twrp-functions.cpp - android_bootable_recovery - Gitiles

 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <sys/stat.h>
 #include <sys/vfs.h>
 #include <unistd.h>
 #include <vector>
 #include <dirent.h>
 #include <time.h>
 #include <errno.h>
 #include <sys/reboot.h>

 #include "twrp-functions.hpp"
 #include "partitions.hpp"
 #include "common.h"
 #include "data.hpp"
 #include "bootloader.h"
 #include "variables.h"

 /*  Checks md5 for a path
     Return values:
         -1 : MD5 does not exist
         0 : Failed
         1 : Success */
 int TWFunc::Check_MD5(string File) {
 	int ret;
 	string Command, DirPath, MD5_File, Sline, Filename, MD5_File_Filename, OK;
 	char line[255];
 	size_t pos;

 	MD5_File = File + ".md5";
 	if (Path_Exists(MD5_File)) {
 		DirPath = Get_Path(File);
 		MD5_File = Get_Filename(MD5_File);
 		Command = "cd '" + DirPath + "' && /sbin/busybox md5sum -c '" + MD5_File + "' > /tmp/md5output";
 		system(Command.c_str());
 		FILE * cs = fopen("/tmp/md5output", "r");
 		if (cs == NULL) {
 			LOGE("Unable to open md5 output file.\n");
 			return 0;
 		}

 		fgets(line, sizeof(line), cs);
 		fclose(cs);

 		Sline = line;
 		pos = Sline.find(":");
 		if (pos != string::npos) {
 			Filename = Get_Filename(File);
 			MD5_File_Filename = Sline.substr(0, pos);
 			OK = Sline.substr(pos + 2, Sline.size() - pos - 2);
 			if (Filename == MD5_File_Filename && (OK == "OK" || OK == "OK\n")) {
 				//MD5 is good, return 1
 				ret = 1;
 			} else {
 				// MD5 is bad, return 0
 				ret = 0;
 			}
 		} else {
 			// MD5 is bad, return 0
 			ret = 0;
 		}
 	} else {
 		//No md5 file, return -1
 		ret = -1;
 	}

     return ret;
 }

 // Returns "file.name" from a full /path/to/file.name
 string TWFunc::Get_Filename(string Path) {
 	size_t pos = Path.find_last_of("/");
 	if (pos != string::npos) {
 		string Filename;
 		Filename = Path.substr(pos + 1, Path.size() - pos - 1);
 		return Filename;
 	} else
 		return Path;
 }

 // Returns "/path/to/" from a full /path/to/file.name
 string TWFunc::Get_Path(string Path) {
 	size_t pos = Path.find_last_of("/");
 	if (pos != string::npos) {
 		string Pathonly;
 		Pathonly = Path.substr(0, pos + 1);
 		return Pathonly;
 	} else
 		return Path;
 }

 // Returns "/path" from a full /path/to/file.name
 string TWFunc::Get_Root_Path(string Path) {
 	string Local_Path = Path;

 	// Make sure that we have a leading slash
 	if (Local_Path.substr(0, 1) != "/")
 		Local_Path = "/" + Local_Path;

 	// Trim the path to get the root path only
 	size_t position = Local_Path.find("/", 2);
 	if (position != string::npos) {
 		Local_Path.resize(position);
 	}
 	return Local_Path;
 }

 void TWFunc::install_htc_dumlock(void) {
 	int need_libs = 0;

 	if (!PartitionManager.Mount_By_Path("/system", true))
 		return;

 	if (!PartitionManager.Mount_By_Path("/data", true))
 		return;

 	ui_print("Installing HTC Dumlock to system...\n");
 	system("cp /res/htcd/htcdumlocksys /system/bin/htcdumlock && chmod 755 /system/bin/htcdumlock");
 	if (!Path_Exists("/system/bin/flash_image")) {
 		ui_print("Installing flash_image...\n");
 		system("cp /res/htcd/flash_imagesys /system/bin/flash_image && chmod 755 /system/bin/flash_image");
 		need_libs = 1;
 	} else
 		ui_print("flash_image is already installed, skipping...\n");
 	if (!Path_Exists("/system/bin/dump_image")) {
 		ui_print("Installing dump_image...\n");
 		system("cp /res/htcd/dump_imagesys /system/bin/dump_image && chmod 755 /system/bin/dump_image");
 		need_libs = 1;
 	} else
 		ui_print("dump_image is already installed, skipping...\n");
 	if (need_libs) {
 		ui_print("Installing libs needed for flash_image and dump_image...\n");
 		system("cp /res/htcd/libbmlutils.so /system/lib && chmod 755 /system/lib/libbmlutils.so");
 		system("cp /res/htcd/libflashutils.so /system/lib && chmod 755 /system/lib/libflashutils.so");
 		system("cp /res/htcd/libmmcutils.so /system/lib && chmod 755 /system/lib/libmmcutils.so");
 		system("cp /res/htcd/libmtdutils.so /system/lib && chmod 755 /system/lib/libmtdutils.so");
 	}
 	ui_print("Installing HTC Dumlock app...\n");
 	mkdir("/data/app", 0777);
 	system("rm /data/app/com.teamwin.htcdumlock*");
 	system("cp /res/htcd/HTCDumlock.apk /data/app/com.teamwin.htcdumlock.apk");
 	sync();
 	ui_print("HTC Dumlock is installed.\n");
 }

