derp
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@ -161,108 +161,4 @@ Begin
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Inherited Destroy;
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End;
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End.
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program procoutlarge;
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{
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Copyright (c) 2004-2011 by Marc Weustink and contributors
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This example is created in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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}
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// This is a
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// WORKING
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// demo program that shows
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// how to launch an external program
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// and read from its output.
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uses
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Classes, Process, SysUtils;
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const
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READ_BYTES = 2048;
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var
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OurCommand: String;
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OutputLines: TStringList;
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MemStream: TMemoryStream;
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OurProcess: TProcess;
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NumBytes: LongInt;
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BytesRead: LongInt;
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begin
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// A temp Memorystream is used to buffer the output
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MemStream := TMemoryStream.Create;
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BytesRead := 0;
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OurProcess := TProcess.Create(nil);
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// Recursive dir is a good example.
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OurCommand:='invalid command, please fix the IFDEFS.';
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{$IFDEF Windows}
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//Can't use dir directly, it's built in
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//so we just use the shell:
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OurCommand:='cmd.exe /c "dir /s d:\dev\code\mystic\"';
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{$ENDIF Windows}
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{$IFDEF Unix}
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//Needs to be tested on Linux/Unix:
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OurCommand := 'ls --recursive --all -l /';
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{$ENDIF Unix}
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writeln('-- Going to run: ' + OurCommand);
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OurProcess.CommandLine := OurCommand;
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// We cannot use poWaitOnExit here since we don't
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// know the size of the output. On Linux the size of the
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// output pipe is 2 kB; if the output data is more, we
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// need to read the data. This isn't possible since we are
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// waiting. So we get a deadlock here if we use poWaitOnExit.
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OurProcess.Options := [poUsePipes];
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WriteLn('-- External program run started');
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OurProcess.Execute;
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while OurProcess.Running do
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begin
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// make sure we have room
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MemStream.SetSize(BytesRead + READ_BYTES);
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// try reading it
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NumBytes := OurProcess.Output.Read((MemStream.Memory + BytesRead)^, READ_BYTES);
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if NumBytes > 0
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then begin
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Inc(BytesRead, NumBytes);
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Write('.') //Output progress to screen.
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end
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else begin
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// no data, wait 100 ms
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Sleep(100);
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end;
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end;
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// read last part
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repeat
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// make sure we have room
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MemStream.SetSize(BytesRead + READ_BYTES);
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// try reading it
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NumBytes := OurProcess.Output.Read((MemStream.Memory + BytesRead)^, READ_BYTES);
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if NumBytes > 0
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then begin
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Inc(BytesRead, NumBytes);
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Write('.');
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end;
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until NumBytes <= 0;
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if BytesRead > 0 then WriteLn;
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MemStream.SetSize(BytesRead);
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WriteLn('-- External program run complete');
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OutputLines := TStringList.Create;
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OutputLines.LoadFromStream(MemStream);
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WriteLn('-- External program output line count = ', OutputLines.Count, ' --');
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for NumBytes := 0 to OutputLines.Count - 1 do
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begin
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WriteLn(OutputLines[NumBytes]);
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end;
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WriteLn('-- Program end');
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OutputLines.Free;
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OurProcess.Free;
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MemStream.Free;
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end.
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End.
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