You have to scan the directory. Depending upon your SO, this is done by different ways. For example, if you are in DOS environment, which is what I assume by the tools you are using, this is accomplished by using function 4Eh
of int 21h
. Then, you can use service 4Fh
to get subsequents files.
DS:DX
must point to the ASCIIZ string containing the path where you want to search for files. The path must include the file name, or some kind of wilcard (for example *.*
if you want to scan the complete directory). This is for function 4Eh
. Function 4Fh
resumes the scan from the file following the one that was found by function 4Eh
or a previous call to function 4Fh
.
A code for this would be:
;setup a DTA for scanning directories
mov dx,offset of your DTA block
mov ax,segment of your DTA block (normally your current data segment)
mov ds,ax
mov ah,1Ah
int 21h
;setup registers for int 21h,4Eh
;including DS:DX = ASCIIZ string with path and possibly, wilcard.
;......
;......
mov ah,4Eh
int 21h
cmp cx,0
jnz NoMoreFiles
NextFile:
;Parse DTA to obtain filename and extension of the first file found (at offset 30d)
;......
;......
mov ah,4Fh
int 21h
jc NoMoreFiles
jmp NextFile
NoMoreFiles:
More details about what DOS services to use and what parameters they expect, here: http://bbc.nvg.org/doc/Master%20512%20Technical%20Guide/m512techb_int21.htm