Annotation of embedaddon/php/ext/standard/flock_compat.c, revision 1.1
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:
! 19: /* $Id: flock_compat.c 321634 2012-01-01 13:15:04Z felipe $ */
! 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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