28 Jul
2005
28 Jul
'05
2:37 a.m.
added port of dosfsck. Does not work yet as I cannot figure how to open
the device. Win32 file access code is included ported from mkdosfs.c
Added: trunk/rosapps/sysutils/dosfsck/
Added: trunk/rosapps/sysutils/dosfsck/.cvsignore
Added: trunk/rosapps/sysutils/dosfsck/CHANGES
Added: trunk/rosapps/sysutils/dosfsck/COPYING
Added: trunk/rosapps/sysutils/dosfsck/Makefile
Added: trunk/rosapps/sysutils/dosfsck/README
Added: trunk/rosapps/sysutils/dosfsck/boot.c
Added: trunk/rosapps/sysutils/dosfsck/boot.h
Added: trunk/rosapps/sysutils/dosfsck/byteorder.h
Added: trunk/rosapps/sysutils/dosfsck/byteswap.h
Added: trunk/rosapps/sysutils/dosfsck/byteswap1.h
Added: trunk/rosapps/sysutils/dosfsck/check.c
Added: trunk/rosapps/sysutils/dosfsck/check.h
Added: trunk/rosapps/sysutils/dosfsck/common.c
Added: trunk/rosapps/sysutils/dosfsck/common.h
Added: trunk/rosapps/sysutils/dosfsck/compiler.h
Added: trunk/rosapps/sysutils/dosfsck/dosfsck.8
Added: trunk/rosapps/sysutils/dosfsck/dosfsck.c
Added: trunk/rosapps/sysutils/dosfsck/dosfsck.h
Added: trunk/rosapps/sysutils/dosfsck/fat.c
Added: trunk/rosapps/sysutils/dosfsck/fat.h
Added: trunk/rosapps/sysutils/dosfsck/file.c
Added: trunk/rosapps/sysutils/dosfsck/file.h
Added: trunk/rosapps/sysutils/dosfsck/generic.h
Added: trunk/rosapps/sysutils/dosfsck/io.c
Added: trunk/rosapps/sysutils/dosfsck/io.h
Added: trunk/rosapps/sysutils/dosfsck/lfn.c
Added: trunk/rosapps/sysutils/dosfsck/lfn.h
Added: trunk/rosapps/sysutils/dosfsck/little_endian.h
Added: trunk/rosapps/sysutils/dosfsck/mkdosfs.c
Added: trunk/rosapps/sysutils/dosfsck/msdos_fs.h
Added: trunk/rosapps/sysutils/dosfsck/swab.h
Added: trunk/rosapps/sysutils/dosfsck/types.h.bak
Added: trunk/rosapps/sysutils/dosfsck/version.h
Added: trunk/rosapps/sysutils/dosfsck/vfat.h
_____
Added: trunk/rosapps/sysutils/dosfsck/.cvsignore
--- trunk/rosapps/sysutils/dosfsck/.cvsignore 2005-07-27 23:11:38 UTC
(rev 16823)
+++ trunk/rosapps/sysutils/dosfsck/.cvsignore 2005-07-28 02:37:42 UTC
(rev 16824)
@@ -0,0 +1 @@
+dosfsck
_____
Added: trunk/rosapps/sysutils/dosfsck/CHANGES
--- trunk/rosapps/sysutils/dosfsck/CHANGES 2005-07-27 23:11:38 UTC
(rev 16823)
+++ trunk/rosapps/sysutils/dosfsck/CHANGES 2005-07-28 02:37:42 UTC
(rev 16824)
@@ -0,0 +1,10 @@
+Changes from version 0 to 1
+===========================
+
+ - fixed an off-by-two error in check.c:check_file
+ - fixed marking clusters bad in fat.c:set_fat
+ - fat.c:reclaim_free was also reclaiming bad clusters.
+ - fixed many incorrect byte sex conversions in check.c and fat.c
+ - -t and -w now require -a or -r
+ - added option -d to drop files.
+ - added option -u to try to "undelete" non-directory files.
