/* Copyright (C) 2000-2003 MySQL 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; either version 2 of the License, or (at your option) any later version. 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ /* create and drop of databases */ #include "mysql_priv.h" #include <mysys_err.h> #include "sp.h" #include <my_dir.h> #include <m_ctype.h> #ifdef __WIN__ #include <direct.h> #endif #define MAX_DROP_TABLE_Q_LEN 1024 const char *del_exts[]= {".frm", ".BAK", ".TMD",".opt", NullS}; static TYPELIB deletable_extentions= {array_elements(del_exts)-1,"del_exts", del_exts, NULL}; static long mysql_rm_known_files(THD *thd, MY_DIR *dirp, const char *db, const char *path, uint level, TABLE_LIST **dropped_tables); static long mysql_rm_arc_files(THD *thd, MY_DIR *dirp, const char *org_path); static my_bool rm_dir_w_symlink(const char *org_path, my_bool send_error); /* Database options hash */ static HASH dboptions; static my_bool dboptions_init= 0; static rw_lock_t LOCK_dboptions; /* Structure for database options */ typedef struct my_dbopt_st { char *name; /* Database name */ uint name_length; /* Database length name */ CHARSET_INFO *charset; /* Database default character set */ } my_dbopt_t; /* Function we use in the creation of our hash to get key. */ static byte* dboptions_get_key(my_dbopt_t *opt, uint *length, my_bool not_used __attribute__((unused))) { *length= opt->name_length; return (byte*) opt->name; } /* Helper function to write a query to binlog used by mysql_rm_db() */ static inline void write_to_binlog(THD *thd, char *query, uint q_len, char *db, uint db_len) { Query_log_event qinfo(thd, query, q_len, 0, 0); qinfo.error_code= 0; qinfo.db= db; qinfo.db_len= db_len; mysql_bin_log.write(&qinfo); } /* Function to free dboptions hash element */ static void free_dbopt(void *dbopt) { my_free((gptr) dbopt, MYF(0)); } /* Initialize database option hash SYNOPSIS my_dbopt_init() NOTES Must be called before any other database function is called. RETURN 0 ok 1 Fatal error */ bool my_dbopt_init(void) { bool error= 0; (void) my_rwlock_init(&LOCK_dboptions, NULL); if (!dboptions_init) { dboptions_init= 1; error= hash_init(&dboptions, lower_case_table_names ? &my_charset_bin : system_charset_info, 32, 0, 0, (hash_get_key) dboptions_get_key, free_dbopt,0); } return error; } /* Free database option hash. */ void my_dbopt_free(void) { if (dboptions_init) { dboptions_init= 0; hash_free(&dboptions); (void) rwlock_destroy(&LOCK_dboptions); } } void my_dbopt_cleanup(void) { rw_wrlock(&LOCK_dboptions); hash_free(&dboptions); hash_init(&dboptions, lower_case_table_names ? &my_charset_bin : system_charset_info, 32, 0, 0, (hash_get_key) dboptions_get_key, free_dbopt,0); rw_unlock(&LOCK_dboptions); } /* Find database options in the hash. DESCRIPTION Search a database options in the hash, usings its path. Fills "create" on success. RETURN VALUES 0 on success. 1 on error. */ static my_bool get_dbopt(const char *dbname, HA_CREATE_INFO *create) { my_dbopt_t *opt; uint length; my_bool error= 1; length= (uint) strlen(dbname); rw_rdlock(&LOCK_dboptions); if ((opt= (my_dbopt_t*) hash_search(&dboptions, (byte*) dbname, length))) { create->default_table_charset= opt->charset; error= 0; } rw_unlock(&LOCK_dboptions); return error; } /* Writes database options into the hash. DESCRIPTION Inserts database options into the hash, or updates options if they are already in the hash. RETURN VALUES 0 on success. 1 on error. */ static my_bool put_dbopt(const char *dbname, HA_CREATE_INFO *create) { my_dbopt_t *opt; uint length; my_bool error= 0; DBUG_ENTER("put_dbopt"); length= (uint) strlen(dbname); rw_wrlock(&LOCK_dboptions); if (!