libsmbfs/smb/cfopt.c

/*
 * Copyright (c) 2000, Boris Popov
 * All rights reserved.
 *
 * 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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    This product includes software developed by Boris Popov.
 * 4. Neither the name of the author nor the names of any co-contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
 *
 * $Id: cfopt.c,v 1.1.1.1 2001/06/09 00:28:12 zarzycki Exp $
 */

#include <sys/types.h>

#include <stdio.h>
#include <string.h>
#include <synch.h>
#include <libintl.h>

#include <cflib.h>
#include <netsmb/smb_lib.h>
#include <assert.h>

/* lock for the variables below */
mutex_t cf_opt_mutex = DEFAULTMUTEX;

int cf_opterr = 1,      /* if error message should be printed */
    cf_optind = 1,      /* index into parent argv vector */
    cf_optopt,          /* character checked for validity */
    cf_optreset;        /* reset getopt */
const char *cf_optarg;      /* argument associated with option */

#define BADCH   (int)'?'
#define BADARG  (int)':'
#define EMSG    ""

void
cf_opt_lock(void)
{
    mutex_lock(&cf_opt_mutex);
}

void
cf_opt_unlock(void)
{
    mutex_unlock(&cf_opt_mutex);
}

int
cf_getopt(nargc, nargv, ostr)
    int nargc;
    char * const *nargv;
    const char *ostr;
{
    static const char *place = EMSG;    /* option letter processing */
    char *oli;              /* option letter list index */
    int tmpind;

    assert(MUTEX_HELD(&cf_opt_mutex));

    if (cf_optreset || !*place) {       /* update scanning pointer */
        cf_optreset = 0;
        tmpind = cf_optind;
        for (;;) {
            if (tmpind >= nargc) {
                place = EMSG;
                return (-1);
            }
            if (*(place = nargv[tmpind]) != '-') {
                tmpind++;
                continue;   /* lookup next option */
            }
            if (place[1] && *++place == '-') {  /* found "--" */
                cf_optind = ++tmpind;
                place = EMSG;
                return (-1);
            }
            cf_optind = tmpind;
            break;
        }
    }                   /* option letter okay? */
    if ((cf_optopt = (int)*place++) == (int)':' ||
        !(oli = strchr(ostr, cf_optopt))) {
        /*
         * if the user didn't specify '-' as an option,
         * assume it means -1.
         */
        if (cf_optopt == (int)'-')
            return (-1);
        if (!*place)
            ++cf_optind;
        if (cf_opterr && *ostr != ':')
            (void) fprintf(stderr, dgettext(TEXT_DOMAIN,
                "%s: illegal option -- %c\n"),
                __progname, cf_optopt);
        return (BADCH);
    }
    if (*++oli != ':') {            /* don't need argument */
        cf_optarg = NULL;
        if (!*place)
            ++cf_optind;
    } else {                    /* need an argument */
        if (*place)         /* no white space */
            cf_optarg = place;
        else if (nargc <= ++cf_optind) {    /* no arg */
            place = EMSG;
            if (*ostr == ':')
                return (BADARG);
            if (cf_opterr)
                (void) fprintf(stderr, dgettext(TEXT_DOMAIN,
                    "%s: option requires an argument -- %c\n"),
                    __progname, cf_optopt);
            return (BADCH);
        } else              /* white space */
            cf_optarg = nargv[cf_optind];
        place = EMSG;
        ++cf_optind;
    }
    return (cf_optopt);         /* dump back option letter */
}