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Diffstat (limited to 'lib/isc/commandline.c')
| -rw-r--r-- | lib/isc/commandline.c | 265 |
1 files changed, 265 insertions, 0 deletions
diff --git a/lib/isc/commandline.c b/lib/isc/commandline.c new file mode 100644 index 0000000..dfe7023 --- /dev/null +++ b/lib/isc/commandline.c @@ -0,0 +1,265 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 AND BSD-3-Clause + + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + */ + +/* + * Copyright (C) 1987, 1993, 1994 The Regents of the University of California. + * + * 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. 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. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +/*! \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. + */ + +#include <stdbool.h> +#include <stdio.h> + +#include <isc/commandline.h> +#include <isc/mem.h> +#include <isc/print.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 bool isc_commandline_errprint = true; +/*% Reset processing. */ +LIBISC_EXTERNAL_DATA bool isc_commandline_reset = 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; + const 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 = 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: illegal option -- %c\n", + isc_commandline_progname, + 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: option requires an argument -- " + "%c\n", + isc_commandline_progname, + isc_commandline_option); + } + + return (BADOPT); + } + + place = ENDOPT; + + /* + * Point to argv that follows argument. + */ + isc_commandline_index++; + } + + return (isc_commandline_option); +} + +isc_result_t +isc_commandline_strtoargv(isc_mem_t *mctx, char *s, unsigned int *argcp, + char ***argvp, unsigned int n) { + isc_result_t result; + +restart: + /* Discard leading whitespace. */ + while (*s == ' ' || *s == '\t') { + s++; + } + + if (*s == '\0') { + /* We have reached the end of the string. */ + *argcp = n; + *argvp = isc_mem_get(mctx, n * sizeof(char *)); + } else { + char *p = s; + while (*p != ' ' && *p != '\t' && *p != '\0' && *p != '{') { + if (*p == '\n') { + *p = ' '; + goto restart; + } + p++; + } + + /* do "grouping", items between { and } are one arg */ + if (*p == '{') { + char *t = p; + /* + * shift all characters to left by 1 to get rid of '{' + */ + while (*t != '\0') { + t++; + *(t - 1) = *t; + } + while (*p != '\0' && *p != '}') { + p++; + } + /* get rid of '}' character */ + if (*p == '}') { + *p = '\0'; + p++; + } + /* normal case, no "grouping" */ + } else if (*p != '\0') { + *p++ = '\0'; + } + + result = isc_commandline_strtoargv(mctx, p, argcp, argvp, + n + 1); + if (result != ISC_R_SUCCESS) { + return (result); + } + (*argvp)[n] = s; + } + + return (ISC_R_SUCCESS); +} |