38 lines
466 B
ArmAsm
38 lines
466 B
ArmAsm
|
#
|
||
|
|
! $Source$
|
||
|
|
! $State$
|
||
|
|
! $Revision$
|
||
|
|
|
||
|
|
! Declare segments (the order is important).
|
||
|
|
|
||
|
|
.sect .text
|
||
|
|
.sect .rom
|
||
|
|
.sect .data
|
||
|
|
.sect .bss
|
||
|
|
|
||
|
|
.sect .text
|
||
|
|
|
||
|
|
! Say whether a given file descriptor number refers to a terminal.
|
||
|
|
|
||
|
|
.define _isatty
|
||
|
|
_isatty:
|
||
|
|
mov bx, sp
|
||
|
|
mov bx, 2(bx)
|
||
|
|
mov ax, 0x4400
|
||
|
|
int 0x21
|
||
|
|
jc error
|
||
|
|
testb dl, dl
|
||
|
|
jz not_tty
|
||
|
|
mov ax, 1
|
||
|
|
ret
|
||
|
|
not_tty:
|
||
|
|
mov (_errno), 25 ! ENOTTY
|
||
|
|
not_tty_2:
|
||
|
|
xor ax, ax
|
||
|
|
ret
|
||
|
|
error:
|
||
|
|
push ax
|
||
|
|
call __sys_seterrno
|
||
|
|
pop cx
|
||
|
|
jmp not_tty_2
|