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BZERO(3)	       FreeBSD Library Functions Manual		      BZERO(3)

NAME
     bzero, explicit_bzero -- write zeroes to a	byte string

SYNOPSIS
     #include <strings.h>

     void
     bzero(void	*b, size_t len);

     #include <string.h>

     void
     explicit_bzero(void *b, size_t len);

DESCRIPTION
     The bzero() function writes len zero bytes	to the string b.  If len is
     zero, bzero() does	nothing.

     The explicit_bzero() variant behaves the same, but	will not be removed by
     a compiler's dead store optimization pass,	making it useful for clearing
     sensitive memory such as a	password.

SEE ALSO
     memset(3),	swab(3)

STANDARDS
     The bzero() function conforms to the X/Open System	Interfaces option of
     the IEEE Std 1003.1-2004 ("POSIX.1") specification.  It was removed from
     the standard in IEEE Std 1003.1-2008 ("POSIX.1"), which recommends	using
     memset(3) instead.

     The explicit_bzero() function is an OpenBSD extension.

HISTORY
     The bzero() function first	appeared in 4.2BSD.  The explicit_bzero()
     function first appeared in	OpenBSD	5.5.

FreeBSD	13.0		       October 12, 2017			  FreeBSD 13.0
NAME | SYNOPSIS | DESCRIPTION | SEE ALSO | STANDARDS | HISTORY

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