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