bzero - write zero-valued bytes
void bzero(void *s, size_t n);
The bzero() function sets the first n bytes of the byte area starting
at s to zero (bytes containing '\0').
4.3BSD. This function is deprecated (marked as LEGACY in
POSIX.1-2001): use memset(3) in new programs. POSIX.1-2008 removes the
specification of bzero().
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