我有一个控制台应用程序,我从GUI应用程序启动它。控制台应用程序需要参数来解析和处理文件名。目前,我能够捕获其输出并在 GUI 应用程序中显示它,但我希望能够发送命令以控制甚至停止其执行。
如何向控制台应用程序发送命令、字符串或任何东西,最好使用我打开的管道来读取其输出?
const
CReadBuffer = 2400;
var
saSecurity: TSecurityAttributes;
hRead: THandle;
hWrite: THandle;
suiStartup: TStartupInfo;
piProcess: TProcessInformation;
pBuffer: array[0..CReadBuffer] of AnsiChar;
dRead: DWord;
dRunning: DWord;
dWritten: DWord;
Command: String;
BytesLeft: Integer;
BytesAvail: Integer;
begin
saSecurity.nLength := SizeOf(TSecurityAttributes);
saSecurity.bInheritHandle := True;
saSecurity.lpSecurityDescriptor := nil;
if CreatePipe(hRead, hWrite, @saSecurity, 0) then
begin
FillChar(suiStartup, SizeOf(TStartupInfo), #0);
suiStartup.cb := SizeOf(TStartupInfo);
suiStartup.hStdInput := hRead;
suiStartup.hStdOutput := hWrite;
suiStartup.hStdError := hWrite;
suiStartup.dwFlags := STARTF_USESTDHANDLES or STARTF_USESHOWWINDOW;
suiStartup.wShowWindow := SW_HIDE;
Command := 'messageparser.exe c:\messagefile.msg';
UniqueString(Command);
if CreateProcess(nil, PChar(Command), @saSecurity,
@saSecurity, True, NORMAL_PRIORITY_CLASS, nil, nil, suiStartup, piProcess) then
begin
repeat
dRunning := WaitForSingleObject(piProcess.hProcess, 100);
Application.ProcessMessages;
repeat
dRead := 0;
if not PeekNamedPipe(hread, @pbuffer, CReadBuffer, @dRead, @BytesAvail, @BytesLeft) then
RaiseLastOSError;
if dRead <> 0 then
begin
ReadFile(hRead, pBuffer[0], CReadBuffer, dRead, nil);
pBuffer[dRead] := #0;
OemToCharA(pBuffer, pBuffer);
// do something with the data
// if a condition is present then do the following:
// WriteFile(hWrite, some_command, size_of_buffer, DWritten, nil);
end;
until (dRead < CReadBuffer);
until (dRunning <> WAIT_TIMEOUT);
CloseHandle(piProcess.hProcess);
CloseHandle(piProcess.hThread);
end;
CloseHandle(hRead);
CloseHandle(hWrite);
end;
然后在控制台端,有一个线程等待输入。这是执行方法:
while not Terminated do
begin
ReadLn(Command);
// process command
Sleep(10);
end;
这对我来说是新的,如果有正确操作的提示,我欢迎它们:)。但是每当我发送一个命令时,它都以我从ReadPipe中读取的pBuffer为准,而不是命令本身。
希望这可以帮到您。
--
根据Nat的提示,找到了解决方案。