memset - fill memory with a constant byte
void *memset(void *s, 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).
POSIX.1-2001, POSIX.1-2008, C89, C99, SVr4, 4.3BSD.
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