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 * 4. Neither the name of the University nor the names of its contributors
17 *    may be used to endorse or promote products derived from this software
18 *    without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 *	@(#)echo.c	8.2 (Berkeley) 5/4/95
33 */
34
35#include <sys/cdefs.h>
36__FBSDID("$FreeBSD$");
37
38/*
39 * Echo command.
40 */
41
42#define main echocmd
43
44#include "bltin.h"
45
46/* #define eflag 1 */
47
48int
49main(int argc, char *argv[])
50{
51	char **ap;
52	char *p;
53	char c;
54	int count;
55	int nflag = 0;
56#ifndef eflag
57	int eflag = 0;
58#endif
59
60	ap = argv;
61	if (argc)
62		ap++;
63	if ((p = *ap) != NULL) {
64		if (equal(p, "-n")) {
65			nflag++;
66			ap++;
67		} else if (equal(p, "-e")) {
68#ifndef eflag
69			eflag++;
70#endif
71			ap++;
72		}
73	}
74	while ((p = *ap++) != NULL) {
75		while ((c = *p++) != '\0') {
76			if (c == '\\' && eflag) {
77				switch (*p++) {
78				case 'a':  c = '\a';  break;
79				case 'b':  c = '\b';  break;
80				case 'c':  return 0;		/* exit */
81				case 'e':  c = '\033';  break;
82				case 'f':  c = '\f';  break;
83				case 'n':  c = '\n';  break;
84				case 'r':  c = '\r';  break;
85				case 't':  c = '\t';  break;
86				case 'v':  c = '\v';  break;
87				case '\\':  break;		/* c = '\\' */
88				case '0':
89					c = 0;
90					count = 3;
91					while (--count >= 0 && (unsigned)(*p - '0') < 8)
92						c = (c << 3) + (*p++ - '0');
93					break;
94				default:
95					p--;
96					break;
97				}
98			}
99			putchar(c);
100		}
101		if (*ap)
102			putchar(' ');
103	}
104	if (! nflag)
105		putchar('\n');
106	return 0;
107}
108