Int 2F/AX=120Bh

DOS 3.0+ internal - SIGNAL SHARING VIOLATION TO USER

AX = 120Bh
ES:DI -> system file table entry for previous open of file.
STACK:
WORD extended error code (should be 20h--sharing violation)

Return:
CF clear if operation should be retried
CF set if operation should not be retried
AX = error code (20h) (see #01680 at INT 21/AH=59h/BX=0000h)
STACK unchanged

Notes: Can only be called during a DOS function call. Should only be called if an attempt was made to open an already-open file contrary to the sharing rules. Invokes INT 24 if SFT file opened via FCB or in compatibility mode with inheritance allowed

Category: DOS Kernel - Int 2Fh - D

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