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+ TProcess support
This commit is contained in:
michael
parent
b2098c4de5
commit
023eeb3072
380
fcl/inc/process.pp
Normal file
380
fcl/inc/process.pp
Normal file
@ -0,0 +1,380 @@
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unit Process;
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{$mode delphi}
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{$H+}
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interface
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Uses Classes,Pipes,Windows;
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Type
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TProcessOptions = (poExecuteOnCreate,poRunSuspended,poUsePipes,
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poNoConsole,poStderrToOutPut,poWaitOnExit);
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TCreateOptions = Set of TPRocessOptions;
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TProcess = Class (TObject)
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Private
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FAccess : Cardinal;
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FApplicationName : string;
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FChildErrorStream : TOutPutPipeStream;
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FChildInputSTream : TInputPipeStream;
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FChildOutPutStream : TOutPutPipeStream;
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FConsoleTitle : String;
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FCreateOptions : TCreateOptions;
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FCreationFlags : Cardinal;
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FCommandLine : String;
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FCurrentDirectory : String;
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FDeskTop : String;
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FEnvironment : Pointer;
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FExitCode : Cardinal;
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FHandle : THandle;
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FInherithandles : LongBool;
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FParentErrorStream : TInputPipeStream;
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FParentInputSTream : TInputPipeStream;
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FParentOutputStream : TOutPutPipeStream;
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FPrepared : Boolean;
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FProcessAttributes : PSecurityAttributes;
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FProcessInformation : TProcessInformation;
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FRunning : Boolean;
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FStartupInfo : TStartupInfo;
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FThreadAttributes : PSecurityAttributes;
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Procedure FreeStreams;
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Function GetExitStatus : Integer;
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Function GetHandle : THandle;
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Function GetProcessAttributes : TSecurityAttributes;
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Function GetRunning : Boolean;
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Function GetThreadAttributes : TSecurityAttributes;
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Function GetWindowRect : TRect;
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Procedure SetFillAttribute (Value : Cardinal);
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Procedure SetProcessAttributes (Value : TSecurityAttributes);
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Procedure SetShowWindow (Value : Word);
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Procedure SetThreadAttributes (Value : TSecurityAttributes);
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Procedure SetWindowColumns (Value : Cardinal);
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Procedure SetWindowHeight (Value : Cardinal);
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Procedure SetWindowLeft (Value : Cardinal);
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Procedure SetWindowRect (Value : TRect);
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Procedure SetWindowRows (Value : Cardinal);
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Procedure SetWindowTop (Value : Cardinal);
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Procedure SetWindowWidth (Value : Cardinal);
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Public
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Constructor Create (Const ACommandline : String;
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Options : TCreateOptions);
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Destructor Destroy; override;
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Procedure Execute; virtual;
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Function Resume : Integer; virtual;
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Function Suspend : Integer; virtual;
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Function Terminate (AExitCode : Integer): Boolean; virtual;
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Function WaitOnExit : DWord;
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Property ApplicationName : String Read FApplicationname
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Write FApplicationname;
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Property CommandLine : String Read FCommandLine;
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Property ConsoleTitle : String Read FConsoleTitle Write FConsoleTitle;
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Property CurrentDirectory : String Read FCurrentDirectory
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Write FCurrentDirectory;
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Property CreateOptions : TCreateOptions Read FCreateOptions;
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Property CreationFlags : Cardinal Read FCreationFlags Write FCreationFlags;
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Property DeskTop : String Read FDeskTop Write FDeskTop;
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Property Environment : Pointer Read FEnvironment Write FEnvironment;
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Property ExitStatus : Integer Read GetExitStatus;
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Property FillAttribute : Cardinal Read FStartupInfo.dwFillAttribute
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Write SetFillAttribute;
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Property Handle : THandle Read FProcessInformation.hProcess;
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Property Input : TOutPutPipeStream Read FParentOutPutStream;
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Property InheritHandles : LongBool Read FInheritHandles;
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Property OutPut : TInputPipeStream Read FParentInputStream;
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Property ProcessAttributes : TSecurityAttributes
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Read GetProcessAttributes
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Write SetProcessAttributes;
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Property ProcessInformation : TProcessInformation
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Read FPRocessInformation;
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Property Running : Boolean Read GetRunning;
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Property ShowWindow : Word Read FStartupInfo.wShowWindow
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Write SetShowWindow;
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Property StartupInfo : TStartupInfo Read FStartupInfo;
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Property StdErr : TinputPipeStream Read FParentErrorStream;
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Property ThreadAttributes : TSecurityAttributes
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Read GetThreadAttributes
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Write SetThreadAttributes;
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Property ThreadHandle : THandle Read FprocessInformation.hThread;
