[apple/shell_cmds.git] / sh / bltin / echo.c

/*-
 * Copyright (c) 1991, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Kenneth Almquist.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)echo.c	8.2 (Berkeley) 5/4/95
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

/*
 * Echo command.
 */

#define main echocmd

#include "bltin.h"

/* #define eflag 1 */

int
main(int argc, char *argv[])
{
	char **ap;
	char *p;
	char c;
	int count;
	int nflag = 0;
#ifndef eflag
	int eflag = 0;
#endif

	ap = argv;
	if (argc)
		ap++;
	if ((p = *ap) != NULL) {
		if (equal(p, "-n")) {
			nflag++;
			ap++;
		} else if (equal(p, "-e")) {
#ifndef eflag
			eflag++;
#endif
			ap++;
		}
	}
	while ((p = *ap++) != NULL) {
		while ((c = *p++) != '\0') {
			if (c == '\\' && eflag) {
				switch (*p++) {
				case 'a':  c = '\a';  break;
				case 'b':  c = '\b';  break;
				case 'c':  return 0;		/* exit */
				case 'e':  c = '\033';  break;
				case 'f':  c = '\f';  break;
				case 'n':  c = '\n';  break;
				case 'r':  c = '\r';  break;
				case 't':  c = '\t';  break;
				case 'v':  c = '\v';  break;
				case '\\':  break;		/* c = '\\' */
				case '0':
					c = 0;
					count = 3;
					while (--count >= 0 && (unsigned)(*p - '0') < 8)
						c = (c << 3) + (*p++ - '0');
					break;
				default:
					p--;
					break;
				}
			}
			putchar(c);
		}
		if (*ap)
			putchar(' ');
	}
	if (! nflag)
		putchar('\n');
	return 0;
}
Commit	Line	Data
71aad674 A	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
	48	int
	49	main(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	}