an alias for
 501                                         (i.e. symlink to)
 502                                         <filename>multi-user.target</filename>
 503                                         or
 504                                         <filename>graphical.target</filename>.</para>
 505                                 </listitem>
 506                         </varlistentry>
 507                         <varlistentry>
 508                                 <term><filename>runlevel4.target</filename></term>
 509                                 <listitem>
 510                                         <para>This is a target that is
 511                                         called whenever the SysV
 512                                         compatibility code asks for
 513                                         runlevel 4. It is a good idea
 514                                         to make this an alias for
 515                                         (i.e. symlink to)
 516                                         <filename>multi-user.target</filename>
 517                                         or
 518                                         <filename>graphical.target</filename>.</para>
 519                                 </listitem>
 520                         </varlistentry>
 521                         <varlistentry>
 522                                 <term><filename>runlevel5.target</filename></term>
 523                                 <listitem>
 524                                         <para>This is a target that is
 525                                         called whenever the SysV
 526                                         compatibility code asks for
 527                                         runlevel 5. It is a good idea
 528                                         to make this an alias for
 529                                         (i.e. symlink to)
 530                                         <filename>multi-user.target</filename>
 531                                         or
 532                                         <filename>graphical.target</filename>.</para>
 533                                 </listitem>
 534                         </varlistentry>
 535                         <varlistentry>
 536                                 <term><filename>shutdown.target</filename></term>
 537                                 <listitem>
 538                                         <para>A special target unit
 539                                         that terminates the services
 540                                         on system shutdown.</para>
 541
 542                                         <para>Services that shall be
 543                                         terminated on system shutdown
 544                                         shall add Conflicts
 545                                         dependencies to this unit for
 546                                         their service unit, which is
 547                                         implicitly done when
 548                                         <varname>DefaultDependencies=yes</varname>
 549                                         is set (the default).</para>
 550
 551                                         <para>systemd automatically
 552                                         adds dependencies of type
 553                                         Conflicts to this target unit
 554                                         for all SysV init script
 555                                         service units that shall be
 556                                         terminated in SysV runlevels 0
 557                                         or 6.</para>
 558                                 </listitem>
 559                         </varlistentry>
 560                         <varlistentry>
 561                                 <term><filename>sigpwr.target</filename></term>
 562                                 <listitem>
 563                                         <para>A special target that is
 564                                         started when systemd receives
 565                                         the SIGPWR process signal,
 566                                         which is normally sent by the
 567                                         kernel or UPS daemons when
 568                                         power fails.</para>
 569                                 </listitem>
 570                         </varlistentry>
 571                         <varlistentry>
 572                                 <term><filename>sockets.target</filename></term>
 573                                 <listitem>
 574                                         <para>A special target unit
 575                                         that sets up all service
 576                                         sockets.</para>
 577
 578                                         <para>Services that can be
 579                                         socket-activated shall add
 580                                         Wants dependencies to this
 581                                         unit for their socket unit
 582                                         during installation.</para>
 583                                 </listitem>
 584                         </varlistentry>
 585                         <varlistentry>
 586                                 <term><filename>swap.target</filename></term>
 587                                 <listitem>
 588                                         <para>Similar to
 589                                         <filename>local-fs.target</filename>, but for swap
 590                                         partitions and swap
 591                                         files.</para>
 592                                 </listitem>
 593                         </varlistentry>
 594                         <varlistentry>
 595                                 <term><filename>sysinit.target</filename></term>
 596                                 <listitem>
 597                                         <para>A special target unit
 598                                         covering early boot-up scripts.</para>
 599                                         <para>systemd automatically
 600                                         adds dependencies of the types
 601                                         Wants and After for all
 602                                         SysV service units configured
 603                                         for runlevels that are not 0
 604                                         to 6 to this target unit.