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Property WindowColumns : Cardinal Read FStartupInfo.dwXCountchars
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Write SetWindowColumns;
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Property WindowHeight : Cardinal Read FStartupInfo.dwYsize
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Write SetWindowHeight;
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Property WindowLeft : Cardinal Read FStartupInfo.dwx
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Write SetWindowLeft;
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Property WindowRows : Cardinal Read FStartupInfo.dwYcountChars
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Write SetWindowRows;
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Property WindowTop : Cardinal Read FStartupInfo.dwy
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Write SetWindowTop ;
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Property WindowWidth : Cardinal Read FStartupInfo.dwXsize
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Write SetWindowWidth;
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Property WindowRect : Trect Read GetWindowRect
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Write SetWindowRect;
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end;
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implementation
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Constructor TProcess.Create (Const ACommandline : String;
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Options : TCreateOptions);
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begin
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Inherited create;
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FCreateOptions:=Options;
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FCommandLine:=ACommandLine;
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FAccess:=PROCESS_ALL_ACCESS;
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FStartupInfo.cb:=SizeOf(TStartupInfo);
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FInheritHandles:=True;
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If poExecuteOnCreate in FCreateOptions then
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execute;
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end;
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Destructor TProcess.Destroy;
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begin
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If assigned (FProcessAttributes) then Dispose (FPRocessAttributes);
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If assigned (FThreadAttributes) then Dispose (FThreadAttributes);
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FreeStreams;
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end;
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Procedure TProcess.FreeStreams;
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begin
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FParentErrorStream.Free;
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FParentInputSTream.Free;
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FParentOutputStream.Free;
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FChildErrorStream.free;
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FChildInputSTream.Free;
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FChildOutPutStream.Free;
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end;
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Function TProcess.GetExitStatus : Integer;
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begin
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If FRunning then
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GetExitCodeProcess(Handle,@FExitCode);
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Result:=FExitCode;
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end;
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Function TProcess.GetHandle : THandle;
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begin
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IF FHandle=0 Then
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FHandle:=OpenProcess (FAccess,True,FProcessInformation.dwProcessId);
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Result:=FHandle
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end;
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Function TProcess.GetProcessAttributes : TSecurityAttributes;
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Var P : PSecurityAttributes;
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begin
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IF not Assigned(FProcessAttributes) then
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begin
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// Provide empty dummy value;
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New(p);
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Fillchar(p^,Sizeof(TSecurityAttributes),0);
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Result:=p^;
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end
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else
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REsult:=FProcessAttributes^;
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end;
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Function TProcess.GetRunning : Boolean;
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begin
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IF FRunning then
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Frunning:=GetExitStatus=Still_Active;
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Result:=FRunning;
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end;
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Function TProcess.GetThreadAttributes : TSecurityAttributes;
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Var P : PSecurityAttributes;
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begin
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IF not Assigned(FThreadAttributes) then
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begin
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// Provide empty dummy value;
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New(p);
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Fillchar(p^,Sizeof(TSecurityAttributes),0);
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Result:=p^;
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end
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else
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Result:=FThreadAttributes^;
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end;
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Procedure TProcess.SetProcessAttributes (Value : TSecurityAttributes);
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begin
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If not Assigned (FProcessAttributes) then
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New(FProcessAttributes);
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FPRocessAttributes^:=VAlue;
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end;
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Procedure TProcess.SetThreadAttributes (Value : TSecurityAttributes);
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begin
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If not Assigned (FThreadAttributes) then
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New(FThreadAttributes);
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FThreadAttributes^:=VAlue;
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end;
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Procedure TProcess.Execute;
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Var PName,PDir : PChar;
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begin
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if poNoConsole in FCReateOptions then
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FCreationFlags:=FCreationFlags or Detached_Process;
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If poRunSuspended in FCreateOptions Then
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FCreationFlags:=FCreationFlags or Create_Suspended;
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If poUsePipes in FCreateOptions then
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begin
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FreeStreams;
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{ // This construct was supported on Win32 only. The new call takes this as a default.
