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Diffstat (limited to '')
| -rw-r--r-- | sql/derror.cc | 391 |
1 files changed, 391 insertions, 0 deletions
diff --git a/sql/derror.cc b/sql/derror.cc new file mode 100644 index 00000000..187d5bc2 --- /dev/null +++ b/sql/derror.cc @@ -0,0 +1,391 @@ +/* Copyright (c) 2000, 2011, Oracle and/or its affiliates. + Copyright (C) 2011, 2020, MariaDB + + 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 02110-1335 USA */ + +/** + @file + + @brief + Read language depeneded messagefile +*/ + +#include "mariadb.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 + +uint errors_per_range[MAX_ERROR_RANGES+1]; + +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(int nr) +{ + int section= (nr-ER_ERROR_FIRST) / ERRORS_PER_RANGE; + if (!current_thd) + return DEFAULT_ERRMSGS[section]; + return CURRENT_THD_ERRMSGS[section]; +} +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 +*/ + +static const char ***original_error_messages; + +bool init_errmessage(void) +{ + const char **errmsgs; + bool error= FALSE; + const char *lang= my_default_lc_messages->errmsgs->language; + my_bool use_english; + + DBUG_ENTER("init_errmessage"); + + free_error_messages(); + my_free(original_error_messages); + original_error_messages= 0; + + error_message_charset_info= system_charset_info; + + use_english= !strcmp(lang, "english"); + if (!use_english) + { + /* Read messages from file. */ + use_english= read_texts(ERRMSG_FILE,lang, &original_error_messages); + error= use_english != FALSE; + if (error) + sql_print_error("Could not load error messages for %s",lang); + } + + if (use_english) + { + static const struct + { + const char* name; + uint id; + const char* fmt; + } + english_msgs[]= + { + #include <mysqld_ername.h> + }; + + memset(errors_per_range, 0, sizeof(errors_per_range)); + /* Calculate nr of messages per range. */ + for (size_t i= 0; i < array_elements(english_msgs); i++) + { + uint id= english_msgs[i].id; + + // We rely on the fact the array is sorted by id. + DBUG_ASSERT(i == 0 || english_msgs[i-1].id < id); + + errors_per_range[id/ERRORS_PER_RANGE-1]= id%ERRORS_PER_RANGE + 1; + } + + size_t all_errors= 0; + for (size_t i= 0; i < MAX_ERROR_RANGES; i++) + all_errors+= errors_per_range[i]; + + if (!(original_error_messages= (const char***) + my_malloc(PSI_NOT_INSTRUMENTED, + (all_errors + MAX_ERROR_RANGES)*sizeof(void*), + MYF(MY_ZEROFILL)))) + DBUG_RETURN(TRUE); + + errmsgs= (const char**)(original_error_messages + MAX_ERROR_RANGES); + + original_error_messages[0]= errmsgs; + for (uint i= 1; i < MAX_ERROR_RANGES; i++) + { + original_error_messages[i]= + original_error_messages[i-1] + errors_per_range[i-1]; + } + + for (uint i= 0; i < array_elements(english_msgs); i++) + { + uint id= english_msgs[i].id; + original_error_messages[id/ERRORS_PER_RANGE-1][id%ERRORS_PER_RANGE]= + english_msgs[i].fmt; + } + } + + /* Register messages for use with my_error(). */ + for (uint i=0 ; i < MAX_ERROR_RANGES ; i++) + { + if (errors_per_range[i]) + { + if (my_error_register(get_server_errmsgs, (i+1)*ERRORS_PER_RANGE, + (i+1)*ERRORS_PER_RANGE + + errors_per_range[i]-1)) + { + my_free(original_error_messages); + original_error_messages= 0; + DBUG_RETURN(TRUE); + } + } + } + DEFAULT_ERRMSGS= original_error_messages; + init_myfunc_errs(); /* Init myfunc messages */ + DBUG_RETURN(error); +} + + +void free_error_messages() +{ + /* We don't need to free errmsg as it's done in cleanup_errmsg */ + for (uint i= 0 ; i < MAX_ERROR_RANGES ; i++) + { + if (errors_per_range[i]) + { + my_error_unregister((i+1)*ERRORS_PER_RANGE, + (i+1)*ERRORS_PER_RANGE + + errors_per_range[i]-1); + errors_per_range[i]= 0; + } + } +} + + +/** + 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. + We also check that each section has enough error messages. + */ + if (errmsg[ER_LAST_MYSQL_ERROR_MESSAGE -1 - ER_ERROR_FIRST][0] == 0 || + (errors_per_range[0] < ER_ERROR_LAST_SECTION_2 - ER_ERROR_FIRST + 1) || + errors_per_range[1] != 0 || + (errors_per_range[2] < ER_ERROR_LAST_SECTION_4 - + ER_ERROR_FIRST_SECTION_4 +1) || + (errors_per_range[3] < ER_ERROR_LAST - ER_ERROR_FIRST_SECTION_5 + 1)) + { + sql_print_error("Error message file '%s' is