scc

 1#include <string.h>
 2
 3#undef strcpy
 4
 5char *
 6strcpy(char *restrict s1, const char *restrict s2)
 7{
 8	char *ret = s1;
 9
10	while ((*s1++ = *s2++) != '\0')
11		;
12
13	return ret;
14}