text: /*-
   * Copyright (c) 1999, 2000, 2001 Robert N. M. Watson
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   */
  /*
   * acl_init -- return a fresh acl structure
   * acl_dup -- duplicate an acl and return the new copy
   */
  
  #include <sys/cdefs.h>
  __FBSDID("$FreeBSD: releng/11.0/lib/libc/posix1e/acl_init.c 287426 2015-09-03 11:30:39Z trasz $");
  
  #include <sys/types.h>
  #include "namespace.h"
  #include <sys/acl.h>
  #include "un-namespace.h"
  #include <errno.h>
  #include <stdlib.h>
  #include <string.h>
  #include <assert.h>
  
  #include "acl_support.h"
  
  #ifndef CTASSERT
  #define CTASSERT(x)		_CTASSERT(x, __LINE__)
  #define _CTASSERT(x, y)		__CTASSERT(x, y)
  #define __CTASSERT(x, y)	typedef char __assert_ ## y [(x) ? 1 : -1]
  #endif
  
  CTASSERT(1 << _ACL_T_ALIGNMENT_BITS > sizeof(struct acl_t_struct));
  
  acl_t
  acl_init(int count)
  {
  	int error;
  	acl_t acl;
  
  	if (count > ACL_MAX_ENTRIES) {
  		errno = ENOMEM;
  		return (NULL);
  	}
  	if (count < 0) {
  		errno = EINVAL;
  		return (NULL);
  	}
  
  	error = posix_memalign((void *)&acl, 1 << _ACL_T_ALIGNMENT_BITS,
  	    sizeof(struct acl_t_struct));
  	if (error) {
  		errno = error;
  		return (NULL);
  	}
  
  	bzero(acl, sizeof(struct acl_t_struct));
  	acl->ats_brand = ACL_BRAND_UNKNOWN;
  	acl->ats_acl.acl_maxcnt = ACL_MAX_ENTRIES;
  
  	return (acl);
  }
  
  acl_t
  acl_dup(acl_t acl)
  {
  	acl_t	acl_new;
  
  	acl_new = acl_init(ACL_MAX_ENTRIES);
  	if (acl_new != NULL) {
  		*acl_new = *acl;
  		acl->ats_cur_entry = 0;
  		acl_new->ats_cur_entry = 0;
  	}
  
  	return (acl_new);
  }
  