2022-08-07 20:10:08 +00:00
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#
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! $Source$
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! $State$
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! $Revision$
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! Declare segments (the order is important).
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.sect .text
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.sect .rom
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.sect .data
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.sect .bss
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.sect .text
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! Say whether a given file descriptor number refers to a terminal.
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.define _isatty
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_isatty:
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2022-08-17 20:34:06 +00:00
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mov ebx, sp
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mov ebx, 4(ebx)
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o16 mov ax, 0x4400
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2022-08-07 20:10:08 +00:00
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int 0x21
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jc error
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testb dl, dl
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jz not_tty
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2022-08-17 20:34:06 +00:00
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mov eax, 1
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2022-08-07 20:10:08 +00:00
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ret
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not_tty:
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mov (_errno), 25 ! ENOTTY
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not_tty_2:
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2022-08-17 20:34:06 +00:00
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xor eax, eax
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2022-08-07 20:10:08 +00:00
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ret
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error:
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2022-08-17 20:34:06 +00:00
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push eax
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2022-08-07 20:10:08 +00:00
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call __sys_seterrno
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2022-08-17 20:34:06 +00:00
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pop ecx
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2022-08-07 20:10:08 +00:00
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jmp not_tty_2
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