_____
Added: trunk/rosapps/sysutils/dosfsck/COPYING
--- trunk/rosapps/sysutils/dosfsck/COPYING 2005-07-27 23:11:38 UTC
(rev 16823)
+++ trunk/rosapps/sysutils/dosfsck/COPYING 2005-07-28 02:37:42 UTC
(rev 16824)
@@ -0,0 +1,345 @@
+The license below applies to dosfsck, which is copyrighted by
+Werner Almesberger <almesber(a)lrc.di.epfl.ch> and Roman Hodek
+<Roman.Hodek(a)informatik.uni-erlangen.de>de>.
+
+
+ GNU GENERAL PUBLIC LICENSE
+ Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.
+ 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
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Hacker.
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+This General Public License does not permit incorporating your program
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_____
Added: trunk/rosapps/sysutils/dosfsck/Makefile
--- trunk/rosapps/sysutils/dosfsck/Makefile 2005-07-27 23:11:38 UTC
(rev 16823)
+++ trunk/rosapps/sysutils/dosfsck/Makefile 2005-07-28 02:37:42 UTC
(rev 16824)
@@ -0,0 +1,44 @@
+CC=mingw32-gcc
+OBJECTS = boot.o check.o common.o dosfsck.o fat.o file.o io.o lfn.o
+
+all: dosfsck.exe
+
+dosfsck.exe: $(OBJECTS)
+ $(CC) -o $@ $(LDFLAGS) $^
+
+.c.o:
+ $(CC) -c $(CFLAGS) $*.c
+
+install: dosfsck
+ mkdir -p $(SBINDIR) $(MANDIR)
+ install -m 755 dosfsck $(SBINDIR)
+ install -m 644 dosfsck.8 $(MANDIR)
+ rm -f $(SBINDIR)/fsck.msdos
+ rm -f $(SBINDIR)/fsck.vfat
+ ln -s dosfsck $(SBINDIR)/fsck.msdos
+ ln -s dosfsck $(SBINDIR)/fsck.vfat
+ rm -f $(MANDIR)/fsck.msdos.8
+ ln -s dosfsck.8 $(MANDIR)/fsck.msdos.8
+ ln -s dosfsck.8 $(MANDIR)/fsck.vfat.8
+
+clean:
+ rm -f *.o *.s *.i *~ \#*# tmp_make .#* .new*
+
+distclean: clean
+ rm -f *.a dosfsck
+
+dep:
+ sed '/\#\#\# Dependencies/q' <Makefile >tmp_make
+ $(CPP) $(CFLAGS) -MM *.c >>tmp_make
+ mv tmp_make Makefile
+
+### Dependencies
+boot.o: boot.c common.h dosfsck.h io.h boot.h
+check.o: check.c common.h dosfsck.h io.h fat.h file.h lfn.h check.h
+common.o: common.c common.h
+dosfsck.o: dosfsck.c common.h dosfsck.h io.h boot.h fat.h file.h \
+ check.h
+fat.o: fat.c common.h dosfsck.h io.h check.h fat.h
+file.o: file.c common.h file.h
+io.o: io.c dosfsck.h common.h io.h
+lfn.o: lfn.c common.h io.h dosfsck.h lfn.h file.h
_____
Added: trunk/rosapps/sysutils/dosfsck/README
--- trunk/rosapps/sysutils/dosfsck/README 2005-07-27 23:11:38 UTC
(rev 16823)
+++ trunk/rosapps/sysutils/dosfsck/README 2005-07-28 02:37:42 UTC
(rev 16824)
@@ -0,0 +1,60 @@
+dosfsck, version 1
+==================
+
+WARNING: This is ALPHA test software. Use at your own risk.
+
+dosfsck is the Linux equivalent of PC/MS-DOS' CHKDSK. It checks the
+consistency of PC/MS-DOS file systems and optionally tries to repair
+them. The tests dosfsck performs are described in the man page.
+
+dosfsck needs header files from dosfs.9 (or later) to compile.
+
+Before using dosfsck to repair a file system that contains data of any
+value, you should verify that dosfsck is able to correct all reported
+errors. (Except fatal errors and those reported as unfixable, of
+course.) In order to do this, run it with the -V option, e.g.
