1  /*
       2   * Copyright (c) 2016-2023 The strace developers.
       3   * All rights reserved.
       4   *
       5   * SPDX-License-Identifier: GPL-2.0-or-later
       6   */
       7  
       8  #include "tests.h"
       9  #include "scno.h"
      10  
      11  #ifdef __NR_link
      12  
      13  # include <stdio.h>
      14  # include <string.h>
      15  # include <unistd.h>
      16  
      17  int
      18  main(void)
      19  {
      20  	static const char sample_1_str[] = "link_sample_old";
      21  	static const char sample_2_str[] = "link_sample_new";
      22  
      23  	TAIL_ALLOC_OBJECT_CONST_ARR(char, sample_1, sizeof(sample_1_str));
      24  	TAIL_ALLOC_OBJECT_CONST_ARR(char, sample_2, sizeof(sample_2_str));
      25  	TAIL_ALLOC_OBJECT_CONST_ARR(char, short_1, sizeof(sample_1_str) - 1);
      26  	TAIL_ALLOC_OBJECT_CONST_ARR(char, short_2, sizeof(sample_2_str) - 1);
      27  
      28  	long rc;
      29  
      30  	memcpy(sample_1, sample_1_str, sizeof(sample_1_str));
      31  	memcpy(sample_2, sample_2_str, sizeof(sample_2_str));
      32  	memcpy(short_1, sample_1_str, sizeof(sample_1_str) - 1);
      33  	memcpy(short_2, sample_2_str, sizeof(sample_2_str) - 1);
      34  
      35  	rc = syscall(__NR_link, NULL, NULL);
      36  # ifndef PATH_TRACING
      37  	printf("link(NULL, NULL) = %ld %s (%m)\n", rc, errno2name());
      38  # endif
      39  
      40  	rc = syscall(__NR_link, short_1, NULL);
      41  # ifndef PATH_TRACING
      42  	printf("link(%p, NULL) = %ld %s (%m)\n",
      43  	       short_1, rc, errno2name());
      44  # endif
      45  
      46  	rc = syscall(__NR_link, NULL, sample_1);
      47  	printf("link(NULL, \"%s\") = %ld %s (%m)\n",
      48  	       sample_1_str, rc, errno2name());
      49  
      50  	rc = syscall(__NR_link, sample_1, short_2);
      51  	printf("link(\"%s\", %p) = %ld %s (%m)\n",
      52  	       sample_1_str, short_2, rc, errno2name());
      53  
      54  	rc = syscall(__NR_link, short_1, sample_2);
      55  # ifndef PATH_TRACING
      56  	printf("link(%p, \"%s\") = %ld %s (%m)\n",
      57  	       short_1, sample_2_str, rc, errno2name());
      58  # endif
      59  
      60  	rc = syscall(__NR_link, sample_1, sample_2);
      61  	printf("link(\"%s\", \"%s\") = %ld %s (%m)\n",
      62  	       sample_1_str, sample_2_str, rc, errno2name());
      63  
      64  	puts("+++ exited with 0 +++");
      65  	return 0;
      66  }
      67  
      68  #else
      69  
      70  SKIP_MAIN_UNDEFINED("__NR_link")
      71  
      72  #endif