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winfs.c revision 1.4 
      1 /*	$NetBSD: winfs.c,v 1.4 2009/03/14 15:36:07 dsl Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1999 Shin Takemura.
      5  * All rights reserved.
      6  *
      7  * This software is part of the PocketBSD.
      8  *
      9  * Redistribution and use in source and binary forms, with or without
     10  * modification, are permitted provided that the following conditions
     11  * are met:
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  * 2. Redistributions in binary form must reproduce the above copyright
     15  *    notice, this list of conditions and the following disclaimer in the
     16  *    documentation and/or other materials provided with the distribution.
     17  * 3. All advertising materials mentioning features or use of this software
     18  *    must display the following acknowledgement:
     19  *	This product includes software developed by the PocketBSD project
     20  *	and its contributors.
     21  * 4. Neither the name of the project nor the names of its contributors
     22  *    may be used to endorse or promote products derived from this software
     23  *    without specific prior written permission.
     24  *
     25  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     27  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     28  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     29  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     30  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     31  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     32  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     33  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     34  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     35  * SUCH DAMAGE.
     36  *
     37  */
     38 #define STANDALONE_WINDOWS_SIDE
     39 #include <stand.h>
     40 #include <winfs.h>
     41 
     42 #define MAXPATHLEN 1024
     43 
     44 /*
     45  *  file system specific context.
     46  */
     47 struct winfs {
     48 	HANDLE	hDevice;
     49 };
     50 
     51 
     52 int
     53 win_open(char *path, struct open_file *f)
     54 {
     55 	TCHAR *wpath = (TCHAR*)path;
     56 	struct winfs *fsdata;
     57 
     58 	fsdata = (struct winfs *)alloc(sizeof(*fsdata));
     59 	if (!fsdata) {
     60 		return (ENOMEM);
     61 	}
     62 
     63 	win_printf(TEXT("open(%s)\n"), wpath);
     64 	fsdata->hDevice = CreateFile(wpath, GENERIC_READ, 0, NULL,
     65 				    OPEN_EXISTING, 0, NULL);
     66 	if (fsdata->hDevice == INVALID_HANDLE_VALUE) {
     67 		win_printf(TEXT("can't open %s.\n"), wpath);
     68 		dealloc(fsdata, sizeof(*fsdata));
     69 		return (EIO);	/* XXX, We shuld check GetLastError(). */
     70 	}
     71 
     72 	f->f_fsdata = (void *)fsdata;
     73 
     74 	return (0);
     75 }
     76 
     77 
     78 int
     79 win_close(struct open_file *f)
     80 {
     81 	struct winfs *fsdata = (struct winfs *) f->f_fsdata;
     82 
     83 	if (fsdata->hDevice != INVALID_HANDLE_VALUE) {
     84 		CloseHandle(fsdata->hDevice);
     85 	}
     86 	dealloc(fsdata, sizeof(*fsdata));
     87 
     88 	return (0);
     89 }
     90 
     91 
     92 int
     93 win_read(f, addr, size, resid)
     94 	struct open_file *f;
     95 	void           *addr;
     96 	size_t         size;
     97 	size_t         *resid;	/* out */
     98 {
     99 	struct winfs *fsdata = (struct winfs *) f->f_fsdata;
    100 	DWORD read_len;
    101 
    102 	while (size > 0) {
    103 		if (!ReadFile(fsdata->hDevice,
    104 			      (u_char*)addr, size,
    105 			      &read_len, NULL)) {
    106 			win_printf(TEXT("ReadFile() failed.\n"));
    107 		}
    108 
    109 		if (read_len == 0)
    110 			break;	/* EOF */
    111 
    112 		(unsigned long)addr += read_len;
    113 		size -= read_len;
    114 	}
    115 
    116 	if (resid)
    117 		*resid = size;
    118 	return (0);
    119 }
    120 
    121 int
    122 win_write(f, start, size, resid)
    123 	struct open_file *f;
    124 	void           *start;
    125 	size_t          size;
    126 	size_t         *resid;	/* out */
    127 {
    128 	return (EROFS);	/* XXX */
    129 }
    130 
    131 
    132 int
    133 win_stat(struct open_file *f, struct stat *sb)
    134 {
    135 	sb->st_mode = 0444;
    136 	sb->st_nlink = 1;
    137 	sb->st_uid = 0;
    138 	sb->st_gid = 0;
    139 	sb->st_size = -1;
    140 	return (0);
    141 }
    142 
    143 off_t
    144 win_seek(struct open_file *f, off_t offset, int whence)
    145 {
    146 	struct winfs *fsdata = (struct winfs *) f->f_fsdata;
    147 	DWORD dwPointer;
    148 	int winwhence;
    149 
    150 	switch (whence) {
    151 	case SEEK_SET:
    152 		winwhence = FILE_BEGIN;
    153 		break;
    154 	case SEEK_CUR:
    155 		winwhence = FILE_CURRENT;
    156 		break;
    157 	case SEEK_END:
    158 		winwhence = FILE_END;
    159 		break;
    160 	default:
    161 		errno = EOFFSET;
    162 		return (-1);
    163 	}
    164 
    165 	dwPointer = SetFilePointer(fsdata->hDevice, offset, NULL, winwhence);
    166 	if (dwPointer == 0xffffffff) {
    167 		errno = EINVAL;	/* XXX, We shuld check GetLastError(). */
    168 		return (-1);
    169 	}
    170 
    171 	return (0);
    172 }
    173