Annotation of loncom/debugging_tools/modify_config_files.pl, revision 1.8
1.1 matthew 1: #!/usr/bin/perl -w
2: #
3: # The LearningOnline Network
4: #
1.8 ! raeburn 5: # $Id: modify_config_files.pl,v 1.7 2007/04/24 13:09:40 raeburn Exp $
1.1 matthew 6: #
7: # Copyright Michigan State University Board of Trustees
8: #
9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
10: #
11: # LON-CAPA is free software; you can redistribute it and/or modify
12: # it under the terms of the GNU General Public License as published by
13: # the Free Software Foundation; either version 2 of the License, or
14: # (at your option) any later version.
15: #
16: # LON-CAPA is distributed in the hope that it will be useful,
17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19: # GNU General Public License for more details.
20: #
21: # You should have received a copy of the GNU General Public License
22: # along with LON-CAPA; if not, write to the Free Software
23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
27: # http://www.lon-capa.org/
28: #
29: ###
30:
31: =pod
32:
33: =head1 NAME
34:
35: B<modify_config_files.pl>
36:
37: =head1 SYNOPSIS
38:
39: This script modifies /etc/yum.conf and /etc/my.cnf.
40:
41: =head1 DESCRIPTION
42:
43: This script modifies /etc/yum.conf and /etc/my.cnf to ensure certain parameters
44: are set properly. The LON-CAPA yum repositories are added to /etc/yum.conf.
45: The /etc/my.cnf file is modified to set the wait_timeout to 1 year. Backup
46: copies of each file are made in /etc.
47:
48: =cut
49:
50: use strict;
51: use File::Copy;
1.3 matthew 52: use lib '/home/httpd/lib/perl/';
53: use LONCAPA::Configuration;
54: my $loncapa_config=LONCAPA::Configuration::read_conf('loncapa.conf');
1.1 matthew 55:
1.6 raeburn 56: open(DSH,"$$loncapa_config{'lonDaemons'}/distprobe |");
57: my $dist = <DSH>;
58: chomp($dist);
59: close(DSH);
60:
61: my $yum_status;
62: if ($dist =~ /^fedora\d+$/) {
63: $yum_status =
64: &update_file('/etc/yum.conf',
65: [{section => 'loncapa-updates-$basearch',
1.1 matthew 66: key => 'name=',
1.6 raeburn 67: value => 'Fedora Core $releasever LON-CAPA $basearch Updates',
68: }, {section => 'loncapa-updates-$basearch',
1.1 matthew 69: key => 'baseurl=',
70: value => 'http://install.loncapa.org/fedora/linux/loncapa/'.
1.6 raeburn 71: '$releasever/$basearch',
72: }, {section => 'loncapa-updates-$basearch',
1.5 matthew 73: key => 'gpgcheck=',
74: value => '0',
1.1 matthew 75: }, {section => 'loncapa-updates-noarch',
76: key => 'name=',
77: value => 'Fedora Core $releasever LON-CAPA noarch Updates',
78: }, {section => 'loncapa-updates-noarch',
79: key => 'baseurl=',
80: value => 'http://install.loncapa.org/fedora/linux/loncapa/'.
81: '$releasever/noarch',
1.5 matthew 82: }, {section => 'loncapa-updates-noarch',
83: key => 'gpgcheck=',
84: value => '0',
1.1 matthew 85: }]);
1.6 raeburn 86: } elsif ($dist =~ /^rhes(\d+)$/) {
87: if ($1 > 4) {
88: $yum_status =
89: &update_file('/etc/yum.conf',
90: [{section => 'loncapa-updates-$basearch',
91: key => 'name=',
92: value => 'RHEL $releasever LON-CAPA $basearch Updates',
93: }, {section => 'loncapa-updates-$basearch',
94: key => 'baseurl=',
1.8 ! raeburn 95: value => 'http://install.loncapa.org/redhat/linux/enterprise/loncapa/'.
1.6 raeburn 96: '$releasever/$basearch',
97: }, {section => 'loncapa-updates-$basearch',
98: key => 'gpgcheck=',
99: value => '1',
100: }, {section => 'loncapa-updates-$basearch',
101: key => 'gpgkey=',
102: value => 'http://install.loncapa.org/versions/redhat/'.
