1 files changed, 517 insertions, 0 deletions
diff --git a/mmc_updater/src/FileUtils.cpp b/mmc_updater/src/FileUtils.cpp
new file mode 100644
index 00000000..712c0c5d
--- /dev/null
+++ b/mmc_updater/src/FileUtils.cpp
@@ -0,0 +1,517 @@
+#include "FileUtils.h"
+
+#include "DirIterator.h"
+#include "Log.h"
+#include "Platform.h"
+#include "StringUtils.h"
+
+#include <algorithm>
+#include <assert.h>
+#include <string.h>
+#include <fstream>
+#include <iostream>
+// this actually works with mingw32, which we use.
+#include <libgen.h>
+
+#ifdef PLATFORM_UNIX
+#include <unistd.h>
+#include <stdio.h>
+#include <fcntl.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/stat.h>
+#include <errno.h>
+#endif
+
+FileUtils::IOException::IOException(const std::string& error)
+{
+	init(errno,error);
+}
+
+FileUtils::IOException::IOException(int errorCode, const std::string& error)
+{
+	init(errorCode,error);
+}
+
+void FileUtils::IOException::init(int errorCode, const std::string& error)
+{
+	m_error = error;
+
+#ifdef PLATFORM_UNIX
+	m_errorCode = errorCode;
+
+	if (m_errorCode > 0)
+	{
+		m_error += " details: " + std::string(strerror(m_errorCode));
+	}
+#endif
+
+#ifdef PLATFORM_WINDOWS
+	m_errorCode = 0;
+	m_error += " GetLastError returned: " + intToStr(GetLastError());
+#endif
+}
+
+FileUtils::IOException::~IOException() throw ()
+{
+}
+
+FileUtils::IOException::Type FileUtils::IOException::type() const
+{
+#ifdef PLATFORM_UNIX
+	switch (m_errorCode)
+	{
+		case 0:
+			return NoError;
+		case EROFS:
+			return ReadOnlyFileSystem;
+		case ENOSPC:
+			return DiskFull;
+		default:
+			return Unknown;
+	}
+#else
+	return Unknown;
+#endif
+}
+
+bool FileUtils::fileExists(const char* path) throw (IOException)
+{
+#ifdef PLATFORM_UNIX
+	struct stat fileInfo;
+	if (lstat(path,&fileInfo) != 0)
+	{
+		if (errno == ENOENT)
+		{
+			return false;
+		}
+		else
+		{
+			throw IOException("Error checking for file " + std::string(path));
+		}
+	}
+	return true;
+#else
+	DWORD result = GetFileAttributes(path);
+	if (result == INVALID_FILE_ATTRIBUTES)
+	{
+		return false;
+	}
+	return true;
+#endif
+}
+
+int FileUtils::fileMode(const char* path) throw (IOException)
+{
+#ifdef PLATFORM_UNIX
+	struct stat fileInfo;
+	if (stat(path,&fileInfo) != 0)
+	{
+		throw IOException("Error reading file permissions for " + std::string(path));
+	}
+	return fileInfo.st_mode;
+#else
+	// not implemented for Windows
+	return 0;
+#endif
+}
+
+void FileUtils::chmod(const char* path, int mode) throw (IOException)
+{
+#ifdef PLATFORM_UNIX
+	if (::chmod(path,static_cast<mode_t>(mode)) != 0)
+	{
+		throw IOException("Failed to set permissions on " + std::string(path) + " to " + intToStr(mode));
+	}
+#else
+	// TODO - Not implemented under Windows - all files
+	// get default permissions
+#endif
+}
+
+void FileUtils::moveFile(const char* src, const char* dest) throw (IOException)
+{
+#ifdef PLATFORM_UNIX
+	if (rename(src,dest) != 0)
+	{
+		throw IOException("Unable to rename " + std::string(src) + " to " + std::string(dest));
+	}
+#else
+	if (!MoveFile(src,dest))
+	{
+		throw IOException("Unable to rename " + std::string(src) + " to " + std::string(dest));
+	}
+#endif
+}
+
+void FileUtils::mkpath(const char* dir) throw (IOException)
+{
+	std::string currentPath;
+	std::istringstream stream(dir);
+	while (!stream.eof())
+	{
+		std::string segment;
+		std::getline(stream,segment,'/');
+		currentPath += segment;
+		if (!currentPath.empty() && !fileExists(currentPath.c_str()))
+		{
+			mkdir(currentPath.c_str());
+		}
+		currentPath += '/';
+	}
+}
+
+void FileUtils::mkdir(const char* dir) throw (IOException)
+{
+#ifdef PLATFORM_UNIX
+	if (::mkdir(dir,S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH) != 0)
+	{
+		throw IOException("Unable to create directory " + std::string(dir));
+	}
+#else
+	if (!CreateDirectory(dir,0 /* default security attributes */))
+	{
+		throw IOException("Unable to create directory " + std::string(dir));
+	}
+#endif
+}
+
+void FileUtils::rmdir(const char* dir) throw (IOException)
+{
+#ifdef PLATFORM_UNIX
+	if (::rmdir(dir) != 0)
+	{
+		throw IOException("Unable to remove directory " + std::string(dir));
+	}
+#else
+	if (!RemoveDirectory(dir))
+	{
+		throw IOException("Unable to remove directory " + std::string(dir));
+	}
+#endif
+}
+
+void FileUtils::createSymLink(const char* link, const char* target) throw (IOException)
+{
+#ifdef PLATFORM_UNIX
+	if (symlink(target,link) != 0)
+	{
+		throw IOException("Unable to create symlink " + std::string(link) + " to " + std::string(target));
+	}
+#else
+	// symlinks are not supported under Windows (at least, not universally.
