1  /*
       2   * This file is part of caps strace test.
       3   *
       4   * Copyright (c) 2014-2021 Dmitry V. Levin <ldv@strace.io>
       5   * All rights reserved.
       6   *
       7   * SPDX-License-Identifier: GPL-2.0-or-later
       8   */
       9  
      10  #include "tests.h"
      11  #include <errno.h>
      12  #include <string.h>
      13  
      14  extern int capget(int *, int *);
      15  extern int capset(int *, const int *);
      16  
      17  int
      18  main(void)
      19  {
      20  	const int data[] = { 2, 4, 0, 8, 16, 0 };
      21  	const int v1 = 0x19980330;
      22  	const int v2 = 0x20071026;
      23  	const int v3 = 0x20080522;
      24  
      25  	int * const head = tail_alloc(sizeof(int) * 2);
      26  	head[0] = v3;
      27  	head[1] = 0;
      28  	int * const tail_data = tail_alloc(sizeof(data));
      29  
      30  	capget(NULL, NULL);
      31  	capget(head + 2, tail_data);
      32  	capget(head, tail_data + ARRAY_SIZE(data));
      33  
      34  	if (capget(head, tail_data))
      35  		perror_msg_and_skip("capget");
      36  	if (head[0] != v3)
      37  		error_msg_and_skip("capget: v3 expected");
      38  
      39  	memcpy(tail_data, data, sizeof(data));
      40  
      41  	capset(NULL, NULL);
      42  	capset(head + 2, tail_data);
      43  
      44  	head[0] = 0xbadc0ded;
      45  	head[1] = 2718281828U;
      46  	capset(head, tail_data + ARRAY_SIZE(data) - 2);
      47  
      48  	head[0] = v2;
      49  	head[1] = 0;
      50  	capset(head, tail_data + ARRAY_SIZE(data) - 5);
      51  
      52  	memcpy(tail_data, data, sizeof(data));
      53  	head[0] = v3;
      54  	if (capset(head, tail_data) == 0 || errno != EPERM)
      55  		perror_msg_and_skip("capset");
      56  
      57  	memset(tail_data, 0, sizeof(data) / 2);
      58  	if (capset(head, tail_data) == 0 || errno != EPERM)
      59  		perror_msg_and_skip("capset");
      60  
      61  	memcpy(tail_data + ARRAY_SIZE(data) / 2, data, sizeof(data) / 2);
      62  	head[0] = v1;
      63  	if (capset(head, tail_data + ARRAY_SIZE(data) / 2) == 0 ||
      64  	    errno != EPERM)
      65  		perror_msg_and_skip("capset");
      66  
      67  	return 0;
      68  }