System Interface

These classes provides a unified interface to the OS services. More...

Classes
class	Directory
class	File
class	FileItem
class	Path
class	Process
class	ProcessBuilder
class	StopWatch
class	System
class	SystemException

Detailed Description

These classes provides a unified interface to the OS services.

File Management

The first file management class is Path that is used to represent file paths and provides many operations:

• appending path,
• extracting / setting file and directory part,
• getting absolute form,
• getting and setting extension.

It provides also system information about paths:

• getting / setting current path,
• getting home directory,
• getting path item separator,
• getting path separator in path lists.

Other classes represent files themselves. They are derivated from the FileItem class and may be either Directory or File. A file item is obtained by the FileItem::get() method taking the path of looked file. The file item gives the information as name, path, type and access rights. The files provides also information about their size while directories content may be retrieved using the Directory::Iterator or made using the Directory::make method. Once their use is completed, this objects must be released with the method FileItem::release().

Process Management

The Process objects provides control on the process of the OS:

• getting liveness,
• getting return code after death,
• killing,
• waiting until end of the process.

A process may be created using the ProcessBuilder class. It allows to set process configuration like arguments and standard IO. Once the method ProcessBuilder::run() is called, the process is created, either a duplication of the current one, or a new command, with the set configuration and a process object is returned.

Miscalleneous Classes

First, ELM provides a class to measure times as precisely as possible on the current OS: the class StopWatch.

Then, the static class System provides some services like:

• System::pipe() – to create piped streams.