remove fossil manpages

2 files changed, 0 insertions, 1686 deletions

diff --git a/sys/man/4/fossil b/sys/man/4/fossil
deleted file mode 100644
index 602410a14..000000000
--- a/sys/man/4/fossil
+++ /dev/null
@@ -1,506 +0,0 @@
-.TH FOSSIL 4
-.SH NAME
-fossil, flchk, flfmt \- archival file server
-.SH SYNOPSIS
-.B fossil/fossil
-[
-.B -Dt
-]
-[
-.B -c
-.I cmd
-]...
-[
-.B -f
-.I file
-]
-[
-.B -m
-.I free-memory%
-]
-.PP
-.B fossil/flchk
-[
-.B -f
-]
-[
-.B -c
-.I ncache
-]
-[
-.B -h
-.I host
-]
-.I file
-.PP
-.B fossil/flfmt
-[
-.B -y
-]
-[
-.B -b
-.I blocksize
-]
-[
-.B -h
-.I host
-]
-[
-.B -l
-.I label
-]
-[
-.B -v
-.I score
-]
-.I file
-.PP
-.B fossil/conf
-[
-.B -w
-]
-.I file
-[
-.I config
-]
-.PP
-.B fossil/last
-.I file
-.SH DESCRIPTION
-.I Fossil
-is the main file system for Plan 9.
-Unlike the Plan 9 file servers of old,
-.I fossil
-is a collection of user-space programs that run on a standard Plan 9 kernel.
-The name of the main fossil file server at Murray Hill is
-.BR pie .
-The Plan 9 distribution file server,
-.BR sources ,
-is also a fossil server.
-.PP
-.I Fossil
-is structured as a magnetic disk write buffer
-optionally backed by a Venti server for archival storage.
-It serves the Plan 9 protocol via TCP.
-A
-.I fossil
-file server conventionally presents
-three trees in the root directory of each file system:
-.BR active ,
-.BR archive ,
-and
-.BR snapshot .
-.B /active
-is the root of a conventional file system
-whose blocks are stored in a disk file.
-In a typical configuration, the file server periodically
-marks the entire file system copy-on-write, effectively
-taking a snapshot of the file system at that moment.
-This snapshot is made available in a name
-created from the date and time of the snapshot:
-.BI /snapshot/ yyyy / mmdd / hhmm \fR,
-where
-.I yyyy
-is the full year,
-.I mm
-is the month number,
-.I dd
-is the day number,
-.I hh
-is the hour,
-and
-.I mm
-is the minute.
-The snapshots in
-.B /snapshot
-are ephemeral: eventually they are deleted
-to reclaim the disk space they occupy.
-Long-lasting snapshots stored on a Venti server
-are kept in 
-.B /archive
-and also named from the date (though not the time) of the snapshot:
-.BI /archive/ yyyy / mmdds \fR,
-where
-.IR yyyy ,
-.IR mm ,
-and
-.I dd
-are year, month, and day as before,
-and
-.I s
-is a sequence number if more than one
-archival snapshot is done in a day.
-For the first snapshot,
-.I s
-is null.
-For the subsequent snapshots,
-.I s
-is
-.BR .1 ,
-.BR .2 ,
-.BR .3 ,
-etc.
-The root of the main file system that is frozen
-for the first archival snapshot of December 15, 2002
-will be named
-.BR /archive/2002/1215/ .
-.PP
-The attach name used in
-.I mount
-(see
-.IR bind (1),
-.IR bind (2)
-and
-.IR attach (5))
-selects a file system to be served
-and optionally a subtree,
-in the format
-.IB fs \fR[\fB/ dir \fR].
-An empty attach name selects
-.BR main/active .
-.PP
-.I Fossil
-normally requires all users except
-.L none
-to provide authentication tickets on each
-.IR attach (5).
-To keep just anyone from connecting,
-.L none
-is only allowed to attach after another user
-has successfully attached on the same
-connection.
-The other user effectively acts as a chaperone
-for
-.LR none .
-Authentication can be disabled using the
-.B -A
-flag to
-.B open
-or
-.B srv
-(see
-.IR fossilcons (8)).
-.PP
-The groups called
-.B noworld
-and
-.B write
-are special on the file server.
-Any user belonging to
-.B noworld
-has attenuated access privileges.
-Specifically, when checking such a user's access to files,
-the file's permission bits are first ANDed
-with 0770 for normal files and 0771 for directories.
