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/* Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.
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 */
#include "mysys_priv.h"
#include "mysys_err.h"
#include <my_sys.h>
#include "my_thread_local.h"
int my_delete(const char *name, myf MyFlags)
{
int err;
DBUG_ENTER("my_delete");
DBUG_PRINT("my",("name %s MyFlags %d", name, MyFlags));
if ((err = unlink(name)) == -1)
{
set_my_errno(errno);
if (MyFlags & (MY_FAE+MY_WME))
{
char errbuf[MYSYS_STRERROR_SIZE];
my_error(EE_DELETE, MYF(0),
name, errno, my_strerror(errbuf, sizeof(errbuf), errno));
}
}
else if ((MyFlags & MY_SYNC_DIR) &&
my_sync_dir_by_file(name, MyFlags))
err= -1;
DBUG_RETURN(err);
} /* my_delete */
#if defined(_WIN32)
/**
Delete file which is possibly not closed.
This function is intended to be used exclusively as a temporal solution
for Win NT in case when it is needed to delete a not closed file (note
that the file must be opened everywhere with FILE_SHARE_DELETE mode).
Deleting not-closed files can not be supported on Win 98|ME (and because
of that is considered harmful).
The function deletes the file with its preliminary renaming. This is
because when not-closed share-delete file is deleted it still lives on
a disk until it will not be closed everwhere. This may conflict with an
attempt to create a new file with the same name. The deleted file is
renamed to <name>.<num>.deleted where <name> - the initial name of the
file, <num> - a hexadecimal number chosen to make the temporal name to
be unique.
@param the name of the being deleted file
@param the flags instructing how to react on an error internally in
the function
@note The per-thread @c my_errno holds additional info for a caller to
decide how critical the error can be.
@retval
0 ok
@retval
1 error
*/
int nt_share_delete(const char *name, myf MyFlags)
{
char buf[MAX_PATH + 20];
ulong cnt;
DBUG_ENTER("nt_share_delete");
DBUG_PRINT("my",("name %s MyFlags %d", name, MyFlags));
for (cnt= GetTickCount(); cnt; cnt--)
{
errno= 0;
sprintf(buf, "%s.%08X.deleted", name, cnt);
if (MoveFile(name, buf))
break;
if ((errno= GetLastError()) == ERROR_ALREADY_EXISTS)
continue;
/* This happened during tests with MERGE tables. */
if (errno == ERROR_ACCESS_DENIED)
continue;
DBUG_PRINT("warning", ("Failed to rename %s to %s, errno: %d",
name, buf, errno));
break;
}
if (errno == ERROR_FILE_NOT_FOUND)
{
set_my_errno(ENOENT); // marking, that `name' doesn't exist
}
else if (errno == 0)
{
if (DeleteFile(buf))
DBUG_RETURN(0);
/*
The below is more complicated than necessary. For some reason, the
assignment to my_errno clears the error number, which is retrieved
by GetLastError() (VC2005EE). Assigning to errno first, allows to
retrieve the correct value.
*/
errno= GetLastError();
if (errno == 0)
set_my_errno(ENOENT); // marking, that `buf' doesn't exist
else
set_my_errno(errno);
}
else
set_my_errno(errno);
if (MyFlags & (MY_FAE+MY_WME))
{
char errbuf[MYSYS_STRERROR_SIZE];
my_error(EE_DELETE, MYF(0),
name, my_errno(), my_strerror(errbuf, sizeof(errbuf), my_errno()));
}
DBUG_RETURN(-1);
}
#endif
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