Work on swapped-endian FFS.

branches: 1.10.6;
remove GCC_NO_ADDR_OF_PACKED_MEMBER for several subdir builds
that are now handled by lfs_accessors.h internally.

add support for new GCC 9 warnings that may be too much to fix
right now. new address-of-packed-member and format-overflow
warnings have new GCC_NO_ADDR_OF_PACKED_MEMBER amd
GCC_NO_FORMAT_OVERFLOW variables to remove these warnings.

apply to a bunch of the tree. mostly, these are real bugs that
should be fixed, but in many cases, only by removing the 'packed'
attribute from some structure that doesn't really need it. (i
looked at many different ones, and while perhaps 60-80% were
already properly aligned, it wasn't clear to me that the uses
were always coming from sane data vs network alignment, so it
doesn't seem safe to remove packed without careful research for
each affect struct.) clang already warned (and was not erroring)
for many of these cases, but gcc picked up dozens more.

Add a "-b" option to search a partition for valid alternate superblocks,
rather than searching the disk for partitions. Also, test LFS superblock
checksums before we report them.

branches: 1.7.4;
Specify the scan_ffs manpage, otherwise it will use scan_ffs.1.

Fold scan_lfs.8 into scan_ffs.8. It's the same program, after all.
Ok'd by xtraeme.

Add scan_lfs(8), utility to find LFS partitions on disk, useful
to recover lost disklabels.

Move WARNS=3 to the Makefile.inc, and add a little const to the remaining
programs that did not compile before.

WARNS=4, misc cleanups.
- void casts
- remove unused notreached
- use a loop instead of code duplication
- use switches and #define constants

No need to define SRCS here.

Add scan_ffs(8) from OpenBSD, it was modified to support FFSv2
for NetBSD (with different blocksizes). Utility to find
FFSv1 and FFSv2 partitions on disks, useful to recover lost
disklabels.

Reviewed by christos.

Bump date.

Add a "-b" option to search a partition for valid alternate superblocks,
rather than searching the disk for partitions. Also, test LFS superblock
checksums before we report them.

Improve English.

Detect FFSv1 partitions with fragsize/blocksize greater than
2048/16384.

Sort options in usage and SYNOPSIS.

Change -f to -F, per mrg's suggestion.

Add -f file support. Useful to search for partitions on disk images.

scan_ffs(8) has been pulled up into netbsd-3 and thus will have
"first appeared in NetBSD 3.1", not 4.0.

branches: 1.6.2; 1.6.4;
Fold scan_lfs.8 into scan_ffs.8. It's the same program, after all.
Ok'd by xtraeme.

Improve wording and comma usage.

Remove superfluous .El; a slight wording change.

Incorporate my review comments.

fix the date, use .An for names, correct the name (scanffs -> scan_ffs),
.Ox/.Nx for OpenBSD/NetBSD, mention appearance in NetBSD.

Add scan_ffs(8) from OpenBSD, it was modified to support FFSv2
for NetBSD (with different blocksizes). Utility to find
FFSv1 and FFSv2 partitions on disks, useful to recover lost
disklabels.

Reviewed by christos.

Work on swapped-endian FFS.

branches: 1.36.2;
Restore backward compatibility of UFS2 with previous NetBSD releases by
disabling support in UFS2 for extended attributes (including ACLs).
Add a new variant of UFS2 called "UFS2ea" that does support extended attributes.
Add new fsck_ffs operations "-c ea" and "-c no-ea" to convert file systems
from UFS2 to UFS2ea and vice-versa (both of which delete all existing extended
attributes in the process).

O_CLOEXEC is not a mode :-)

- use /dev/tty instead of stderr for SIGINFO messages
- use uintmax_t instead of ull
- print fractional percentage to show that we are making progress on large
disks.

add SIGINFO support. now you can know how far along the scan is.

Teach scan_ffs about lfs64.
(and also about byte-swapped lfs volumes, which might or might not
actually work)

Add a (draft) 64-bit superblock. Make things build again.

Add pieces of support for using both superblock types where
convenient, and specifically to the superblock accessors, but don't
actually enable it anywhere.

First substantive step on PR 50000.

Use accessor functions for the version field of the lfs superblock.
I thought at first maybe the cases that test the version should be
rolled into the accessors, but on the whole I think the conclusion on
that is no.

Fix assorted 64 -> 32 truncations in lfs. Also, some minor tidyups and
corrections in passing.

Add a new lfs header file: lfs_accessors.h.

This contains all the accessor functions and macros out of lfs.h.
Add an include of lfs_accessors.h after all uses of lfs.h... except
for code that wants to define its own struct lfs-alike that the
accessors are supposed to play along with. For these, set STRUCT_LFS
and include lfs_accessors.h after the necessary structure has been
defined, so that lfs_accessors.h can emit functions in terms of it.

More lfs superblock accessors.
(This changes the rest of the code over; all the accessors were
already added.)

The difference between this commit and the previous one is arbitrary,
but the previous one passed the regression tests on its own so I'm
keeping it separate to help with any bisections that might be needed
in the future.

