1a26b28a9b
bug fixes by Kuan-Chung Chiu <buganini at gmail dot com>. Tested by me in production for several days at work.
1085 lines
29 KiB
C
1085 lines
29 KiB
C
/* $FreeBSD$ */
|
|
/* $NetBSD: msdosfs_conv.c,v 1.25 1997/11/17 15:36:40 ws Exp $ */
|
|
|
|
/*-
|
|
* Copyright (C) 1995, 1997 Wolfgang Solfrank.
|
|
* Copyright (C) 1995, 1997 TooLs GmbH.
|
|
* All rights reserved.
|
|
* Original code by Paul Popelka (paulp@uts.amdahl.com) (see below).
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by TooLs GmbH.
|
|
* 4. The name of TooLs GmbH may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
|
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
|
|
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
|
|
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
|
|
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
|
|
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
/*-
|
|
* Written by Paul Popelka (paulp@uts.amdahl.com)
|
|
*
|
|
* You can do anything you want with this software, just don't say you wrote
|
|
* it, and don't remove this notice.
|
|
*
|
|
* This software is provided "as is".
|
|
*
|
|
* The author supplies this software to be publicly redistributed on the
|
|
* understanding that the author is not responsible for the correct
|
|
* functioning of this software in any circumstances and is not liable for
|
|
* any damages caused by this software.
|
|
*
|
|
* October 1992
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/dirent.h>
|
|
#include <sys/iconv.h>
|
|
#include <sys/mount.h>
|
|
|
|
#include <fs/msdosfs/bpb.h>
|
|
#include <fs/msdosfs/direntry.h>
|
|
#include <fs/msdosfs/msdosfsmount.h>
|
|
|
|
extern struct iconv_functions *msdosfs_iconv;
|
|
|
|
static int mbsadjpos(const char **, size_t, size_t, int, int, void *handle);
|
|
static u_char * dos2unixchr(const u_char **, size_t *, int, struct msdosfsmount *);
|
|
static u_int16_t unix2doschr(const u_char **, size_t *, struct msdosfsmount *);
|
|
static u_char * win2unixchr(u_int16_t, struct msdosfsmount *);
|
|
static u_int16_t unix2winchr(const u_char **, size_t *, int, struct msdosfsmount *);
|
|
|
|
/*
|
|
* 0 - character disallowed in long file name.
|
|
* 1 - character should be replaced by '_' in DOS file name,
|
|
* and generation number inserted.
|
|
* 2 - character ('.' and ' ') should be skipped in DOS file name,
|
|
* and generation number inserted.
|
|
*/
|
|
static u_char
|
|
unix2dos[256] = {
|
|
/* iso8859-1 -> cp850 */
|
|
0, 0, 0, 0, 0, 0, 0, 0, /* 00-07 */
|
|
0, 0, 0, 0, 0, 0, 0, 0, /* 08-0f */
|
|
0, 0, 0, 0, 0, 0, 0, 0, /* 10-17 */
|
|
0, 0, 0, 0, 0, 0, 0, 0, /* 18-1f */
|
|
2, 0x21, 0, 0x23, 0x24, 0x25, 0x26, 0x27, /* 20-27 */
|
|
0x28, 0x29, 0, 1, 1, 0x2d, 2, 0, /* 28-2f */
|
|
0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 30-37 */
|
|
0x38, 0x39, 0, 1, 0, 1, 0, 0, /* 38-3f */
|
|
0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* 40-47 */
|
|
0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, /* 48-4f */
|
|
0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, /* 50-57 */
|
|
0x58, 0x59, 0x5a, 1, 0, 1, 0x5e, 0x5f, /* 58-5f */
|
|
0x60, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* 60-67 */
|
|
0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, /* 68-6f */
|
|
0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, /* 70-77 */
|
|
0x58, 0x59, 0x5a, 0x7b, 0, 0x7d, 0x7e, 0, /* 78-7f */
|
|
0, 0, 0, 0, 0, 0, 0, 0, /* 80-87 */
|
|
0, 0, 0, 0, 0, 0, 0, 0, /* 88-8f */
|
|
0, 0, 0, 0, 0, 0, 0, 0, /* 90-97 */
|
|
0, 0, 0, 0, 0, 0, 0, 0, /* 98-9f */
|
|
0, 0xad, 0xbd, 0x9c, 0xcf, 0xbe, 0xdd, 0xf5, /* a0-a7 */
|
|
0xf9, 0xb8, 0xa6, 0xae, 0xaa, 0xf0, 0xa9, 0xee, /* a8-af */
|
|
0xf8, 0xf1, 0xfd, 0xfc, 0xef, 0xe6, 0xf4, 0xfa, /* b0-b7 */
|
|
0xf7, 0xfb, 0xa7, 0xaf, 0xac, 0xab, 0xf3, 0xa8, /* b8-bf */
|
|
0xb7, 0xb5, 0xb6, 0xc7, 0x8e, 0x8f, 0x92, 0x80, /* c0-c7 */
|
|
0xd4, 0x90, 0xd2, 0xd3, 0xde, 0xd6, 0xd7, 0xd8, /* c8-cf */
|
|
0xd1, 0xa5, 0xe3, 0xe0, 0xe2, 0xe5, 0x99, 0x9e, /* d0-d7 */
|
|
0x9d, 0xeb, 0xe9, 0xea, 0x9a, 0xed, 0xe8, 0xe1, /* d8-df */
|
|
0xb7, 0xb5, 0xb6, 0xc7, 0x8e, 0x8f, 0x92, 0x80, /* e0-e7 */
|
|
0xd4, 0x90, 0xd2, 0xd3, 0xde, 0xd6, 0xd7, 0xd8, /* e8-ef */
|
|
0xd1, 0xa5, 0xe3, 0xe0, 0xe2, 0xe5, 0x99, 0xf6, /* f0-f7 */
|
|
0x9d, 0xeb, 0xe9, 0xea, 0x9a, 0xed, 0xe8, 0x98, /* f8-ff */
|
|
};
|
|
|
|
static u_char
|
|
dos2unix[256] = {
|
|
/* cp850 -> iso8859-1 */
|
|
0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, /* 00-07 */
|
|
0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, /* 08-0f */
|
|
0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, /* 10-17 */
|
|
0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, /* 18-1f */
|
|
0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, /* 20-27 */
|
|
0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, /* 28-2f */
|
|
0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 30-37 */
|
|
0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, /* 38-3f */
|
|
0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* 40-47 */
|
|
0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, /* 48-4f */
|
|
0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, /* 50-57 */
|
|
0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, /* 58-5f */
|
|
0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 60-67 */
|
|
0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 68-6f */
|
|
0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 70-77 */
|
|
0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, /* 78-7f */
|
|
0xc7, 0xfc, 0xe9, 0xe2, 0xe4, 0xe0, 0xe5, 0xe7, /* 80-87 */
|
|
0xea, 0xeb, 0xe8, 0xef, 0xee, 0xec, 0xc4, 0xc5, /* 88-8f */
|
|
0xc9, 0xe6, 0xc6, 0xf4, 0xf6, 0xf2, 0xfb, 0xf9, /* 90-97 */