(opt= (my_dbopt_t*) hash_search(&dboptions, (byte*) dbname, length))) { /* Options are not in the hash, insert them */ char *tmp_name; if (!my_multi_malloc(MYF(MY_WME | MY_ZEROFILL), &opt, (uint) sizeof(*opt), &tmp_name, length+1, NullS)) { error= 1; goto end; } opt->name= tmp_name; strmov(opt->name, dbname); opt->name_length= length; if ((error= my_hash_insert(&dboptions, (byte*) opt))) { my_free((gptr) opt, MYF(0)); goto end; } } /* Update / write options in hash */ opt->charset= create->default_table_charset; end: rw_unlock(&LOCK_dboptions); DBUG_RETURN(error); } /* Deletes database options from the hash. */ void del_dbopt(const char *path) { my_dbopt_t *opt; rw_wrlock(&LOCK_dboptions); if ((opt= (my_dbopt_t *)hash_search(&dboptions, (const byte*) path, strlen(path)))) hash_delete(&dboptions, (byte*) opt); rw_unlock(&LOCK_dboptions); } /* Create database options file: DESCRIPTION Currently database default charset is only stored there. RETURN VALUES 0 ok 1 Could not create file or write to it. Error sent through my_error() */ static bool write_db_opt(THD *thd, const char *path, HA_CREATE_INFO *create) { register File file; char buf[256]; // Should be enough for one option bool error=1; if (!create->default_table_charset) create->default_table_charset= thd->variables.collation_server; if (put_dbopt(path, create)) return 1; if ((file=my_create(path, CREATE_MODE,O_RDWR | O_TRUNC,MYF(MY_WME))) >= 0) { ulong length; length= (ulong) (strxnmov(buf, sizeof(buf)-1, "default-character-set=", create->default_table_charset->csname, "\ndefault-collation=", create->default_table_charset->name, "\n", NullS) - buf); /* Error is written by my_write */ if (!my_write(file,(byte*) buf, length, MYF(MY_NABP+MY_WME))) error=0; my_close(file,MYF(0)); } return error; } /* Load database options file load_db_opt() path Path for option file create Where to store the read options DESCRIPTION For now, only default-character-set is read. RETURN VALUES 0 File found 1 No database file or could not open it */ bool load_db_opt(THD *thd, const char *path, HA_CREATE_INFO *create) { File file; char buf[256]; DBUG_ENTER("load_db_opt"); bool error=1; uint nbytes; bzero((char*) create,sizeof(*create)); create->default_table_charset= thd->variables.collation_server; /* Check if options for this database are already in the hash */ if (!get_dbopt(path, create)) DBUG_RETURN(0); /* Otherwise, load options from the .opt file */ if ((file=my_open(path, O_RDONLY | O_SHARE, MYF(0))) < 0) goto err1; IO_CACHE cache; if (init_io_cache(&cache, file, IO_SIZE, READ_CACHE, 0, 0, MYF(0))) goto err2; while ((int) (nbytes= my_b_gets(&cache, (char*) buf, sizeof(buf))) > 0) { char *pos= buf+nbytes-1; /* Remove end space and control characters */ while (pos > buf && !my_isgraph(&my_charset_latin1, pos[-1])) pos--; *pos=0; if ((pos= strchr(buf, '='))) { if (!strncmp(buf,"default-character-set", (pos-buf))) { /* Try character set name, and if it fails try collation name, probably it's an old 4.1.0 db.opt file, which didn't have separate default-character-set and default-collation commands. */ if (!(create->default_table_charset= get_charset_by_csname(pos+1, MY_CS_PRIMARY, MYF(0))) && !(create->default_table_charset= get_charset_by_name(pos+1, MYF(0)))) { sql_print_error("Error while loading database options: '%s':",path); sql_print_error(ER(ER_UNKNOWN_CHARACTER_SET),pos+1); create->default_table_charset= default_charset_info; } } else if (!strncmp(buf,"default-collation", (pos-buf))) { if (!