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/* Copyright (c) 2000, 2011, Oracle and/or its affiliates.
Copyright (C) 2011 Monty Program Ab
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
/**
@file
@brief
Read language depeneded messagefile
*/
#include <my_global.h>
#include "sql_priv.h"
#include "unireg.h"
#include "derror.h"
#include "mysys_err.h"
#include "mysqld.h" // lc_messages_dir
#include "derror.h" // read_texts
#include "sql_class.h" // THD
static bool check_error_mesg(const char *file_name, const char **errmsg);
static void init_myfunc_errs(void);
C_MODE_START
static const char **get_server_errmsgs(void)
{
if (!current_thd)
return DEFAULT_ERRMSGS;
return CURRENT_THD_ERRMSGS;
}
C_MODE_END
/**
Read messages from errorfile.
This function can be called multiple times to reload the messages.
If it fails to load the messages:
- If we already have error messages loaded, keep the old ones and
return FALSE(ok)
- Initializing the errmesg pointer to an array of empty strings
and return TRUE (error)
@retval
FALSE OK
@retval
TRUE Error
*/
bool init_errmessage(void)
{
const char **errmsgs, **ptr, **org_errmsgs;
bool error= FALSE;
DBUG_ENTER("init_errmessage");
/*
Get a pointer to the old error messages pointer array.
read_texts() tries to free it.
*/
org_errmsgs= my_error_unregister(ER_ERROR_FIRST, ER_ERROR_LAST);
/* Read messages from file. */
if (read_texts(ERRMSG_FILE, my_default_lc_messages->errmsgs->language,
&errmsgs, ER_ERROR_LAST - ER_ERROR_FIRST + 1) &&
!errmsgs)
{
my_free(errmsgs);
if (org_errmsgs)
{
/* Use old error messages */
errmsgs= org_errmsgs;
}
else
{
/*
No error messages. Create a temporary empty error message so
that we don't get a crash if some code wrongly tries to access
a non existing error message.
*/
if (!(errmsgs= (const char**) my_malloc((ER_ERROR_LAST-ER_ERROR_FIRST+1)*
sizeof(char*), MYF(0))))
DBUG_RETURN(TRUE);
for (ptr= errmsgs; ptr < errmsgs + ER_ERROR_LAST - ER_ERROR_FIRST; ptr++)
*ptr= "";
error= TRUE;
}
}
else
my_free(org_errmsgs); // Free old language
/* Register messages for use with my_error(). */
if (my_error_register(get_server_errmsgs, ER_ERROR_FIRST, ER_ERROR_LAST))
{
my_free(errmsgs);
DBUG_RETURN(TRUE);
}
DEFAULT_ERRMSGS= errmsgs; /* Init global variable */
init_myfunc_errs(); /* Init myfunc messages */
DBUG_RETURN(error);
}
/**
Check the error messages array contains all relevant error messages
*/
static bool check_error_mesg(const char *file_name, const char **errmsg)
{
/*
The last MySQL error message can't be an empty string; If it is,
it means that the error file doesn't contain all MySQL messages
and is probably from an older version of MySQL / MariaDB.
*/
if (errmsg[ER_LAST_MYSQL_ERROR_MESSAGE -1 - ER_ERROR_FIRST][0] == 0)
{
sql_print_error("Error message file '%s' is probably from and older "
"version of MariaDB / MYSQL as it doesn't contain all "
"error messages", file_name);
return 1;
}
return 0;
}
/**
Read text from packed textfile in language-directory.
If we can't read messagefile then it's panic- we can't continue.
*/
bool read_texts(const char *file_name, const char *language,
const char ***point, uint error_messages)
{
register uint i;
uint count,funktpos;
size_t offset, length;
File file;
char name[FN_REFLEN];
char lang_path[FN_REFLEN];
uchar *buff;
uchar head[32],*pos;
DBUG_ENTER("read_texts");
*point= 0;
LINT_INIT(buff);
funktpos=0;
convert_dirname(lang_path, language, NullS);
(void) my_load_path(lang_path, lang_path, lc_messages_dir);
if ((file= mysql_file_open(key_file_ERRMSG,
fn_format(name, file_name, lang_path, "", 4),
O_RDONLY | O_SHARE | O_BINARY,
MYF(0))) < 0)
{
/*
Trying pre-5.4 sematics of the --language parameter.