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CreatePipeStreams (FChildInputSTream,FParentOutPutStream,@piInheritablePipe,1024);
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CreatePipeStreams (FParentInputStream,FChildOutPutStream,@piInheritablePipe,1024);
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}
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CreatePipeStreams (FChildInputSTream,FParentOutPutStream);
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CreatePipeStreams (FParentInputStream,FChildOutPutStream);
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if poStdErrToOutPut in FCreateOptions then
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{
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CreatePipeStreams (FParentErrorStream,FChildErrorStream,@piInheritablePipe,1024)
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}
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CreatePipeStreams (FParentErrorStream,FChildErrorStream)
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else
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begin
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FChildErrorStream:=FChildOutPutStream;
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FParentErrorStream:=FParentInputStream;
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end;
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FStartupInfo.dwFlags:=FStartupInfo.dwFlags or Startf_UseStdHandles;
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FStartupInfo.hStdInput:=FChildInputStream.Handle;
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FStartupInfo.hStdOutput:=FChildOutPutStream.Handle;
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FStartupInfo.hStdError:=FChildErrorStream.Handle;
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end;
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If FApplicationName<>'' then PName:=Pchar(FApplicationName) else PName:=Nil;
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If FCurrentDirectory<>'' then PName:=Pchar(FCurrentDirectory) else PDir:=Nil;
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CreateProcess (Pname,PChar(FCommandLine),FProcessAttributes,FThreadAttributes,
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FInheritHandles,FCreationFlags,FEnvironment,PDir,@FStartupInfo,
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@fProcessInformation);
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FRunning:=True;
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if (poWaitOnExit in FCreateOptions) and
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not (poRunSuspended in FCreateOptions) then
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WaitOnExit;
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end;
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Function TProcess.WaitOnExit : Dword;
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begin
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Result:=WaitForSingleObject (FprocessInformation.hProcess,Infinite);
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If Result<>Wait_Failed then
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GetExitStatus;
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FRunning:=False;
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end;
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Function TProcess.Suspend : Longint;
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begin
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Result:=SuspendThread(ThreadHandle);
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end;
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Function TProcess.Resume : LongInt;
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begin
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Result:=ResumeThread(ThreadHandle);
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end;
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Function TProcess.Terminate(AExitCode : Integer) : Boolean;
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begin
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Result:=False;
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If ExitStatus=Still_active then
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Result:=TerminateProcess(Handle,AexitCode);
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end;
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Procedure TProcess.SetFillAttribute (Value : Cardinal);
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begin
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FStartupInfo.dwFlags:=FStartupInfo.dwFlags or Startf_UseFillAttribute;
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FStartupInfo.dwFillAttribute:=Value;
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end;
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Procedure TProcess.SetShowWindow (Value : Word);
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begin
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FStartupInfo.dwFlags:=FStartupInfo.dwFlags or Startf_UseShowWindow;
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FStartupInfo.dwXCountChars:=Value;
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end;
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Procedure TProcess.SetWindowColumns (Value : Cardinal);
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begin
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FStartupInfo.dwFlags:=FStartupInfo.dwFlags or Startf_UseCountChars;
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FStartupInfo.dwXCountChars:=Value;
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end;
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Procedure TProcess.SetWindowHeight (Value : Cardinal);
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begin
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FStartupInfo.dwFlags:=FStartupInfo.dwFlags or Startf_UsePosition;
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FStartupInfo.dwYsize:=Value;
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end;
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Procedure TProcess.SetWindowLeft (Value : Cardinal);
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begin
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FStartupInfo.dwFlags:=FStartupInfo.dwFlags or Startf_UseSize;
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FStartupInfo.dwx:=Value;
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end;
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Procedure TProcess.SetWindowTop (Value : Cardinal);
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begin
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FStartupInfo.dwFlags:=FStartupInfo.dwFlags or Startf_UseSize;
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FStartupInfo.dwy:=Value;
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end;
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Procedure TProcess.SetWindowWidth (Value : Cardinal);
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begin
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FStartupInfo.dwFlags:=FStartupInfo.dwFlags or Startf_UsePosition;
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FStartupInfo.dwxsize:=Value;
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end;
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Function TProcess.GetWindowRect : TRect;
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begin
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With Result do
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With FStartupInfo do
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begin
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Left:=dwx;
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Right:=dwx+dwxSize;
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Top:=dwy;
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Bottom:=dwy+dwysize;
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end;
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end;
