264 lines
6.7 KiB
C
264 lines
6.7 KiB
C
/*
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* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
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*
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* SPDX-License-Identifier: MPL-2.0 AND BSD-3-Clause
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, you can obtain one at https://mozilla.org/MPL/2.0/.
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*/
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/*
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* Copyright (C) 1987, 1993, 1994 The Regents of the University of California.
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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. 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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* See the COPYRIGHT file distributed with this work for additional
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* information regarding copyright ownership.
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*/
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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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#include <stdbool.h>
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#include <stdio.h>
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#include <isc/commandline.h>
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#include <isc/mem.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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int isc_commandline_index = 1;
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/*% Character checked for validity. */
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int isc_commandline_option;
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/*% Argument associated with option. */
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char *isc_commandline_argument;
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/*% For printing error messages. */
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char *isc_commandline_progname;
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/*% Print error messages. */
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bool isc_commandline_errprint = true;
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/*% Reset processing. */
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bool isc_commandline_reset = 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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const 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 = 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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}
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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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/*
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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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}
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if (isc_commandline_errprint && *options != ':') {
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fprintf(stderr, "%s: illegal option -- %c\n",
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isc_commandline_progname,
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isc_commandline_option);
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}
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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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}
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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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}
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if (isc_commandline_errprint) {
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fprintf(stderr,
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"%s: option requires an argument -- "
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"%c\n",
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isc_commandline_progname,
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isc_commandline_option);
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}
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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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isc_result_t
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isc_commandline_strtoargv(isc_mem_t *mctx, char *s, unsigned int *argcp,
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char ***argvp, unsigned int n) {
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isc_result_t result;
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restart:
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/* Discard leading whitespace. */
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while (*s == ' ' || *s == '\t') {
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s++;
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}
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if (*s == '\0') {
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/* We have reached the end of the string. */
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*argcp = n;
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*argvp = isc_mem_cget(mctx, n, sizeof(char *));
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} else {
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char *p = s;
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while (*p != ' ' && *p != '\t' && *p != '\0' && *p != '{') {
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if (*p == '\n') {
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*p = ' ';
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goto restart;
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}
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p++;
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}
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/* do "grouping", items between { and } are one arg */
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if (*p == '{') {
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char *t = p;
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/*
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* shift all characters to left by 1 to get rid of '{'
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*/
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while (*t != '\0') {
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t++;
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*(t - 1) = *t;
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}
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while (*p != '\0' && *p != '}') {
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p++;
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}
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/* get rid of '}' character */
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if (*p == '}') {
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*p = '\0';
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p++;
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}
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/* normal case, no "grouping" */
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} else if (*p != '\0') {
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*p++ = '\0';
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}
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result = isc_commandline_strtoargv(mctx, p, argcp, argvp,
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n + 1);
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if (result != ISC_R_SUCCESS) {
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return result;
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}
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(*argvp)[n] = s;
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}
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return ISC_R_SUCCESS;
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}
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