From 7c478bd95313f5f23a4c958a745db2134aa03244 Mon Sep 17 00:00:00 2001 From: "stevel@tonic-gate" Date: Tue, 14 Jun 2005 00:00:00 -0700 Subject: OpenSolaris Launch --- usr/src/common/util/getoptstr.c | 164 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 164 insertions(+) create mode 100644 usr/src/common/util/getoptstr.c (limited to 'usr/src/common/util/getoptstr.c') diff --git a/usr/src/common/util/getoptstr.c b/usr/src/common/util/getoptstr.c new file mode 100644 index 0000000000..75a16c8860 --- /dev/null +++ b/usr/src/common/util/getoptstr.c @@ -0,0 +1,164 @@ +/* + * CDDL HEADER START + * + * The contents of this file are subject to the terms of the + * Common Development and Distribution License, Version 1.0 only + * (the "License"). You may not use this file except in compliance + * with the License. + * + * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE + * or http://www.opensolaris.org/os/licensing. + * See the License for the specific language governing permissions + * and limitations under the License. + * + * When distributing Covered Code, include this CDDL HEADER in each + * file and include the License file at usr/src/OPENSOLARIS.LICENSE. + * If applicable, add the following below this CDDL HEADER, with the + * fields enclosed by brackets "[]" replaced with your own identifying + * information: Portions Copyright [yyyy] [name of copyright owner] + * + * CDDL HEADER END + */ +/* + * Copyright 1992-1996,2003 Sun Microsystems, Inc. All rights reserved. + * Use is subject to license terms. + */ + +/* Copyright (c) 1988 AT&T */ +/* All Rights Reserved */ + + +#pragma ident "%Z%%M% %I% %E% SMI" + +/* + * This file contains getoptstr(), which is getopt() for strings of arguments + * (not arrays of strings). It is used by the bootloader ({*fs,inet}boot) and + * the kernel to process argument strings. + */ + + +#include "getoptstr.h" + + +/* + * This routine needs to be supplied by whatever uses this file. + */ +char *strchr(const char *s, int c); + + +#define NULL ((void *)0) + +#define ISNTWORDCH(c) ((c) == '\0' || ISSPACE(c)) + + +/* + * Prepare a gos_params structure for use by getoptstr(). + */ +void +getoptstr_init(struct gos_params *params) +{ + params->gos_pos = 1; +} + +/* + * Modeled after lib/libc/port/gen/getopt.c. + * + * With params->gos_opts set to a string of options and params->gos_strp set to + * an argument string, getoptstr returns + * * the next option letter, where the options are given by the + * params->gos_opts string. If the option is followed by a ':' in gos_opts, + * then params->gos_optargp will point to the beginning of the argument in + * the string, and params->gos_optarglen will contain its length. + * * -1 if "--" or a non-option argument is encountered. In the former + * case, params->gos_strp is advanced to the next argument. + * * '?' if an illegal option is encountered or if an argument is not + * supplied for an option which requires one and ':' is not the first + * character of opts. In both cases, the option letter is available in + * params->gos_last_opt, and in the former case, params->gos_errp will + * point to the offending character. + * * ':' if an argument is not supplied for an option which requires one and + * ':' is the first character of params->gos_opts. + */ +int +getoptstr(struct gos_params *params) +{ + char c; + char *cp; + + /* + * const because we should update params. Just make sure you don't + * use this after you update params->gos_strp. + */ + const char * const strp = params->gos_strp; + + + if (params->gos_opts == NULL || strp == NULL) + return (-1); + + if (params->gos_pos == 1) { + /* At beginning of new word. */ + + if (strp[0] == '\0' || strp[0] != '-') + return (-1); + if (ISNTWORDCH(strp[1])) { + /* Lone dash. */ + return (-1); + } + + /* Check for "--" */ + if (strp[1] == '-' && ISNTWORDCH(strp[2])) { + params->gos_strp = &strp[2]; + SKIP_SPC(params->gos_strp); + return (-1); + } + } + + params->gos_last_opt = c = strp[params->gos_pos]; + if (c == ':' || (cp = strchr(params->gos_opts, c)) == NULL) { + /* Unrecognized option error. */ + params->gos_errp = &strp[params->gos_pos]; + ++params->gos_pos; + if (ISNTWORDCH(strp[params->gos_pos])) { + params->gos_strp = &strp[params->gos_pos]; + SKIP_SPC(params->gos_strp); + params->gos_pos = 1; + } + return ('?'); + } + + if (cp[1] == ':') { + /* This option expects an argument. */ + + params->gos_strp = &strp[params->gos_pos + 1]; + + if (ISNTWORDCH(*params->gos_strp)) { + /* The argument is in the next word. */ + SKIP_SPC(params->gos_strp); + + if (*params->gos_strp == '\0') { + /* Not. Missing argument. */ + params->gos_pos = 1; + params->gos_optargp = NULL; + return (params->gos_opts[0] == ':' ? ':' : '?'); + } + } + + params->gos_optargp = params->gos_strp; + + /* Advance to the next word. */ + SKIP_WORD(params->gos_strp); + params->gos_optarglen = params->gos_strp - params->gos_optargp; + SKIP_SPC(params->gos_strp); + + params->gos_pos = 1; + } else { + ++params->gos_pos; + if (ISNTWORDCH(strp[params->gos_pos])) { + params->gos_strp = &strp[params->gos_pos]; + SKIP_SPC(params->gos_strp); + params->gos_pos = 1; + } + params->gos_optargp = NULL; + } + return (c); +} -- cgit v1.2.3