1/*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2005 Ryuichiro Imura
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#include <sys/types.h>
30#include <sys/iconv.h>
31#include <sys/sysctl.h>
32
33#include <ctype.h>
34#include <errno.h>
35#include <stdlib.h>
36#include <string.h>
37
38int
39kiconv_lookupconv(const char *drvname)
40{
41	size_t size;
42
43	if (sysctlbyname("kern.iconv.drvlist", NULL, &size, NULL, 0) == -1)
44		return (errno);
45	if (size > 0) {
46		char *drivers, *drvp;
47
48		drivers = malloc(size);
49		if (drivers == NULL)
50			return (ENOMEM);
51		if (sysctlbyname("kern.iconv.drvlist", drivers, &size, NULL, 0) == -1) {
52			free(drivers);
53			return (errno);
54		}
55		for (drvp = drivers; *drvp != '\0'; drvp += strlen(drvp) + 1)
56			if (strcmp(drvp, drvname) == 0) {
57				free(drivers);
58				return (0);
59			}
60		free(drivers);
61	}
62	return (ENOENT);
63}
64
65int
66kiconv_lookupcs(const char *tocode, const char *fromcode)
67{
68	size_t i, size;
69	struct iconv_cspair_info *csi, *csip;
70
71	if (sysctlbyname("kern.iconv.cslist", NULL, &size, NULL, 0) == -1)
72		return (errno);
73	if (size > 0) {
74		csi = malloc(size);
75		if (csi == NULL)
76			return (ENOMEM);
77		if (sysctlbyname("kern.iconv.cslist", csi, &size, NULL, 0) == -1) {
78			free(csi);
79			return (errno);
80		}
81		for (i = 0, csip = csi; i < (size/sizeof(*csi)); i++, csip++){
82			if (strcmp(csip->cs_to, tocode) == 0 &&
83			    strcmp(csip->cs_from, fromcode) == 0) {
84				free(csi);
85				return (0);
86			}
87		}
88		free(csi);
89	}
90	return (ENOENT);
91}
92