get_random_bytes_wait(9r)get_random_bytes_wait(9r)NAMEget_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
Specifies the address of the buffer in which the requested random bytes
are stored. 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() rou‐
tine 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 gen‐
meration */ 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)get_random_bytes_wait(9r)