|
|
0xff, 0xd6, 0xdc, 0xf8, 0xa3, 0xd8, 0xd7, 0x3f, /* 98-9f */
|
|
0xe1, 0xed, 0xf3, 0xfa, 0xf1, 0xd1, 0xaa, 0xba, /* a0-a7 */
|
|
0xbf, 0xae, 0xac, 0xbd, 0xbc, 0xa1, 0xab, 0xbb, /* a8-af */
|
|
0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0xc1, 0xc2, 0xc0, /* b0-b7 */
|
|
0xa9, 0x3f, 0x3f, 0x3f, 0x3f, 0xa2, 0xa5, 0x3f, /* b8-bf */
|
|
0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0xe3, 0xc3, /* c0-c7 */
|
|
0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0xa4, /* c8-cf */
|
|
0xf0, 0xd0, 0xca, 0xcb, 0xc8, 0x3f, 0xcd, 0xce, /* d0-d7 */
|
|
0xcf, 0x3f, 0x3f, 0x3f, 0x3f, 0xa6, 0xcc, 0x3f, /* d8-df */
|
|
0xd3, 0xdf, 0xd4, 0xd2, 0xf5, 0xd5, 0xb5, 0xfe, /* e0-e7 */
|
|
0xde, 0xda, 0xdb, 0xd9, 0xfd, 0xdd, 0xaf, 0x3f, /* e8-ef */
|
|
0xad, 0xb1, 0x3f, 0xbe, 0xb6, 0xa7, 0xf7, 0xb8, /* f0-f7 */
|
|
0xb0, 0xa8, 0xb7, 0xb9, 0xb3, 0xb2, 0x3f, 0x3f, /* f8-ff */
|
|
};
|
|
|
|
static u_char
|
|
u2l[256] = {
|
|
/* tolower */
|
|
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* 00-07 */
|
|
0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, /* 08-0f */
|
|
0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, /* 10-17 */
|
|
0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, /* 18-1f */
|
|
0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, /* 20-27 */
|
|
0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, /* 28-2f */
|
|
0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 30-37 */
|
|
0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, /* 38-3f */
|
|
0x40, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 40-47 */
|
|
0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 48-4f */
|
|
0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 50-57 */
|
|
0x78, 0x79, 0x7a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, /* 58-5f */
|
|
0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 60-67 */
|
|
0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 68-6f */
|
|
0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 70-77 */
|
|
0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, /* 78-7f */
|
|
0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, /* 80-87 */
|
|
0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, /* 88-8f */
|
|
0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, /* 90-97 */
|
|
0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, /* 98-9f */
|
|
0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, /* a0-a7 */
|
|
0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, /* a8-af */
|
|
0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, /* b0-b7 */
|
|
0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, /* b8-bf */
|
|
0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* c0-c7 */
|
|
0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* c8-cf */
|
|
0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xd7, /* d0-d7 */
|
|
0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xdf, /* d8-df */
|
|
0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* e0-e7 */
|
|
0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* e8-ef */
|
|
0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, /* f0-f7 */
|
|
0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, /* f8-ff */
|
|
};
|
|
|
|
static u_char
|
|
l2u[256] = {
|
|
/* toupper */
|
|
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* 00-07 */
|
|
0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, /* 08-0f */
|
|
0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, /* 10-17 */
|
|
0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, /* 18-1f */
|
|
0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, /* 20-27 */
|
|
0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, /* 28-2f */
|
|
0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 30-37 */
|
|
0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, /* 38-3f */
|
|
0x40, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 40-47 */
|
|
0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 48-4f */
|
|
0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 50-57 */
|
|
0x78, 0x79, 0x7a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, /* 58-5f */
|
|
0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 60-67 */
|
|
0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 68-6f */
|
|
0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 70-77 */
|
|
0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, /* 78-7f */
|
|
0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, /* 80-87 */
|
|
0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, /* 88-8f */
|
|
0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, /* 90-97 */
|
|
0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, /* 98-9f */
|
|
0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, /* a0-a7 */
|
|
0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, /* a8-af */
|
|
0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, /* b0-b7 */
|
|
0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, /* b8-bf */
|
|
0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* c0-c7 */
|
|
0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* c8-cf */
|
|
0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xd7, /* d0-d7 */
|
|
0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xdf, /* d8-df */
|
|
0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* e0-e7 */
|
|
0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* e8-ef */
|
|
0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, /* f0-f7 */
|
|
0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, /* f8-ff */
|
|
};
|
|
|
|
/*
|
|
* DOS filenames are made of 2 parts, the name part and the extension part.
