1/*
2 * Copyright 2013 Garrett D'Amore <garrett@damore.org>
3 * Copyright 2010 Nexenta Systems, Inc.  All rights reserved.
4 * Copyright (c) 2000, 2001 Alexey Zelkin <phantom@FreeBSD.org>
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 "lint.h"
30#include "file64.h"
31#include <sys/types.h>
32#include <sys/stat.h>
33#include <errno.h>
34#include <fcntl.h>
35#include <limits.h>
36#include <stdlib.h>
37#include <string.h>
38#include <unistd.h>
39#include <stdio.h>
40
41#include "libc.h"
42#include "ldpart.h"
43#include "setlocale.h"
44
45static int split_lines(char *, const char *);
46
47int
48__part_load_locale(const char *name,
49    char **locale_buf, const char *category_filename,
50    int locale_buf_size_max, int locale_buf_size_min,
51    const char **dst_localebuf)
52{
53	int		saverr, fd, i, num_lines;
54	char		*lbuf, *p;
55	const char	*plim;
56	char		filename[PATH_MAX];
57	struct stat	st;
58	size_t		namesize, bufsize;
59
60	/*
61	 * Slurp the locale file into the cache.
62	 */
63	namesize = strlen(name) + 1;
64
65	/* 'PathLocale' must be already set & checked. */
66
67	(void) snprintf(filename, sizeof (filename), "%s/%s/%s/LCL_DATA",
68	    _PathLocale, name, category_filename);
69
70	if ((fd = open(filename, O_RDONLY)) < 0)
71		return (_LDP_ERROR);
72	if (fstat(fd, &st) != 0)
73		goto bad_locale;
74	if (st.st_size <= 0) {
75		errno = EINVAL;
76		goto bad_locale;
77	}
78	bufsize = namesize + st.st_size;
79	if ((lbuf = libc_malloc(bufsize)) == NULL) {
80		errno = ENOMEM;
81		goto bad_locale;
82	}
83	(void) strcpy(lbuf, name);
84	p = lbuf + namesize;
85	plim = p + st.st_size;
86	if (read(fd, p, (size_t)st.st_size) != st.st_size)
87		goto bad_lbuf;
88	/*
89	 * Parse the locale file into localebuf.
90	 */
91	if (plim[-1] != '\n') {
92		errno = EINVAL;
93		goto bad_lbuf;
94	}
95	num_lines = split_lines(p, plim);
96	if (num_lines >= locale_buf_size_max)
97		num_lines = locale_buf_size_max;
98	else if (num_lines >= locale_buf_size_min)
99		num_lines = locale_buf_size_min;
100	else {
101		errno = EINVAL;
102		goto bad_lbuf;
103	}
104	(void) close(fd);
105	/*
106	 * Record the successful parse in the cache.
107	 */
108	*locale_buf = lbuf;
109	for (p = *locale_buf, i = 0; i < num_lines; i++)
110		dst_localebuf[i] = (p += strlen(p) + 1);
111	for (i = num_lines; i < locale_buf_size_max; i++)
112		dst_localebuf[i] = NULL;
113
114	return (_LDP_LOADED);
115
116bad_lbuf:
117	saverr = errno;
118	free(lbuf);
119	errno = saverr;
120bad_locale:
121	saverr = errno;
122	(void) close(fd);
123	errno = saverr;
124
125	return (_LDP_ERROR);
126}
127
128static int
129split_lines(char *p, const char *plim)
130{
131	int i;
132
133	i = 0;
134	while (p < plim) {
135		if (*p == '\n') {
136			*p = '\0';
137			i++;
138		}
139		p++;
140	}
141	return (i);
142}
143