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 41 static 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 */ 54 int 55 main(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