frameworks/base: move idmap from frameworks/native
idmap depends on libandroidfw, so it should go in frameworks/base.
Change-Id: I3c1db3baa355f53d6b523d60f4377e63eff00c30
diff --git a/cmds/idmap/scan.cpp b/cmds/idmap/scan.cpp
new file mode 100644
index 0000000..c5fc941
--- /dev/null
+++ b/cmds/idmap/scan.cpp
@@ -0,0 +1,244 @@
+#include "idmap.h"
+
+#include <UniquePtr.h>
+#include <androidfw/ResourceTypes.h>
+#include <androidfw/StreamingZipInflater.h>
+#include <androidfw/ZipFileRO.h>
+#include <private/android_filesystem_config.h> // for AID_SYSTEM
+#include <utils/SortedVector.h>
+#include <utils/String16.h>
+#include <utils/String8.h>
+
+#include <dirent.h>
+
+#define NO_OVERLAY_TAG (-1000)
+
+using namespace android;
+
+namespace {
+ struct Overlay {
+ Overlay() {}
+ Overlay(const String8& a, const String8& i, int p) :
+ apk_path(a), idmap_path(i), priority(p) {}
+
+ bool operator<(Overlay const& rhs) const
+ {
+ // Note: order is reversed by design
+ return rhs.priority < priority;
+ }
+
+ String8 apk_path;
+ String8 idmap_path;
+ int priority;
+ };
+
+ bool writePackagesList(const char *filename, const SortedVector<Overlay>& overlayVector)
+ {
+ FILE* fout = fopen(filename, "w");
+ if (fout == NULL) {
+ return false;
+ }
+
+ for (size_t i = 0; i < overlayVector.size(); ++i) {
+ const Overlay& overlay = overlayVector[i];
+ fprintf(fout, "%s %s\n", overlay.apk_path.string(), overlay.idmap_path.string());
+ }
+
+ fclose(fout);
+
+ // Make file world readable since Zygote (running as root) will read
+ // it when creating the initial AssetManger object
+ const mode_t mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH; // 0644
+ if (chmod(filename, mode) == -1) {
+ unlink(filename);
+ return false;
+ }
+
+ return true;
+ }
+
+ String8 flatten_path(const char *path)
+ {
+ String16 tmp(path);
+ tmp.replaceAll('/', '@');
+ return String8(tmp);
+ }
+
+ int mkdir_p(const String8& path, uid_t uid, gid_t gid)
+ {
+ static const mode_t mode =
+ S_IRUSR | S_IWUSR | S_IXUSR | S_IRGRP | S_IWGRP | S_IXGRP | S_IROTH | S_IXOTH;
+ struct stat st;
+
+ if (stat(path.string(), &st) == 0) {
+ return 0;
+ }
+ if (mkdir_p(path.getPathDir(), uid, gid) < 0) {
+ return -1;
+ }
+ if (mkdir(path.string(), 0755) != 0) {
+ return -1;
+ }
+ if (chown(path.string(), uid, gid) == -1) {
+ return -1;
+ }
+ if (chmod(path.string(), mode) == -1) {
+ return -1;
+ }
+ return 0;
+ }
+
+ int parse_overlay_tag(const ResXMLTree& parser, const char *target_package_name)
+ {
+ const size_t N = parser.getAttributeCount();
+ String16 target;
+ int priority = -1;
+ for (size_t i = 0; i < N; ++i) {
+ size_t len;
+ String16 key(parser.getAttributeName(i, &len));
+ if (key == String16("targetPackage")) {
+ const uint16_t *p = parser.getAttributeStringValue(i, &len);
+ if (p) {
+ target = String16(p, len);
+ }
+ } else if (key == String16("priority")) {
+ Res_value v;
+ if (parser.getAttributeValue(i, &v) == sizeof(Res_value)) {
+ priority = v.data;
+ if (priority < 0 || priority > 9999) {
+ return -1;
+ }
+ }
+ }
+ }
+ if (target == String16(target_package_name)) {
+ return priority;
+ }
+ return NO_OVERLAY_TAG;
+ }
+
+ int parse_manifest(const void *data, size_t size, const char *target_package_name)
+ {
+ ResXMLTree parser(data, size);
+ if (parser.getError() != NO_ERROR) {
