vold creates some directories for storing encryption keys if they don't
already exist, potentially including parent directories:
/metadata/vold/metadata_encryption
/data/misc/vold/volume_keys/$volume_uuid
/data/misc_de/$user/vold/volume_keys/$volume_uuid
/data/misc_ce/$user/vold/volume_keys/$volume_uuid
Currently fs_mkdirs() is used for this. However, fs_mkdirs() doesn't
include the fsync()s of the parent directories that are needed to ensure
that the new directories are persisted to disk right away -- which is
important for encryption keys.
Add a utility function MkdirsSync() which does what is needed, and make
the appropriate places call it.
Test: Booted and checked log for "Created directory" message.
Also ran 'atest vold_tests' to run the new unit test.
Change-Id: Ie9917b616433080139b8db3fd6877203ee6faf77
Moves away from crufty char* operations to std::string utility
methods, including android::base methods for splitting/parsing.
Rewrite of how Process handles scanning procfs for filesystem
references; now uses fts(3) for more sane traversal.
Replace sscanf() with new FindValue() method, also has unit tests.
Remove some unused methods. Switch almost everyone over to using
modern logging library.
Test: cts-tradefed run commandAndExit cts-dev -m CtsOsTestCases -t android.os.storage.cts.StorageManagerTest
Test: cts-tradefed run commandAndExit cts-dev --abi armeabi-v7a -m CtsAppSecurityHostTestCases -t android.appsecurity.cts.AdoptableHostTest
Bug: 67041047
Change-Id: I70dc512f21459d1e25b187f24289002b2c7bc7af
