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spyfile.c
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spyfile.c
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/*
Monitors file changes
(c) 2006-2007 Vladimir Dubrovin, 3APA3A
http://securityvulns.com/
http://securityvulns.ru/
*/
#include <stdio.h>
#include <windows.h>
int main(int argc, char * argv[]){
HANDLE h;
int n;
char buf[10240];
if(argc != 2) {
printf(
"Usage: %s <file_path>\n"
" Monitor file cheanges\n"
" keep access to the file even after file permissions have changed\n"
"(c) Vladimir Dubrovin, 3APA3A\n"
" http://securityvulns.com\n"
" http://securityvulns.ru\n",
argv[0]);
return 1;
}
for(;(
h=CreateFile(argv[1],
GENERIC_READ,
FILE_SHARE_WRITE|FILE_SHARE_READ|FILE_SHARE_DELETE,
NULL,
OPEN_ALWAYS,
FILE_FLAG_BACKUP_SEMANTICS,
NULL
)
) == INVALID_HANDLE_VALUE;);
for(;;){
SetFilePointer(h, 0, 0, FILE_CURRENT);
n = 0;
ReadFile(h, buf, 10240, (LPDWORD)&n, NULL);
if(n>0) write(1, buf, n);
/*
we need to sleep here or we get 0 data after file size have changed but
data is not actually written
*/
Sleep(1000);
}
return 0;
}