blob: 57956d09ae02a69d9dd3c17eb502cecf9c369e87 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
'\" t
.\" Copyright 2024 axtlos (axtlos@disroot.org)
.\"
.\" SPDX-License-Identifier: BSD-3-Clause
.TH memset_s 3 2024-07-14 "extlib"
.SH NAME
fcopy \- copy a file
.SH LIBRARY
extlib extended standard library
.RI ( libextlib ", " \-lextlib )
.SH SYNOPSIS
.nf
.B #define __STDC_WANT_LIB_EXT1__ 1
.P
.B #include <extlib.h>
.P
.BI "errno_t memset_s (void *s, rsize_t max, int c, rsize_t n);"
.fi
.SH DESCRIPTION
The
.BR memset_s()
function behaves the same way as
.BR memset ()
except that it will not be removed through Dead Store Elimination,
which makes it useful when sensitive data needs to be cleared.
Unlike
.BR memset()
,
.BR memset_s()
will also return an error and call the currently registered constraint handler
if
.I *s
is a null pointer,
.I max
or
.I n
is greater than RSIZE_MAX, or
.I n
is greater than max.
.fi
.SH RETURN VALUE
The
.BR memset_s ()
returns zero on success, non-zero on error.
.I *src
to
.IR *dst .
.SH STANDARDS
.BR memset_s ()
conforms to ISO/IEC 9899:2011 ("ISO C11") K.3.7.4.1.
|
