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Diffstat (limited to 'lib/isc/commandline.c')
| -rw-r--r-- | lib/isc/commandline.c | 225 |
1 files changed, 225 insertions, 0 deletions
diff --git a/lib/isc/commandline.c b/lib/isc/commandline.c new file mode 100644 index 0000000..aca1203 --- /dev/null +++ b/lib/isc/commandline.c @@ -0,0 +1,225 @@ +/* + * Portions Copyright (C) 2004, 2005, 2007, 2008 Internet Systems Consortium, Inc. ("ISC") + * Portions Copyright (C) 1999-2001 Internet Software Consortium. + * + * 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. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. 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 1.22 2008/09/25 04:02:39 tbox 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 <config.h> + +#include <stdio.h> + +#include <isc/commandline.h> +#include <isc/msgs.h> +#include <isc/string.h> +#include <isc/util.h> + +/*% Index into parent argv vector. */ +LIBISC_EXTERNAL_DATA int isc_commandline_index = 1; +/*% Character checked for validity. */ +LIBISC_EXTERNAL_DATA int isc_commandline_option; +/*% Argument associated with option. */ +LIBISC_EXTERNAL_DATA char *isc_commandline_argument; +/*% For printing error messages. */ +LIBISC_EXTERNAL_DATA char *isc_commandline_progname; +/*% Print error messages. */ +LIBISC_EXTERNAL_DATA isc_boolean_t isc_commandline_errprint = ISC_TRUE; +/*% Reset processing. */ +LIBISC_EXTERNAL_DATA 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; + 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, + isc_msgcat_get(isc_msgcat, + ISC_MSGSET_COMMANDLINE, + ISC_MSG_ILLEGALOPT, + "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, + isc_msgcat_get(isc_msgcat, + ISC_MSGSET_COMMANDLINE, + ISC_MSG_OPTNEEDARG, + "option requires " + "an argument"), + isc_commandline_option); + + return (BADOPT); + } + + place = ENDOPT; + + /* + * Point to argv that follows argument. + */ + isc_commandline_index++; + } + + return (isc_commandline_option); +} |