cmd/getopt/getopt.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (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 2005 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

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


#pragma ident   "%Z%%M% %I% %E% SMI"    /* SVr4.0 1.7   */

#include <stdio.h>
#include <locale.h>
#include <stdlib.h>
#include <string.h>

#define BLOCKLEN    5120

/* incr doesn't include a null termination */
#define ALLOC_BUFMEM(buf, size, incr) \
    { \
        size_t  len = strlen(buf); \
        if ((len + incr) >= size) { \
            size = len + incr + 1; \
            if ((buf = (char *)realloc((void *)buf, size)) \
                == NULL) { \
                (void) fputs( \
                gettext("getopt: Out of memory\n"), stderr); \
                exit(2); \
            } \
        } \
    }

int
main(int argc, char **argv)
{
    int c;
    int errflg = 0;
    char    tmpstr[4];
    char    *outstr;
    char    *goarg;
    size_t  bufsize;

    (void) setlocale(LC_ALL, "");
#if !defined(TEXT_DOMAIN)   /* Should be defined by cc -D */
#define TEXT_DOMAIN "SYS_TEST"  /* Use this only if it weren't */
#endif
    (void) textdomain(TEXT_DOMAIN);

    if (argc < 2) {
        (void) fputs(gettext("usage: getopt legal-args $*\n"), stderr);
        exit(2);
    }

    goarg = argv[1];
    argv[1] = argv[0];
    argv++;
    argc--;

    bufsize = BLOCKLEN;
    if ((outstr = (char *)malloc(bufsize)) == NULL) {
        (void) fputs(gettext("getopt: Out of memory\n"), stderr);
        exit(2);
    }
    outstr[0] = '\0';

    while ((c = getopt(argc, argv, goarg)) != EOF) {
        if (c == '?') {
            errflg++;
            continue;
        }

        tmpstr[0] = '-';
        tmpstr[1] = (char)c;
        tmpstr[2] = ' ';
        tmpstr[3] = '\0';

        /* If the buffer is full, expand it as appropriate */
        ALLOC_BUFMEM(outstr, bufsize, 3);

        (void) strcat(outstr, tmpstr);

        if (*(strchr(goarg, c)+1) == ':') {
            ALLOC_BUFMEM(outstr, bufsize, strlen(optarg)+1)
            (void) strcat(outstr, optarg);
            (void) strcat(outstr, " ");
        }
    }

    if (errflg) {
        exit(2);
    }

    ALLOC_BUFMEM(outstr, bufsize, 3)
    (void) strcat(outstr, "-- ");
    while (optind < argc) {
        ALLOC_BUFMEM(outstr, bufsize, strlen(argv[optind])+1)
        (void) strcat(outstr, argv[optind++]);
        (void) strcat(outstr, " ");
    }

    (void) printf("%s\n", outstr);
    return (0);
}