memset(3) Library Functions Manual memset(3) NAME memset - fill memory with a constant byte LIBRARY Standard C library (libc, -lc) SYNOPSIS #include void *memset(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 6.13 2024-07-23 memset(3)