cmd/sh/echo.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright (c) 1988, 2010, Oracle and/or its affiliates. All rights reserved.
 */

/*  Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/*    All Rights Reserved   */


/*
 *  UNIX shell
 */
#include    "defs.h"

#define exit(a) flushb(); return (a)

extern int exitval;

int
echo(int argc, unsigned char **argv)
{
    unsigned char   *cp;
    int i, wd;
    int nflg = 0;
    int j;
    int len;
    wchar_t wc;

    if (ucb_builtins) {

        nflg = 0;
        if (argc > 1 && argv[1][0] == '-' &&
            argv[1][1] == 'n' && !argv[1][2]) {
            nflg++;
            argc--;
            argv++;
        }

        for (i = 1; i < argc; i++) {
            sigchk();

            for (cp = argv[i]; *cp; cp++) {
                prc_buff(*cp);
            }

            if (i < argc-1)
                prc_buff(' ');
        }

        if (nflg == 0)
            prc_buff('\n');
        exit(0);
    } else {
        if (--argc == 0) {
            prc_buff('\n');
            exit(0);
        }

        for (i = 1; i <= argc; i++) {
            sigchk();
            for (cp = argv[i]; *cp; cp++) {
                if ((len = mbtowc(&wc, (char *)cp,
                    MB_LEN_MAX)) <= 0) {
                    prc_buff(*cp);
                    continue;
                }

                if (wc == '\\') {
                    switch (*++cp) {
                    case 'b':
                        prc_buff('\b');
                        continue;
                    case 'c':
                        exit(0);

                    case 'f':
                        prc_buff('\f');
                        continue;

                    case 'n':
                        prc_buff('\n');
                        continue;

                    case 'r':
                        prc_buff('\r');
                        continue;

                    case 't':
                        prc_buff('\t');
                        continue;

                    case 'v':
                        prc_buff('\v');
                        continue;

                    case '\\':
                        prc_buff('\\');
                        continue;
                    case '0':
                        j = wd = 0;
                        while ((*++cp >= '0' &&
                            *cp <= '7') && j++ < 3) {
                            wd <<= 3;
                            wd |= (*cp - '0');
                        }
                        prc_buff(wd);
                        --cp;
                        continue;

                    default:
                        cp--;
                    }
                    prc_buff(*cp);
                    continue;
                } else {
                    for (; len > 0; len--)
                        prc_buff(*cp++);
                    cp--;
                    continue;
                }
            }
            prc_buff(i == argc? '\n': ' ');
        }
        exit(0);
    }
}