path: root/TODO

-*- Mode: Outline -*-

Things to be done on Hurd, that we should probably not punt to a volunteer.

See `tasks', the exported task list.

* RMS dictates:
** O_RDONLY==0
** "user-friendly" naming scheme for /dev

* Emacs M-x shell seems to start all the ptys.
* Settle termcap v. curses with rms et. al.
* Contents of =pending-changes.
* Make sure all the pieces of the Hurd have adequate version stuff.
* syslogify everything
* fix root dependencies in filesystem, network, etc.
* Profile things
* Make for easier installation
* Write coding standards suggestions for Hurd
* Implement file_fetch_dir

* Fix emacs/src/unexelf.c to deal with occasional lack of mmap

* Libraries

** general:
*** fsys_get_options should return: prog name in argv[0]; non-option 
    program args, e.g. the diskfs device, or nfs mount 
*** Enable compilation without -O

** libmom work:
*** Hack interface definitions so that args are mom-ish
*** Change libports and libpager to be mom-ish
*** Change servers to be mom-ish

** libc:
*** Version of tmpfile that takes a directory
*** Hurd versions of tmpfile that don't create transient files
*** flink
*** make sure profiling works
*** implement revoke once io_revoke is added.

** libports:
*** Get rid of general `uninibited-rpcs' mechanism in libports, & just
    special-case interrupt_operation.
*** Drop wire parms to manage-operations; instead have a new-thread hook
    function.

** libstore:
*** test it and make diskfs use it.

** libfsserver/libnetfs:
*** convert libnetfs to libfsserver

** libnetfs
*** Support --readonly, --writable, and --update

** libpager:
*** Put user-defined fns into a callback struct passed to pager_create.
*** Make libpager paging interface able to read/write multiple pages at once.
*** Check all users of pager-create.c to make sure they DTRT when it returns
    null.  (requires changing libdiskfs to deal with null
    returns from diskfs_get_filemap).

** libshouldbeinlibc:
*** Merge contents of libshouldbeinlibc that belong there into libc.
   Rename the rest to libhurdutil or somesuch.
*** argp: find some way to flag certain long options as only matching
   exactly (add this as OPT_EXACT); use this on the built in option
   --program-name. 
*** Rewrite argp to do its own parsing.  Preferably, split up libc's
   getopt into more primitive functions, which both argp and getopt
   can call.

** libdiskfs
*** Add the short-circuited-but-not-builtin translator startup code from
    dir-lookup to fsys_getroot.  Compare and match carefully these two
    routines and then share common code.
*** Handle dead name notifications on execserver ports.
*** Deal correctly with setting the translators on /servers/exec.
*** Implement file_notice_changes.
*** Implement async I/O.
*** Think of a way to have when-to-sync-nodes be more flexible so it can
    be done right for each format.
*** Check when-to-sync-nodes carefully against BSD 4.4 ufs implementation.
*** Provide for MNT_SYNCHRONOUS, MNT_NOEXEC, MNT_NOSUID, MNT_NODEV, etc.
*** Implement io_restrict_auth correctly.
*** Use libstore.
*** Use off_t correctly.
*** Add a consistent message printing facility for filesystems to use
    (syslog, but takes special care when the root file system?).
*** Some of diskfs_readonly_changed in ufs/ext2fs should be in generic 
    routines. 
*** fsys_get_options should return the disk name.
*** Add `author_tracks_uid' flag to struct node, and use it in places 
    that modify author/uid.  Initialized to 0.
*** Use idvecs.

** libfshelp
*** Put functions here to deal with directory and file change notifications?
*** Translator startup should provide a more useful stdin/stdout than nothing?
*** Add functions to do permission checking and change libdiskfs et. al.
    to use them.

** libpager
*** Change interface to be more efficient with multi-page data-return calls.
*** Remove pagers from portset if there are too many incoming requests to
    avoid forking too many threads.
*** flush functions don't actually force pending delayed copies. (and in
    fact, they seem to block if a delayed copy is wired down)

** libtrivfs
*** Allow for read/write/exec to be passed down.
*** Implement file_exec when appropriate.
*** Provide for the visible owner, etc., to be held in command-line args
    instead of the underlying node, when it's important.

