dbrow - select rows from an Fsdb file based on arbitrary conditions
dbrow [-vw] CONDITION [CONDITION...]
Select rows for which all CONDITIONS are true. Conditions are specified as Perl code, in which column names are be embedded, preceded by underscores.
Invert the selection, picking rows where at least one condition does not match.
This module also supports the standard fsdb options:
Enable debugging output.
Enable warnings in user supplied code.
Read from InputSource, typically a file name, or - for standard input, or (if in Perl) a IO::Handle, Fsdb::IO or Fsdb::BoundedQueue objects.
-
Write to OutputDestination, typically a file name, or - for standard output, or (if in Perl) a IO::Handle, Fsdb::IO or Fsdb::BoundedQueue objects.
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.
--(no)autorun
Use H as the full Fsdb header, rather than reading a header from then input.
Show help.
Show full manual.
#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
cat DATA/passwd.fsdb | dbrow '_fullname =~ /John/'
#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
Doesn't detect references to unknown columns in conditions.
END #' for font-lock mode. exit 1;
$filter = new Fsdb::Filter::dbrow(@arguments);
Create a new dbrow object, taking command-line arguments.
$filter->set_defaults();
Internal: set up defaults.
$filter->parse_options(@ARGV);
Internal: parse command-line arguments.
$filter->setup();
Internal: setup, parse headers.
$filter->run();
Internal: run over each rows.
Copyright (C) 1991-2018 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.
To install Fsdb, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Fsdb
CPAN shell
perl -MCPAN -e shell install Fsdb
For more information on module installation, please visit the detailed CPAN module installation guide.