echo/echo.c

   1 /*      $NetBSD: echo.c,v 1.8 1997/11/05 21:19:56 cgd 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. All advertising materials mentioning features or use of this software
  16  *    must display the following acknowledgement:
  17  *      This product includes software developed by the University of
  18  *      California, Berkeley and its contributors.
  19  * 4. Neither the name of the University nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 #include <sys/cdefs.h>
  37 #ifndef lint
  38 __COPYRIGHT(
  39 "@(#) Copyright (c) 1989, 1993\n\
  40         The Regents of the University of California.  All rights reserved.\n");
  41 #endif /* not lint */
  42
  43 #ifndef lint
  44 #if 0
  45 static char sccsid[] = "@(#)echo.c      8.1 (Berkeley) 5/31/93";
  46 #else
  47 __RCSID("$NetBSD: echo.c,v 1.8 1997/11/05 21:19:56 cgd Exp $");
  48 #endif
  49 #endif /* not lint */
  50
  51 #include <stdio.h>
  52 #include <stdlib.h>
  53 #include <string.h>
  54
  55 int     main __P((int, char *[]));
  56
  57 /* ARGSUSED */
  58 int
  59 main(argc, argv)
  60         int argc;
  61         char *argv[];
  62 {
  63         int nflag;
  64
  65         /* This utility may NOT do getopt(3) option parsing. */
  66         if (*++argv && !strcmp(*argv, "-n")) {
  67                 ++argv;
  68                 nflag = 1;
  69         }
  70         else
  71                 nflag = 0;
  72
  73         while (*argv) {
  74                 (void)printf("%s", *argv);
  75                 if (*++argv)
  76                         (void)putchar(' ');
  77         }
  78         if (!nflag)
  79                 (void)putchar('\n');
  80         exit(0);
  81         /* NOTREACHED */
  82 }