# Licensed under the GPL v2. For licencing details see COPYING.
package "adu"
-version "0.0.2"
-purpose "advanced disk usage
+purpose "
adu creates a database containing disk usage statistics of a given
directory. It allows to query that database to quickly retrieve
configuration file. As usual, if an option is given both at
the command line and in the configuration file, the command
line option takes precedence.
-
"
-option "database-dir" d
-#~~~~~~~~~~~~~~~~~~~~~~
-"directory containing the osl tables"
-string typestr="path"
-required
-details="
- Full path to the directory containing the osl tables. This
- directory must exist. It must be writable for the user running
- adu in --create mode and readable in --select mode.
-
-"
option "loglevel" l
#~~~~~~~~~~~~~~~~~~
"Set loglevel (0-6)"
int typestr="level"
-default="3"
+default="4"
optional
details="
Log messages are always written to stderr while normal output
goes to stdout. Lower values mean more verbose logging.
"
-option "uid" u
-#~~~~~~~~~~~~~
-"user id(s) to take into account"
-string typestr="uid_spec"
-optional
-multiple
-details="
- An uid specifier may be a single number, or a range of uids.
- Example:
-
- --uid 42 # only consider uid 42
- --uid 42- # only consider uids greater or equal than 42
- --uid 23-42 # only consider uids between 23 and 42, inclusively.
+defgroup "database"
+#==================
+groupdesc="
+ There are two ways to specify a database directory. You can either
+ specify a full path using the database-dir option or a root path
+ using the database-root option. In the latter case, a directory
+ structure matching that of the base-dir argument is created
+ below the given full path.
- This option may be given multiple times. An uid is taken into
- account if it satisfies at least one --uid option.
+ The advantage of using database-root is that the base-dir is
+ used to find the relevant database both in create and select mode
+ and you do not have to care for setting the database-dir explicitly.
"
+groupoption "database-dir" d
+#~~~~~~~~~~~~~~~~~~~~~~~~~~~
+"directory containing the osl tables"
+group="database"
+string typestr="path"
+details="
+ Full path to the directory containing the osl tables. This
+ directory is created if it does not exist. It must be writable for the
+ user running adu in --create mode and readable in --select mode.
+"
-option "paths" p
-#~~~~~~~~~~~~~~~
-"files to take into account"
-string typestr="pattern"
+groupoption "database-root" r
+#~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+"directory containing directories containing the osl tables"
+group="database"
+string typestr="path"
+default="/var/lib/adu"
+dependon="base-dir"
optional
details="
- Shell wildcard pattern that must match a file in order to be
- included in the database in --create mode or in the output
- for --select mode. Only the part of the filename below the
- base directory is matched against the pattern. The default
- is to take all files into account. See fnmatch(3) for details.
+ Base path to the directory containing the osl tables. The real
+ database-dir is generated by appending base-dir. This
+ directory is created if it does not exist. When used in select
+ mode you have to specify the base-dir as well.
"
###############
defgroup "mode"
#==============
groupdesc="
- adu may be started in one of two possible modes, each of which
- corresponds to a different command line option. Exactly one
- of these options must be given.
-
+ adu may be started in one of three possible modes, each of
+ which corresponds to a different command line option. Exactly
+ one of these options must be given.
"
required
"Create a new database"
group="mode"
details="
- Traverse the given directory and track disk user on a per-user
- basis. Results are stored in N + 1 osl tables where N is
- the number of uids that own at least one regular file in
- that directory.
+ Traverse the given directory and track disk usage on a
+ per-user basis. Results are stored in N + 1 osl tables where
+ N is the number of uids that own at least one regular file
+ in that directory.
+"
+
+groupoption "interactive" I
+#~~~~~~~~~~~~~~~~~~~~~~~~~~
+"activate interactive mode"
+group="mode"
+details="
+ In this mode, adu reads commands from stdin. This makes it
+ possible to run different select queries without opening the
+ underlying osl database for each query (which is expensive).
+
+ In interactive mode, several subcommands are available, see
+ the end of this document.
"
groupoption "select" S
"query a database previously created with --create"
group="mode"
details="
- This option prints statistics about matching subdirectories to
- stdout. The output depends on the other options, see below.
+ This option prints statistics about matching subdirectories
+ to stdout, to an output file or pipes the output to a given
+ command, depending on the --output option. The output format
+ can be customized by specifying select options, see below.
"
##############################
#~~~~~~~~~~~~~~~~~~
"directory to traverse"
string typestr="path"
-dependon="create"
optional
details="
- The base directory to be traversed recursively. Must be
- given if --create mode was selected. A warning message is
- printed for each subdirectory that could not be read because
- of insufficient permission. These directories will be ignored
- when computing statistics.