+
+ dosfsck -V /dev/sda1 (automatic check)
+or dosfsck -V -r /dev/sda1 (interactive check and repair)
+
+dosfsck will perform two passes: in the first pass, inconsistencies are
+detected and a list of changes to correct the problems is generated. In
+the second pass, those changes are applied whenever dosfsck reads data
+from disk. Hence no fixable errors should be reported in the second
+pass if the first pass was successful.
+
+Please notify the author if fixable errors are reported in the second
+pass.
+
+After verifying that dosfsck appears to be able to perform the desired
+operations, either confirm that you want the changes to be performed
+(if dosfsck was started with -r) or re-run dosfsck with the -a option
+(if it was started without -r).
+
+Please send bug reports, comments, flames, etc. to
+almesber(a)nessie.cs.id.ethz.ch or almesber(a)bernina.ethz.ch
+
+- Werner
+
+FAT32 and LFN support
+=====================
+
+I've finally implemented some of the new features of MS-DOS
+filesystems: FAT32 and long filenames.
+
+FAT32 is automatically detected and of course the different FAT
+structure is handled. (Internally many changes were needed, so 32 bit
+variables for all cluster numbers and 64 bit vars for offsets inside
+the filesystem.) New checks for FAT32 are most notably on the backup
+boot sector and the new info sector. Also the possibility that the
+root directory resides in a cluster chain (instead of in a static
+area) on FAT32 is handled.
+
+dosfscheck also knows about VFAT long filenames now. It parses those
+names and uses them in listings etc. when available. There are also
+some checks on the (cruel) structure of how LFNs are stored and some
+attempts to fix problems.
+
+- Roman <roman(a)hodek.net>
+
+BTW, version 2 isn't ALPHA anymore :-)
_____
Added: trunk/rosapps/sysutils/dosfsck/boot.c
--- trunk/rosapps/sysutils/dosfsck/boot.c 2005-07-27 23:11:38 UTC
(rev 16823)
+++ trunk/rosapps/sysutils/dosfsck/boot.c 2005-07-28 02:37:42 UTC
(rev 16824)
@@ -0,0 +1,370 @@
+/* boot.c - Read and analyze ia PC/MS-DOS boot sector */
+
+/* Written 1993 by Werner Almesberger */
+
+/* FAT32, VFAT, Atari format support, and various fixes additions May
1998
+ * by Roman Hodek <Roman.Hodek(a)informatik.uni-erlangen.de> */
+
+#include <stdio.h>
+#include <string.h>
+#include <sys/types.h>
+
+#include "common.h"
+#include "dosfsck.h"
+#include "io.h"
+#include "boot.h"
+
+
+#define ROUND_TO_MULTIPLE(n,m) ((n) && (m) ? (n)+(m)-1-((n)-1)%(m) : 0)
+ /* don't divide by zero */
+
+static struct {
+ __u8 media;
+ char *descr;
+} mediabytes[] = {
+ { 0xf0, "5.25\" or 3.5\" HD floppy" },
+ { 0xf8, "hard disk" },
+ { 0xf9, "3,5\" 720k floppy 2s/80tr/9sec or "
+ "5.25\" 1.2M floppy 2s/80tr/15sec" },
+ { 0xfa, "5.25\" 320k floppy 1s/80tr/8sec" },
+ { 0xfb, "3.5\" 640k floppy 2s/80tr/8sec" },
+ { 0xfc, "5.25\" 180k floppy 1s/40tr/9sec" },
+ { 0xfd, "5.25\" 360k floppy 2s/40tr/9sec" },
+ { 0xfe, "5.25\" 160k floppy 1s/40tr/8sec" },
+ { 0xff, "5.25\" 320k floppy 2s/40tr/8sec" },
+};
+
+#if defined __alpha || defined __ia64__ || defined __s390x__ || defined
