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REVERT_REDIR_IF_ANY:
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REVERT_REDIR_IF_ANY:
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; is stdout redirected?
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; is stdout redirected?
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mov bx, [OLD_STDOUT]
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mov bx, [OLD_STDOUT]
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cmp bx, 0xffff
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cmp bx, 0xffff
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je STDOUT_DONE
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je STDOUT_DONE
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; revert the stdout handle (dst in BX alread)
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; revert the stdout handle (dst in BX already)
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mov cx, 1        ; src handle (1=stdout)
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mov cx, 1        ; src handle (1=stdout)
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mov ah, 0x46     ; redirect a handle
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mov ah, 0x46     ; redirect a handle
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int 0x21
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int 0x21
- 
 
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; close the old handle (still in bx)
- 
 
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mov ah, 0x3e
- 
 
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int 0x21
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mov [OLD_STDOUT], word 0xffff ; mark stdout as "not redirected"
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mov [OLD_STDOUT], word 0xffff ; mark stdout as "not redirected"
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STDOUT_DONE:
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STDOUT_DONE:
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ret
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ret
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mov cx, 1              ; src handle (1=stdout)
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mov cx, 1              ; src handle (1=stdout)
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mov ah, 0x46           ; "redirect a handle"
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mov ah, 0x46           ; "redirect a handle"
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int 0x21
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int 0x21
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; close the original file handle, I no longer need it
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; close the original file handle, I no longer need it
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mov ah, 0x3e           ; close a file handle (handle in BX)
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mov ah, 0x3e           ; close a file handle (handle in BX)
- 
 
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int 0x21
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NO_STDOUT_REDIR:
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NO_STDOUT_REDIR:
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ret
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ret