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showtable (1)
>> showtable (1) ( Linux man: Команды и прикладные программы пользовательского уровня )
NAME
showtable - Show data in nicely formatted columns
USAGE
showtable [-options] [file]
DESCRIPTION
Showtable reads an input data stream and displays it in a nicely
formatted listing, with exact formatting depending upon the options.
The input stream, file or "STDIN" by default should consist of data
separated by tabs or the defined separator character (see -d).
The actual output formatting is peformed by the ShowTable module.
OPTIONS
There are two general sets of options: those which help determine the format of the
input, and those which determine the format of the output.
Options affecting input
-break=str
Set the inter-column break string to "str``. The default
is a tab (''"\t""). If -strip is also given, blanks surrounding
the break string will also be ignored.
-dstr
This is the same as "-break="str.
-nod(ashes)
Do not ignore lines of separators, such as dashes, equal
signs, or underlines. If -nodashes is given, and these lines do occur
in the stream, they will be treated as normal data.
-ti(tles)[=NN]
Treat the first NN rows of data as column titles; multiple
words in the column titles may wrap vertically. If NN is
omitted, it defaults to 1. No -titles option is the same
as -titles=0.
-in(put)=type
Set the input type as type, which can be one of: box, list, table,
or simple. A simple-type table is the same as a table-type,
but no wrapping characters are recognized.
-s(trip)
Strip blanks from around the column values.
-nos(trip)
Do not strip blanks from the input. Useful if there is formatted or aligned
data within a boxed table.
Options affecting output
-t(able)
Use a table format for output, with wrapping of column values longer
than the given or determined column widths. See the ShowTable manpage for
more details.
-si(mple)
Use a simple table format, without any wrapping of column values.
See the ShowTable manpage for more details.
-l(ist)
Use a list style format. See the ShowTable manpage for more details.
-b(ox)
Use a ``boxed'' style table. See the ShowTable manpage for more details.
-ht(ml)
Use HTML-formating. See the ShowTable manpage for more details.
-ti(tles)=name1,name2,...,nameN
Define the column names explicitly. This is useful for naming columns
of data from "STDIN", when showtable is being used as a filter. The
first column name, name1, cannot begin with a digit. This option
allows any column titles obtained from the input to be overridden.
-noh(eaders)
Do not output any headers on the tables; -titles=0 implies this option.
-fn1[,n2, ..., nN]
Select fields numbered n1, n2, etc., to display. Each nN is a
field index, or a range of indexes in the form: "N"-"M" The default
is to show all the fields in each row. Fields are numbered from 1. An
example: to show the first, and three through five fields of the
"/etc/passwd" file:
showtable -d: -f1,2-5 /etc/passwd
-fields=fname1[,fname2, ..., fnameN]
Select the named fields to display. The field names must be available, either
through the data stream, or by using the -titles option. The field
names given must match the existing field names exactly.
Using the file "/etc/passwd" for another example: to show the same first two
fields, by name:
Set the maximum table width. This value is applied to the variable
the Data::Showtable::Max_Table_Width manpage. When the total width of all
columns to be displayed exceeds this value, all column widths are scaled
uniformly.
If -width is not given, then for all output but -html, the default
value is either ""COLUMNS"", if defined, or 80, if not. Whith -html
mode, there is no default value for -width; in other words, there is
no limit to the width.
-cw(idths)=w1[,w2,...,wN]
Set individual column widths to the specified values. Empty column
widths imply no maximum width. If the -width option is also given,
then the -cwidth column widths can also be given as fractions or
percentages.
Example: To set the maximum width of the third column to 20 characters:
-cw=,,20
HTML-only options (the usage of which implies -html)
-noe(scape)
Do not perform HTML escape sequences on the data; this allows embedded
HTML text in the data to be displayed properly with the -html option.
-attributes='attr1attr2 ...'
Declare the table attributes, which are inserted into the "TABLE"
token. For example, the option:
Set the HTML formats for the column titles. The -title_formats (or
just -tf) can be given multiple times, for each column, or formats
for multiple columns can be given on the same option separated by
semi-colons "";"".
Each fmtN can itself be multiple HTML items, separated by commas.
Each HTML element can be given either as an HTML token (eg:
""\<BOLD\">``), or as a plain name (eg: ''"BOLD"").
For example, here is a title format specification for three columns,
where the first column title should be bold italic, the second italic,
and the third italic in a smaller font:
-tf='BOLD,I;I;<FONT SIZE=-2>,I'
-d(ata)_f(formats)=fmt1;fmt2;...;fmtN
The same as -title_formats but applies to the column data.
-url(s)=col1=url1,col2=url2,...
Define a mapping from column names, or indexes, to URLs to be inserted
as <A HREF's> around the values for the named columns. Each colN is
a column name or index, and each urlN is a string representing the
URL to be inserted for the given column.
The URL text may contain these substitution strings:
%K - will be substituted with the current column name (or key).
%V - will be substituted with the current column value.
Multiple -url options may be given, if desired, rather than
creating one long argument for a single -url. For example:
If the input type is box, then vertical and horizontal box characters
are removed from the input stream, and blanks surrounding the vertical
box characters are removed. The vertical box characters (column
separaters) are ""|"`` or ''":"``. The The horizontal box characters are
''"+"`` and ''"-"".
Morever, data wrapped within a column is recognized and parsed as one
column value, by recognizing the presence of a wrapping prefix or
wrapping suffix character. Currently, the wrapping prefix character
is ``<'', and the wrapping suffix character is ``>''.
An example of data wrapped within a column is given here. The table
below has just two logical rows of data; with both rows having data
wrapped into multiple physical rows.
+---------+---------+---------+
| Col 1 | Col 2 | Col 3 |
+---------+---------+---------+
| This is>| Another>| Row 1,3>|
|< a cont>|< value. |<is also>|
|<inued >| |<long. |
|<value. | | |
|This is >| Item2-2 | Item2-3 |
+---------+---------+---------+
List Format
When using the -list or -input=list options, either, or both, the
input and output may be in a ``list'' format, which is implemented
using the following syntax:
Each row of data consists of one or more columns, and ends with
a blank line.
Each column consists of a column name, followed by a colon ``:'',
followed by an optional, single space or tab, followed by the
column value, on the same line.
Continuation lines of the previous column value consist of one or more
space or tab characters, a colon ``:'', one optional, single space
or tab, followed by the continuation value. In the example above,
The second column value of the second row was continued.
HTML Input with HTML Output
When using -html on data already containing HTML-formatted text,
the -noescape option should be used. By default, all input
text is assumed not to be HTML-formatted, and is escaped
allowing embedded ``<'', ``>'' characters, if any, to be displayed
correctly.
Currently, the box formatting characters are not configurable: '+' for
the corners; '-' and '|' for the tops and sides, respectively. In an
ideal world, these things would be configurable.
*
The continuation prefix and suffix characters, '<' and '>',
respectively, are also not configurable:
*
When reading table input, any data ending with ``>'' will
be considered to be continued by the next row of data. To avoid
this, use -input=simple.
*
When selecting noncontiguous fields (ie: -f1,4>) without
field names, the default field names will be consecutively
numbered from 1, which is counter-intuitive to the original
selection. To avoid this, name the fields using the -title=...
option.
