en:docs:dos:api:int21:43:00

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Note: This API call is for DOS and Win16 personality only. Use Family API for portability.

2018/09/07 05:04 · prokushev · 0 Comments

Int 21H, AH=43H, AL=00H

Version

2 and higher

Brief

GET FILE ATTRIBUTES

Family API

Input

  • AX = 4300h
  • DS:DX → ASCIZ filename

Return

  • CF clear if successful
    • CX = file attributes (see #01420)
    • AX = CX (DR DOS 5.0)
  • CF set on error
    • AX = error code (01h,02h,03h,05h) (see #01680 at AH=59h)

Macro

Notes

Bitfields for file attributes:

Bit(s) Description
7 unused
6 unused
5 archive
4 directory
3 volume label
2 system
1 hidden
0 read-only

under DR DOS 3.41 and 5.0, attempts to change the subdirectory bit are simply ignored without an error

BUG: Windows for Workgroups returns error code 05h (access denied) instead of error code 02h (file not found) when attempting to get the attributes of a nonexistent file. This causes open() with O_CREAT and fopen() with the “w” mode to fail in Borland C++.

See also

AX=4301h,AX=7143h

Note

2018/09/04 17:23 · prokushev · 0 Comments