__x86_64__ || defined __ppc64__
+/* Unaligned fields must first be copied byte-wise */
+#define GET_UNALIGNED_W(f) \
+ ({ \
+ unsigned short __v; \
+ memcpy( &__v, &f, sizeof(__v) ); \
+ CF_LE_W( *(unsigned short *)&f ); \
+ })
+#else
+#define GET_UNALIGNED_W(f) CF_LE_W( *(unsigned short *)&f )
+#endif
+
+
+static char *get_media_descr( unsigned char media )
+{
+ int i;
+
+ for( i = 0; i < sizeof(mediabytes)/sizeof(*mediabytes); ++i ) {
+ if (mediabytes[i].media == media)
+ return( mediabytes[i].descr );
+ }
+ return( "undefined" );
+}
+
+static void dump_boot(DOS_FS *fs,struct boot_sector *b,unsigned lss)
+{
+ unsigned short sectors;
+
+ printf("Boot sector contents:\n");
+ if (!atari_format) {
+ char id[9];
+ strncpy(id,b->system_id,8);
+ id[8] = 0;
+ printf("System ID \"%s\"\n",id);
+ }
+ else {
+ /* On Atari, a 24 bit serial number is stored at offset 8 of the
boot
+ * sector */
+ printf("Serial number 0x%x\n",
+ b->system_id[5] | (b->system_id[6]<<8) |
(b->system_id[7]<<16));
+ }
+ printf("Media byte 0x%02x
(%s)\n",b->media,get_media_descr(b->media));
+ printf("%10d bytes per logical
sector\n",GET_UNALIGNED_W(b->sector_size));
+ printf("%10d bytes per cluster\n",fs->cluster_size);
+ printf("%10d reserved sector%s\n",CF_LE_W(b->reserved),
+ CF_LE_W(b->reserved) == 1 ? "" : "s");
+ printf("First FAT starts at byte %llu (sector %llu)\n",
+ (unsigned long long)fs->fat_start,
+ (unsigned long long)fs->fat_start/lss);
+ printf("%10d FATs, %d bit entries\n",b->fats,fs->fat_bits);
+ printf("%10d bytes per FAT (= %u sectors)\n",fs->fat_size,
+ fs->fat_size/lss);
+ if (!fs->root_cluster) {
+ printf("Root directory starts at byte %llu (sector %llu)\n",
+ (unsigned long long)fs->root_start,
+ (unsigned long long)fs->root_start/lss);
+ printf("%10d root directory entries\n",fs->root_entries);
+ }
+ else {
+ printf( "Root directory start at cluster %lu (arbitrary
size)\n",
+ fs->root_cluster);
+ }
+ printf("Data area starts at byte %llu (sector %llu)\n",
+ (unsigned long long)fs->data_start,
+ (unsigned long long)fs->data_start/lss);
+ printf("%10lu data clusters (%llu bytes)\n",fs->clusters,
+ (unsigned long long)fs->clusters*fs->cluster_size);
+ printf("%u sectors/track, %u heads\n",CF_LE_W(b->secs_track),
+ CF_LE_W(b->heads));
+ printf("%10u hidden sectors\n",
+ atari_format ?
+ /* On Atari, the hidden field is only 16 bit wide and unused
*/
+ (((unsigned char *)&b->hidden)[0] |
+ ((unsigned char *)&b->hidden)[1] << 8) :
+ CF_LE_L(b->hidden));
+ sectors = GET_UNALIGNED_W( b->sectors );
+ printf("%10u sectors total\n", sectors ? sectors :
CF_LE_L(b->total_sect));
+}
+
+static void check_backup_boot(DOS_FS *fs, struct boot_sector *b, int
lss)
+{
+ struct boot_sector b2;
+
+ if (!fs->backupboot_start) {
+ printf( "There is no backup boot sector.\n" );
+ if (CF_LE_W(b->reserved) < 3) {
+ printf( "And there is no space for creating one!\n" );
+ return;
+ }
+ if (interactive)
+ printf( "1) Create one\n2) Do without a backup\n" );
+ else printf( " Auto-creating backup boot block.\n" );
+ if (!interactive || get_key("12","?") == '1') {
+ int bbs;
+ /* The usual place for the backup boot sector is sector 6.