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Procedure TProcess.SetWindowRect (Value : Trect);
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begin
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FStartupInfo.dwFlags:=FStartupInfo.dwFlags or Startf_UseSize;
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FStartupInfo.dwFlags:=FStartupInfo.dwFlags or Startf_UsePosition;
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With Value do
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With FStartupInfo do
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begin
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dwx:=Left;
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dwxSize:=Right-Left;
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dwy:=Top;
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dwySize:=Bottom-top;
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end;
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end;
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Procedure TProcess.SetWindowRows (Value : Cardinal);
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begin
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FStartupInfo.dwFlags:=FStartupInfo.dwFlags or Startf_UseCountChars;
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FStartupInfo.dwYCountChars:=Value;
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end;
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end.
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280
fcl/inc/process.txt
Normal file
280
fcl/inc/process.txt
Normal file
@ -0,0 +1,280 @@
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This file describes the TProcess object.
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The TProcess object provides an easy way to start and manipulate
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the running of other programs (processes) by your application.
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On top of that, it allows you to redirect the program's input, output
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and standard error to streams that are readable/writeable by your
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program.
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It is a descendent class of TObject, but this is easily changeable to
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TComponent, should you desire to do so. None of the properties will
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conflict with the existing properties of TComponent.
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Furthermore it is written in such a way that it is easily extensible,
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although most of the properties that a Process has, are accessible and
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can be controlled with this object.
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In what follows, is a description of the object's methods and properties.
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The following two types control the creation of the TProcess Object.
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See The constructor description for a description on what they do.
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TProcessOptions = (poExecuteOnCreate,poRunSuspended,poUsePipes,
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poNoConsole,poStderrToOutPut,poWaitOnExit);
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TCreateOptions = Set of TPRocessOptions;
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Constructor Create (Const ACommandline : String;
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Options : TCreateOptions);
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This creates an TPRocess object.
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ACommandline is the commandline to execute, including any options
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you wish to pass to the program. If you don't specify an explicit path
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Windows will look for your program in the Windows directory and in the
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path.
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Options control the behaviour of the object. It can be a set of the
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following constants:
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poExecuteOnCreate
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If you include this option, the constructor will immediatly
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call the Execute method, using default settings for all parameters.
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This has the effect that the program is run at once.
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poRunSuspended
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If you include this option, the Execute method will start the
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program in a suspended state, and the program will start running
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only after you have called the Resume method.
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poUsePipes
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If you include this option, the Execute method will redirect the
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standard input,output and error descriptors to 3 pipes, which you
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can read from or write to.
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(see Input,OutPut and Error properties)
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It makes little sense to use ths for GUI applications (i.e. non-
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console applications)
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poNoConsole
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If you include this option, the application will not display a
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console, untill it explicitly needs one or requests one using the
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AllocConsole method. This is very convenient in combination with the
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poUsePipes option, allowing you to run an application without getting
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the Console window, and being able to read it's output at once.
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poStderrToOutPut
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If This option is included, then the error desciptor is redirected to
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the standard output director, i.e. all output goes to the standard
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output.
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poWaitOnExit
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If you specify this option, then the Execute method will wait for the
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executed program to finish, before returning.
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This option will be ignored if you also specified ExecuteOnCreate and
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CreateSuspended.
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Destructor Destroy; virtual;
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Destroys the TProcess Object. Be careful NOT to close a TProcess
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object when you use pipes, and the application is still running.
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you may kill it.
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Procedure Execute; virtual;
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This actually runs the application. It will return immediatly, unless
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you specified the poWaitOnExit option when creating the object.
