twrp.cpp - android_bootable_recovery - Gitiles

 /*

 ccdd
 		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"
 #include "bootloader.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"
 #include "twrpDU.hpp"

 #ifdef HAVE_SELINUX
 #include "selinux/label.h"
 struct selabel_handle *selinux_handle;
 #endif

 TWPartitionManager PartitionManager;
 int Log_Offset;
 twrpDU du;

 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");
 	if (TWFunc::Path_Exists("/etc/twrp.fstab")) {
 		if (TWFunc::Path_Exists("/etc/recovery.fstab")) {
 			printf("Renaming regular /etc/recovery.fstab -> /etc/recovery.fstab.bak\n");
 			rename("/etc/recovery.fstab", "/etc/recovery.fstab.bak");
 		}
 		printf("Moving /etc/twrp.fstab -> /etc/recovery.fstab\n");
 		rename("/etc/twrp.fstab", "/etc/recovery.fstab");
 	}
 	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();

 #ifdef HAVE_SELINUX
 	if (TWFunc::Path_Exists("/prebuilt_file_contexts")) {
 		if (TWFunc::Path_Exists("/file_contexts")) {
 			printf("Renaming regular /file_contexts -> /file_contexts.bak\n");
 			rename("/file_contexts", "/file_contexts.bak");
 		}
 		printf("Moving /prebuilt_file_contexts -> /file_contexts\n");
 		rename("/prebuilt_file_contexts", "/file_contexts");
 	}
 	struct selinux_opt selinux_options[] = {
 		{ SELABEL_OPT_PATH, "/file_contexts" }
 	};
 	selinux_handle = selabel_open(SELABEL_CTX_FILE, selinux_options, 1);
 	if (!selinux_handle)
 		printf("No file contexts for SELinux\n");
 	else
 		printf("SELinux contexts loaded from /file_contexts\n");
 	{ // Check to ensure SELinux can be supported by the kernel
 		char *contexts = NULL;

 		if (PartitionManager.Mount_By_Path("/cache", true) && TWFunc::Path_Exists("/cache/recovery")) {
 			lgetfilecon("/cache/recovery", &contexts);
 			if (!contexts) {
 				lsetfilecon("/cache/recovery", "test");
 				lgetfilecon("/cache/recovery", &contexts);
 			}
 		} else {
 			LOGINFO("Could not check /cache/recovery SELinux contexts, using /sbin/teamwin instead which may be inaccurate.\n");
 			lgetfilecon("/sbin/teamwin", &contexts);
 		}
 		if (!contexts) {
 			gui_print("Kernel does not have support for reading SELinux contexts.\n");
 		} else {
 			free(contexts);
 			gui_print("Full SELinux support is present.\n");
 		}
 	}
 #else
 	gui_print("No SELinux support (no libselinux).\n");
 #endif

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

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

 	{
 		TWPartition* misc = PartitionManager.Find_Partition_By_Path("/misc");
 		if (misc != NULL) {
 			if (misc->Current_File_System == "emmc") {
 				set_device_type('e');
 				set_device_name(misc->Actual_Block_Device.c_str());
 			} else if (misc->Current_File_System == "mtd") {
 				set_device_type('m');
 				set_device_name(misc->MTD_Name.c_str());
 			} else {
 				LOGERR("Unknown file system for /misc\n");
 			}
 		}
 		get_args(&argc, &argv);

 		int index, index2, len;
 		char* argptr;
 		char* ptr;
 		printf("Startup Commands: ");
 		for (index = 1; index < argc; index++) {
 			argptr = argv[index];
 			printf(" '%s'", argv[index]);
 			len = strlen(argv[index]);
 			if (*argptr == '-') {argptr++; len--;}
 			if (*argptr == '-') {argptr++; len--;}
 			if (*argptr == 'u') {
 				ptr = argptr;
 				index2 = 0;
 				while (*ptr != '=' && *ptr != '\n')
 					ptr++;
 				// skip the = before grabbing Zip_File
 				while (*ptr == '=')
 					ptr++;
 				if (*ptr) {
 					Zip_File = ptr;
 				} else
 					LOGERR("argument error specifying zip file\n");
 			} else if (*argptr == 'w') {
 				if (len == 9)
 					Factory_Reset = true;
 				else if (len == 10)
 					Cache_Wipe = true;
 			} else if (*argptr == 'n') {
 				Perform_Backup = true;
 			} else if (*argptr == 's') {
 				ptr = argptr;
 				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");
 	LOGINFO("Backing up TWRP ramdisk...\n");
 	if (Boot == NULL || Boot->Current_File_System != "emmc")
 		TWFunc::Exec_Cmd("injecttwrp --backup /tmp/backup_recovery_ramdisk.img");
 	else {
 		string injectcmd = "injecttwrp --backup /tmp/backup_recovery_ramdisk.img bd=" + Boot->Actual_Block_Device;
 		TWFunc::Exec_Cmd(injectcmd);
 	}
 	LOGINFO("Backup of TWRP ramdisk done.\n");
 #endif

 	bool Keep_Going = true;
 	if (Perform_Backup) {
 		DataManager::SetValue(TW_BACKUP_NAME, "(Auto Generate)");
 		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();
 	}

 	TWFunc::Fixup_Time_On_Boot();

