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glibc/catgets/catgets.c
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/* Copyright (C) 1996-2016 Free Software Foundation, Inc. | |
This file is part of the GNU C Library. | |
Contributed by Ulrich Drepper, <drepper@gnu.org>. | |
The GNU C Library is free software; you can redistribute it and/or | |
modify it under the terms of the GNU Lesser General Public | |
License as published by the Free Software Foundation; either | |
version 2.1 of the License, or (at your option) any later version. | |
The GNU C Library is distributed in the hope that it will be useful, | |
but WITHOUT ANY WARRANTY; without even the implied warranty of | |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
Lesser General Public License for more details. | |
You should have received a copy of the GNU Lesser General Public | |
License along with the GNU C Library; if not, see | |
<http://www.gnu.org/licenses/>. */ | |
#include <errno.h> | |
#include <locale.h> | |
#include <nl_types.h> | |
#include <stdlib.h> | |
#include <string.h> | |
#include <unistd.h> | |
#include <sys/mman.h> | |
#include "catgetsinfo.h" | |
/* Open the catalog and return a descriptor for the catalog. */ | |
nl_catd | |
catopen (const char *cat_name, int flag) | |
{ | |
__nl_catd result; | |
const char *env_var = NULL; | |
const char *nlspath = NULL; | |
char *tmp = NULL; | |
if (strchr (cat_name, '/') == NULL) | |
{ | |
if (flag == NL_CAT_LOCALE) | |
/* Use the current locale setting for LC_MESSAGES. */ | |
env_var = setlocale (LC_MESSAGES, NULL); | |
else | |
/* Use the LANG environment variable. */ | |
env_var = getenv ("LANG"); | |
if (env_var == NULL || *env_var == '\0' | |
|| (__libc_enable_secure && strchr (env_var, '/') != NULL)) | |
env_var = "C"; | |
nlspath = getenv ("NLSPATH"); | |
if (nlspath != NULL && *nlspath != '\0') | |
{ | |
/* Append the system dependent directory. */ | |
size_t len = strlen (nlspath) + 1 + sizeof NLSPATH; | |
tmp = malloc (len); | |
if (__glibc_unlikely (tmp == NULL)) | |
return (nl_catd) -1; | |
__stpcpy (__stpcpy (__stpcpy (tmp, nlspath), ":"), NLSPATH); | |
nlspath = tmp; | |
} | |
else | |
nlspath = NLSPATH; | |
} | |
result = (__nl_catd) malloc (sizeof (*result)); | |
if (result == NULL) | |
{ | |
/* We cannot get enough memory. */ | |
result = (nl_catd) -1; | |
} | |
else if (__open_catalog (cat_name, nlspath, env_var, result) != 0) | |
{ | |
/* Couldn't open the file. */ | |
free ((void *) result); | |
result = (nl_catd) -1; | |
} | |
free (tmp); | |
return (nl_catd) result; | |
} | |
/* Return message from message catalog. */ | |
char * | |
catgets (nl_catd catalog_desc, int set, int message, const char *string) | |
{ | |
__nl_catd catalog; | |
size_t idx; | |
size_t cnt; | |
/* Be generous if catalog which failed to be open is used. */ | |
if (catalog_desc == (nl_catd) -1 || ++set <= 0 || message < 0) | |
return (char *) string; | |
catalog = (__nl_catd) catalog_desc; | |
idx = ((set * message) % catalog->plane_size) * 3; | |
cnt = 0; | |
do | |
{ | |
if (catalog->name_ptr[idx + 0] == (u_int32_t) set | |
&& catalog->name_ptr[idx + 1] == (u_int32_t) message) | |
return (char *) &catalog->strings[catalog->name_ptr[idx + 2]]; | |
idx += catalog->plane_size * 3; | |
} | |
while (++cnt < catalog->plane_depth); | |
__set_errno (ENOMSG); | |
return (char *) string; | |
} | |
/* Return resources used for loaded message catalog. */ | |
int | |
catclose (nl_catd catalog_desc) | |
{ | |
__nl_catd catalog; | |
/* Be generous if catalog which failed to be open is used. */ | |
if (catalog_desc == (nl_catd) -1) | |
{ | |
__set_errno (EBADF); | |
return -1; | |
} | |
catalog = (__nl_catd) catalog_desc; | |
#ifdef _POSIX_MAPPED_FILES | |
if (catalog->status == mmapped) | |
__munmap ((void *) catalog->file_ptr, catalog->file_size); | |
else | |
#endif /* _POSIX_MAPPED_FILES */ | |
if (catalog->status == malloced) | |
free ((void *) catalog->file_ptr); | |
else | |
{ | |
__set_errno (EBADF); | |
return -1; | |
} | |
free ((void *) catalog); | |
return 0; | |
} |