twrp.cpp

/*
        Copyright 2013 bigbiff/Dees_Troy TeamWin
        This file is part of TWRP/TeamWin Recovery Project.

        TWRP is free software: you can redistribute it and/or modify
        it under the terms of the GNU General Public License as published by
        the Free Software Foundation, either version 3 of the License, or
        (at your option) any later version.

        TWRP is distributed in the hope that it will be useful,
        but WITHOUT ANY WARRANTY; without even the implied warranty of
        MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        GNU General Public License for more details.

        You should have received a copy of the GNU General Public License
        along with TWRP.  If not, see <http://www.gnu.org/licenses/>.
*/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <time.h>
#include <unistd.h>

#include "cutils/properties.h"
extern "C" {
#include "minadbd/adb.h"
}

#ifdef ANDROID_RB_RESTART
#include "cutils/android_reboot.h"
#else
#include <sys/reboot.h>
#endif

extern "C" {
#include "gui/gui.h"
}
#include "twcommon.h"
#include "twrp-functions.hpp"
#include "data.hpp"
#include "partitions.hpp"
#include "openrecoveryscript.hpp"
#include "variables.h"

TWPartitionManager PartitionManager;
int Log_Offset;

static void Print_Prop(const char *key, const char *name, void *cookie) {
	printf("%s=%s\n", key, name);
}

int main(int argc, char **argv) {
	// Recovery needs to install world-readable files, so clear umask
	// set by init
	umask(0);

	Log_Offset = 0;

	// Set up temporary log file (/tmp/recovery.log)
	freopen(TMP_LOG_FILE, "a", stdout);
	setbuf(stdout, NULL);
	freopen(TMP_LOG_FILE, "a", stderr);
	setbuf(stderr, NULL);
	
	// Handle ADB sideload
	if (argc == 3 && strcmp(argv[1], "--adbd") == 0) {
		adb_main(argv[2]);
		return 0;
	}

	time_t StartupTime = time(NULL);
	printf("Starting TWRP %s on %s", TW_VERSION_STR, ctime(&StartupTime));

	// Load default values to set DataManager constants and handle ifdefs
	DataManager::SetDefaultValues();
	printf("Starting the UI...");
	gui_init();
	printf("=> Linking mtab\n");
	symlink("/proc/mounts", "/etc/mtab");
	printf("=> Processing recovery.fstab\n");
	if (!PartitionManager.Process_Fstab("/etc/recovery.fstab", 1)) {
		LOGERR("Failing out of recovery due to problem with recovery.fstab.\n");
		return -1;
	}
	PartitionManager.Output_Partition_Logging();
	// Load up all the resources
	gui_loadResources();

	PartitionManager.Mount_By_Path("/cache", true);

    string Zip_File, Reboot_Value;
	bool Cache_Wipe = false, Factory_Reset = false, Perform_Backup = false;

	int index, index2;
	char* ptr;
	printf("Startup Commands: ");
	for (index = 1; index < argc; index++) {
		printf(" '%s'", argv[index]);
		if (*argv[index] == 'u') {
			ptr = argv[index];
			index2 = 0;
			while (*ptr != '=' && *ptr != '\n')
				ptr++;
			if (*ptr) {
				Zip_File = ptr;
			} else
				LOGERR("argument error specifying zip file\n");
		} else if (*argv[index] == 'c') {
			Cache_Wipe = true;
		} else if (*argv[index] == 'w') {
			Factory_Reset = true;
		} else if (*argv[index] == 'n') {
			Perform_Backup = true;
		} else if (*argv[index] == 's') {
			ptr = argv[index];
			index2 = 0;
			while (*ptr != '=' && *ptr != '\n')
				ptr++;
			if (*ptr) {
				Reboot_Value = *ptr;
			}
		}
	}

    char twrp_booted[PROPERTY_VALUE_MAX];
	property_get("ro.twrp.boot", twrp_booted, "0");
	if (strcmp(twrp_booted, "0") == 0) {
		property_list(Print_Prop, NULL);
		printf("\n");
		property_set("ro.twrp.boot", "1");
	}

	// Check for and run startup script if script exists
	TWFunc::check_and_run_script("/sbin/runatboot.sh", "boot");
	TWFunc::check_and_run_script("/sbin/postrecoveryboot.sh", "boot");

