139 lines
4.0 KiB
C
139 lines
4.0 KiB
C
/* $NetBSD: getopt.c,v 1.26 2003/08/07 16:43:40 agc Exp $ */
|
|
/* SPDX-License-Identifier: BSD-3-Clause */
|
|
/*
|
|
* Copyright (c) 1987, 1993, 1994
|
|
* The Regents of the University of California. 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. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
|
|
*/
|
|
|
|
#include <string.h>
|
|
#include "getopt.h"
|
|
|
|
#include <logging/log.h>
|
|
LOG_MODULE_REGISTER(getopt);
|
|
|
|
#define BADCH ((int)'?')
|
|
#define BADARG ((int)':')
|
|
#define EMSG ""
|
|
|
|
void getopt_init(struct getopt_state *state)
|
|
{
|
|
state->opterr = 1;
|
|
state->optind = 1;
|
|
state->optopt = 0;
|
|
state->optreset = 0;
|
|
state->optarg = NULL;
|
|
|
|
state->place = ""; /* EMSG */
|
|
}
|
|
|
|
/*
|
|
* getopt --
|
|
* Parse argc/argv argument vector.
|
|
*/
|
|
int
|
|
getopt(state, nargc, nargv, ostr)
|
|
struct getopt_state *state;
|
|
int nargc;
|
|
char *const nargv[];
|
|
const char *ostr;
|
|
{
|
|
char *oli; /* option letter list index */
|
|
|
|
if (state->optreset || *state->place == 0) { /* update scanning pointer */
|
|
state->optreset = 0;
|
|
state->place = nargv[state->optind];
|
|
if (state->optind >= nargc || *state->place++ != '-') {
|
|
/* Argument is absent or is not an option */
|
|
state->place = EMSG;
|
|
return -1;
|
|
}
|
|
state->optopt = *state->place++;
|
|
if (state->optopt == '-' && *state->place == 0) {
|
|
/* "--" => end of options */
|
|
++state->optind;
|
|
state->place = EMSG;
|
|
return -1;
|
|
}
|
|
if (state->optopt == 0) {
|
|
/* Solitary '-', treat as a '-' option
|
|
* if the program (eg su) is looking for it.
|
|
*/
|
|
state->place = EMSG;
|
|
if (strchr(ostr, '-') == NULL) {
|
|
return -1;
|
|
}
|
|
state->optopt = '-';
|
|
}
|
|
} else {
|
|
state->optopt = *state->place++;
|
|
}
|
|
|
|
/* See if option letter is one the caller wanted... */
|
|
oli = strchr(ostr, state->optopt);
|
|
if (state->optopt == ':' || oli == NULL) {
|
|
if (*state->place == 0) {
|
|
++state->optind;
|
|
}
|
|
if (state->opterr && *ostr != ':') {
|
|
LOG_ERR("illegal option -- %c", state->optopt);
|
|
}
|
|
return BADCH;
|
|
}
|
|
|
|
/* Does this option need an argument? */
|
|
if (oli[1] != ':') {
|
|
/* don't need argument */
|
|
state->optarg = NULL;
|
|
if (*state->place == 0) {
|
|
++state->optind;
|
|
}
|
|
} else {
|
|
/* Option-argument is either the rest of this argument or the
|
|
* entire next argument.
|
|
*/
|
|
if (*state->place) {
|
|
state->optarg = state->place;
|
|
} else if (nargc > ++state->optind) {
|
|
state->optarg = nargv[state->optind];
|
|
} else {
|
|
/* option-argument absent */
|
|
state->place = EMSG;
|
|
if (*ostr == ':') {
|
|
return BADARG;
|
|
}
|
|
if (state->opterr) {
|
|
LOG_ERR("option requires an argument -- %c",
|
|
state->optopt);
|
|
}
|
|
return BADCH;
|
|
}
|
|
state->place = EMSG;
|
|
++state->optind;
|
|
}
|
|
return state->optopt; /* return option letter */
|
|
}
|