(create->default_table_charset= get_charset_by_name(pos+1, MYF(0)))) { sql_print_error("Error while loading database options: '%s':",path); sql_print_error(ER(ER_UNKNOWN_COLLATION),pos+1); create->default_table_charset= default_charset_info; } } } } /* Put the loaded value into the hash. Note that another thread could've added the same entry to the hash after we called get_dbopt(), but it's not an error, as put_dbopt() takes this possibility into account. */ error= put_dbopt(path, create); end_io_cache(&cache); err2: my_close(file,MYF(0)); err1: DBUG_RETURN(error); } /* Create a database SYNOPSIS mysql_create_db() thd Thread handler db Name of database to create Function assumes that this is already validated. create_info Database create options (like character set) silent Used by replication when internally creating a database. In this case the entry should not be logged. RETURN VALUES FALSE ok TRUE Error */ bool mysql_create_db(THD *thd, char *db, HA_CREATE_INFO *create_info, bool silent) { char path[FN_REFLEN+16]; char tmp_query[FN_REFLEN+16]; long result= 1; int error= 0; MY_STAT stat_info; uint create_options= create_info ? create_info->options : 0; uint path_len; DBUG_ENTER("mysql_create_db"); /* do not create 'information_schema' db */ if (!my_strcasecmp(system_charset_info, db, information_schema_name.str)) { my_error(ER_DB_CREATE_EXISTS, MYF(0), db); DBUG_RETURN(-1); } VOID(pthread_mutex_lock(&LOCK_mysql_create_db)); /* do not create database if another thread is holding read lock */ if (wait_if_global_read_lock(thd, 0, 1)) { error= -1; goto exit2; } /* Check directory */ path_len= build_table_filename(path, sizeof(path), db, "", ""); path[path_len-1]= 0; // Remove last '/' from path if (my_stat(path,&stat_info,MYF(0))) { if (!(create_options & HA_LEX_CREATE_IF_NOT_EXISTS)) { my_error(ER_DB_CREATE_EXISTS, MYF(0), db); error= -1; goto exit; } push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_NOTE, ER_DB_CREATE_EXISTS, ER(ER_DB_CREATE_EXISTS), db); error= 0; if (!silent) send_ok(thd); goto exit; } else { if (my_errno != ENOENT) { my_error(EE_STAT, MYF(0), path, my_errno); goto exit; } if (my_mkdir(path,0777,MYF(0)) < 0) { my_error(ER_CANT_CREATE_DB, MYF(0), db, my_errno); error= -1; goto exit; } } path[path_len-1]= FN_LIBCHAR; strmake(path+path_len, MY_DB_OPT_FILE, sizeof(path)-path_len-1); if (write_db_opt(thd, path, create_info)) { /* Could not create options file. Restore things to beginning. */ path[path_len]= 0; if (rmdir(path) >= 0) { error= -1; goto exit; } /* We come here when we managed to create the database, but not the option file. In this case it's best to just continue as if nothing has happened. (This is a very unlikely senario) */ } if (!silent) { char *query; uint query_length; if (!thd->query) // Only in replication { query= tmp_query; query_length= (uint) (strxmov(tmp_query,"create database `", db, "`", NullS) - tmp_query); } else { query= thd->query; query_length= thd->query_length; } ha_binlog_log_query(thd, 0, LOGCOM_CREATE_DB, query, query_length, db, ""); if (mysql_bin_log.is_open()) { Query_log_event qinfo(thd, query, query_length, 0, /* suppress_use */ TRUE); /* Write should use the database being created as the "current database" and not the threads current database, which is the default. If we do not change the "current database" to the database being created, the CREATE statement will not be replicated when using --binlog-do-db to select databases to be replicated. An example (--binlog-do-db=sisyfos): CREATE DATABASE bob; # Not replicated USE bob; # 'bob' is the current database CREATE DATABASE sisyfos; # Not replicated since 'bob' is # current database. USE sisyfos; # Will give error on slave since # database does not exist. */ qinfo.db = db; qinfo.db_len = strlen(db); mysql_bin_log.write(&qinfo); } send_ok(thd, result); } exit: start_waiting_global_read_lock(thd); exit2: VOID(pthread_mutex_unlock(&LOCK_mysql_create_db)); DBUG_RETURN(error); } /* db-name is already validated when we come here */ bool mysql_alter_db(THD *thd, const char *db, HA_CREATE_INFO *create_info) { char path[FN_REFLEN+16]; long result=1; int error= 0; DBUG_ENTER("mysql_alter_db"); VOID(pthread_mutex_lock(&LOCK_mysql_create_db)); /* do not alter database if another thread is holding read lock */ if ((error=wait_if_global_read_lock(thd,0,1))) goto exit2; /* Recreate db options file: /dbpath/.db.opt We pass MY_DB_OPT_FILE