#ifdef TW_INCLUDE_INJECTTWRP
	// Back up TWRP Ramdisk if needed:
	TWPartition* Boot = PartitionManager.Find_Partition_By_Path("/boot");
	string result;
	LOGINFO("Backing up TWRP ramdisk...\n");
	if (Boot == NULL || Boot->Current_File_System != "emmc")
		TWFunc::Exec_Cmd("injecttwrp --backup /tmp/backup_recovery_ramdisk.img", result);
	else {
		string injectcmd = "injecttwrp --backup /tmp/backup_recovery_ramdisk.img bd=" + Boot->Actual_Block_Device;
		TWFunc::Exec_Cmd(injectcmd, result);
	}
	LOGINFO("Backup of TWRP ramdisk done.\n");
#endif

	bool Keep_Going = true;
	if (Perform_Backup) {
		DataManager::SetValue(TW_BACKUP_NAME, "(Current Date)");
		if (!OpenRecoveryScript::Insert_ORS_Command("backup BSDCAE\n"))
			Keep_Going = false;
	}
	if (Keep_Going && !Zip_File.empty()) {
		string ORSCommand = "install " + Zip_File;

		if (!OpenRecoveryScript::Insert_ORS_Command(ORSCommand))
			Keep_Going = false;
	}
	if (Keep_Going) {
		if (Factory_Reset) {
			if (!OpenRecoveryScript::Insert_ORS_Command("wipe data\n"))
				Keep_Going = false;
		} else if (Cache_Wipe) {
			if (!OpenRecoveryScript::Insert_ORS_Command("wipe cache\n"))
				Keep_Going = false;
		}
	}

	TWFunc::Update_Log_File();
	// Offer to decrypt if the device is encrypted
	if (DataManager::GetIntValue(TW_IS_ENCRYPTED) != 0) {
		LOGINFO("Is encrypted, do decrypt page first\n");
		if (gui_startPage("decrypt") != 0) {
			LOGERR("Failed to start decrypt GUI page.\n");
		}
	}

	// Read the settings file
	DataManager::ReadSettingsFile();
	// Run any outstanding OpenRecoveryScript
	if (DataManager::GetIntValue(TW_IS_ENCRYPTED) == 0 && (TWFunc::Path_Exists(SCRIPT_FILE_TMP) || TWFunc::Path_Exists(SCRIPT_FILE_CACHE))) {
		OpenRecoveryScript::Run_OpenRecoveryScript();
	}
	// Launch the main GUI
	gui_start();

	// Check for su to see if the device is rooted or not
	if (PartitionManager.Mount_By_Path("/system", false)) {
		// Disable flashing of stock recovery
		if (TWFunc::Path_Exists("/system/recovery-from-boot.p")) {
			rename("/system/recovery-from-boot.p", "/system/recovery-from-boot.bak");
			gui_print("Renamed stock recovery file in /system to prevent\nthe stock ROM from replacing TWRP.\n");
		}
		if (TWFunc::Path_Exists("/supersu/su") && !TWFunc::Path_Exists("/system/bin/su") && !TWFunc::Path_Exists("/system/xbin/su") && !TWFunc::Path_Exists("/system/bin/.ext/.su")) {
			// Device doesn't have su installed
			DataManager::SetValue("tw_busy", 1);
			if (gui_startPage("installsu") != 0) {
				LOGERR("Failed to start decrypt GUI page.\n");
			}
		} else if (TWFunc::Check_su_Perms() > 0) {
			// su perms are set incorrectly
			DataManager::SetValue("tw_busy", 1);
			if (gui_startPage("fixsu") != 0) {
				LOGERR("Failed to start decrypt GUI page.\n");
			}
		}
		sync();
		PartitionManager.UnMount_By_Path("/system", false);
	}

    // Reboot
	TWFunc::Update_Intent_File(Reboot_Value);
    TWFunc::Update_Log_File();
    gui_print("Rebooting...\n");
	string Reboot_Arg;
	DataManager::GetValue("tw_reboot_arg", Reboot_Arg);
	if (Reboot_Arg == "recovery")
		TWFunc::tw_reboot(rb_recovery);
	else if (Reboot_Arg == "poweroff")
		TWFunc::tw_reboot(rb_poweroff);
	else if (Reboot_Arg == "bootloader")
		TWFunc::tw_reboot(rb_bootloader);
	else if (Reboot_Arg == "download")
		TWFunc::tw_reboot(rb_download);
	else
		TWFunc::tw_reboot(rb_system);

#ifdef ANDROID_RB_RESTART
    android_reboot(ANDROID_RB_RESTART, 0, 0);
#else
	reboot(RB_AUTOBOOT);
#endif
    return 0;
}