-The effect is to deny world access permissions to
-.B noworld
-users, except when walking into directories.
-If the
-.B write
-group exists, then the file system appears read-only
-to users not in the group.
-This is used to make the Plan 9 distribution file server
-.RI ( sources.cs.bell-labs.com )
-readable by the world but writable only to the developers.
-.PP
-.I Fossil
-starts a new instance of the fossil file server.
-It is configured mainly through console commands,
-documented in
-.IR fossilcons (8).
-.PP
-The options are:
-.TP
-.B -D
-Toggle the debugging flag, which is initially off.
-When the flag is set, information about authentication
-and all protocol messages are written to standard error.
-.TP
-.B -t
-Start a file server console on
-.BR /dev/cons .
-If this option is given,
-.I fossil
-does not fork itself into the background.
-.TP
-.BI -c " cmd
-Execute the console command
-.IR cmd .
-This option may be repeated to give multiple
-commands.
-Typically the only commands given on the
-command line are
-.RB `` . \fIfile \fR,''
-which executes a file containing commands,
-and
-.RB `` "srv -p" \fIcons \fR,''
-which starts a file server console on
-.BI /srv/ cons \fR.
-See
-.IR fossilcons (8)
-for more information.
-.TP
-.BI -f " file
-Read and execute console commands stored in the Fossil disk 
-.IR file .
-.I Conf
-.RI ( q.v. )
-reads and writes the command set stored in the disk.
-.TP
-.B -m
-Allocate
-.I free-memory%
-percent of the available free RAM for buffers.
-This overrides all other memory sizing parameters,
-notably the
-.B -c
-option to
-.BR open .
-.PD
-.PP
-.I Flchk
-checks the fossil file system stored in
-.I file
-for inconsistencies.
-.I Flchk
-is deprecated in favor of the console
-.B check
-command (see
-.IR fossilcons (8)).
-.I Flchk
-prints
-.I fossil
-console commands that may be
-executed to take care of
-bad pointers
-.RB ( clrp ),
-bad entries
-.RB ( clre ),
-bad directory entries
-.RB ( clri ),
-unreachable blocks
-.RB ( bfree ).
-Console commands are interspersed with
-more detailed commentary on the file system.
-The commands are distinguished by being prefixed with
-sharp signs.
-Note that all proposed fixes are rather drastic: offending
-pieces of file system are simply chopped off.
-.PP
-.I Flchk
-does
-.I not
-modify the file system, so it is safe to
-run concurrently with
-.IR fossil ,
-though in this case
-the list of unreachable
-blocks and any inconsistencies involving the active file system
-should be taken with a grain of salt.
-.PP
-The options are:
-.TP
-.B -f
-Fast mode.
-By default,
-.I flchk
-checks the entire file system image for consistency,
-which includes all the archives to Venti
-and can take a very long time.
-In fast mode,
-.I flchk
-avoids walking in Venti blocks
-whenever possible.
-.TP
-.BI -c " ncache
-Keep a cache of
-.I ncache
-(by default, 1000)
-file system blocks in memory during the check.
-.TP
-.BI -h " host
-Use
-.I host
-as the Venti server.
-.PD
-.PP
-.I Flfmt
-prepares
-.I file
-as a new fossil file system.
-The file system is initialized with three empty directories
-.BR active ,
-.BR archive ,
-and
-.BR snapshot ,
-as described above.
-The options are:
-.TP
-.B -y
-Yes mode.
-By default,
-.I flfmt
-will prompt for confirmation before formatting
-a file that already contains a fossil file system,
-and before formatting a file that is not served
-directly by a kernel device.
-If the
-.B -y
-flag is given, no such checks are made.
-.TP
-.BI -b " blocksize
-Set the file system block size (by default, 8192).
-.TP
-.BI -h " host
-Use
-.I host
-as the Venti server.
-.TP
-.BI -l " label
-Set the textual label on the file system to
-.IR label .
-The label is only a comment.
-.TP
-.BI -v " score
-Initialize the file system using the vac file
-system stored on Venti at
-.IR score .
-The score should have been generated by
-.I fossil
-rather than by
-.IR vac (1),
-so that the appropriate snapshot metadata is present.
-.PD
-.PP
-.I Conf
-reads or writes the configuration branded on the Fossil disk
-.IR file .
-By default, it reads the configuration from the disk and prints it to
-standard output.
