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linux: ensure bytes are valid before patching

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We use sed to replace original bytes by patched ones, but unfortunately
sed doesn't report any errors when this substitution fails.

Now, before actually running sed, we check if these bytes that are soon
to be replaced, actually exist in the driver file.
This commit is contained in:
guihkx
2023-06-26 19:18:06 -03:00
parent 100af892c3
commit 84e433fbbe
2 changed files with 30 additions and 0 deletions
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15
patch-fbc.sh
View File

@@ -381,6 +381,20 @@ patch_common () {
} }
ensure_bytes_are_valid () {
driver_file="$driver_dir/$object.$driver_version"
original_bytes=$(awk -F / '$2 { print $2 }' <<< "$patch")
patched_bytes=$(awk -F / '$3 { print $3 }' <<< "$patch")
if LC_ALL=C grep -qaP "$original_bytes" "$driver_file"; then
return 0 # file is ready to be patched
fi
if LC_ALL=C grep -qaP "$patched_bytes" "$driver_file"; then
return 0 # file is likely patched already
fi
echo "Error: Could not find bytes '$original_bytes' to patch in '$driver_file'."
exit 1
}
rollback () { rollback () {
patch_common patch_common
if [[ -f "$backup_path/$object.$driver_version$backup_suffix" ]]; then if [[ -f "$backup_path/$object.$driver_version$backup_suffix" ]]; then
@@ -395,6 +409,7 @@ rollback () {
patch () { patch () {
patch_common patch_common
ensure_bytes_are_valid
if [[ -f "$backup_path/$object.$driver_version$backup_suffix" ]]; then if [[ -f "$backup_path/$object.$driver_version$backup_suffix" ]]; then
bkp_hash="$(sha1sum "$backup_path/$object.$driver_version$backup_suffix" | cut -f1 -d\ )" bkp_hash="$(sha1sum "$backup_path/$object.$driver_version$backup_suffix" | cut -f1 -d\ )"
drv_hash="$(sha1sum "$driver_dir/$object.$driver_version" | cut -f1 -d\ )" drv_hash="$(sha1sum "$driver_dir/$object.$driver_version" | cut -f1 -d\ )"

15
patch.sh
View File

@@ -457,6 +457,20 @@ patch_common () {
} }
ensure_bytes_are_valid () {
driver_file="$driver_dir/$object.$driver_version"
original_bytes=$(awk -F / '$2 { print $2 }' <<< "$patch")
patched_bytes=$(awk -F / '$3 { print $3 }' <<< "$patch")
if LC_ALL=C grep -qaP "$original_bytes" "$driver_file"; then
return 0 # file is ready to be patched
fi
if LC_ALL=C grep -qaP "$patched_bytes" "$driver_file"; then
return 0 # file is likely patched already
fi
echo "Error: Could not find bytes '$original_bytes' to patch in '$driver_file'."
exit 1
}
rollback () { rollback () {
patch_common patch_common
if [[ -f "$backup_path/$object.$driver_version$backup_suffix" ]]; then if [[ -f "$backup_path/$object.$driver_version$backup_suffix" ]]; then
@@ -471,6 +485,7 @@ rollback () {
patch () { patch () {
patch_common patch_common
ensure_bytes_are_valid
if [[ -f "$backup_path/$object.$driver_version$backup_suffix" ]]; then if [[ -f "$backup_path/$object.$driver_version$backup_suffix" ]]; then
bkp_hash="$(sha1sum "$backup_path/$object.$driver_version$backup_suffix" | cut -f1 -d\ )" bkp_hash="$(sha1sum "$backup_path/$object.$driver_version$backup_suffix" | cut -f1 -d\ )"
drv_hash="$(sha1sum "$driver_dir/$object.$driver_version" | cut -f1 -d\ )" drv_hash="$(sha1sum "$driver_dir/$object.$driver_version" | cut -f1 -d\ )"