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ab1242b9e3
data and index files It was possible if DATA/INDEX DIRECTORY is pointing to symlinked MySQL data home directory. Do not allow to drop data/index files implicitly symlinked to data home directory. For such tables remove symlink only. mysql-test/r/symlink.result: A test case for BUG#40980. mysql-test/t/symlink.test: A test case for BUG#40980. storage/myisam/mi_delete_table.c: Do not allow to drop data/index files implicitly symlinked to data home directory. For such tables remove symlink only.
104 lines
2.9 KiB
C
104 lines
2.9 KiB
C
/* Copyright (C) 2000-2001, 2004, 2006 MySQL AB
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
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/*
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deletes a table
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*/
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#include "fulltext.h"
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/**
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Remove MyISAM data/index file safely
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@details
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If name is a symlink and file it is pointing to is not in
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data directory, file is also removed.
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@param name file to remove
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@returns
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0 on success or my_errno on failure
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*/
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static int _mi_safe_delete_file(const char *name)
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{
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DBUG_ENTER("_mi_safe_delete_file");
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if (my_is_symlink(name) && (*myisam_test_invalid_symlink)(name))
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{
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/*
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Symlink is pointing to file in data directory.
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Remove symlink, keep file.
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*/
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if (my_delete(name, MYF(MY_WME)))
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DBUG_RETURN(my_errno);
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}
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else
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{
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if (my_delete_with_symlink(name, MYF(MY_WME)))
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DBUG_RETURN(my_errno);
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}
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DBUG_RETURN(0);
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}
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int mi_delete_table(const char *name)
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{
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char from[FN_REFLEN];
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#ifdef USE_RAID
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uint raid_type=0,raid_chunks=0;
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#endif
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DBUG_ENTER("mi_delete_table");
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#ifdef EXTRA_DEBUG
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check_table_is_closed(name,"delete");
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#endif
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#ifdef USE_RAID
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{
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MI_INFO *info;
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/*
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When built with RAID support, we need to determine if this table
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makes use of the raid feature. If yes, we need to remove all raid
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chunks. This is done with my_raid_delete(). Unfortunately it is
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necessary to open the table just to check this. We use
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'open_for_repair' to be able to open even a crashed table. If even
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this open fails, we assume no raid configuration for this table
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and try to remove the normal data file only. This may however
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leave the raid chunks behind.
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*/
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if (!(info= mi_open(name, O_RDONLY, HA_OPEN_FOR_REPAIR)))
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raid_type= 0;
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else
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{
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raid_type= info->s->base.raid_type;
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raid_chunks= info->s->base.raid_chunks;
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mi_close(info);
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}
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}
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#ifdef EXTRA_DEBUG
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check_table_is_closed(name,"delete");
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#endif
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#endif /* USE_RAID */
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fn_format(from,name,"",MI_NAME_IEXT,MY_UNPACK_FILENAME|MY_APPEND_EXT);
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if (_mi_safe_delete_file(from))
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DBUG_RETURN(my_errno);
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fn_format(from,name,"",MI_NAME_DEXT,MY_UNPACK_FILENAME|MY_APPEND_EXT);
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#ifdef USE_RAID
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if (raid_type)
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DBUG_RETURN(my_raid_delete(from, raid_chunks, MYF(MY_WME)) ? my_errno : 0);
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#endif
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DBUG_RETURN(_mi_safe_delete_file(from));
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}
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