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LOADER.4TH(8) BSD System Manager's Manual LOADER.4TH(8) NAME loader.4th -- loader.conf processing tools DESCRIPTION The file that goes by the name of loader.4th is a set of commands de- signed to manipulate loader.conf(5) files. The default /boot/loader.rc includes loader.4th and uses one of its commands to automatically read and process the standard loader.conf(5) files. Other commands exists to help the user specify alternate configurations. The commands of loader.4th by themselves are not enough for most uses. Please refer to the examples below for the most common situations, and to loader(8) for additional commands. Before using any of the commands provided in loader.4th, it must be in- cluded through the command: include loader.4th This line is present in the default /boot/loader.rc file, so it isn't needed (and should not be re-issued) in a normal setup. The commands provided by it are: boot boot kernelname [...] boot directory [...] boot -flag ... Boot as specified by the loader.conf(5) files read. Depending on the arguments passed, it can override boot flags and either the kernel name or the search path for kernel and mod- ules. boot-conf boot-conf kernelname [...] boot-conf directory [...] boot-conf -flag ... Works like boot described above, but instead of booting immediately, uses autoboot, so it can be stopped. start Reads /boot/defaults/loader.conf, all other loader.conf(5) files specified in it, and then proceeds to boot as specified in them. This is the command used in the default /boot/loader.rc file, and it uses the autoboot command (see loader(8)), so it can be stopped for further interaction with loader(8). initialize Initialize the supporting library so com- mands can be used without executing start first. Like start, reads /boot/defaults/loader.conf and all other loader.conf(5) files specified in it. Re- turns a flag on the stack to indicate if any configuration file was successfully loaded. read-conf filename Reads and processes a loader.conf(5) file. Does not proceed to boot. enable-module module Enables the loading of module. disable-module module Disables the loading of module. toggle-module module Toggles the loading of module on and off. show-module module Shows the information gathered in the loader.conf(5) files about the module module. retry Used inside loader.conf(5) files to specify the action after a module loading fails. ignore Used inside loader.conf(5) files to specify the action after a module loading fails. FILES /boot/loader The loader(8). /boot/loader.4th loader.4th itself. /boot/loader.rc loader(8) bootstrapping script. /boot/defaults/loader.conf File loaded by the start command. EXAMPLES Standard /boot/loader.rc: include /boot/loader.4th start Load a different kernel with the standard configuration: set kernel="/boot/kernel.old/kernel" unload boot-conf Read an additional configuration file and then proceed to boot: unload read-conf /boot/special.conf boot-conf Disable the loading of the splash screen module and bitmap and then pro- ceed to boot: unload disable-module splash_bmp disable-module bitmap boot-conf SEE ALSO loader.conf(5), loader(8) HISTORY The loader.4th set of commands first appeared in FreeBSD 3.2. AUTHORS The loader.4th set of commands was written by Daniel C. Sobral <dcs@FreeBSD.org>. BUGS A British espionage series. BSD April 25, 1999 BSD
NAME | DESCRIPTION | FILES | EXAMPLES | SEE ALSO | HISTORY | AUTHORS | BUGS
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