mirror of
https://gitlab.archlinux.org/tpowa/archboot.git
synced 2024-09-20 03:50:37 +02:00
move in all needed functions to cpio.sh
This commit is contained in:
Tobias Powalowski
parent
558256d239
commit
ed0413ad07
2 changed files with 468 additions and 7 deletions
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@ -11,8 +11,7 @@ shopt -s extglob
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### globals within mkinitcpio, but not intended to be used by hooks
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# needed files/directories
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_f_functions=/usr/lib/initcpio/functions
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_f_functions_overwrite=/usr/lib/archboot/cpio.sh
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_f_functions=/usr/lib/archboot/cpio.sh
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_f_config=
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_d_hooks=/lib/initcpio/hooks
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_d_install=/lib/initcpio/install
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@ -176,7 +175,6 @@ preload_builtin_modules() {
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# shellcheck source=functions
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. "$_f_functions"
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. "$_f_functions_overwrite"
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_opt_short='c:d:g:hk:'
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_opt_long=('config:' 'generate:' 'help'
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@ -278,9 +276,6 @@ preload_builtin_modules
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map run_build_hook "${_hooks[@]}" || (( ++_builderrors ))
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# process config file
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parse_config "$_f_config"
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install_modules "${!_modpaths[@]}"
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# this is simply a nice-to-have -- it doesn't matter if it fails.
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@ -1,7 +1,308 @@
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#!/usr/bin/env bash
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# SPDX-License-Identifier: GPL-2.0-only
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# simplified, stripped down, optimized for size and speed
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# Arch Linux mkinitcpio - modular tool for building an initramfs images
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# created by Tobias Powalowski <tpowa@archlinux.org>
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### overwriting mkinitcpio functions
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parseopts() {
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local opt='' optarg='' i='' shortopts="$1"
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local -a longopts=() unused_argv=()
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shift
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while [[ -n "$1" && "$1" != '--' ]]; do
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longopts+=("$1")
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shift
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done
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shift
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longoptmatch() {
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local o longmatch=()
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for o in "${longopts[@]}"; do
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if [[ "${o%:}" == "$1" ]]; then
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longmatch=("$o")
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break
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fi
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[[ "${o%:}" == "$1"* ]] && longmatch+=("$o")
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done
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case "${#longmatch[*]}" in
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1)
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# success, override with opt and return arg req (0 == none, 1 == required)
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opt="${longmatch%:}"
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if [[ "${longmatch[*]}" == *: ]]; then
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return 1
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else
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return 0
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fi ;;
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0)
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# fail, no match found
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return 255 ;;
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*)
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# fail, ambiguous match
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printf "%s: option '%s' is ambiguous; possibilities:%s\n" "${0##*/}" \
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"--$1" "$(printf " '%s'" "${longmatch[@]%:}")"
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return 254 ;;
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esac
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}
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while (( $# )); do
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case "$1" in
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--) # explicit end of options
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shift
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break
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;;
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-[!-]*) # short option
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for (( i = 1; i < ${#1}; i++ )); do
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opt=${1:i:1}
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# option doesn't exist
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if [[ $shortopts != *$opt* ]]; then
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printf "%s: invalid option -- '%s'\n" "${0##*/}" "$opt"
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OPTRET=(--)
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return 1
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fi
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OPTRET+=("-$opt")
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# option requires optarg
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if [[ "$shortopts" == *"${opt}:"* ]]; then
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# if we're not at the end of the option chunk, the rest is the optarg
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if (( i < ${#1} - 1 )); then
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OPTRET+=("${1:i+1}")
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break
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# if we're at the end, grab the the next positional, if it exists
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elif (( i == ${#1} - 1 )) && [[ -n "$2" ]]; then
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OPTRET+=("$2")
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shift
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break
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# parse failure
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else
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printf "%s: option '%s' requires an argument\n" "${0##*/}" "-$opt"
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OPTRET=(--)
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return 1
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fi
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fi
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done
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;;
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--?*=*|--?*) # long option
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IFS='=' read -r opt optarg <<< "${1#--}"
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longoptmatch "$opt"
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case $? in
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0)
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if [[ -n "$optarg" ]]; then
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printf "%s: option '--%s' doesn't allow an argument\n" "${0##*/}" "$opt"
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OPTRET=(--)
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return 1
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else
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OPTRET+=("--$opt")
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fi
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;;
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1)
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# --longopt=optarg
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if [[ -n "$optarg" ]]; then
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OPTRET+=("--$opt" "$optarg")
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# --longopt optarg
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elif [[ -n "$2" ]]; then
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OPTRET+=("--$opt" "$2" )
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shift
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else
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printf "%s: option '--%s' requires an argument\n" "${0##*/}" "$opt"
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OPTRET=(--)
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return 1
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fi
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;;
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254)
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# ambiguous option -- error was reported for us by longoptmatch()
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OPTRET=(--)
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return 1
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;;
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255)
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# parse failure
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printf "%s: unrecognized option '%s'\n" "${0##*/}" "--$opt"
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OPTRET=(--)
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return 1
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;;
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esac
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;;
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*) # non-option arg encountered, add it as a parameter
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unused_argv+=("$1")
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;;
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esac
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shift
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done
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# add end-of-opt terminator and any leftover positional parameters
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OPTRET+=('--' "${unused_argv[@]}" "$@")
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unset longoptmatch
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return 0
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}
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kver_x86() {
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local kver
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local -i offset
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# scrape the version out of the kernel image. locate the offset
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# to the version string by reading 2 bytes out of image at at
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# address 0x20E. this leads us to a string of, at most, 128 bytes.
