Mercurial > illumos > onarm

comparison usr/src/cmd/lvm/metassist/controller/getopt_ext.c @ 0:c9caec207d52 b86

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Initial porting based on b86
author Koji Uno <koji.uno@sun.com>
date Tue, 02 Jun 2009 18:56:50 +0900
parents
children 1a15d5aaf794
comparison
equal deleted inserted replaced
-1:000000000000 0:c9caec207d52
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 2003 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 #pragma ident "@(#)getopt_ext.c 1.2 05/06/08 SMI"
28
29 #include <stdio.h>
30 #include <string.h>
31 #include "volume_error.h"
32 #include "getopt_ext.h"
33
34 /*
35 * Functions
36 */
37
38 /*
39 * Identical to getopt(3), except that
40 *
41 * 1. If "-" is the first character of optstring, each non-option argv
42 * element is handled as if it were the argument of an option with
43 * character code GETOPT_NON_OPTION_ARG. The result is that
44 * GETOPT_DONE_PARSING will not be returned until the end of the
45 * argument list has been reached.
46 *
47 * This mirrors the functionality provided by GNU getopt.
48 *
49 * 2. GETOPT_ERR_INVALID_OPT or GETOPT_ERR_MISSING_ARG is returned
50 * instead of '?'. Subsequently "-?" can be used as a valid
51 * option.
52 *
53 * 3. GETOPT_DONE_PARSING, GETOPT_ERR_INVALID_ARG, or
54 * GETOPT_NON_OPTION_ARG is returned instead of -1.
55 *
56 * @param argc
57 * The number of arguments in the array
58 *
59 * @param argv
60 * The argument array
61 *
62 * @param optstring
63 * The option letters, with ':' following options with
64 * required arguments. See note about "-" as the first
65 * character.
66 *
67 * @return GETOPT_ERR_INVALID_OPT
68 * if the option is not found in optstring
69 *
70 * GETOPT_ERR_MISSING_ARG
71 * if the option requires an argument which is missing
72 *
73 * GETOPT_ERR_INVALID_ARG
74 * if "-" is not the first character in optstring and a
75 * non-option argument is encountered
76 *
77 * GETOPT_NON_OPTION_ARG
78 * if "-" is the first character in optstring and a
79 * non-option argument is encountered
80 *
81 * GETOPT_DONE_PARSING
82 * if the end of the argument list is reached
83 *
84 * <optopt>
85 * the option character itself, if none of the above
86 * scenarios applies.
87 */
88 extern int
89 getopt_ext(
90 int argc,
91 char * const argv[],
92 const char *optstring)
93 {
94 int c;
95 int handle_non_options = (*optstring == '-');
96
97 /* Is "-" the first character of optstring? */
98 if (handle_non_options) {
99 /* getopt(3) doesn't understand "-" */
100 optstring++;
101 }
102
103 switch (c = getopt(argc, argv, optstring)) {
104
105 /*
106 * getopt(3) returns -1 when 1) it encounters a non-option
107 * argument or 2) reaches the end of the argument list.
108 * Distinguish from the two possibilities.
109 */
110 case -1:
111 if (optind < argc) {
112 optarg = argv[optind];
113
114 /* Non-option argument found */
115 if (handle_non_options) {
116 /* Non-option arguments are valid */
117 c = GETOPT_NON_OPTION_ARG;
118 optind++;
119 } else {
120 /* Non-option arguments are invalid */
121 c = GETOPT_ERR_INVALID_ARG;
122 }
123 } else {
124 /* End of the argument list reached */
125 c = GETOPT_DONE_PARSING;
126 }
127 break;
128
129 /*
130 * getopt(3) returns '?' when 1) the "-?" option is
131 * encountered, 2) an invalid option is given or 3) a
132 * valid option requiring an argument is found but no
133 * argument is specified. Distinguish from the three
134 * possibilities.
135 */
136 case '?':
137 /* Is this an error or was -? encountered? */
138 if (optopt != '?') {
139 if (strchr(optstring, optopt) == NULL) {
140 /* Invalid option */
141 c = GETOPT_ERR_INVALID_OPT;
142 optarg = argv[optind-1];
143 } else {
144 /* Valid option without required argument */
145 c = GETOPT_ERR_MISSING_ARG;
146 }
147 }
148 }
149
150 return (c);
151 }