Switch installd to compile as C++.
This is the minimal change needed to switch it over to C++, which
paves the way for using more robust utilities like std::string.
Change-Id: I80ed6280146875eb6ddbbb340c05450388ca13f0
diff --git a/cmds/installd/installd.cpp b/cmds/installd/installd.cpp
new file mode 100644
index 0000000..ad2478b
--- /dev/null
+++ b/cmds/installd/installd.cpp
@@ -0,0 +1,760 @@
+/*
+** Copyright 2008, The Android Open Source Project
+**
+** Licensed under the Apache License, Version 2.0 (the "License");
+** you may not use this file except in compliance with the License.
+** You may obtain a copy of the License at
+**
+** http://www.apache.org/licenses/LICENSE-2.0
+**
+** Unless required by applicable law or agreed to in writing, software
+** distributed under the License is distributed on an "AS IS" BASIS,
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+** See the License for the specific language governing permissions and
+** limitations under the License.
+*/
+
+#include <sys/capability.h>
+#include <sys/prctl.h>
+#include <selinux/android.h>
+#include <selinux/avc.h>
+
+#include "installd.h"
+
+
+#define BUFFER_MAX 1024 /* input buffer for commands */
+#define TOKEN_MAX 16 /* max number of arguments in buffer */
+#define REPLY_MAX 256 /* largest reply allowed */
+
+static int do_ping(char **arg __unused, char reply[REPLY_MAX] __unused)
+{
+ return 0;
+}
+
+static int do_install(char **arg, char reply[REPLY_MAX] __unused)
+{
+ return install(arg[0], atoi(arg[1]), atoi(arg[2]), arg[3]); /* pkgname, uid, gid, seinfo */
+}
+
+static int do_dexopt(char **arg, char reply[REPLY_MAX] __unused)
+{
+ /* apk_path, uid, is_public, pkgname, instruction_set, vm_safe_mode, should_relocate
+ debuggable, outputPath */
+ return dexopt(arg[0], atoi(arg[1]), atoi(arg[2]), arg[3], arg[4], atoi(arg[5]), 0,
+ atoi(arg[6]), arg[7]);
+}
+
+static int do_mark_boot_complete(char **arg, char reply[REPLY_MAX] __unused)
+{
+ return mark_boot_complete(arg[0] /* instruction set */);
+}
+
+static int do_move_dex(char **arg, char reply[REPLY_MAX] __unused)
+{
+ return move_dex(arg[0], arg[1], arg[2]); /* src, dst, instruction_set */
+}
+
+static int do_rm_dex(char **arg, char reply[REPLY_MAX] __unused)
+{
+ return rm_dex(arg[0], arg[1]); /* pkgname, instruction_set */
+}
+
+static int do_remove(char **arg, char reply[REPLY_MAX] __unused)
+{
+ return uninstall(arg[0], atoi(arg[1])); /* pkgname, userid */
+}
+
+static int do_rename(char **arg, char reply[REPLY_MAX] __unused)
+{
+ return renamepkg(arg[0], arg[1]); /* oldpkgname, newpkgname */
+}
+
+static int do_fixuid(char **arg, char reply[REPLY_MAX] __unused)
+{
+ return fix_uid(arg[0], atoi(arg[1]), atoi(arg[2])); /* pkgname, uid, gid */
+}
+
+static int do_free_cache(char **arg, char reply[REPLY_MAX] __unused) /* TODO int:free_size */
+{
+ return free_cache((int64_t)atoll(arg[0])); /* free_size */
+}
+
+static int do_rm_cache(char **arg, char reply[REPLY_MAX] __unused)
+{
+ return delete_cache(arg[0], atoi(arg[1])); /* pkgname, userid */
+}
+
+static int do_rm_code_cache(char **arg, char reply[REPLY_MAX] __unused)
+{
+ return delete_code_cache(arg[0], atoi(arg[1])); /* pkgname, userid */
+}
+
+static int do_get_size(char **arg, char reply[REPLY_MAX])
+{
+ int64_t codesize = 0;
+ int64_t datasize = 0;
+ int64_t cachesize = 0;
+ int64_t asecsize = 0;
+ int res = 0;
+
+ /* pkgdir, userid, apkpath */
+ res = get_size(arg[0], atoi(arg[1]), arg[2], arg[3], arg[4], arg[5],
+ arg[6], &codesize, &datasize, &cachesize, &asecsize);
+
+ /*
+ * Each int64_t can take up 22 characters printed out. Make sure it
+ * doesn't go over REPLY_MAX in the future.