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# read the first word from this string as the kernel version.
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offset="$(od -An -j0x20E -dN2 "$1")" || return
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read -r kver _ < \
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<(dd if="$1" bs=1 count=127 skip=$((offset + 0x200)) 2>/dev/null)
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printf '%s' "$kver"
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}
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detect_compression() {
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local bytes
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bytes="$(od -An -t x1 -N6 "$1" | tr -dc '[:alnum:]')"
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case "$bytes" in
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'fd377a585a00')
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echo 'xz'
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return
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;;
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esac
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bytes="$(od -An -t x1 -N4 "$1" | tr -dc '[:alnum:]')"
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if [[ "$bytes" == '894c5a4f' ]]; then
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echo 'lzop'
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return
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fi
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bytes="$(od -An -t x2 -N2 "$1" | tr -dc '[:alnum:]')"
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if [[ "$bytes" == '8b1f' ]]; then
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echo 'gzip'
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return
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fi
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bytes="$(od -An -t x4 -N4 "$1" | tr -dc '[:alnum:]')"
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case "$bytes" in
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'184d2204')
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error 'Newer lz4 stream format detected! This may not boot!'
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echo 'lz4'
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return
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;;
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'184c2102')
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echo 'lz4 -l'
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return
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;;
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'fd2fb528')
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echo 'zstd'
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return
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;;
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esac
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bytes="$(od -An -c -N3 "$1" | tr -dc '[:alnum:]')"
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if [[ "$bytes" == 'BZh' ]]; then
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echo 'bzip2'
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return
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fi
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# lzma detection sucks and there's really no good way to
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# do it without reading large portions of the stream. this
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# check is good enough for GNU tar, apparently, so it's good
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# enough for me.
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bytes="$(od -An -t x1 -N3 "$1" | tr -dc '[:alnum:]')"
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if [[ "$bytes" == '5d0000' ]]; then
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echo 'lzma'
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return
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fi
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# out of ideas, assuming uncompressed
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}
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kver_generic() {
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# For unknown architectures, we can try to grep the uncompressed or gzipped
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# image for the boot banner.
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# This should work at least for ARM when run on /boot/Image, or RISC-V on
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# gzipped /boot/vmlinuz-linuz. On other architectures it may be worth trying
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# rather than bailing, and inform the user if none was found.
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# Loosely grep for `linux_banner`:
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# https://elixir.bootlin.com/linux/v5.7.2/source/init/version.c#L46
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local kver='' reader='cat'
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[[ "$(detect_compression "$1")" == 'gzip' ]] && reader='zcat'
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read -r _ _ kver _ < <($reader "$1" | grep -m1 -aoE 'Linux version .(\.[-[:alnum:]+]+)+')
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printf '%s' "$kver"
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}
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kver() {
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# this is intentionally very loose. only ensure that we're
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# dealing with some sort of string that starts with something
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# resembling dotted decimal notation. remember that there's no
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# requirement for CONFIG_LOCALVERSION to be set.
