1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 1992-1996,2003 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1988 AT&T */ 28 /* All Rights Reserved */ 29 30 31 #pragma ident "%Z%%M% %I% %E% SMI" 32 33 /* 34 * This file contains getoptstr(), which is getopt() for strings of arguments 35 * (not arrays of strings). It is used by the bootloader ({*fs,inet}boot) and 36 * the kernel to process argument strings. 37 */ 38 39 40 #include "getoptstr.h" 41 42 43 /* 44 * This routine needs to be supplied by whatever uses this file. 45 */ 46 char *strchr(const char *s, int c); 47 48 49 #define NULL ((void *)0) 50 51 #define ISNTWORDCH(c) ((c) == '\0' || ISSPACE(c)) 52 53 54 /* 55 * Prepare a gos_params structure for use by getoptstr(). 56 */ 57 void 58 getoptstr_init(struct gos_params *params) 59 { 60 params->gos_pos = 1; 61 } 62 63 /* 64 * Modeled after lib/libc/port/gen/getopt.c. 65 * 66 * With params->gos_opts set to a string of options and params->gos_strp set to 67 * an argument string, getoptstr returns 68 * * the next option letter, where the options are given by the 69 * params->gos_opts string. If the option is followed by a ':' in gos_opts, 70 * then params->gos_optargp will point to the beginning of the argument in 71 * the string, and params->gos_optarglen will contain its length. 72 * * -1 if "--" or a non-option argument is encountered. In the former 73 * case, params->gos_strp is advanced to the next argument. 74 * * '?' if an illegal option is encountered or if an argument is not 75 * supplied for an option which requires one and ':' is not the first 76 * character of opts. In both cases, the option letter is available in 77 * params->gos_last_opt, and in the former case, params->gos_errp will 78 * point to the offending character. 79 * * ':' if an argument is not supplied for an option which requires one and 80 * ':' is the first character of params->gos_opts. 81 */ 82 int 83 getoptstr(struct gos_params *params) 84 { 85 char c; 86 char *cp; 87 88 /* 89 * const because we should update params. Just make sure you don't 90 * use this after you update params->gos_strp. 91 */ 92 const char * const strp = params->gos_strp; 93 94 95 if (params->gos_opts == NULL || strp == NULL) 96 return (-1); 97 98 if (params->gos_pos == 1) { 99 /* At beginning of new word. */ 100 101 if (strp[0] == '\0' || strp[0] != '-') 102 return (-1); 103 if (ISNTWORDCH(strp[1])) { 104 /* Lone dash. */ 105 return (-1); 106 } 107 108 /* Check for "--" */ 109 if (strp[1] == '-' && ISNTWORDCH(strp[2])) { 110 params->gos_strp = &strp[2]; 111 SKIP_SPC(params->gos_strp); 112 return (-1); 113 } 114 } 115 116 params->gos_last_opt = c = strp[params->gos_pos]; 117 if (c == ':' || (cp = strchr(params->gos_opts, c)) == NULL) { 118 /* Unrecognized option error. */ 119 params->gos_errp = &strp[params->gos_pos]; 120 ++params->gos_pos; 121 if (ISNTWORDCH(strp[params->gos_pos])) { 122 params->gos_strp = &strp[params->gos_pos]; 123 SKIP_SPC(params->gos_strp); 124 params->gos_pos = 1; 125 } 126 return ('?'); 127 } 128 129 if (cp[1] == ':') { 130 /* This option expects an argument. */ 131 132 params->gos_strp = &strp[params->gos_pos + 1]; 133 134 if (ISNTWORDCH(*params->gos_strp)) { 135 /* The argument is in the next word. */ 136 SKIP_SPC(params->gos_strp); 137 138 if (*params->gos_strp == '\0') { 139 /* Not. Missing argument. */ 140 params->gos_pos = 1; 141 params->gos_optargp = NULL; 142 return (params->gos_opts[0] == ':' ? ':' : '?'); 143 } 144 } 145 146 params->gos_optargp = params->gos_strp; 147 148 /* Advance to the next word. */ 149 SKIP_WORD(params->gos_strp); 150 params->gos_optarglen = params->gos_strp - params->gos_optargp; 151 SKIP_SPC(params->gos_strp); 152 153 params->gos_pos = 1; 154 } else { 155 ++params->gos_pos; 156 if (ISNTWORDCH(strp[params->gos_pos])) { 157 params->gos_strp = &strp[params->gos_pos]; 158 SKIP_SPC(params->gos_strp); 159 params->gos_pos = 1; 160 } 161 params->gos_optargp = NULL; 162 } 163 return (c); 164 } 165