text: /*
   * Copyright (c) 2000, 2001, 2002, 2003, 2004, 2005, 2008, 2009
   *	The President and Fellows of Harvard College.
   *
   * 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.
   * 3. Neither the name of the University nor the names of its contributors
   *    may be used to endorse or promote products derived from this software
   *    without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE UNIVERSITY 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 UNIVERSITY 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.
   */
  
  /*
   * Calls with invalid transfer buffers
   */
  
  #include <sys/types.h>
  #include <sys/stat.h>
  #include <stdio.h>
  #include <stdlib.h>
  #include <string.h>
  #include <unistd.h>
  #include <limits.h>
  #include <errno.h>
  #include <err.h>
  
  #include "config.h"
  #include "test.h"
  
  static int buf_fd;
  
  struct buftest {
  	int (*setup)(void);
  	int (*op)(void *);
  	void (*cleanup)(void);
  	const char *name;
  };
  
  ////////////////////////////////////////////////////////////
  
  static
  int
  read_setup(void)
  {
  	buf_fd = open_testfile("i do not like green eggs and ham");
  	if (buf_fd<0) {
  		return -1;
  	}
  	return 0;
  }
  
  static
  int
  read_badbuf(void *buf)
  {
  	return read(buf_fd, buf, 128);
  }
  
  static
  void
  read_cleanup(void)
  {
  	close(buf_fd);
  	remove(TESTFILE);
  }
  
  //////////
  
  static
  int
  write_setup(void)
  {
  	buf_fd = open_testfile(NULL);
  	if (buf_fd<0) {
  		return -1;
  	}
  	return 0;
  }
  
  static
  int
  write_badbuf(void *ptr)
  {
  	return write(buf_fd, ptr, 128);
  }
  
  static
  void
  write_cleanup(void)
  {
  	close(buf_fd);
  	remove(TESTFILE);
  }
  
  //////////
  
  static
  int
  getdirentry_setup(void)
  {
  	buf_fd = open(".", O_RDONLY);
  	if (buf_fd < 0) {
  		warn("UH-OH: couldn't open .");
  		return -1;
  	}
  	return 0;
  }
  
  static
  int
  getdirentry_badbuf(void *ptr)
  {
  	return getdirentry(buf_fd, ptr, 1024);
  }
  
  static
  void
  getdirentry_cleanup(void)
  {
  	close(buf_fd);
  }
  
  //////////
  
  static
  int
  readlink_setup(void)
  {
  	return create_testlink();
  }
  
  static
  int
  readlink_badbuf(void *buf)
  {
  	return readlink(TESTLINK, buf, 168);
  }
  
  static
  void
  readlink_cleanup(void)
  {
  	remove(TESTLINK);
  }
  
  //////////
  
  static int getcwd_setup(void) { return 0; }
  static void getcwd_cleanup(void) {}
  
  static
  int
  getcwd_badbuf(void *buf)
  {
  	return __getcwd(buf, 408);
  }
  
  ////////////////////////////////////////////////////////////
  
  static
  int
  common_badbuf(struct buftest *info, void *buf, const char *bufdesc)
  {
  	int rv;
  	int result;
  
  	report_begin("%s with %s buffer", info->name, bufdesc);
  	info->setup();
  	rv = info->op(buf);
  	result = report_check(rv, errno, EFAULT);
  	info->cleanup();
  	return result;
  }
  
  static
  int
  any_badbuf(struct buftest *info, int *ntests, int *lost_points)
  {
  	int result;
  
  	*ntests += 1;
  	result = common_badbuf(info, NULL, "NULL");
  	handle_result(result, lost_points);
  
  	*ntests += 1;
  	result = common_badbuf(info, INVAL_PTR, "invalid");
  	handle_result(result, lost_points);
  
  	*ntests += 1;
  	result = common_badbuf(info, KERN_PTR, "kernel-space");
  	handle_result(result, lost_points);
  
  	return result;
  }
  
  ////////////////////////////////////////////////////////////
  
  #define T(call) \
    void					\
    test_##call##_buf(int *ntests, int *lost_points)		\
    {					\
    	static struct buftest info = {	\
    		call##_setup,		\
    		call##_badbuf,		\
    		call##_cleanup,		\
    		#call,			\
  	};				\
     	any_badbuf(&info, ntests, lost_points);	\
    }
  
  T(read);
  T(write);
  T(getdirentry);
  T(readlink);
  T(getcwd);
  