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251 lines
8.5 KiB
251 lines
8.5 KiB
#!/bin/bash |
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# |
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# Generator script for a dracut initramfs |
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# Tries to retain some degree of compatibility with the command line |
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# of the various mkinitrd implementations out there |
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# |
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# Copyright 2005-2009 Red Hat, Inc. All rights reserved. |
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# |
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# This program is free software; you can redistribute it and/or modify |
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# it under the terms of the GNU General Public License as published by |
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# the Free Software Foundation; either version 2 of the License, or |
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# (at your option) any later version. |
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# |
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# This program is distributed in the hope that it will be useful, |
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# but WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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# GNU General Public License for more details. |
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# |
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# You should have received a copy of the GNU General Public License |
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# along with this program. If not, see <http://www.gnu.org/licenses/>. |
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# |
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usage() { |
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# 80x25 linebreak here ^ |
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echo "Usage: $0 [OPTION]... <initramfs> <kernel-version> |
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Creates initial ramdisk images for preloading modules |
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-f, --force Overwrite existing initramfs file. |
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-m, --modules [LIST] Specify a space-separated list of dracut modules to |
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call when building the initramfs. Modules are located |
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in /usr/share/dracut/modules.d. |
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-o, --omit [LIST] Omit a space-separated list of dracut modules. |
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-a, --add [LIST] Add a space-separated list of dracut modules. |
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-d, --drivers [LIST] Specify a space-separated list of kernel modules to |
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include in the initramfs. |
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-k, --kmoddir [DIR] Specify the directory, where to look for kernel |
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modules |
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--fwdir [DIR] Specify additional directories, where to look for |
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firmwares, separated by : |
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--kernel-only Only install kernel drivers and firmware files |
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--no-kernel Do not install kernel drivers and firmware files |
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--strip Strip binaries in the initramfs (default) |
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--nostrip Do not strip binaries in the initramfs |
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-h, --help This message |
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--debug Output debug information of the build process |
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-v, --verbose Verbose output during the build process |
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-c, --conf [FILE] Specify configuration file to use. |
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Default: /etc/dracut.conf |
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-l, --local Local mode. Use modules from the current working |
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directory instead of the system-wide installed in |
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/usr/share/dracut/modules.d. |
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Useful when running dracut from a git checkout. |
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-H, --hostonly Host-Only mode: Install only what is needed for |
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booting the local host instead of a generic host. |
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-i, --include [SOURCE] [TARGET] |
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Include the files in the SOURCE directory into the |
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Target directory in the final initramfs. |
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-I, --install [LIST] Install the space separated list of files into the |
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initramfs. |
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" |
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} |
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while (($# > 0)); do |
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case $1 in |
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-f|--force) force=yes;; |
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-m|--modules) dracutmodules_l="$2"; shift;; |
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-o|--omit) omit_dracutmodules_l="$2"; shift;; |
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-a|--add) add_dracutmodules_l="$2"; shift;; |
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-d|--drivers) drivers_l="$2"; shift;; |
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-k|--kmoddir) drivers_dir_l="$2"; shift;; |
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--fwdir) fw_dir_l="$2"; shift;; |
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--kernel-only) kernel_only="yes"; nokernel="no";; |
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--no-kernel) kernel_only="no"; no_kernel="yes";; |
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--strip) do_strip_l="yes";; |
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--nostrip) do_strip_l="no";; |
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-h|--help) usage; exit 1 ;; |
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--debug) debug="yes";; |
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-v|--verbose) beverbose="yes";; |
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-c|--conf) conffile="$2"; shift;; |
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-l|--local) allowlocal="yes" ;; |
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-H|--hostonly) hostonly_l="yes" ;; |
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-i|--include) include_src="$2"; include_target="$3"; shift 2;; |
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-I|--install) install_items="$2"; shift;; |
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-*) printf "\nUnknown option: %s\n\n" "$1" >&2; usage; exit 1;; |
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*) break ;; |
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esac |
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shift |
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done |
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PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:$PATH |
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[[ $debug ]] && { |
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export PS4='${BASH_SOURCE}@${LINENO}(${FUNCNAME[0]}): '; |
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set -x |
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} |
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# if we were not passed a config file, try the default one |
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[[ ! -f $conffile ]] && conffile="/etc/dracut.conf" |
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# source our config file |
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[[ -f $conffile ]] && . "$conffile" |
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# these options override the stuff in the config file |
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[[ $dracutmodules_l ]] && dracutmodules=$dracutmodules_l |
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[[ $omit_dracutmodules_l ]] && omit_dracutmodules=$omit_dracutmodules_l |
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[[ $add_dracutmodules_l ]] && add_dracutmodules="$add_dracutmodules $add_dracutmodules_l" |
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[[ $drivers_l ]] && drivers=$drivers_l |
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[[ $drivers_dir_l ]] && drivers_dir=$drivers_dir_l |
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[[ $fw_dir_l ]] && fw_dir=$fw_dir_l |
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[[ $do_strip_l ]] && do_strip=$do_strip_l |
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[[ $hostonly_l ]] && hostonly=$hostonly_l |
