/*
* Copyright (C) 2007 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 <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <getopt.h>
#include <limits.h>
#include <linux/input.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/reboot.h>
#include <sys/types.h>
#include <time.h>
#include <unistd.h>
#include "bootloader.h"
#include "commands.h"
#include "common.h"
#include "cutils/properties.h"
#include "firmware.h"
#include "install.h"
#include "minui/minui.h"
#include "minzip/DirUtil.h"
#include "roots.h"
static const struct option OPTIONS[] = {
{ "send_intent", required_argument, NULL, 's' },
{ "update_package", required_argument, NULL, 'u' },
{ "wipe_data", no_argument, NULL, 'w' },
{ "wipe_cache", no_argument, NULL, 'c' },
};
static const char *COMMAND_FILE = "CACHE:recovery/command";
static const char *INTENT_FILE = "CACHE:recovery/intent";
static const char *LOG_FILE = "CACHE:recovery/log";
static const char *SDCARD_PACKAGE_FILE = "SDCARD:update.zip";
static const char *TEMPORARY_LOG_FILE = "/tmp/recovery.log";
/*
* The recovery tool communicates with the main system through /cache files.
* /cache/recovery/command - INPUT - command line for tool, one arg per line
* /cache/recovery/log - OUTPUT - combined log file from recovery run(s)
* /cache/recovery/intent - OUTPUT - intent that was passed in
*
* The arguments which may be supplied in the recovery.command file:
* --send_intent=anystring - write the text out to recovery.intent
* --update_package=root:path - verify install an OTA package file
* --wipe_data - erase user data (and cache), then reboot
* --wipe_cache - wipe cache (but not user data), then reboot
*
* After completing, we remove /cache/recovery/command and reboot.
*/
static const int MAX_ARG_LENGTH = 4096;
static const int MAX_ARGS = 100;
// open a file given in root:path format, mounting partitions as necessary
static FILE*
fopen_root_path(const char *root_path, const char *mode) {
if (ensure_root_path_mounted(root_path) != 0) {
LOGE("Can't mount %s\n", root_path);
return NULL;
}
char path[PATH_MAX] = "";
if (translate_root_path(root_path, path, sizeof(path)) == NULL) {
LOGE("Bad path %s\n", root_path);
return NULL;
}
// When writing, try to create the containing directory, if necessary.
// Use generous permissions, the system (init.rc) will reset them.
if (strchr("wa", mode[0])) dirCreateHierarchy(path, 0777, NULL, 1);
FILE *fp = fopen(path, mode);
if (fp == NULL) LOGE("Can't open %s\n", path);
return fp;
}
// close a file, log an error if the error indicator is set
static void
check_and_fclose(FILE *fp, const char *name) {
fflush(fp);
if (ferror(fp)) LOGE("Error in %s\n(%s)\n", name, strerror(errno));
fclose(fp);
}
// command line args come from, in decreasing precedence:
// - the actual command line
// - the bootloader control block (one per line, after "recovery")
// - the contents of COMMAND_FILE (one per line)
static void
get_args(int *argc, char ***argv) {
if (*argc > 1) return; // actual command line arguments take priority
char *argv0 = (*argv)[0];
struct bootloader_message boot;
if (!get_bootloader_message(&boot)) {
if (boot.command[0] != 0 && boot.command[0] != 255) {
LOGI("Boot command: %.*s\n", sizeof(boot.command), boot.command);
}
if (boot.status[0] != 0 && boot.status[0] != 255) {
LOGI("Boot status: %.*s\n", sizeof(boot.status), boot.status);
}
// Ensure that from here on, a reboot goes back into recovery
strcpy(boot.command, "boot-recovery");
set_bootloader_message(&boot);
boot.recovery[sizeof(boot.recovery) - 1] = '\0'; // Ensure termination
const char *arg = strtok(boot.recovery, "\n");
if (arg != NULL && !strcmp(arg, "recovery")) {
*argv = (char **) malloc(sizeof(char *) * MAX_ARGS);
(*argv)[0] = argv0;
for (*argc = 1; *argc < MAX_ARGS; ++*argc) {
if ((arg = strtok(NULL, "\n")) == NULL) break;
(*argv)[*argc] = strdup(arg);
}
LOGI("Got arguments from boot message\n");
return;
} else if (boot.recovery[0] != 0 && boot.recovery[0] != 255) {
LOGE("Bad boot message\n\"%.20s\"\n", boot.recovery);
}
}
FILE *fp = fopen_root_path(COMMAND_FILE, "r");
if (fp == NULL) return;
*argv = (char **) malloc(sizeof(char *) * MAX_ARGS);
(*argv)[0] = argv0; // use the same program name
char buf[MAX_ARG_LENGTH];
for (*argc = 1; *argc < MAX_ARGS && fgets(buf, sizeof(buf), fp); ++*argc) {
(*argv)[*argc] = strdup(strtok(buf, "\r\n")); // Strip newline.
