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


#ident  "%Z%%M% %I% %E% SMI"    /* from SVR4 bnu:getopt.c 2.3 */

#include "uucp.h"

/*  @(#)getopt.c    1.2 */
/*  3.0 SID #   1.2 */
/*LINTLIBRARY*/
#define ERR(s, c)   if(opterr){\
    (void) fputs(argv[0], stderr);\
    (void) fputs(s, stderr);\
    (void) fputc(c, stderr);\
    (void) fputc('\n', stderr);}

extern int strcmp();
extern char *strchr();

int opterr = 1;
int optind = 1;
int optopt;
char    *optarg;

int
getopt(argc, argv, opts)
int argc;
char    **argv, *opts;
{
    static int sp = 1;
    register int c;
    register char *cp;

    if(sp == 1)
        if(optind >= argc ||
           argv[optind][0] != '-' || argv[optind][1] == '\0')
            return(EOF);
        else if(strcmp(argv[optind], "--") == NULL) {
            optind++;
            return(EOF);
        }
    optopt = c = argv[optind][sp];
    if(c == ':' || (cp=strchr(opts, c)) == NULL) {
        ERR(": illegal option -- ", c);
        if(argv[optind][++sp] == '\0') {
            optind++;
            sp = 1;
        }
        return('?');
    }
    if(*++cp == ':') {
        if(argv[optind][sp+1] != '\0')
            optarg = &argv[optind++][sp+1];
        else if(++optind >= argc) {
            ERR(": option requires an argument -- ", c);
            sp = 1;
            return('?');
#ifndef NO_MINUS
        } else
            optarg = argv[optind++];
#else /* NO_MINUS */
        } else {
            optarg = argv[optind++];
            if (*optarg == '-') {
                ERR(": option requires an argument -- ", c);
                sp = 1;
                return('?');
            }
        }
#endif /* NO_MINUS */
        sp = 1;
    } else {
        if(argv[optind][++sp] == '\0') {
            sp = 1;
            optind++;
        }
        optarg = NULL;
    }
    return(c);
}