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[[ $dracutbasedir ]] || dracutbasedir=/usr/share/dracut |
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[[ $fw_dir ]] || fw_dir=/lib/firmware |
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[[ $do_strip ]] || do_strip=yes |
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# eliminate IFS hackery when messing with fw_dir |
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fw_dir=${fw_dir//:/ } |
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[[ $hostonly = yes ]] && hostonly="-h" |
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[[ $allowlocal && -f "$(dirname $0)/dracut-functions" ]] && dsrc="$(dirname $0)" || dsrc=$dracutbasedir |
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if [[ -f $dsrc/dracut-functions ]]; then |
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. $dsrc/dracut-functions |
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else |
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echo "Cannot find $dsrc/dracut-functions. Are you running from a git checkout?" |
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echo "Try passing -l as an argument to $0" |
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exit 1 |
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fi |
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dracutfunctions=$dsrc/dracut-functions |
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export dracutfunctions |
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# This is kinda legacy -- eventually it should go away. |
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case $dracutmodules in |
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""|auto) dracutmodules="all" ;; |
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esac |
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[[ $2 ]] && kernel=$2 || kernel=$(uname -r) |
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[[ $1 ]] && outfile=$(readlink -f $1) || outfile="/boot/initrd-$kernel.img" |
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srcmods="/lib/modules/$kernel/" |
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[[ $drivers_dir ]] && srcmods="$drivers_dir" |
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export srcmods |
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if [[ -f $outfile && ! $force ]]; then |
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echo "Will not override existing initramfs ($outfile) without --force" |
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exit 1 |
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fi |
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hookdirs="cmdline pre-udev pre-trigger netroot pre-mount pre-pivot mount emergency" |
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readonly initdir=$(mktemp -d -t initramfs.XXXXXX) |
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trap 'rm -rf "$initdir"' 0 # clean up after ourselves no matter how we die. |
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# Need to be able to have non-root users read stuff (rpcbind etc) |
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chmod 755 "$initdir" |
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export initdir hookdirs dsrc dracutmodules drivers \ |
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fw_dir drivers_dir debug beverbose no_kernel kernel_only |
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if [[ $kernel_only != yes ]]; then |
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# Create some directory structure first |
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for d in bin sbin usr/bin usr/sbin usr/lib etc proc sys sysroot tmp dev/pts var/run; do |
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mkdir -p "$initdir/$d"; |
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done |
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fi |
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# check all our modules to see if they should be sourced. |
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# This builds a list of modules that we will install next. |
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check_modules |
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#source our modules. |
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for moddir in "$dsrc/modules.d"/[0-9][0-9]*; do |
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mod=${moddir##*/}; mod=${mod#[0-9][0-9]} |
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if strstr "$mods_to_load" " $mod "; then |
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if [[ $kernel_only = yes ]]; then |
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[[ -x $moddir/installkernel ]] && . "$moddir/installkernel" |
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else |
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. "$moddir/install" |
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if [[ $no_kernel != yes && -x $moddir/installkernel ]]; then |
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. "$moddir/installkernel" |
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fi |
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fi |
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mods_to_load=${mods_to_load// $mod /} |
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fi |
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done |
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unset moddir |
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echo $mods_to_load |
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## final stuff that has to happen |
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# generate module dependencies for the initrd |
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if [[ -d $initdir/lib/modules/$kernel ]]; then |
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if ! depmod -a -b "$initdir" $kernel; then |
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echo "\"depmod -a $kernel\" failed." |
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exit 1 |
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fi |
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fi |
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# make sure that library links are correct and up to date |
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ldconfig -n -r "$initdir" /lib* /usr/lib* |
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if [[ $include_src && $include_target ]]; then |
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mkdir -p "$initdir$include_target" |
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cp -a -t "$initdir$include_target" "$include_src"/* |
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fi |
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for item in $install_items; do |
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dracut_install "$item" |
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done |
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unset item |
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[[ $beverbose = yes ]] && (du -c "$initdir" | sort -n) |
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# strip binaries |
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if [[ $do_strip = yes ]] ; then |
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for p in strip objdump sed grep find; do |
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if ! which $p >/dev/null 2>&1; then |
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derror "Could not find '$p'. You should run $0 with '--nostrip'." |
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do_strip=no |
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fi |
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done |
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fi |
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if [[ $do_strip = yes ]] ; then |
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for f in $(find "$initdir" -type f \( -perm -0100 -or -perm -0010 -or -perm -0001 \) -exec file {} \; | |
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grep -v ' shared object,' | |
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sed -n -e 's/^\(.*\):[ ]*ELF.*, not stripped/\1/p'); do |
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dinfo "Stripping $f" |
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strip -g "$f" || : |
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# |
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# FIXME: only strip -g for now |
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# |
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#strip -g --strip-unneeded "$f" || : |
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#note="-R .note" |
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#if objdump -h $f | grep '^[ ]*[0-9]*[ ]*.note[ ]' -A 1 | \ |
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# grep -q ALLOC; then |
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# note= |
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#fi |
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#strip -R .comment $note "$f" || : |
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done |
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fi |
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( cd "$initdir"; find . |cpio -R 0:0 -H newc -o |gzip -9 > "$outfile"; ) |
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[[ $beverbose = yes ]] && ls -lh "$outfile" |
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exit 0 |
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