memset(3) Library Functions Manual memset(3)

memset - fill memory with a constant byte

Standard C library (libc, -lc)

#include <string.h>
void *memset(void s[.n], int c, size_t n);

The memset() function fills the first n bytes of the memory area pointed to by s with the constant byte c.

The memset() function returns a pointer to the memory area s.

For an explanation of the terms used in this section, see attributes(7).

Interface Attribute Value
memset () Thread safety MT-Safe

C11, POSIX.1-2008.

POSIX.1-2001, C89, SVr4, 4.3BSD.

bstring(3), bzero(3), swab(3), wmemset(3)

2023-10-31 Linux man-pages 6.7