/* $NetBSD: commandline.c,v 1.7.2.1 2024/02/25 15:47:15 martin Exp $ */ /* * 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 #include #include #include #include #include #include /*% Index into parent argv vector. */ int isc_commandline_index = 1; /*% Character checked for validity. */ int isc_commandline_option; /*% Argument associated with option. */ char *isc_commandline_argument; /*% For printing error messages. */ char *isc_commandline_progname; /*% Print error messages. */ bool isc_commandline_errprint = true; /*% Reset processing. */ 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); }