我正在尝试挂钩www.example.com挂钩函数。unlinkat.my hooking function.
但是我只得到文件名而不是绝对www.example.com我想要绝对路径来比较字符串。当我尝试rm-r时，我只得到文件名，如果我得到绝对路径，那么它www.example.com请告诉我如何得到绝对路径。 path.so i want absolute path to compare string.when i try rm -r than i get only file name if i get absolute path then it works.so please tell me how i get absolute path.
我的密码是

long mw_sys_unlink(int dfd, const char *filename ,int flag)
{
        long ret;
        if( strstr(filename,"/tmp/a/"))
        {
                printk(KERN_INFO "file %s has not been deleted by kernel module\n", filename);
                return -1;
        }
        else
        {
                ret = orig_sys_unlink(dfd ,filename,flag);
                printk(KERN_INFO "file %s has been deleted", filename);
                return ret;
        }
}