 605                                         This covers the special
 606                                         boot-up runlevels some
 607                                         distributions have, such as S
 608                                         or b.</para>
 609                                 </listitem>
 610                         </varlistentry>
 611                         <varlistentry>
 612                                 <term><filename>syslog.service</filename></term>
 613                                 <listitem>
 614                                         <para>The syslog service if
 615                                         any. Implementations should
 616                                         create a symlink from the
 617                                         actual syslog implementation
 618                                         to this generic name for
 619                                         activating it.</para>
 620                                 </listitem>
 621                         </varlistentry>
 622                         <varlistentry>
 623                                 <term><filename>syslog.socket</filename></term>
 624                                 <listitem>
 625                                         <para>The socket unit where
 626                                         syslog implementations should
 627                                         listen on. All userspace log
 628                                         messages will be made
 629                                         available on this
 630                                         socket.</para>
 631                                 </listitem>
 632                         </varlistentry>
 633                         <varlistentry>
 634                                 <term><filename>syslog.target</filename></term>
 635                                 <listitem>
 636                                         <para>systemd automatically
 637                                         adds dependencies of type
 638                                         After for this target unit to
 639                                         all SysV init script service
 640                                         units with an LSB header
 641                                         referring to the
 642                                         <literal>$syslog</literal>
 643                                         facility.</para>
 644                                 </listitem>
 645                         </varlistentry>
 646                         <varlistentry>
 647                                 <term><filename>time-sync.target</filename></term>
 648                                 <listitem>
 649                                         <para>systemd automatically
 650                                         adds dependencies of type
 651                                         After for this target unit to
 652                                         all SysV init script service
 653                                         units with an LSB header
 654                                         referring to the
 655                                         <literal>$time</literal>
 656                                         facility.</para>
 657                                 </listitem>
 658                         </varlistentry>
 659                         <varlistentry>
 660                                 <term><filename>umount.target</filename></term>
 661                                 <listitem>
 662                                         <para>A special target unit
 663                                         that umounts all mount and
 664                                         automount points on system
 665                                         shutdown.</para>
 666
 667                                         <para>Mounts that shall be
 668                                         unmounted on system shutdown
 669                                         shall add Conflicts
 670                                         dependencies to this unit for
 671                                         their mount unit, which is
 672                                         implicitly done when
 673                                         <varname>DefaultDependencies=yes</varname>
 674                                         is set (the default).</para>
 675                                 </listitem>
 676                         </varlistentry>
 677                 </variablelist>
 678         </refsect1>
 679
 680         <refsect1>
 681                 <title>Special User Units</title>
 682
 683                 <para>When systemd runs as a user instance, the
 684                 following special units are available, which have
 685                 similar definitions as their system counterparts:
 686                 <filename>default.target</filename>,
 687                 <filename>shutdown.target</filename>,
 688                 <filename>sockets.target</filename></para>
 689
 690                 <para>In addition the following special unit is
 691                 understood only when systemd runs as service instance:</para>
 692
 693                 <variablelist>
 694                         <varlistentry>
 695                                 <term><filename>exit.service</filename></term>
 696                                 <listitem>
 697                                         <para>A special service unit
 698                                         for shutting down the
 699                                         user service manager.</para>
 700
 701                                         <para>Applications wanting to
 702                                         terminate the user service
 703                                         manager should start this
 704                                         unit. If systemd receives
 705                                         SIGTERM or SIGINT when running
 706                                         as user service daemon it will
 707                                         start this unit.</para>
 708
 709                                         <para>Normally, this pulls in
 710                                         <filename>shutdown.target</filename>
 711                                         which in turn should be
 712                                         conflicted by all units that
 713                                         want to be shut down on
 714                                         user service manager exit.</para>
 715                                 </listitem>
 716                         </varlistentry>
 717                 </variablelist>
 718         </refsect1>
 719
 720         <refsect1>
 721                   <title>See Also</title>
 722                   <para>
 723                           <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
 724                           <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
 725                           <citerefentry><refentrytitle>systemd.service</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
 726                           <citerefentry><refentrytitle>systemd.socket</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
 727                           <citerefentry><refentrytitle>systemd.target</refentrytitle><manvolnum>5</manvolnum></citerefentry>
 728                   </para>
 729         </refsect1>
 730
 731 </refentry>