|
|
* The name part is 8 characters long and the extension part is 3
|
|
* characters long. They may contain trailing blanks if the name or
|
|
* extension are not long enough to fill their respective fields.
|
|
*/
|
|
|
|
/*
|
|
* Convert a DOS filename to a unix filename. And, return the number of
|
|
* characters in the resulting unix filename excluding the terminating
|
|
* null.
|
|
*/
|
|
int
|
|
dos2unixfn(dn, un, lower, pmp)
|
|
u_char dn[11];
|
|
u_char *un;
|
|
int lower;
|
|
struct msdosfsmount *pmp;
|
|
{
|
|
size_t i;
|
|
int thislong = 0;
|
|
u_char *c;
|
|
|
|
/*
|
|
* If first char of the filename is SLOT_E5 (0x05), then the real
|
|
* first char of the filename should be 0xe5. But, they couldn't
|
|
* just have a 0xe5 mean 0xe5 because that is used to mean a freed
|
|
* directory slot. Another dos quirk.
|
|
*/
|
|
if (*dn == SLOT_E5)
|
|
*dn = 0xe5;
|
|
|
|
/*
|
|
* Copy the name portion into the unix filename string.
|
|
*/
|
|
for (i = 8; i > 0 && *dn != ' ';) {
|
|
c = dos2unixchr((const u_char **)&dn, &i, lower & LCASE_BASE,
|
|
pmp);
|
|
while (*c != '\0') {
|
|
*un++ = *c++;
|
|
thislong++;
|
|
}
|
|
}
|
|
dn += i;
|
|
|
|
/*
|
|
* Now, if there is an extension then put in a period and copy in
|
|
* the extension.
|
|
*/
|
|
if (*dn != ' ') {
|
|
*un++ = '.';
|
|
thislong++;
|
|
for (i = 3; i > 0 && *dn != ' ';) {
|
|
c = dos2unixchr((const u_char **)&dn, &i,
|
|
lower & LCASE_EXT, pmp);
|
|
while (*c != '\0') {
|
|
*un++ = *c++;
|
|
thislong++;
|
|
}
|
|
}
|
|
}
|
|
*un++ = 0;
|
|
|
|
return (thislong);
|
|
}
|
|
|
|
/*
|
|
* Convert a unix filename to a DOS filename according to Win95 rules.
|
|
* If applicable and gen is not 0, it is inserted into the converted
|
|
* filename as a generation number.
|
|
* Returns
|
|
* 0 if name couldn't be converted
|
|
* 1 if the converted name is the same as the original
|
|
* (no long filename entry necessary for Win95)
|
|
* 2 if conversion was successful
|
|
* 3 if conversion was successful and generation number was inserted
|
|
*/
|
|
int
|
|
unix2dosfn(un, dn, unlen, gen, pmp)
|
|
const u_char *un;
|
|
u_char dn[12];
|
|
size_t unlen;
|
|
u_int gen;
|
|
struct msdosfsmount *pmp;
|
|
{
|
|
ssize_t i, j;
|
|
int l;
|
|
int conv = 1;
|
|
const u_char *cp, *dp, *dp1;
|
|
u_char gentext[6], *wcp;
|
|
u_int16_t c;
|
|
|
|
/*
|
|
* Fill the dos filename string with blanks. These are DOS's pad
|
|
* characters.
|
|
*/
|
|
for (i = 0; i < 11; i++)
|
|
dn[i] = ' ';
|
|
dn[11] = 0;
|
|
|
|
/*
|
|
* The filenames "." and ".." are handled specially, since they
|
|
* don't follow dos filename rules.
|
|
*/
|
|
if (un[0] == '.' && unlen == 1) {
|
|
dn[0] = '.';
|
|
return gen <= 1;
|
|
}
|
|
if (un[0] == '.' && un[1] == '.' && unlen == 2) {
|
|
dn[0] = '.';
|
|
dn[1] = '.';
|
|
return gen <= 1;
|
|
}
|
|
|
|
/*
|
|
* Filenames with only blanks and dots are not allowed!
|
|
*/
|
|
for (cp = un, i = unlen; --i >= 0; cp++)
|
|
if (*cp != ' ' && *cp != '.')
|
|
break;
|
|
if (i < 0)
|
|
return 0;
|
|
|
|
|
|
/*
|
|
* Filenames with some characters are not allowed!
