Process unit

The Process unit contains the code for the TProcess component, a cross-platform component to start and control other programs, offering also access to standard input and output for these programs.

TProcess does not handle wildcard expansion, does not support complex pipelines as in Unix. If this behaviour is desired, the shell can be executed with the pipeline as the command it should execute.

Classes and records

EProcess	class	Exception raised when an error occurs in a TProcess routine.
TIODescriptor	class
TIOTypeHelper	helper
TProcess	class	Class to start and control other processes.
TProcessHandleTypeHelper	helper
TProcessOptionHelper	helper
TProcessPriorityhelper	helper
TRunCommandEventCodeHelper	helper
TShowWindowOptionsHelper	helper
TStartupOptionHelper	helper

Procedures and functions

CommandToList	procedure	Convert a command-line to a list of command options.
DetectXTerm	function	Detect the terminal program.
RunCommand	function	Execute a command in the current working directory.
RunCommandIndir	function	Run a command in a specific directory.

Types

TAfterAllocateHandleEvent	procedure type
TFileWriteMode	enumeration
TGetHandleEvent	procedure type
TIOType	enumeration
TOnRunCommandEvent	procedure type	Event to get feedback while a command is executing.
TprocessChar	type	Character type used in the process.
TProcessClass	type	Class of TProcess.
TProcessForkEvent	procedure type	Prototype for TProcess.OnForkEvent event handler.
TProcessHandleType	enumeration
TProcessOption	enumeration	Options to be used when a process is started.
TProcessOptions	set	Set of TProcessOption.
TProcessPriority	enumeration	type determining the priority of the newly started process.
TProcessString	type	String type used in the process.
TProcessStringList	type	Alias for TProcessStrings.
TProcessStrings	type	Special-Purpose stringlist.
TRunCommandEventCode	enumeration	Enumeration for the various stages in a process run cycle.
TRunCommandEventCodeSet	set	Set of TRunCommandEventCode.
TShowWindowOptions	enumeration	Description of the main window of the new process.
TStartupOption	enumeration	Options determining how the application is started.
TStartupOptions	set	Set of TStartUpOption.

Resource strings

SErrCannotCreatePipes

resource string

Variables

DefaultTProcess	variable	Default process class to use.
SignalWaitTime	variable
TryTerminals	variable	A list of terminal programs to use (UNIX only).
XTermProgram	variable	Default XTerm program to use.

Uses

• Classes
• Pipes
• SysUtils
• Math