/ 
Fsdb-2.29
River stage zero No dependents
/ Fsdb::Filter::dbrow

NAME

dbrow - select rows from an Fsdb file based on arbitrary conditions

SYNOPSIS

dbrow [-vw] CONDITION [CONDITION...]

DESCRIPTION

Select rows for which all CONDITIONS are true. Conditions are specified as Perl code, in which column names are be embedded, preceeded by underscores.

OPTIONS

-v

Invert the selection, picking rows where at least one condition does not match.

This module also supports the standard fsdb options:

-d

Enable debugging output.

-w or --warnings

Enable warnings in user supplied code.

-i or --input InputSource

Read from InputSource, typically a file name, 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 name, 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.

--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 | dbrow '_fullname =~ /John/'

Output:

#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
# this is a simple database
#  | /home/johnh/BIN/DB/dbrow

BUGS

Doesn't detect references to unknown columns in conditions.

END #' for font-lock mode. exit 1;

CLASS FUNCTIONS

new

$filter = new Fsdb::Filter::dbrow(@arguments);

Create a new dbrow object, taking command-line arugments.

set_defaults

$filter->set_defaults();

Internal: set up defaults.

parse_options

$filter->parse_options(@ARGV);

Internal: parse command-line arguments.

setup

$filter->setup();

Internal: setup, parse headers.

run

$filter->run();

Internal: run over each rows.

AUTHOR and COPYRIGHT

Copyright (C) 1991-2007 by John Heidemann <johnh@isi.edu>

This program is distributed under terms of the GNU general public license, version 2. See the file COPYING with the distribution for details.