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winfs.c revision 1.3 
      1 /*	$NetBSD: winfs.c,v 1.3 2006/01/25 18:28:26 christos 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(path, f)
     54 	char           *path;
     55 	struct open_file *f;
     56 {
     57 	TCHAR *wpath = (TCHAR*)path;
     58 	struct winfs *fsdata;
     59 
     60 	fsdata = (struct winfs *)alloc(sizeof(*fsdata));
     61 	if (!fsdata) {
     62 		return (ENOMEM);
     63 	}
     64 
     65 	win_printf(TEXT("open(%s)\n"), wpath);
     66 	fsdata->hDevice = CreateFile(wpath, GENERIC_READ, 0, NULL,
     67 				    OPEN_EXISTING, 0, NULL);
     68 	if (fsdata->hDevice == INVALID_HANDLE_VALUE) {
     69 		win_printf(TEXT("can't open %s.\n"), wpath);
     70 		dealloc(fsdata, sizeof(*fsdata));
     71 		return (EIO);	/* XXX, We shuld check GetLastError(). */
     72 	}
     73 
     74 	f->f_fsdata = (void *)fsdata;
     75 
     76 	return (0);
     77 }
     78 
     79 
     80 int
     81 win_close(f)
     82 	struct open_file *f;
     83 {
     84 	struct winfs *fsdata = (struct winfs *) f->f_fsdata;
     85 
     86 	if (fsdata->hDevice != INVALID_HANDLE_VALUE) {
     87 		CloseHandle(fsdata->hDevice);
     88 	}
     89 	dealloc(fsdata, sizeof(*fsdata));
     90 
     91 	return (0);
     92 }
     93 
     94 
     95 int
     96 win_read(f, addr, size, resid)
     97 	struct open_file *f;
     98 	void           *addr;
     99 	size_t         size;
    100 	size_t         *resid;	/* out */
    101 {
    102 	struct winfs *fsdata = (struct winfs *) f->f_fsdata;
    103 	DWORD read_len;
    104 
    105 	while (size > 0) {
    106 		if (!ReadFile(fsdata->hDevice,
    107 			      (u_char*)addr, size,
    108 			      &read_len, NULL)) {
    109 			win_printf(TEXT("ReadFile() failed.\n"));
    110 		}
    111 
    112 		if (read_len == 0)
    113 			break;	/* EOF */
    114 
    115 		(unsigned long)addr += read_len;
    116 		size -= read_len;
    117 	}
    118 
    119 	if (resid)
    120 		*resid = size;
    121 	return (0);
    122 }
    123 
    124 int
    125 win_write(f, start, size, resid)
    126 	struct open_file *f;
    127 	void           *start;
    128 	size_t          size;
    129 	size_t         *resid;	/* out */
    130 {
    131 	return (EROFS);	/* XXX */
    132 }
    133 
    134 
    135 int
    136 win_stat(f, sb)
    137 	struct open_file *f;
    138 	struct stat    *sb;
    139 {
    140 	sb->st_mode = 0444;
    141 	sb->st_nlink = 1;
    142 	sb->st_uid = 0;
    143 	sb->st_gid = 0;
    144 	sb->st_size = -1;
    145 	return (0);
    146 }
    147 
    148 off_t
    149 win_seek(f, offset, whence)
    150 	struct open_file *f;
    151 	off_t           offset;
    152 	int             whence;
    153 {
    154 	struct winfs *fsdata = (struct winfs *) f->f_fsdata;
    155 	DWORD dwPointer;
    156 	int winwhence;
    157 
    158 	switch (whence) {
    159 	case SEEK_SET:
    160 		winwhence = FILE_BEGIN;
    161 		break;
    162 	case SEEK_CUR:
    163 		winwhence = FILE_CURRENT;
    164 		break;
    165 	case SEEK_END:
    166 		winwhence = FILE_END;
    167 		break;
    168 	default:
    169 		errno = EOFFSET;
    170 		return (-1);
    171 	}
    172 
    173 	dwPointer = SetFilePointer(fsdata->hDevice, offset, NULL, winwhence);
    174 	if (dwPointer == 0xffffffff) {
    175 		errno = EINVAL;	/* XXX, We shuld check GetLastError(). */
    176 		return (-1);
    177 	}
    178 
    179 	return (0);
    180 }
    181