124 lines
3.5 KiB
C++
124 lines
3.5 KiB
C++
/* Copyright (c) 2000, 2024, Oracle and/or its affiliates.
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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, version 2.0,
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as published by the Free Software Foundation.
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This program is designed to work with certain software (including
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but not limited to OpenSSL) that is licensed under separate terms,
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as designated in a particular file or component or in included license
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documentation. The authors of MySQL hereby grant you an additional
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permission to link the program and your derivative works with the
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separately licensed software that they have either included with
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the program or referenced in the documentation.
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Without limiting anything contained in the foregoing, this file,
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which is part of C Driver for MySQL (Connector/C), is also subject to the
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Universal FOSS Exception, version 1.0, a copy of which can be found at
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http://oss.oracle.com/licenses/universal-foss-exception.
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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, version 2.0, 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
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/**
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@file mysys/my_open.cc
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*/
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#include "my_config.h"
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#include <errno.h>
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#include <fcntl.h>
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#include <stddef.h>
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#include <sys/types.h>
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#include <iostream>
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#include <thread>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include "my_dbug.h"
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#include "my_inttypes.h"
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#include "my_io.h"
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#include "my_sys.h"
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#include "my_thread_local.h"
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#include "mysql/psi/mysql_mutex.h"
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#include "mysql/service_mysql_alloc.h"
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#include "mysys/mysys_priv.h"
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#include "mysys_err.h"
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/**
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Open a file.
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@param filename Fully qualified file name
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@param Flags Read | write
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@param MyFlags Special flags
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@retval File descriptor if successful
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@retval -1 in case of errors
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*/
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File my_open(const char *filename, int Flags, myf MyFlags) {
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DBUG_TRACE;
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File fd = -1;
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#if defined(_WIN32)
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fd = my_win_open(filename, Flags);
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#else
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fd = mysys_priv::RetryOnEintr(
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[&]() { return open(filename, Flags, my_umask); }, -1);
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#endif
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if (fd < 0) {
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set_my_errno(errno);
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DBUG_PRINT("error", ("Got error %d on open", my_errno()));
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if (MyFlags & (MY_FAE | MY_WME)) {
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MyOsError(my_errno(), EE_FILENOTFOUND, MYF(0), filename);
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}
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return fd;
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}
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RegisterFilename(fd, filename, file_info::OpenType::FILE_BY_OPEN);
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return fd;
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}
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/**
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Close a file.
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@param fd File sescriptor
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@param MyFlags Special Flags
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@retval 0 if successful
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@retval -1 in case of errors
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*/
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int my_close(File fd, myf MyFlags) {
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DBUG_TRACE;
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// Save the filename before unregistering, in case we need to report
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// error from close()
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const std::string fname = my_filename(fd);
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// Need to remove file_info entry first to avoid race with another
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// thread reusing this fd after it has been closed.
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file_info::UnregisterFilename(fd);
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int err = -1;
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#ifndef _WIN32
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err = mysys_priv::RetryOnEintr([&fd]() { return close(fd); }, -1);
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#else
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err = my_win_close(fd);
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#endif
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if (err == -1) {
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DBUG_PRINT("error", ("Got error %d on close", err));
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set_my_errno(errno);
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if (MyFlags & (MY_FAE | MY_WME)) {
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MyOsError(my_errno(), EE_BADCLOSE, MYF(0), fname.c_str());
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}
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}
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return err;
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}
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