Function 5Bh Create New File (DOS 3.x) Given an ASCIIZ pathname, Creates a file in the current or specified directory on the default or specified disk drive, and returns a handle that can be used by the program for subsequent access to the file. If a file with the same name already exists, the function fails. entry AH 5Bh CX attribute 00h normal 01h read only 02h hidden 04h system DS:DX segment:offset of ASCIIZ pathname return AX handle CF set if error AX error code note 1) Files created with this function are not automatically deleted when the caling program terminates. 2) The funciton fails if: a) any element of the pathname does not exist. b) a file with the identical pathname (i.e., the same filename and extension in the same location in the directory structure) already exists.) c) the file is being created in the root directory and the root directory is full. d) the program is running on a network and the user has insufficient access rights to the directory that will contain the file. 3) This function may be used to implement semaphores in a network or multitasking environment. If the function succeeds, the program has aquired the semaphone. To release the semaphore, thr program dimply deletes the file. 4) See also Int\21f\3C. The two calls are identical, except that Function 5B fails if a file with the same name already exists, rather than truncating the file to zero length. Int\21f\5A provides additional facilities for creating temporary work files.
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