2 * Copyright (c) 1991, 1993
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * @(#)echo.c 8.2 (Berkeley) 5/4/95
37 * $FreeBSD: src/bin/sh/bltin/echo.c,v 1.9.2.3 2003/01/31 10:40:27 dwmalone Exp $
38 * $DragonFly: src/bin/sh/bltin/echo.c,v 1.2 2003/06/17 04:22:50 dillon Exp $
52 main(int argc
, char *argv
[])
66 if ((p
= *ap
) != NULL
) {
70 } else if (equal(p
, "-e")) {
77 while ((p
= *ap
++) != NULL
) {
78 while ((c
= *p
++) != '\0') {
79 if (c
== '\\' && eflag
) {
81 case 'a': c
= '\a'; break;
82 case 'b': c
= '\b'; break;
83 case 'c': return 0; /* exit */
84 case 'e': c
= '\033'; break;
85 case 'f': c
= '\f'; break;
86 case 'n': c
= '\n'; break;
87 case 'r': c
= '\r'; break;
88 case 't': c
= '\t'; break;
89 case 'v': c
= '\v'; break;
90 case '\\': break; /* c = '\\' */
94 while (--count
>= 0 && (unsigned)(*p
- '0') < 8)
95 c
= (c
<< 3) + (*p
++ - '0');