Index for Section 9r

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get_random_bytes_wait(9r)
NAME
  get_random_bytes_wait - General: Returns the requested number of random
  bytes and places them in a buffer.

SYNOPSIS
  void get_random_bytes_wait(
	  void *buf,
	  int nbytes );

ARGUMENTS
  buf Specifies the address of the buffer in which the requested random bytes
      are stored.

  nbytes
      Specifies the number of random bytes.

DESCRIPTION
  The get_random_bytes_wait() routine returns the requested number of random
  bytes and places them in a buffer. This routine is for kernel modules that
  can be in a wait state.

RETURN VALUES
  Upon successful completion, get_random_bytes_wait() returns a buffer filled
  with random bytes.

  ************Fran, what does it return upon failure, efault?

EXAMPLE
  The following example shows how to use the get_random_bytes_wait() routine
  to generate a random DCE UUID:

       unsigned char uuid[16];
       get_random_bytes_wait(uuid, sizeof (uuid));
       uuid[6] = (uuid[6] & 0x0f) | 0x40;     /* UUID version 4 -- random genmeration */
       uuid[8] = (uuid[8] & 0x3f) | 0x80;     /* UUID variant DCE */

  ************Fran, can you send me an example for this routine too? I just
  copied the example that you gave me for the other one. Thanks.

SEE ALSO
  Routines: get_random_bytes(9r)

  Files: random(4) and urandom(4)

Index for Section 9r

Alphabetical listing for G

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