First version

This commit is contained in:
GenZmeY 2021-02-15 22:34:20 +03:00
parent 973818d971
commit da15757dde

99
kf2-ranked-patch Normal file
View File

@ -0,0 +1,99 @@
#!/bin/bash
set -Eeuo pipefail
trap on_error SIGINT SIGTERM ERR
ScriptFullname=$(readlink -e "$0")
ScriptName=$(basename "$0")
TargetFile=""
function show_help ()
{
echo "Usage:"
echo "${ScriptName} FILENAME patch specified kf2 executable"
echo "${ScriptName} -h, --help show help"
echo ""
echo "Dependencies: dd, readelf, hexdump"
}
function on_error ()
{
trap - SIGINT SIGTERM ERR
echo "Process aborted."
restore
}
function backup ()
{
cp -f "$TargetFile" "$TargetFile.orig"
}
function restore ()
{
if [[ -e "$TargetFile.orig" ]]; then
mv -f "$TargetFile.orig" "$TargetFile"
echo "Original executable restored"
fi
}
function real_offset () # $1: offset (hex)
{
local Offset="$1"
local LoadAddr=$(
readelf -l -W "$TargetFile" | \
grep -P 'LOAD\s+0x000000' | \
awk '{ print $3 }' | \
grep -Po '[1-9a-f][0-9a-f]+')
echo $((16#$Offset - 16#$LoadAddr))
}
function target_addr ()
{
echo $(real_offset $(readelf -s -W "$TargetFile" | \
grep -P 'KFGameInfo\w+SetGameUnranked' | \
grep -v 'exec' | \
head -n 1 | \
awk '{ print $2 }' | \
grep -Po '[1-9a-f][0-9a-f]+'))
}
function patched ()
{
local ControlHex=$(
hexdump -ve '1/1 "%.2x"' \
-s $(target_addr) \
-n 1 "$TargetFile")
test "$ControlHex" == "c3"
}
function apply_patch ()
{
printf '\xc3' | \
dd of="$TargetFile" \
bs=1 \
seek=$(target_addr) \
count=1 \
conv=notrunc
echo "Successfully patched!"
}
function main ()
{
if ! [[ -w "$TargetFile" ]]; then
echo "Can't write file. Make sure the file exists and it's read/write accessible."
exit 1
fi
if patched; then
echo "File already patched - skip."
exit 0
fi
backup && apply_patch
}
if [[ $# -eq 0 ]]; then show_help; exit 0; fi
case $1 in
-h|--help ) show_help ; ;;
* ) TargetFile="$1"; main ;;
esac