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Copyright 1991 David Jurgens |
INT 21,4E - Find First Matching File
AH = 4E
CX = attribute used during search (see FILE ATTRIBUTES)
DS:DX = pointer to ASCIIZ filespec, including wildcards
on return:
AX = error code if CF set (see DOS ERROR CODE)
DTA = data returned from call in the format:
Offset Size Description
00 byte attribute of search (undocumented)
byte drive letter used in search (DOS 3.1-4.x, undocumented)
01 byte drive letter used in search (undocumented)
11bytes search name used (DOS 3.1-4.x, undocumented)
02 11bytes search name used (undocumented)
0C byte attribute of search (DOS 3.1-4.x, undocumented)
0D word directory entry number (0 based, undocumented)
0F word starting cluster number of current directory; zero
for root directory (DOS 3.2+, undocumented)
dword pointer to DTA (DOS 2.x-3.1, undocumented)
11 word reserved
13 word starting cluster number of current directory; zero
for root directory (DOS 2.x+, undocumented)
15 byte attribute of matching file
16 word file time (see FILE ATTRIBUTES)
18 word file date (see FILE ATTRIBUTES)
1A word file size
1E 13bytes ASCIIZ filename and extension in the form NAME.EXT
with blanks stripped
- returns information on first file matching specifications
- use INT 21,4F to retrieve following file matches
- DOS 2.x cannot find . and .. entries, while DOS 3.x can unless
they represent the root directory
- character devices return a zero for size, time and date in DOS 2.x,
while DOS 3.0 returns a 40h attribute and current time and date.
- multiple calls to this function with a character device will
result in unpredictable results
- normal files are always included along with files that match the
requested attributes except when the LABEL attribute is requested.
DOS 2.x returns all normal files when label is specified but 3.x
doesn't. It's up to the programmer to determine which actually
match the requested attributes.
- bit 8 of CX (file attributes) indicates Novell Netware shareable
- see INT 21,1A
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| Esc or Alt-X to exit |
int 21,4e |
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