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Function Resume : Integer; virtual;
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Resume lowers the suspend count of the application.
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it returns the new suspend count of the application. As long as the
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suspend count is larger than 0, the application will not run.
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If the suspend count reaches 0, the application will continue
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running.
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Function Suspend : Integer; virtual;
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Increases the suspend count of the application, and returns the
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new suspend count of the application.
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Function Terminate (AExitCode : Integer): Boolean; virtual;
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Terminate terminates the main thread of the application, giving it
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exitcode 'AExitCode'
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It returns True on succes, False on failure.
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Function WaitOnExit : Integer;
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This function returns immediatly if the application is not running,
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and waits for the application to finish if it was still running.
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Property ApplicationName : String;
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Sets the name of the application.
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Property CommandLine : String;
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Read-Only
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contains the commandline of the application, as set by the create
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method of TProcess.
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Property ConsoleTitle : String;
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For console applications only :
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Sets the title that appears in the title bar of the Console window.
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Property CreateOptions : TCreateOptions;
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Read-Only
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Contains the options as set by the Create method of TProcess.
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Property CreationFlags : Cardinal;
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This contains the creation flags that are passed to the CreateProcess
|
||||
call. These flags are modified by the Execute call to reflect any
|
||||
settings tat you may have made.
|
||||
|
||||
Property CurrentDirectory : String;
|
||||
When set, the process wil start in the directory that you have set
|
||||
for it.
|
||||
|
||||
Property DeskTop : String;
|
||||
NT only:
|
||||
Contains the name of the desktop or window station that the process
|
||||
will be run on. See STARTUPINFO in the win32 programmers manual.
|
||||
|
||||
Property Environment : Pointer;
|
||||
A pointer to a null-terminated list of environment variable pointers.
|
||||
Each pair is of the form 'Name=Value'.
|
||||
If this is nil, the environment of your application is used.
|
||||
|
||||
Property ExitStatus : Integer;
|
||||
Read-Only
|
||||
This returns the exit status of the application, or STILL_ACTIVE
|
||||
(defined in Windows.pas) if the application is still running.
|
||||
|
||||
Property FillAttribute : Integer;
|
||||
For console processes only.
|
||||
Sets the fill color for the console window.
|
||||
|
||||
Property Handle : THandle;
|
||||
Read-Only;
|
||||
Returns the handle of the process, which can be used to pass on to
|
||||
calls that require a handle of a process.
|
||||
Onl valid if the process is running.
|
||||
|
||||
|
||||
Property Input : TOutPutPipeStream;
|
||||
Read-Only
|
||||
Returns the Input handle of the process.
|
||||
Anything you write to this stream, will appear on the applications
|
||||
input file descriptor.
|
||||
Only valid if you used poUsePipes when you created the TProcess
|
||||
object.
|
||||
|
||||
Property InheritHandles : LongBool;
|
||||
If you set this to true, each inheritable handle of your application
|
||||
is inherited by the new application.
|
||||
|
||||
Property OutPut : TInputPipeStream;
|
||||
Read-Only
|
||||
Returns the Output handle of the process. Anything the process writes
|
||||
to its standard output can be read from this stream.
|
||||
Only valid if you used poUsePipes when you created the TProcess
|
||||
object.
|
||||
|
||||
Property ProcessAttributes : TSecurityAttributes;
|
||||
|
||||
Property ProcessInformation : TProcessInformation;
|
||||
Read-Only
|
||||
Gives access to the ProcessInformation returned by Windows
|
||||
upon executing the program. This contains
|
||||
hProcess : Process Handle (See Handle property)
|
||||
hThread : Process' main thread handle (See ThreadHandle property)
|
||||
dwProcessId : Process ID. (as seen in the task manager)
|
||||
dwThreadId : Process' main thread ID
|
||||
|
||||
Property Running : Boolean;
|
||||
Read-Only
|
||||
Retruns True if the application is still running, False otherwise.
|
||||
If the application is suspended or not doesn't affect the result.
|
||||
|
||||
Property ShowWindow : Word;
|
||||
You can set the applications ShowWindow attribute here.
