1/* See LICENSE file for copyright and license details. */
 2
 3
 4#include <stdio.h>
 5#include <string.h>
 6#include <unistd.h>
 7
 8#include "util.h"
 9
10static void
11usage(void)
12{
13	eprintf("usage: %s [name]\n", argv0);
14}
15
16// ?man hostname: show or set hostname
17// ?man arguments: name
18// ?man display or configure the system hostname
19int
20main(int argc, char *argv[])
21{
22	char host[HOST_NAME_MAX + 1];
23
24	ARGBEGIN {
25	default:
26		usage();
27	} ARGEND
28
29	if (!argc) {
30		if (gethostname(host, sizeof(host)) < 0)
31			eprintf("gethostname:");
32		puts(host);
33	} else if (argc == 1) {
34		if (sethostname(argv[0], strlen(argv[0])) < 0)
35			eprintf("sethostname:");
36	} else {
37		usage();
38	}
39
40	return fshut(stdout, "<stdout>");
41}