/*
* 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 <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <paths.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 <ctype.h>
#include "cutils/misc.h"
#include "cutils/properties.h"
#include <dirent.h>
#include <getopt.h>
#include <linux/input.h>
#include <signal.h>
#include <sys/limits.h>
#include <termios.h>
#include <time.h>
#include <sys/vfs.h>
#include "tw_reboot.h"
#include "bootloader.h"
#include "common.h"
#include "extra-functions.h"
#include "minuitwrp/minui.h"
#include "minzip/DirUtil.h"
#include "minzip/Zip.h"
#include "recovery_ui.h"
#include "roots.h"
#include "data.h"
#include "variables.h"
#include "mincrypt/rsa.h"
#include "verifier.h"
#include "mincrypt/sha.h"
#ifndef PUBLIC_KEYS_FILE
#define PUBLIC_KEYS_FILE "/res/keys"
#endif
#ifndef ASSUMED_UPDATE_BINARY_NAME
#define ASSUMED_UPDATE_BINARY_NAME "META-INF/com/google/android/update-binary"
#endif
enum { INSTALL_SUCCESS, INSTALL_ERROR, INSTALL_CORRUPT };
//kang system() from bionic/libc/unistd and rename it __system() so we can be even more hackish :)
#undef _PATH_BSHELL
#define _PATH_BSHELL "/sbin/sh"
extern char **environ;
int __system(const char *command) {
pid_t pid;
sig_t intsave, quitsave;
sigset_t mask, omask;
int pstat;
char *argp[] = {"sh", "-c", NULL, NULL};
if (!command) /* just checking... */
return(1);
argp[2] = (char *)command;
sigemptyset(&mask);
sigaddset(&mask, SIGCHLD);
sigprocmask(SIG_BLOCK, &mask, &omask);
switch (pid = vfork()) {
case -1: /* error */
sigprocmask(SIG_SETMASK, &omask, NULL);
return(-1);
case 0: /* child */
sigprocmask(SIG_SETMASK, &omask, NULL);
execve(_PATH_BSHELL, argp, environ);
_exit(127);
}
intsave = (sig_t) bsd_signal(SIGINT, SIG_IGN);
quitsave = (sig_t) bsd_signal(SIGQUIT, SIG_IGN);
pid = waitpid(pid, (int *)&pstat, 0);
sigprocmask(SIG_SETMASK, &omask, NULL);
(void)bsd_signal(SIGINT, intsave);
(void)bsd_signal(SIGQUIT, quitsave);
return (pid == -1 ? -1 : pstat);
}
static struct pid {
struct pid *next;
FILE *fp;
pid_t pid;
} *pidlist;
FILE *__popen(const char *program, const char *type) {
struct pid * volatile cur;
FILE *iop;
int pdes[2];
pid_t pid;
if ((*type != 'r' && *type != 'w') || type[1] != '\0') {
errno = EINVAL;
return (NULL);
}
if ((cur = malloc(sizeof(struct pid))) == NULL)
return (NULL);
if (pipe(pdes) < 0) {
free(cur);
return (NULL);
}
switch (pid = vfork()) {
case -1: /* Error. */
(void)close(pdes[0]);
(void)close(pdes[1]);
free(cur);
return (NULL);
/* NOTREACHED */
case 0: /* Child. */
{
struct pid *pcur;
/*
* because vfork() instead of fork(), must leak FILE *,
* but luckily we are terminally headed for an execl()
*/
for (pcur = pidlist; pcur; pcur = pcur->next)
close(fileno(pcur->fp));
if (*type == 'r') {
int tpdes1 = pdes[1];
(void) close(pdes[0]);
/*
* We must NOT modify pdes, due to the
* semantics of vfork.
*/
if (tpdes1 != STDOUT_FILENO) {
(void)dup2(tpdes1, STDOUT_FILENO);
(void)close(tpdes1);
tpdes1 = STDOUT_FILENO;
}
} else {
(void)close(pdes[1]);
if (pdes[0] != STDIN_FILENO) {
(void)dup2(pdes[0], STDIN_FILENO);
(void)close(pdes[0]);
}
}
execl(_PATH_BSHELL, "sh", "-c", program, (char *)NULL);
_exit(127);
/* NOTREACHED */
}
}
/* Parent; assume fdopen can't fail. */
if (*type == 'r') {
iop = fdopen(pdes[0], type);
(void)close(pdes[1]);
} else {
iop = fdopen(pdes[1], type);
(void)close(pdes[0]);
}
/* Link into list of file descriptors. */
cur->fp = iop;
cur->pid = pid;
cur->next = pidlist;
pidlist = cur;
return (iop);
}
/*
* pclose --
* Pclose returns -1 if stream is not associated with a `popened' command,
* if already `pclosed', or waitpid returns an error.