+ */
+ snprintf(reply, REPLY_MAX, "%" PRId64 " %" PRId64 " %" PRId64 " %" PRId64,
+ codesize, datasize, cachesize, asecsize);
+ return res;
+}
+
+static int do_rm_user_data(char **arg, char reply[REPLY_MAX] __unused)
+{
+ return delete_user_data(arg[0], atoi(arg[1])); /* pkgname, userid */
+}
+
+static int do_mk_user_data(char **arg, char reply[REPLY_MAX] __unused)
+{
+ return make_user_data(arg[0], atoi(arg[1]), atoi(arg[2]), arg[3]);
+ /* pkgname, uid, userid, seinfo */
+}
+
+static int do_mk_user_config(char **arg, char reply[REPLY_MAX] __unused)
+{
+ return make_user_config(atoi(arg[0])); /* userid */
+}
+
+static int do_rm_user(char **arg, char reply[REPLY_MAX] __unused)
+{
+ return delete_user(atoi(arg[0])); /* userid */
+}
+
+static int do_movefiles(char **arg __unused, char reply[REPLY_MAX] __unused)
+{
+ return movefiles();
+}
+
+static int do_linklib(char **arg, char reply[REPLY_MAX] __unused)
+{
+ return linklib(arg[0], arg[1], atoi(arg[2]));
+}
+
+static int do_idmap(char **arg, char reply[REPLY_MAX] __unused)
+{
+ return idmap(arg[0], arg[1], atoi(arg[2]));
+}
+
+static int do_restorecon_data(char **arg, char reply[REPLY_MAX] __attribute__((unused)))
+{
+ return restorecon_data(arg[0], arg[1], atoi(arg[2]));
+ /* pkgName, seinfo, uid*/
+}
+
+static int do_patchoat(char **arg, char reply[REPLY_MAX] __unused) {
+ /* apk_path, uid, is_public, pkgname, instruction_set, vm_safe_mode, should_relocate,
+ debuggable, outputPath */
+ return dexopt(arg[0], atoi(arg[1]), atoi(arg[2]), arg[3], arg[4], 0, 1, 0, "!");
+}
+
+static int do_create_oat_dir(char **arg, char reply[REPLY_MAX] __unused)
+{
+ /* oat_dir, instruction_set */
+ return create_oat_dir(arg[0], arg[1]);
+}
+
+static int do_rm_package_dir(char **arg, char reply[REPLY_MAX] __unused)
+{
+ /* oat_dir */
+ return rm_package_dir(arg[0]);
+}
+
+struct cmdinfo {
+ const char *name;
+ unsigned numargs;
+ int (*func)(char **arg, char reply[REPLY_MAX]);
+};
+
+struct cmdinfo cmds[] = {
+ { "ping", 0, do_ping },
+ { "install", 4, do_install },
+ { "dexopt", 8, do_dexopt },
+ { "markbootcomplete", 1, do_mark_boot_complete },
+ { "movedex", 3, do_move_dex },
+ { "rmdex", 2, do_rm_dex },
+ { "remove", 2, do_remove },
+ { "rename", 2, do_rename },
+ { "fixuid", 3, do_fixuid },
+ { "freecache", 1, do_free_cache },
+ { "rmcache", 2, do_rm_cache },
+ { "rmcodecache", 2, do_rm_code_cache },
+ { "getsize", 7, do_get_size },
+ { "rmuserdata", 2, do_rm_user_data },
+ { "movefiles", 0, do_movefiles },
+ { "linklib", 3, do_linklib },
+ { "mkuserdata", 4, do_mk_user_data },
+ { "mkuserconfig", 1, do_mk_user_config },
+ { "rmuser", 1, do_rm_user },
+ { "idmap", 3, do_idmap },
+ { "restorecondata", 3, do_restorecon_data },