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local kver re='^[[:digit:]]+(\.[[:digit:]]+)+'
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local arch
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arch="$(uname -m)"
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if [[ $arch == @(i?86|x86_64) ]]; then
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kver="$(kver_x86 "$1")"
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else
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kver="$(kver_generic "$1")"
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fi
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[[ "$kver" =~ $re ]] || return 1
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printf '%s' "$kver"
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}
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msg() {
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local mesg="$1"; shift
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# shellcheck disable=SC2059
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printf "$_color_green==>$_color_none $_color_bold$mesg$_color_none\n" "$@" >&1
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}
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msg2() {
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local mesg="$1"; shift
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# shellcheck disable=SC2059
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printf " $_color_blue->$_color_none $_color_bold$mesg$_color_none\n" "$@" >&1
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}
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warning() {
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local mesg="$1"; shift
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# shellcheck disable=SC2059
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printf "$_color_yellow==> WARNING:$_color_none $_color_bold$mesg$_color_none\n" "$@" >&2
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}
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error() {
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local mesg="$1"; shift
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# shellcheck disable=SC2059
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printf "$_color_red==> ERROR:$_color_none $_color_bold$mesg$_color_none\n" "$@" >&2
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return 1
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}
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die() {
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error "$@"
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cleanup 1
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}
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map() {
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local r=0
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for _ in "${@:2}"; do
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# shellcheck disable=SC1105,SC2210,SC2035
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"$1" "$_" || (( $# > 255 ? r=1 : ++r ))
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done
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return "$r"
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}
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arrayize_config() {
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set -f
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[[ ${MODULES@a} != *a* ]] && IFS=' ' read -r -a MODULES <<< "$MODULES"
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[[ ${BINARIES@a} != *a* ]] && IFS=' ' read -r -a BINARIES <<< "$BINARIES"
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[[ ${FILES@a} != *a* ]] && IFS=' ' read -r -a FILES <<< "$FILES"
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[[ ${HOOKS@a} != *a* ]] && IFS=' ' read -r -a HOOKS <<< "$HOOKS"
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[[ ${COMPRESSION_OPTIONS@a} != *a* ]] && IFS=' ' read -r -a COMPRESSION_OPTIONS <<< "$COMPRESSION_OPTIONS"
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set +f
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}
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modprobe() {
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# _optmoduleroot is assigned in mkinitcpio
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# shellcheck disable=SC2154
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command modprobe -d "$_optmoduleroot" -S "$KERNELVERSION" "$@"
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}
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add_firmware() {
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# add a firmware file to the image.
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@ -204,6 +505,171 @@ add_binary() {
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return 0
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}
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parse_config() {
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# parse key global variables set by the config file.
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map add_module "${MODULES[@]}"
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map add_binary "${BINARIES[@]}"
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map add_file "${FILES[@]}"
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tee "$BUILDROOT/buildconfig" < "$1" | {
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# When MODULES is not an array (but instead implicitly converted at
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# startup), sourcing the config causes the string value of MODULES
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# to be assigned as MODULES[0]. Avoid this by explicitly unsetting
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# MODULES before re-sourcing the config.
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unset MODULES
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# shellcheck disable=SC1091
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. /dev/stdin
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# arrayize MODULES if necessary.
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[[ ${MODULES@a} != *a* ]] && read -ra MODULES <<<"${MODULES//-/_}"
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for mod in "${MODULES[@]%\?}"; do
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mod="${mod//-/_}"
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# only add real modules (2 == builtin)
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(( _addedmodules["$mod"] == 1 )) && add+=("$mod")
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done
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(( ${#add[*]} )) && printf 'MODULES="%s"\n' "${add[*]}"
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printf '%s="%s"\n' \
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'EARLYHOOKS' "${_runhooks['early']# }" \
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'HOOKS' "${_runhooks['hooks']# }" \
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'LATEHOOKS' "${_runhooks['late']# }" \
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'CLEANUPHOOKS' "${_runhooks['cleanup']% }"
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} >"$BUILDROOT/config"
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}
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initialize_buildroot() {
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# creates a temporary directory for the buildroot and initialize it with a
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# basic set of necessary directories and symlinks
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local workdir='' kernver="$1" arch buildroot osreleasefile
