EXPLICIT_BZERO(3bsd) | 3bsd | EXPLICIT_BZERO(3bsd) |
NAME¶
explicit_bzero
—
write zeroes to a byte string
LIBRARY¶
library “libbsd”
SYNOPSIS¶
#include
<string.h>
(See libbsd(7)
for include usage.)
void
explicit_bzero
(void
*buf, size_t
len);
DESCRIPTION¶
The
explicit_bzero
()
function writes len zero bytes to the string
buf. If len is zero,
explicit_bzero
() does nothing.
The
explicit_bzero
()
variant behaves the same as the
bzero
()
function, 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¶
HISTORY¶
The explicit_bzero
() function first
appeared in OpenBSD 5.5, glibc 2.25.
January 22, 2014 | Debian |