| /* |
| ** 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 8 /* max number of arguments in buffer */ |
| #define REPLY_MAX 256 /* largest reply allowed */ |
| |
| static int do_ping(char **arg, char reply[REPLY_MAX]) |
| { |
| return 0; |
| } |
| |
| static int do_install(char **arg, char reply[REPLY_MAX]) |
| { |
| 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]) |
| { |
| /* apk_path, uid, is_public, pkgname, instruction_set, vm_safe_mode, should_relocate */ |
| return dexopt(arg[0], atoi(arg[1]), atoi(arg[2]), arg[3], arg[4], atoi(arg[5]), 0); |
| } |
| |
| static int do_move_dex(char **arg, char reply[REPLY_MAX]) |
| { |
| return move_dex(arg[0], arg[1], arg[2]); /* src, dst, instruction_set */ |
| } |
| |
| static int do_rm_dex(char **arg, char reply[REPLY_MAX]) |
| { |
| return rm_dex(arg[0], arg[1]); /* pkgname, instruction_set */ |
| } |
| |
| static int do_remove(char **arg, char reply[REPLY_MAX]) |
| { |
| return uninstall(arg[0], atoi(arg[1])); /* pkgname, userid */ |
| } |
| |
| static int do_rename(char **arg, char reply[REPLY_MAX]) |
| { |
| return renamepkg(arg[0], arg[1]); /* oldpkgname, newpkgname */ |
| } |
| |
| static int do_fixuid(char **arg, char reply[REPLY_MAX]) |
| { |
| 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]) /* 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]) |
| { |
| return delete_cache(arg[0], atoi(arg[1])); /* pkgname, userid */ |
| } |
| |
| static int do_rm_code_cache(char **arg, char reply[REPLY_MAX]) |
| { |
| 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]) |
| { |
| return delete_user_data(arg[0], atoi(arg[1])); /* pkgname, userid */ |
| } |
| |
| static int do_mk_user_data(char **arg, char reply[REPLY_MAX]) |
| { |
| 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]) |
| { |
| return make_user_config(atoi(arg[0])); /* userid */ |
| } |
| |
| static int do_rm_user(char **arg, char reply[REPLY_MAX]) |
| { |
| return delete_user(atoi(arg[0])); /* userid */ |
| } |
| |
| static int do_movefiles(char **arg, char reply[REPLY_MAX]) |
| { |
| return movefiles(); |
| } |
| |
| static int do_linklib(char **arg, char reply[REPLY_MAX]) |
| { |
| return linklib(arg[0], arg[1], atoi(arg[2])); |
| } |
| |
| static int do_idmap(char **arg, char reply[REPLY_MAX]) |
| { |
| 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]) { |
| /* apk_path, uid, is_public, pkgname, instruction_set, vm_safe_mode, should_relocate */ |
| return dexopt(arg[0], atoi(arg[1]), atoi(arg[2]), arg[3], arg[4], 0, 1); |
| } |
| |
| 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", 6, do_dexopt }, |
| { "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 }, |
| }; |
| |
| static int readx(int s, void *_buf, int count) |
| { |
| char *buf = _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 = _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; |
| } |
| } |
| 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; |
| } |
| |
| // Take note of the system and vendor directories. |
| android_system_dirs.count = 4; |
| |
| android_system_dirs.dirs = 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 = "/vendor/app/"; |
| android_system_dirs.dirs[2].len = strlen(android_system_dirs.dirs[2].path); |
| |
| android_system_dirs.dirs[3].path = "/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, const char *argv[]) { |
| char buf[BUFFER_MAX]; |
| struct sockaddr addr; |
| socklen_t alen; |
| int lsocket, s, count; |
| 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; |
| } |