+ ALOGD("%s failed to init xml parser, error=0x%08x\n", __FUNCTION__, parser.getError());
+ return -1;
+ }
+
+ ResXMLParser::event_code_t type;
+ do {
+ type = parser.next();
+ if (type == ResXMLParser::START_TAG) {
+ size_t len;
+ String16 tag(parser.getElementName(&len));
+ if (tag == String16("overlay")) {
+ return parse_overlay_tag(parser, target_package_name);
+ }
+ }
+ } while (type != ResXMLParser::BAD_DOCUMENT && type != ResXMLParser::END_DOCUMENT);
+
+ return NO_OVERLAY_TAG;
+ }
+
+ int parse_apk(const char *path, const char *target_package_name)
+ {
+ UniquePtr<ZipFileRO> zip(ZipFileRO::open(path));
+ if (zip.get() == NULL) {
+ ALOGW("%s: failed to open zip %s\n", __FUNCTION__, path);
+ return -1;
+ }
+ ZipEntryRO entry;
+ if ((entry = zip->findEntryByName("AndroidManifest.xml")) == NULL) {
+ ALOGW("%s: failed to find entry AndroidManifest.xml\n", __FUNCTION__);
+ return -1;
+ }
+ size_t uncompLen = 0;
+ int method;
+ if (!zip->getEntryInfo(entry, &method, &uncompLen, NULL, NULL, NULL, NULL)) {
+ ALOGW("%s: failed to read entry info\n", __FUNCTION__);
+ return -1;
+ }
+ if (method != ZipFileRO::kCompressDeflated) {
+ ALOGW("%s: cannot handle zip compression method %d\n", __FUNCTION__, method);
+ return -1;
+ }
+ FileMap *dataMap = zip->createEntryFileMap(entry);
+ if (!dataMap) {
+ ALOGW("%s: failed to create FileMap\n", __FUNCTION__);
+ return -1;
+ }
+ char *buf = new char[uncompLen];
+ if (NULL == buf) {
+ ALOGW("%s: failed to allocate %d byte\n", __FUNCTION__, uncompLen);
+ dataMap->release();
+ return -1;
+ }
+ StreamingZipInflater inflater(dataMap, uncompLen);
+ if (inflater.read(buf, uncompLen) < 0) {
+ ALOGW("%s: failed to inflate %d byte\n", __FUNCTION__, uncompLen);
+ delete[] buf;
+ dataMap->release();
+ return -1;
+ }
+
+ int priority = parse_manifest(buf, uncompLen, target_package_name);
+ delete[] buf;
+ dataMap->release();
+ return priority;
+ }
+}
+
+int idmap_scan(const char *overlay_dir, const char *target_package_name,
+ const char *target_apk_path, const char *idmap_dir)
+{
+ String8 filename = String8(idmap_dir);
+ filename.appendPath("overlays.list");
+ if (unlink(filename.string()) != 0 && errno != ENOENT) {
+ return EXIT_FAILURE;
+ }
+
+ DIR *dir = opendir(overlay_dir);
+ if (dir == NULL) {
+ return EXIT_FAILURE;
+ }
+
+ SortedVector<Overlay> overlayVector;
+ struct dirent *dirent;
+ while ((dirent = readdir(dir)) != NULL) {
+ struct stat st;
+ char overlay_apk_path[PATH_MAX + 1];
+ snprintf(overlay_apk_path, PATH_MAX, "%s/%s", overlay_dir, dirent->d_name);
+ if (stat(overlay_apk_path, &st) < 0) {
+ continue;
+ }
+ if (!S_ISREG(st.st_mode)) {
+ continue;
+ }
+
+ int priority = parse_apk(overlay_apk_path, target_package_name);
+ if (priority < 0) {
+ continue;
+ }
+
+ String8 idmap_path(idmap_dir);
+ idmap_path.appendPath(flatten_path(overlay_apk_path + 1));
+ idmap_path.append("@idmap");
+
+ if (idmap_create_path(target_apk_path, overlay_apk_path, idmap_path.string()) != 0) {
+ ALOGE("error: failed to create idmap for target=%s overlay=%s idmap=%s\n",
+ target_apk_path, overlay_apk_path, idmap_path.string());
+ continue;
+ }
+
+ Overlay overlay(String8(overlay_apk_path), idmap_path, priority);
+ overlayVector.add(overlay);
+ }
+
+ closedir(dir);
+
+ if (!writePackagesList(filename.string(), overlayVector)) {
+ return EXIT_FAILURE;
+ }
+
+ return EXIT_SUCCESS;
+}