Choose
+ * that or the last reserved sector. */
+ if (CF_LE_W(b->reserved) >= 7 && CF_LE_W(b->info_sector) !=
6)
+ bbs = 6;
+ else {
+ bbs = CF_LE_W(b->reserved) - 1;
+ if (bbs == CF_LE_W(b->info_sector))
+ --bbs; /* this is never 0, as we checked reserved >=
3! */
+ }
+ fs->backupboot_start = bbs*lss;
+ b->backup_boot = CT_LE_W(bbs);
+ fs_write(fs->backupboot_start,sizeof(*b),b);
+ fs_write((off_t)offsetof(struct boot_sector,backup_boot),
+ sizeof(b->backup_boot),&b->backup_boot);
+ printf( "Created backup of boot sector in sector %d\n", bbs
);
+ return;
+ }
+ else return;
+ }
+
+ fs_read(fs->backupboot_start,sizeof(b2),&b2);
+ if (memcmp(b,&b2,sizeof(b2)) != 0) {
+ /* there are any differences */
+ __u8 *p, *q;
+ int i, pos, first = 1;
+ char buf[20];
+
+ printf( "There are differences between boot sector and its
backup.\n" );
+ printf( "Differences: (offset:original/backup)\n " );
+ pos = 2;
+ for( p = (__u8 *)b, q = (__u8 *)&b2, i = 0; i < sizeof(b2);
+ ++p, ++q, ++i ) {
+ if (*p != *q) {
+ sprintf( buf, "%s%u:%02x/%02x", first ? "" : ", ",
+ (unsigned)(p-(__u8 *)b), *p, *q );
+ if (pos + strlen(buf) > 78) printf( "\n " ), pos = 2;
+ printf( "%s", buf );
+ pos += strlen(buf);
+ first = 0;
+ }
+ }
+ printf( "\n" );
+
+ if (interactive)
+ printf( "1) Copy original to backup\n"
+ "2) Copy backup to original\n"
+ "3) No action\n" );
+ else printf( " Not automatically fixing this.\n" );
+ switch (interactive ? get_key("123","?") : '3') {
+ case '1':
+ fs_write(fs->backupboot_start,sizeof(*b),b);
+ break;
+ case '2':
+ fs_write(0,sizeof(b2),&b2);
+ break;
+ default:
+ break;
+ }
+ }
+}
+
+static void init_fsinfo(struct info_sector *i)
+{
+ i->magic = CT_LE_L(0x41615252);
+ i->signature = CT_LE_L(0x61417272);
+ i->free_clusters = CT_LE_L(-1);
+ i->next_cluster = CT_LE_L(2);
+ i->boot_sign = CT_LE_W(0xaa55);
+}
+
+static void read_fsinfo(DOS_FS *fs, struct boot_sector *b,int lss)
+{
+ struct info_sector i;
+
+ if (!b->info_sector) {
+ printf( "No FSINFO sector\n" );
+ if (interactive)
+ printf( "1) Create one\n2) Do without FSINFO\n" );
+ else printf( " Not automatically creating it.\n" );
+ if (interactive && get_key("12","?") == '1') {
+ /* search for a free reserved sector (not boot sector and
not
+ * backup boot sector) */
+ __u32 s;
+ for( s = 1; s < CF_LE_W(b->reserved); ++s )
+ if (s != CF_LE_W(b->backup_boot)) break;
+ if (s > 0 && s < CF_LE_W(b->reserved)) {
+ init_fsinfo(&i);
+ fs_write((off_t)s*lss,sizeof(i),&i);
+ b->info_sector = CT_LE_W(s);
+ fs_write((off_t)offsetof(struct
boot_sector,info_sector),
+ sizeof(b->info_sector),&b->info_sector);
+ if (fs->backupboot_start)
+ fs_write(fs->backupboot_start+
+ offsetof(struct boot_sector,info_sector),
+ sizeof(b->info_sector),&b->info_sector);
+ }
+ else {
+ printf( "No free reserved sector found -- "
+ "no space for FSINFO sector!\n" );
+ return;
+ }
+ }
+ else return;
+ }
+
+ fs->fsinfo_start = CF_LE_W(b->info_sector)*lss;
+ fs_read(fs->fsinfo_start,sizeof(i),&i);
+