-If the
-.B -w
-flag is given,
-.I conf
-reads a new configuration from 
-.I config
-(or else from standard input)
-and writes it to the disk.
-Inside the configuration file, the argument
-.L *
-may be used to stand in for the name of the disk holding the configuration.
-The Plan 9 kernel boot process runs
-.RB `` fossil
-.B -f
-.IR disk ''
-to start a Fossil file server.
-The disk is just a convenient place to store configuration
-information.
-.PP
-.I Last
-prints the vac score that resulted after the most recent archival snapshot 
-of the fossil in
-.I file.
-.SH EXAMPLES
-.PP
-Place the root of the archive file system on
-.B /n/dump
-and show the modified times of the MIPS C compiler
-over all dumps in December 2002:
-.IP
-.EX
-9fs dump
-ls -l /n/dump/2002/12*/mips/bin/vc
-.EE
-.PP
-To get only one line of output for each version of the compiler:
-.IP
-.EX
-ls -lp /n/dump/2002/12*/mips/bin/vc | uniq
-.EE
-.ne 14
-.PP
-Initialize a new file system, start the server with permission
-checking turned off, create a users file, and mount the server:
-.IP
-.EX
-fossil/flfmt /dev/sdC0/fossil
-fossil/conf -w /dev/sdC0/fossil <<EOF
-fsys main config /dev/sdC0/fossil
-fsys main open -AWP
-fsys main
-create /active/adm adm sys d775
-create /active/adm/users adm sys 664
-users -w
-srv -p fscons
-srv fossil
-EOF
-fossil/fossil -f /dev/sdC0/fossil
-mount /srv/fossil /n/fossil
-.EE
-.LP
-See the discussion of the
-.B users
-and
-.B uname
-commands in
-.IR fossilcons (8)
-for more about the user table.
-.ne 3
-.PP
-Perhaps because the disk has been corrupted or replaced,
-format a new file system using the last archive score printed
-on the console:
-.IP
-.EX
-fossil/flfmt -v b9b3...5559 /dev/sdC0/fossil
-.EE
-.LP
-Note that while
-.B /snapshot
-will be lost,
-.B /active
-and
-.B /archive
-will be restored to their contents at the time of the
-last archival snapshot.
-.ne 3
-.PP
-Blindly accept the changes prescribed by
-.I flchk
-(not recommended):
-.IP
-.EX
-fossil/flchk /dev/sdC0/fossil | sed -n 's/^# //p' >>/srv/fscons
-.EE
-.LP
-A better strategy is to vet the output,
-filter out any suggestions you're not comfortable with,
-and then use the
-.I sed
-command to prepare the script.
-.SH SOURCE
-.B /sys/src/cmd/fossil
-.SH SEE ALSO
-.IR yesterday (1),
-.IR fs (3),
-.IR fs (4),
-.IR srv (4),
-.IR fossilcons (8),
-.IR venti (8)
-.SH BUGS
-It is possible that the disk format (but not the Venti format)
-will change in the future, to make the disk a full cache
-rather than just a write buffer.
-Changing to the new format will require reformatting
-the disk as in the example above,
-but note that this will preserve most of the file system
-(all but
-.BR /snapshot )
-with little effort.
-.PP
-The
-.B -m
-option currently assumes a block size of 8K bytes,
-and a single file system per
-.I fossil
-instance.
diff --git a/sys/man/8/fossilcons b/sys/man/8/fossilcons
deleted file mode 100644
index 64fd26085..000000000
--- a/sys/man/8/fossilcons
+++ /dev/null
@@ -1,1180 +0,0 @@
-.TH FOSSILCONS 8
-.SH NAME
-fossilcons \- fossil console commands
-.SH SYNOPSIS
-.B
-con /srv/fscons
-.PP
-.PD 0.1
-.B .
-.I file
-.PP
-.B 9p
-.I T-message
-...
-.PP
-.B bind
-[
-.B -b|-a|-c|-bc|-ac
-]
-.I new
-.I old
-.PP
-.B dflag
-.PP
-.B echo
-[
-.B -n
-]
-[
-.I arg
-...