+	// Windows Vista and later do actually support symlinks)
+	LOG(Warn,"Skipping symlink creation - not implemented in Windows");
+#endif
+}
+
+void FileUtils::removeFile(const char* src) throw (IOException)
+{
+#ifdef PLATFORM_UNIX
+	if (unlink(src) != 0)
+	{
+		if (errno != ENOENT)
+		{
+			throw IOException("Unable to remove file " + std::string(src));
+		}
+	}
+#else
+	if (!DeleteFile(src))
+	{
+		if (GetLastError() == ERROR_ACCESS_DENIED)
+		{
+			// if another process is using the file, try moving it to
+			// a temporary directory and then
+			// scheduling it for deletion on reboot
+			std::string tempDeletePathBase = tempPath();
+			tempDeletePathBase += '/';
+			tempDeletePathBase += fileName(src);
+
+			int suffix = 0;
+			std::string tempDeletePath = tempDeletePathBase;
+			while (fileExists(tempDeletePath.c_str()))
+			{
+				++suffix;
+				tempDeletePath = tempDeletePathBase + '_' + intToStr(suffix);
+			}
+
+			LOG(Warn,"Unable to remove file " + std::string(src) + " - it may be in use.  Moving to "
+			         + tempDeletePath + " and scheduling delete on reboot.");
+			moveFile(src,tempDeletePath.c_str());
+			MoveFileEx(tempDeletePath.c_str(),0,MOVEFILE_DELAY_UNTIL_REBOOT);
+		}
+		else if (GetLastError() != ERROR_FILE_NOT_FOUND)
+		{
+			throw IOException("Unable to remove file " + std::string(src));
+		}
+	}
+#endif
+}
+
+std::string FileUtils::fileName(const char* path)
+{
+	char* pathCopy = strdup(path);
+	std::string basename = ::basename(pathCopy);
+	free(pathCopy);
+	return basename;
+}
+
+std::string FileUtils::dirname(const char* path)
+{
+	char* pathCopy = strdup(path);
+	std::string dirname = ::dirname(pathCopy);
+	free(pathCopy);
+	return dirname;
+}
+
+void FileUtils::touch(const char* path) throw (IOException)
+{
+#ifdef PLATFORM_UNIX
+	// see http://pubs.opengroup.org/onlinepubs/9699919799/utilities/touch.html
+	//
+	// we use utimes/futimes instead of utimensat/futimens for compatibility
+	// with older Linux and Mac
+
+	if (fileExists(path))
+	{
+		utimes(path,0 /* use current date/time */);
+	}
+	else
+	{
+		int fd = creat(path,S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH);
+		if (fd != -1)
+		{
+			futimes(fd,0 /* use current date/time */);
+			close(fd);
+		}
+		else
+		{
+			throw IOException("Unable to touch file " + std::string(path));
+		}
+	}
+#else
+	HANDLE result = CreateFile(path,GENERIC_WRITE,
+	                           FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
+	                           0,
+							   CREATE_ALWAYS,
+                               FILE_ATTRIBUTE_NORMAL,
+                               0);
+	if (result == INVALID_HANDLE_VALUE)
+	{
+		throw IOException("Unable to touch file " + std::string(path));
+	}
+	else
+	{
+		CloseHandle(result);
+	}
+#endif
+}
+
+void FileUtils::rmdirRecursive(const char* path) throw (IOException)
+{
+	// remove dir contents
+	DirIterator dir(path);
+	while (dir.next())
+	{
+		std::string name = dir.fileName();
+		if (name != "." && name != "..")
