Dbrow (1) Linux Manual Page

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, preceded 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.

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AUTHOR and COPYRIGHT

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

dbrow (1) Linux Manual Page