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

/*-
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * 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.
 * 3. 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: head/bin/sh/bltin/echo.c 326025 2017-11-20 19:49:47Z pfg $");

/*
 * 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	1	/*-
254f12f7 A	2	* SPDX-License-Identifier: BSD-3-Clause
254f12f7 A	3	*
71aad674 A	4	* Copyright (c) 1991, 1993
	5	* The Regents of the University of California. All rights reserved.
	6	*
	7	* This code is derived from software contributed to Berkeley by
	8	* Kenneth Almquist.
	9	*
	10	* Redistribution and use in source and binary forms, with or without
	11	* modification, are permitted provided that the following conditions
	12	* are met:
	13	* 1. Redistributions of source code must retain the above copyright
	14	* notice, this list of conditions and the following disclaimer.
	15	* 2. Redistributions in binary form must reproduce the above copyright
	16	* notice, this list of conditions and the following disclaimer in the
	17	* documentation and/or other materials provided with the distribution.
254f12f7	18	* 3. Neither the name of the University nor the names of its contributors
71aad674 A	19	* may be used to endorse or promote products derived from this software
	20	* without specific prior written permission.
	21	*
	22	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	23	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	24	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	25	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	26	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	27	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	28	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	29	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	30	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	31	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	32	* SUCH DAMAGE.
	33	*
	34	* @(#)echo.c 8.2 (Berkeley) 5/4/95
	35	*/
	36
	37	#include <sys/cdefs.h>
254f12f7	38	__FBSDID("$FreeBSD: head/bin/sh/bltin/echo.c 326025 2017-11-20 19:49:47Z pfg $");
71aad674 A	39
	40	/*
	41	* Echo command.
	42	*/
	43
	44	#define main echocmd
	45
	46	#include "bltin.h"
	47
	48	/* #define eflag 1 */
	49
	50	int
	51	main(int argc, char *argv[])
	52	{
	53	char **ap;
	54	char *p;
	55	char c;
	56	int count;
	57	int nflag = 0;
	58	#ifndef eflag
	59	int eflag = 0;
	60	#endif
	61
	62	ap = argv;
	63	if (argc)
	64	ap++;
	65	if ((p = *ap) != NULL) {
	66	if (equal(p, "-n")) {
	67	nflag++;
	68	ap++;
	69	} else if (equal(p, "-e")) {
	70	#ifndef eflag
	71	eflag++;
	72	#endif
	73	ap++;
	74	}
	75	}
	76	while ((p = *ap++) != NULL) {
	77	while ((c = *p++) != '\0') {
	78	if (c == '\\' && eflag) {
	79	switch (*p++) {
	80	case 'a': c = '\a'; break;
	81	case 'b': c = '\b'; break;
	82	case 'c': return 0; /* exit */
	83	case 'e': c = '\033'; break;
	84	case 'f': c = '\f'; break;
	85	case 'n': c = '\n'; break;
	86	case 'r': c = '\r'; break;
	87	case 't': c = '\t'; break;
	88	case 'v': c = '\v'; break;
	89	case '\\': break; /* c = '\\' */
	90	case '0':
	91	c = 0;
	92	count = 3;
	93	while (--count >= 0 && (unsigned)(*p - '0') < 8)
	94	c = (c << 3) + (*p++ - '0');
	95	break;
	96	default:
	97	p--;
	98	break;
	99	}
	100	}
	101	putchar(c);
	102	}
103	if (*ap)
104	putchar(' ');
105	}
106	if (! nflag)
107	putchar('\n');
108	return 0;
109	}