#!/usr/bin/perl -w

#
# dbcoltype.pm
# Copyright (C) 2022 by John Heidemann <johnh@isi.edu>
#
# This program is distributed under terms of the GNU general
# public license, version 2.  See the file COPYING
# in $dblibdir for details.
#


=head1 NAME

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

=head1 SYNOPSIS

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

=head1 DESCRIPTION

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

The data does not change (just the header).

=head1 OPTIONS

=over 4

=item B<-v> or B<--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).

=back

=for comment
begin_standard_fsdb_options

and the standard fsdb options:

=over 4

=item B<-d>

Enable debugging output.

=item B<-i> or B<--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.

=item B<-o> or B<--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.

=item B<--autorun> or B<--noautorun>

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

=item B<--header> H

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

=item B<--help>

Show help.

=item B<--man>

Show full manual.

=back

=for comment
end_standard_fsdb_options


=head1 SAMPLE USAGE

=head2 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

=head2 Command:

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

=head2 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


=head1 SEE ALSO

L<dbcoldefine(1)>,
L<dbcolcreate(1)>,
L<Fsdb(3)>.


=cut


# WARNING: This code is derived from dbcoltype.pm; that is the master copy.

use Fsdb::Filter::dbcoltype;
my $f = new Fsdb::Filter::dbcoltype(@ARGV);
$f->setup_run_finish;  # or could just --autorun
exit 0;


=head1 AUTHOR and COPYRIGHT

Copyright (C) 2022 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.

=cut

1;