1  /*
       2   * Check decoding of close_range syscall.
       3   *
       4   * Copyright (c) 2020-2021 The strace developers.
       5   * All rights reserved.
       6   *
       7   * SPDX-License-Identifier: GPL-2.0-or-later
       8   */
       9  
      10  #include "tests.h"
      11  #include "scno.h"
      12  
      13  #include <fcntl.h>
      14  #include <stdio.h>
      15  #include <unistd.h>
      16  #include <linux/close_range.h>
      17  
      18  static const char *errstr;
      19  
      20  static long
      21  k_close_range(const unsigned int fd1, const unsigned int fd2, const unsigned int flags)
      22  {
      23  	const kernel_ulong_t fill = (kernel_ulong_t) 0xdefaced00000000ULL;
      24  	const kernel_ulong_t bad = (kernel_ulong_t) 0xbadc0dedbadc0dedULL;
      25  	const kernel_ulong_t arg1 = fill | fd1;
      26  	const kernel_ulong_t arg2 = fill | fd2;
      27  	const kernel_ulong_t arg3 = fill | flags;
      28  	const long rc = syscall(__NR_close_range, arg1, arg2, arg3, bad, bad, bad);
      29  	errstr = sprintrc(rc);
      30  	return rc;
      31  }
      32  
      33  int
      34  main(void)
      35  {
      36  	k_close_range(-2U, -1U, 1);
      37  	printf("close_range(%u, %u, 0x1 /* CLOSE_RANGE_??? */) = %s\n",
      38  	       -2U, -1U, errstr);
      39  
      40  	k_close_range(-1U, -2U, 2);
      41  	printf("close_range(%u, %u, CLOSE_RANGE_UNSHARE) = %s\n",
      42  	       -1U, -2U, errstr);
      43  
      44  	k_close_range(-3U, 0, 4);
      45  	printf("close_range(%u, 0, CLOSE_RANGE_CLOEXEC) = %s\n", -3U, errstr);
      46  
      47  	k_close_range(0, -4U, -1);
      48  	printf("close_range(0, %u"
      49  	       ", CLOSE_RANGE_UNSHARE|CLOSE_RANGE_CLOEXEC|%#x) = %s\n",
      50  	       -4U, (-1U & ~(CLOSE_RANGE_UNSHARE | CLOSE_RANGE_CLOEXEC)),
      51  	       errstr);
      52  
      53  	k_close_range(-5U, 7, 0);
      54  	printf("close_range(%u, 7, 0) = %s\n", -5U, errstr);
      55  
      56  	k_close_range(7, -6U, 1);
      57  	printf("close_range(7, %u, 0x1 /* CLOSE_RANGE_??? */) = %s\n",
      58  	       -6U, errstr);
      59  
      60  	k_close_range(7, 7, 8);
      61  	printf("close_range(7, 7, 0x8 /* CLOSE_RANGE_??? */) = %s\n", errstr);
      62  
      63  	k_close_range(-7U, -7U, 7);
      64  	printf("close_range(%u, %u"
      65  	       ", CLOSE_RANGE_UNSHARE|CLOSE_RANGE_CLOEXEC|0x1) = %s\n",
      66  	       -7U, -7U, errstr);
      67  
      68  	k_close_range(7, 0, 0);
      69  	printf("close_range(7, 0, 0) = %s\n", errstr);
      70  
      71  	k_close_range(0, 0, 0);
      72  	printf("close_range(0, 0, 0) = %s\n", errstr);
      73  
      74  	k_close_range(7, -1U, 0);
      75  	printf("close_range(7, %u, 0) = %s\n", -1U, errstr);
      76  
      77  	puts("+++ exited with 0 +++");
      78  	return 0;
      79  }