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 * Copyright 1997 Sun Microsystems, Inc.  All rights reserved.
23 * Use is subject to license terms.
24 */
25
26#pragma ident	"%Z%%M%	%I%	%E% SMI"
27
28#include <stdio.h>
29#include <string.h>
30#include <ctype.h>
31#include <sys/types.h>
32#include <nss_dbdefs.h>
33
34static int str2bootent(const char *, int, void *, char *, int);
35
36static DEFINE_NSS_DB_ROOT(db_root);
37
38static void
39_nss_initf_bootparams(nss_db_params_t *p)
40{
41	p->name = NSS_DBNAM_BOOTPARAMS;
42	p->default_config = NSS_DEFCONF_BOOTPARAMS;
43}
44
45int
46bootparams_getbyname(
47    char *name,	/* lookup key */
48    char *linebuf,	/* buffer to put the answer in */
49    int linelen	/* max # of bytes to put into linebuf */
50)
51{
52	nss_XbyY_args_t arg;
53	nss_status_t	res;
54
55	NSS_XbyY_INIT(&arg, linebuf, linebuf, linelen, str2bootent);
56	arg.key.name = name;
57	res = nss_search(&db_root, _nss_initf_bootparams,
58			NSS_DBOP_BOOTPARAMS_BYNAME, &arg);
59	(void) NSS_XbyY_FINI(&arg);
60	return (arg.status = res);
61}
62
63/*
64 * Return values: 0 = success, 1 = parse error, 2 = erange ...
65 * The structure pointer passed in is a buffer in the caller's space.
66 * instring and buffer should be separate areas.
67 * The calling routine does all the real parsing; we just check limits and
68 * store the entry in the buffer we were passed by the caller.
69 * NOTE: we expect the data we're passed (in instr) has had the host's name
70 * stripped off the begining.
71 */
72/* ARGSUSED */
73static int
74str2bootent(
75    const char *instr,
76    int lenstr,
77    void *ent,		/* really (char *) */
78    char *buffer,
79    int buflen
80)
81{
82	const char	*p, *limit;
83
84	if ((instr >= buffer && (buffer + buflen) > instr) ||
85	    (buffer >= instr && (instr + lenstr) > buffer)) {
86		return (NSS_STR_PARSE_PARSE);
87	}
88	p = instr;
89	limit = p + lenstr;
90
91	/* Skip over leading whitespace */
92	while (p < limit && isspace(*p)) {
93		p++;
94	}
95	if (p >= limit) {
96		/* Syntax error -- no data! */
97		return (NSS_STR_PARSE_PARSE);
98	}
99	lenstr -= (p - instr);
100	if (buflen <= lenstr) {		/* not enough buffer */
101		return (NSS_STR_PARSE_ERANGE);
102	}
103	(void) memcpy(buffer, p, lenstr);
104	buffer[lenstr] = '\0';
105
106	return (NSS_STR_PARSE_SUCCESS);
107}
108