diff options
| -rw-r--r-- | PKGBUILD | 2 | ||||
| -rwxr-xr-x | lsinitcpio | 64 |
2 files changed, 53 insertions, 13 deletions
@@ -9,7 +9,7 @@ groups=('base') conflicts=('mkinitcpio') provides=("mkinitcpio=$pkgver") depends=('mkinitcpio-busybox>=1.19.4-2' 'kmod' 'util-linux>=2.21' 'libarchive' 'coreutils' - 'awk' 'bash' 'findutils' 'grep' 'filesystem>=2011.10-1' 'systemd-tools' 'file' 'gzip') + 'awk' 'bash' 'findutils' 'grep' 'filesystem>=2011.10-1' 'systemd-tools' 'gzip') makedepends=('asciidoc' 'git' 'sed') optdepends=('xz: Use lzma or xz compression for the initramfs image' 'bzip2: Use bzip2 compression for the initramfs image' @@ -68,6 +68,57 @@ size_to_human() { }' } +detect_filetype() { + local offt + local kver_validator='^[[:digit:]]+(\.[[:digit:]]+)+' + + case $(hexdump -n 6 -e '"%c"' "$1") in + '070701') + # no compression + return + ;; + $'\xfd7zXZ') + echo 'xz' + return + ;; + esac + + if [[ $(hexdump -n 4 -e '"%c"' "$1") = $'\x89LZO' ]]; then + echo 'lzop' + return + fi + + if [[ $(hexdump -n 2 -e '"%x"' "$1") = '8b1f' ]]; then + echo 'gzip' + return + fi + + if [[ $(hexdump -n 3 -e '"%c"' "$1") == 'BZh' ]]; then + echo 'bzip2' + return + fi + + # lzma detection sucks and there's really no good way to + # do it without reading large portions of the stream. this + # check is good enough for GNU tar, apparently, so it's good + # enough for me. + if [[ $(hexdump -n 3 -e '"%x"' "$1") = '5d' ]]; then + echo 'lzma' + return + fi + + # still nothing? hrmm, maybe the user goofed and it's a kernel + offt=$(hexdump -s 526 -n 2 -e '"%0d"' "$1") + read kver _ < \ + <(dd if="$1" bs=1 count=127 skip=$(( offt + 0x200 )) 2>/dev/null) + if [[ $kver =~ $kver_validator ]]; then + die '%s is a kernel image, not an initramfs image!' "$1" + fi + + # out of ideas, we're done here. + die 'Unexpected file type. Are you sure %s is an initramfs?' "$1" +} + analyze_image() { local -a binaries explicitmod modules foundhooks hooks local kernver ratio columns=$(tput cols) image=$1 @@ -240,18 +291,7 @@ case $(( _optanalyze + _optlistcontents + _optshowconfig )) in esac # read compression type -case $(file -Lb "$_image") in - 'Linux kernel'*) - die '%s is a kernel image, not an initramfs image!' "$_image" ;; - data*|LZMA*) _compress=lzma ;; - gzip*) _compress=gzip ;; - bzip2*) _compress=bzip2 ;; - lzop*) _compress=lzop ;; - XZ*) _compress=xz ;; - 'ASCII cpio'*) : ;; - *) - die 'Unexpected file type. Are you sure this is an initramfs?' "$_image" ;; -esac +_compress=$(detect_filetype "$_image") || exit if (( _optanalyze )); then analyze_image "$_image" |