ref: ec4c79f3a6ed97ec0c407a870827382cbefb1166
dir: /src/libc/string/strncpy.c/
#include <string.h>
#undef strncpy
char *
strncpy(char *restrict s1, const char *restrict s2, size_t n)
{
	char *ret = s1;
	for (; n > 0 && *s2; --n)
		*s1++ = *s2++;
	while (n-- > 0)
		*s1++ = '\0';
	return ret;
}