 void TWFunc::htc_dumlock_restore_original_boot(void) {
 	if (!PartitionManager.Mount_By_Path("/sdcard", true))
 		return;

 	ui_print("Restoring original boot...\n");
 	system("htcdumlock restore");
 	ui_print("Original boot restored.\n");
 }

 void TWFunc::htc_dumlock_reflash_recovery_to_boot(void) {
 	if (!PartitionManager.Mount_By_Path("/sdcard", true))
 		return;

 	ui_print("Reflashing recovery to boot...\n");
 	system("htcdumlock recovery noreboot");
 	ui_print("Recovery is flashed to boot.\n");
 }

 int TWFunc::Recursive_Mkdir(string Path) {
 	string pathCpy = Path;
 	string wholePath;
 	size_t pos = pathCpy.find("/", 2);

 	while (pos != string::npos)
 	{
 		wholePath = pathCpy.substr(0, pos);
 		if (mkdir(wholePath.c_str(), 0777) && errno != EEXIST) {
 			LOGE("Unable to create folder: %s  (errno=%d)\n", wholePath.c_str(), errno);
 			return false;
 		}

 		pos = pathCpy.find("/", pos + 1);
 	}
 	if (mkdir(wholePath.c_str(), 0777) && errno != EEXIST)
 		return false;
 	return true;
 }

 unsigned long long TWFunc::Get_Folder_Size(string Path, bool Display_Error) {
 	DIR* d;
 	struct dirent* de;
 	struct stat st;
 	char path2[1024], filename[1024];
 	unsigned long long dusize = 0;

 	// Make a copy of path in case the data in the pointer gets overwritten later
 	strcpy(path2, Path.c_str());

 	d = opendir(path2);
 	if (d == NULL)
 	{
 		LOGE("error opening '%s'\n", path2);
 		return 0;
 	}

 	while ((de = readdir(d)) != NULL)
 	{
 		if (de->d_type == DT_DIR && strcmp(de->d_name, ".") != 0 && strcmp(de->d_name, "..") != 0)
 		{
 			strcpy(filename, path2);
 			strcat(filename, "/");
 			strcat(filename, de->d_name);
 			dusize += Get_Folder_Size(filename, Display_Error);
 		}
 		else if (de->d_type == DT_REG)
 		{
 			strcpy(filename, path2);
 			strcat(filename, "/");
 			strcat(filename, de->d_name);
 			stat(filename, &st);
 			dusize += (unsigned long long)(st.st_size);
 		}
 	}
 	closedir(d);

 	return dusize;
 }

 bool TWFunc::Path_Exists(string Path) {
 	// Check to see if the Path exists
 	struct stat st;

 	if (stat(Path.c_str(), &st) != 0)
 		return false;
 	else
 		return true;
 }

 void TWFunc::GUI_Operation_Text(string Read_Value, string Default_Text) {
 	string Display_Text;

 	DataManager::GetValue(Read_Value, Display_Text);
 	if (Display_Text.empty())
 		Display_Text = Default_Text;

 	DataManager::SetValue("tw_operation", Display_Text);
 	DataManager::SetValue("tw_partition", "");
 }

 void TWFunc::GUI_Operation_Text(string Read_Value, string Partition_Name, string Default_Text) {
 	string Display_Text;

 	DataManager::GetValue(Read_Value, Display_Text);
 	if (Display_Text.empty())
 		Display_Text = Default_Text;

 	DataManager::SetValue("tw_operation", Display_Text);
 	DataManager::SetValue("tw_partition", Partition_Name);
 }

 unsigned long TWFunc::Get_File_Size(string Path) {
 	struct stat st;

 	if (stat(Path.c_str(), &st) != 0)
 		return 0;
 	return st.st_size;
 }

 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
 void TWFunc::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);
 }

 void TWFunc::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 TWFunc::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.
 }