1.7 raeburn 103: 'RPM-GPG-KEY-loncapa',
1.6 raeburn 104: }, {section => 'loncapa-updates-noarch',
105: key => 'name=',
106: value => 'RHEL $releasever LON-CAPA noarch Updates',
107: }, {section => 'loncapa-updates-noarch',
108: key => 'baseurl=',
1.8 ! raeburn 109: value => 'http://install.loncapa.org/redhat/linux/enterprise/loncapa/'.
1.6 raeburn 110: '$releasever/noarch',
111: }, {section => 'loncapa-updates-noarch',
112: key => 'gpgcheck=',
113: value => '1',
114: }, {section => 'loncapa-updates-noarch',
115: key => 'gpgkey=',
116: value => 'http://install.loncapa.org/versions/redhat/'.
1.7 raeburn 117: 'RPM-GPG-KEY-loncapa',
1.6 raeburn 118: }]);
119: }
120: }
1.1 matthew 121:
1.4 matthew 122: my $mysql_global_status =
123: &update_file('/etc/my.cnf',
1.1 matthew 124: [{section =>'mysqld',
125: key =>'set-variable=wait_timeout=',
126: value =>'31536000', }]);
127:
1.3 matthew 128: my $local_my_cnf = '/home/www/.my.cnf';
129: if (! -e $local_my_cnf) {
1.4 matthew 130: # Create a file so we can do something with it...
1.3 matthew 131: system("touch $local_my_cnf");
132: }
1.4 matthew 133: my $mysql_www_status =
134: &update_file($local_my_cnf,
1.3 matthew 135: [{section =>'client',
136: key =>'user=',
137: value =>'www',},
138: {section =>'client',
139: key =>'password=',
140: value =>$loncapa_config->{'lonSqlAccess'}},]);
141:
1.4 matthew 142: my $exitvalue = 0;
143:
144: if ($mysql_global_status) { $exitvalue = 1; }
145:
146: exit $exitvalue;
1.1 matthew 147:
148:
149:
150: #################################################################
151: #################################################################
152:
153: =pod
154:
155: =over 4
156:
157: =cut
158:
159: #################################################################
160: #################################################################
161: sub update_file {
162: my ($file,$newdata) = @_;
163: return 1 if (! -e $file);
164: my $backup = $file.'.backup';
165: if (! copy($file,$backup)) {
1.4 matthew 166: warn "**** Error: Unable to make backup of $file";
1.1 matthew 167: return 0;
168: }
169: my ($filedata) = &parse_config_file($file);
1.4 matthew 170: if (! ref($filedata)) { warn "**** Error: $filedata"; return 0;}
171: my $modified = 0;
1.1 matthew 172: foreach my $data (@$newdata) {
173: my $section = $data->{'section'};
174: my $key = $data->{'key'};
175: my $value = $data->{'value'};
1.4 matthew 176: my $result = &modify_config_file($filedata,$section,$key,$value);
177: if ($result) { $modified = 1; }
178: }
179: if ($modified) {
180: my $result = &write_config_file($file,$filedata);
181: if (defined($result)) { warn 'Error:'.$result; return 0; }
1.1 matthew 182: }
1.4 matthew 183: return $modified;
1.1 matthew 184: }
185:
186: #################################################################
187: #################################################################
188:
189: =pod
190:
191: =item &parse_config_file
192:
193: Read a configuration file in and parse it into an internal data structure.
194:
195: Input: filename
196:
197: Output: array ref $filedata OR scalar error message
198:
199: =cut
200:
201: #################################################################
202: #################################################################
203: sub parse_config_file {
204: my ($file) = @_;
205: open(INFILE,$file) || return ('Unable to open '.$file.' for reading');
206: my @Input = <INFILE>;
207: close(INFILE);
208: my @Structure;
209: my %Sections;
210: while (my $line = shift(@Input)) {
211: chomp($line);
212: if ($line =~ /^\[([^\]]*)\]/) {
213: my $section_id = $1;
214: push(@Structure,'__section__'.$section_id);
215: while ($line = shift(@Input)) {
1.4 matthew 216: chomp($line);
1.1 matthew 217: if ($line =~ /^\[([^\]]*)\]/) {
218: unshift(@Input,$line);
219: last;
220: } else {
221: push(@{$Sections{$section_id}},$line);
222: }
223: }
224: } else {
225: push(@Structure,$line);
226: }
227: }
228: my $filedata = [\@Structure,\%Sections];
229: return $filedata;
230: }
231:
232: #################################################################
233: #################################################################
234:
235: =pod
236:
237: =item
238:
239: Write a configuration file out based on the internal data structure returned
240: by &parse_config_file
241:
242: Inputs: filename, $filedata (the return value of &parse_config_file
243:
244: Returns: undef on success, scalar error message on failure.
