text: /* Copyright 2019, Google Inc.  All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are
   * met:
   *
   *     * Redistributions of source code must retain the above copyright
   * notice, this list of conditions and the following disclaimer.
   *     * Redistributions in binary form must reproduce the above
   * copyright notice, this list of conditions and the following disclaimer
   * in the documentation and/or other materials provided with the
   * distribution.
   *     * Neither the name of Google Inc. nor the names of its
   * contributors may be used to endorse or promote products derived from
   * this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
   * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  #include "test_skel.h"
  
  int
  main(int argc, char* argv[])
  {
      int fd = 0, mode = 0;
      loff_t offset = 0, len = 0;
  
      // Bad file descriptor.
      fd = -1;
      assert(sys_fallocate(fd, mode, offset, len) == -1);
      assert(errno == EBADF);
  
      char filename[] = "tempfile.XXXXXX";
      fd = mkstemp(filename);
      assert(fd >= 0);
  
      // Invalid len.
      assert(sys_fallocate(fd, mode, offset, len) == -1);
      assert(errno == EINVAL);
  
      // Small offset and length succeeds.
      len = 4096;
      assert(sys_fallocate(fd, mode, offset, len) == 0);
  
      // Large offset succeeds and isn't truncated.
      offset = 1llu + UINT32_MAX;
      assert(sys_fallocate(fd, mode, offset, len) == 0);
  
  #if defined(__NR_fstat64)
      struct kernel_stat64 st;
      assert(sys_fstat64(fd, &st) == 0);
  #else
      struct kernel_stat st;
      assert(sys_fstat(fd, &st) == 0);
  #endif
      assert(st.st_size == offset + len);
  
      sys_unlink(filename);
  
      return 0;
  }
  