|
|
*/
|
|
for (cp = un, i = unlen; i > 0;)
|
|
if (unix2doschr(&cp, (size_t *)&i, pmp) == 0)
|
|
return 0;
|
|
|
|
/*
|
|
* Now find the extension
|
|
* Note: dot as first char doesn't start extension
|
|
* and trailing dots and blanks are ignored
|
|
* Note(2003/7): It seems recent Windows has
|
|
* defferent rule than this code, that Windows
|
|
* ignores all dots before extension, and use all
|
|
* chars as filename except for dots.
|
|
*/
|
|
dp = dp1 = 0;
|
|
for (cp = un + 1, i = unlen - 1; --i >= 0;) {
|
|
switch (*cp++) {
|
|
case '.':
|
|
if (!dp1)
|
|
dp1 = cp;
|
|
break;
|
|
case ' ':
|
|
break;
|
|
default:
|
|
if (dp1)
|
|
dp = dp1;
|
|
dp1 = 0;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Now convert it (this part is for extension).
|
|
* As Windows XP do, if it's not ascii char,
|
|
* this function should return 2 or 3, so that checkng out Unicode name.
|
|
*/
|
|
if (dp) {
|
|
if (dp1)
|
|
l = dp1 - dp;
|
|
else
|
|
l = unlen - (dp - un);
|
|
for (cp = dp, i = l, j = 8; i > 0 && j < 11; j++) {
|
|
c = unix2doschr(&cp, (size_t *)&i, pmp);
|
|
if (c & 0xff00) {
|
|
dn[j] = c >> 8;
|
|
if (++j < 11) {
|
|
dn[j] = c;
|
|
if (conv != 3)
|
|
conv = 2;
|
|
continue;
|
|
} else {
|
|
conv = 3;
|
|
dn[j-1] = ' ';
|
|
break;
|
|
}
|
|
} else {
|
|
dn[j] = c;
|
|
}
|
|
if (((dn[j] & 0x80) || *(cp - 1) != dn[j]) && conv != 3)
|
|
conv = 2;
|
|
if (dn[j] == 1) {
|
|
conv = 3;
|
|
dn[j] = '_';
|
|
}
|
|
if (dn[j] == 2) {
|
|
conv = 3;
|
|
dn[j--] = ' ';
|
|
}
|
|
}
|
|
if (i > 0)
|
|
conv = 3;
|
|
dp--;
|
|
} else {
|
|
for (dp = cp; *--dp == ' ' || *dp == '.';);
|
|
dp++;
|
|
}
|
|
|
|
/*
|
|
* Now convert the rest of the name
|
|
*/
|
|
for (i = dp - un, j = 0; un < dp && j < 8; j++) {
|
|
c = unix2doschr(&un, &i, pmp);
|
|
if (c & 0xff00) {
|
|
dn[j] = c >> 8;
|
|
if (++j < 8) {
|
|
dn[j] = c;
|
|
if (conv != 3)
|
|
conv = 2;
|
|
continue;
|
|
} else {
|
|
conv = 3;
|
|
dn[j-1] = ' ';
|
|
break;
|
|
}
|
|
} else {
|
|
dn[j] = c;
|
|
}
|
|
if (((dn[j] & 0x80) || *(un - 1) != dn[j]) && conv != 3)
|
|
conv = 2;
|
|
if (dn[j] == 1) {
|
|
conv = 3;
|
|
dn[j] = '_';
|
|
}
|
|
if (dn[j] == 2) {
|
|
conv = 3;
|
|
dn[j--] = ' ';
|
|
}
|
|
}
|
|
if (un < dp)
|
|
conv = 3;
|
|
/*
|
|
* If we didn't have any chars in filename,
|
|
* generate a default
|
|
*/
|
|
if (!j)
|
|
dn[0] = '_';
|
|
|
|
/*
|
|
* If there wasn't any char dropped,
|
|
* there is no place for generation numbers
|
|
*/
|
|
if (conv != 3) {
|
|
if (gen > 1)
|
|
conv = 0;
|
|
goto done;
|
|
}
|
|
|
|
/*
|
|
* Now insert the generation number into the filename part
|
|
*/
|
|
if (gen == 0)
|
|
goto done;
|
|
for (wcp = gentext + sizeof(gentext); wcp > gentext && gen; gen /= 10)
|
|
*--wcp = gen % 10 + '0';
|
|
if (gen) {
|
|
conv = 0;
|
|
goto done;
|
|
}
|
|
for (i = 8; dn[--i] == ' ';);
|
|
i++;
|
|
if (gentext + sizeof(gentext) - wcp + 1 > 8 - i)
|
|
i = 8 - (gentext + sizeof(gentext) - wcp + 1);
|
|
/*
|
|
* Correct posision to where insert the generation number
|
|
*/
|
|
cp = dn;
|
|
i -= mbsadjpos((const char**)&cp, i, unlen, 1, pmp->pm_flags, pmp->pm_d2u);
|
|
|
|
dn[i++] = '~';
|
|
while (wcp < gentext + sizeof(gentext))
|
|
dn[i++] = *wcp++;
|
|
|
|
/*
|
|