+ if (i.magic != CT_LE_L(0x41615252) ||
+ i.signature != CT_LE_L(0x61417272) ||
+ i.boot_sign != CT_LE_W(0xaa55)) {
+ printf( "FSINFO sector has bad magic number(s):\n" );
+ if (i.magic != CT_LE_L(0x41615252))
+ printf( " Offset %llu: 0x%08x != expected 0x%08x\n",
+ (unsigned long long)offsetof(struct
info_sector,magic),
+ CF_LE_L(i.magic),0x41615252);
+ if (i.signature != CT_LE_L(0x61417272))
+ printf( " Offset %llu: 0x%08x != expected 0x%08x\n",
+ (unsigned long long)offsetof(struct
info_sector,signature),
+ CF_LE_L(i.signature),0x61417272);
+ if (i.boot_sign != CT_LE_W(0xaa55))
+ printf( " Offset %llu: 0x%04x != expected 0x%04x\n",
+ (unsigned long long)offsetof(struct
info_sector,boot_sign),
+ CF_LE_W(i.boot_sign),0xaa55);
+ if (interactive)
+ printf( "1) Correct\n2) Don't correct (FSINFO invalid
then)\n" );
+ else printf( " Auto-correcting it.\n" );
+ if (!interactive || get_key("12","?") == '1') {
+ init_fsinfo(&i);
+ fs_write(fs->fsinfo_start,sizeof(i),&i);
+ }
+ else fs->fsinfo_start = 0;
+ }
+
+ if (fs->fsinfo_start)
+ fs->free_clusters = CF_LE_L(i.free_clusters);
+}
+
+void read_boot(DOS_FS *fs)
+{
+ struct boot_sector b;
+ unsigned total_sectors;
+ unsigned short logical_sector_size, sectors;
+ unsigned fat_length;
+ off_t data_size;
+
+ fs_read(0,sizeof(b),&b);
+ logical_sector_size = GET_UNALIGNED_W(b.sector_size);
+ if (!logical_sector_size) die("Logical sector size is zero.");
+ fs->cluster_size = b.cluster_size*logical_sector_size;
+ if (!fs->cluster_size) die("Cluster size is zero.");
+ if (b.fats != 2 && b.fats != 1)
+ die("Currently, only 1 or 2 FATs are supported, not
%d.\n",b.fats);
+ fs->nfats = b.fats;
+ sectors = GET_UNALIGNED_W(b.sectors);
+ total_sectors = sectors ? sectors : CF_LE_L(b.total_sect);
+ if (verbose) printf("Checking we can access the last sector of the
filesystem\n");
+ /* Can't access last odd sector anyway, so round down */
+ fs_test((off_t)((total_sectors & ~1)-1)*(off_t)logical_sector_size,
+ logical_sector_size);
+ fat_length = CF_LE_W(b.fat_length) ?
+ CF_LE_W(b.fat_length) : CF_LE_L(b.fat32_length);
+ fs->fat_start = (off_t)CF_LE_W(b.reserved)*logical_sector_size;
+ fs->root_start = ((off_t)CF_LE_W(b.reserved)+b.fats*fat_length)*
+ logical_sector_size;
+ fs->root_entries = GET_UNALIGNED_W(b.dir_entries);
+ fs->data_start = fs->root_start+ROUND_TO_MULTIPLE(fs->root_entries
<<
+ MSDOS_DIR_BITS,logical_sector_size);
+ data_size =
(off_t)total_sectors*logical_sector_size-fs->data_start;
+ fs->clusters = data_size/fs->cluster_size;
+ fs->root_cluster = 0; /* indicates standard, pre-FAT32 root dir */
+ fs->fsinfo_start = 0; /* no FSINFO structure */
+ fs->free_clusters = -1; /* unknown */
+ if (!b.fat_length && b.fat32_length) {
+ fs->fat_bits = 32;
+ fs->root_cluster = CF_LE_L(b.root_cluster);
+ if (!fs->root_cluster && fs->root_entries)
+ /* M$ hasn't specified this, but it looks reasonable: If
+ * root_cluster is 0 but there is a separate root dir
+ * (root_entries != 0), we handle the root dir the old way.
