Function kern_cap_ioctls_limit

freebsd/kern/sys_capability.c:418–459

}

int
kern_cap_ioctls_limit(struct thread *td, int fd, u_long *cmds, size_t ncmds)
{
	struct filedesc *fdp;
	struct filedescent *fdep;
	u_long *ocmds;
	int error;

	AUDIT_ARG_FD(fd);

	if (ncmds > IOCTLS_MAX_COUNT) {
		error = EINVAL;
		goto out_free;
	}

	fdp = td->td_proc->p_fd;
	FILEDESC_XLOCK(fdp);

	fdep = fdeget_locked(fdp, fd);
	if (fdep == NULL) {
		error = EBADF;
		goto out;
	}

	error = cap_ioctl_limit_check(fdep, cmds, ncmds);
	if (error != 0)
		goto out;

	ocmds = fdep->fde_ioctls;
	seqc_write_begin(&fdep->fde_seqc);
	fdep->fde_ioctls = cmds;
	fdep->fde_nioctls = ncmds;
	seqc_write_end(&fdep->fde_seqc);

	cmds = ocmds;
	error = 0;
out:
	FILEDESC_XUNLOCK(fdp);
out_free:
	free(cmds, M_FILECAPS);
	return (error);
}

int
sys_cap_ioctls_limit(struct thread *td, struct cap_ioctls_limit_args *uap)