NAME

       memset - fill memory with a constant byte

LIBRARY

       Standard C library (libc, -lc)

SYNOPSIS

       #include <string.h>

       void *memset(size_t n;
                    void s[n], int c, size_t n);

DESCRIPTION

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

RETURN VALUE

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

ATTRIBUTES

       For an explanation of the terms used in this section, see attributes(7).
       ┌─────────────────────────────────────────────────────────────────────────────┬───────────────┬─────────┐
       │ Interface                                                                   │ Attribute     │ Value   │
       ├─────────────────────────────────────────────────────────────────────────────┼───────────────┼─────────┤
       │ memset()                                                                    │ Thread safety │ MT-Safe │
       └─────────────────────────────────────────────────────────────────────────────┴───────────────┴─────────┘

STANDARDS

       C11, POSIX.1-2008.

HISTORY

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

SEE ALSO

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

Linux man-pages 6.15                               2025-06-28                                          memset(3)