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

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

SYNOPSIS

dbcol [-v] [column type…]

DESCRIPTION

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

The data does not change (just the header).

OPTIONS

-v or –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).

and the standard fsdb options:

-d

Enable debugging output.

-i or –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.

-o or –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.

–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 account | dbcoltype uid l gid l

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

SEE ALSO

dbcoldefine (1), dbcolcreate (1), Fsdb (3).