memset - fill memory with a constant byte
#include <string.h>
void *memset(void *s, int c, size_t n);
The memset() function fills the first n bytes of the mem
ory area pointed to by s with the constant byte c.
The memset() function returns a pointer to the memory area
s.
SVID 3, BSD 4.3, ISO 9899
bzero(3), swab(3)