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|
/*
+----------------------------------------------------------------------+
| Copyright (c) The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| https://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Author: Sascha Schumann <sascha@schumann.cx> |
+----------------------------------------------------------------------+
*/
#include "php.h"
#include <errno.h>
#include "ext/standard/flock_compat.h"
#ifndef HAVE_FLOCK
PHPAPI int flock(int fd, int operation)
{
return php_flock(fd, operation);
}
#endif /* !defined(HAVE_FLOCK) */
PHPAPI int php_flock(int fd, int operation)
#ifdef HAVE_STRUCT_FLOCK /* {{{ */
{
struct flock flck;
int ret;
flck.l_start = flck.l_len = 0;
flck.l_whence = SEEK_SET;
if (operation & LOCK_SH)
flck.l_type = F_RDLCK;
else if (operation & LOCK_EX)
flck.l_type = F_WRLCK;
else if (operation & LOCK_UN)
flck.l_type = F_UNLCK;
else {
errno = EINVAL;
return -1;
}
ret = fcntl(fd, operation & LOCK_NB ? F_SETLK : F_SETLKW, &flck);
if ((operation & LOCK_NB) && ret == -1 &&
(errno == EACCES || errno == EAGAIN))
errno = EWOULDBLOCK;
if (ret != -1) ret = 0;
return ret;
}
/* }}} */
#elif defined(PHP_WIN32) /* {{{ */
/*
* Program: Unix compatibility routines
*
* Author: Mark Crispin
* Networks and Distributed Computing
* Computing & Communications
* University of Washington
* Administration Building, AG-44
* Seattle, WA 98195
* Internet: MRC@CAC.Washington.EDU
*
* Date: 14 September 1996
* Last Edited: 14 August 1997
*
* Copyright 1997 by the University of Washington
*
* Permission to use, copy, modify, and distribute this software and its
* documentation for any purpose and without fee is hereby granted, provided
* that the above copyright notice appears in all copies and that both the
* above copyright notice and this permission notice appear in supporting
* documentation, and that the name of the University of Washington not be
* used in advertising or publicity pertaining to distribution of the software
* without specific, written prior permission. This software is made available
* "as is", and
* THE UNIVERSITY OF WASHINGTON DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED,
* WITH REGARD TO THIS SOFTWARE, INCLUDING WITHOUT LIMITATION ALL IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, AND IN
* NO EVENT SHALL THE UNIVERSITY OF WASHINGTON BE LIABLE FOR ANY SPECIAL,
* INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, TORT
* (INCLUDING NEGLIGENCE) OR STRICT LIABILITY, ARISING OUT OF OR IN CONNECTION
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/
/* DEDICATION
* This file is dedicated to my dog, Unix, also known as Yun-chan and
* Unix J. Terwilliker Jehosophat Aloysius Monstrosity Animal Beast. Unix
* passed away at the age of 11 1/2 on September 14, 1996, 12:18 PM PDT, after
* a two-month bout with cirrhosis of the liver.
*
* He was a dear friend, and I miss him terribly.
*
* Lift a leg, Yunie. Luv ya forever!!!!
*/
{
HANDLE hdl = (HANDLE) _get_osfhandle(fd);
DWORD low = 0xFFFFFFFF, high = 0xFFFFFFFF;
OVERLAPPED offset =
{0, 0, 0, 0, NULL};
DWORD err;
if (INVALID_HANDLE_VALUE == hdl) {
_set_errno(EBADF);
return -1; /* error in file descriptor */
}
/* bug for bug compatible with Unix */
UnlockFileEx(hdl, 0, low, high, &offset);
switch (operation & ~LOCK_NB) { /* translate to LockFileEx() op */
case LOCK_EX: /* exclusive */
if (LockFileEx(hdl, LOCKFILE_EXCLUSIVE_LOCK +
((operation & LOCK_NB) ? LOCKFILE_FAIL_IMMEDIATELY : 0),
0, low, high, &offset))
return 0;
break;
case LOCK_SH: /* shared */
if (LockFileEx(hdl, ((operation & LOCK_NB) ? LOCKFILE_FAIL_IMMEDIATELY : 0),
0, low, high, &offset))
return 0;
break;
case LOCK_UN: /* unlock */
return 0; /* always succeeds */
default: /* default */
break;
}
err = GetLastError();
if (ERROR_LOCK_VIOLATION == err || ERROR_SHARING_VIOLATION == err) {
_set_errno(EWOULDBLOCK);
} else {
_set_errno(EINVAL); /* bad call */
}
return -1;
}
/* }}} */
#else
#warning no proper flock support for your site
{
errno = 0;
return 0;
}
#endif
|
