1 /*
2 * Program: Unix compatibility routines
3 *
4 * Author: Mark Crispin
5 * Networks and Distributed Computing
6 * Computing & Communications
7 * University of Washington
8 * Administration Building, AG-44
9 * Seattle, WA 98195
10 * Internet: MRC@CAC.Washington.EDU
11 *
12 * Date: 14 September 1996
13 * Last Edited: 14 August 1997
14 *
15 * Copyright 1997 by the University of Washington
16 *
17 * Permission to use, copy, modify, and distribute this software and its
18 * documentation for any purpose and without fee is hereby granted, provided
19 * that the above copyright notice appears in all copies and that both the
20 * above copyright notice and this permission notice appear in supporting
21 * documentation, and that the name of the University of Washington not be
22 * used in advertising or publicity pertaining to distribution of the software
23 * without specific, written prior permission. This software is made available
24 * "as is", and
25 * THE UNIVERSITY OF WASHINGTON DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED,
26 * WITH REGARD TO THIS SOFTWARE, INCLUDING WITHOUT LIMITATION ALL IMPLIED
27 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, AND IN
28 * NO EVENT SHALL THE UNIVERSITY OF WASHINGTON BE LIABLE FOR ANY SPECIAL,
29 * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
30 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, TORT
31 * (INCLUDING NEGLIGENCE) OR STRICT LIABILITY, ARISING OUT OF OR IN CONNECTION
32 * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
33 *
34 */
35
36
37 /* DEDICATION
38
39 * This file is dedicated to my dog, Unix, also known as Yun-chan and
40 * Unix J. Terwilliker Jehosophat Aloysius Monstrosity Animal Beast. Unix
41 * passed away at the age of 11 1/2 on September 14, 1996, 12:18 PM PDT, after
42 * a two-month bout with cirrhosis of the liver.
43 *
44 * He was a dear friend, and I miss him terribly.
45 *
46 * Lift a leg, Yunie. Luv ya forever!!!!
47 */
48
49 #include "php.h"
50 #include <windows.h>
51 #include <io.h>
52 #include <errno.h>
53 #include "flock.h"
54
55 PHPAPI int flock(int fd, int op)
56 {
57 HANDLE hdl = (HANDLE) _get_osfhandle(fd);
58 DWORD low = 1, high = 0;
59 OVERLAPPED offset =
60 {0, 0, 0, 0, NULL};
61 if (hdl < 0)
62 return -1; /* error in file descriptor */
63 /* bug for bug compatible with Unix */
64 UnlockFileEx(hdl, 0, low, high, &offset);
65 switch (op & ~LOCK_NB) { /* translate to LockFileEx() op */
66 case LOCK_EX: /* exclusive */
67 if (LockFileEx(hdl, LOCKFILE_EXCLUSIVE_LOCK +
68 ((op & LOCK_NB) ? LOCKFILE_FAIL_IMMEDIATELY : 0),
69 0, low, high, &offset))
70 return 0;
71 break;
72 case LOCK_SH: /* shared */
73 if (LockFileEx(hdl, ((op & LOCK_NB) ? LOCKFILE_FAIL_IMMEDIATELY : 0),
74 0, low, high, &offset))
75 return 0;
76 break;
77 case LOCK_UN: /* unlock */
78 return 0; /* always succeeds */
79 default: /* default */
80 break;
81 }
82 errno = EINVAL; /* bad call */
83 return -1;
84 }