9971 Make getrandom(2) a public interface

          --- old/usr/src/lib/libc/port/gen/getentropy.c
          +++ new/usr/src/lib/libc/port/gen/getentropy.c

   1    1  /*
   2    2   * This file and its contents are supplied under the terms of the

   3    3   * Common Development and Distribution License ("CDDL"), version 1.0.
   4    4   * You may only use this file in accordance with the terms of version
   5    5   * 1.0 of the CDDL.
   6    6   *
   7    7   * A full copy of the text of the CDDL should have accompanied this
   8    8   * source.  A copy of the CDDL is also available via the Internet at
   9    9   * http://www.illumos.org/license/CDDL.
  10   10   */
  11   11  
  12   12  /*
  13      - * Copyright (c) 2015, Joyent, Inc.
       13 + * Copyright (c) 2018, Joyent, Inc.
  14   14   */
  15   15  
  16   16  /*
  17   17   * getentropy(3C) is an OpenBSD compatible wrapper around getrandom(2).
  18   18   */
  19   19  
  20   20  #include <errno.h>
  21   21  #include <sys/random.h>
  22   22  
  23   23  int
  24   24  getentropy(void *buf, size_t buflen)
  25   25  {
  26      -        int ret;
       26 +        ssize_t ret;
  27   27  
  28   28          if (buflen > 256) {
  29   29                  errno = EIO;
  30   30                  return (-1);
  31   31          }
  32   32  
  33   33          ret = getrandom(buf, buflen, 0);
  34   34          if (ret == -1 || ret != buflen) {
  35   35                  if (errno != EFAULT)
  36   36                          errno = EIO;
  37   37                  return (-1);
  38   38          }
  39   39  
  40   40          return (0);
  41   41  }
    

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