1 /*
2 +----------------------------------------------------------------------+
3 | PHP Version 7 |
4 +----------------------------------------------------------------------+
5 | Copyright (c) 1997-2018 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
19 /* $Id$ */
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 #ifndef HAVE_FLOCK
flock(int fd,int operation)37 PHPAPI int flock(int fd, int operation)
38 {
39 return php_flock(fd, operation);
40 }
41 #endif /* !defined(HAVE_FLOCK) */
42
php_flock(int fd,int operation)43 PHPAPI int php_flock(int fd, int operation)
44 #if HAVE_STRUCT_FLOCK /* {{{ */
45 {
46 struct flock flck;
47 int ret;
48
49 flck.l_start = flck.l_len = 0;
50 flck.l_whence = SEEK_SET;
51
52 if (operation & LOCK_SH)
53 flck.l_type = F_RDLCK;
54 else if (operation & LOCK_EX)
55 flck.l_type = F_WRLCK;
56 else if (operation & LOCK_UN)
57 flck.l_type = F_UNLCK;
58 else {
59 errno = EINVAL;
60 return -1;
61 }
62
63 ret = fcntl(fd, operation & LOCK_NB ? F_SETLK : F_SETLKW, &flck);
64
65 if (operation & LOCK_NB && ret == -1 &&
66 (errno == EACCES || errno == EAGAIN))
67 errno = EWOULDBLOCK;
68
69 if (ret != -1) ret = 0;
70
71 return ret;
72 }
73 /* }}} */
74 #elif defined(PHP_WIN32) /* {{{ */
75 /*
76 * Program: Unix compatibility routines
77 *
78 * Author: Mark Crispin
79 * Networks and Distributed Computing
80 * Computing & Communications
81 * University of Washington
82 * Administration Building, AG-44
83 * Seattle, WA 98195
84 * Internet: MRC@CAC.Washington.EDU
85 *
86 * Date: 14 September 1996
87 * Last Edited: 14 August 1997
88 *
89 * Copyright 1997 by the University of Washington
90 *
91 * Permission to use, copy, modify, and distribute this software and its
92 * documentation for any purpose and without fee is hereby granted, provided
93 * that the above copyright notice appears in all copies and that both the
94 * above copyright notice and this permission notice appear in supporting
95 * documentation, and that the name of the University of Washington not be
96 * used in advertising or publicity pertaining to distribution of the software
97 * without specific, written prior permission. This software is made available
98 * "as is", and
99 * THE UNIVERSITY OF WASHINGTON DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED,
100 * WITH REGARD TO THIS SOFTWARE, INCLUDING WITHOUT LIMITATION ALL IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, AND IN
101 * NO EVENT SHALL THE UNIVERSITY OF WASHINGTON BE LIABLE FOR ANY SPECIAL,
102 * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
103 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, TORT
104 * (INCLUDING NEGLIGENCE) OR STRICT LIABILITY, ARISING OUT OF OR IN CONNECTION
105 * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
106 *
107 */
108 /* DEDICATION
109
110 * This file is dedicated to my dog, Unix, also known as Yun-chan and
111 * Unix J. Terwilliker Jehosophat Aloysius Monstrosity Animal Beast. Unix
112 * passed away at the age of 11 1/2 on September 14, 1996, 12:18 PM PDT, after
113 * a two-month bout with cirrhosis of the liver.
114 *
115 * He was a dear friend, and I miss him terribly.
116 *
117 * Lift a leg, Yunie. Luv ya forever!!!!
118 */
119 {
120 HANDLE hdl = (HANDLE) _get_osfhandle(fd);
121 DWORD low = 1, high = 0;
122 OVERLAPPED offset =
123 {0, 0, 0, 0, NULL};
124 DWORD err;
125
126 if (INVALID_HANDLE_VALUE == hdl) {
127 _set_errno(EBADF);
128 return -1; /* error in file descriptor */
129 }
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
150 err = GetLastError();
151 if (ERROR_LOCK_VIOLATION == err || ERROR_SHARING_VIOLATION == err) {
152 _set_errno(EWOULDBLOCK);
153 } else {
154 _set_errno(EINVAL); /* bad call */
155 }
156
157 return -1;
158 }
159 /* }}} */
160 #else
161 #warning no proper flock support for your site
162 {
163 errno = 0;
164 return 0;
165 }
166 #endif
167
168 #ifndef PHP_WIN32
169 #if !(HAVE_INET_ATON)
170 /* {{{ inet_aton
171 * Check whether "cp" is a valid ascii representation
172 * of an Internet address and convert to a binary address.
173 * Returns 1 if the address is valid, 0 if not.
174 * This replaces inet_addr, the return value from which
175 * cannot distinguish between failure and a local broadcast address.
176 */
inet_aton(const char * cp,struct in_addr * ap)177 int inet_aton(const char *cp, struct in_addr *ap)
178 {
179 int dots = 0;
180 register unsigned long acc = 0, addr = 0;
181
182 do {
183 register char cc = *cp;
184
185 switch (cc) {
186 case '0':
187 case '1':
188 case '2':
189 case '3':
190 case '4':
191 case '5':
192 case '6':
193 case '7':
194 case '8':
195 case '9':
196 acc = acc * 10 + (cc - '0');
197 break;
198
199 case '.':
200 if (++dots > 3) {
201 return 0;
202 }
203 /* Fall through */
204
205 case '\0':
206 if (acc > 255) {
207 return 0;
208 }
209 addr = addr << 8 | acc;
210 acc = 0;
211 break;
212
213 default:
214 return 0;
215 }
216 } while (*cp++) ;
217
218 /* Normalize the address */
219 if (dots < 3) {
220 addr <<= 8 * (3 - dots) ;
221 }
222
223 /* Store it if requested */
224 if (ap) {
225 ap->s_addr = htonl(addr);
226 }
227
228 return 1;
229 }
230 /* }}} */
231 #endif /* !HAVE_INET_ATON */
232 #endif
233
234 /*
235 * Local variables:
236 * tab-width: 4
237 * c-basic-offset: 4
238 * End:
239 * vim600: sw=4 ts=4 fdm=marker
240 * vim<600: sw=4 ts=4
241 */
242
