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/* Copyright (c) 2000, 2011, 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 02110-1335 USA */
#include "mysys_priv.h"
#include "mysys_err.h"
#include <m_string.h>
#include <errno.h>
#include "my_atomic.h"
CREATE_NOSYMLINK_FUNCTION(
open_nosymlinks(const char *pathname, int flags, int mode),
openat(dfd, filename, O_NOFOLLOW | flags, mode),
open(pathname, O_NOFOLLOW | flags, mode)
);
/*
Open a file
SYNOPSIS
my_open()
FileName Fully qualified file name
Flags Read | write
MyFlags Special flags
RETURN VALUE
File descriptor
*/
File my_open(const char *FileName, int Flags, myf MyFlags)
/* Path-name of file */
/* Read | write .. */
/* Special flags */
{
File fd;
DBUG_ENTER("my_open");
DBUG_PRINT("my",("Name: '%s' Flags: %d MyFlags: %lu",
FileName, Flags, MyFlags));
if (!(MyFlags & (MY_WME | MY_FAE | MY_FFNF)))
MyFlags|= my_global_flags;
#if defined(_WIN32)
fd= my_win_open(FileName, Flags);
#else
if (MyFlags & MY_NOSYMLINKS)
fd = open_nosymlinks(FileName, Flags | O_CLOEXEC, my_umask);
else
fd = open(FileName, Flags | O_CLOEXEC, my_umask);
#endif
fd= my_register_filename(fd, FileName, FILE_BY_OPEN,
EE_FILENOTFOUND, MyFlags);
DBUG_RETURN(fd);
} /* my_open */
/*
Close a file
SYNOPSIS
my_close()
fd File sescriptor
myf Special Flags
*/
int my_close(File fd, myf MyFlags)
{
int err;
char *name= NULL;
DBUG_ENTER("my_close");
DBUG_PRINT("my",("fd: %d MyFlags: %lu",fd, MyFlags));
if (!(MyFlags & (MY_WME | MY_FAE)))
MyFlags|= my_global_flags;
if ((uint) fd < my_file_limit && my_file_info[fd].type != UNOPEN)
{
name= my_file_info[fd].name;
my_file_info[fd].name= NULL;
my_file_info[fd].type= UNOPEN;
}
#ifndef _WIN32
err= close(fd);
#else
err= my_win_close(fd);
#endif
if (err)
{
DBUG_PRINT("error",("Got error %d on close",err));
my_errno=errno;
if (MyFlags & (MY_FAE | MY_WME))
my_error(EE_BADCLOSE, MYF(ME_BELL | (MyFlags & (ME_NOTE | ME_ERROR_LOG))),
name,errno);
}
if (name)
{
my_free(name);
}
my_atomic_add32_explicit(&my_file_opened, -1, MY_MEMORY_ORDER_RELAXED);
DBUG_RETURN(err);
} /* my_close */
/*
Register file in my_file_info[]
SYNOPSIS
my_register_filename()
fd File number opened, -1 if error on open
FileName File name
type_file_type How file was created
error_message_number Error message number if caller got error (fd == -1)
MyFlags Flags for my_close()
RETURN
-1 error
# Filenumber
*/
File my_register_filename(File fd, const char *FileName, enum file_type
type_of_file, uint error_message_number, myf MyFlags)
{
DBUG_ENTER("my_register_filename");
if ((int) fd >= MY_FILE_MIN)
{
my_atomic_add32_explicit(&my_file_opened, 1, MY_MEMORY_ORDER_RELAXED);
if ((uint) fd >= my_file_limit || (MyFlags & MY_NO_REGISTER))
DBUG_RETURN(fd);
my_file_info[fd].name = my_strdup(key_memory_my_file_info, FileName, MyFlags);
statistic_increment(my_file_total_opened,&THR_LOCK_open);
my_file_info[fd].type = type_of_file;
DBUG_PRINT("exit",("fd: %d",fd));
DBUG_RETURN(fd);
}
my_errno= errno;
DBUG_PRINT("error",("Got error %d on open", my_errno));
if (MyFlags & (MY_FFNF | MY_FAE | MY_WME))
{
if (my_errno == EMFILE)
error_message_number= EE_OUT_OF_FILERESOURCES;
my_error(error_message_number,
MYF(ME_BELL | (MyFlags & (ME_NOTE | ME_ERROR_LOG))),
FileName, my_errno);
}
DBUG_RETURN(-1);
}
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