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dracut i18n module ------------------ INDEX 0. Introduction 1. Hostonly vs Generic 2. Configuration 2.1. Variables 2.2. Setting up mappings 2.3. Additional settings 3. Kernel parameters ~ 0. Introduction i18n module provides internationalization for initramfs at runtime. It is intended to be generic across different GNU/Linux distributions. i18n and keyboard settings are stored in different files among distributions. To deal with it avoiding hardcoding those differences in the installation script we handle it by mappings between variables used by dracut and the ones in the system. Package maintainer is expected to create those for his/her distribution and it's appreciated to share it with us, so we can include it in source package. 1. Hostonly vs Generic If you invoke dracut with '-H' option, i18n module install script will gather variables values from your configuration files using mappings provided in "/etc/dracut.conf.d/<foo>.conf". Those variables will be put in "etc/vconsole.conf" and "etc/locale.conf" files inside initramfs image. Next it will install only declared font, keymaps and so. When building generic image (dracut without '-H' option), install script copies all content of directories: consolefonts, consoletrans, unimaps and keymaps to image. Take into account that's about 4 MiB. 2. Configuration 2.1. Variables The following variables are used by i18n install script and at initramfs runtime: KEYMAP - keyboard translation table loaded by loadkeys KEYTABLE - base name for keyboard translation table; if UNICODE is true, Unicode version will be loaded. Overrides KEYMAP. EXT_KEYMAPS - list of extra keymaps to bo loaded (sep. by space) UNICODE - boolean, indicating UTF-8 mode FONT - console font FONT_MAP - see description of '-m' parameter in setfont manual FONT_UNIMAP - see description of '-u' parameter in setfont manual The following are appended to EXT_KEYMAPS only during build time: UNIKEYMAP GRP_TOGGLE They were used in 10redhat-i18n module, but not sure of its purpose. I'm leaving it in case... The following are taken from the environment: LANG LC_ALL If UNICODE variable is not provided, script indicates if UTF-8 should be used on the basis of LANG value (if it ends with ".utf8" or similar). 2.2. Setting up mappings Mappings between variables listed in 2.1. and the ones spread around your system are set up in /etc/dracut.conf.d/<foo>.conf. You need to assign mappings to i18n_vars. Here's an example: i18n_vars="/etc/conf.d/keymaps:KEYMAP,EXTENDED_KEYMAPS-EXT_KEYMAPS /etc/conf.d/consolefont:CONSOLEFONT-FONT,CONSOLETRANSLATION-FONT_MAP /etc/rc.conf:UNICODE" First we've got name of file in host file system tree. After colon there's mapping: <from>-<to>. If both variables have the same name you can enter just a single, but it's important to specify it! The module will source only variables you've listed. Below there's detailed description in BNF: <list> ::= <element> | <element> " " <list> <element> ::= <conf-file-name> ":" <map-list> <map-list> ::= <mapping> | <mapping> "," <map-list> <mapping> ::= <src-var> "-" <dst-var> | <src-var> We assume no whitespace are allowed between symbols. <conf-file-name> is a file holding <src-var> in your system. <src-var> is a variable holding value of meaning the same as <dst-var>. <dst-var> is a variable which will be set up inside initramfs. If <dst-var> has the same name as <src-var> we can omit <dst-var>. Example: /etc/conf.d/keymaps:KEYMAP,extended_keymaps-EXT_KEYMAPS <list> = /etc/conf.d/keymaps:KEYMAP,extended_keymaps-EXT_KEYMAPS <element> = /etc/conf.d/keymaps:KEYMAP,extended_keymaps-EXT_KEYMAPS <conf-file-name> = /etc/conf.d/keymaps <map-list> = KEYMAP,extended_keymaps-EXT_KEYMAPS <mapping> = KEYMAP <src-var> = KEYMAP <mapping> = extended_keymaps-EXT_KEYMAPS <src-var> = extended_keymaps <dst-var> = EXT_KEYMAPS 2.3. Additional settings If you encounter following error message: "Directories consolefonts, consoletrans, keymaps, unimaps not found.", you can provide path where those directories lie in your system by setting kbddir in configuration file (the same where you put mappings). 3. Kernel parameters If you create generic initramfs you can set up i18n by kernel parameters using variables listed in 2.1. (except of UNIKEYMAP and GRP_TOGGLE) The recommended minimum is: FONT and KEYMAP.
