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ftpquota: tool for ProFTPD mod_quotatab
ftpquota: tool for ProFTPD module mod_quotatab
This program is distributed with the
mod_quotatab module for
ProFTPD 1.2. It is used to create and manage quota tables of type
"file".
The most current version of ftpquota is distributed with the
ProFTPD source code.
Author
Please contact TJ Saunders <tj at castaglia.org> with any
questions, concerns, or suggestions regarding this program.
The following describes the common usage of the ftpquota tool.
The options supported are described in more detail
later.
Creating Tables
To start using mod_quotatab, the two required tables are required.
Tables of type "file" have identifying magic headers such that
ftpquota is needed to initially create both tables. It is an
error to attempt to create a table that already exists:
$ ftpquota --create-table --type=limit
ftpquota: cannot create existing table
To create the initial limit table:
$ ftpquota --create-table --type=limit
To create the initial tally table:
$ ftpquota --create-table --type=tally
The population of a tally table file with the tally for users,
groups, classes, and all is done
automatically by mod_quotatab.
For both of these operations, the --table-path can be used to
create a table in a non-default location.
Updating Tables
Now that you have the initial tables created, but blank, you need to add
records (to the limit table) for the users, groups, classes, etc on which
you, as the administrator, wish to impose quotas.
To a basic limit record for a user bob using the default quotas
(which are all "unlimited" by default):
$ ftpquota --add-record --type=limit --name=bob --quota-type=user
Similarly for quotas of type group or class. Note
that for quotas of type all, the --name option
is not necessary; the all record applies to everyone, regardless
of name or group or class membership. If no byte or file limits are
specified, the default settings (unlimited numbers of bytes/files)
are used.
It is an error to add a record that already exists. Note, however, that it
is possible to have multiple records of the same name, but different
quota types. The record to use for a given session is identified by the
combination of name and quota type.
An example of creating a limit record with more complex quotas for a class
named "browsers"
$ ftpquota --add-record --type=limit --name=browsers --quota-type=class \
--files-upload=0 --files-download=25 --table-path=/usr/local/etc/ftplimit.tab
or, another way:
$ ftpquota --add-record --type=limit --name=browsers --quota-type=class \
--bytes-upload=0 --bytes-download=2 --units=Gb --table-path=/usr/local/etc/ftplimit.tab
In general, it is a good idea to use either byte quotas or file quotas, but
not both, unless you know what you are doing. In these examples, the
--table-path option is used to add the record to a limit table in
a non-default location.
Another option available when creating limit records is the
--per-session option. By default, quotas are persistent, and
apply to the user (or group, class, or everyone) across all sessions. Using
this option means the limits will be enforced only for the duration of
the client's session, and that the limits will apply only to that client.
In other words, using this option for group, class,
or all quotas is not a good idea.
Similarly, for removing records from the limit table (effectively removing
quotas from affecting that user/group/class/all) or from the
tally table (effectively resetting the quotas to zero for that
user/group/class/all), there is the
--delete-record option:
$ ftpquota --delete-record --type=limit --name=browsers --quota-type=class
In addition to adding and removing records, an administrator may want to
simply change the quotas in a given record, either in the limit or tally
tables. In this case, use --update-record:
$ ftpquota --update-record --type=tally --name=bob --quota-type=user \
--bytes-download=100 --files-download=1
This example command manually sets user bob's download tally to
100 bytes, 1 file. It is an error to update a record that does not exist.
There are some administrators who wish to impose quotas on a daily basis, that
is, to have a per-day quota. At present, the easiest way to do this is to
have a cron job that, once a day, does the following:
$ ftpquota --update-record --type=tally --name=name --quota-type=quotatype
This command will "reset" the matching tally record. By default, if
no byte or file quotas are set, the default values are used: unlimited
if updating a limit record, zero if updating a tally record.
When editing the tables, ftpquota will obtain read or write
locks as necessary. If those tables are being used by a running server, which
also performs locking, the script will wait until it is able to obtain a lock.
Changing of in-use table information is ideally done while the server is
quiescent. This locking is to avoid data synchronization and corruption
issues.
Showing Tables
Having tables in binary format makes it difficult to easily see what
the current records are, to double-check limits or simply to view the
current tally. ftpquota thus supports the dumping out of
table contents in human-legible form via the --show-records
option:
$ ftpquota --show-records --type=limit
or, for a tally table not in the location where the scripts expects it to
be:
$ ftpquota --show-records --type=tally --table-path=/usr/local/etc/ftpd/quota-tally.tab
When viewing tables this way, the --units option can be used
to display byte quotas in other units (e.g. Kb, Mb, etc).
The following is the output from running ftpquota --help:
usage: ftpquota [options]
The following options describe the type of operation to be performed:
--add-record Create a new record with the specified limits. Any
limits left unspecified with have their default
values. This option requires the --name and
--quota-type options.
--create-table Create the table if not present. Used to initialize
a table. The default limit table path is
"./ftpquota.limittab". The default tally table path is
"./ftpquota.tallytab".
--delete-record Deletes a quota record from the table. This option
requires the --name and --quote-type options.
--show-records Prints out all of the quota records in the table in
a legible format.
--update-record Updates a quota record with the specified limits. Any
limits left unspecified will be updated with their
default value. This option requires the --name and
--quota-type options.
The following option describes the type of table on which to operate:
--type Specifies a table type to use. The allowable options
are: "limit" or "tally". This is required.
The following options are used to specify specific quota limits:
--Bu Specifies the limit of the number of bytes that may be
--bytes-upload uploaded. Defaults to -1 (unlimited).
--Bd Specifies the limit of the number of bytes that may be
--bytes-download downloaded. Defaults to -1 (unlimited).
--Bx Specifies the limit of the number of bytes that may be
--bytes-xfer transferred. Note that this total includes uploads,
downloads, AND directory listings. Defaults to
-1 (unlimited).
--Fu Specifies the limit of the number of files that may be
--files-upload uploaded. Defaults to -1 (unlimited).
--Fd Specifies the limit of the number of files that may be
--files-download downloaded. Defaults to -1 (unlimited).
--Fx Specifies the limit of the number of files that may be
--files-xfer transferred, including uploads and downloads. Defaults
to -1 (unlimited).
-L Specifies the type of limit, "hard" or "soft", of
--limit-type the bytes limits. If "hard", any uploaded files that
push the bytes used counter past the limit will be
automatically deleted; if "soft", those extra bytes
will be allowed, but future uploads will be denied.
This option only makes sense if --type is "limit".
-N Specifies a name for the quota record. This name
--name will be the user/login name, group name, or class
name, depending on the quota type. This option
is ignored if the quota type specified is "all".
-P
--per-session Specifies that the quota limit is to be applied only
to each session, rather than persisting across
sessions. By default, quotas are persistent.
-Q Specifies a "quota type" for this record, where
--quota-type the type means to which category of FTP users this
quota will apply. The quota type must be one of:
"user", "group", "class", or "all".
The following options are miscellaneous:
--help Displays this message.
--table-path Specifies the path to a quota table file to use.
--units Specifies whether to treats bytes as is, in kilobytes,
megabytes, or gigabytes. Allowable options are:
"B" or "byte", "Kb" or "kilo", "Mb" or "mega",
and "Gb" or "giga". Defaults to "byte".
--verbose Toggles more verbose information about the doings of
the tool as it works.
© Copyright 2000-2002 TJ Saunders
All Rights Reserved
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