echo.c revision 1.20 
1/* $NetBSD: echo.c,v 1.20 2021/05/19 22:12:36 kre 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#ifndef lint
34__COPYRIGHT(
35"@(#) Copyright (c) 1989, 1993\
36 The Regents of the University of California.  All rights reserved.");
37#endif /* not lint */
38
39#ifndef lint
40#if 0
41static char sccsid[] = "@(#)echo.c	8.1 (Berkeley) 5/31/93";
42#else
43__RCSID("$NetBSD: echo.c,v 1.20 2021/05/19 22:12:36 kre Exp $");
44#endif
45#endif /* not lint */
46
47#include <err.h>
48#include <locale.h>
49#include <stdio.h>
50#include <stdlib.h>
51#include <string.h>
52
53/* ARGSUSED */
54int
55main(int argc, char *argv[])
56{
57	int nflag;
58
59	setprogname(argv[0]);
60	(void)setlocale(LC_ALL, "");
61
62	/* This utility may NOT do getopt(3) option parsing. */
63	if (*++argv && !strcmp(*argv, "-n")) {
64		++argv;
65		nflag = 1;
66	}
67	else
68		nflag = 0;
69
70	while (*argv) {
71		(void)printf("%s", *argv);
72		if (*++argv)
73			(void)putchar(' ');
74	}
75	if (nflag == 0)
76		(void)putchar('\n');
77	fflush(stdout);
78	if (ferror(stdout))
79		err(1, "write error");
80	exit(0);
81	/* NOTREACHED */
82}
83