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/*
* Portions Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
/*
* 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.
*/
/* $Id: commandline.c,v 1.12 2020/01/22 13:02:09 florian Exp $ */
/*! \file
* This file was adapted from the NetBSD project's source tree, RCS ID:
* NetBSD: getopt.c,v 1.15 1999/09/20 04:39:37 lukem Exp
*
* The primary change has been to rename items to the ISC namespace
* and format in the ISC coding style.
*/
/*
* \author Principal Authors: Computer Systems Research Group at UC Berkeley
* \author Principal ISC caretaker: DCL
*/
#include <stdio.h>
#include <isc/commandline.h>
#include <isc/msgs.h>
#include <string.h>
#include <isc/util.h>
/*% Index into parent argv vector. */
int isc_commandline_index = 1;
/*% Character checked for validity. */
int isc_commandline_option;
/*% Argument associated with option. */
char *isc_commandline_argument;
/*% For printing error messages. */
char *isc_commandline_progname;
/*% Print error messages. */
isc_boolean_t isc_commandline_errprint = ISC_TRUE;
/*% Reset processing. */
isc_boolean_t isc_commandline_reset = ISC_TRUE;
static char endopt = '\0';
#define BADOPT '?'
#define BADARG ':'
#define ENDOPT &endopt
/*!
* getopt --
* Parse argc/argv argument vector.
*/
int
isc_commandline_parse(int argc, char * const *argv, const char *options) {
static char *place = ENDOPT;
const char *option; /* Index into *options of option. */
REQUIRE(argc >= 0 && argv != NULL && options != NULL);
/*
* Update scanning pointer, either because a reset was requested or
* the previous argv was finished.
*/
if (isc_commandline_reset || *place == '\0') {
if (isc_commandline_reset) {
isc_commandline_index = 1;
isc_commandline_reset = ISC_FALSE;
}
if (isc_commandline_progname == NULL)
isc_commandline_progname = argv[0];
if (isc_commandline_index >= argc ||
*(place = argv[isc_commandline_index]) != '-') {
/*
* Index out of range or points to non-option.
*/
place = ENDOPT;
return (-1);
}
if (place[1] != '\0' && *++place == '-' && place[1] == '\0') {
/*
* Found '--' to signal end of options. Advance
* index to next argv, the first non-option.
*/
isc_commandline_index++;
place = ENDOPT;
return (-1);
}
}
isc_commandline_option = *place++;
option = strchr(options, isc_commandline_option);
/*
* Ensure valid option has been passed as specified by options string.
* '-:' is never a valid command line option because it could not
* distinguish ':' from the argument specifier in the options string.
*/
if (isc_commandline_option == ':' || option == NULL) {
if (*place == '\0')
isc_commandline_index++;
if (isc_commandline_errprint && *options != ':')
fprintf(stderr, "%s: %s -- %c\n",
isc_commandline_progname, "illegal option",
isc_commandline_option);
return (BADOPT);
}
if (*++option != ':') {
/*
* Option does not take an argument.
*/
isc_commandline_argument = NULL;
/*
* Skip to next argv if at the end of the current argv.
*/
if (*place == '\0')
++isc_commandline_index;
} else {
/*
* Option needs an argument.
*/
if (*place != '\0')
/*
* Option is in this argv, -D1 style.
*/
isc_commandline_argument = place;
else if (argc > ++isc_commandline_index)
/*
* Option is next argv, -D 1 style.
*/
isc_commandline_argument = argv[isc_commandline_index];
else {
/*
* Argument needed, but no more argv.
*/
place = ENDOPT;
/*
* Silent failure with "missing argument" return
* when ':' starts options string, per historical spec.
*/
if (*options == ':')
return (BADARG);
if (isc_commandline_errprint)
fprintf(stderr, "%s: %s -- %c\n",
isc_commandline_progname,
"option requires an argument",
isc_commandline_option);
return (BADOPT);
}
place = ENDOPT;
/*
* Point to argv that follows argument.
*/
isc_commandline_index++;
}
return (isc_commandline_option);
}
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