-]
-.PP
-.B listen
-[
-.B -INd
-]
-[
-.I address
-]
-.PP
-.B msg
-[
-.B -m
-.I nmsg
-]
-[
-.B -p
-.I nproc
-]
-.PP
-.B printconfig
-.PP
-.B srv
-[
-.B -APWdp
-]
-.I name
-.PP
-.B uname
-.I name
-[
-.I id
-|
-.BI : id
-|
-.BI % newname
-|
-.BI = leader
-|
-.BI + member
-|
-.BI - member
-]
-.PP
-.B users
-[
-.B -d
-|
-.B -r
-.I file
-]
-[
-.B -w
-]
-.PP
-.B who
-.sp
-.PP
-.B fsys
-.I name
-.PP
-.B fsys
-.I name
-.B config
-.I device
-.PP
-.B fsys
-.I name
-.B venti
-[
-.I host
-]
-.PP
-.B fsys
-.I name
-.B open
-[
-.B -APVWr
-]
-[
-.B -c
-.I ncache
-]
-.PP
-[
-.B fsys
-.I name
-]
-.B close
-.PP
-.B fsys
-.I name
-.B unconfig
-.sp
-.PP
-[
-.B fsys
-.I name
-]
-.B bfree
-.I addr
-.PP
-[
-.B fsys
-.I name
-]
-.B block
-.I addr
-.I offset
-[
-.I count
-[
-.I data
-]]
-.PP
-.in +1i
-.ti -1i
-[
-.B fsys
-.I name
-]
-.B check
-[
-.B pblock
-] [
-.B pdir
-] [
-.B pfile
-] [
-.B bclose
-] [
-.B clri
-] [
-.B clre
-] [
-.B clrp
-] [
-.B fix
-] [
-.B venti
-] [
-.B snapshot
-]
-.PP
-[
-.B fsys
-.I name
-]
-.B clre
-.I addr
-.I offsets
-\&...
-.PP
-[
-.B fsys
-.I name
-]
-.B clri
-.I files
-\&...
-.PP
-[
-.B fsys
-.I name
-]
-.B clrp
-.I addr
-.I offset
-\&...
-.PP
-[
-.B fsys
-.I name
-]
-.B create
-.I path
-.I uid
-.I gid
-.I perm
-.PP
-[
-.B fsys
-.I name
-]
-.B df
-.PP
-[
-.B fsys
-.I name
-]
-.B epoch
-[[
-.B -ry
-]
-.I n
-]
-.PP
-[
-.B fsys
-.I name
-]
-.B halt
-.PP
-[
-.B fsys
-.I name
-]
-.B label
-.I addr
-[
-.I type
-.I state
-.I epoch
-.I epochclose
-.I tag
-]
-.PP
-[
-.B fsys
-.I name
-]
-.B remove
-.I files
-\&...
-.PP
-[
-.B fsys
-.I name
-]
-.B snap
-[
-.B -a
-]
-[
-.B -s
-.I src
-]
-[
-.B -d
-.I dst
-]
-.PP
-[
-.B fsys
-.I name
-]
-.B snapclean
-[
-.I timeout
-]
-.PP
-[
-.B fsys
-.I name
-]
-.B snaptime
-[
-.B -a
-.I hhmm
-]
-[
-.B -s
-.I interval
-]
-[
-.B -t
-.I timeout
-]
-.PP
-[
-.B fsys
-.I name
-]
-.B stat
-.IR files ...
-.PP
-[
-.B fsys
-.I name
-]
-.B sync
-.PP
-[
-.B fsys
-.I name
-]
-.B unhalt
-.PP
-[
-.B fsys
-.I name
-]
-.B vac
-.I dir
-.PP
-[
-.B fsys
-.I name
-]
-.B wstat
-.I file
-.I elem
-.I uid
-.I gid
-.I perm
-.I length
-.SH DESCRIPTION
-These are configuration and maintenance commands
-executed at the console of a 
-.IR fossil (4)
-file server.
-The commands are split into three groups above:
-file server configuration,
-file system configuration,
-and file system maintenance.
-This manual page is split in the same way.
-.SS File server configuration
-.PP
-The
-dot
-.RI ( . )
-command
-reads
-.IR file ,
-treating each line as a command to be executed.
-Blank lines and lines beginning with a 
-.L #
-character are ignored.
-Errors during execution are printed but do not stop the script.
-Note that
-.I file
-is a file in the name space in which
-.I fossil
-was started,
-.I not
-a file in any file system served by
-.IR fossil .
-.PP
-.I 9p
-executes a 9P transaction; the arguments
-are in the same format used by
-.IR 9pcon (8).
-.PP
-.I Bind
-behaves similarly to
-.IR bind (1).
-It is useful when fossil
-is started without devices it needs configured
-into its namespace.
