Annotation of embedaddon/php/ext/standard/flock_compat.c, revision 1.1.1.2
1.1 misho 1: /*
2: +----------------------------------------------------------------------+
3: | PHP Version 5 |
4: +----------------------------------------------------------------------+
5: | Copyright (c) 1997-2012 The PHP Group |
6: +----------------------------------------------------------------------+
7: | This source file is subject to version 3.01 of the PHP license, |
8: | that is bundled with this package in the file LICENSE, and is |
9: | available through the world-wide-web at the following url: |
10: | http://www.php.net/license/3_01.txt |
11: | If you did not receive a copy of the PHP license and are unable to |
12: | obtain it through the world-wide-web, please send a note to |
13: | license@php.net so we can mail you a copy immediately. |
14: +----------------------------------------------------------------------+
15: | Author: Sascha Schumann <sascha@schumann.cx> |
16: +----------------------------------------------------------------------+
17: */
18:
1.1.1.2 ! misho 19: /* $Id$ */
1.1 misho 20:
21: #include "php.h"
22: #include <errno.h>
23: #include "ext/standard/flock_compat.h"
24:
25: #if HAVE_STRUCT_FLOCK
26: #include <unistd.h>
27: #include <fcntl.h>
28: #include <sys/file.h>
29: #endif
30:
31: #ifdef PHP_WIN32
32: #include <io.h>
33: #include "config.w32.h"
34: #endif
35:
36: #ifdef NETWARE
37: #include <netinet/in.h>
38: #endif
39:
40: #ifndef HAVE_FLOCK
41: PHPAPI int flock(int fd, int operation)
42: {
43: return php_flock(fd, operation);
44: }
45: #endif /* !defined(HAVE_FLOCK) */
46:
47: PHPAPI int php_flock(int fd, int operation)
48: #if HAVE_STRUCT_FLOCK /* {{{ */
49: {
50: struct flock flck;
51: int ret;
52:
53: flck.l_start = flck.l_len = 0;
54: flck.l_whence = SEEK_SET;
55:
56: if (operation & LOCK_SH)
57: flck.l_type = F_RDLCK;
58: else if (operation & LOCK_EX)
59: flck.l_type = F_WRLCK;
60: else if (operation & LOCK_UN)
61: flck.l_type = F_UNLCK;
62: else {
63: errno = EINVAL;
64: return -1;
65: }
66:
67: ret = fcntl(fd, operation & LOCK_NB ? F_SETLK : F_SETLKW, &flck);
68:
69: if (operation & LOCK_NB && ret == -1 &&
70: (errno == EACCES || errno == EAGAIN))
71: errno = EWOULDBLOCK;
72:
73: if (ret != -1) ret = 0;
74:
75: return ret;
76: }
77: /* }}} */
78: #elif defined(PHP_WIN32) /* {{{ */
79: /*
80: * Program: Unix compatibility routines
81: *
82: * Author: Mark Crispin
83: * Networks and Distributed Computing
84: * Computing & Communications
85: * University of Washington
86: * Administration Building, AG-44
87: * Seattle, WA 98195
88: * Internet: MRC@CAC.Washington.EDU
89: *
90: * Date: 14 September 1996
91: * Last Edited: 14 August 1997
92: *
93: * Copyright 1997 by the University of Washington
94: *
95: * Permission to use, copy, modify, and distribute this software and its
96: * documentation for any purpose and without fee is hereby granted, provided
97: * that the above copyright notice appears in all copies and that both the
98: * above copyright notice and this permission notice appear in supporting
99: * documentation, and that the name of the University of Washington not be
100: * used in advertising or publicity pertaining to distribution of the software
101: * without specific, written prior permission. This software is made available
102: * "as is", and
103: * THE UNIVERSITY OF WASHINGTON DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED,
104: * WITH REGARD TO THIS SOFTWARE, INCLUDING WITHOUT LIMITATION ALL IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, AND IN
105: * NO EVENT SHALL THE UNIVERSITY OF WASHINGTON BE LIABLE FOR ANY SPECIAL,
106: * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
107: * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, TORT
108: * (INCLUDING NEGLIGENCE) OR STRICT LIABILITY, ARISING OUT OF OR IN CONNECTION
109: * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
110: *
111: */
112: /* DEDICATION
113:
114: * This file is dedicated to my dog, Unix, also known as Yun-chan and
115: * Unix J. Terwilliker Jehosophat Aloysius Monstrosity Animal Beast. Unix
116: * passed away at the age of 11 1/2 on September 14, 1996, 12:18 PM PDT, after
117: * a two-month bout with cirrhosis of the liver.
