File:
[LON-CAPA] /
loncom /
debugging_tools /
excise_from_db.pl
Revision
1.1:
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Tue Jan 27 18:42:25 2004 UTC (20 years, 8 months ago) by
matthew
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MAIN
CVS tags:
version_1_3_X,
version_1_3_3,
version_1_3_2,
version_1_3_1,
version_1_3_0,
version_1_2_X,
version_1_2_99_1,
version_1_2_99_0,
version_1_2_1,
version_1_2_0,
version_1_1_99_5,
version_1_1_99_4,
version_1_1_99_3,
version_1_1_99_2,
version_1_1_99_1,
version_1_1_99_0,
HEAD
Initial commit of utility routine to remove a key from a *.db file.
1: #!/usr/bin/perl -w
2: #
3: # The LearningOnline Network
4: #
5: # excise_from_db.pl - Remove a key from a db file.
6: #
7: # $Id: excise_from_db.pl,v 1.1 2004/01/27 18:42:25 matthew Exp $
8: #
9: # Copyright Michigan State University Board of Trustees
10: #
11: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
12: #
13: # LON-CAPA is free software; you can redistribute it and/or modify
14: # it under the terms of the GNU General Public License as published by
15: # the Free Software Foundation; either version 2 of the License, or
16: # (at your option) any later version.
17: #
18: # LON-CAPA is distributed in the hope that it will be useful,
19: # but WITHOUT ANY WARRANTY; without even the implied warranty of
20: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21: # GNU General Public License for more details.
22: #
23: # You should have received a copy of the GNU General Public License
24: # along with LON-CAPA; if not, write to the Free Software
25: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26: #
27: # /home/httpd/html/adm/gpl.txt
28: #
29: # http://www.lon-capa.org/
30: #
31: #################################################
32: use strict;
33: use GDBM_File;
34:
35: #
36: # Options
37: my $fname = shift;
38: my $key = shift;
39:
40: my %db;
41: if (! tie(%db,'GDBM_File',$fname,&GDBM_WRITER,0640)) {
42: warn "Unable to tie to $fname";
43: next;
44: }
45: delete($db{$key});
46: delete($db{&escape($key)});
47:
48: untie %db;
49:
50: exit;
51:
52: ######################################
53: sub escape {
54: my $str=shift;
55: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
56: return $str;
57: }
58:
59: sub unescape {
60: my $str=shift;
61: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
62: return $str;
63: }
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