1/*-
2 * Copyright (c) 1991, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Kenneth Almquist.
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. 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.
23 *
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
34 * SUCH DAMAGE.
35 *
36 * @(#)echo.c 8.2 (Berkeley) 5/4/95
37 * $FreeBSD: head/bin/sh/bltin/echo.c 62137 2000-06-26 22:43:30Z mph $
38 */
39
40/*
41 * Echo command.
42 */
43
44#define main echocmd
45
46#include "bltin.h"
47
48/* #define eflag 1 */
49
50int
51main(argc, argv)
52 int argc;
53 char **argv;
54{
55 char **ap;
56 char *p;
57 char c;
58 int count;
59 int nflag = 0;
60#ifndef eflag
61 int eflag = 0;
62#endif
63
64 ap = argv;
65 if (argc)
66 ap++;
67 if ((p = *ap) != NULL) {
68 if (equal(p, "-n")) {
69 nflag++;
70 ap++;
71 } else if (equal(p, "-e")) {
72#ifndef eflag
73 eflag++;
74#endif
75 ap++;
76 }
77 }
78 while ((p = *ap++) != NULL) {
79 while ((c = *p++) != '\0') {
80 if (c == '\\' && eflag) {
81 switch (*p++) {
82 case 'a': c = '\a'; break;
83 case 'b': c = '\b'; break;
84 case 'c': return 0; /* exit */
85 case 'e': c = '\e'; break;
86 case 'f': c = '\f'; break;
87 case 'n': c = '\n'; break;
88 case 'r': c = '\r'; break;
89 case 't': c = '\t'; break;
90 case 'v': c = '\v'; break;
91 case '\\': break; /* c = '\\' */
92 case '0':
93 c = 0;
94 count = 3;
95 while (--count >= 0 && (unsigned)(*p - '0') < 8)
96 c = (c << 3) + (*p++ - '0');
97 break;
98 default:
99 p--;
100 break;
101 }
102 }
103 putchar(c);
104 }
105 if (*ap)
106 putchar(' ');
107 }
108 if (! nflag)
109 putchar('\n');
110 return 0;
111}