as "extension" to avoid "table name to file name" encoding. */ build_table_filename(path, sizeof(path), db, "", MY_DB_OPT_FILE); if ((error=write_db_opt(thd, path, create_info))) goto exit; /* Change options if current database is being altered TODO: Delete this code */ if (thd->db && !strcmp(thd->db,db)) { thd->db_charset= create_info->default_table_charset ? create_info->default_table_charset : thd->variables.collation_server; thd->variables.collation_database= thd->db_charset; } ha_binlog_log_query(thd, 0, LOGCOM_ALTER_DB, thd->query, thd->query_length, db, ""); if (mysql_bin_log.is_open()) { Query_log_event qinfo(thd, thd->query, thd->query_length, 0, /* suppress_use */ TRUE); /* Write should use the database being created as the "current database" and not the threads current database, which is the default. */ qinfo.db = db; qinfo.db_len = strlen(db); thd->clear_error(); mysql_bin_log.write(&qinfo); } send_ok(thd, result); exit: start_waiting_global_read_lock(thd); exit2: VOID(pthread_mutex_unlock(&LOCK_mysql_create_db)); DBUG_RETURN(error); } /* Drop all tables in a database and the database itself SYNOPSIS mysql_rm_db() thd Thread handle db Database name in the case given by user It's already validated and set to lower case (if needed) when we come here if_exists Don't give error if database doesn't exists silent Don't generate errors RETURN FALSE ok (Database dropped) ERROR Error */ bool mysql_rm_db(THD *thd,char *db,bool if_exists, bool silent) { long deleted=0; int error= 0; char path[FN_REFLEN+16]; MY_DIR *dirp; uint length; TABLE_LIST* dropped_tables= 0; DBUG_ENTER("mysql_rm_db"); VOID(pthread_mutex_lock(&LOCK_mysql_create_db)); /* do not drop database if another thread is holding read lock */ if (wait_if_global_read_lock(thd, 0, 1)) { error= -1; goto exit2; } length= build_table_filename(path, sizeof(path), db, "", ""); strmov(path+length, MY_DB_OPT_FILE); // Append db option file name del_dbopt(path); // Remove dboption hash entry path[length]= '\0'; // Remove file name /* See if the directory exists */ if (!(dirp= my_dir(path,MYF(MY_DONT_SORT)))) { if (!if_exists) { error= -1; my_error(ER_DB_DROP_EXISTS, MYF(0), db); goto exit; } else push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_NOTE, ER_DB_DROP_EXISTS, ER(ER_DB_DROP_EXISTS), db); } else { pthread_mutex_lock(&LOCK_open); remove_db_from_cache(db); pthread_mutex_unlock(&LOCK_open); error= -1; if ((deleted= mysql_rm_known_files(thd, dirp, db, path, 0, &dropped_tables)) >= 0) { ha_drop_database(path); query_cache_invalidate1(db); error = 0; } } if (!silent && deleted>=0) { const char *query; ulong query_length; if (!thd->query) { /* The client used the old obsolete mysql_drop_db() call */ query= path; query_length= (uint) (strxmov(path, "drop database `", db, "`", NullS) - path); } else { query =thd->query; query_length= thd->query_length; } if (mysql_bin_log.is_open()) { Query_log_event qinfo(thd, query, query_length, 0, /* suppress_use */ TRUE); /* Write should use the database being created as the "current database" and not the threads current database, which is the default. */ qinfo.db = db; qinfo.db_len = strlen(db); thd->clear_error(); mysql_bin_log.write(&qinfo); } thd->server_status|= SERVER_STATUS_DB_DROPPED; send_ok(thd, (ulong) deleted); thd->server_status&= ~SERVER_STATUS_DB_DROPPED; } else if (mysql_bin_log.is_open()) { char *query, *query_pos, *query_end, *query_data_start; TABLE_LIST *tbl; uint db_len; if (!