Use file_contexts.bin from other build to regenerate images.
The old process_file_contexts_bin function did not properly generate a usable
file_contexts.bin to regenerate images, so instead use the file_contexts.bin
from the other partial target files package. When combining any one of several
other partial target files packages with a single system partial target files
package, this file will properly apply contexts as long as the same source is
used for the system partial target files.
Test: Verify that file contexts are properlty applied to vendor image.
Bug: 131584454
Change-Id: I16f8cc3b7f2eb7f09746f0ddcb2c1daf3fd19da6
diff --git a/tools/releasetools/merge_target_files.py b/tools/releasetools/merge_target_files.py
index 689e095..f0d55d7 100755
--- a/tools/releasetools/merge_target_files.py
+++ b/tools/releasetools/merge_target_files.py
@@ -160,6 +160,7 @@
default_other_item_list = [
'META/boot_filesystem_config.txt',
+ 'META/file_contexts.bin',
'META/otakeys.txt',
'META/releasetools.py',
'META/vendor_filesystem_config.txt',
@@ -442,81 +443,7 @@
output.write('{}={}\n'.format(key, merged_info_dict[key]))
-def process_file_contexts_bin(temp_dir, output_target_files_temp_dir):
- """Perform special processing for META/file_contexts.bin.
-
- This function combines plat_file_contexts and vendor_file_contexts, which are
- expected to already be extracted in temp_dir, to produce a merged
- file_contexts.bin that will land in temp_dir at META/file_contexts.bin.
-
- Args:
- temp_dir: The name of a scratch directory that this function can use for
- intermediate files generated during processing.
- output_target_files_temp_dir: The name of the working directory that must
- already contain plat_file_contexts and vendor_file_contexts (in the
- appropriate sub directories), and to which META/file_contexts.bin will be
- written.
- """
-
- # To create a merged file_contexts.bin file, we use the system and vendor
- # file contexts files as input, the m4 tool to combine them, the sorting tool
- # to sort, and finally the sefcontext_compile tool to generate the final
- # output. We currently omit a checkfc step since the files had been checked
- # as part of the build.
-
- # The m4 step concatenates the two input files contexts files. Since m4
- # writes to stdout, we receive that into an array of bytes, and then write it
- # to a file.
-
- # Collect the file contexts that we're going to combine from SYSTEM, VENDOR,
- # PRODUCT, and ODM. We require SYSTEM and VENDOR, but others are optional.
-
- file_contexts_list = []
-
- for partition in ['SYSTEM', 'VENDOR', 'PRODUCT', 'ODM']:
- prefix = 'plat' if partition == 'SYSTEM' else partition.lower()
-
- file_contexts = os.path.join(output_target_files_temp_dir, partition, 'etc',
- 'selinux', prefix + '_file_contexts')
-
- mandatory = partition in ['SYSTEM', 'VENDOR']
-
- if mandatory or os.path.isfile(file_contexts):
- file_contexts_list.append(file_contexts)
- else:
- logger.warning('file not found: %s', file_contexts)
-
- command = ['m4', '--fatal-warnings', '-s'] + file_contexts_list
-
- merged_content = common.RunAndCheckOutput(command, verbose=False)
-
- merged_file_contexts_txt = os.path.join(temp_dir, 'merged_file_contexts.txt')
-
- with open(merged_file_contexts_txt, 'wb') as f:
- f.write(merged_content)
-
- # The sort step sorts the concatenated file.
-
- sorted_file_contexts_txt = os.path.join(temp_dir, 'sorted_file_contexts.txt')
- command = ['fc_sort', merged_file_contexts_txt, sorted_file_contexts_txt]
- common.RunAndWait(command, verbose=True)
-
- # Finally, the compile step creates the final META/file_contexts.bin.
-
- file_contexts_bin = os.path.join(output_target_files_temp_dir, 'META',
- 'file_contexts.bin')
-
- command = [
- 'sefcontext_compile',
- '-o',
- file_contexts_bin,
- sorted_file_contexts_txt,
- ]
-
- common.RunAndWait(command, verbose=True)
-
-
-def process_special_cases(temp_dir, system_target_files_temp_dir,
+def process_special_cases(system_target_files_temp_dir,
other_target_files_temp_dir,
output_target_files_temp_dir, system_misc_info_keys,
rebuild_recovery):
@@ -526,8 +453,6 @@
processing. This function performs all that special-case processing.
Args:
- temp_dir: The name of a scratch directory that this function can use for
- intermediate files generated during processing.
system_target_files_temp_dir: The name of a directory containing the special
items extracted from the system target files package.
other_target_files_temp_dir: The name of a directory containing the special
@@ -557,10 +482,6 @@
output_target_files_temp_dir=output_target_files_temp_dir,
system_misc_info_keys=system_misc_info_keys)
- process_file_contexts_bin(
- temp_dir=temp_dir,
- output_target_files_temp_dir=output_target_files_temp_dir)
-
def merge_target_files(temp_dir, system_target_files, system_item_list,
system_misc_info_keys, other_target_files,
@@ -655,7 +576,6 @@
# files package are in place.
process_special_cases(
- temp_dir=temp_dir,
system_target_files_temp_dir=system_target_files_temp_dir,
other_target_files_temp_dir=other_target_files_temp_dir,
output_target_files_temp_dir=output_target_files_temp_dir,