| GETENTROPY(3C) | Standard C Library Functions | GETENTROPY(3C) |
getentropy — get
entropy
#include
<unistd.h>
int
getentropy(void
*buf, size_t
buflen);
getentropy fills a buffer with
high-quality entropy, which can be used as input for process-context
pseudorandom generators like
arc4random(3C).
The maximum buffer size permitted is 256 bytes. If
buflen exceeds this, an error of
EIO will be indicated.
getentropy is not intended for regular
code; please use the
arc4random(3C) family of
functions instead.
Upon successful completion, the value 0 is returned; otherwise the value -1 is returned and the global variable errno is set to indicate the error.
getentropy() will succeed unless:
| December 31, 2014 | OmniOS |