-.PP
-.I Dflag
-toggles the debug flag and prints the new setting.
-When the debug flag is set, all protocol messages
-and information about authentication is printed to
-standard error.
-.PP
-.I Echo
-behaves identically to
-.IR echo (1),
-writing to the console.
-.PP
-.I Listen
-manages the network addresses at which
-fossil is listening.
-With no arguments,
-.I listen
-prints the current list of addresses and their network directories.
-With one argument, listen
-.I address
-starts a new listener at
-.IR address ;
-the
-.B -d
-flag causes 
-.I listen
-to remove the listener
-at the given address.
-By default, the user
-.I none
-is only allowed to attach on a connection after
-at least one other user has successfully attached.
-The
-.B -N
-flag allows connections from
-.I none
-at any time.
-The
-.B -I
-flag causes
-.I fossil
-to check the IP address of incoming connections
-against
-.BR /mnt/ipok ,
-rejecting attaches from disallowed addresses.
-This mechanism is not intended for general use.
-The server
-.I sources.cs.bell-labs.com
-uses it to comply with U.S. crytography
-export regulations.
-.PP
-.I Msg
-prints the maximum internal 9P message queue size
-and the maximum number of 9P processes to
-allocate for serving the queue.
-The
-.B -m
-and
-.B -p
-options set the two variables.
-.PP
-.I Printconfig
-prints the
-.B config
-line for each configured file system
-and prints the
-.B venti
-line, if any, used to configure this file server.
-.PP
-.I Srv
-behaves like listen but uses
-.BI /srv/ name
-rather than a network address.
-With the
-.B -p
-flag, 
-.I srv 
-edits a list of console services rather than 9P services.
-With no arguments,
-.I srv
-prints the current list of services.
-With one argument, srv
-.I name
-starts a new service at
-.IR /srv/name ;
-the
-.B -d
-flag causes 
-.I srv
-to remove the named service.
-See the
-.I [fsys] open
-command below for a description of the
-.B -APW
-options.
-.PP
-.I Uname
-manipulates entries in the user table.
-There is no distinction between users and groups:
-a user is a group with one member.
-For each user, the user table records:
-.TP
-.I id
-the string used to represent this user in the on-disk structures
-.TP
-.I name
-the string used to represent this user in the 9P protocol
-.TP
-.I leader
-the group's leader (see
-.IR stat (5)
-for a description of the special privileges held by a group leader)
-.TP
-.I members
-a comma-separated list of members in this group
-.PP
-The
-.I id
-and
-.I name
-are usually the same string, but need not be.
-Once an
-.I id
-is used in file system structures archived to Venti,
-it is impossible to change those disk structures,
-and thus impossible to rename the
-.IR id .
-The translation from
-.I name
-to
-.I id
-allows the appearance of renaming the user even
-though the on-disk structures still record the old name.
-(In a conventional Unix file system, the
-.I id
-is stored as a small integer rather than a string.)
-.I Leader
-and
-.I members
-are names, not ids.
-.PP
-The first argument to
-.I uname
-is the
-.I name
-of a user.
-The second argument is a verb, one of:
-.TP
-.I id
-create a user with name
-.RI ` name '
-and id
-.RI ` id ;'
-also create a home directory
-.BI /active/usr/ uname \fR
-.TP
-.BI : id
-create a user with name
-.RI ` name '
-and id
-.RI ` id ,'
-but do not create a home directory
-.TP
-.BI % newname
-rename user
-.RI ` name '
-to
-.RI ` newname ,'
-throughout the user table
-.TP
-.BI = leader
-set
-.IR name 's
-group leader
-to
-.IR leader .
-.TP
-.BI =
-remove
-.IR name 's
-group leader; then all members will be
-considered leaders
-.TP
-.BI + member
-add
-.I member
-to
-.IR name 's
-list of members
-.TP
-.BI - member
-remove
-.I member
-from
-.IR name 's
-list of members
-.LP
-If the verb is omitted, the entire entry for
-.I name
-is printed, in the form
-`\fIid\fL:\fIname\fL:\fIleader\fL:\fImembers\fR.'
-.LP
-The end of this manual page gives examples.
-.PP
-.I Users
-manipulates the user table.
-The user table is a list of lines in the form printed
-by the
-.I uname
-command.