* Tail of the filename should be space
|
|
*/
|
|
while (i < 8)
|
|
dn[i++] = ' ';
|
|
conv = 3;
|
|
|
|
done:
|
|
/*
|
|
* The first character cannot be E5,
|
|
* because that means a deleted entry
|
|
*/
|
|
if (dn[0] == 0xe5)
|
|
dn[0] = SLOT_E5;
|
|
|
|
return conv;
|
|
}
|
|
|
|
/*
|
|
* Create a Win95 long name directory entry
|
|
* Note: assumes that the filename is valid,
|
|
* i.e. doesn't consist solely of blanks and dots
|
|
*/
|
|
int
|
|
unix2winfn(un, unlen, wep, cnt, chksum, pmp)
|
|
const u_char *un;
|
|
size_t unlen;
|
|
struct winentry *wep;
|
|
int cnt;
|
|
int chksum;
|
|
struct msdosfsmount *pmp;
|
|
{
|
|
u_int8_t *wcp;
|
|
int i, end;
|
|
u_int16_t code;
|
|
|
|
/*
|
|
* Drop trailing blanks and dots
|
|
*/
|
|
unlen = winLenFixup(un, unlen);
|
|
|
|
/*
|
|
* Cut *un for this slot
|
|
*/
|
|
unlen = mbsadjpos((const char **)&un, unlen, (cnt - 1) * WIN_CHARS, 2,
|
|
pmp->pm_flags, pmp->pm_u2w);
|
|
|
|
/*
|
|
* Initialize winentry to some useful default
|
|
*/
|
|
for (wcp = (u_int8_t *)wep, i = sizeof(*wep); --i >= 0; *wcp++ = 0xff);
|
|
wep->weCnt = cnt;
|
|
wep->weAttributes = ATTR_WIN95;
|
|
wep->weReserved1 = 0;
|
|
wep->weChksum = chksum;
|
|
wep->weReserved2 = 0;
|
|
|
|
/*
|
|
* Now convert the filename parts
|
|
*/
|
|
end = 0;
|
|
for (wcp = wep->wePart1, i = sizeof(wep->wePart1)/2; --i >= 0 && !end;) {
|
|
code = unix2winchr(&un, &unlen, 0, pmp);
|
|
*wcp++ = code;
|
|
*wcp++ = code >> 8;
|
|
if (!code)
|
|
end = WIN_LAST;
|
|
}
|
|
for (wcp = wep->wePart2, i = sizeof(wep->wePart2)/2; --i >= 0 && !end;) {
|
|
code = unix2winchr(&un, &unlen, 0, pmp);
|
|
*wcp++ = code;
|
|
*wcp++ = code >> 8;
|
|
if (!code)
|
|
end = WIN_LAST;
|
|
}
|
|
for (wcp = wep->wePart3, i = sizeof(wep->wePart3)/2; --i >= 0 && !end;) {
|
|
code = unix2winchr(&un, &unlen, 0, pmp);
|
|
*wcp++ = code;
|
|
*wcp++ = code >> 8;
|
|
if (!code)
|
|
end = WIN_LAST;
|
|
}
|
|
if (*un == '\0')
|
|
end = WIN_LAST;
|
|
wep->weCnt |= end;
|
|
return !end;
|
|
}
|
|
|
|
/*
|
|
* Compare our filename to the one in the Win95 entry
|
|
* Returns the checksum or -1 if no match
|
|
*/
|
|
int
|
|
winChkName(nbp, un, unlen, chksum, pmp)
|
|
struct mbnambuf *nbp;
|
|
const u_char *un;
|
|
size_t unlen;
|
|
int chksum;
|
|
struct msdosfsmount *pmp;
|
|
{
|
|
size_t len;
|
|
u_int16_t c1, c2;
|
|
u_char *np;
|
|
struct dirent dirbuf;
|
|
|
|
/*
|
|
* We already have winentry in *nbp.
|
|
*/
|
|
if (!mbnambuf_flush(nbp, &dirbuf) || dirbuf.d_namlen == 0)
|
|
return -1;
|
|
|
|
#ifdef MSDOSFS_DEBUG
|
|
printf("winChkName(): un=%s:%d,d_name=%s:%d\n", un, unlen,
|
|
dirbuf.d_name,
|
|
dirbuf.d_namlen);
|
|
#endif
|
|
|
|
/*
|
|
* Compare the name parts
|
|
*/
|
|
len = dirbuf.d_namlen;
|
|
if (unlen != len)
|
|
return -2;
|
|
|
|
for (np = dirbuf.d_name; unlen > 0 && len > 0;) {
|
|
/*
|
|
* Comparison must be case insensitive, because FAT disallows
|
|
* to look up or create files in case sensitive even when
|
|
* it's a long file name.
|
|
*/
|
|
c1 = unix2winchr((const u_char **)&np, &len, LCASE_BASE, pmp);
|
|
c2 = unix2winchr(&un, &unlen, LCASE_BASE, pmp);
|
|
if (c1 != c2)
|
|
return -2;
|
|
}
|
|
return chksum;
|
|
}
|
|
|
|
/*
|
|
* Convert Win95 filename to dirbuf.
