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simplify _kver function

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Tobias Powalowski 2024-07-09 21:04:22 +02:00
parent 7a006fbfe0
commit 22bebd4c19
1 changed files with 7 additions and 19 deletions
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26
usr/lib/archboot/common.sh
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@ -160,26 +160,14 @@ _run_update_environment() {
} }
_kver() { _kver() {
# this is intentionally very loose. only ensure that we're if [[ -f "${1}" ]]; then
# dealing with some sort of string that starts with something # x86_64 default image
# resembling dotted decimal notation. remember that there's no rg --no-heading -Noazm 1 'ABCDEF(.*)\(.*@' -r '$1' ${1} ||
# requirement for CONFIG_LOCALVERSION to be set. # aarch64, works for compressed and uncompressed image
local kver re='^[[:digit:]]+(\.[[:digit:]]+)+' rg --no-heading -Noazm 1 'Linux version ([0-9].*) \(.*@' -r '$1' "${1}" ||
local arch bytes reader # riscv64, rg cannot detect compression without suffix
arch="${_RUNNING_ARCH}" zcat "${1}" | rg -Noazm 1 'Linux version ([0-9].*) \(.*@' -r '$1'
if [[ $arch == @(i?86|x86_64) ]]; then
local -i offset
offset="$(od -An -j0x20E -dN2 "$1")" || return
read -r kver _ < \
<(dd if="$1" bs=1 count=127 skip=$((offset + 0x200)) 2>"${_NO_LOG}")
else
reader='cat'
bytes="$(od -An -t x2 -N2 "$1" | tr -dc '[:alnum:]')"
[[ "$bytes" == '8b1f' ]] && reader='zcat'
read -r _ _ kver _ < <($reader "$1" | rg -m1 -ao 'Linux version .(\.[-[:alnum:]+]+)+')
fi fi
[[ "$kver" =~ $re ]] || return 1
printf '%s' "$kver"
} }
### check architecture ### check architecture