Converts the output of the command line to a string list without the use of pipes or processes. This should work on all unixoid systems.

cmdtest.pas

program cmdtest;

uses
  Unix,
  Classes,
  SysUtils;

function CmdToString(Command: AnsiString): TStringList;
var
  formattedDateTime: AnsiString = '';
  Filename: AnsiString = '';
  tmpStringList: TStringList;
begin
  // Format date time string & construct filename
  DateTimeToString(formattedDateTime, 'yyyy-mm-dd_hh-nn-ss-z', Now);
  FileName := GetTempDir(true) + formattedDateTime + '.txt';

  // Create temporary file in temporary folder with timestamp as filename
  fpSystem(Command + ' > ' + FileName);

  // Create string list
  tmpStringList := TStringList.Create;

  // Load file into temporary string list
  tmpStringList.LoadFromFile(Filename);

  // Delete file
  DeleteFile(Filename);

  // Return temporary string list
  Result := tmpStringList;
end;

var
  myStringList: TStringList;
  i: Integer;

begin
  // sw_vers returns the Mac OS X version, doesn't work on Linux of course ;)
  myStringList := CmdToString('sw_vers');

  for i := 0 to myStringList.Count - 1 do
  begin
    WriteLn(myStringList[i]);
  end;
end.