1 /* $OpenBSD: echo.c,v 1.11 2023/03/08 04:43:04 guenther Exp $ */
2 /* $NetBSD: echo.c,v 1.6 1995/03/21 09:04:27 cgd Exp $ */
3
4 /*
5 * Copyright (c) 1989, 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33 #include <stdio.h>
34 #include <string.h>
35 #include <unistd.h>
36 #include <err.h>
37
38 int
main(int argc,char * argv[])39 main(int argc, char *argv[])
40 {
41 int nflag;
42
43 if (pledge("stdio", NULL) == -1)
44 err(1, "pledge");
45
46 /* This utility may NOT do getopt(3) option parsing. */
47 if (*++argv && !strcmp(*argv, "-n")) {
48 ++argv;
49 nflag = 1;
50 }
51 else
52 nflag = 0;
53
54 while (*argv) {
55 (void)fputs(*argv, stdout);
56 if (*++argv)
57 putchar(' ');
58 }
59 if (!nflag)
60 putchar('\n');
61
62 return 0;
63 }
64