+ { "patchoat", 5, do_patchoat },
+ { "createoatdir", 2, do_create_oat_dir },
+ { "rmpackagedir", 1, do_rm_package_dir},
+};
+
+static int readx(int s, void *_buf, int count)
+{
+ char *buf = (char *) _buf;
+ int n = 0, r;
+ if (count < 0) return -1;
+ while (n < count) {
+ r = read(s, buf + n, count - n);
+ if (r < 0) {
+ if (errno == EINTR) continue;
+ ALOGE("read error: %s\n", strerror(errno));
+ return -1;
+ }
+ if (r == 0) {
+ ALOGE("eof\n");
+ return -1; /* EOF */
+ }
+ n += r;
+ }
+ return 0;
+}
+
+static int writex(int s, const void *_buf, int count)
+{
+ const char *buf = (const char *) _buf;
+ int n = 0, r;
+ if (count < 0) return -1;
+ while (n < count) {
+ r = write(s, buf + n, count - n);
+ if (r < 0) {
+ if (errno == EINTR) continue;
+ ALOGE("write error: %s\n", strerror(errno));
+ return -1;
+ }
+ n += r;
+ }
+ return 0;
+}
+
+
+/* Tokenize the command buffer, locate a matching command,
+ * ensure that the required number of arguments are provided,
+ * call the function(), return the result.
+ */
+static int execute(int s, char cmd[BUFFER_MAX])
+{
+ char reply[REPLY_MAX];
+ char *arg[TOKEN_MAX+1];
+ unsigned i;
+ unsigned n = 0;
+ unsigned short count;
+ int ret = -1;
+
+ // ALOGI("execute('%s')\n", cmd);
+
+ /* default reply is "" */
+ reply[0] = 0;
+
+ /* n is number of args (not counting arg[0]) */
+ arg[0] = cmd;
+ while (*cmd) {
+ if (isspace(*cmd)) {
+ *cmd++ = 0;
+ n++;
+ arg[n] = cmd;
+ if (n == TOKEN_MAX) {
+ ALOGE("too many arguments\n");
+ goto done;
+ }
+ }
+ if (*cmd) {
+ cmd++;
+ }
+ }
+
+ for (i = 0; i < sizeof(cmds) / sizeof(cmds[0]); i++) {
+ if (!strcmp(cmds[i].name,arg[0])) {
+ if (n != cmds[i].numargs) {
+ ALOGE("%s requires %d arguments (%d given)\n",
+ cmds[i].name, cmds[i].numargs, n);
+ } else {
+ ret = cmds[i].func(arg + 1, reply);
+ }
+ goto done;
+ }
+ }
+ ALOGE("unsupported command '%s'\n", arg[0]);
+
+done:
+ if (reply[0]) {
+ n = snprintf(cmd, BUFFER_MAX, "%d %s", ret, reply);
+ } else {
+ n = snprintf(cmd, BUFFER_MAX, "%d", ret);
+ }
+ if (n > BUFFER_MAX) n = BUFFER_MAX;
+ count = n;
+
+ // ALOGI("reply: '%s'\n", cmd);
+ if (writex(s, &count, sizeof(count))) return -1;
+ if (writex(s, cmd, count)) return -1;
+ return 0;
+}
+
+/**
+ * Initialize all the global variables that are used elsewhere. Returns 0 upon
+ * success and -1 on error.
+ */
+void free_globals() {
+ size_t i;
+
+ for (i = 0; i < android_system_dirs.count; i++) {
+ if (android_system_dirs.dirs[i].path != NULL) {
+ free(android_system_dirs.dirs[i].path);
+ }
+ }
+
+ free(android_system_dirs.dirs);
+}
+
+int initialize_globals() {
+ // Get the android data directory.
+ if (get_path_from_env(&android_data_dir, "ANDROID_DATA") < 0) {
+ return -1;
+ }
+
+ // Get the android app directory.
