ftok.c

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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: Anatol Belski <ab@php.net>                                   |
   +----------------------------------------------------------------------+
 */
 
#include "php.h"
#include "ipc.h"
 
#include <windows.h>
#include <sys/stat.h>
 
#include "ioutil.h"
 
PHP_WIN32_IPC_API key_t
ftok(const char *pathname, int proj_id)
{/*{{{*/
    HANDLE fh;
    struct _stat st;
    BY_HANDLE_FILE_INFORMATION bhfi;
    key_t ret;
    PHP_WIN32_IOUTIL_INIT_W(pathname)
 
    if (!pathw) {
        return (key_t)-1;
    }
 
    if (_wstat(pathw, &st) < 0) {
        PHP_WIN32_IOUTIL_CLEANUP_W()
        return (key_t)-1;
    }
 
    if ((fh = CreateFileW(pathw, FILE_GENERIC_READ, PHP_WIN32_IOUTIL_DEFAULT_SHARE_MODE, 0, OPEN_EXISTING, 0, 0)) == INVALID_HANDLE_VALUE) {
        PHP_WIN32_IOUTIL_CLEANUP_W()
        return (key_t)-1;
    }
 
    if (!GetFileInformationByHandle(fh, &bhfi)) {
        PHP_WIN32_IOUTIL_CLEANUP_W()
        CloseHandle(fh);
        return (key_t)-1;
    }
 
    ret = (key_t) ((proj_id & 0xff) << 24 | (st.st_dev & 0xff) << 16 | (bhfi.nFileIndexLow & 0xffff));
 
    CloseHandle(fh);
    PHP_WIN32_IOUTIL_CLEANUP_W()
 
    return ret;
}/*}}}*/