|
|
* Returns the checksum or -1 if impossible
|
|
*/
|
|
int
|
|
win2unixfn(nbp, wep, chksum, pmp)
|
|
struct mbnambuf *nbp;
|
|
struct winentry *wep;
|
|
int chksum;
|
|
struct msdosfsmount *pmp;
|
|
{
|
|
u_char *c;
|
|
u_int8_t *cp;
|
|
u_int8_t *np, name[WIN_CHARS * 3 + 1];
|
|
u_int16_t code;
|
|
int i;
|
|
|
|
if ((wep->weCnt&WIN_CNT) > howmany(WIN_MAXLEN, WIN_CHARS)
|
|
|| !(wep->weCnt&WIN_CNT))
|
|
return -1;
|
|
|
|
/*
|
|
* First compare checksums
|
|
*/
|
|
if (wep->weCnt&WIN_LAST) {
|
|
chksum = wep->weChksum;
|
|
} else if (chksum != wep->weChksum)
|
|
chksum = -1;
|
|
if (chksum == -1)
|
|
return -1;
|
|
|
|
/*
|
|
* Convert the name parts
|
|
*/
|
|
np = name;
|
|
for (cp = wep->wePart1, i = sizeof(wep->wePart1)/2; --i >= 0;) {
|
|
code = (cp[1] << 8) | cp[0];
|
|
switch (code) {
|
|
case 0:
|
|
*np = '\0';
|
|
mbnambuf_write(nbp, name, (wep->weCnt & WIN_CNT) - 1);
|
|
return chksum;
|
|
case '/':
|
|
*np = '\0';
|
|
return -1;
|
|
default:
|
|
c = win2unixchr(code, pmp);
|
|
while (*c != '\0')
|
|
*np++ = *c++;
|
|
break;
|
|
}
|
|
cp += 2;
|
|
}
|
|
for (cp = wep->wePart2, i = sizeof(wep->wePart2)/2; --i >= 0;) {
|
|
code = (cp[1] << 8) | cp[0];
|
|
switch (code) {
|
|
case 0:
|
|
*np = '\0';
|
|
mbnambuf_write(nbp, name, (wep->weCnt & WIN_CNT) - 1);
|
|
return chksum;
|
|
case '/':
|
|
*np = '\0';
|
|
return -1;
|
|
default:
|
|
c = win2unixchr(code, pmp);
|
|
while (*c != '\0')
|
|
*np++ = *c++;
|
|
break;
|
|
}
|
|
cp += 2;
|
|
}
|
|
for (cp = wep->wePart3, i = sizeof(wep->wePart3)/2; --i >= 0;) {
|
|
code = (cp[1] << 8) | cp[0];
|
|
switch (code) {
|
|
case 0:
|
|
*np = '\0';
|
|
mbnambuf_write(nbp, name, (wep->weCnt & WIN_CNT) - 1);
|
|
return chksum;
|
|
case '/':
|
|
*np = '\0';
|
|
return -1;
|
|
default:
|
|
c = win2unixchr(code, pmp);
|
|
while (*c != '\0')
|
|
*np++ = *c++;
|
|
break;
|
|
}
|
|
cp += 2;
|
|
}
|
|
*np = '\0';
|
|
mbnambuf_write(nbp, name, (wep->weCnt & WIN_CNT) - 1);
|
|
return chksum;
|
|
}
|
|
|
|
/*
|
|
* Compute the unrolled checksum of a DOS filename for Win95 LFN use.
|
|
*/
|
|
u_int8_t
|
|
winChksum(u_int8_t *name)
|
|
{
|
|
int i;
|
|
u_int8_t s;
|
|
|
|
for (s = 0, i = 11; --i >= 0; s += *name++)
|
|
s = (s << 7)|(s >> 1);
|
|
return (s);
|
|
}
|
|
|
|
/*
|
|
* Determine the number of slots necessary for Win95 names
|
|
*/
|
|
int
|
|
winSlotCnt(un, unlen, pmp)
|
|
const u_char *un;
|
|
size_t unlen;
|
|
struct msdosfsmount *pmp;
|
|
{
|
|
size_t wlen;
|
|
char wn[WIN_MAXLEN * 2 + 1], *wnp;
|
|
|
|
unlen = winLenFixup(un, unlen);
|
|
|
|
if (pmp->pm_flags & MSDOSFSMNT_KICONV && msdosfs_iconv) {
|
|
wlen = WIN_MAXLEN * 2;
|
|
wnp = wn;
|
|
msdosfs_iconv->conv(pmp->pm_u2w, (const char **)&un, &unlen, &wnp, &wlen);
|
|
if (unlen > 0)
|
|
return 0;
|
|
return howmany(WIN_MAXLEN - wlen/2, WIN_CHARS);
|
|
}
|
|
|
|
if (unlen > WIN_MAXLEN)
|
|
return 0;
|
|
return howmany(unlen, WIN_CHARS);
|
|
}
|
|
|
|
/*
|
|
* Determine the number of bytes neccesary for Win95 names
|
|
*/
|
|
size_t
|
|
winLenFixup(un, unlen)
|
|
const u_char* un;
|
|
size_t unlen;
|
|
{
|
|
for (un += unlen; unlen > 0; unlen--)
|
|
if (*--un != ' ' && *un != '.')
|
|
break;
|
|
return unlen;
|
|
}
|
|
|
|
/*
|
|
* Store an area with multi byte string instr, and reterns left
|
|
* byte of instr and moves pointer forward. The area's size is
|
|
* inlen or outlen.