+ if (copy_and_append(&android_app_dir, &android_data_dir, APP_SUBDIR) < 0) {
+ return -1;
+ }
+
+ // Get the android protected app directory.
+ if (copy_and_append(&android_app_private_dir, &android_data_dir, PRIVATE_APP_SUBDIR) < 0) {
+ return -1;
+ }
+
+ // Get the android app native library directory.
+ if (copy_and_append(&android_app_lib_dir, &android_data_dir, APP_LIB_SUBDIR) < 0) {
+ return -1;
+ }
+
+ // Get the sd-card ASEC mount point.
+ if (get_path_from_env(&android_asec_dir, "ASEC_MOUNTPOINT") < 0) {
+ return -1;
+ }
+
+ // Get the android media directory.
+ if (copy_and_append(&android_media_dir, &android_data_dir, MEDIA_SUBDIR) < 0) {
+ return -1;
+ }
+
+ // Get the android external app directory.
+ if (get_path_from_string(&android_mnt_expand_dir, "/mnt/expand/") < 0) {
+ return -1;
+ }
+
+ // Take note of the system and vendor directories.
+ android_system_dirs.count = 4;
+
+ android_system_dirs.dirs = (dir_rec_t*) calloc(android_system_dirs.count, sizeof(dir_rec_t));
+ if (android_system_dirs.dirs == NULL) {
+ ALOGE("Couldn't allocate array for dirs; aborting\n");
+ return -1;
+ }
+
+ dir_rec_t android_root_dir;
+ if (get_path_from_env(&android_root_dir, "ANDROID_ROOT") < 0) {
+ ALOGE("Missing ANDROID_ROOT; aborting\n");
+ return -1;
+ }
+
+ android_system_dirs.dirs[0].path = build_string2(android_root_dir.path, APP_SUBDIR);
+ android_system_dirs.dirs[0].len = strlen(android_system_dirs.dirs[0].path);
+
+ android_system_dirs.dirs[1].path = build_string2(android_root_dir.path, PRIV_APP_SUBDIR);
+ android_system_dirs.dirs[1].len = strlen(android_system_dirs.dirs[1].path);
+
+ android_system_dirs.dirs[2].path = strdup("/vendor/app/");
+ android_system_dirs.dirs[2].len = strlen(android_system_dirs.dirs[2].path);
+
+ android_system_dirs.dirs[3].path = strdup("/oem/app/");
+ android_system_dirs.dirs[3].len = strlen(android_system_dirs.dirs[3].path);
+
+ return 0;
+}
+
+int initialize_directories() {
+ int res = -1;
+
+ // Read current filesystem layout version to handle upgrade paths
+ char version_path[PATH_MAX];
+ snprintf(version_path, PATH_MAX, "%s.layout_version", android_data_dir.path);
+
+ int oldVersion;
+ if (fs_read_atomic_int(version_path, &oldVersion) == -1) {
+ oldVersion = 0;
+ }
+ int version = oldVersion;
+
+ // /data/user
+ char *user_data_dir = build_string2(android_data_dir.path, SECONDARY_USER_PREFIX);
+ // /data/data
+ char *legacy_data_dir = build_string2(android_data_dir.path, PRIMARY_USER_PREFIX);
+ // /data/user/0
+ char *primary_data_dir = build_string3(android_data_dir.path, SECONDARY_USER_PREFIX, "0");
+ if (!user_data_dir || !legacy_data_dir || !primary_data_dir) {
+ goto fail;
+ }
+
+ // Make the /data/user directory if necessary
+ if (access(user_data_dir, R_OK) < 0) {
+ if (mkdir(user_data_dir, 0711) < 0) {
+ goto fail;
+ }
+ if (chown(user_data_dir, AID_SYSTEM, AID_SYSTEM) < 0) {
+ goto fail;
+ }
+ if (chmod(user_data_dir, 0711) < 0) {
+ goto fail;
+ }
+ }
+ // Make the /data/user/0 symlink to /data/data if necessary
+ if (access(primary_data_dir, R_OK) < 0) {
+ if (symlink(legacy_data_dir, primary_data_dir)) {
+ goto fail;
+ }
+ }
+
+ if (version == 0) {
+ // Introducing multi-user, so migrate /data/media contents into /data/media/0
+ ALOGD("Upgrading /data/media for multi-user");
+
+ // Ensure /data/media
