ref: 1eca33b48c25d3ee58691ea8f9d122cdf12a57a6
dir: /sys/src/ape/lib/bsd/inet_ntoa.c/
/* posix */
#include <sys/types.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
/* bsd extensions */
#include <sys/uio.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <sys/un.h>
char*
inet_ntoa(struct in_addr in)
{
static char s[18];
unsigned char *p;
p = (unsigned char*)&in.s_addr;
snprintf(s, sizeof s, "%d.%d.%d.%d", p[0], p[1], p[2], p[3]);
return s;
}