bin/echo/echo.c

   1 /* $NetBSD: echo.c,v 1.19 2016/09/05 01:00:07 sevan 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 1.19 2016/09/05 01:00:07 sevan Exp $");
  44 #endif
  45 #endif /* not lint */
  46
  47 #include <locale.h>
  48 #include <stdio.h>
  49 #include <stdlib.h>
  50 #include <string.h>
  51
  52 /* ARGSUSED */
  53 int
  54 main(int argc, char *argv[])
  55 {
  56         int nflag;
  57
  58         setprogname(argv[0]);
  59         (void)setlocale(LC_ALL, "");
  60
  61         /* This utility may NOT do getopt(3) option parsing. */
  62         if (*++argv && !strcmp(*argv, "-n")) {
  63                 ++argv;
  64                 nflag = 1;
  65         }
  66         else
  67                 nflag = 0;
  68
  69         while (*argv) {
  70                 (void)printf("%s", *argv);
  71                 if (*++argv)
  72                         (void)putchar(' ');
  73         }
  74         if (nflag == 0)
  75                 (void)putchar('\n');
  76         fflush(stdout);
  77         if (ferror(stdout))
  78                 exit(1);
  79         exit(0);
  80         /* NOTREACHED */
  81 }