kc3-lang/libbsd/test/closefrom.c

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• Hash : 3c305f28
  Author :
  Date : 2021-02-19T06:49:53
  

  test: Add proper prototypes for main() function Warned-by: gcc

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• test/closefrom.c

• /*
   * Copyright © 2015 Guillem Jover <guillem@hadrons.org>
   *
   * 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. The name of the author may not be used to endorse or promote products
   *    derived from this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED ``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 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 <assert.h>
  #include <errno.h>
  #include <fcntl.h>
  #include <unistd.h>
  #include <stdio.h>
  
  int
  main(int argc, char *argv[])
  {
  	int i;
  	int fd;
  
  	fd = open("/dev/null", O_RDONLY);
  
  	for (i = 4; i < 1024; i *= 2)
  		assert(dup2(fd, i) == i);
  
  	if (fd < 4)
  		close(fd);
  	closefrom(4);
  
  	for (i = 4; i < 1024; i++)
  		assert(fcntl(i, F_GETFL) == -1 && errno == EBADF);
  	assert(fcntl(fd, F_GETFL) == -1 && errno == EBADF);
  
  	return 0;
  }
  

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