1  /*
       2   * Copyright (c) 2016-2021 Dmitry V. Levin <ldv@strace.io>
       3   * All rights reserved.
       4   *
       5   * SPDX-License-Identifier: GPL-2.0-or-later
       6   */
       7  
       8  #include "tests.h"
       9  #include <assert.h>
      10  #include <unistd.h>
      11  #include <sys/stat.h>
      12  
      13  #define N_FDS 3
      14  
      15  /*
      16   * Do not print any messages, indicate errors with return codes.
      17   */
      18  static int
      19  check_fd(int fd, const char *fname)
      20  {
      21  	const int should_be_closed = (fname[0] == '\0');
      22  
      23  	struct stat st_fd, st_fn;
      24  
      25  	if (fstat(fd, &st_fd)) {
      26  		if (!should_be_closed)
      27  			return 10 + fd;
      28  	} else {
      29  		if (should_be_closed)
      30  			return 20 + fd;
      31  
      32  		if (stat(fname, &st_fn))
      33  			return 30 + fd;
      34  
      35  		if (st_fd.st_dev != st_fn.st_dev
      36  		    || st_fd.st_ino != st_fn.st_ino)
      37  			return 40 + fd;
      38  	}
      39  
      40  	return 0;
      41  }
      42  
      43  int
      44  main(int ac, char **av)
      45  {
      46  	assert(ac == 1 + N_FDS);
      47  
      48  	int rc = 0;
      49  	for (int fd = 1; fd < 1 + N_FDS; ++fd)
      50  		if ((rc = check_fd(fd - 1, av[fd])))
      51  			break;
      52  
      53  	return rc;
      54  }