}
check_and_fclose(fp, COMMAND_FILE);
LOGI("Got arguments from %s\n", COMMAND_FILE);
}
// clear the recovery command and prepare to boot a (hopefully working) system,
// copy our log file to cache as well (for the system to read), and
// record any intent we were asked to communicate back to the system.
// this function is idempotent: call it as many times as you like.
static void
finish_recovery(const char *send_intent)
{
// By this point, we're ready to return to the main system...
if (send_intent != NULL) {
FILE *fp = fopen_root_path(INTENT_FILE, "w");
if (fp != NULL) {
fputs(send_intent, fp);
check_and_fclose(fp, INTENT_FILE);
}
}
// Copy logs to cache so the system can find out what happened.
FILE *log = fopen_root_path(LOG_FILE, "a");
if (log != NULL) {
FILE *tmplog = fopen(TEMPORARY_LOG_FILE, "r");
if (tmplog == NULL) {
LOGE("Can't open %s\n", TEMPORARY_LOG_FILE);
} else {
static long tmplog_offset = 0;
fseek(tmplog, tmplog_offset, SEEK_SET); // Since last write
char buf[4096];
while (fgets(buf, sizeof(buf), tmplog)) fputs(buf, log);
tmplog_offset = ftell(tmplog);
check_and_fclose(tmplog, TEMPORARY_LOG_FILE);
}
check_and_fclose(log, LOG_FILE);
}
// Reset the bootloader message to revert to a normal main system boot.
struct bootloader_message boot;
memset(&boot, 0, sizeof(boot));
set_bootloader_message(&boot);
// Remove the command file, so recovery won't repeat indefinitely.
char path[PATH_MAX] = "";
if (ensure_root_path_mounted(COMMAND_FILE) != 0 ||
translate_root_path(COMMAND_FILE, path, sizeof(path)) == NULL ||
(unlink(path) && errno != ENOENT)) {
LOGW("Can't unlink %s\n", COMMAND_FILE);
}
sync(); // For good measure.
}
#define TEST_AMEND 0
#if TEST_AMEND
static void
test_amend()
{
extern int test_symtab(void);
extern int test_cmd_fn(void);
extern int test_permissions(void);
int ret;
LOGD("Testing symtab...\n");
ret = test_symtab();
LOGD(" returned %d\n", ret);
LOGD("Testing cmd_fn...\n");
ret = test_cmd_fn();
LOGD(" returned %d\n", ret);
LOGD("Testing permissions...\n");
ret = test_permissions();
LOGD(" returned %d\n", ret);
}
#endif // TEST_AMEND
static int
erase_root(const char *root)
{
ui_set_background(BACKGROUND_ICON_INSTALLING);
ui_show_indeterminate_progress();
ui_print("Formatting %s...\n", root);
return format_root_device(root);
}
static void
prompt_and_wait()
{
ui_print("\n"
"Home+Back - reboot system now\n"
"Alt+L - toggle log text display\n"
"Alt+S - apply sdcard:update.zip\n"
"Alt+W - wipe data/factory reset\n");
for (;;) {
finish_recovery(NULL);
ui_reset_progress();
int key = ui_wait_key();
int alt = ui_key_pressed(KEY_LEFTALT) || ui_key_pressed(KEY_RIGHTALT);
if (key == KEY_DREAM_BACK && ui_key_pressed(KEY_DREAM_HOME)) {
// Wait for the keys to be released, to avoid triggering
// special boot modes (like coming back into recovery!).