(query= thd->alloc(MAX_DROP_TABLE_Q_LEN))) goto exit; /* not much else we can do */ query_pos= query_data_start= strmov(query,"drop table "); query_end= query + MAX_DROP_TABLE_Q_LEN; db_len= strlen(db); for (tbl= dropped_tables; tbl; tbl= tbl->next_local) { uint tbl_name_len; /* 3 for the quotes and the comma*/ tbl_name_len= strlen(tbl->table_name) + 3; if (query_pos + tbl_name_len + 1 >= query_end) { write_to_binlog(thd, query, query_pos -1 - query, db, db_len); query_pos= query_data_start; } *query_pos++ = '`'; query_pos= strmov(query_pos,tbl->table_name); *query_pos++ = '`'; *query_pos++ = ','; } if (query_pos != query_data_start) { write_to_binlog(thd, query, query_pos -1 - query, db, db_len); } } exit: (void)sp_drop_db_routines(thd, db); /* QQ Ignore errors for now */ start_waiting_global_read_lock(thd); /* If this database was the client's selected database, we silently change the client's selected database to nothing (to have an empty SELECT DATABASE() in the future). For this we free() thd->db and set it to 0. But we don't do free() for the slave thread. Indeed, doing a x_free() on it leads to nasty problems (i.e. long painful debugging) because in this thread, thd->db is the same as data_buf and db of the Query_log_event which is dropping the database. So if you free() thd->db, you're freeing data_buf. You set thd->db to 0 but not data_buf (thd->db and data_buf are two distinct pointers which point to the same place). Then in ~Query_log_event(), we have 'if (data_buf) free(data_buf)' data_buf is !=0 so this makes a DOUBLE free(). Side effects of this double free() are, randomly (depends on the machine), when the slave is replicating a DROP DATABASE: - garbage characters in the error message: "Error 'Can't drop database 'test2'; database doesn't exist' on query 'h4zI��'" - segfault - hang in "free(vio)" (yes!) in the I/O or SQL slave threads (so slave server hangs at shutdown etc). */ if (thd->db && !strcmp(thd->db, db)) { if (!(thd->slave_thread)) /* a slave thread will free it itself */ x_free(thd->db); thd->db= 0; thd->db_length= 0; } exit2: VOID(pthread_mutex_unlock(&LOCK_mysql_create_db)); DBUG_RETURN(error); } /* Removes files with known extensions plus all found subdirectories that are 2 hex digits (raid directories). thd MUST be set when calling this function! */ static long mysql_rm_known_files(THD *thd, MY_DIR *dirp, const char *db, const char *org_path, uint level, TABLE_LIST **dropped_tables) { long deleted=0; ulong found_other_files=0; char filePath[FN_REFLEN]; TABLE_LIST *tot_list=0, **tot_list_next; List<String> raid_dirs; DBUG_ENTER("mysql_rm_known_files"); DBUG_PRINT("enter",("path: %s", org_path)); tot_list_next= &tot_list; for (uint idx=0 ; idx < (uint) dirp->number_off_files && !thd->killed ; idx++) { FILEINFO *file=dirp->dir_entry+idx; char *extension; DBUG_PRINT("info",("Examining: %s", file->name)); /* skiping . and .. */ if (file->name[0] == '.' && (!file->name[1] || (file->name[1] == '.' && !file->name[2]))) continue; /* Check if file is a raid directory */ if ((my_isdigit(system_charset_info, file->name[0]) || (file->name[0] >= 'a' && file->name[0] <= 'f')) && (my_isdigit(system_charset_info, file->name[1]) || (file->name[1] >= 'a' && file->name[1] <= 'f')) && !file->name[2] && !level) { char newpath[FN_REFLEN], *copy_of_path; MY_DIR *new_dirp; String *dir; uint length; strxmov(newpath,org_path,"/",file->name,NullS); length= unpack_filename(newpath,newpath); if ((new_dirp = my_dir(newpath,MYF(MY_DONT_SORT)))) { DBUG_PRINT("my",("New subdir found: %s", newpath)); if ((mysql_rm_known_files(thd, new_dirp, NullS, newpath,1,0)) < 0) goto err; if (!(copy_of_path= thd->memdup(newpath, length+1)) || !(dir= new (thd->mem_root) String(copy_of_path, length, &my_charset_bin)) || raid_dirs.push_back(dir)) goto err; continue; } found_other_files++; continue; } else if (file->name[0] == 'a' && file->name[1] == 'r' && file->name[2] == 'c' && file->name[3] == '\0') { /* .frm archive */ char newpath[FN_REFLEN]; MY_DIR *new_dirp; strxmov(newpath, org_path, "/", "arc", NullS); (void) unpack_filename(newpath, newpath); if ((new_dirp = my_dir(newpath, MYF(MY_DONT_SORT)))) { DBUG_PRINT("my",("Archive subdir found: %s", newpath)); if ((mysql_rm_arc_files(thd, new_dirp, newpath)) < 0) goto err; continue; } found_other_files++; continue; } if (!