TCGetAttr

Terminal Control: Get terminal attributes

Declaration

Source position: oldlinux.pp line 1497

function TCGetAttr(

fd: LongInt;

var tios: Termios

):Boolean;

Description

TCGetAttr gets the terminal parameters from the terminal referred to by the file descriptor fd and returns them in a TermIOS structure tios. The function returns True if the call was succesfull, False otherwise.

Errors

Errors are reported in LinuxError

TCDrain		Terminal control: Wait till all data was transmitted
TCFlow		Terminal control: Suspend transmission of data
TCFlush		Terminal control: Discard data buffer
TCGetPGrp		Terminal control: Get process group
TCSendBreak		Terminal control: Send break
TCSetAttr		Terminal control: Set attributes
TCSetPGrp		Terminal control: Set process group
TTYName		Terminal control: Get terminal name
IsATTY		Check if filehandle is a TTY (terminal)

Example

Program Example55;

uses oldlinux;

{ Program to demonstrate the TCGetAttr/TCSetAttr/CFMakeRaw functions. }

procedure ShowTermios(var tios:Termios);
begin
  WriteLn('Input Flags  : $',hexstr(tios.c_iflag,8)+#13);
  WriteLn('Output Flags : $',hexstr(tios.c_oflag,8));
  WriteLn('Line Flags   : $',hexstr(tios.c_lflag,8));
  WriteLn('Control Flags: $',hexstr(tios.c_cflag,8));
end;

var
  oldios,
  tios : Termios;
begin
  WriteLn('Old attributes:');
  TCGetAttr(1,tios);
  ShowTermios(tios);
  oldios:=tios;
  Writeln('Setting raw terminal mode');
  CFMakeRaw(tios);
  TCSetAttr(1,TCSANOW,tios);
  WriteLn('Current attributes:');
  TCGetAttr(1,tios);
  ShowTermios(tios);
  TCSetAttr(1,TCSANOW,oldios);
end.

Notes