-The
-.B -d
-flag resets the user table with the default:
-.IP
-.EX
-adm:adm:adm:sys
-none:none::
-noworld:noworld::
-sys:sys::
-glenda:glenda:glenda:
-.EE
-.PP
-Except
-.BR glenda ,
-these users are mandatory: they must appear in all user
-files and cannot be renamed.
-.PP
-The
-.B -r
-flag reads a user table from the named
-.I file
-in file system
-.BR main .
-The
-.B -w
-flag writes the table to
-.B /active/adm/users
-on the file system
-.BR main .
-.B /active/adm
-and
-.B /active/adm/users
-will be created if they do not exist.
-.PP
-.I Users
-.B -r
-.B /active/adm/users
-is automatically executed when the file system
-.B main
-is opened.
-.PP
-.I Users
-.B -w
-is automatically executed after each change to the user
-table by the
-.I uname
-command.
-.PP
-.I Who
-prints a list of users attached to each active connection.
-.SS File system configuration
-.I Fsys
-sets the current file system to
-.IR name ,
-which must be configured and open (q.v.).
-The current file system name is
-displayed as the file server prompt.
-The special name
-.B all
-stands for all file systems;
-commands applied to
-.B all
-are applied to each file system in turn.
-The commands
-.BR config ,
-.BR open ,
-.BR venti ,
-and
-.B close
-cannot be applied to
-.BR all .
-.PP
-.I Fsys
-takes as an optional argument
-(after
-.BR name )
-a command to execute on the named file system.
-Most commands require that the named file system
-be configured and open; these commands can be invoked
-without the
-.BI fsys " name
-prefix, in which case the current file system is used.
-A few commands
-.RB ( config ,
-.BR open ,
-and
-.BR unconfig )
-operate on unopened file systems; they require the prefix.
-.PP
-.I Config
-creates a new file system named
-.I name
-using disk file
-.I device .
-This just adds an entry to fossil's internal table.
-.PP
-.I Venti
-establishes a connection to the Venti server
-.I host
-(by default, the environment variable
-.B $venti
-or the network variable
-.BR $venti )
-for use by the named file system.
-If no
-.I venti
-command is issued before
-.IR open ,
-the default Venti server will be used.
-If the file system is open,
-and was not opened with the
-.B -V
-flag,
-the command redials the Venti server.
-This can be used to reestablish broken connections.
-It is not a good idea to use the command to switch
-between Venti servers, since Fossil does not keep track
-of which blocks are stored on which servers.
-.PP
-.I Open
-opens the file system, reading the
-root and super blocks and allocating an in-memory
-cache for disk and Venti blocks.
-The options are:
-.TP
-.B -A
-run with no authentication
-.TP
-.B -P
-run with no permission checking
-.TP
-.B -V
-do not attempt to connect to a Venti server
-.TP
-.B -W
-allow wstat to make arbitrary changes to the user and group fields
-.TP
-.B -r
-open the file system read-only
-.TP
-.BI -c " ncache
-allocate an in-memory cache of 
-.I ncache
-(by default, 1000)
-blocks
-.PP
-The
-.I -APW
-settings can be overridden on a per-connection basis
-by the
-.I srv
-command above.
-.PP
-.I Close
-flushes all dirty file system blocks to disk
-and then closes the device file.
-.PP
-.I Unconfig
-removes the named file system (which must be closed)
-from fossil's internal table.
-.SS File system maintenance
-.I Bfree
-marks the block at disk address
-.I addr
-as available for allocation.
-Before doing so, it prints a
-.I label
-command (q.v.)
-that can be used to restore the block to its previous state.
-.PP
-.I Block
-displays (in hexadecimal)
-the contents of the block at disk address
-.IR addr ,
-starting at
-.I offset
-and continuing for
-.I count
-bytes or until the end of the block.
-If 
-.I data
-(also hexadecimal)
-is given, the contents in that range are
-replaced with data.
-When writing to a block,
-.I block
-prints the old and new contents,
-so that the change is easily undone.
-Editing blocks is discouraged.
-.PP
-.I Clre
-zeros an entry from a disk block.
-Before doing so, it prints a
-.I block
-command that can be used 
-to restore the entry.
-.PP
-.I Clri
-removes the internal directory entry
-and abandons storage associated with
-.IR files .
-It ignores the usual rules for sanity, such as checking against
-removing a non-empty directory.
-A subsequent
-.I flchk
-(see
-.IR fossil (4))
-will identify the abandoned storage so it can be reclaimed with
-.I bfree
-commands.