|
||||
|
||||
Property StartupInfo : TStartupInfo;
|
||||
Read-Only
|
||||
Gives access to the TStartupInfo that will be passed to the
|
||||
application in the CreateProcess Call. You can manipulate its various
|
||||
members through the properties of the TProcess object.
|
||||
|
||||
Property StdErr : TinputPipeStream;
|
||||
Read-Only
|
||||
Returns the Output handle of the process. Anything the process writes
|
||||
to its error output can be read from this stream.
|
||||
Only valid if you used poUsePipes when you created the TProcess
|
||||
object.
|
||||
If you specified poStderrToOutput then this is the same as the
|
||||
'Output' stream.
|
||||
|
||||
Property ThreadAttributes : TSecurityAttributes;
|
||||
Contains the security attributes that will be passed to the process'
|
||||
main thread. By default, no security attributes are passed.
|
||||
|
||||
Property ThreadHandle : THandle;
|
||||
Read-Only
|
||||
Returns the Handle of the process' main thread.
|
||||
|
||||
Property WindowColumns : Integer;
|
||||
For console applications:
|
||||
This will set the number of screen columns that the console window
|
||||
will have.
|
||||
If you don't set this property nor the WindowRows property, Windows will
|
||||
choose default values.
|
||||
You can only set this PRIOR to calling the execute method, after
|
||||
the application was executed, or while it is running, the setting
|
||||
will be ignored until you run it again.
|
||||
|
||||
Property WindowHeight : Integer;
|
||||
Set the height of the application's main window.
|
||||
If you don't specify this, nor WindowWidth, Windows will choose
|
||||
the height and Width of the applications window.
|
||||
You can only set this PRIOR to calling the execute method, after
|
||||
the application was executed, or while it is running, the setting
|
||||
will be ignored until you run it again.
|
||||
|
||||
Property WindowLeft : Integer;
|
||||
Set the applications main window position, in pixels from the left
|
||||
side of the screen.
|
||||
If you don't specify this, nor WindowTop, Windows will choose
|
||||
the Left and Top of the applications window.
|
||||
You can only set this PRIOR to calling the execute method, after
|
||||
the application was executed, or while it is running, the setting
|
||||
will be ignored until you run it again.
|
||||
|
||||
Property WindowRows : Integer;
|
||||
For console applications:
|
||||
This will set the number of screen rows (lines) that the console window
|
||||
will have.
|
||||
If you don't set this property nor the WindowColumns property, Windows will
|
||||
choose default values.
|
||||
You can only set this PRIOR to calling the execute method, after
|
||||
the application was executed, or while it is running, the setting
|
||||
will be ignored until you run it again.
|
||||
|
||||
Property WindowTop : Integer;
|
||||
Set the applications main window position, in pixels from the Top
|
||||
side of the screen.
|
||||
If you don't specify this, nor WindowLeft, Windows will choose
|
||||
the Left and Top of the applications window.
|
||||
You can only set this PRIOR to calling the execute method, after
|
||||
the application was executed, or while it is running, the setting
|
||||
will be ignored until you run it again.
|
||||
|
||||
Property WindowWidth : Integer;
|
||||
Set the Width of the application's main window.
|
||||
If you don't specify this, nor WindowWidth, Windows will choose
|
||||
the height and Width of the applications window.
|
||||
You can only set this PRIOR to calling the execute method, after
|
||||
the application was executed, or while it is running, the setting
|
||||
will be ignored until you run it again.
|
||||
|
||||
Property WindowRect : Trect;
|
||||
This sets the bounding rectangle of the application's main window.
|
||||
It allows to set the WindowTop, WindowLeft, WindowHeight, WindowWidth
|
||||
properties in 1 call.
|
||||
|
||||
|
||||
|
||||
File diff suppressed because it is too large
Load Diff
@ -3,7 +3,7 @@
|
||||
#
|
||||
|
||||
[targets]
|
||||
units=classes $(INCUNITS) $(XMLUNITS) $(SHEDITUNITS)
|
||||
units=classes $(INCUNITS) $(XMLUNITS) $(SHEDITUNITS) process
|
||||
|
||||
[defaults]
|
||||
defaulttarget=win32
|
||||
|
||||
Loading…
Reference in New Issue
Block a user