2 * Portions Copyright (C) 2004, 2005, 2007, 2008, 2014 Internet Systems Consortium, Inc. ("ISC")
3 * Portions Copyright (C) 1999-2001 Internet Software Consortium.
5 * Permission to use, copy, modify, and/or distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
9 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
10 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
11 * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
12 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
13 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
14 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
15 * PERFORMANCE OF THIS SOFTWARE.
19 * Copyright (c) 1987, 1993, 1994
20 * The Regents of the University of California. All rights reserved.
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
25 * 1. Redistributions of source code must retain the above copyright
26 * notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 * notice, this list of conditions and the following disclaimer in the
29 * documentation and/or other materials provided with the distribution.
30 * 3. Neither the name of the University nor the names of its contributors
31 * may be used to endorse or promote products derived from this software
32 * without specific prior written permission.
34 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
35 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
36 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
37 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
38 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
39 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
40 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
41 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
42 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
43 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
47 /* $Id: commandline.c,v 1.22 2008/09/25 04:02:39 tbox Exp $ */
50 * This file was adapted from the NetBSD project's source tree, RCS ID:
51 * NetBSD: getopt.c,v 1.15 1999/09/20 04:39:37 lukem Exp
53 * The primary change has been to rename items to the ISC namespace
54 * and format in the ISC coding style.
58 * \author Principal Authors: Computer Systems Research Group at UC Berkeley
59 * \author Principal ISC caretaker: DCL
66 #include <isc/commandline.h>
68 #include <isc/string.h>
71 /*% Index into parent argv vector. */
72 LIBISC_EXTERNAL_DATA int isc_commandline_index = 1;
73 /*% Character checked for validity. */
74 LIBISC_EXTERNAL_DATA int isc_commandline_option;
75 /*% Argument associated with option. */
76 LIBISC_EXTERNAL_DATA char *isc_commandline_argument;
77 /*% For printing error messages. */
78 LIBISC_EXTERNAL_DATA char *isc_commandline_progname;
79 /*% Print error messages. */
80 LIBISC_EXTERNAL_DATA isc_boolean_t isc_commandline_errprint = ISC_TRUE;
81 /*% Reset processing. */
82 LIBISC_EXTERNAL_DATA isc_boolean_t isc_commandline_reset = ISC_TRUE;
84 static char endopt = '\0';
88 #define ENDOPT &endopt
92 * Parse argc/argv argument vector.
95 isc_commandline_parse(int argc, char * const *argv, const char *options) {
96 static char *place = ENDOPT;
97 char *option; /* Index into *options of option. */
99 REQUIRE(argc >= 0 && argv != NULL && options != NULL);
102 * Update scanning pointer, either because a reset was requested or
103 * the previous argv was finished.
105 if (isc_commandline_reset || *place == '\0') {
106 if (isc_commandline_reset) {
107 isc_commandline_index = 1;
108 isc_commandline_reset = ISC_FALSE;
111 if (isc_commandline_progname == NULL)
112 isc_commandline_progname = argv[0];
114 if (isc_commandline_index >= argc ||
115 *(place = argv[isc_commandline_index]) != '-') {
117 * Index out of range or points to non-option.
123 if (place[1] != '\0' && *++place == '-' && place[1] == '\0') {
125 * Found '--' to signal end of options. Advance
126 * index to next argv, the first non-option.
128 isc_commandline_index++;
134 isc_commandline_option = *place++;
135 option = strchr(options, isc_commandline_option);
138 * Ensure valid option has been passed as specified by options string.
139 * '-:' is never a valid command line option because it could not
140 * distinguish ':' from the argument specifier in the options string.
142 if (isc_commandline_option == ':' || option == NULL) {
144 isc_commandline_index++;
146 if (isc_commandline_errprint && *options != ':')
147 fprintf(stderr, "%s: %s -- %c\n",
148 isc_commandline_progname,
149 isc_msgcat_get(isc_msgcat,
150 ISC_MSGSET_COMMANDLINE,
153 isc_commandline_option);
158 if (*++option != ':') {
160 * Option does not take an argument.
162 isc_commandline_argument = NULL;
165 * Skip to next argv if at the end of the current argv.
168 ++isc_commandline_index;
172 * Option needs an argument.
176 * Option is in this argv, -D1 style.
178 isc_commandline_argument = place;
180 else if (argc > ++isc_commandline_index)
182 * Option is next argv, -D 1 style.
184 isc_commandline_argument = argv[isc_commandline_index];
188 * Argument needed, but no more argv.
193 * Silent failure with "missing argument" return
194 * when ':' starts options string, per historical spec.
199 if (isc_commandline_errprint)
200 fprintf(stderr, "%s: %s -- %c\n",
201 isc_commandline_progname,
202 isc_msgcat_get(isc_msgcat,
203 ISC_MSGSET_COMMANDLINE,
207 isc_commandline_option);
215 * Point to argv that follows argument.
217 isc_commandline_index++;
220 return (isc_commandline_option);