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创建于 差异永不过期
function internalRuncommand(p:TProcess;var outputstring:string;
Function ReadInputPipe(const Pipe: TInputPipeStream; var BytesRead,OutputLen: integer; var OutputString: string): Boolean;
var stderrstring:string; var exitstatus:integer):integer;
var
var
available : integer;
numbytes,bytesread,available : integer;
NumBytes : integer;
outputlength, stderrlength : integer;
begin
stderrnumbytes,stderrbytesread : integer;
Result := False; available := 0;
begin
if(BytesRead<0)then BytesRead := 0;
result:=-1;
if(OutputLen<0)then OutputLen := 0;
try
repeat
try
if(Pipe=nil)then exit;
p.Options := [poUsePipes];
if(Pipe.NumBytesAvailable>0)
bytesread:=0;
then available := Pipe.NumBytesAvailable
outputlength:=0;
else break;
stderrbytesread:=0;
if(BytesRead+available>OutputLen)then
stderrlength:=0;
p.Execute;
while p.Running do
begin
// Only call ReadFromStream if Data from corresponding stream
// is already available, otherwise, on linux, the read call
// is blocking, and thus it is not possible to be sure to handle
// big data amounts bboth on output and stderr pipes. PM.
available:=P.Output.NumBytesAvailable;
if available > 0 then
begin
if (BytesRead + available > outputlength) then
begin
outputlength:=BytesRead + READ_BYTES;
Setlength(outputstring,outputlength);
end;
NumBytes := p.Output.Read(outputstring[1+bytesread], available);
if NumBytes > 0 then
Inc(BytesRead, NumBytes);
end
// The check for assigned(P.stderr) is mainly here so that
// if we use poStderrToOutput in p.Options, we do not access invalid memory.
else if assigned(P.stderr) and (P.StdErr.NumBytesAvailable > 0) then
begin
available:=P.StdErr.NumBytesAvailable;
if (StderrBytesRead + available > stderrlength) then
begin
stderrlength:=StderrBytesRead + READ_BYTES;
Setlength(stderrstring,stderrlength);
end;
StderrNumBytes := p.StdErr.Read(stderrstring[1+StderrBytesRead], available);
if StderrNumBytes > 0 then
Inc(StderrBytesRead, StderrNumBytes);
end
else
Sleep(100);
end;
// Get left output after end of execution
available:=P.Output.NumBytesAvailable;
while available > 0 do
begin
if (BytesRead + available > outputlength) then
begin
outputlength:=BytesRead + READ_BYTES;
Setlength(outputstring,outputlength);
end;
NumBytes := p.Output.Read(outputstring[1+bytesread], available);
if NumBytes > 0 then
Inc(BytesRead, NumBytes);
available:=P.Output.NumBytesAvailable;
end;
setlength(outputstring,BytesRead);
while assigned(P.stderr) and (P.Stderr.NumBytesAvailable > 0) do
begin
available:=P.Stderr.NumBytesAvailable;
if (StderrBytesRead + available > stderrlength) then
begin
stderrlength:=StderrBytesRead + READ_BYTES;
Setlength(stderrstring,stderrlength);
end;
StderrNumBytes := p.StdErr.Read(stderrstring[1+StderrBytesRead], available);
if StderrNumBytes > 0 then
Inc(StderrBytesRead, StderrNumBytes);
end;
setlength(stderrstring,StderrBytesRead);
exitstatus:=p.exitstatus;
result:=0; // we came to here, document that.
except
on e : Exception do
begin
begin
result:=1;
OutputLen := BytesRead+READ_BYTES;
setlength(outputstring,BytesRead);
SetLength(OutputString,OutputLen);
end;
try
try
NumBytes := Pipe.Read(OutputString[1+BytesRead], available);
if(NumBytes>0)
then Inc(BytesRead, NumBytes);
except
Result := False;
end;
end;
finally
Result := True;
end;
until false;
end;
Function InternalRunCommand(var P: TProcess; var Stdout, Stderr: string; var ExitStatus:integer): integer;
var
bytesread_stdout : integer;
outputlen_stdout : integer;
bytesread_stderr : integer;
outputlen_stderr : integer;
begin
Result := -1; if(P=nil)then exit;
try
try
P.Options := [poUsePipes];
bytesread_stdout := 0;
outputlen_stdout := 0;
bytesread_stderr := 0;
outputlen_stderr := 0;
P.Execute;
while(P.Running)do
begin
if(not ReadInputPipe(P.Output, bytesread_stdout, outputlen_stdout, Stdout))and
(not ReadInputPipe(P.Stderr, bytesread_stderr, outputlen_stderr, Stderr))
then sleep(100);
end;
//Get remaining output after end of execution:
ReadInputPipe(P.Output, bytesread_stdout, outputlen_stdout, Stdout);
ReadInputPipe(P.Stderr, bytesread_stderr, outputlen_stderr, Stderr);
ExitStatus := P.ExitStatus;
Result := 0; // we came to here, document that.
except
Result := 1;
end;
finally
FreeAndNil(P);
SetLength(Stdout,bytesread_stdout);
SetLength(Stderr,bytesread_stderr);
end;
end;
finally
end;
p.free;
end;
Function RunCommand(const ExeName:string;const Commands:array of string;var Stdout,StdErr:string): Boolean;
end;
var
ExitStatus,i : integer;
function RunCommand(const exename:string;const commands:array of string;var outputstring:string):boolean;
P : TProcess;
Var
begin
p : TProcess;
P := TProcess.Create(nil);
i,
P.Executable := ExeName;
exitstatus : integer;
if high(commands)>=0
ErrorString : String;
then for i:=low(Commands) to high(Commands)
begin
do P.Parameters.Add(Commands[i]);
p:=TProcess.create(nil);
Result := (InternalRunCommand(P,StdOut,StdErr,ExitStatus)=0) and (ExitStatus=0);
p.Executable:=exename;
end;
if high(commands)>=0 then
for i:=low(commands) to high(commands) do
p.Parameters.add(commands[i]);
result:=internalruncommand(p,outputstring,errorstring,exitstatus)=0;
if exitstatus<>0 then result:=false;
end;