 // reboot: Reboot the system. Return -1 on error, no return on success
 int TWFunc::tw_reboot(RebootCommand command)
 {
 	// Always force a sync before we reboot
     sync();

     switch (command)
     {
     case rb_current:
     case rb_system:
         twfinish_recovery("s");
 		sync();
 		check_and_run_script("/sbin/rebootsystem.sh", "reboot system");
         return reboot(RB_AUTOBOOT);
     case rb_recovery:
 		check_and_run_script("/sbin/rebootrecovery.sh", "reboot recovery");
         return __reboot(LINUX_REBOOT_MAGIC1, LINUX_REBOOT_MAGIC2, LINUX_REBOOT_CMD_RESTART2, (void*) "recovery");
     case rb_bootloader:
 		check_and_run_script("/sbin/rebootbootloader.sh", "reboot bootloader");
         return __reboot(LINUX_REBOOT_MAGIC1, LINUX_REBOOT_MAGIC2, LINUX_REBOOT_CMD_RESTART2, (void*) "bootloader");
     case rb_poweroff:
 		check_and_run_script("/sbin/poweroff.sh", "power off");
         return reboot(RB_POWER_OFF);
     case rb_download:
 		check_and_run_script("/sbin/rebootdownload.sh", "reboot download");
 		return __reboot(LINUX_REBOOT_MAGIC1, LINUX_REBOOT_MAGIC2, LINUX_REBOOT_CMD_RESTART2, (void*) "download");
 	return 1;
     default:
         return -1;
     }
     return -1;
 }

 void TWFunc::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);
 	}
 }

 void TWFunc::Output_Version(void) {
 	string Path, Command;
 	char version[255];

 	Path = DataManager::GetSettingsStoragePath();
 	if (!PartitionManager.Mount_By_Path(Path, false)) {
 		LOGI("Unable to mount '%s' to write version number.\n");
 		return;
 	}
 	Path += "/TWRP/.version";
 	if (Path_Exists(Path)) {
 		Command = "rm -f " + Path;
 		system(Command.c_str());
 	}
 	FILE *fp = fopen(Path.c_str(), "w");
 	if (fp == NULL) {
 		LOGE("Unable to open '%s'.\n", Path.c_str());
 		return;
 	}
 	strcpy(version, TW_VERSION_STR);
 	fwrite(version, sizeof(version[0]), strlen(version) / sizeof(version[0]), fp);
 	fclose(fp);
 	sync();
 }
	#include <stdio.h>
	#include <stdlib.h>
	#include <string.h>
	#include <sys/stat.h>
	#include <sys/vfs.h>
	#include <unistd.h>
	#include <vector>
	#include <dirent.h>
	#include <time.h>
	#include <errno.h>
	#include <sys/reboot.h>

	#include "twrp-functions.hpp"
	#include "partitions.hpp"
	#include "common.h"
	#include "data.hpp"
	#include "bootloader.h"
	#include "variables.h"

	/* Checks md5 for a path
	Return values:
	-1 : MD5 does not exist
	0 : Failed
	1 : Success */
	int TWFunc::Check_MD5(string File) {
	int ret;
	string Command, DirPath, MD5_File, Sline, Filename, MD5_File_Filename, OK;
	char line[255];
	size_t pos;

	MD5_File = File + ".md5";
	if (Path_Exists(MD5_File)) {
	DirPath = Get_Path(File);
	MD5_File = Get_Filename(MD5_File);
	Command = "cd '" + DirPath + "' && /sbin/busybox md5sum -c '" + MD5_File + "' > /tmp/md5output";
	system(Command.c_str());
	FILE * cs = fopen("/tmp/md5output", "r");
	if (cs == NULL) {
	LOGE("Unable to open md5 output file.\n");
	return 0;
	}

	fgets(line, sizeof(line), cs);
	fclose(cs);

	Sline = line;
	pos = Sline.find(":");
	if (pos != string::npos) {
	Filename = Get_Filename(File);
	MD5_File_Filename = Sline.substr(0, pos);
	OK = Sline.substr(pos + 2, Sline.size() - pos - 2);
	if (Filename == MD5_File_Filename && (OK == "OK" \|\| OK == "OK\n")) {
	//MD5 is good, return 1
	ret = 1;
	} else {
	// MD5 is bad, return 0
	ret = 0;
	}
	} else {
	// MD5 is bad, return 0
	ret = 0;
	}
	} else {
	//No md5 file, return -1
	ret = -1;
	}

	return ret;
	}

	// Returns "file.name" from a full /path/to/file.name
	string TWFunc::Get_Filename(string Path) {
	size_t pos = Path.find_last_of("/");
	if (pos != string::npos) {
	string Filename;
	Filename = Path.substr(pos + 1, Path.size() - pos - 1);
	return Filename;
	} else
	return Path;
	}

