text: /*-
   * Copyright (c) 2002 Networks Associates Technology, Inc.
   * All rights reserved.
   *
   * This software was developed for the FreeBSD Project by NAI Labs,
   * the Security Research Division of Network Associates, Inc. under
   * DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA
   * CHATS research program.
   *
   * 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.
   */
  
  #include <sys/cdefs.h>
  __FBSDID("$FreeBSD: releng/11.0/sys/libkern/strvalid.c 140960 2005-01-29 13:34:22Z rwatson $");
  
  #include <sys/types.h>
  #include <sys/libkern.h>
  
  /*
   * Return (1) if the buffer pointed to by kernel pointer 'buffer' and
   * of length 'bufferlen' contains a valid NUL-terminated string
   */
  int
  strvalid(const char *buffer, size_t bufferlen)
  {
  	size_t i;
  
  	/* Must be NUL-terminated. */
  	for (i = 0; i < bufferlen; i++)
  		if (buffer[i] == '\0')
  			return (1);
  
  	return (0);
  }
  