|
|
*/
|
|
static int
|
|
mbsadjpos(const char **instr, size_t inlen, size_t outlen, int weight, int flag, void *handle)
|
|
{
|
|
char *outp, outstr[outlen * weight + 1];
|
|
|
|
if (flag & MSDOSFSMNT_KICONV && msdosfs_iconv) {
|
|
outp = outstr;
|
|
outlen *= weight;
|
|
msdosfs_iconv->conv(handle, instr, &inlen, &outp, &outlen);
|
|
return (inlen);
|
|
}
|
|
|
|
(*instr) += min(inlen, outlen);
|
|
return (inlen - min(inlen, outlen));
|
|
}
|
|
|
|
/*
|
|
* Convert DOS char to Local char
|
|
*/
|
|
static u_char *
|
|
dos2unixchr(const u_char **instr, size_t *ilen, int lower, struct msdosfsmount *pmp)
|
|
{
|
|
u_char c, *outp, outbuf[5];
|
|
size_t len, olen;
|
|
|
|
outp = outbuf;
|
|
if (pmp->pm_flags & MSDOSFSMNT_KICONV && msdosfs_iconv) {
|
|
olen = len = 4;
|
|
|
|
if (lower & (LCASE_BASE | LCASE_EXT))
|
|
msdosfs_iconv->convchr_case(pmp->pm_d2u, (const char **)instr,
|
|
ilen, (char **)&outp, &olen, KICONV_LOWER);
|
|
else
|
|
msdosfs_iconv->convchr(pmp->pm_d2u, (const char **)instr,
|
|
ilen, (char **)&outp, &olen);
|
|
len -= olen;
|
|
|
|
/*
|
|
* return '?' if failed to convert
|
|
*/
|
|
if (len == 0) {
|
|
(*ilen)--;
|
|
(*instr)++;
|
|
*outp++ = '?';
|
|
}
|
|
} else {
|
|
(*ilen)--;
|
|
c = *(*instr)++;
|
|
c = dos2unix[c];
|
|
if (lower & (LCASE_BASE | LCASE_EXT))
|
|
c = u2l[c];
|
|
*outp++ = c;
|
|
outbuf[1] = '\0';
|
|
}
|
|
|
|
*outp = '\0';
|
|
outp = outbuf;
|
|
return (outp);
|
|
}
|
|
|
|
/*
|
|
* Convert Local char to DOS char
|
|
*/
|
|
static u_int16_t
|
|
unix2doschr(const u_char **instr, size_t *ilen, struct msdosfsmount *pmp)
|
|
{
|
|
u_char c;
|
|
char *up, *outp, unicode[3], outbuf[3];
|
|
u_int16_t wc;
|
|
size_t len, ucslen, unixlen, olen;
|
|
|
|
if (pmp->pm_flags & MSDOSFSMNT_KICONV && msdosfs_iconv) {
|
|
/*
|
|
* to hide an invisible character, using a unicode filter
|
|
*/
|
|
ucslen = 2;
|
|
len = *ilen;
|
|
up = unicode;
|
|
msdosfs_iconv->convchr(pmp->pm_u2w, (const char **)instr,
|
|
ilen, &up, &ucslen);
|
|
unixlen = len - *ilen;
|
|
|
|
/*
|
|
* cannot be converted
|
|
*/
|
|
if (unixlen == 0) {
|
|
(*ilen)--;
|
|
(*instr)++;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* return magic number for ascii char
|
|
*/
|
|
if (unixlen == 1) {
|
|
c = *(*instr -1);
|
|
if (! (c & 0x80)) {
|
|
c = unix2dos[c];
|
|
if (c <= 2)
|
|
return (c);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* now convert using libiconv
|
|
*/
|
|
*instr -= unixlen;
|
|
*ilen = len;
|
|
|
|
olen = len = 2;
|
|
outp = outbuf;
|
|
msdosfs_iconv->convchr_case(pmp->pm_u2d, (const char **)instr,
|
|
ilen, &outp, &olen, KICONV_FROM_UPPER);
|
|
len -= olen;
|
|
|
|
/*
|
|
* cannot be converted, but has unicode char, should return magic number
|
|
*/
|
|
if (len == 0) {
|
|
(*ilen) -= unixlen;
|
|
(*instr) += unixlen;
|
|
return (1);
|
|
}
|
|
|
|
wc = 0;
|
|
while(len--)
|
|
wc |= (*(outp - len - 1) & 0xff) << (len << 3);
|
|
return (wc);
|
|
}
|
|
|
|
(*ilen)--;
|
|
c = *(*instr)++;
|
|
c = l2u[c];
|
|
c = unix2dos[c];
|
|
return ((u_int16_t)c);
|
|
}
|
|
|
|
/*
|
|
* Convert Windows char to Local char
|
|
*/
|
|
static u_char *
|
|
win2unixchr(u_int16_t wc, struct msdosfsmount *pmp)
|
|
{
|
|
u_char *inp, *outp, inbuf[3], outbuf[5];
|
|
size_t ilen, olen, len;
|
|
|
|
outp = outbuf;
|
|
if (pmp->pm_flags & MSDOSFSMNT_KICONV && msdosfs_iconv) {
|
|
inbuf[0] = (u_char)(wc>>8);
|
|
inbuf[1] = (u_char)wc;
|
|
inbuf[2] = '\0';
|
|
|
|
ilen = 2;
|
|
olen = len = 4;
|
|
inp = inbuf;
|
|
msdosfs_iconv->convchr(pmp->pm_w2u, (const char **)&inp, &ilen,
|
|
(char **)&outp, &olen);
|
|
len -= olen;
|
|
|
|
/*
|
|
