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FreeBSD 11.0 - man page for loader.conf (freebsd section 5)

LOADER.CONF(5)			     BSD File Formats Manual			   LOADER.CONF(5)

     loader.conf -- system bootstrap configuration information

     The file loader.conf contains descriptive information on bootstrapping the system.  Through
     it you can specify the kernel to be booted, parameters to be passed to it, and additional
     modules to be loaded; and generally set all variables described in loader(8).

     The file /boot/loader.rc must contain the following two lines for loader.conf to be automat-
     ically processed:

	   include /boot/loader.4th

     If no /boot/loader.rc exists at installworld time, one with the above lines will be

     Though loader.conf's format was defined explicitly to resemble rc.conf(5), and can be
     sourced by sh(1), some settings are treated in a special fashion.	Also, the behavior of
     some settings is defined by the setting's suffix; the prefix identifies which module the
     setting controls.

     The general parsing rules are:

     o	 Spaces and empty lines are ignored.

     o	 A # sign will mark the remainder of the line as a comment.

     o	 Only one setting can be present on each line.

     All settings have the following format:


     Unless it belongs to one of the classes of settings that receive special treatment, a set-
     ting will set the value of a loader(8) environment variable.  The settings that receive spe-
     cial treatment are listed below.  Settings beginning with "*" below define the modules to be
     loaded and may have any prefix; the prefix identifies a module.  All such settings sharing a
     common prefix refer to the same module.

     exec	   Immediately executes a loader(8) command.  This type of setting cannot be pro-
		   cessed by programs other than loader(8), so its use should be avoided.  Multi-
		   ple instances of it will be processed independently.

		   Defines additional configuration files to be processed right after the present

     kernel	   Name of the kernel to be loaded.  If no kernel name is set, no additional mod-
		   ules will be loaded.  The name must be a subdirectory of /boot that contains a

		   Flags to be passed to the kernel.

     password	   Protect boot menu with a password without interrupting autoboot process.  The
		   password should be in clear text format.  If a password is set, boot menu will
		   not appear until any key is pressed during countdown period specified by
		   autoboot_delay variable or autoboot process fails.  In both cases user should
		   provide specified password to be able to access boot menu.

		   Provides a password to be required by check-password before execution is
		   allowed to continue.  The password should be in clear text format.  If a pass-
		   word is set, the user must provide specified password to boot.

		   If set to ``YES'', module names will be displayed as they are loaded.

     *_load	   If set to ``YES'', that module will be loaded.  If no name is defined (see
		   below), the module's name is taken to be the same as the prefix.

     *_name	   Defines the name of the module.

     *_type	   Defines the module's type.  If none is given, it defaults to a kld module.

     *_flags	   Flags and parameters to be passed to the module.

     *_before	   Commands to be executed before the module is loaded.  Use of this setting
		   should be avoided.

     *_after	   Commands to be executed after the module is loaded.	Use of this setting
		   should be avoided.

     *_error	   Commands to be executed if the loading of a module fails.  Except for the spe-
		   cial value ``abort'', which aborts the bootstrap process, use of this setting
		   should be avoided.

     WARNING: developers should never use these suffixes for any kernel environment variables
     (tunables) or conflicts will result.

     Most of loader.conf's default settings can be ignored.  The few of them which are important
     or useful are:

		     (``NO'') If set to ``YES'', a bitmap will be loaded to be displayed on
		     screen while booting.

		     (``/boot/splash.bmp'') Name of the bitmap to be loaded.  Any other name can
		     be used.

		     (``9600'' or the value of the BOOT_COMCONSOLE_SPEED variable when loader(8)
		     was compiled).  Sets the speed of the serial console.  If the previous boot
		     loader stage specified that a serial console is in use then the default
		     speed is determined from the current serial port speed setting.

	   console   (``vidconsole'') ``comconsole'' selects serial console, ``vidconsole''
		     selects the video console, ``nullconsole'' selects a mute console (useful
		     for systems with neither a video console nor a serial port), and
		     ``spinconsole'' selects the video console which prevents any input and hides
		     all output replacing it with ``spinning'' character (useful for embedded
		     products and such).

	   kernel    (``kernel'')

	   kernels   (``kernel kernel.old'') Space or comma separated list of kernels to present
		     in the boot menu.

		     (``/boot/loader.conf /boot/loader.conf.local'')

		     (``NO'') If set to ``YES'', will load the splash screen module, making it
		     possible to display a bmp image on the screen while booting.

		     (``NO'') If set to ``YES'', will load the splash screen module, making it
		     possible to display a pcx image on the screen while booting.

		     (``NO'') If set to ``YES'', the vesa module will be loaded, enabling bitmaps
		     above VGA resolution to be displayed.

		     If set to ``YES'', the beastie boot menu will be skipped.	The beastie boot
		     menu is always skipped if booting UEFI or running non-x86 hardware.

	   loader_logo (``orbbw'')
		     Selects a desired logo in the beastie boot menu.  Possible values are:
		     ``orbbw'', ``orb'', ``fbsdbw'', ``beastiebw'', ``beastie'', and ``none''.

		     If set to ``NO'', the beastie boot menu will be displayed without ANSI col-

     /boot/defaults/loader.conf  default settings -- do not change this file.
     /boot/loader.4th		 defines the commands used by loader to read and process
     /boot/loader.conf		 user defined settings.
     /boot/loader.conf.local	 machine-specific settings for sites with a common loader.conf.
     /boot/loader.rc		 contains the instructions to automatically process loader.conf.

     boot(8), loader(8), loader.4th(8)

     The file loader.conf first appeared in FreeBSD 3.2.

     This manual page was written by Daniel C. Sobral <dcs@FreeBSD.org>.

     The loader(8) stops reading loader.conf when it encounters a syntax error, so any options
     which are vital for booting a particular system (i.e. ``hw.ata.ata_dma=0'') should precede
     any experimental additions to loader.conf.

BSD					  April 27, 2014				      BSD

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