	// Returns "/path/to/" from a full /path/to/file.name
	string TWFunc::Get_Path(string Path) {
	size_t pos = Path.find_last_of("/");
	if (pos != string::npos) {
	string Pathonly;
	Pathonly = Path.substr(0, pos + 1);
	return Pathonly;
	} else
	return Path;
	}

	// Returns "/path" from a full /path/to/file.name
	string TWFunc::Get_Root_Path(string Path) {
	string Local_Path = Path;

	// Make sure that we have a leading slash
	if (Local_Path.substr(0, 1) != "/")
	Local_Path = "/" + Local_Path;

	// Trim the path to get the root path only
	size_t position = Local_Path.find("/", 2);
	if (position != string::npos) {
	Local_Path.resize(position);
	}
	return Local_Path;
	}

	void TWFunc::install_htc_dumlock(void) {
	int need_libs = 0;

	if (!PartitionManager.Mount_By_Path("/system", true))
	return;

	if (!PartitionManager.Mount_By_Path("/data", true))
	return;

	ui_print("Installing HTC Dumlock to system...\n");
	system("cp /res/htcd/htcdumlocksys /system/bin/htcdumlock && chmod 755 /system/bin/htcdumlock");
	if (!Path_Exists("/system/bin/flash_image")) {
	ui_print("Installing flash_image...\n");
	system("cp /res/htcd/flash_imagesys /system/bin/flash_image && chmod 755 /system/bin/flash_image");
	need_libs = 1;
	} else
	ui_print("flash_image is already installed, skipping...\n");
	if (!Path_Exists("/system/bin/dump_image")) {
	ui_print("Installing dump_image...\n");
	system("cp /res/htcd/dump_imagesys /system/bin/dump_image && chmod 755 /system/bin/dump_image");
	need_libs = 1;
	} else
	ui_print("dump_image is already installed, skipping...\n");
	if (need_libs) {
	ui_print("Installing libs needed for flash_image and dump_image...\n");
	system("cp /res/htcd/libbmlutils.so /system/lib && chmod 755 /system/lib/libbmlutils.so");
	system("cp /res/htcd/libflashutils.so /system/lib && chmod 755 /system/lib/libflashutils.so");
	system("cp /res/htcd/libmmcutils.so /system/lib && chmod 755 /system/lib/libmmcutils.so");
	system("cp /res/htcd/libmtdutils.so /system/lib && chmod 755 /system/lib/libmtdutils.so");
	}
	ui_print("Installing HTC Dumlock app...\n");
	mkdir("/data/app", 0777);
	system("rm /data/app/com.teamwin.htcdumlock*");
	system("cp /res/htcd/HTCDumlock.apk /data/app/com.teamwin.htcdumlock.apk");
	sync();
	ui_print("HTC Dumlock is installed.\n");
	}

	void TWFunc::htc_dumlock_restore_original_boot(void) {
	if (!PartitionManager.Mount_By_Path("/sdcard", true))
	return;

	ui_print("Restoring original boot...\n");
	system("htcdumlock restore");
	ui_print("Original boot restored.\n");
	}

	void TWFunc::htc_dumlock_reflash_recovery_to_boot(void) {
	if (!PartitionManager.Mount_By_Path("/sdcard", true))
	return;

	ui_print("Reflashing recovery to boot...\n");
	system("htcdumlock recovery noreboot");
	ui_print("Recovery is flashed to boot.\n");
	}

	int TWFunc::Recursive_Mkdir(string Path) {
	string pathCpy = Path;
	string wholePath;
	size_t pos = pathCpy.find("/", 2);

	while (pos != string::npos)
	{
	wholePath = pathCpy.substr(0, pos);
	if (mkdir(wholePath.c_str(), 0777) && errno != EEXIST) {
	LOGE("Unable to create folder: %s (errno=%d)\n", wholePath.c_str(), errno);
	return false;
	}

	pos = pathCpy.find("/", pos + 1);
	}
	if (mkdir(wholePath.c_str(), 0777) && errno != EEXIST)
	return false;
	return true;
	}

	unsigned long long TWFunc::Get_Folder_Size(string Path, bool Display_Error) {
	DIR* d;
	struct dirent* de;
	struct stat st;
	char path2[1024], filename[1024];
	unsigned long long dusize = 0;

