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

NOTE: this page was directly converted from the perl FSDB manual pages from FSDB version 3.1

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.

--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 | 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;