#include <string.h>
void *
memset(void *b, int c, size_t len);
The memset() function writes len bytes of value c (converted to an
unsigned char) to the string b.
The memset() function returns its first argument.
bzero(3), swab(3)
The memset() function conforms to ISO/IEC 9899:1990 (``ISO C90'').
BSD June 4, 1993 BSD