226 lines
6.8 KiB
C
226 lines
6.8 KiB
C
/*
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* Portions Copyright (C) 2004, 2005, 2007, 2008 Internet Systems Consortium, Inc. ("ISC")
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* Portions Copyright (C) 1999-2001 Internet Software Consortium.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
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* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
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* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
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* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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/*
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* Copyright (c) 1987, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/* $Id: commandline.c,v 1.22 2008/09/25 04:02:39 tbox Exp $ */
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/*! \file
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* This file was adapted from the NetBSD project's source tree, RCS ID:
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* NetBSD: getopt.c,v 1.15 1999/09/20 04:39:37 lukem Exp
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*
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* The primary change has been to rename items to the ISC namespace
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* and format in the ISC coding style.
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*/
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/*
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* \author Principal Authors: Computer Systems Research Group at UC Berkeley
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* \author Principal ISC caretaker: DCL
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*/
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#include <config.h>
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#include <stdio.h>
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#include <isc/commandline.h>
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#include <isc/msgs.h>
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#include <isc/string.h>
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#include <isc/util.h>
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/*% Index into parent argv vector. */
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LIBISC_EXTERNAL_DATA int isc_commandline_index = 1;
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/*% Character checked for validity. */
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LIBISC_EXTERNAL_DATA int isc_commandline_option;
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/*% Argument associated with option. */
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LIBISC_EXTERNAL_DATA char *isc_commandline_argument;
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/*% For printing error messages. */
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LIBISC_EXTERNAL_DATA char *isc_commandline_progname;
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/*% Print error messages. */
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LIBISC_EXTERNAL_DATA isc_boolean_t isc_commandline_errprint = ISC_TRUE;
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/*% Reset processing. */
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LIBISC_EXTERNAL_DATA isc_boolean_t isc_commandline_reset = ISC_TRUE;
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static char endopt = '\0';
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#define BADOPT '?'
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#define BADARG ':'
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#define ENDOPT &endopt
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/*!
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* getopt --
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* Parse argc/argv argument vector.
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*/
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int
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isc_commandline_parse(int argc, char * const *argv, const char *options) {
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static char *place = ENDOPT;
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char *option; /* Index into *options of option. */
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REQUIRE(argc >= 0 && argv != NULL && options != NULL);
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/*
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* Update scanning pointer, either because a reset was requested or
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* the previous argv was finished.
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*/
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if (isc_commandline_reset || *place == '\0') {
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if (isc_commandline_reset) {
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isc_commandline_index = 1;
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isc_commandline_reset = ISC_FALSE;
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}
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if (isc_commandline_progname == NULL)
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isc_commandline_progname = argv[0];
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if (isc_commandline_index >= argc ||
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*(place = argv[isc_commandline_index]) != '-') {
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/*
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* Index out of range or points to non-option.
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*/
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place = ENDOPT;
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return (-1);
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}
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if (place[1] != '\0' && *++place == '-' && place[1] == '\0') {
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/*
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* Found '--' to signal end of options. Advance
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* index to next argv, the first non-option.
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*/
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isc_commandline_index++;
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place = ENDOPT;
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return (-1);
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}
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}
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isc_commandline_option = *place++;
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option = strchr(options, isc_commandline_option);
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/*
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* Ensure valid option has been passed as specified by options string.
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* '-:' is never a valid command line option because it could not
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* distinguish ':' from the argument specifier in the options string.
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*/
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if (isc_commandline_option == ':' || option == NULL) {
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if (*place == '\0')
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isc_commandline_index++;
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if (isc_commandline_errprint && *options != ':')
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fprintf(stderr, "%s: %s -- %c\n",
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isc_commandline_progname,
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isc_msgcat_get(isc_msgcat,
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ISC_MSGSET_COMMANDLINE,
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ISC_MSG_ILLEGALOPT,
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"illegal option"),
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isc_commandline_option);
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return (BADOPT);
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}
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if (*++option != ':') {
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/*
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* Option does not take an argument.
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*/
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isc_commandline_argument = NULL;
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/*
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* Skip to next argv if at the end of the current argv.
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*/
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if (*place == '\0')
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++isc_commandline_index;
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} else {
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/*
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* Option needs an argument.
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*/
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if (*place != '\0')
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/*
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* Option is in this argv, -D1 style.
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*/
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isc_commandline_argument = place;
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else if (argc > ++isc_commandline_index)
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/*
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* Option is next argv, -D 1 style.
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*/
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isc_commandline_argument = argv[isc_commandline_index];
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else {
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/*
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* Argument needed, but no more argv.
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*/
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place = ENDOPT;
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/*
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* Silent failure with "missing argument" return
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* when ':' starts options string, per historical spec.
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*/
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if (*options == ':')
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return (BADARG);
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if (isc_commandline_errprint)
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fprintf(stderr, "%s: %s -- %c\n",
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isc_commandline_progname,
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isc_msgcat_get(isc_msgcat,
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ISC_MSGSET_COMMANDLINE,
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ISC_MSG_OPTNEEDARG,
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"option requires "
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"an argument"),
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isc_commandline_option);
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return (BADOPT);
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}
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place = ENDOPT;
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/*
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* Point to argv that follows argument.
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*/
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isc_commandline_index++;
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}
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return (isc_commandline_option);
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}
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