1  /*
       2   * Check decoding of fsopen syscall.
       3   *
       4   * Copyright (c) 2019-2021 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 "scno.h"
      12  
      13  #include <stdio.h>
      14  #include <stdint.h>
      15  #include <unistd.h>
      16  
      17  static const char *errstr;
      18  
      19  static long
      20  k_fsopen(const void *name, const unsigned int flags)
      21  {
      22  	const kernel_ulong_t fill = (kernel_ulong_t) 0xdefaced00000000ULL;
      23  	const kernel_ulong_t bad = (kernel_ulong_t) 0xbadc0dedbadc0dedULL;
      24  	const kernel_ulong_t arg1 = (uintptr_t) name;
      25  	const kernel_ulong_t arg2 = fill | flags;
      26  	const long rc = syscall(__NR_fsopen, arg1, arg2, bad, bad, bad, bad);
      27  	errstr = sprintrc(rc);
      28  	return rc;
      29  }
      30  
      31  int
      32  main(void)
      33  {
      34  	char *const name1 = tail_alloc(DEFAULT_STRLEN + 2);
      35  	char *const name = name1 + 1;
      36  	const void *const efault = name + DEFAULT_STRLEN + 1;
      37  	const char *const empty = efault - 1;
      38  	fill_memory_ex(name1, DEFAULT_STRLEN + 1, '0', 10);
      39  	name1[DEFAULT_STRLEN + 1] = '\0';
      40  
      41  	k_fsopen(name, 0);
      42  	printf("fsopen(\"%s\", 0) = %s\n", name, errstr);
      43  
      44  	k_fsopen(name1, 1);
      45  	printf("fsopen(\"%.*s\"..., FSOPEN_CLOEXEC) = %s\n",
      46  	       DEFAULT_STRLEN, name1, errstr);
      47  
      48  	k_fsopen(0, 2);
      49  	printf("fsopen(NULL, 0x2 /* FSOPEN_??? */) = %s\n", errstr);
      50  
      51  	k_fsopen(efault, 0xfffffffe);
      52  	printf("fsopen(%p, 0xfffffffe /* FSOPEN_??? */) = %s\n", efault, errstr);
      53  
      54  	k_fsopen(empty, -1);
      55  	printf("fsopen(\"\", FSOPEN_CLOEXEC|0xfffffffe) = %s\n", errstr);
      56  
      57  	puts("+++ exited with 0 +++");
      58  	return 0;
      59  }