- Qt 6.10
- Qt Core
- Input/Output and Networking
- Qt 6.10.2 Reference Documentation

File and Datastream Functions ◦ Inter-Process Communication

# Input/Output and Networking

These Qt Core classes are used to handle input and output to and from external devices, processes, files etc., as well as manipulating files and directories.

QBuffer | QIODevice interface for a QByteArray
QDataStream | Serialization of binary data to a QIODevice
QDir | Access to directory structures and their contents
QDirIterator | Iterator for directory entrylists
QDirListing | STL-style iterator for directory entries
QDirListing::DirEntry
QDirListing::const_iterator
QDirListing::sentinel
QFile | Interface for reading from and writing to files
QFileDevice | Interface for reading from and writing to open files
QFileInfo | OS-independent API to retrieve information about file system entries
QFileSystemWatcher | Interface for monitoring files and directories for modifications
QIODevice | The base interface class of all I/O devices in Qt
QLockFile | Locking between processes using a file
QNtfsPermissionCheckGuard | RAII class to manage NTFS permission checking
QProcess | Used to start external programs and to communicate with them
QProcessEnvironment | Holds the environment variables that can be passed to a program
QResource | Interface for reading directly from resources
QSaveFile | Interface for safely writing to files
QSettings | Persistent platform-independent application settings
QSocketNotifier | Support for monitoring activity on a file descriptor
QStorageInfo | Provides information about currently mounted storage and drives
QTemporaryDir | Creates a unique directory for temporary use
QTemporaryFile | I/O device that operates on temporary files
QTextStream | Convenient interface for reading and writing text
QUrl | Convenient interface for working with URLs
QUrlQuery | Way to manipulate a key-value pairs in a URL's query

File and Datastream Functions ◦ Inter-Process Communication