118: *
119: * He was a dear friend, and I miss him terribly.
120: *
121: * Lift a leg, Yunie. Luv ya forever!!!!
122: */
123: {
124: HANDLE hdl = (HANDLE) _get_osfhandle(fd);
125: DWORD low = 1, high = 0;
126: OVERLAPPED offset =
127: {0, 0, 0, 0, NULL};
128: if (hdl < 0)
129: return -1; /* error in file descriptor */
130: /* bug for bug compatible with Unix */
131: UnlockFileEx(hdl, 0, low, high, &offset);
132: switch (operation & ~LOCK_NB) { /* translate to LockFileEx() op */
133: case LOCK_EX: /* exclusive */
134: if (LockFileEx(hdl, LOCKFILE_EXCLUSIVE_LOCK +
135: ((operation & LOCK_NB) ? LOCKFILE_FAIL_IMMEDIATELY : 0),
136: 0, low, high, &offset))
137: return 0;
138: break;
139: case LOCK_SH: /* shared */
140: if (LockFileEx(hdl, ((operation & LOCK_NB) ? LOCKFILE_FAIL_IMMEDIATELY : 0),
141: 0, low, high, &offset))
142: return 0;
143: break;
144: case LOCK_UN: /* unlock */
145: return 0; /* always succeeds */
146: default: /* default */
147: break;
148: }
149: /* Under Win32 MT library, errno is not a variable but a function call,
150: * which cannot be assigned to.
151: */
152: #if !defined(PHP_WIN32)
153: errno = EINVAL; /* bad call */
154: #endif
155: return -1;
156: }
157: /* }}} */
158: #else
159: #warning no proper flock support for your site
160: {
161: errno = 0;
162: return 0;
163: }
164: #endif
165:
166: #ifndef PHP_WIN32
167: #if !(HAVE_INET_ATON)
168: /* {{{ inet_aton
169: * Check whether "cp" is a valid ascii representation
170: * of an Internet address and convert to a binary address.
171: * Returns 1 if the address is valid, 0 if not.
172: * This replaces inet_addr, the return value from which
173: * cannot distinguish between failure and a local broadcast address.
174: */
175: int inet_aton(const char *cp, struct in_addr *ap)
176: {
177: int dots = 0;
178: register unsigned long acc = 0, addr = 0;
179:
180: do {
181: register char cc = *cp;
182:
183: switch (cc) {
184: case '0':
185: case '1':
186: case '2':
187: case '3':
188: case '4':
189: case '5':
190: case '6':
191: case '7':
192: case '8':
193: case '9':
194: acc = acc * 10 + (cc - '0');
195: break;
196:
197: case '.':
198: if (++dots > 3) {
199: return 0;
200: }
201: /* Fall through */
202:
203: case '\0':
204: if (acc > 255) {
205: return 0;
206: }
207: addr = addr << 8 | acc;
208: acc = 0;
209: break;
210:
211: default:
212: return 0;
213: }
214: } while (*cp++) ;
215:
216: /* Normalize the address */
217: if (dots < 3) {
218: addr <<= 8 * (3 - dots) ;
219: }
220:
221: /* Store it if requested */
222: if (ap) {
223: ap->s_addr = htonl(addr);
224: }
225:
226: return 1;
227: }
228: /* }}} */
229: #endif /* !HAVE_INET_ATON */
230: #endif
231:
232: /*
233: * Local variables:
234: * tab-width: 4
235: * c-basic-offset: 4
236: * End:
237: * vim600: sw=4 ts=4 fdm=marker
238: * vim<600: sw=4 ts=4
239: */
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