 	// 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 SuperSU install page.\n");
 			}
 		} else if (TWFunc::Check_su_Perms() > 0) {
 			// su perms are set incorrectly
 			LOGINFO("Root permissions appear to be lost... fixing. (This will always happen on 4.3+ ROMs with SELinux.\n");
 			TWFunc::Fix_su_Perms();
 		}
 		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;
 }
	/*

	ccdd
	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"
	#include "bootloader.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"
	#include "twrpDU.hpp"

	#ifdef HAVE_SELINUX
	#include "selinux/label.h"
	struct selabel_handle *selinux_handle;
	#endif

	TWPartitionManager PartitionManager;
	int Log_Offset;
	twrpDU du;

	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");
	if (TWFunc::Path_Exists("/etc/twrp.fstab")) {
	if (TWFunc::Path_Exists("/etc/recovery.fstab")) {
	printf("Renaming regular /etc/recovery.fstab -> /etc/recovery.fstab.bak\n");
	rename("/etc/recovery.fstab", "/etc/recovery.fstab.bak");
	}
	printf("Moving /etc/twrp.fstab -> /etc/recovery.fstab\n");
	rename("/etc/twrp.fstab", "/etc/recovery.fstab");
	}
	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();

	#ifdef HAVE_SELINUX
	if (TWFunc::Path_Exists("/prebuilt_file_contexts")) {
	if (TWFunc::Path_Exists("/file_contexts")) {
	printf("Renaming regular /file_contexts -> /file_contexts.bak\n");
	rename("/file_contexts", "/file_contexts.bak");
	}
	printf("Moving /prebuilt_file_contexts -> /file_contexts\n");
	rename("/prebuilt_file_contexts", "/file_contexts");
	}
	struct selinux_opt selinux_options[] = {
	{ SELABEL_OPT_PATH, "/file_contexts" }
	};
	selinux_handle = selabel_open(SELABEL_CTX_FILE, selinux_options, 1);
	if (!selinux_handle)
	printf("No file contexts for SELinux\n");
	else
	printf("SELinux contexts loaded from /file_contexts\n");
	{ // Check to ensure SELinux can be supported by the kernel
	char *contexts = NULL;

	if (PartitionManager.Mount_By_Path("/cache", true) && TWFunc::Path_Exists("/cache/recovery")) {
	lgetfilecon("/cache/recovery", &contexts);
	if (!contexts) {
	lsetfilecon("/cache/recovery", "test");
	lgetfilecon("/cache/recovery", &contexts);
	}
	} else {
	LOGINFO("Could not check /cache/recovery SELinux contexts, using /sbin/teamwin instead which may be inaccurate.\n");
	lgetfilecon("/sbin/teamwin", &contexts);
	}
	if (!contexts) {
	gui_print("Kernel does not have support for reading SELinux contexts.\n");
	} else {
	free(contexts);
	gui_print("Full SELinux support is present.\n");
	}
	}
	#else
	gui_print("No SELinux support (no libselinux).\n");
	#endif

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

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

	{
	TWPartition* misc = PartitionManager.Find_Partition_By_Path("/misc");
	if (misc != NULL) {
	if (misc->Current_File_System == "emmc") {
	set_device_type('e');
	set_device_name(misc->Actual_Block_Device.c_str());
	} else if (misc->Current_File_System == "mtd") {
	set_device_type('m');
	set_device_name(misc->MTD_Name.c_str());
	} else {
	LOGERR("Unknown file system for /misc\n");
	}
	}
	get_args(&argc, &argv);

	int index, index2, len;
	char* argptr;
	char* ptr;
	printf("Startup Commands: ");
	for (index = 1; index < argc; index++) {
	argptr = argv[index];
	printf(" '%s'", argv[index]);
	len = strlen(argv[index]);
	if (*argptr == '-') {argptr++; len--;}
	if (*argptr == '-') {argptr++; len--;}
	if (*argptr == 'u') {
	ptr = argptr;
	index2 = 0;
	while (ptr != '=' && ptr != '\n')
	ptr++;
	// skip the = before grabbing Zip_File
	while (*ptr == '=')
	ptr++;
	if (*ptr) {
	Zip_File = ptr;
	} else
	LOGERR("argument error specifying zip file\n");
	} else if (*argptr == 'w') {
	if (len == 9)
	Factory_Reset = true;
	else if (len == 10)
	Cache_Wipe = true;
	} else if (*argptr == 'n') {
	Perform_Backup = true;
	} else if (*argptr == 's') {
	ptr = argptr;
	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");
	LOGINFO("Backing up TWRP ramdisk...\n");
	if (Boot == NULL \|\| Boot->Current_File_System != "emmc")
	TWFunc::Exec_Cmd("injecttwrp --backup /tmp/backup_recovery_ramdisk.img");
	else {
	string injectcmd = "injecttwrp --backup /tmp/backup_recovery_ramdisk.img bd=" + Boot->Actual_Block_Device;
	TWFunc::Exec_Cmd(injectcmd);
	}
	LOGINFO("Backup of TWRP ramdisk done.\n");
	#endif

	bool Keep_Going = true;
	if (Perform_Backup) {
	DataManager::SetValue(TW_BACKUP_NAME, "(Auto Generate)");
	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();
	}

	TWFunc::Fixup_Time_On_Boot();

	// 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 SuperSU install page.\n");
	}
	} else if (TWFunc::Check_su_Perms() > 0) {
	// su perms are set incorrectly
	LOGINFO("Root permissions appear to be lost... fixing. (This will always happen on 4.3+ ROMs with SELinux.\n");
	TWFunc::Fix_su_Perms();
	}
	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;
	}