+ if (fs_prepare_dir(android_media_dir.path, 0770, AID_MEDIA_RW, AID_MEDIA_RW) == -1) {
+ goto fail;
+ }
+
+ // /data/media.tmp
+ char media_tmp_dir[PATH_MAX];
+ snprintf(media_tmp_dir, PATH_MAX, "%smedia.tmp", android_data_dir.path);
+
+ // Only copy when upgrade not already in progress
+ if (access(media_tmp_dir, F_OK) == -1) {
+ if (rename(android_media_dir.path, media_tmp_dir) == -1) {
+ ALOGE("Failed to move legacy media path: %s", strerror(errno));
+ goto fail;
+ }
+ }
+
+ // Create /data/media again
+ if (fs_prepare_dir(android_media_dir.path, 0770, AID_MEDIA_RW, AID_MEDIA_RW) == -1) {
+ goto fail;
+ }
+
+ if (selinux_android_restorecon(android_media_dir.path, 0)) {
+ goto fail;
+ }
+
+ // /data/media/0
+ char owner_media_dir[PATH_MAX];
+ snprintf(owner_media_dir, PATH_MAX, "%s0", android_media_dir.path);
+
+ // Move any owner data into place
+ if (access(media_tmp_dir, F_OK) == 0) {
+ if (rename(media_tmp_dir, owner_media_dir) == -1) {
+ ALOGE("Failed to move owner media path: %s", strerror(errno));
+ goto fail;
+ }
+ }
+
+ // Ensure media directories for any existing users
+ DIR *dir;
+ struct dirent *dirent;
+ char user_media_dir[PATH_MAX];
+
+ dir = opendir(user_data_dir);
+ if (dir != NULL) {
+ while ((dirent = readdir(dir))) {
+ if (dirent->d_type == DT_DIR) {
+ const char *name = dirent->d_name;
+
+ // skip "." and ".."
+ if (name[0] == '.') {
+ if (name[1] == 0) continue;
+ if ((name[1] == '.') && (name[2] == 0)) continue;
+ }
+
+ // /data/media/<user_id>
+ snprintf(user_media_dir, PATH_MAX, "%s%s", android_media_dir.path, name);
+ if (fs_prepare_dir(user_media_dir, 0770, AID_MEDIA_RW, AID_MEDIA_RW) == -1) {
+ goto fail;
+ }
+ }
+ }
+ closedir(dir);
+ }
+
+ version = 1;
+ }
+
+ // /data/media/obb
+ char media_obb_dir[PATH_MAX];
+ snprintf(media_obb_dir, PATH_MAX, "%sobb", android_media_dir.path);
+
+ if (version == 1) {
+ // Introducing /data/media/obb for sharing OBB across users; migrate
+ // any existing OBB files from owner.
+ ALOGD("Upgrading to shared /data/media/obb");
+
+ // /data/media/0/Android/obb
+ char owner_obb_path[PATH_MAX];
+ snprintf(owner_obb_path, PATH_MAX, "%s0/Android/obb", android_media_dir.path);
+
+ // Only move if target doesn't already exist
+ if (access(media_obb_dir, F_OK) != 0 && access(owner_obb_path, F_OK) == 0) {
+ if (rename(owner_obb_path, media_obb_dir) == -1) {
+ ALOGE("Failed to move OBB from owner: %s", strerror(errno));
+ goto fail;
+ }
+ }
+
+ version = 2;
+ }
+
+ if (ensure_media_user_dirs(0) == -1) {
+ ALOGE("Failed to setup media for user 0");
+ goto fail;
+ }
+ if (fs_prepare_dir(media_obb_dir, 0770, AID_MEDIA_RW, AID_MEDIA_RW) == -1) {
+ goto fail;
+ }
+
+ if (ensure_config_user_dirs(0) == -1) {
+ ALOGE("Failed to setup misc for user 0");
+ goto fail;
+ }
+
+ if (version == 2) {
+ ALOGD("Upgrading to /data/misc/user directories");
+
+ char misc_dir[PATH_MAX];
+ snprintf(misc_dir, PATH_MAX, "%smisc", android_data_dir.path);
+
+ char keychain_added_dir[PATH_MAX];
+ snprintf(keychain_added_dir, PATH_MAX, "%s/keychain/cacerts-added", misc_dir);
+
+ char keychain_removed_dir[PATH_MAX];
+ snprintf(keychain_removed_dir, PATH_MAX, "%s/keychain/cacerts-removed", misc_dir);
+
+ DIR *dir;
+ struct dirent *dirent;
+ dir = opendir(user_data_dir);
+ if (dir != NULL) {
+ while ((dirent = readdir(dir))) {
+ const char *name = dirent->d_name;
+
+ // skip "." and ".."
