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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 "mysql_priv.h"
#include "mysys_err.h"
static bool check_error_mesg(const char *file_name, const char **errmsg);
static bool read_texts(const char *file_name,const char ***point,
uint error_messages);
static void init_myfunc_errs(void);
/**
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, &errmsgs, ER_ERROR_LAST - ER_ERROR_FIRST + 1) ||
check_error_mesg(ERRMSG_FILE, errmsgs))
{
x_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
x_free(org_errmsgs); // Free old language
/* Register messages for use with my_error(). */
if (my_error_register(errmsgs, ER_ERROR_FIRST, ER_ERROR_LAST))
{
x_free((uchar*) errmsgs);
DBUG_RETURN(TRUE);
}
errmesg= errmsgs; /* Init global variabel */
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.
@todo
Convert the character set to server system character set
*/
static bool read_texts(const char *file_name,const char ***point,
uint error_messages)
{
register uint i;
uint count,funktpos,textcount;
size_t length;
File file;
char name[FN_REFLEN];
uchar *buff;
uchar head[32],*pos;
DBUG_ENTER("read_texts");
*point= 0;
LINT_INIT(buff);
funktpos=0;
if ((file=my_open(fn_format(name,file_name,language,"",4),
O_RDONLY | O_SHARE | O_BINARY,
MYF(0))) < 0)
goto err; /* purecov: inspected */
funktpos=1;
if (my_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] != 1)
goto err; /* purecov: inspected */
textcount=head[4];
if (!head[30])
{
sql_print_error("Character set information not found in '%s'. \
Please install the latest version of this file.",name);
goto err1;
}
/* TODO: Convert the character set to server system character set */
if (!get_charset(head[30],MYF(MY_WME)))
{
sql_print_error("Character set #%d is not supported for messagefile '%s'",
(int)head[30],name);
goto err1;
}
length=uint2korr(head+6); count=uint2korr(head+8);
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(my_close(file,MYF(MY_WME)));
DBUG_RETURN(1);
}
if (!(*point= (const char**)
my_malloc((size_t) (length+count*sizeof(char*)),MYF(0))))
{
funktpos=3; /* purecov: inspected */
goto err; /* purecov: inspected */
}
buff= (uchar*) (*point + count);
if (my_read(file, buff, (size_t) count*2,MYF(MY_NABP)))
goto err;
for (i=0, pos= buff ; i< count ; i++)
{
(*point)[i]= (char*) buff+uint2korr(pos);
pos+=2;
}
if (my_read(file, buff, length, MYF(MY_NABP)))
goto err;
for (i=1 ; i < textcount ; i++)
{
point[i]= *point +uint2korr(head+10+i+i);
}
VOID(my_close(file,MYF(0)));
DBUG_RETURN(0);
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);
err1:
if (file != FERR)
VOID(my_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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