mirror of
https://github.com/86Box/bios-tools.git
synced 2026-02-21 09:05:33 -07:00
41 lines
1.4 KiB
Bash
41 lines
1.4 KiB
Bash
#!/bin/sh
|
|
# This program is free software; you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License as published by
|
|
# the Free Software Foundation; either version 2 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# This program is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with this program; if not, write to the Free Software
|
|
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
|
|
# MA 02110-1301, USA.
|
|
#
|
|
# Takes a path to a file as first and only argument, removes the first 2048 B
|
|
# from that file and stores the result with the same name plus a '.bin' suffix.
|
|
# Useable to remove the header from UEFI Capsule files to use the resulting
|
|
# binary with flashrom.
|
|
|
|
main () {
|
|
if [ "$#" -lt 1 -o ! -r "$1" ]; then
|
|
echo "Removes the 2048 B header of UEFI Capsule files.\n"\
|
|
"Usage: $0 <FILE.CAP>"
|
|
return 1
|
|
fi
|
|
|
|
capsize=$(wc -c "$1" | cut -f 1 -d ' ')
|
|
binsize=$(($capsize-2048))
|
|
ispowoftwo=$(($binsize & ($binsize-1)))
|
|
if [ $ispowoftwo -ne 0 -o $binsize -eq 0 ]; then
|
|
echo "The size of the resulting file would not be a power of 2 (but $binsize B)."
|
|
return 1
|
|
fi
|
|
|
|
dd bs=2048 skip=1 if="$1" of="$1.bin"
|
|
}
|
|
|
|
main $*
|