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87cafc5e70
Mostly, several functions that take pointers as arguments, almost always char * pointers, had those pointers qualified with "const". Those that returned pointers to previously const-qualified arguments had their return values qualified as const. Some structure members were qualified as const to retain that attribute from the variables from which they were assigned. The macro DE_CONST was added to isc/util.h to deal with a handful of very special places where something is qualified as const but really needs to have its const qualifier removed. Also cleaned up a few places where variable names clashed with reserved identifiers. (Which mostly works fine, but strictly speaking is undefined by the standard.) Minor other ISC style cleanups.
209 lines
6.3 KiB
C
209 lines
6.3 KiB
C
/*
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* Copyright (C) 1999, 2000 Internet Software Consortium.
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*
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* Permission to use, copy, modify, and 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 INTERNET SOFTWARE CONSORTIUM DISCLAIMS
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* ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
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* CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
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* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
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* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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* 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 1.7 2000/06/01 17:20:20 tale Exp $ */
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/*
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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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* Principal Authors: Computer Systems Research Group at UC Berkeley
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* 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/string.h>
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#include <isc/util.h>
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int isc_commandline_index = 1; /* Index into parent argv vector. */
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int isc_commandline_option; /* Character checked for validity. */
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char *isc_commandline_argument; /* Argument associated with option. */
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char *isc_commandline_progname; /* For printing error messages. */
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isc_boolean_t isc_commandline_errprint = ISC_TRUE; /* Print error messages. */
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isc_boolean_t isc_commandline_reset = ISC_TRUE; /* Reset processing. */
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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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isc_commandline_reset = ISC_FALSE;
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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: illegal option -- %c\n",
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isc_commandline_progname,
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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,
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"%s: option requires an argument -- %c\n",
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isc_commandline_progname,
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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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