-.PP
-.I Clrp
-zeros a pointer in a disk block.
-Before doing so, it prints a 
-.I block
-command that can be used to restore the entry.
-.PP
-.I Check
-checks the file system for various inconsistencies.
-If the file system is not already halted, it is halted for
-the duration of the check.
-If the archiver is currently sending a snapshot to Venti,
-the check will refuse to run; the only recourse is to wait
-for the archiver to finish.
-.PP
-A list of keyword options control the check.
-The
-.BR pblock ,
-.BR pdir ,
-and
-.B pfile
-options cause 
-.I check
-to print the name of each block, directory, or file encountered.
-.PP
-By default,
-.I check
-reports errors but does not fix them.
-The
-.BR bclose ,
-.BR clri ,
-.BR clre ,
-and
-.B clrp
-options specify correcting actions that may be taken:
-closing leaked blocks, clearing bad file directory entries,
-clearing bad pointers, and clearing bad entries.
-The
-.B fix
-option enables all of these; it is equivalent to
-.B bclose
-.B clri
-.B clre
-.BR clrp .
-.PP
-By default,
-.I check
-scans the portion of the active file system held in the write buffer,
-avoiding blocks stored on Venti or used only in snapshots.
-The
-.B venti
-option causes
-.I check
-to scan the portion of the file system stored on Venti,
-and the
-.B snapshot
-option causes
-.I check
-to scan old snapshots.
-Specifying
-.B snapshot
-causes
-.I check
-to take a long time;
-specifying
-.B venti
-or
-(worse)
-.B venti
-.B snapshot
-causes
-.I check
-to take a very long time.
-.PP
-.I Create
-creates a file on the current file system.
-.I Uid
-and
-.I gid
-are uids
-.RI ( not
-unames;
-see the discussion above, in the description
-of the 
-.I uname
-command).
-.I Perm
-is the low 9 bits of the permission mode of the file,
-in octal.
-The 
-.BR a ,
-.BR d ,
-and
-.B l
-mode prefixes
-set the append-only, directory, and lock bits.
-The
-.I perm
-is formatted as described in the
-.I stat
-command;
-creating files or directories with the
-.BR snapshot (s)
-bit set is not allowed.
-.PP
-.I Df
-prints the amount of used disk space in the write buffer.
-.PP
-.I Epoch
-sets the low file system epoch.
-Snapshots in the file system are given increasing epoch numbers.
-The file system maintains a low and a high epoch number,
-and only allows access to snapshots in that range.
-The low epoch number can be moved forward to discard old snapshots
-and reclaim the disk space they occupy.
-(The high epoch number is always the epoch of the currently
-active file system.)
-.PP
-With no argument
-.I epoch
-reports the current low and high epoch numbers.
-The command
-``\fLepoch\fI n''\fR
-is used to propose changing the low epoch to
-.IR n .
-In response, 
-.I fossil
-scans
-.B /archive
-and
-.B /snapshot
-for snapshots that would be discarded, printing their
-epoch numbers and the
-.I clri
-commands necessary to remove them.
-The epoch is changed only if no such paths are found.
-The usual sequence of commands is (1) run epoch to
-print the snapshots and their epochs, (2) clri some snapshots,
-(3) run epoch again.
-If the file system is completely full (there are no free blocks),
-.I clri
-may fail because it needs to allocate blocks.
-For this situation,
-the
-.B -y
-flag to epoch forces the epoch change even when
-it means discarding currently accessible snapshots.
-Note that when there are still snapshots in
-.BR /archive ,
-the archiver should take care
-of those snapshots (moving the blocks from disk to Venti)
-if you give it more time.
-.PP
-The
-.B -r
-flag to epoch causes it to remove any now-inaccessible
-snapshot directories once it has changed the epoch.
-This flag only makes sense in conjunction with the
-.B -y
-flag.
-.PP
-.I Epoch
-is a very low-level way to retire snapshots.
-The preferred way is by setting an automatic timer
-with
-.IR snaptime .
-.PP
-.I Halt
-suspends all file system activity;
-.I unhalt
-resumes activity.
-.PP
-.I Label
-displays and edits the label associated with a block.
-When editing, a parameter of
-.B -
-means leave that field unchanged.
-Editing labels is discouraged.
-.PP
-.I Remove
-removes
-.IR files .
-.PP
-.I Snap
-takes a temporary snapshot of the current file system,
-recording it in 
-.BI /snapshot/ yyyy / mmdd / hhmm \fR,
-as described in 
-.IR fossil (4).
