First, thank your for your help.

I tried opening "category.def" without any probleme. The content just looks fine.
I even tried to set some different rights on it but it leads me to the same error "bad file descriptor"

I just copy paste you what i got from it :




# -------------
# Links
# -------------
# Links Manager
#
# File: category.def
# Description: Contains the database definition for categories.
# Author: Alex Krohn
# Email: alex@gossamer-threads.com
# Web: http://www.gossamer-threads.com/
# Version: 2.0
#
# (c) 1998 Gossamer Threads Inc.
#
# This script is not freeware! Please read the README for full details
# on registration and terms of use.
# =====================================================================

# Database Definition: CATEGORIES
# --------------------------------------------------------
# Definition of your database file.
# ***************************************** nonenglish modification - begin ****************
# %db_def = (
# ID => [0, 'numer', 5, 8, 1, '', ''],
# Name => [1, 'alpha', 40, 75, 1, '', '^[\w\d/_-]+$'],
# Description => [2, 'alpha', '40x3', 500, 0, '', ''],
# Related => [3, 'alpha', 0, 255, 0, '', ''],
# 'Meta Description' => [4, 'alpha', 40, 75, 0, '', ''],
# 'Meta Keywords' => [5, 'alpha', 40, 75, 0, '', ''],
# Header => [6, 'alpha', 40, 75, 0, '', ''],
# Footer => [7, 'alpha', 40, 75, 0, '', '']
# );
%db_def = (
ID => [0, 'numer', 5, 8, 1, '', ''],
Name => [1, 'alpha', 40, 75, 1, '', '^[\w\d/_-]+$'],
Description => [2, 'alpha', '40x3', 500, 0, '', ''],
Related => [3, 'alpha', 0, 255, 0, '', ''],
'Meta Description' => [4, 'alpha', 40, 75, 0, '', ''],
'Meta Keywords' => [5, 'alpha', 40, 75, 0, '', ''],
Header => [6, 'alpha', 40, 75, 0, '', ''],
Footer => [7, 'alpha', 40, 75, 0, '', ''],
Nonenglish => [8, 'alpha', 40, 75, 0, '', ''],
category_title => [8, 'alpha', 40, 100, 0, '', '']
);
# ***************************************** nonenglish modification - end ******************

# Database file to use -- defined in links.cfg.
$db_file_name = $db_category_name;
# Counter file to use -- defined in links.cfg.
$db_id_file_name = $db_category_id_file_name;
# The column name for the database key. MUST be the first column in the database.
$db_key = 'ID';
# Database delimeter.
$db_delim = '|';
# Title.
$html_title = 'Category Database';
$html_object = 'Category';

# Hash of column names to possible options. If you want to use a select form
# field, you can use &build_select_field in your HTML page. This routine will
# make a <SELECT> input tag using the following values:
%db_select_fields = ( );

# Hash of column names to radio values. If you use &build_radio_field, it will
# make a <INPUT TYPE="RADIO"> tag for you using the options specified in the hash.
%db_radio_fields = ( );

# Maximum number of hits returned in a search. Can be overridden in the search
# options.
$db_max_hits = '25';

# Use the built in key tracker.
$db_key_track = 1;

# ===========================================================================
# Build up some variables from your definitions. Internal use only.
@db_cols = ();
foreach (sort { $db_def{$a}[0] <=> $db_def{$b}[0] } keys %db_def) {
push (@db_cols, $_);
$db_sort{$_} = $db_def{$_}[1];
$db_form_len{$_} = $db_def{$_}[2];
$db_lengths{$_} = $db_def{$_}[3];
$db_not_null{$_} = $db_def{$_}[4];
$db_defaults{$_} = $db_def{$_}[5];
$db_valid_types{$_} = $db_def{$_}[6];
($_ eq $db_key) and $db_key_pos = $db_def{$_}[0];
}
1;