245:
246: =cut
247:
248: #################################################################
249: #################################################################
250: sub write_config_file {
251: my ($file,$filedata) = @_;
252: my ($structure,$sections) = @$filedata;
253: if (! defined($structure) || ! ref($structure)) {
254: return 'Bad subroutine inputs';
255: }
256: open(OUTPUT,'>'.$file) || return('Unable to open '.$file.' for writing');
257: for (my $i=0;$i<scalar(@$structure);$i++) {
258: my $line = $structure->[$i];
259: chomp($line);
260: if ($line =~ /^__section__(.*)$/) {
261: my $section_id = $1;
262: print OUTPUT ('['.$section_id.']'.$/);
263: foreach my $section_line (@{$sections->{$section_id}}) {
264: chomp($section_line);
265: print OUTPUT $section_line.$/;
266: }
267: # Deal with blank lines
268: if ($sections->{$section_id}->[-1] =~ /^\s*$/) {
269: # No need to output a blank line at the end if there is one
270: # already
271: } else {
272: print OUTPUT $/;
273: }
274: } else {
275: print OUTPUT $line.$/;
276: }
277: }
278: close OUTPUT;
279: return undef;
280: }
281:
282: #################################################################
283: #################################################################
284:
285: =pod
286:
287: =item &modify_config_file
288:
289: Modifies the internal data structure of a configuration file to include new
290: sections and/or new configuration directives.
291:
292: Inputs: $filedata (see &parse_config_file
293: $section, the [section] the new entry is to reside in. A value of undef will
294: cause the "outer" section (as in yum.conf) to be updated (or have the new
295: value prepended).
296: $newkey: A line which matches this will be replaced with $newkey.$newvalue
297: $newvalue: The new value to be placed with the new key.
298:
1.4 matthew 299: Returns: 0 or 1, indicating if the file was modified(1) or not(0).
300:
301:
1.1 matthew 302: =cut
303:
304: #################################################################
305: #################################################################
306: sub modify_config_file {
307: my ($filedata,$section,$newkey,$newvalue)=@_;
1.4 matthew 308: my $modified = 0; # returned value - set to true if the file is modified
1.1 matthew 309: my ($structure,$sections) = @$filedata;
310: if (! defined($newvalue)) {
311: $newvalue = '';
312: }
313: my $newline = $newkey.$newvalue;
314: #
315: # Determine which array ref gets the item
316: my $target;
317: if (defined($section)) {
318: if (! exists($sections->{$section})) {
319: push(@$structure,'__section__'.$section);
320: $sections->{$section}=[];
321: }
322: $target = $sections->{$section};
323: } else {
324: $target = $structure;
325: }
326: #
327: # Put the item in or update it.
328: my $key_is_new = 1;
329: for (my $i=0;$i<scalar(@$target);$i++) {
330: if ($target->[$i] =~/^$newkey/) {
1.4 matthew 331: if ($target->[$i] ne $newline) {
332: $target->[$i]=$newline;
333: $modified = 1;
334: }
1.1 matthew 335: $key_is_new = 0;
336: last;
337: }
338: }
339: if ($key_is_new) {
340: if (! defined($section)) {
341: unshift(@$target,$newline);
342: } else {
343: # No need to put things after a blank line.
1.2 matthew 344: if (defined($target->[-1]) && $target->[-1] =~ /^\s*$/) {
1.1 matthew 345: $target->[-1] = $newline;
1.4 matthew 346: $modified = 1;
1.1 matthew 347: } else {
348: push(@$target,$newline);
1.4 matthew 349: $modified = 1;
1.1 matthew 350: }
351: }
352: }
1.4 matthew 353: return $modified;
1.1 matthew 354: }
355:
356:
357: #################################################################
358: #################################################################
359:
360: =pod
361:
362: =back
363:
364: =cut
365:
366: #################################################################
367: #################################################################
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