9971 Make getrandom(2) a public interface

*** 21,31 ****
  /*
   * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  /*
!  * Copyright (c) 2015, Joyent, Inc.
   * Copyright 2013 Nexenta Systems, Inc.  All rights reserved.
   */
  
  #ifndef _SYS_RANDOM_H
  #define _SYS_RANDOM_H
--- 21,31 ----
  /*
   * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  /*
!  * Copyright (c) 2018, Joyent, Inc.
   * Copyright 2013 Nexenta Systems, Inc.  All rights reserved.
   */
  
  #ifndef _SYS_RANDOM_H
  #define _SYS_RANDOM_H
*** 66,81 ****
  extern int random_get_pseudo_bytes(uint8_t *, size_t);
  
  #endif /* _KERNEL */
  
  /*
!  * Flags for the getrandom system call. Note, we may want to move these
!  * definitions if we expose getrandom(2) into a public system call.
   */
  #define GRND_NONBLOCK   0x0001          /* O_NONBLOCK equiv */
  #define GRND_RANDOM     0x0002          /* Use /dev/random, not /dev/urandom */
! extern int getrandom(void *, size_t, int);
  
  #ifdef  __cplusplus
  }
  #endif
  
--- 66,80 ----
  extern int random_get_pseudo_bytes(uint8_t *, size_t);
  
  #endif /* _KERNEL */
  
  /*
!  * Flags for the getrandom(2) system call.
   */
  #define GRND_NONBLOCK   0x0001          /* O_NONBLOCK equiv */
  #define GRND_RANDOM     0x0002          /* Use /dev/random, not /dev/urandom */
! extern ssize_t getrandom(void *, size_t, unsigned int);
  
  #ifdef  __cplusplus
  }
  #endif