* return '?' if failed to convert
|
|
*/
|
|
if (len == 0)
|
|
*outp++ = '?';
|
|
} else {
|
|
*outp++ = (wc & 0xff00) ? '?' : (u_char)(wc & 0xff);
|
|
}
|
|
|
|
*outp = '\0';
|
|
outp = outbuf;
|
|
return (outp);
|
|
}
|
|
|
|
/*
|
|
* Convert Local char to Windows char
|
|
*/
|
|
static u_int16_t
|
|
unix2winchr(const u_char **instr, size_t *ilen, int lower, struct msdosfsmount *pmp)
|
|
{
|
|
u_char *outp, outbuf[3];
|
|
u_int16_t wc;
|
|
size_t olen;
|
|
|
|
if (*ilen == 0)
|
|
return (0);
|
|
|
|
if (pmp->pm_flags & MSDOSFSMNT_KICONV && msdosfs_iconv) {
|
|
outp = outbuf;
|
|
olen = 2;
|
|
if (lower & (LCASE_BASE | LCASE_EXT))
|
|
msdosfs_iconv->convchr_case(pmp->pm_u2w, (const char **)instr,
|
|
ilen, (char **)&outp, &olen,
|
|
KICONV_FROM_LOWER);
|
|
else
|
|
msdosfs_iconv->convchr(pmp->pm_u2w, (const char **)instr,
|
|
ilen, (char **)&outp, &olen);
|
|
|
|
/*
|
|
* return '0' if end of filename
|
|
*/
|
|
if (olen == 2)
|
|
return (0);
|
|
|
|
wc = (outbuf[0]<<8) | outbuf[1];
|
|
|
|
return (wc);
|
|
}
|
|
|
|
(*ilen)--;
|
|
wc = (*instr)[0];
|
|
if (lower & (LCASE_BASE | LCASE_EXT))
|
|
wc = u2l[wc];
|
|
(*instr)++;
|
|
return (wc);
|
|
}
|
|
|
|
/*
|
|
* Initialize the temporary concatenation buffer.
|
|
*/
|
|
void
|
|
mbnambuf_init(struct mbnambuf *nbp)
|
|
{
|
|
|
|
nbp->nb_len = 0;
|
|
nbp->nb_last_id = -1;
|
|
nbp->nb_buf[sizeof(nbp->nb_buf) - 1] = '\0';
|
|
}
|
|
|
|
/*
|
|
* Fill out our concatenation buffer with the given substring, at the offset
|
|
* specified by its id. Since this function must be called with ids in
|
|
* descending order, we take advantage of the fact that ASCII substrings are
|
|
* exactly WIN_CHARS in length. For non-ASCII substrings, we shift all
|
|
* previous (i.e. higher id) substrings upwards to make room for this one.
|
|
* This only penalizes portions of substrings that contain more than
|
|
* WIN_CHARS bytes when they are first encountered.
|
|
*/
|
|
void
|
|
mbnambuf_write(struct mbnambuf *nbp, char *name, int id)
|
|
{
|
|
char *slot;
|
|
size_t count, newlen;
|
|
|
|
if (nbp->nb_len != 0 && id != nbp->nb_last_id - 1) {
|
|
printf("msdosfs: non-decreasing id: id %d, last id %d\n",
|
|
id, nbp->nb_last_id);
|
|
return;
|
|
}
|
|
|
|
/* Will store this substring in a WIN_CHARS-aligned slot. */
|
|
slot = &nbp->nb_buf[id * WIN_CHARS];
|
|
count = strlen(name);
|
|
newlen = nbp->nb_len + count;
|
|
if (newlen > WIN_MAXLEN || newlen > MAXNAMLEN) {
|
|
printf("msdosfs: file name length %zu too large\n", newlen);
|
|
return;
|
|
}
|
|
|
|
/* Shift suffix upwards by the amount length exceeds WIN_CHARS. */
|
|
if (count > WIN_CHARS && nbp->nb_len != 0)
|
|
bcopy(slot + WIN_CHARS, slot + count, nbp->nb_len);
|
|
|
|
/* Copy in the substring to its slot and update length so far. */
|
|
bcopy(name, slot, count);
|
|
nbp->nb_len = newlen;
|
|
nbp->nb_last_id = id;
|
|
}
|
|
|
|
/*
|
|
* Take the completed string and use it to setup the struct dirent.
|
|
* Be sure to always nul-terminate the d_name and then copy the string
|
|
* from our buffer. Note that this function assumes the full string has
|
|
* been reassembled in the buffer. If it's called before all substrings
|
|
* have been written via mbnambuf_write(), the result will be incorrect.
|
|
*/
|
|
char *
|
|
mbnambuf_flush(struct mbnambuf *nbp, struct dirent *dp)
|
|
{
|
|
|
|
if (nbp->nb_len > sizeof(dp->d_name) - 1) {
|
|
mbnambuf_init(nbp);
|
|
return (NULL);
|
|
}
|
|
bcopy(&nbp->nb_buf[0], dp->d_name, nbp->nb_len);
|
|
dp->d_name[nbp->nb_len] = '\0';
|
|
dp->d_namlen = nbp->nb_len;
|
|
|
|
mbnambuf_init(nbp);
|
|
return (dp->d_name);
|
|
}
|