199 lines
6.5 KiB
C
199 lines
6.5 KiB
C
/*
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* Copyright (C) 2011 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <unistd.h>
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#include <linux/input.h>
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#include "bootloader.h"
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#include "common.h"
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#include "extra-functions.h"
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#include "data.h"
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#include "variables.h"
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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)
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{
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ui_print("%s", str1);
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ui_print("%s", str2);
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pid_t pid = fork();
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if (pid == 0) {
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char *args[] = { "/sbin/sh", "-c", (char*)str3, "1>&2", NULL };
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execv("/sbin/sh", args);
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fprintf(stderr, str4, strerror(errno));
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_exit(-1);
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}
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int status;
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while (waitpid(pid, &status, WNOHANG) == 0) {
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ui_print(".");
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sleep(1);
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}
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ui_print("\n");
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if (!WIFEXITED(status) || (WEXITSTATUS(status) != 0)) {
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ui_print("%s", str5);
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} else {
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ui_print("%s", str6);
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}
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}
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void check_and_run_script(const char* script_file, const char* display_name)
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{
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// Check for and run startup script if script exists
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struct stat st;
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if (stat(script_file, &st) == 0) {
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ui_print("Running %s script...\n", display_name);
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char command[255];
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strcpy(command, "chmod 755 ");
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strcat(command, script_file);
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system(command);
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system(script_file);
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ui_print("\nFinished running %s script.\n", display_name);
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}
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}
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int check_backup_name(int show_error) {
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// Check the backup name to ensure that it is the correct size and contains only valid characters
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// and that a backup with that name doesn't already exist
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char backup_name[MAX_BACKUP_NAME_LEN];
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char backup_loc[255], tw_image_dir[255];
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int copy_size = strlen(DataManager_GetStrValue(TW_BACKUP_NAME));
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int index, cur_char;
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struct stat st;
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// Check size
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if (copy_size > MAX_BACKUP_NAME_LEN) {
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if (show_error)
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LOGE("Backup name is too long.\n");
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return -2;
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}
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// Check characters
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strncpy(backup_name, DataManager_GetStrValue(TW_BACKUP_NAME), copy_size);
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if (strcmp(backup_name, "0") == 0)
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return 0; // A "0" (zero) means to use the current timestamp for the backup name
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for (index=0; index<copy_size; index++) {
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cur_char = (int)backup_name[index];
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if ((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) {
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// These are valid characters
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// Numbers
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// Upper case letters
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// Lower case letters
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// and -_.{}[]
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} else {
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if (show_error)
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LOGE("Backup name '%s' contains invalid character: '%c'\n", backup_name, (char)cur_char);
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return -3;
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}
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}
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// Check to make sure that a backup with this name doesn't already exist
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strcpy(backup_loc, DataManager_GetStrValue(TW_BACKUPS_FOLDER_VAR));
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sprintf(tw_image_dir,"%s/%s/.", backup_loc, backup_name);
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if (stat(tw_image_dir, &st) == 0) {
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if (show_error)
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LOGE("A backup with this name already exists.\n");
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return -4;
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}
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// No problems found, return 0
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return 0;
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}
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static const char *COMMAND_FILE = "/cache/recovery/command";
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static const char *INTENT_FILE = "/cache/recovery/intent";
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static const char *LOG_FILE = "/cache/recovery/log";
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static const char *LAST_LOG_FILE = "/cache/recovery/last_log";
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static const char *LAST_INSTALL_FILE = "/cache/recovery/last_install";
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static const char *CACHE_ROOT = "/cache";
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static const char *SDCARD_ROOT = "/sdcard";
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static const char *TEMPORARY_LOG_FILE = "/tmp/recovery.log";
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static const char *TEMPORARY_INSTALL_FILE = "/tmp/last_install";
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// close a file, log an error if the error indicator is set
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static void check_and_fclose(FILE *fp, const char *name) {
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fflush(fp);
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if (ferror(fp)) LOGE("Error in %s\n(%s)\n", name, strerror(errno));
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fclose(fp);
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}
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static void copy_log_file(const char* source, const char* destination, int append) {
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FILE *log = fopen_path(destination, append ? "a" : "w");
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if (log == NULL) {
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LOGE("Can't open %s\n", destination);
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} else {
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FILE *tmplog = fopen(source, "r");
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if (tmplog != NULL) {
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if (append) {
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fseek(tmplog, tmplog_offset, SEEK_SET); // Since last write
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}
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char buf[4096];
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while (fgets(buf, sizeof(buf), tmplog)) fputs(buf, log);
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if (append) {
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tmplog_offset = ftell(tmplog);
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}
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check_and_fclose(tmplog, source);
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}
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check_and_fclose(log, destination);
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}
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}
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// clear the recovery command and prepare to boot a (hopefully working) system,
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// copy our log file to cache as well (for the system to read), and
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// record any intent we were asked to communicate back to the system.
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// this function is idempotent: call it as many times as you like.
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void twfinish_recovery(const char *send_intent) {
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// By this point, we're ready to return to the main system...
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if (send_intent != NULL) {
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FILE *fp = fopen_path(INTENT_FILE, "w");
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if (fp == NULL) {
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LOGE("Can't open %s\n", INTENT_FILE);
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} else {
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fputs(send_intent, fp);
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check_and_fclose(fp, INTENT_FILE);
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}
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}
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// Copy logs to cache so the system can find out what happened.
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copy_log_file(TEMPORARY_LOG_FILE, LOG_FILE, true);
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copy_log_file(TEMPORARY_LOG_FILE, LAST_LOG_FILE, false);
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copy_log_file(TEMPORARY_INSTALL_FILE, LAST_INSTALL_FILE, false);
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chmod(LOG_FILE, 0600);
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chown(LOG_FILE, 1000, 1000); // system user
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chmod(LAST_LOG_FILE, 0640);
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chmod(LAST_INSTALL_FILE, 0644);
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// Reset to normal system boot so recovery won't cycle indefinitely.
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struct bootloader_message boot;
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memset(&boot, 0, sizeof(boot));
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set_bootloader_message(&boot);
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// Remove the command file, so recovery won't repeat indefinitely.
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if (system("mount /cache") != 0 ||
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(unlink(COMMAND_FILE) && errno != ENOENT)) {
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LOGW("Can't unlink %s\n", COMMAND_FILE);
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}
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system("umount /cache");
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sync(); // For good measure.
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}
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