diff options
| -rwxr-xr-x | lsinitcpio | 20 |
1 files changed, 14 insertions, 6 deletions
@@ -75,7 +75,10 @@ size_to_human() { } detect_filetype() { - case $(hexdump -n 6 -e '"%c"' "$1") in + local bytes + + read -rd '' bytes < <(hexdump -n 6 -e '"%c"' "$1") + case $bytes in '070701') # no compression echo @@ -87,17 +90,20 @@ detect_filetype() { ;; esac - if [[ $(hexdump -n 4 -e '"%c"' "$1") = $'\x89LZO' ]]; then + read -rd '' bytes < <(hexdump -n 4 -e '"%c"' "$1") + if [[ $bytes = $'\x89LZO' ]]; then echo 'lzop' return fi - if [[ $(hexdump -n 2 -e '"%x"' "$1") = '8b1f' ]]; then + read -rd '' bytes < <(hexdump -n 2 -e '"%x"' "$1") + if [[ $bytes = '8b1f' ]]; then echo 'gzip' return fi - case $(hexdump -n 4 -e '"%x"' "$1") in + read -rd '' bytes < <(hexdump -n 4 -e '"%x"' "$1") + case $bytes in 184d2204) error 'Newer lz4 stream format detected! This may not boot!' echo 'lz4' @@ -109,7 +115,8 @@ detect_filetype() { ;; esac - if [[ $(hexdump -n 3 -e '"%c"' "$1") == 'BZh' ]]; then + read -rd '' bytes < <(hexdump -n 3 -e '"%c"' "$1") + if [[ $bytes == 'BZh' ]]; then echo 'bzip2' return fi @@ -118,7 +125,8 @@ detect_filetype() { # 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 + read -rd '' bytes < <(hexdump -n 3 -e '"%x"' "$1") + if [[ $bytes = '5d' ]]; then echo 'lzma' return fi |