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 38int 39main(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