*/
int __pclose(FILE *iop) {
struct pid *cur, *last;
int pstat;
pid_t pid;
/* Find the appropriate file pointer. */
for (last = NULL, cur = pidlist; cur; last = cur, cur = cur->next)
if (cur->fp == iop)
break;
if (cur == NULL)
return (-1);
(void)fclose(iop);
do {
pid = waitpid(cur->pid, &pstat, 0);
} while (pid == -1 && errno == EINTR);
/* Remove the entry from the linked list. */
if (last == NULL)
pidlist = cur->next;
else
last->next = cur->next;
free(cur);
return (pid == -1 ? -1 : pstat);
}
//partial kangbang from system/vold
#ifndef CUSTOM_LUN_FILE
#define CUSTOM_LUN_FILE "/sys/devices/platform/usb_mass_storage/lun%d/file"
#endif
int usb_storage_enable(void)
{
int fd;
char lun_file[255];
if (DataManager_GetIntValue(TW_HAS_DUAL_STORAGE) == 1 && DataManager_GetIntValue(TW_HAS_DATA_MEDIA) == 0) {
Volume *vol = volume_for_path(DataManager_GetSettingsStoragePath());
if (!vol)
{
LOGE("Unable to locate volume information.");
return -1;
}
sprintf(lun_file, CUSTOM_LUN_FILE, 0);
if ((fd = open(lun_file, O_WRONLY)) < 0)
{
LOGE("Unable to open ums lunfile '%s': (%s)\n", lun_file, strerror(errno));
return -1;
}
if ((write(fd, vol->device, strlen(vol->device)) < 0) &&
(!vol->device2 || (write(fd, vol->device, strlen(vol->device2)) < 0))) {
LOGE("Unable to write to ums lunfile '%s': (%s)\n", lun_file, strerror(errno));
close(fd);
return -1;
}
close(fd);
Volume *vol2 = volume_for_path(DataManager_GetStrValue(TW_EXTERNAL_PATH));
if (!vol)
{
LOGE("Unable to locate volume information.\n");
return -1;
}
sprintf(lun_file, CUSTOM_LUN_FILE, 1);
if ((fd = open(lun_file, O_WRONLY)) < 0)
{
LOGE("Unable to open ums lunfile '%s': (%s)\n", lun_file, strerror(errno));
return -1;
}
if ((write(fd, vol2->device, strlen(vol2->device)) < 0) &&
(!vol2->device2 || (write(fd, vol2->device, strlen(vol2->device2)) < 0))) {
LOGE("Unable to write to ums lunfile '%s': (%s)\n", lun_file, strerror(errno));
close(fd);
return -1;
}
close(fd);
} else {
if (DataManager_GetIntValue(TW_HAS_DATA_MEDIA) == 0)
strcpy(lun_file, DataManager_GetCurrentStoragePath());
else
strcpy(lun_file, DataManager_GetStrValue(TW_EXTERNAL_PATH));
Volume *vol = volume_for_path(lun_file);
if (!vol)
{
LOGE("Unable to locate volume information.\n");
return -1;
}
sprintf(lun_file, CUSTOM_LUN_FILE, 0);
if ((fd = open(lun_file, O_WRONLY)) < 0)
{
LOGE("Unable to open ums lunfile '%s': (%s)\n", lun_file, strerror(errno));
return -1;
}
if ((write(fd, vol->device, strlen(vol->device)) < 0) &&
(!vol->device2 || (write(fd, vol->device, strlen(vol->device2)) < 0))) {
LOGE("Unable to write to ums lunfile '%s': (%s)\n", lun_file, strerror(errno));
close(fd);
return -1;
}
close(fd);
}
return 0;
}
int usb_storage_disable(void)
{
int fd, index;
char lun_file[255];
for (index=0; index<2; index++) {
sprintf(lun_file, CUSTOM_LUN_FILE, index);
if ((fd = open(lun_file, O_WRONLY)) < 0)
{
if (index == 0)
LOGE("Unable to open ums lunfile '%s': (%s)", lun_file, strerror(errno));
return -1;
}
char ch = 0;
if (write(fd, &ch, 1) < 0)
{
if (index == 0)
LOGE("Unable to write to ums lunfile '%s': (%s)", lun_file, strerror(errno));
close(fd);
return -1;
}
close(fd);
}
return 0;
}
void update_tz_environment_variables() {
setenv("TZ", DataManager_GetStrValue(TW_TIME_ZONE_VAR), 1);
tzset();
}
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_clear_key_queue();
ui_print("\nPress Power to confirm,");
ui_print("\nany other key to abort.\n");
int confirm;
/*if (request_confirm) // this option is used to skip the confirmation when the gui is in use
confirm = ui_wait_key();
else*/
confirm = KEY_POWER;
if (confirm == BTN_MOUSE || confirm == KEY_POWER || confirm == SELECT_ITEM) {
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);
}
} else {
ui_print("%s", str7);
}
//if (!ui_text_visible()) return;
}
void check_and_run_script(const char* script_file, const char* display_name)
{
// Check for and run startup script if script exists
struct statfs st;
if (statfs(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 statfs 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 >= 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
// 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 (statfs(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 (ensure_path_mounted(COMMAND_FILE) != 0 ||
(unlink(COMMAND_FILE) && errno != ENOENT)) {
LOGW("Can't unlink %s\n", COMMAND_FILE);
}
ensure_path_unmounted(CACHE_ROOT);
sync(); // For good measure.
}