+ The base directory to be traversed recursively. A warning
+ message is printed for each subdirectory that could not be
+ read because of insufficient permissions. These directories
+ will be ignored when computing statistics.
"
option "one-file-system" x
flag off
dependon="create"
details="
- Skip directories that are on different filesystems from the
+ Skip directories that are on different file systems from the
one that the argument being processed is on.
"
users. Decreasing the value causes adu to use slightly less memory.
"
-
-##############################
-section "Options for --select"
-##############################
-
-option "limit" L
-#~~~~~~~~~~~~~~~
-"Limit output"
-int typestr="num"
-default="-1"
-optional
-dependon="select"
-details="
- Only print num lines of output. If negative (the default),
- print all lines.
-"
-
-option "size-unit" -
-#~~~~~~~~~~~~~~~~~~~
-"select output format for sizes"
-enum typestr="format"
-values="h","b","k","m","g","t"
-default="h"
-optional
-dependon="select"
-details="
- Print sizes in the given unit: human-readable, bytes,
- kilobytes (2^10), megabytes (2^20), gigabytes (2^30), terabytes
- (2^40). The default is \"h\", i.e. human-readable.
-"
-
-option "count-unit" -
-#~~~~~~~~~~~~~~~~~~~~
-"select output format for counted values"
-enum typestr="format"
-values="h","n","k","m","g","t"
-default="h"
+option "bloom-filter-order" B
+#~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+"use bloom filters for hard link detection"
+int typestr="order"
+dependon="create"
+default="23"
optional
-dependon="select"
details="
- Print the number of files/directories in the given unit:
- human-readable, number, number/10^3, number/10^6, number/10^12,
- number/10^15. The default is to print numbers in human-readable
- format.
-"
+ Allocate bloom filters of size 2^order bits. Each regular
+ file with hard link count greater than one is added to these
+ filters which allows to detect hard links on a per-user basis.
+ Greater values reduce the probability of false positives but
+ require more memory.
-option "print-base-dir" -
-#~~~~~~~~~~~~~~~~~~~~~~~~
-"whether to include the base-dir in the output"
-flag off
-details="
- If this flag is given, all directories printed are prefixed
- with the base directory. The default is to print paths relative
- to the base dir.
+ Values less than 10 deactivate this feature so that no hard
+ links are being detected.
"
-option "no-headers" -
-#~~~~~~~~~~~~~~~~~~~~
-"supress descriptions for listings/tables"
-flag off
-dependon="select"
-details="
- This is mostly useful to feed the output of adu to scripts.
-"
-
-option "global-list" -
-#~~~~~~~~~~~~~~~~~~~~~
-"how to print global directory listings"
-enum typestr="which"
-values="size","file_count","both","none"
-default="both"
-optional
-dependon="select"
-details="
- By default adu prints two global directory listings: The
- first prints the directory names ordered by the sum of the
- sizes of the contained files while the second listing prints
- them sorted by the number of files. This option can be used
- to print only one or neither of these two listings.
-"
-
-option "no-global-summary" -
-#~~~~~~~~~~~~~~~~~~~~~~~~~~~
-"do not print the summary line"
-flag off
-dependon="select"
-
-option "user-list" -
-#~~~~~~~~~~~~~~~~~~~
-"how to print per-user directory listings"
-enum typestr="which"
-values="size","file_count","both","none"
-default="both"
+option "num-bloom-filter-hash-functions" N
+#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+"number of hash functions for the bloom filters"
+int typestr="num"
+dependon="create"
+default="10"
optional
-dependon="select"
details="
- Similar to the global directory listings mentioned above,
- adu can print two directory listings per user. This option
- controls which of the these should be printed.
+ Cause each entry which is added to the bloom filter to set
+ \"num\" bits of the bloom filter.
"
-option "no-user-summary" -
-#~~~~~~~~~~~~~~~~~~~~~~~~~~~
-"do not print the user summary table"
-flag off
-dependon="select"
-
+##############################
+section "Options for --select"
+##############################
-option "user-summary-sort" -
-#~~~~~~~~~~~~~~~~~~~~~~~~~~~
-"how to sort the user-summary"
-enum typestr="col_spec"
-values="name","uid","dir_count","file_count","size"
-default="size"
+option "select-options" s
+#~~~~~~~~~~~~~~~~~~~~~~~~~
+"Options for select mode"
+string typestr="<options>"
optional
dependon="select"
details="
- It is enough to specify the first letter of the column specifier,
- e.g. \"--user-summary-sort f\" sorts by file count.
+ This option takes a string whose content is another set of
+ options as described below. Select options may be specified
+ either directly in select mode, in which case you have use
+ quotes to prevent the select options from being interpreted
+ as adu options, or via the \"set\" command in interactive mode.
"
projects / adu.git / blobdiff