freebsd-dev/contrib/smbfs/lib/smb/cfopt.c

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/*
* 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 1.3 2000/07/11 01:51:49 bp Exp $
*/
#include <sys/param.h>
#include <stdio.h>
#include <string.h>
#include <cflib.h>
extern char *__progname;
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 ""
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;
if (cf_optreset || !*place) { /* update scanning pointer */
cf_optreset = 0;
tmpind = cf_optind;
while (1) {
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,
"%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,
"%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 */
}