From 6aa9bd0f77dcb5128167fae62e32aa5252fe85c6 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Petr=20Mr=C3=A1zek?= Date: Mon, 2 Dec 2013 00:55:24 +0100 Subject: Renew the updater branch Now with some actual consensus on what the updater will do! --- mmc_updater/src/FileUtils.h | 141 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 141 insertions(+) create mode 100644 mmc_updater/src/FileUtils.h (limited to 'mmc_updater/src/FileUtils.h') diff --git a/mmc_updater/src/FileUtils.h b/mmc_updater/src/FileUtils.h new file mode 100644 index 00000000..cb5830ae --- /dev/null +++ b/mmc_updater/src/FileUtils.h @@ -0,0 +1,141 @@ +#pragma once + +#include +#include + +#include "Platform.h" +#include "StringUtils.h" + + +/** A set of functions for performing common operations + * on files, throwing exceptions if an operation fails. + * + * Path arguments to FileUtils functions should use Unix-style path + * separators. + */ +class FileUtils +{ + public: + /** Base class for exceptions reported by + * FileUtils methods if an operation fails. + */ + class IOException : public std::exception + { + public: + IOException(const std::string& error); + IOException(int errorCode, const std::string& error); + + virtual ~IOException() throw (); + + enum Type + { + NoError, + /** Unknown error type. Call what() to get the description + * provided by the OS. + */ + Unknown, + ReadOnlyFileSystem, + DiskFull + }; + + virtual const char* what() const throw () + { + return m_error.c_str(); + } + + Type type() const; + + private: + void init(int errorCode, const std::string& error); + + std::string m_error; + int m_errorCode; + }; + + /** Remove a file. Throws an exception if the file + * could not be removed. + * + * On Unix, a file can be removed even if it is in use if the user + * has the necessary permissions. removeFile() tries to simulate + * this behavior on Windows. If a file cannot be removed on Windows + * because it is in use it will be moved to a temporary directory and + * scheduled for deletion on the next restart. + */ + static void removeFile(const char* src) throw (IOException); + + /** Set the permissions of a file. @p permissions uses the standard + * Unix mode_t values. + */ + static void chmod(const char* path, int permissions) throw (IOException); + + /** Returns true if the file at @p path exists. If @p path is a symlink, + * returns true if the symlink itself exists, not the target. + */ + static bool fileExists(const char* path) throw (IOException); + + /** Returns the Unix mode flags of @p path. If @p path is a symlink, + * returns the mode flags of the target. + */ + static int fileMode(const char* path) throw (IOException); + + static void moveFile(const char* src, const char* dest) throw (IOException); + static void mkdir(const char* dir) throw (IOException); + static void rmdir(const char* dir) throw (IOException); + static void createSymLink(const char* link, const char* target) throw (IOException); + static void touch(const char* path) throw (IOException); + static void copyFile(const char* src, const char* dest) throw (IOException); + + /** Create all the directories in @p path which do not yet exist. + * @p path may be relative or absolute. + */ + static void mkpath(const char* path) throw (IOException); + + /** Returns the file name part of a file path, including the extension. */ + static std::string fileName(const char* path); + + /** Returns the directory part of a file path. + * On Windows this includes the drive letter, if present in @p path. + */ + static std::string dirname(const char* path); + + /** Remove a directory and all of its contents. */ + static void rmdirRecursive(const char* dir) throw (IOException); + + /** Return the full, absolute path to a file, resolving any + * symlinks and removing redundant sections. + */ + static std::string canonicalPath(const char* path); + + /** Returns the path to a directory for storing temporary files. */ + static std::string tempPath(); + + /** Returns a copy of the path 'str' with Windows-style '\' + * dir separators converted to Unix-style '/' separators + */ + static std::string toUnixPathSeparators(const std::string& str); + + static std::string toWindowsPathSeparators(const std::string& str); + + /** Returns true if the provided path is relative. + * Or false if absolute. + */ + static bool isRelative(const char* path); + + /** Converts @p path to an absolute path. If @p path is already absolute, + * just returns @p path, otherwise prefixes it with @p basePath to make it absolute. + * + * @p basePath should be absolute. + */ + static std::string makeAbsolute(const char* path, const char* basePath); + + static void writeFile(const char* path, const char* data, int length) throw (IOException); + + static std::string readFile(const char* path) throw (IOException); + + /** Changes the current working directory to @p path */ + static void chdir(const char* path) throw (IOException); + + /** Returns the current working directory of the application. */ + static std::string getcwd() throw (IOException); +}; + -- cgit v1.2.3