while (ui_key_pressed(KEY_DREAM_BACK) ||
ui_key_pressed(KEY_DREAM_HOME)) {
usleep(1000);
}
break;
} else if (alt && key == KEY_W) {
ui_print("\n");
erase_root("DATA:");
erase_root("CACHE:");
ui_print("Data wipe complete.\n");
if (!ui_text_visible()) break;
} else if (alt && key == KEY_S) {
ui_print("\nInstalling from sdcard...\n");
int status = install_package(SDCARD_PACKAGE_FILE);
if (status != INSTALL_SUCCESS) {
ui_set_background(BACKGROUND_ICON_ERROR);
ui_print("Installation aborted.\n");
} else if (!ui_text_visible()) {
break; // reboot if logs aren't visible
}
ui_print("\nPress Home+Back to reboot\n");
}
}
}
static void
print_property(const char *key, const char *name, void *cookie)
{
fprintf(stderr, "%s=%s\n", key, name);
}
int
main(int argc, char **argv)
{
time_t start = time(NULL);
// If these fail, there's not really anywhere to complain...
freopen(TEMPORARY_LOG_FILE, "a", stdout); setbuf(stdout, NULL);
freopen(TEMPORARY_LOG_FILE, "a", stderr); setbuf(stderr, NULL);
fprintf(stderr, "Starting recovery on %s", ctime(&start));
ui_init();
ui_print("Android system recovery utility\n");
get_args(&argc, &argv);
int previous_runs = 0;
const char *send_intent = NULL;
const char *update_package = NULL;
int wipe_data = 0, wipe_cache = 0;
int arg;
while ((arg = getopt_long(argc, argv, "", OPTIONS, NULL)) != -1) {
switch (arg) {
case 'p': previous_runs = atoi(optarg); break;
case 's': send_intent = optarg; break;
case 'u': update_package = optarg; break;
case 'w': wipe_data = wipe_cache = 1; break;
case 'c': wipe_cache = 1; break;
case '?':
LOGE("Invalid command argument\n");
continue;
}
}
fprintf(stderr, "Command:");
for (arg = 0; arg < argc; arg++) {
fprintf(stderr, " \"%s\"", argv[arg]);
}
fprintf(stderr, "\n\n");
property_list(print_property, NULL);
fprintf(stderr, "\n");
#if TEST_AMEND
test_amend();
#endif
RecoveryCommandContext ctx = { NULL };
if (register_update_commands(&ctx)) {
LOGE("Can't install update commands\n");
}
int status = INSTALL_SUCCESS;
if (update_package != NULL) {
status = install_package(update_package);
if (status != INSTALL_SUCCESS) ui_print("Installation aborted.\n");
} else if (wipe_data || wipe_cache) {
if (wipe_data && erase_root("DATA:")) status = INSTALL_ERROR;
if (wipe_cache && erase_root("CACHE:")) status = INSTALL_ERROR;
if (status != INSTALL_SUCCESS) ui_print("Data wipe failed.\n");
} else {
status = INSTALL_ERROR; // No command specified
}
if (status != INSTALL_SUCCESS) ui_set_background(BACKGROUND_ICON_ERROR);
if (status != INSTALL_SUCCESS || ui_text_visible()) prompt_and_wait();
// If there is a radio image pending, reboot now to install it.
maybe_install_firmware_update(send_intent);
// Otherwise, get ready to boot the main system...
finish_recovery(send_intent);
ui_print("Rebooting...\n");
sync();
reboot(RB_AUTOBOOT);
return EXIT_SUCCESS;
}