It included the language-specific part, e.g.:
--language=/path/to/english/
*/
if ((file= mysql_file_open(key_file_ERRMSG,
fn_format(name, file_name, lc_messages_dir, "", 4),
O_RDONLY | O_SHARE | O_BINARY,
MYF(0))) < 0)
goto err;
sql_print_warning("An old style --language or -lc-message-dir value with language specific part detected: %s", lc_messages_dir);
sql_print_warning("Use --lc-messages-dir without language specific part instead.");
}
funktpos=1;
if (mysql_file_read(file, (uchar*) head, 32, MYF(MY_NABP)))
goto err;
funktpos=2;
if (head[0] != (uchar) 254 || head[1] != (uchar) 254 ||
head[2] != 2 || head[3] != 3)
goto err; /* purecov: inspected */
error_message_charset_info= system_charset_info;
length=uint4korr(head+6); count=uint2korr(head+10);
if (count < error_messages)
{
sql_print_error("\
Error message file '%s' had only %d error messages, but it should contain at least %d error messages.\nCheck that the above file is the right version for this program!",
name,count,error_messages);
(void) mysql_file_close(file, MYF(MY_WME));
DBUG_RETURN(1);
}
if (!(*point= (const char**)
my_malloc((size_t) (MY_MAX(length,count*2)+count*sizeof(char*)),MYF(0))))
{
funktpos=3; /* purecov: inspected */
goto err; /* purecov: inspected */
}
buff= (uchar*) (*point + count);
if (mysql_file_read(file, buff, (size_t) count*2, MYF(MY_NABP)))
goto err;
for (i=0, offset=0, pos= buff ; i< count ; i++)
{
(*point)[i]= (char*) buff+offset;
offset+= uint2korr(pos);
pos+=2;
}
if (mysql_file_read(file, buff, length, MYF(MY_NABP)))
goto err;
(void) mysql_file_close(file, MYF(0));
i= check_error_mesg(file_name, *point);
DBUG_RETURN(i);
err:
sql_print_error((funktpos == 3) ? "Not enough memory for messagefile '%s'" :
(funktpos == 2) ? "Incompatible header in messagefile '%s'. Probably from another version of MariaDB" :
((funktpos == 1) ? "Can't read from messagefile '%s'" :
"Can't find messagefile '%s'"), name);
if (file != FERR)
(void) mysql_file_close(file, MYF(MY_WME));
DBUG_RETURN(1);
} /* read_texts */
/**
Initiates error-messages used by my_func-library.
*/
static void init_myfunc_errs()
{
init_glob_errs(); /* Initiate english errors */
if (!(specialflag & SPECIAL_ENGLISH))
{
EE(EE_FILENOTFOUND) = ER(ER_FILE_NOT_FOUND);
EE(EE_CANTCREATEFILE) = ER(ER_CANT_CREATE_FILE);
EE(EE_READ) = ER(ER_ERROR_ON_READ);
EE(EE_WRITE) = ER(ER_ERROR_ON_WRITE);
EE(EE_BADCLOSE) = ER(ER_ERROR_ON_CLOSE);
EE(EE_OUTOFMEMORY) = ER(ER_OUTOFMEMORY);
EE(EE_DELETE) = ER(ER_CANT_DELETE_FILE);
EE(EE_LINK) = ER(ER_ERROR_ON_RENAME);
EE(EE_EOFERR) = ER(ER_UNEXPECTED_EOF);
EE(EE_CANTLOCK) = ER(ER_CANT_LOCK);
EE(EE_DIR) = ER(ER_CANT_READ_DIR);
EE(EE_STAT) = ER(ER_CANT_GET_STAT);
EE(EE_GETWD) = ER(ER_CANT_GET_WD);
EE(EE_SETWD) = ER(ER_CANT_SET_WD);
EE(EE_DISK_FULL) = ER(ER_DISK_FULL);
}
}
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