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/* $OpenBSD: catopen.c,v 1.16 2015/01/16 16:48:51 deraadt Exp $ */
/*-
* Copyright (c) 1996 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by J.T. Conklin.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#define _NLS_PRIVATE
#include <limits.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <unistd.h>
#include <fcntl.h>
#include <nl_types.h>
#define NLS_DEFAULT_PATH "/usr/share/nls/%L/%N.cat:/usr/share/nls/%l.%c/%N.cat:/usr/share/nls/%l/%N.cat"
#define NLS_DEFAULT_LANG "C"
static nl_catd load_msgcat(const char *);
/* ARGSUSED */
nl_catd
_catopen(const char *name, int oflag)
{
char tmppath[PATH_MAX];
char *nlspath;
char *lang;
char *s, *t, *sep, *dot;
const char *u;
nl_catd catd;
if (name == NULL || *name == '\0')
return (nl_catd) -1;
/* absolute or relative path? */
if (strchr(name, '/'))
return load_msgcat(name);
if (issetugid() != 0 || (nlspath = getenv("NLSPATH")) == NULL)
nlspath = NLS_DEFAULT_PATH;
lang = NULL;
if (oflag & NL_CAT_LOCALE) {
lang = getenv("LC_ALL");
if (lang == NULL)
lang = getenv("LC_MESSAGES");
}
if (lang == NULL)
lang = getenv("LANG");
if (lang == NULL)
lang = NLS_DEFAULT_LANG;
if (strcmp(lang, "POSIX") == 0)
lang = NLS_DEFAULT_LANG;
s = nlspath;
t = tmppath;
/*
* Locale names are of the form language[_territory][.codeset].
* See POSIX-1-2008 "8.2 Internationalization Variables"
*/
sep = strchr(lang, '_');
dot = strrchr(lang, '.');
if (dot && sep && dot < sep)
dot = NULL; /* ignore dots preceeding _ */
if (dot == NULL)
lang = NLS_DEFAULT_LANG; /* no codeset specified */
do {
while (*s && *s != ':') {
if (*s == '%') {
switch (*(++s)) {
case 'L': /* LANG or LC_MESSAGES */
u = lang;
while (*u && t < tmppath + PATH_MAX-1)
*t++ = *u++;
break;
case 'N': /* value of name parameter */
u = name;
while (*u && t < tmppath + PATH_MAX-1)
*t++ = *u++;
break;
case 'l': /* language part */
u = lang;
while (*u && t < tmppath + PATH_MAX-1) {
*t++ = *u++;
if (sep && u >= sep)
break;
if (dot && u >= dot)
break;
}
break;
case 't': /* territory part */
if (sep == NULL)
break;
u = sep + 1;
while (*u && t < tmppath + PATH_MAX-1) {
*t++ = *u++;
if (dot && u >= dot)
break;
}
break;
case 'c': /* codeset part */
if (dot == NULL)
break;
u = dot + 1;
while (*u && t < tmppath + PATH_MAX-1)
*t++ = *u++;
break;
default:
if (t < tmppath + PATH_MAX-1)
*t++ = *s;
}
} else {
if (t < tmppath + PATH_MAX-1)
*t++ = *s;
}
s++;
}
*t = '\0';
catd = load_msgcat(tmppath);
if (catd != (nl_catd) -1)
return catd;
if (*s)
s++;
t = tmppath;
} while (*s);
return (nl_catd) -1;
}
static nl_catd
load_msgcat(const char *path)
{
struct stat st;
nl_catd catd;
void *data;
int fd;
if ((fd = open(path, O_RDONLY|O_CLOEXEC)) == -1)
return (nl_catd) -1;
if (fstat(fd, &st) != 0) {
close (fd);
return (nl_catd) -1;
}
data = mmap(0, (size_t) st.st_size, PROT_READ, MAP_SHARED, fd, (off_t)0);
close (fd);
if (data == MAP_FAILED) {
return (nl_catd) -1;
}
if (ntohl(((struct _nls_cat_hdr *) data)->__magic) != _NLS_MAGIC) {
munmap(data, (size_t) st.st_size);
return (nl_catd) -1;
}
if ((catd = malloc(sizeof (*catd))) == 0) {
munmap(data, (size_t) st.st_size);
return (nl_catd) -1;
}
catd->__data = data;
catd->__size = st.st_size;
return catd;
}
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