dbcoltype - Man Page

define (or redefine) types for columns of an Fsdb file

Synopsis

dbcol [-v] [column type...]

Description

Define the type of each column, where COLUMN and TYPE are pairs. Or, with the -v option, redefine all types as string.

The data does not change (just the header).

Options

-v or --clear-types

Remove definitions from columns that are listed, or from all columns if none are listed. The effect is to restore types to their default type of “a” (string).

and the standard fsdb options:

-d

Enable debugging output.

-i or --input InputSource

Read from InputSource, typically a file, or - for standard input, or (if in Perl) a IO::Handle, Fsdb::IO or Fsdb::BoundedQueue objects.

-o or --output OutputDestination

Write to OutputDestination, typically a file, or - for standard output, or (if in Perl) a IO::Handle, Fsdb::IO or Fsdb::BoundedQueue objects.

--autorun or --noautorun

By default, programs process automatically, but Fsdb::Filter objects in Perl do not run until you invoke the run() method. The --(no)autorun option controls that behavior within Perl.

--header H

Use H as the full Fsdb header, rather than reading a header from then input.

--help

Show help.

--man

Show full manual.

Sample Usage

Input

    #fsdb account passwd uid gid fullname homedir shell
    johnh * 2274 134 John_Heidemann /home/johnh /bin/bash
    greg * 2275 134 Greg_Johnson /home/greg /bin/bash
    root * 0 0 Root /root /bin/bash
    # this is a simple database

Command

    cat DATA/passwd.fsdb account | dbcoltype uid l gid l

Output

    #fsdb account passwd uid:l gid:l fullname homedir shell
    johnh * 2274 134 John_Heidemann /home/johnh /bin/bash
    greg * 2275 134 Greg_Johnson /home/greg /bin/bash
    root * 0 0 Root /root /bin/bash
    # this is a simple database

See Also

dbcoldefine(1), dbcolcreate(1), Fsdb(3).

Info

2022-07-22 perl v5.36.0 User Contributed Perl Documentation