Give a
+ * warning, but convertig to a root dir in a cluster chain
seems
+ * to complex for now... */
+ printf( "Warning: FAT32 root dir not in cluster chain! "
+ "Compability mode...\n" );
+ else if (!fs->root_cluster && !fs->root_entries)
+ die("No root directory!");
+ else if (fs->root_cluster && fs->root_entries)
+ printf( "Warning: FAT32 root dir is in a cluster chain, but
"
+ "a separate root dir\n"
+ " area is defined. Cannot fix this easily.\n" );
+
+ fs->backupboot_start =
CF_LE_W(b.backup_boot)*logical_sector_size;
+ check_backup_boot(fs,&b,logical_sector_size);
+
+ read_fsinfo(fs,&b,logical_sector_size);
+ }
+ else if (!atari_format) {
+ /* On real MS-DOS, a 16 bit FAT is used whenever there would be
too
+ * much clusers otherwise. */
+ fs->fat_bits = (fs->clusters > MSDOS_FAT12) ? 16 : 12;
+ }
+ else {
+ /* On Atari, things are more difficult: GEMDOS always uses 12bit
FATs
+ * on floppies, and always 16 bit on harddisks. */
+ fs->fat_bits = 16; /* assume 16 bit FAT for now */
+ /* If more clusters than fat entries in 16-bit fat, we assume
+ * it's a real MSDOS FS with 12-bit fat. */
+ if (fs->clusters+2 > fat_length*logical_sector_size*8/16 ||
+ /* if it's a floppy disk --> 12bit fat */
+ device_no == 2 ||
+ /* if it's a ramdisk or loopback device and has one of the
usual
+ * floppy sizes -> 12bit FAT */
+ ((device_no == 1 || device_no == 7) &&
+ (total_sectors == 720 || total_sectors == 1440 ||
+ total_sectors == 2880)))
+ fs->fat_bits = 12;
+ }
+ /* On FAT32, the high 4 bits of a FAT entry are reserved */
+ fs->eff_fat_bits = (fs->fat_bits == 32) ? 28 : fs->fat_bits;
+ fs->fat_size = fat_length*logical_sector_size;
+ if (fs->clusters > ((unsigned long
long)fs->fat_size*8/fs->fat_bits)-2)
+ die("File system has %d clusters but only space for %d FAT
entries.",
+ fs->clusters,((unsigned long
long)fs->fat_size*8/fs->fat_bits)-2);
+ if (!fs->root_entries && !fs->root_cluster)
+ die("Root directory has zero size.");
+ if (fs->root_entries & (MSDOS_DPS-1))
+ die("Root directory (%d entries) doesn't span an integral number
of "
+ "sectors.",fs->root_entries);
+ if (logical_sector_size & (SECTOR_SIZE-1))
+ die("Logical sector size (%d bytes) is not a multiple of the
physical "
+ "sector size.",logical_sector_size);
+ /* ++roman: On Atari, these two fields are often left uninitialized
*/
+ if (!atari_format && (!b.secs_track || !b.heads))
+ die("Invalid disk format in boot sector.");
+ if (verbose) dump_boot(fs,&b,logical_sector_size);
+}
+
+/* Local Variables: */
+/* tab-width: 8 */
+/* End: */
_____
Added: trunk/rosapps/sysutils/dosfsck/boot.h
--- trunk/rosapps/sysutils/dosfsck/boot.h 2005-07-27 23:11:38 UTC
(rev 16823)
+++ trunk/rosapps/sysutils/dosfsck/boot.h 2005-07-28 02:37:42 UTC
(rev 16824)
@@ -0,0 +1,13 @@
+/* boot.h - Read and analyze ia PC/MS-DOS boot sector */
+
+/* Written 1993 by Werner Almesberger */
+
+
+#ifndef _BOOT_H
+#define _BOOT_H
+
+void read_boot(DOS_FS *fs);
+
+/* Reads the boot sector from the currently open device and initializes