Switch to accessor functions for elements of the LFS on-disk
superblock. This will allow switching between 32/64 bit forms on the
fly; it will also allow handling LFS_EI reasonably tidily. (That
currently doesn't work on the superblock.)

It also gets rid of cpp abuse in the form of fake structure member
macros.

Also, instead of doing sleep/wakeup on &lfs_avail and &lfs_nextseg
inside the on-disk superblock, add extra elements to the in-memory
struct lfs for this. (XXX: these should be changed to condvars, but
not right now)

XXX: this migrates a structure needed by the lfs code in libsa (struct
salfs) into lfs.h, where it doesn't belong, but for the time being
this is necessary in order to allow the accessors (and the various
lfs macros and other goop that relies on them) to compile.

Stick ffs_ in front of the following macros:
fragstoblks()
blkstofrags()
fragnum()
blknum()

to finish the job of distinguishing them from the lfs versions, which
Christos renamed the other day.

I believe this is the last of the overtly ambiguous exported symbols
from ffs... or at least, the last of the ones that conflicted with lfs.
ffs still pollutes the C namespace very broadly (as does ufs) and this
needs quite a bit more cleanup.

XXX: boo on macros with lowercase names. But I'm not tackling that just yet.

Stick ffs_, ext2_, chfs_, filecore_, cd9660_, or mfs_ in front of
the following symbols so as to disambiguate fully. (Christos already
did the lfs ones.)

lblkno
lblktosize
lfragtosize
numfrags
blkroundup
fragroundup

fsbtodb() -> FFS_FSBTODB(), EXT2_FSBTODB(), or MFS_FSBTODB()
dbtofsb() -> FFS_DBTOFSB() or EXT2_DBTOFSB()

(Christos already did the lfs ones a few days back)

Rename ambiguous macros:
MAXDIRSIZE -> UFS_MAXDIRSIZE or LFS_MAXDIRSIZE
NINDIR -> FFS_NINDIR, EXT2_NINDIR, LFS_NINDIR, or MFS_NINDIR
INOPB -> FFS_INOPB, LFS_INOPB
INOPF -> FFS_INOPF, LFS_INOPF
blksize -> ffs_blksize, ext2_blksize, or lfs_blksize
sblksize -> ffs_blksize

These are not the only ambiguously defined filesystem macros, of
course, there's a pile more. I may not have found all the ambiguous
definitions of blksize(), too, as there are a lot of other things
called 'blksize' in the system.

branches: 1.21.6; 1.21.12;
fix sign-compare issues

branches: 1.20.12;
convert __attribute__s to applicable cdefs.h macros

branches: 1.19.2;
Use a two clause license for all the code I contributed.

The envsys code will be changed later.

branches: 1.18.4;
Add -b flag into usage().

Add a "-b" option to search a partition for valid alternate superblocks,
rather than searching the disk for partitions. Also, test LFS superblock
checksums before we report them.

* There's no need to use an int to store the returned value of
ffs_checkver() and later use it in the switch statement, just
use ffs_checkver.
* Remove unneded <sys/queue.h> header.
* Remove LFS from fstypes, it was never used.
* Increase SBCOUNT to 128, works faster.
* Remove unneded casts.
* (-F mode) close fd when the scan has finished or if pread() failed.
* (-F mode) print total size of file.

Use O_DIRECT (aka Direct I/O) when -F is used.

Detect FFSv1 partitions with fragsize/blocksize greater than
2048/16384.

Sort options in usage and SYNOPSIS.

- Change the cast of st_size to uint64_t to avoid future problems
with large files.
- u_uintXX_t -> uintXX_t

Change -f to -F, per mrg's suggestion.

Add -f file support. Useful to search for partitions on disk images.

branches: 1.9.2; 1.9.4;
Remove an extra conditional while searching for LFS superblocks,
it's not needed.

Undefine the 17 macros commonly defined by <ufs/ffs/fs.h> and
<ufs/lfs/lfs.h> before including the second of them, and also after
including the second, to ensure the rest of the code doesn't depend
on their (ambigious) definition.

This fixes a build problem for vax; gcc 2.95.3's preprocessor
apparently doesn't like redefinition of macros.

Discussed with xtraeme.

* Replace lseek() and read() calls with one single pread()
* Align cpg/sgs correctly.

Pass lint and get/setprogname.

Add scan_lfs(8), utility to find LFS partitions on disk, useful
to recover lost disklabels.

Add missing '\n' into usage().

WARNS=4, misc cleanups.
- void casts
- remove unused notreached
- use a loop instead of code duplication
- use switches and #define constants

Use EXIT_{SUCCESS,FAILURE}.

Add scan_ffs(8) from OpenBSD, it was modified to support FFSv2
for NetBSD (with different blocksizes). Utility to find
FFSv1 and FFSv2 partitions on disks, useful to recover lost
disklabels.

Reviewed by christos.

Fold scan_lfs.8 into scan_ffs.8. It's the same program, after all.
Ok'd by xtraeme.

typo

Add scan_lfs(8), utility to find LFS partitions on disk, useful
to recover lost disklabels.