diff options
Diffstat (limited to 'cmds/idmap/create.cpp')
| -rw-r--r-- | cmds/idmap/create.cpp | 233 |
1 files changed, 0 insertions, 233 deletions
diff --git a/cmds/idmap/create.cpp b/cmds/idmap/create.cpp deleted file mode 100644 index f415f8f5dd75..000000000000 --- a/cmds/idmap/create.cpp +++ /dev/null @@ -1,233 +0,0 @@ -#include "idmap.h" - -#include <memory> -#include <androidfw/AssetManager.h> -#include <androidfw/ResourceTypes.h> -#include <androidfw/ZipFileRO.h> -#include <utils/String8.h> - -#include <fcntl.h> -#include <sys/file.h> -#include <sys/stat.h> - -using namespace android; - -namespace { - int get_zip_entry_crc(const char *zip_path, const char *entry_name, uint32_t *crc) - { - std::unique_ptr<ZipFileRO> zip(ZipFileRO::open(zip_path)); - if (zip.get() == NULL) { - return -1; - } - ZipEntryRO entry = zip->findEntryByName(entry_name); - if (entry == NULL) { - return -1; - } - if (!zip->getEntryInfo(entry, NULL, NULL, NULL, NULL, NULL, crc)) { - return -1; - } - zip->releaseEntry(entry); - return 0; - } - - int open_idmap(const char *path) - { - int fd = TEMP_FAILURE_RETRY(open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644)); - if (fd == -1) { - ALOGD("error: open %s: %s\n", path, strerror(errno)); - goto fail; - } - if (fchmod(fd, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH) < 0) { - ALOGD("error: fchmod %s: %s\n", path, strerror(errno)); - goto fail; - } - if (TEMP_FAILURE_RETRY(flock(fd, LOCK_EX)) != 0) { - ALOGD("error: flock %s: %s\n", path, strerror(errno)); - goto fail; - } - - return fd; -fail: - if (fd != -1) { - close(fd); - unlink(path); - } - return -1; - } - - int write_idmap(int fd, const uint32_t *data, size_t size) - { - if (lseek(fd, 0, SEEK_SET) < 0) { - return -1; - } - size_t bytesLeft = size; - while (bytesLeft > 0) { - ssize_t w = TEMP_FAILURE_RETRY(write(fd, data + size - bytesLeft, bytesLeft)); - if (w < 0) { - fprintf(stderr, "error: write: %s\n", strerror(errno)); - return -1; - } - bytesLeft -= static_cast<size_t>(w); - } - return 0; - } - - bool is_idmap_stale_fd(const char *target_apk_path, const char *overlay_apk_path, int idmap_fd) - { - static const size_t N = ResTable::IDMAP_HEADER_SIZE_BYTES; - struct stat st; - if (fstat(idmap_fd, &st) == -1) { - return true; - } - if (st.st_size < static_cast<off_t>(N)) { - // file is empty or corrupt - return true; - } - - char buf[N]; - size_t bytesLeft = N; - if (lseek(idmap_fd, 0, SEEK_SET) < 0) { - return true; - } - for (;;) { - ssize_t r = TEMP_FAILURE_RETRY(read(idmap_fd, buf + N - bytesLeft, bytesLeft)); - if (r < 0) { - return true; - } - bytesLeft -= static_cast<size_t>(r); - if (bytesLeft == 0) { - break; - } - if (r == 0) { - // "shouldn't happen" - return true; - } - } - - uint32_t version, cached_target_crc, cached_overlay_crc; - String8 cached_target_path, cached_overlay_path; - if (!ResTable::getIdmapInfo(buf, N, &version, &cached_target_crc, &cached_overlay_crc, - &cached_target_path, &cached_overlay_path)) { - return true; - } - - if (version != ResTable::IDMAP_CURRENT_VERSION) { - return true; - } - - if (cached_target_path != target_apk_path) { - return true; - } - if (cached_overlay_path != overlay_apk_path) { - return true; - } - - uint32_t actual_target_crc, actual_overlay_crc; - if (get_zip_entry_crc(target_apk_path, AssetManager::RESOURCES_FILENAME, - &actual_target_crc) == -1) { - return true; - } - if (get_zip_entry_crc(overlay_apk_path, AssetManager::RESOURCES_FILENAME, - &actual_overlay_crc) == -1) { - return true; - } - - return cached_target_crc != actual_target_crc || cached_overlay_crc != actual_overlay_crc; - } - - bool is_idmap_stale_path(const char *target_apk_path, const char *overlay_apk_path, - const char *idmap_path) - { - struct stat st; - if (stat(idmap_path, &st) == -1) { - // non-existing idmap is always stale; on other errors, abort idmap generation - return errno == ENOENT; - } - - int idmap_fd = TEMP_FAILURE_RETRY(open(idmap_path, O_RDONLY)); - if (idmap_fd == -1) { - return false; - } - bool is_stale = is_idmap_stale_fd(target_apk_path, overlay_apk_path, idmap_fd); - close(idmap_fd); - return is_stale; - } - - int create_idmap(const char *target_apk_path, const char *overlay_apk_path, - uint32_t **data, size_t *size) - { - uint32_t target_crc, overlay_crc; - if (get_zip_entry_crc(target_apk_path, AssetManager::RESOURCES_FILENAME, - &target_crc) == -1) { - return -1; - } - if (get_zip_entry_crc(overlay_apk_path, AssetManager::RESOURCES_FILENAME, - &overlay_crc) == -1) { - return -1; - } - - AssetManager am; - bool b = am.createIdmap(target_apk_path, overlay_apk_path, target_crc, overlay_crc, - data, size); - return b ? 0 : -1; - } - - int create_and_write_idmap(const char *target_apk_path, const char *overlay_apk_path, - int fd, bool check_if_stale) - { - if (check_if_stale) { - if (!is_idmap_stale_fd(target_apk_path, overlay_apk_path, fd)) { - // already up to date -- nothing to do - return 0; - } - } - - uint32_t *data = NULL; - size_t size; - - if (create_idmap(target_apk_path, overlay_apk_path, &data, &size) == -1) { - return -1; - } - - if (write_idmap(fd, data, size) == -1) { - free(data); - return -1; - } - - free(data); - return 0; - } -} - -int idmap_create_path(const char *target_apk_path, const char *overlay_apk_path, - const char *idmap_path) -{ - if (!is_idmap_stale_path(target_apk_path, overlay_apk_path, idmap_path)) { - // already up to date -- nothing to do - return EXIT_SUCCESS; - } - - int fd = open_idmap(idmap_path); - if (fd == -1) { - return EXIT_FAILURE; - } - - int r = create_and_write_idmap(target_apk_path, overlay_apk_path, fd, false); - close(fd); - if (r != 0) { - unlink(idmap_path); - } - return r == 0 ? EXIT_SUCCESS : EXIT_FAILURE; -} - -int idmap_create_fd(const char *target_apk_path, const char *overlay_apk_path, int fd) -{ - return create_and_write_idmap(target_apk_path, overlay_apk_path, fd, true) == 0 ? - EXIT_SUCCESS : EXIT_FAILURE; -} - -int idmap_verify_fd(const char *target_apk_path, const char *overlay_apk_path, int fd) -{ - return !is_idmap_stale_fd(target_apk_path, overlay_apk_path, fd) ? - EXIT_SUCCESS : EXIT_FAILURE; -} |