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update_bootcfg(8): Add actually useful information

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Change-Id: I3f1aa2141827b3dc4072f2e8cedeecb40006e626
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Jacob Adams 2015-07-14 17:08:59 -04:00 committed by David van Moolenbroek
parent e01448dd84
commit 7b2da7b2c7
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minix/commands/update_bootcfg/update_bootcfg.8
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.TH man 8 "14 November 2014" "1.0" "update_bootcfg man page"
.TH man 8 "14 July 2015" "2.0" "update_bootcfg man page"
.SH NAME
update_bootcfg \- Update /boot.cfg
update_bootcfg \- Update the configuration for the boot monitor
.SH SYNOPSIS
update_bootcfg
.SH DESCRIPTION
Updates /boot.cfg from /etc/boot.cfg.default and /etc/boot.cfg.local
Updates /boot.cfg, the configuration file used by the MINIX boot monitor. The default values are stored in /etc/boot.cfg.default.
/etc/boot.cfg.local stores any local modifications. These templates obey the syntax of boot.cfg(5). The /etc/boot.cfg.default template
expects the system images to reside in the /boot/minix directory and that /boot/minix_latest points to last image, selected by the default= command. Besides the directory to which points /boot/minix_latest, all the directory entries within /boot/minix are expected to be alternative system releases, and are given additional menu= entries, with the basic parameters $rootdevname and $args. Template menu= entries for inexistant directories, or directories without kernel file, are skipped; the default= option is adjusted to point to the
same relative menu entry.
Within the templates, some variables can be used and will be substituted by update_bootcfg at run time. They are preceded by the dollar
sign. $rootdevname is replaced with the name of the device holding the (current) root file system; $args, which is intended to be at the
end of the menu lines, is replaced by the system environement values.
Finally, the update_bootcfg command updates the root file system.
.SH EXAMPLES
update_bootcfg
.SH FILES
.TP
.I /boot.cfg
Location of the configuration file
.TP
.I /boot/minix/*
Directories with the various releases
.TP
.I /boot/minix_default
Directory with the base release of MINIX, installed at setup(8) time
.TP
.I /boot/minix_latest
Symbolic link to the directory with the latest release, usually taken by default
.TP
.I /etc/boot.cfg.default
Default template
.TP
.I /etc/boot.cfg.local
Locally-defined additional boot commands
.SH BUGS
The previous content of /boot.cfg is lost. Do not change that file directly!
The presence of /boot/minix_latest as a menu= entry is not checked; it is assumed than one or several entries refer to it.
The naming conventions, particularly the use of default, are not consistent.
.SH SEE ALSO
boot.cfg(5)
boot(8), boot.cfg(5), setup(8), sysenv(1)
.SH AUTHOR
Manpage written by Jacob Adams <tookmund@gmail.com>
Manpage written by Jacob Adams <tookmund@gmail.com>.
This manpage borrows liberally from Antoine Leca's manual page.