diff options
Diffstat (limited to 'dosfstools/src/lfn.c')
| -rw-r--r-- | dosfstools/src/lfn.c | 62 |
1 files changed, 44 insertions, 18 deletions
diff --git a/dosfstools/src/lfn.c b/dosfstools/src/lfn.c index 736491cb0..2601172ee 100644 --- a/dosfstools/src/lfn.c +++ b/dosfstools/src/lfn.c @@ -1,6 +1,7 @@ /* lfn.c - Functions for handling VFAT long filenames Copyright (C) 1998 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de> + Copyright (C) 2008-2014 Daniel Baumann <mail@daniel-baumann.ch> This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -15,11 +16,12 @@ You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. - On Debian systems, the complete text of the GNU General Public License + The complete text of the GNU General Public License can be found in /usr/share/common-licenses/GPL-3 file. */ #include <stdio.h> +#include <stdint.h> #include <stdlib.h> #include <string.h> #include <limits.h> @@ -27,19 +29,19 @@ #include "common.h" #include "io.h" -#include "dosfsck.h" +#include "fsck.fat.h" #include "lfn.h" #include "file.h" typedef struct { - __u8 id; /* sequence number for slot */ - __u8 name0_4[10]; /* first 5 characters in name */ - __u8 attr; /* attribute byte */ - __u8 reserved; /* always 0 */ - __u8 alias_checksum; /* checksum for 8.3 alias */ - __u8 name5_10[12]; /* 6 more characters in name */ - __u16 start; /* starting cluster number, 0 in long slots */ - __u8 name11_12[4]; /* last 2 characters in name */ + uint8_t id; /* sequence number for slot */ + uint8_t name0_4[10]; /* first 5 characters in name */ + uint8_t attr; /* attribute byte */ + uint8_t reserved; /* always 0 */ + uint8_t alias_checksum; /* checksum for 8.3 alias */ + uint8_t name5_10[12]; /* 6 more characters in name */ + uint16_t start; /* starting cluster number, 0 in long slots */ + uint8_t name11_12[4]; /* last 2 characters in name */ } LFN_ENT; #define LFN_ID_START 0x40 @@ -85,6 +87,22 @@ static unsigned char fat_uni2esc[64] = { (cnv_unicode( lfn_unicode+(lfn_slot*CHARS_PER_LFN*2), \ lfn_parts*CHARS_PER_LFN, 0 )) +#define BYTES_TO_WCHAR(cl,ch) ((wchar_t)((unsigned)(cl) + ((unsigned)(ch) << 8))) +static size_t mbslen(wchar_t x) +{ + wchar_t wstr[] = { x, 0 }; + return wcstombs(NULL, wstr, 0); +} + +static size_t wctombs(char *dest, wchar_t x) +{ + wchar_t wstr[] = { x, 0 }; + size_t size = wcstombs(NULL, wstr, 0); + if (size != (size_t) - 1) + size = wcstombs(dest, wstr, size + 1); + return size; +} + /* This function converts an unicode string to a normal ASCII string, assuming * ISO-8859-1 charset. Characters not in 8859-1 are converted to the same * escape notation as used by the kernel, i.e. the uuencode-like ":xxx" */ @@ -93,10 +111,13 @@ static char *cnv_unicode(const unsigned char *uni, int maxlen, int use_q) const unsigned char *up; unsigned char *out, *cp; int len, val; + size_t x; for (len = 0, up = uni; (up - uni) / 2 < maxlen && (up[0] || up[1]); up += 2) { - if (UNICODE_CONVERTABLE(up[0], up[1])) + if ((x = mbslen(BYTES_TO_WCHAR(up[0], up[1]))) != (size_t) - 1) + len += x; + else if (UNICODE_CONVERTABLE(up[0], up[1])) ++len; else len += 4; @@ -104,7 +125,10 @@ static char *cnv_unicode(const unsigned char *uni, int maxlen, int use_q) cp = out = use_q ? qalloc(&mem_queue, len + 1) : alloc(len + 1); for (up = uni; (up - uni) / 2 < maxlen && (up[0] || up[1]); up += 2) { - if (UNICODE_CONVERTABLE(up[0], up[1])) + if ((x = + wctombs((char *)cp, BYTES_TO_WCHAR(up[0], up[1]))) != (size_t) - 1) + cp += x; + else if (UNICODE_CONVERTABLE(up[0], up[1])) *cp++ = up[0]; else { /* here the same escape notation is used as in the Linux kernel */ @@ -150,7 +174,7 @@ static void clear_lfn_slots(int start, int end) void lfn_fix_checksum(loff_t from, loff_t to, const char *short_name) { int i; - __u8 sum; + uint8_t sum; for (sum = 0, i = 0; i < 11; i++) sum = (((sum & 1) << 7) | ((sum & 0xfe) >> 1)) + short_name[i]; @@ -366,7 +390,7 @@ void lfn_add_slot(DIR_ENT * de, loff_t dir_offset) sizeof(lfn->reserved), &lfn->reserved); } } - if (lfn->start != CT_LE_W(0)) { + if (lfn->start != htole16(0)) { printf("Start cluster field in VFAT long filename slot is not 0 " "(but 0x%04x).\n", lfn->start); if (interactive) @@ -374,7 +398,7 @@ void lfn_add_slot(DIR_ENT * de, loff_t dir_offset) else printf("Auto-setting to 0.\n"); if (!interactive || get_key("12", "?") == '1') { - lfn->start = CT_LE_W(0); + lfn->start = htole16(0); fs_write(dir_offset + offsetof(LFN_ENT, start), sizeof(lfn->start), &lfn->start); } @@ -386,7 +410,7 @@ void lfn_add_slot(DIR_ENT * de, loff_t dir_offset) char *lfn_get(DIR_ENT * de, loff_t * lfn_offset) { char *lfn; - __u8 sum; + uint8_t sum; int i; *lfn_offset = 0; @@ -430,7 +454,7 @@ char *lfn_get(DIR_ENT * de, loff_t * lfn_offset) return NULL; case '3': for (i = 0; i < lfn_parts; ++i) { - __u8 id = (lfn_parts - i) | (i == 0 ? LFN_ID_START : 0); + uint8_t id = (lfn_parts - i) | (i == 0 ? LFN_ID_START : 0); fs_write(lfn_offsets[i] + offsetof(LFN_ENT, id), sizeof(id), &id); } @@ -440,8 +464,10 @@ char *lfn_get(DIR_ENT * de, loff_t * lfn_offset) } } - for (sum = 0, i = 0; i < 11; i++) + for (sum = 0, i = 0; i < 8; i++) sum = (((sum & 1) << 7) | ((sum & 0xfe) >> 1)) + de->name[i]; + for (i = 0; i < 3; i++) + sum = (((sum & 1) << 7) | ((sum & 0xfe) >> 1)) + de->ext[i]; if (sum != lfn_checksum) { /* checksum doesn't match, long name doesn't apply to this alias */ /* Causes: 1) alias renamed */ |