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arch="$(uname -m)"
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if ! workdir="$(mktemp -d --tmpdir mkinitcpio.XXXXXX)"; then
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error 'Failed to create temporary working directory in %s' "${TMPDIR:-/tmp}"
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return 1
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fi
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buildroot="${2:-$workdir/root}"
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if [[ ! -w "${2:-$workdir}" ]]; then
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error 'Unable to write to build root: %s' "$buildroot"
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return 1
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fi
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# base directory structure
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install -dm755 "$buildroot"/{new_root,proc,sys,dev,run,tmp,var,etc,usr/{local{,/bin,/sbin,/lib},lib,bin}}
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ln -s "usr/lib" "$buildroot/lib"
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ln -s "bin" "$buildroot/usr/sbin"
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ln -s "usr/bin" "$buildroot/bin"
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ln -s "usr/bin" "$buildroot/sbin"
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ln -s "/run" "$buildroot/var/run"
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case "$arch" in
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x86_64)
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ln -s "lib" "$buildroot/usr/lib64"
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ln -s "usr/lib" "$buildroot/lib64"
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;;
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esac
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# mkinitcpio version stamp
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# shellcheck disable=SC2154
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printf '%s' "$version" >"$buildroot/VERSION"
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# kernel module dir
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[[ "$kernver" != 'none' ]] && install -dm755 "$buildroot/usr/lib/modules/$kernver/kernel"
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# mount tables
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ln -s ../proc/self/mounts "$buildroot/etc/mtab"
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: >"$buildroot/etc/fstab"
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# add os-release and initrd-release for systemd
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if [[ -e /etc/os-release ]]; then
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if [[ -L /etc/os-release ]]; then
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osreleasefile="$(realpath -- /etc/os-release)"
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install -Dm0644 "$osreleasefile" "${buildroot}${osreleasefile}"
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cp -adT /etc/os-release "${buildroot}/etc/os-release"
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cp -adT /etc/os-release "${buildroot}/etc/initrd-release"
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else
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install -Dm0644 /etc/os-release "${buildroot}/etc/os-release"
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ln -sT os-release "${buildroot}/etc/initrd-release"
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fi
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else
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: >"$buildroot/etc/initrd-release"
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fi
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# add a blank ld.so.conf to keep ldconfig happy
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: >"$buildroot/etc/ld.so.conf"
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printf '%s' "$workdir"
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}
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run_build_hook() {
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local hook="$1" script='' resolved=''
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# shellcheck disable=SC2034
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local MODULES=() BINARIES=() FILES=() SCRIPT=''
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# find script in install dirs
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# _d_install is assigned in mkinitcpio
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# shellcheck disable=SC2154
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if ! script="$(PATH="$_d_install" type -P "$hook")"; then
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error "Hook '$hook' cannot be found"
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return 1
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fi
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# check for deprecation
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if resolved="$(readlink -e "$script")" && [[ "${script##*/}" != "${resolved##*/}" ]]; then
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warning "Hook '%s' is deprecated. Replace it with '%s' in your config" \
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"${script##*/}" "${resolved##*/}"
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script="$resolved"
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fi
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# source
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unset -f build
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# shellcheck disable=SC1090
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if ! . "$script"; then
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error 'Failed to read %s' "$script"
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return 1
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fi
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if ! declare -f build >/dev/null; then
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error "Hook '%s' has no build function" "${script}"
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return 1
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fi
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# run
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if (( _optquiet )); then
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msg2 "Running build hook: [%s]" "${script##*/}"
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else
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||||
msg2 "Running build hook: [%s]" "$script"
|
||||
fi
|
||||
build
|
||||
|
||||
# if we made it this far, return successfully. Hooks can
|
||||
# do their own error catching if it's severe enough, and
|
||||
# we already capture errors from the add_* functions.
|
||||
return 0
|
||||
}
|
||||
|
||||
try_enable_color() {
|
||||
local colors
|
||||
|
||||
if ! colors="$(tput colors 2>/dev/null)"; then
|
||||
warning "Failed to enable color. Check your TERM environment variable"
|
||||
return
|
||||
fi
|
||||
|
||||
if (( colors > 0 )) && tput setaf 0 &>/dev/null; then
|
||||
_color_none="$(tput sgr0)"
|
||||
_color_bold="$(tput bold)"
|
||||
_color_blue="$_color_bold$(tput setaf 4)"
|
||||
_color_green="$_color_bold$(tput setaf 2)"
|
||||
_color_red="$_color_bold$(tput setaf 1)"
|
||||
_color_yellow="$_color_bold$(tput setaf 3)"
|
||||
fi
|
||||
}
|
||||
|
||||
install_modules() {
|
||||
|
||||
command tar --hard-dereference -C / -cpf - "$@" | tar -C "${BUILDROOT}" -xpf -
|
||||
|
|
|
|||
Loading…
Reference in a new issue