*FS */
+
+#endif
_____
Added: trunk/rosapps/sysutils/dosfsck/byteorder.h
--- trunk/rosapps/sysutils/dosfsck/byteorder.h 2005-07-27 23:11:38 UTC
(rev 16823)
+++ trunk/rosapps/sysutils/dosfsck/byteorder.h 2005-07-28 02:37:42 UTC
(rev 16824)
@@ -0,0 +1,59 @@
+#ifndef _I386_BYTEORDER_H
+#define _I386_BYTEORDER_H
+
+//#include "types.h"
+#include "compiler.h"
+
+#ifdef __GNUC__
+
+/* For avoiding bswap on i386 */
+//#ifdef __KERNEL__
+//#include <linux/config.h>
+//#endif
+
+static __inline__ __attribute_const__ __u32 ___arch__swab32(__u32 x)
+{
+#ifdef CONFIG_X86_BSWAP
+ __asm__("bswap %0" : "=r" (x) : "0" (x));
+#else
+ __asm__("xchgb %b0,%h0\n\t" /* swap lower bytes */
+ "rorl $16,%0\n\t" /* swap words */
+ "xchgb %b0,%h0" /* swap higher bytes */
+ :"=q" (x)
+ : "0" (x));
+#endif
+ return x;
+}
+
+static __inline__ __attribute_const__ __u64 ___arch__swab64(__u64 val)
+{
+ union {
+ struct { __u32 a,b; } s;
+ __u64 u;
+ } v;
+ v.u = val;
+#ifdef CONFIG_X86_BSWAP
+ asm("bswapl %0 ; bswapl %1 ; xchgl %0,%1"
+ : "=r" (v.s.a), "=r" (v.s.b)
+ : "0" (v.s.a), "1" (v.s.b));
+#else
+ v.s.a = ___arch__swab32(v.s.a);
+ v.s.b = ___arch__swab32(v.s.b);
+ asm("xchgl %0,%1" : "=r" (v.s.a), "=r" (v.s.b) :
"0" (v.s.a),
"1" (v.s.b));
+#endif
+ return v.u;
+}
+
+/* Do not define swab16. Gcc is smart enough to recognize "C" version
and
+ convert it into rotation or exhange. */
+
+#define __arch__swab64(x) ___arch__swab64(x)
+#define __arch__swab32(x) ___arch__swab32(x)
+
+#define __BYTEORDER_HAS_U64__
+
+#endif /* __GNUC__ */
+
+//#include "little_endian.h"
+
+#endif /* _I386_BYTEORDER_H */
_____
Added: trunk/rosapps/sysutils/dosfsck/byteswap.h
--- trunk/rosapps/sysutils/dosfsck/byteswap.h 2005-07-27 23:11:38 UTC
(rev 16823)
+++ trunk/rosapps/sysutils/dosfsck/byteswap.h 2005-07-28 02:37:42 UTC
(rev 16824)
@@ -0,0 +1,40 @@
+/* Copyright (C) 1997 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#ifndef _BYTESWAP_H
+#define _BYTESWAP_H 1
+
+/* Get the machine specific, optimized definitions. */
+#include "byteswap1.h"
+
+
+/* The following definitions must all be macros since otherwise some
+ of the possible optimizations are not possible. */
+
+/* Return a value with all bytes in the 16 bit argument swapped. */
+#define bswap_16(x) __bswap_16 (x)
+
+/* Return a value with all bytes in the 32 bit argument swapped. */
+#define bswap_32(x) __bswap_32 (x)
+
+#if defined __GNUC__ && __GNUC__ >= 2
+/* Return a value with all bytes in the 64 bit argument swapped. */
+# define bswap_64(x) __bswap_64 (x)
+#endif
+
+#endif /* byteswap.h */
_____
Added: trunk/rosapps/sysutils/dosfsck/byteswap1.h
--- trunk/rosapps/sysutils/dosfsck/byteswap1.h 2005-07-27 23:11:38 UTC
(rev 16823)
+++ trunk/rosapps/sysutils/dosfsck/byteswap1.h 2005-07-28 02:37:42 UTC
(rev 16824)
@@ -0,0 +1,133 @@
+/* Macros to swap the order of bytes in integer values.
+ Copyright (C) 1997, 1998, 2000, 2002, 2003 Free Software Foundation,
Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
[truncated at 1000 lines; 7350 more skipped]