+ if (name[0] == '.') {
+ if (name[1] == 0) continue;
+ if ((name[1] == '.') && (name[2] == 0)) continue;
+ }
+
+ uint32_t user_id = atoi(name);
+
+ // /data/misc/user/<user_id>
+ if (ensure_config_user_dirs(user_id) == -1) {
+ goto fail;
+ }
+
+ char misc_added_dir[PATH_MAX];
+ snprintf(misc_added_dir, PATH_MAX, "%s/user/%s/cacerts-added", misc_dir, name);
+
+ char misc_removed_dir[PATH_MAX];
+ snprintf(misc_removed_dir, PATH_MAX, "%s/user/%s/cacerts-removed", misc_dir, name);
+
+ uid_t uid = multiuser_get_uid(user_id, AID_SYSTEM);
+ gid_t gid = uid;
+ if (access(keychain_added_dir, F_OK) == 0) {
+ if (copy_dir_files(keychain_added_dir, misc_added_dir, uid, gid) != 0) {
+ ALOGE("Some files failed to copy");
+ }
+ }
+ if (access(keychain_removed_dir, F_OK) == 0) {
+ if (copy_dir_files(keychain_removed_dir, misc_removed_dir, uid, gid) != 0) {
+ ALOGE("Some files failed to copy");
+ }
+ }
+ }
+ closedir(dir);
+
+ if (access(keychain_added_dir, F_OK) == 0) {
+ delete_dir_contents(keychain_added_dir, 1, 0);
+ }
+ if (access(keychain_removed_dir, F_OK) == 0) {
+ delete_dir_contents(keychain_removed_dir, 1, 0);
+ }
+ }
+
+ version = 3;
+ }
+
+ // Persist layout version if changed
+ if (version != oldVersion) {
+ if (fs_write_atomic_int(version_path, version) == -1) {
+ ALOGE("Failed to save version to %s: %s", version_path, strerror(errno));
+ goto fail;
+ }
+ }
+
+ // Success!