+		{
+			if (dir.isDir())
+			{
+				rmdir(dir.filePath().c_str());
+			}
+			else
+			{
+				removeFile(dir.filePath().c_str());
+			}
+		}
+	}
+
+	// remove the directory itself
+	rmdir(path);
+}
+
+std::string FileUtils::canonicalPath(const char* path)
+{
+#ifdef PLATFORM_UNIX
+	// on Linux and Mac OS 10.6, realpath() can allocate the required
+	// amount of memory automatically, however Mac OS 10.5 does not support
+	// this, so we used a fixed-sized buffer on all platforms
+	char canonicalPathBuffer[PATH_MAX+1];
+	if (realpath(path,canonicalPathBuffer) != 0)
+	{
+		return std::string(canonicalPathBuffer);
+	}
+	else
+	{
+		throw IOException("Error reading canonical path for " + std::string(path));
+	}
+#else
+	throw IOException("canonicalPath() not implemented");
+#endif
+}
+
+std::string FileUtils::toWindowsPathSeparators(const std::string& str)
+{
+	std::string result = str;
+	std::replace(result.begin(),result.end(),'/','\\');
+	return result;
+}
+
+std::string FileUtils::toUnixPathSeparators(const std::string& str)
+{
+	std::string result = str;
+	std::replace(result.begin(),result.end(),'\\','/');
+	return result;
+}
+
+std::string FileUtils::tempPath()
+{
+#ifdef PLATFORM_UNIX
+	std::string tmpDir(notNullString(getenv("TMPDIR")));
+	if (tmpDir.empty())
+	{
+		tmpDir = "/tmp";
+	}
+	return tmpDir;
+#else
+	char buffer[MAX_PATH+1];
+	GetTempPath(MAX_PATH+1,buffer);
+	return toUnixPathSeparators(buffer);
+#endif
+}
+
+bool startsWithDriveLetter(const char* path)
+{
+	return strlen(path) >= 2 &&
+	      (isalpha(path[0])) &&
+	       path[1] == ':';
+}
+
+bool FileUtils::isRelative(const char* path)
+{
+#ifdef PLATFORM_UNIX
+	return strlen(path) == 0 || path[0] != '/';
+#else
+	// on Windows, a path is relative if it does not start with:
+	// - '\\' (a UNC name)
+	// - '[Drive Letter]:\'
+	// - A single backslash
+	//
+	// the input path is assumed to have already been converted to use
+	// Unix-style path separators
+
+	std::string pathStr(path);
+
+	if ((!pathStr.empty() && pathStr.at(0) == '/') ||
+	    (startsWith(pathStr,"//")) ||
+	    (startsWithDriveLetter(pathStr.c_str())))
+	{
+		return false;
+	}
+	else
+	{
+		return true;
+	}
+#endif
+}
+
+void FileUtils::writeFile(const char* path, const char* data, int length) throw (IOException)
+{
+	std::ofstream stream(path,std::ios::binary | std::ios::trunc);
+	stream.write(data,length);
+}
+
+std::string FileUtils::readFile(const char* path) throw (IOException)
+{
+	std::ifstream inputFile(path, std::ios::in | std::ios::binary);
+	std::string content;
+	inputFile.seekg(0, std::ios::end);
+	content.resize(static_cast<unsigned int>(inputFile.tellg()));
+	inputFile.seekg(0, std::ios::beg);
+	inputFile.read(&content[0], static_cast<int>(content.size()));
+	return content;
+}
+
+void FileUtils::copyFile(const char* src, const char* dest) throw (IOException)
+{
+#ifdef PLATFORM_UNIX
+	std::ifstream inputFile(src,std::ios::binary);
+	std::ofstream outputFile(dest,std::ios::binary | std::ios::trunc);
+
+	if (!inputFile.good())
+	{
+		throw IOException("Failed to read file " + std::string(src));
+	}
+	if (!outputFile.good())
+	{
+		throw IOException("Failed to write file " + std::string(dest));
+	}
+	
+	outputFile << inputFile.rdbuf();
+
+	if (inputFile.bad())
+	{
+		throw IOException("Error reading file " + std::string(src));
+	}
+	if (outputFile.bad())
+	{
+		throw IOException("Error writing file " + std::string(dest));
+	}
+
+	chmod(dest,fileMode(src));
+#else
+	if (!CopyFile(src,dest,FALSE))
+	{
+		throw IOException("Failed to copy " + std::string(src) + " to " + std::string(dest));
+	}
+#endif
+}
+
+std::string FileUtils::makeAbsolute(const char* path, const char* basePath)
+{
+	if (isRelative(path))
+	{
+		assert(!isRelative(basePath));
+		return std::string(basePath) + '/' + std::string(path);
+	}
+	else
+	{
+		return path;
+	}
+}
+
+void FileUtils::chdir(const char* path) throw (IOException)
+{
+#ifdef PLATFORM_UNIX
+	if (::chdir(path) != 0)
+	{
+		throw FileUtils::IOException("Unable to change directory");
+	}
+#else
+	if (!SetCurrentDirectory(path))
+	{
+		throw FileUtils::IOException("Unable to change directory");
+	}
+#endif
+}
+
+std::string FileUtils::getcwd() throw (IOException)
+{
+#ifdef PLATFORM_UNIX
+	char path[PATH_MAX];
+	if (!::getcwd(path,PATH_MAX))
+	{
+		throw FileUtils::IOException("Failed to get current directory");
+	}
+	return std::string(path);
+#else
+	char path[MAX_PATH];
+	if (GetCurrentDirectory(MAX_PATH,path) == 0)
+	{
+		throw FileUtils::IOException("Failed to get current directory");
+	}
+	return toUnixPathSeparators(std::string(path));
+#endif
+}
+