Annotation of loncom/debugging_tools/modify_config_files.pl, revision 1.10
1.1 matthew 1: #!/usr/bin/perl -w
2: #
3: # The LearningOnline Network
4: #
1.10 ! raeburn 5: # $Id: modify_config_files.pl,v 1.9 2009/07/14 03:05:59 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:
1.9 raeburn 39: This script modifies /etc/my.cnf and one of: /etc/yum.conf
40: (for Fedora/CentOS/Scientific Linux/RHEL5), /etc/apt/sources.list
41: (for Debian/Ubuntu) and /etc/sysconfig/rhn/sources (for RHEL4).
1.1 matthew 42:
43: =head1 DESCRIPTION
44:
1.9 raeburn 45: This script modifies /etc/my.cnf and /etc/yum.conf or /etc/apt/sources
46: or /etc/sysconfig/rhn/sources to ensure certain parameters are set
47: properly. The LON-CAPA yum repositories are added to /etc/yum.conf or
48: /etc/sysconfig/rhn/sources and the LON-CAPA apt repositories are added to
49: /etc/apt/sources.list.
50:
1.1 matthew 51: The /etc/my.cnf file is modified to set the wait_timeout to 1 year. Backup
1.9 raeburn 52: copies of each file are made in /etc, /etc/apt, and /etc/sysconfig/rhn, as
53: appropriate.
1.1 matthew 54:
55: =cut
56:
57: use strict;
58: use File::Copy;
1.3 matthew 59: use lib '/home/httpd/lib/perl/';
60: use LONCAPA::Configuration;
61: my $loncapa_config=LONCAPA::Configuration::read_conf('loncapa.conf');
1.1 matthew 62:
1.6 raeburn 63: open(DSH,"$$loncapa_config{'lonDaemons'}/distprobe |");
64: my $dist = <DSH>;
65: chomp($dist);
66: close(DSH);
67:
68: my $yum_status;
1.9 raeburn 69: my $loninst = 'http://install.loncapa.org';
70: my $loninst_re = 'http://install\.loncapa\.org';
71: if ($dist =~ /^fedora(\d+)$/) {
72: my $ver = $1;
1.10 ! raeburn 73: my $gpgchk = '0';
1.9 raeburn 74: my $gpg = "$loninst/versions/fedora/RPM-GPG-KEY-loncapa";
75: if ($ver > 6) {
1.10 ! raeburn 76: $gpgchk = '1';
1.9 raeburn 77: }
1.6 raeburn 78: $yum_status =
79: &update_file('/etc/yum.conf',
1.10 ! raeburn 80: [{section => 'loncapa-updates-basearch',
1.1 matthew 81: key => 'name=',
1.6 raeburn 82: value => 'Fedora Core $releasever LON-CAPA $basearch Updates',
1.10 ! raeburn 83: }, {section => 'loncapa-updates-basearch',
1.1 matthew 84: key => 'baseurl=',
1.9 raeburn 85: value => $loninst.'/fedora/linux/loncapa/$releasever/$basearch',
1.10 ! raeburn 86: }, {section => 'loncapa-updates-basearch',
1.5 matthew 87: key => 'gpgcheck=',
1.9 raeburn 88: value => $gpgchk,
1.10 ! raeburn 89: }, {section => 'loncapa-updates-basearch',
1.9 raeburn 90: key => 'gpg=',
91: value => $gpg,
1.1 matthew 92: }, {section => 'loncapa-updates-noarch',
93: key => 'name=',
94: value => 'Fedora Core $releasever LON-CAPA noarch Updates',
95: }, {section => 'loncapa-updates-noarch',
96: key => 'baseurl=',
1.9 raeburn 97: value => $loninst.'/fedora/linux/loncapa/$releasever/noarch',
1.5 matthew 98: }, {section => 'loncapa-updates-noarch',
99: key => 'gpgcheck=',
1.9 raeburn 100: value => $gpgchk,
101: }, {section => 'loncapa-updates-noarch',
102: key => 'gpg=',
103: value => $gpg,
1.1 matthew 104: }]);
1.9 raeburn 105: } elsif ($dist =~ /^(rhes|centos|scientific)(\d+)$/) {
106: my $type = $1;
107: my $ver = $2;
108: my $longver = $ver;
109: if ($type eq 'rhes') {
110: if ($ver == 4) {
111: $longver = '4ES';
112: } elsif ($ver == 5) {
113: $longver = '5Server';
114: }
115: }
116: my %info = (