probably from and older " + "version of MariaDB as it doesn't contain all " + "error messages", file_name); + return 1; + } + return 0; +} + + +struct st_msg_file +{ + uint sections; + uint max_error; + uint errors; + size_t text_length; +}; + +/** + Open file for packed textfile in language-directory. +*/ + +static File open_error_msg_file(const char *file_name, const char *language, + uint error_messages, struct st_msg_file *ret) +{ + int error_pos= 0; + File file; + char name[FN_REFLEN]; + char lang_path[FN_REFLEN]; + uchar head[32]; + DBUG_ENTER("open_error_msg_file"); + + 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 semantics 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; + if (global_system_variables.log_warnings > 2) + { + 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."); + } + } + error_pos=1; + if (mysql_file_read(file, (uchar*) head, 32, MYF(MY_NABP))) + goto err; + error_pos=2; + if (head[0] != (uchar) 254 || head[1] != (uchar) 254 || + head[2] != 2 || head[3] != 4) + goto err; /* purecov: inspected */ + + ret->text_length= uint4korr(head+6); + ret->max_error= uint2korr(head+10); + ret->errors= uint2korr(head+12); + ret->sections= uint2korr(head+14); + + if (unlikely(ret->max_error < error_messages || + ret->sections != MAX_ERROR_RANGES)) + { + 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,ret->errors,error_messages); + (void) mysql_file_close(file, MYF(MY_WME)); + DBUG_RETURN(FERR); + } + DBUG_RETURN(file); + +err: + sql_print_error((error_pos == 2) ? + "Incompatible header in messagefile '%s'. Probably from " + "another version of MariaDB" : + ((error_pos == 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(FERR); +} + + +/* + Define the number of normal and extra error messages in the errmsg.sys + file +*/ + +static const uint error_messages= ER_ERROR_LAST - ER_ERROR_FIRST+1; + +/** + Read text from packed textfile in language-directory. +*/ + +bool read_texts(const char *file_name, const char *language, + const char ****data) +{ + uint i, range_size; + const char **point; + size_t offset; + File file; + uchar *buff, *pos; + struct st_msg_file msg_file; + DBUG_ENTER("read_texts"); + + if (unlikely((file= open_error_msg_file(file_name, language, error_messages, + &msg_file)) == FERR)) + DBUG_RETURN(1); + + if (!(*data= (const char***) + my_malloc(key_memory_errmsgs, + (size_t) ((MAX_ERROR_RANGES+1) * sizeof(char**) + + MY_MAX(msg_file.text_length, msg_file.errors * 2)+ + msg_file.errors * sizeof(char*)), + MYF(MY_WME)))) + goto err; /* purecov: inspected */ + + point= (const char**) ((*data) + MAX_ERROR_RANGES); + buff= (uchar*) (point + msg_file.errors); + + if (mysql_file_read(file, buff, + (size_t) (msg_file.errors + msg_file.sections) * 2, + MYF(MY_NABP | MY_WME))) + goto err; + + pos= buff; + /* read in sections */ + for (i= 0, offset= 0; i < msg_file.sections ; i++) + { + (*data)[i]= point + offset; + errors_per_range[i]= range_size= uint2korr(pos); + offset+= range_size; + pos+= 2; + } + + /* Calculate pointers to text data */ + for (i=0, offset=0 ; i < msg_file.errors ; i++) + { + point[i]= (char*) buff+offset; + offset+=uint2korr(pos); + pos+=2; + } + + /* Read error message texts */ + if (mysql_file_read(file, buff, msg_file.text_length, MYF(MY_NABP | MY_WME))) + goto err; + + (void) mysql_file_close(file, MYF(MY_WME)); + + DBUG_RETURN(check_error_mesg(file_name, point)); + +err: + (void) mysql_file_close(file, MYF(0)); + 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_DEFAULT(ER_FILE_NOT_FOUND); + EE(EE_CANTCREATEFILE) = ER_DEFAULT(ER_CANT_CREATE_FILE); + EE(EE_READ) = ER_DEFAULT(ER_ERROR_ON_READ); + EE(EE_WRITE) = ER_DEFAULT(ER_ERROR_ON_WRITE); + EE(EE_BADCLOSE) = ER_DEFAULT(ER_ERROR_ON_CLOSE); + EE(EE_OUTOFMEMORY) = ER_DEFAULT(ER_OUTOFMEMORY); + EE(EE_DELETE) = ER_DEFAULT(ER_CANT_DELETE_FILE); + EE(EE_LINK) = ER_DEFAULT(ER_ERROR_ON_RENAME); + EE(EE_EOFERR) = ER_DEFAULT(ER_UNEXPECTED_EOF); + EE(EE_CANTLOCK) = ER_DEFAULT(ER_CANT_LOCK); + EE(EE_DIR) = ER_DEFAULT(ER_CANT_READ_DIR); + EE(EE_STAT) = ER_DEFAULT(ER_CANT_GET_STAT); + EE(EE_GETWD) = ER_DEFAULT(ER_CANT_GET_WD); + EE(EE_SETWD) = ER_DEFAULT(ER_CANT_SET_WD); + EE(EE_DISK_FULL) = ER_DEFAULT(ER_DISK_FULL); + } +} |