-The
-.B -a
-flag causes 
-.I snap
-to take an archival snapshot, recording it in
-.BI /archive/ yyyy / mmdd \fR,
-also described in
-.IR fossil (4).
-By default the snapshot is taken of
-.BR /active ,
-the root of the active file system.
-The 
-.B -s
-flag specifies a different source path.
-The
-.B -d
-flag specifies a different destination path.
-These  two flags are useful together for moving snapshots into
-the archive tree.
-.PP
-.I Snapclean
-immediately discards all snapshots that are more than
-.I timeout
-minutes old.
-The default timeout is the one set by the
-.I snaptime
-command.
-The discarding is a one-time event rather than
-a recurring event as in
-.IR snaptime .
-.PP
-.I Snaptime
-displays and edits the times at which snapshots are automatically
-taken.
-An archival snapshot is taken once a day, at
-.IR hhmm ,
-while temporary snapshots are taken at multiples of
-.I interval
-minutes.
-Temporary snapshots are discarded after they are
-.I timeout
-minutes old.
-The snapshot cleanup runs every
-.I timeout
-minutes or once a day, whichever is more frequent,
-so snapshots may grow to an age of almost twice the timeout
-before actually being discarded.
-With no arguments,
-.I snaptime
-prints the current snapshot times.
-The
-.B -a
-and
-.B -s
-options set the archive and snapshot times.
-An
-.I hhmm
-or
-.I interval
-of
-.L none
-can be used to disable that kind of automatic snapshot.
-The
-.B -t
-option sets the snapshot timeout.
-If
-.I timeout
-is
-.LR none ,
-temporary snapshots are not automatically discarded.
-By default, all three times are set to
-.LR none .
-.PP
-.I Stat
-displays metadata for each of the named
-.IR files ,
-in the form:
-.IP
-.EX
-stat \fIfile elem uid gid perm length
-.EE
-.LP
-(Replacing
-.B stat
-with
-.B wstat
-yields a valid command.)
-The
-.I perm
-is an octal number less than or equal to 777,
-prefixed with any of the following letters
-to indicate additional bits.
-.IP
-.EX
-.ta +4n
-a	\fRappend only
-d	\fRdirectory
-l	\fRexclusive use
-s	\fRis the root of a snapshot
-t	\fRtemporary bit
-A	\fRMS-DOS archive bit
-G	\fRsetgid
-H	\fRMS-DOS hidden bit
-L	\fRsymbolic link
-S	\fRMS-DOS system bit
-U	\fRsetuid
-Y	\fRsticky
-.EE
-.PP
-The bits denoted by capital letters are included
-to support non-Plan 9 systems.
-They are not made visible by the 9P protocol.
-.PP
-.I Sync
-writes dirty blocks in memory to the disk.
-.PP
-.I Vac
-prints the Venti score for a
-.IR vac (1)
-archive containing the tree rooted
-at
-.IR dir ,
-which must already be archived to Venti
-(typically
-.IR dir
-is a directory in the
-.B /archive
-tree).
-.PP
-.I Wstat
-changes the metadata of the named
-.IR file .
-Specifying
-.B -
-for any of the fields means ``don't change.''
-Attempts to change the
-.B d
-or
-.B s
-bits in the
-.I perm
-are silently ignored.
-.SH EXAMPLES
-.IR Sources ,
-the Plan 9 distribution file server,
-uses the following configuration file:
-.IP
-.EX
-srv -p fscons.sources
-srv -p fscons.sources.adduserd
-srv sources
-fsys main config /dev/sdC0/fossil.outside
-fsys main open -c 25600
-fsys main
-users /active/adm/users
-listen tcp!*!564
-msg -m 40 -p 10
-snaptime -a 0000 -s 15
-.EE
-.LP
-The second console is used by the daemon
-that creates new accounts.
-.PP
-To add a new user with
-.I name
-and
-.I id
-.B rob
-and create his home directory:
-.IP
-.EX
-uname rob rob
-.EE
-.PP
-To create a new group
-.B sys
-(with no home directory)
-and add
-.B rob
-to it:
-.IP
-.EX
-uname sys :sys
-uname sys +rob
-.EE
-.PP
-To save an old (but not yet discarded) snapshot into the archive tree:
-.IP
-.EX
-snap -a -s /snapshot/2003/1220/0700 -d /archive/2003/1220
-.EE