117: rhes => {
118: title => 'RHEL',
119: path => 'redhat/linux/enterprise/loncapa',
120: gpg => 'versions/redhat/RPM-GPG-KEY-loncapa',
121: gpgchk => 1,
122: },
123: centos => {
124: title => 'CentOS',
125: path => 'centos/loncapa',
126: gpg => 'versions/centos/RPM-GPG-KEY-loncapa',
127: gpgchk => 1,
128: },
129: scientific => {
130: title => 'Scientific Linux',
131: path => 'scientific/loncapa',
132: gpg => 'versions/scientific/RPM-GPG-KEY-loncapa',
133: gpgchk => 1,
134: },
135: );
136: if (ref($info{$type}) eq 'HASH') {
137: if ($ver > 4) {
138: $yum_status =
139: &update_file('/etc/yum.conf',
140: [{section => 'loncapa-updates-basearch',
141: key => 'name=',
142: value => $info{$type}{title}.' $releasever LON-CAPA $basearch Updates',
143: }, {section => "loncapa-updates-basearch",
144: key => 'baseurl=',
145: value => "$loninst/$info{$type}{path}/".'$releasever/$basearch',
146: }, {section => 'loncapa-updates-basearch',
147: key => 'gpgcheck=',
148: value => $info{$type}{gpchk},
1.10 ! raeburn 149: }, {section => 'loncapa-updates-basearch',
1.9 raeburn 150: key => 'gpgkey=',
151: value => "$loninst/$info{$type}{gpg}",
152: }, {section => 'loncapa-updates-noarch',
153: key => 'name=',
154: value => $info{$type}{title}.' $releasever LON-CAPA noarch Updates',
155: }, {section => 'loncapa-updates-noarch',
156: key => 'baseurl=',
157: value => "$loninst/$info{$type}{path}/".'$releasever/noarch',
158: }, {section => 'loncapa-updates-noarch',
159: key => 'gpgcheck=',
160: value => $info{$type}{gpchk},
161: }, {section => 'loncapa-updates-noarch',
162: key => 'gpgkey=',
163: value => "$loninst/$info{$type}{gpg}",
164: }]);
165: } elsif (($type eq 'rhes') && ($ver == 4)) {
166: my %rhn = (
167: basearch => {
168: regexp => '\s*yum\s+loncapa\-updates\-basearch\s+'.$loninst_re.'/'.$info{$type}{path}.'/'.$longver.'/\$ARCH',
169: text => "yum loncapa-updates-basearch $loninst/$info{$type}{path}/$longver/".'$ARCH',
170: },
171: noarch => {
172: regexp => '\s*yum\s+loncapa\-updates\-noarch\s+'.$loninst_re.'/'.$info{$type}{path}.'/'.$longver.'/noarch',
173: text => "yum loncapa-updates-noarch $loninst/$info{$type}{path}/$longver/noarch",
174: },
175: );
176: $yum_status = &update_rhn_source(\%rhn);
177: }
178: }
179: } elsif ($dist =~ /^(debian|ubuntu)\d+$/) {
180: my %apt_get_source = (
181: debian5 => {
182: regexp => '\s*deb\s+'.$loninst_re.'/debian/\s+lenny\s+main',
183: text => "deb $loninst/debian/ lenny main",
184: },
185: ubuntu6 => {
186: regexp => '\s*deb\s+'.$loninst_re.'/ubuntu/\s+dapper\s+main',
187: text => "deb $loninst/ubuntu/ dapper main",
188: },
189: ubuntu8 => {
190: regexp => '\s*deb\s+'.$loninst_re.'/ubuntu/\s+hardy\s+main',
191: text => "deb $loninst/ubuntu/ hardy main",
192: },
193: );
194: my $apt_status;
195: if (defined($apt_get_source{$dist})) {
196: $apt_status = &update_apt_source($apt_get_source{$dist},);
1.6 raeburn 197: }
198: }
1.1 matthew 199:
1.4 matthew 200: my $mysql_global_status =
201: &update_file('/etc/my.cnf',
1.1 matthew 202: [{section =>'mysqld',
203: key =>'set-variable=wait_timeout=',
204: value =>'31536000', }]);
205:
1.3 matthew 206: my $local_my_cnf = '/home/www/.my.cnf';
207: if (! -e $local_my_cnf) {
1.4 matthew 208: # Create a file so we can do something with it...
