/*
* Copyright (C) 2011 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 <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include <linux/input.h>
#include "bootloader.h"
#include "common.h"
#include "extra-functions.h"
#include "data.h"
#include "variables.h"
void run_script(const char *str1, const char *str2, const char *str3, const char *str4, const char *str5, const char *str6, const char *str7, int request_confirm)
{
ui_print("%s", str1);
ui_print("%s", str2);
pid_t pid = fork();
if (pid == 0) {
char *args[] = { "/sbin/sh", "-c", (char*)str3, "1>&2", NULL };
execv("/sbin/sh", args);
fprintf(stderr, str4, strerror(errno));
_exit(-1);
}
int status;
while (waitpid(pid, &status, WNOHANG) == 0) {
ui_print(".");
sleep(1);
}
ui_print("\n");
if (!WIFEXITED(status) || (WEXITSTATUS(status) != 0)) {
ui_print("%s", str5);
} else {
ui_print("%s", str6);
}
}
void check_and_run_script(const char* script_file, const char* display_name)
{
// Check for and run startup script if script exists
struct stat st;
if (stat(script_file, &st) == 0) {
ui_print("Running %s script...\n", display_name);
char command[255];
strcpy(command, "chmod 755 ");
strcat(command, script_file);
system(command);
system(script_file);
ui_print("\nFinished running %s script.\n", display_name);
}
}
int check_backup_name(int show_error) {
// Check the backup name to ensure that it is the correct size and contains only valid characters
// and that a backup with that name doesn't already exist
char backup_name[MAX_BACKUP_NAME_LEN];
char backup_loc[255], tw_image_dir[255];
int copy_size = strlen(DataManager_GetStrValue(TW_BACKUP_NAME));
int index, cur_char;
struct stat st;
// Check size
if (copy_size > MAX_BACKUP_NAME_LEN) {
if (show_error)
LOGE("Backup name is too long.\n");
return -2;
}
// Check characters
strncpy(backup_name, DataManager_GetStrValue(TW_BACKUP_NAME), copy_size);
if (strcmp(backup_name, "0") == 0)
return 0; // A "0" (zero) means to use the current timestamp for the backup name
for (index=0; index<copy_size; index++) {
cur_char = (int)backup_name[index];
if (cur_char == 32 || (cur_char >= 48 && cur_char <= 57) || (cur_char >= 65 && cur_char <= 91) || cur_char == 93 || cur_char == 95 || (cur_char >= 97 && cur_char <= 123) || cur_char == 125 || cur_char == 45 || cur_char == 46) {
// These are valid characters
// Numbers
// Upper case letters
// Lower case letters
// Space
// and -_.{}[]
} else {
if (show_error)
LOGE("Backup name '%s' contains invalid character: '%c'\n", backup_name, (char)cur_char);
return -3;
}
}
// Check to make sure that a backup with this name doesn't already exist
strcpy(backup_loc, DataManager_GetStrValue(TW_BACKUPS_FOLDER_VAR));
sprintf(tw_image_dir,"%s/%s/.", backup_loc, backup_name);
if (stat(tw_image_dir, &st) == 0) {
if (show_error)
LOGE("A backup with this name already exists.\n");
return -4;
}
// No problems found, return 0
return 0;
}
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 *LAST_LOG_FILE = "/cache/recovery/last_log";
static const char *LAST_INSTALL_FILE = "/cache/recovery/last_install";
static const char *CACHE_ROOT = "/cache";
static const char *SDCARD_ROOT = "/sdcard";
static const char *TEMPORARY_LOG_FILE = "/tmp/recovery.log";
static const char *TEMPORARY_INSTALL_FILE = "/tmp/last_install";
// 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);
}
static void copy_log_file(const char* source, const char* destination, int append) {
FILE *log = fopen_path(destination, append ? "a" : "w");
if (log == NULL) {
LOGE("Can't open %s\n", destination);
} else {
FILE *tmplog = fopen(source, "r");
if (tmplog != NULL) {
if (append) {
fseek(tmplog, tmplog_offset, SEEK_SET); // Since last write
}
char buf[4096];
while (fgets(buf, sizeof(buf), tmplog)) fputs(buf, log);
if (append) {
tmplog_offset = ftell(tmplog);
}
check_and_fclose(tmplog, source);
}
check_and_fclose(log, destination);
}
}
// 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.
void twfinish_recovery(const char *send_intent) {
// By this point, we're ready to return to the main system...
if (send_intent != NULL) {
FILE *fp = fopen_path(INTENT_FILE, "w");
if (fp == NULL) {
LOGE("Can't open %s\n", INTENT_FILE);
} else {
fputs(send_intent, fp);
check_and_fclose(fp, INTENT_FILE);
}
}
// Copy logs to cache so the system can find out what happened.
copy_log_file(TEMPORARY_LOG_FILE, LOG_FILE, true);
copy_log_file(TEMPORARY_LOG_FILE, LAST_LOG_FILE, false);
copy_log_file(TEMPORARY_INSTALL_FILE, LAST_INSTALL_FILE, false);
chmod(LOG_FILE, 0600);
chown(LOG_FILE, 1000, 1000); // system user
chmod(LAST_LOG_FILE, 0640);
chmod(LAST_INSTALL_FILE, 0644);
// Reset to normal system boot so recovery won't cycle indefinitely.
struct bootloader_message boot;
memset(&boot, 0, sizeof(boot));
set_bootloader_message(&boot);
// Remove the command file, so recovery won't repeat indefinitely.
if (system("mount /cache") != 0 ||
(unlink(COMMAND_FILE) && errno != ENOENT)) {
LOGW("Can't unlink %s\n", COMMAND_FILE);
}
system("umount /cache");
sync(); // For good measure.
}
