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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 "my_sys.h"
#include "mysys_err.h"
#include <my_dir.h>
#include <errno.h>
#include "my_thread_local.h"
/*
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: %d",
FileName, Flags, MyFlags));
#if defined(_WIN32)
fd= my_win_open(FileName, Flags);
#else
fd = open(FileName, Flags, my_umask); /* Normal unix */
#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;
DBUG_ENTER("my_close");
DBUG_PRINT("my",("fd: %d MyFlags: %d",fd, MyFlags));
mysql_mutex_lock(&THR_LOCK_open);
#ifndef _WIN32
do
{
err= close(fd);
} while (err == -1 && errno == EINTR);
#else
err= my_win_close(fd);
#endif
if (err)
{
DBUG_PRINT("error",("Got error %d on close",err));
set_my_errno(errno);
if (MyFlags & (MY_FAE | MY_WME))
{
char errbuf[MYSYS_STRERROR_SIZE];
my_error(EE_BADCLOSE, MYF(0), my_filename(fd),
my_errno(), my_strerror(errbuf, sizeof(errbuf), my_errno()));
}
}
if ((uint) fd < my_file_limit && my_file_info[fd].type != UNOPEN)
{
my_free(my_file_info[fd].name);
my_file_info[fd].type = UNOPEN;
}
my_file_opened--;
mysql_mutex_unlock(&THR_LOCK_open);
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)
{
char *dup_filename= NULL;
DBUG_ENTER("my_register_filename");
if ((int) fd >= MY_FILE_MIN)
{
if ((uint) fd >= my_file_limit)
{
#if defined(_WIN32)
set_my_errno(EMFILE);
#else
mysql_mutex_lock(&THR_LOCK_open);
my_file_opened++;
mysql_mutex_unlock(&THR_LOCK_open);
DBUG_RETURN(fd); /* safeguard */
#endif
}
else
{
dup_filename= my_strdup(key_memory_my_file_info, FileName, MyFlags);
if (dup_filename != NULL)
{
mysql_mutex_lock(&THR_LOCK_open);
my_file_info[fd].name= dup_filename;
my_file_opened++;
my_file_total_opened++;
my_file_info[fd].type = type_of_file;
mysql_mutex_unlock(&THR_LOCK_open);
DBUG_PRINT("exit",("fd: %d",fd));
DBUG_RETURN(fd);
}
set_my_errno(ENOMEM);
}
(void) my_close(fd, MyFlags);
}
else
set_my_errno(errno);
DBUG_PRINT("error",("Got error %d on open", my_errno()));
if (MyFlags & (MY_FFNF | MY_FAE | MY_WME))
{
char errbuf[MYSYS_STRERROR_SIZE];
if (my_errno() == EMFILE)
error_message_number= EE_OUT_OF_FILERESOURCES;
DBUG_PRINT("error",("print err: %d",error_message_number));
my_error(error_message_number, MYF(0), FileName,
my_errno(), my_strerror(errbuf, sizeof(errbuf), my_errno()));
}
DBUG_RETURN(-1);
}
#ifdef EXTRA_DEBUG
void my_print_open_files(void)
{
if (my_file_opened | my_stream_opened)
{
uint i;
for (i= 0 ; i < my_file_limit ; i++)
{
if (my_file_info[i].type != UNOPEN)
{
my_message_local(INFORMATION_LEVEL,
EE(EE_FILE_NOT_CLOSED), my_file_info[i].name, i);
}
}
}
}
#endif
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