wget output filename
To download a file using the wget
command in Assembly language, you would typically use the system call int 0x80
to invoke the appropriate system function. The specific details of the code will depend on the operating system and the assembler being used.
Here is an example of how you can use the wget
command in Assembly language to download a file:
section .data
url db 'http://example.com/file.txt', 0
filename db 'output.txt', 0
section .text
global _start
_start:
; Open the output file
mov eax, 5 ; sys_open
mov ebx, filename
mov ecx, 2 ; O_WRONLY | O_CREAT
mov edx, 0644 ; file permissions
int 0x80
; Check if the file was opened successfully
cmp eax, -1
je error
; Save the file descriptor
mov ebx, eax
; Open the URL
mov eax, 5 ; sys_open
mov ebx, url
mov ecx, 0 ; O_RDONLY
int 0x80
; Check if the URL was opened successfully
cmp eax, -1
je error
; Save the file descriptor
mov edx, eax
; Read from the URL and write to the output file
mov eax, 3 ; sys_read
mov ebx, edx ; URL file descriptor
mov ecx, buffer
mov edx, buffer_size
int 0x80
; Check if the read was successful
cmp eax, -1
je error
; Save the number of bytes read
mov ecx, eax
; Write to the output file
mov eax, 4 ; sys_write
mov ebx, ebx ; output file descriptor
mov edx, ecx ; number of bytes to write
int 0x80
; Check if the write was successful
cmp eax, -1
je error
; Close the output file
mov eax, 6 ; sys_close
mov ebx, ebx ; output file descriptor
int 0x80
; Close the URL
mov eax, 6 ; sys_close
mov ebx, edx ; URL file descriptor
int 0x80
; Exit the program
mov eax, 1 ; sys_exit
xor ebx, ebx ; exit status
int 0x80
error:
; Handle the error condition
; ...
section .bss
buffer resb buffer_size
buffer_size equ 4096
Please note that this is just a basic example and may not work as-is. You may need to modify the code to suit your specific needs and environment.
I hope this helps! Let me know if you have any further questions.