1 /* $OpenBSD: echo.c,v 1.10 2015/10/09 01:37:06 deraadt 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 /* ARGSUSED */ 39 int 40 main(int argc, char *argv[]) 41 { 42 int nflag; 43 44 if (pledge("stdio", NULL) == -1) 45 err(1, "pledge"); 46 47 /* This utility may NOT do getopt(3) option parsing. */ 48 if (*++argv && !strcmp(*argv, "-n")) { 49 ++argv; 50 nflag = 1; 51 } 52 else 53 nflag = 0; 54 55 while (*argv) { 56 (void)fputs(*argv, stdout); 57 if (*++argv) 58 putchar(' '); 59 } 60 if (!nflag) 61 putchar('\n'); 62 63 return 0; 64 } 65