(extension= strrchr(file->name, '.'))) extension= strend(file->name); if (find_type(extension, &deletable_extentions,1+2) <= 0) { if (find_type(extension, ha_known_exts(),1+2) <= 0) found_other_files++; continue; } /* just for safety we use files_charset_info */ if (db && !my_strcasecmp(files_charset_info, extension, reg_ext)) { /* Drop the table nicely */ *extension= 0; // Remove extension TABLE_LIST *table_list=(TABLE_LIST*) thd->calloc(sizeof(*table_list)+ strlen(db)+strlen(file->name)+2); if (!table_list) goto err; table_list->db= (char*) (table_list+1); table_list->table_name= strmov(table_list->db, db) + 1; VOID(filename_to_tablename(file->name, table_list->table_name, strlen(file->name) + 1)); table_list->alias= table_list->table_name; // If lower_case_table_names=2 /* Link into list */ (*tot_list_next)= table_list; tot_list_next= &table_list->next_local; deleted++; } else { strxmov(filePath, org_path, "/", file->name, NullS); if (my_delete_with_symlink(filePath,MYF(MY_WME))) { goto err; } } } if (thd->killed || (tot_list && mysql_rm_table_part2_with_lock(thd, tot_list, 1, 0, 1))) goto err; /* Remove RAID directories */ { List_iterator<String> it(raid_dirs); String *dir; while ((dir= it++)) if (rmdir(dir->c_ptr()) < 0) found_other_files++; } my_dirend(dirp); if (dropped_tables) *dropped_tables= tot_list; /* If the directory is a symbolic link, remove the link first, then remove the directory the symbolic link pointed at */ if (found_other_files) { my_error(ER_DB_DROP_RMDIR, MYF(0), org_path, EEXIST); DBUG_RETURN(-1); } else { /* Don't give errors if we can't delete 'RAID' directory */ if (rm_dir_w_symlink(org_path, level == 0)) DBUG_RETURN(-1); } DBUG_RETURN(deleted); err: my_dirend(dirp); DBUG_RETURN(-1); } /* Remove directory with symlink SYNOPSIS rm_dir_w_symlink() org_path path of derictory send_error send errors RETURN 0 OK 1 ERROR */ static my_bool rm_dir_w_symlink(const char *org_path, my_bool send_error) { char tmp_path[FN_REFLEN], *pos; char *path= tmp_path; DBUG_ENTER("rm_dir_w_symlink"); unpack_filename(tmp_path, org_path); #ifdef HAVE_READLINK int error; char tmp2_path[FN_REFLEN]; /* Remove end FN_LIBCHAR as this causes problem on Linux in readlink */ pos= strend(path); if (pos > path && pos[-1] == FN_LIBCHAR) *--pos=0; if ((error= my_readlink(tmp2_path, path, MYF(MY_WME))) < 0) DBUG_RETURN(1); if (!error) { if (my_delete(path, MYF(send_error ? MY_WME : 0))) { DBUG_RETURN(send_error); } /* Delete directory symbolic link pointed at */ path= tmp2_path; } #endif /* Remove last FN_LIBCHAR to not cause a problem on OS/2 */ pos= strend(path); if (pos > path && pos[-1] == FN_LIBCHAR) *--pos=0; if (rmdir(path) < 0 && send_error) { my_error(ER_DB_DROP_RMDIR, MYF(0), path, errno); DBUG_RETURN(1); } DBUG_RETURN(0); } /* Remove .frm archives from directory SYNOPSIS thd thread handler dirp list of files in archive directory db data base name org_path path of archive directory RETURN > 0 number of removed files -1 error */ static long mysql_rm_arc_files(THD *thd, MY_DIR *dirp, const char *org_path) { long deleted= 0; ulong found_other_files= 0; char filePath[FN_REFLEN]; DBUG_ENTER("mysql_rm_arc_files"); DBUG_PRINT("enter", ("path: %s", org_path)); for (uint idx=0 ; idx < (uint) dirp->number_off_files && !thd->killed ; idx++) { FILEINFO *file=dirp->dir_entry+idx; char *extension, *revision; DBUG_PRINT("info",("Examining: %s", file->name)); /* skiping . and .. */ if (file->name[0] == '.' && (!file->name[1] || (file->name[1] == '.' && !file->name[2]))) continue; extension= fn_ext(file->name); if (extension[0] != '.' || extension[1] != 'f' || extension[2] != 'r' || extension[3] != 'm' || extension[4] != '-') { found_other_files++; continue; } revision= extension+5; while (*revision && my_isdigit(system_charset_info, *revision)) revision++; if (*revision) { found_other_files++; continue; } strxmov(filePath, org_path, "/", file->name, NullS); if (my_delete_with_symlink(filePath,MYF(MY_WME))) { goto err; } } if (thd->killed) goto err; my_dirend(dirp); /* If the directory is a symbolic link, remove the link first, then remove the directory the symbolic link pointed at */ if (!found_other_files && rm_dir_w_symlink(org_path, 0)) DBUG_RETURN(-1); DBUG_RETURN(deleted); err: my_dirend(dirp); DBUG_RETURN(-1); } /* Change default database. SYNOPSIS mysql_change_db() thd Thread handler name Databasename no_access_check True don't do access check. In this case name may be "" DESCRIPTION Becasue the database name may have been given directly from the communication packet (in case of 'connect' or 'COM_INIT_DB') we have to do end space removal in this function. NOTES Do as little as possible in this function, as it is not called for the replication slave SQL thread (for that thread, setting of thd->db is done in ::exec_event() methods of log_event.cc). This function does not send anything, including error messages to the client, if that should be sent to the client, call net_send_error after this function. RETURN VALUES 0 ok 1 error */ bool mysql_change_db(THD *thd, const char *name, bool no_access_check) { int length, db_length; char *dbname=my_strdup((char*) name,MYF(MY_WME)); char path[FN_REFLEN]; HA_CREATE_INFO create; bool system_db= 0; #ifndef NO_EMBEDDED_ACCESS_CHECKS ulong db_access; Security_context *sctx= thd->security_ctx; #endif DBUG_ENTER("mysql_change_db"); DBUG_PRINT("enter",("name: '%s'",name)); /* dbname can only be NULL if malloc failed */ if (!dbname || !(db_length= strlen(dbname))) { if (no_access_check && dbname) { /* Called from SP when orignal database was not set */ system_db= 1; goto end; } x_free(dbname); /* purecov: inspected */ my_message(ER_NO_DB_ERROR, ER(ER_NO_DB_ERROR), MYF(0)); /* purecov: inspected */ DBUG_RETURN(1); /* purecov: inspected */ } if (check_db_name(dbname)) { my_error(ER_WRONG_DB_NAME, MYF(0), dbname); x_free(dbname); DBUG_RETURN(1); } DBUG_PRINT("info",("Use database: %s", dbname)); if (!my_strcasecmp(system_charset_info, dbname, information_schema_name.str)) { system_db= 1; #ifndef NO_EMBEDDED_ACCESS_CHECKS db_access= SELECT_ACL; #endif goto end; } #ifndef NO_EMBEDDED_ACCESS_CHECKS if (!no_access_check) { if (test_all_bits(sctx->master_access, DB_ACLS)) db_access=DB_ACLS; else db_access= (acl_get(sctx->host, sctx->ip, sctx->priv_user, dbname, 0) | sctx->master_access); if (!(db_access & DB_ACLS) && (!grant_option || check_grant_db(thd,dbname))) { my_error(ER_DBACCESS_DENIED_ERROR, MYF(0), sctx->priv_user, sctx->priv_host, dbname); general_log_print(thd, COM_INIT_DB, ER(ER_DBACCESS_DENIED_ERROR), sctx->priv_user, sctx->priv_host, dbname); my_free(dbname,MYF(0)); DBUG_RETURN(1); } } #endif length= build_table_filename(path, sizeof(path), dbname, "", ""); if (length && path[length-1] == FN_LIBCHAR) path[length-1]=0; // remove ending '\' if (my_access(path,F_OK)) { my_error(ER_BAD_DB_ERROR, MYF(0), dbname); my_free(dbname,MYF(0)); DBUG_RETURN(1); } end: if (!(thd->slave_thread)) x_free(thd->db); if (dbname && dbname[0] == 0) { if (!(thd->slave_thread)) x_free(dbname); thd->db= NULL; thd->db_length= 0; } else { thd->db= dbname; // THD::~THD will free this thd->db_length= db_length; } #ifndef NO_EMBEDDED_ACCESS_CHECKS if (!no_access_check) sctx->db_access= db_access; #endif if (system_db) { thd->db_charset= system_charset_info; thd->variables.collation_database= system_charset_info; } else { strmov(path+unpack_dirname(path,path), MY_DB_OPT_FILE); load_db_opt(thd, path, &create); thd->db_charset= create.default_table_charset ? create.default_table_charset : thd->variables.collation_server; thd->variables.collation_database= thd->db_charset; } DBUG_RETURN(0); }