NAME
memset — set bytes
in memory
SYNOPSIS
#include
<string.h>
void *memset(void *s, int c, size_t n);
DESCRIPTION
[CX] The functionality described on this reference page is aligned with the ISO C standard. Any conflict between the requirements described here and the ISO C standard is unintentional. This volume of POSIX.1-2024 defers to the ISO C standard.
The memset () function shall copy
c (converted to an
unsigned
char) into each of the first
n bytes of the
object pointed to by s.
[CX] The memset ()
function shall not change the setting of errno on valid
input.
RETURN VALUE
The memset () function shall return
s; no return value is reserved to indicate an error.
ERRORS
No errors are defined.
EXAMPLES
None.
APPLICATION USAGE
None.
RATIONALE
None.
FUTURE DIRECTIONS
None.
SEE ALSO
XBD <string.h>
CHANGE HISTORY
First released in Issue 1. Derived from Issue 1 of the SVID.
Issue 8
Austin Group Defect 448 is applied, adding a requirement that
memset () does not change the setting of
errno on valid input.