+ res = 0;
+
+fail:
+ free(user_data_dir);
+ free(legacy_data_dir);
+ free(primary_data_dir);
+ return res;
+}
+
+static void drop_privileges() {
+ if (prctl(PR_SET_KEEPCAPS, 1) < 0) {
+ ALOGE("prctl(PR_SET_KEEPCAPS) failed: %s\n", strerror(errno));
+ exit(1);
+ }
+
+ if (setgid(AID_INSTALL) < 0) {
+ ALOGE("setgid() can't drop privileges; exiting.\n");
+ exit(1);
+ }
+
+ if (setuid(AID_INSTALL) < 0) {
+ ALOGE("setuid() can't drop privileges; exiting.\n");
+ exit(1);
+ }
+
+ struct __user_cap_header_struct capheader;
+ struct __user_cap_data_struct capdata[2];
+ memset(&capheader, 0, sizeof(capheader));
+ memset(&capdata, 0, sizeof(capdata));
+ capheader.version = _LINUX_CAPABILITY_VERSION_3;
+ capheader.pid = 0;
+
+ capdata[CAP_TO_INDEX(CAP_DAC_OVERRIDE)].permitted |= CAP_TO_MASK(CAP_DAC_OVERRIDE);
+ capdata[CAP_TO_INDEX(CAP_CHOWN)].permitted |= CAP_TO_MASK(CAP_CHOWN);
+ capdata[CAP_TO_INDEX(CAP_SETUID)].permitted |= CAP_TO_MASK(CAP_SETUID);
+ capdata[CAP_TO_INDEX(CAP_SETGID)].permitted |= CAP_TO_MASK(CAP_SETGID);
+ capdata[CAP_TO_INDEX(CAP_FOWNER)].permitted |= CAP_TO_MASK(CAP_FOWNER);
+
+ capdata[0].effective = capdata[0].permitted;
+ capdata[1].effective = capdata[1].permitted;
+ capdata[0].inheritable = 0;
+ capdata[1].inheritable = 0;
+
+ if (capset(&capheader, &capdata[0]) < 0) {
+ ALOGE("capset failed: %s\n", strerror(errno));
+ exit(1);
+ }
+}
+
+static int log_callback(int type, const char *fmt, ...) {
+ va_list ap;
+ int priority;
+
+ switch (type) {
+ case SELINUX_WARNING:
+ priority = ANDROID_LOG_WARN;
+ break;
+ case SELINUX_INFO:
+ priority = ANDROID_LOG_INFO;
+ break;
+ default:
+ priority = ANDROID_LOG_ERROR;
+ break;
+ }
+ va_start(ap, fmt);
+ LOG_PRI_VA(priority, "SELinux", fmt, ap);
+ va_end(ap);
+ return 0;
+}
+
+int main(const int argc __unused, const char *argv[] __unused) {
+ char buf[BUFFER_MAX];
+ struct sockaddr addr;
+ socklen_t alen;
+ int lsocket, s;
+ int selinux_enabled = (is_selinux_enabled() > 0);
+
+ ALOGI("installd firing up\n");
+
+ union selinux_callback cb;
+ cb.func_log = log_callback;
+ selinux_set_callback(SELINUX_CB_LOG, cb);
+
+ if (initialize_globals() < 0) {
+ ALOGE("Could not initialize globals; exiting.\n");
+ exit(1);
+ }
+
+ if (initialize_directories() < 0) {
+ ALOGE("Could not create directories; exiting.\n");
+ exit(1);
+ }
+
+ if (selinux_enabled && selinux_status_open(true) < 0) {
+ ALOGE("Could not open selinux status; exiting.\n");
+ exit(1);
+ }
+
+ drop_privileges();
+
+ lsocket = android_get_control_socket(SOCKET_PATH);
+ if (lsocket < 0) {
+ ALOGE("Failed to get socket from environment: %s\n", strerror(errno));
+ exit(1);
+ }
+ if (listen(lsocket, 5)) {
+ ALOGE("Listen on socket failed: %s\n", strerror(errno));
+ exit(1);
+ }
+ fcntl(lsocket, F_SETFD, FD_CLOEXEC);
+
+ for (;;) {
+ alen = sizeof(addr);
+ s = accept(lsocket, &addr, &alen);
+ if (s < 0) {
+ ALOGE("Accept failed: %s\n", strerror(errno));
+ continue;
+ }
+ fcntl(s, F_SETFD, FD_CLOEXEC);
+
+ ALOGI("new connection\n");
+ for (;;) {
+ unsigned short count;
+ if (readx(s, &count, sizeof(count))) {
+ ALOGE("failed to read size\n");
+ break;
+ }
+ if ((count < 1) || (count >= BUFFER_MAX)) {
+ ALOGE("invalid size %d\n", count);
+ break;
+ }
+ if (readx(s, buf, count)) {
+ ALOGE("failed to read command\n");
+ break;
+ }
+ buf[count] = 0;
+ if (selinux_enabled && selinux_status_updated() > 0) {
+ selinux_android_seapp_context_reload();
+ }
+ if (execute(s, buf)) break;
+ }
+ ALOGI("closing connection\n");
+ close(s);
+ }
+
+ return 0;
+}