	// Make a copy of path in case the data in the pointer gets overwritten later
	strcpy(path2, Path.c_str());

	d = opendir(path2);
	if (d == NULL)
	{
	LOGE("error opening '%s'\n", path2);
	return 0;
	}

	while ((de = readdir(d)) != NULL)
	{
	if (de->d_type == DT_DIR && strcmp(de->d_name, ".") != 0 && strcmp(de->d_name, "..") != 0)
	{
	strcpy(filename, path2);
	strcat(filename, "/");
	strcat(filename, de->d_name);
	dusize += Get_Folder_Size(filename, Display_Error);
	}
	else if (de->d_type == DT_REG)
	{
	strcpy(filename, path2);
	strcat(filename, "/");
	strcat(filename, de->d_name);
	stat(filename, &st);
	dusize += (unsigned long long)(st.st_size);
	}
	}
	closedir(d);

	return dusize;
	}

	bool TWFunc::Path_Exists(string Path) {
	// Check to see if the Path exists
	struct stat st;

	if (stat(Path.c_str(), &st) != 0)
	return false;
	else
	return true;
	}

	void TWFunc::GUI_Operation_Text(string Read_Value, string Default_Text) {
	string Display_Text;

	DataManager::GetValue(Read_Value, Display_Text);
	if (Display_Text.empty())
	Display_Text = Default_Text;

	DataManager::SetValue("tw_operation", Display_Text);
	DataManager::SetValue("tw_partition", "");
	}

	void TWFunc::GUI_Operation_Text(string Read_Value, string Partition_Name, string Default_Text) {
	string Display_Text;

	DataManager::GetValue(Read_Value, Display_Text);
	if (Display_Text.empty())
	Display_Text = Default_Text;

	DataManager::SetValue("tw_operation", Display_Text);
	DataManager::SetValue("tw_partition", Partition_Name);
	}

	unsigned long TWFunc::Get_File_Size(string Path) {
	struct stat st;

	if (stat(Path.c_str(), &st) != 0)
	return 0;
	return st.st_size;
	}

	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
	void TWFunc::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);
	}

	void TWFunc::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 TWFunc::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.
	}

	// reboot: Reboot the system. Return -1 on error, no return on success
	int TWFunc::tw_reboot(RebootCommand command)
	{
	// Always force a sync before we reboot
	sync();

	switch (command)
	{
	case rb_current:
	case rb_system:
	twfinish_recovery("s");
	sync();
	check_and_run_script("/sbin/rebootsystem.sh", "reboot system");
	return reboot(RB_AUTOBOOT);
	case rb_recovery:
	check_and_run_script("/sbin/rebootrecovery.sh", "reboot recovery");
	return __reboot(LINUX_REBOOT_MAGIC1, LINUX_REBOOT_MAGIC2, LINUX_REBOOT_CMD_RESTART2, (void*) "recovery");
	case rb_bootloader:
	check_and_run_script("/sbin/rebootbootloader.sh", "reboot bootloader");
	return __reboot(LINUX_REBOOT_MAGIC1, LINUX_REBOOT_MAGIC2, LINUX_REBOOT_CMD_RESTART2, (void*) "bootloader");
	case rb_poweroff:
	check_and_run_script("/sbin/poweroff.sh", "power off");
	return reboot(RB_POWER_OFF);
	case rb_download:
	check_and_run_script("/sbin/rebootdownload.sh", "reboot download");
	return __reboot(LINUX_REBOOT_MAGIC1, LINUX_REBOOT_MAGIC2, LINUX_REBOOT_CMD_RESTART2, (void*) "download");
	return 1;
	default:
	return -1;
	}
	return -1;
	}

	void TWFunc::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);
	}
	}

	void TWFunc::Output_Version(void) {
	string Path, Command;
	char version[255];

	Path = DataManager::GetSettingsStoragePath();
	if (!PartitionManager.Mount_By_Path(Path, false)) {
	LOGI("Unable to mount '%s' to write version number.\n");
	return;
	}
	Path += "/TWRP/.version";
	if (Path_Exists(Path)) {
	Command = "rm -f " + Path;
	system(Command.c_str());
	}
	FILE *fp = fopen(Path.c_str(), "w");
	if (fp == NULL) {
	LOGE("Unable to open '%s'.\n", Path.c_str());
	return;
	}
	strcpy(version, TW_VERSION_STR);
	fwrite(version, sizeof(version[0]), strlen(version) / sizeof(version[0]), fp);
	fclose(fp);
	sync();
	}