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AU Payload Generator: allow extracting kernel/rootfs for debugging

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BUG=7427
TEST=verified old style full and delta updates work

Review URL: http://codereview.chromium.org/3582016
This commit is contained in:
Andrew de los Reyes 2010-10-06 16:54:16 -07:00
parent 83935df893
commit db0fa3f9ac
1 changed files with 38 additions and 3 deletions
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41
cros_generate_update_payload
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@ -56,8 +56,12 @@ cleanup() {
extract_partition_to_temp_file() {
local filename="$1"
local partition="$2"
local temp_file=$(mktemp /tmp/generate_update_payload.XXXXXX)
local temp_file="$3"
if [ -z "$temp_file" ]; then
temp_file=$(mktemp /tmp/cros_generate_update_payload.XXXXXX)
echo "$temp_file"
fi
local offset=$(partoffset "${filename}" ${partition}) # 512-byte sectors
local length=$(partsize "${filename}" ${partition}) # 512-byte sectors
local bs=512
@ -71,7 +75,6 @@ extract_partition_to_temp_file() {
warn "partition offset or length not at 2MiB boundary"
fi
dd if="$filename" of="$temp_file" bs=$bs count="$length" skip="$offset"
echo "$temp_file"
}
patch_kernel() {
@ -92,6 +95,25 @@ patch_kernel() {
STATE_LOOP_DEV=""
}
extract_kern_root() {
local bin_file="$1"
local kern_out="$2"
local root_out="$3"
if [ -z "$kern_out" ]; then
die "missing kernel output filename"
fi
if [ -z "$root_out" ]; then
die "missing root output filename"
fi
extract_partition_to_temp_file "$bin_file" 2 "$kern_out"
if [ "$FLAGS_patch_kernel" -eq "$FLAGS_TRUE" ]; then
patch_kernel "$bin_file" "$kern_out"
fi
extract_partition_to_temp_file "$bin_file" 3 "$root_out"
}
DEFINE_string image "" "The image that should be sent to clients."
DEFINE_string src_image "" "Optional: a source image. If specified, this makes\
a delta update."
@ -100,6 +122,8 @@ DEFINE_string output "" "Output file"
DEFINE_boolean patch_kernel "$FLAGS_FALSE" "Whether or not to patch the kernel \
with the patch from the stateful partition (default: false)"
DEFINE_string private_key "" "Path to private key in .pem format."
DEFINE_boolean extract "$FLAGS_FALSE" "If set, extract old/new kernel/rootfs \
to [old|new]_[kern|root].dat. Useful for debugging (default: false)"
# Parse command line
FLAGS "$@" || exit 1
@ -114,6 +138,17 @@ fi
locate_gpt
if [ "$FLAGS_extract" -eq "$FLAGS_TRUE" ]; then
if [ -n "$FLAGS_src_image" ]; then
extract_kern_root "$FLAGS_src_image" old_kern.dat old_root.dat
fi
if [ -n "$FLAGS_image" ]; then
extract_kern_root "$FLAGS_image" new_kern.dat new_root.dat
fi
echo Done extracting kernel/root
exit 0
fi
DELTA=$FLAGS_TRUE
[ -n "$FLAGS_output" ] || die \
"Error: you must specify an output filename with --output FILENAME"