** libps
*** Wizzior columnation (autosizing?)
*** Make getters more robust.

* Servers
** write default pager
** Implement goaway in all the servers that don't already have it.
** (init) sleep on spinning gettys
** Add calls to various servers to return interesting statistical information.
** Test new-fifo & make it fifo.
** Login/utmp?
** fifos are flaky.  ?? Details ??
** pflocal: make peer addresses work?
** zero (/dev/null) doesn't do access right; probably many in trans/ too.

** proc:
*** Add a version of proc_wait usable by non-parent processes, and use it in
    gdb; maybe just a flag WNOREAP to proc_wait that doesn't reap and allows
    anyone to use it.
*** Add proc_get_tty() [returns tty opened with no flags], so that ps can be
    non-suid.
*** Remove hostname/hostid functions
*** add timeouts to all the msg_* calls proc makes.

** pfinet
*** Allow multiple pfinets to arp on the same ethernet interface for different
    IP addresses.
*** Diagnose why shutdown doesn't close TCP channels properly or reliably.
*** select for read on a UDP socket seems never to return.

** nfs
*** Implement async I/O
*** Finish work to turn on paging.
*** Finish excl arg work in link and rename.
*** Implement TCP nfs.
*** Implement V3 nfs.
*** Implement nqnfs.
*** Add Hurd-specific calls.

** devio:
*** Make a server (/servers/devio?) to share multiple devio nodes?
*** Use libstore.
*** Make block devices work again.
*** MAKEDEV should be able to make physical terminal devs.
*** Get rid of global DEVICE variable and use the trivfs control hack.
*** Serverify, ala new-fifo.

** ufs:
*** Implement clustering, a la 4.4-lite sys/kern/vfs_cluster.c.
*** Make file_get_storage_info work for files with indirect blocks.
*** Optimizations:
    pager.c/inode.c/libdiskfs count pager refs separately and then save
      mappings in _diskfs_rdwr_internal and dir.c
*** Problems with DT_* hack:
****   Fix multiple-links DT_* bug.
****   Deal with change of type which should update directory.
****   Type is also wrong for translated nodes...
*** Roland sez: ENOSPC detection flaky in ufs.  Try write of >page, 
    non-page-multiple, when free space allows write size but not 
    round_page (write size).

** ext2fs
*** Support chflags/st_flags and convert to/from ext2 flags on disk.
*** Try to write directories with 512-byte record boundaries.
*** Maybe file_pager_write_page should be able to accurately reproduce holes...
*** Add byte-swapping.
*** Implement file_getfh and fsys_getfile.

** crash
*** Write core files.


* Utilities
** Write a real mount program.
** Make id, et. al. work with no/multiple uids.
** Make things work with the `nobody' mode bits: chmod, ls, ...
** Make things work better with translators, e.g., tar...
** Fix bash to turn on interrupts around syscalls more generally,
    especially chdir.
** Make su work.
** Bug: `hostname' command with no /etc/hostname hangs the system 
   with disk light going.
** talk doesn't work
** login: Make --retry work correctly when invoked via a suid shell
    script by other than root (it doesn't now if the script specifies
    --retry="$0" because the exec server will use /dev/fd/N for name,
    and child_lookup() doesn't supply more than fds 0-2).
** fsck should use (not-yet-added) fsys_get_options returned device instead 
   of /etc/fstab.
** Write/port the various helpful mach info programs in UX (vminfo, etc).
** Serverboot doesn't deal with symlinks properly.
** Grub doesn't deal with symlinks properly.

** settrans:
*** needs an option to make the active go away without using goaway.
*** -P should print the pid of the translator before pausing

** ps:
*** ps should timeout quickly (one second?) on non-responsive message ports.
*** help displays for: stat letters, format specs.
*** Add head/tail options; --match?

** gdb:
*** Add various mach convenience features (vminfo, &c).
*** Be even more vigilant about noticing new threads.  In particular:
**** For mach-indep thread commands, before validating against 
     internal thread list.
*** read core files

** nfsd
*** Implement TCP nfs.
*** Implement V3 nfs.
*** Implement nqnfs.
*** Add Hurd-specific calls.
*** writes don't seem to work properly

** fsck.ufs -- zero-length directories and attachment into lost+found still 
   don't work; link counts seem to be mangled.

* Mach:
** Have some analogue of /dev/klog that syslogd can get kernel messages from
    (maybe there is already?); the boot file system, and other people deeming
    it too risk to attempt to contact syslogd can use it too?
** Add a startup timestamp to tasks, and have some way of fetching it.