1/* $NetBSD: echo.c,v 1.23 2021/11/16 21:38:29 rillig Exp $	*/
2
3/*
4 * Copyright (c) 1989, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33__COPYRIGHT(
34"@(#) Copyright (c) 1989, 1993\
35 The Regents of the University of California.  All rights reserved.");
36
37#if 0
38static char sccsid[] = "@(#)echo.c	8.1 (Berkeley) 5/31/93";
39#else
40__RCSID("$NetBSD: echo.c,v 1.23 2021/11/16 21:38:29 rillig Exp $");
41#endif
42
43#include <err.h>
44#include <locale.h>
45#include <stdbool.h>
46#include <stdio.h>
47#include <stdlib.h>
48#include <string.h>
49
50/* ARGSUSED */
51int
52main(int argc, char *argv[])
53{
54	bool nflag;
55
56	setprogname(argv[0]);
57	(void)setlocale(LC_ALL, "");
58
59	/* This utility may NOT do getopt(3) option parsing. */
60	nflag = *++argv != NULL && strcmp(*argv, "-n") == 0;
61	if (nflag)
62		++argv;
63
64	while (*argv != NULL) {
65		(void)printf("%s", *argv);
66		if (*++argv != NULL)
67			(void)putchar(' ');
68	}
69	if (!nflag)
70		(void)putchar('\n');
71	(void)fflush(stdout);
72	if (ferror(stdout) != 0)
73		err(1, "write error");
74	return 0;
75}
76