1.3 matthew 209: system("touch $local_my_cnf");
210: }
1.4 matthew 211: my $mysql_www_status =
212: &update_file($local_my_cnf,
1.3 matthew 213: [{section =>'client',
214: key =>'user=',
215: value =>'www',},
216: {section =>'client',
217: key =>'password=',
218: value =>$loncapa_config->{'lonSqlAccess'}},]);
219:
1.4 matthew 220: my $exitvalue = 0;
221:
222: if ($mysql_global_status) { $exitvalue = 1; }
223:
224: exit $exitvalue;
1.1 matthew 225:
226:
227: sub update_file {
228: my ($file,$newdata) = @_;
229: return 1 if (! -e $file);
230: my $backup = $file.'.backup';
231: if (! copy($file,$backup)) {
1.4 matthew 232: warn "**** Error: Unable to make backup of $file";
1.1 matthew 233: return 0;
234: }
235: my ($filedata) = &parse_config_file($file);
1.4 matthew 236: if (! ref($filedata)) { warn "**** Error: $filedata"; return 0;}
237: my $modified = 0;
1.1 matthew 238: foreach my $data (@$newdata) {
239: my $section = $data->{'section'};
240: my $key = $data->{'key'};
241: my $value = $data->{'value'};
1.4 matthew 242: my $result = &modify_config_file($filedata,$section,$key,$value);
243: if ($result) { $modified = 1; }
244: }
245: if ($modified) {
246: my $result = &write_config_file($file,$filedata);
247: if (defined($result)) { warn 'Error:'.$result; return 0; }
1.1 matthew 248: }
1.4 matthew 249: return $modified;
1.1 matthew 250: }
251:
252: #################################################################
253: #################################################################
254:
255: =pod
256:
1.9 raeburn 257: =over 4
258:
259: =item &parse_config_file()
1.1 matthew 260:
261: Read a configuration file in and parse it into an internal data structure.
262:
263: Input: filename
264:
265: Output: array ref $filedata OR scalar error message
266:
1.9 raeburn 267: =back
268:
1.1 matthew 269: =cut
270:
271: #################################################################
272: #################################################################
273: sub parse_config_file {
274: my ($file) = @_;
275: open(INFILE,$file) || return ('Unable to open '.$file.' for reading');
276: my @Input = <INFILE>;
277: close(INFILE);
278: my @Structure;
279: my %Sections;
280: while (my $line = shift(@Input)) {
281: chomp($line);
282: if ($line =~ /^\[([^\]]*)\]/) {
283: my $section_id = $1;
284: push(@Structure,'__section__'.$section_id);
285: while ($line = shift(@Input)) {
1.4 matthew 286: chomp($line);
1.1 matthew 287: if ($line =~ /^\[([^\]]*)\]/) {
288: unshift(@Input,$line);
289: last;
290: } else {
291: push(@{$Sections{$section_id}},$line);
292: }
293: }
294: } else {
295: push(@Structure,$line);
296: }
297: }
298: my $filedata = [\@Structure,\%Sections];
299: return $filedata;
300: }
301:
302: #################################################################
303: #################################################################
304:
305: =pod
306:
1.9 raeburn 307: =over 4
308:
1.1 matthew 309: =item
310:
311: Write a configuration file out based on the internal data structure returned
312: by &parse_config_file
313:
314: Inputs: filename, $filedata (the return value of &parse_config_file
315:
316: Returns: undef on success, scalar error message on failure.
317:
1.9 raeburn 318: =back
319:
1.1 matthew 320: =cut
321:
322: #################################################################
323: #################################################################
324: sub write_config_file {
325: my ($file,$filedata) = @_;
326: my ($structure,$sections) = @$filedata;
327: if (! defined($structure) || ! ref($structure)) {
328: return 'Bad subroutine inputs';
329: }
330: open(OUTPUT,'>'.$file) || return('Unable to open '.$file.' for writing');
331: for (my $i=0;$i<scalar(@$structure);$i++) {
332: my $line = $structure->[$i];
333: chomp($line);
334: if ($line =~ /^__section__(.*)$/) {
335: my $section_id = $1;
336: print OUTPUT ('['.$section_id.']'.$/);
337: foreach my $section_line (@{$sections->{$section_id}}) {
338: chomp($section_line);
339: print OUTPUT $section_line.$/;
340: }
341: # Deal with blank lines
342: if ($sections->{$section_id}->[-1] =~ /^\s*$/) {
343: # No need to output a blank line at the end if there is one
344: # already
345: } else {
346: print OUTPUT $/;
347: }
348: } else {
349: print OUTPUT $line.$/;
350: }
351: }
352: close OUTPUT;
353: return undef;
354: }
355:
356: #################################################################
357: #################################################################
358:
359: =pod
360:
1.9 raeburn 361: =over 4
362:
363: =item &modify_config_file()
1.1 matthew 364:
365: Modifies the internal data structure of a configuration file to include new
366: sections and/or new configuration directives.
367:
368: Inputs: $filedata (see &parse_config_file
369: $section, the [section] the new entry is to reside in. A value of undef will
370: cause the "outer" section (as in yum.conf) to be updated (or have the new
371: value prepended).
372: $newkey: A line which matches this will be replaced with $newkey.$newvalue
373: $newvalue: The new value to be placed with the new key.
374:
1.4 matthew 375: Returns: 0 or 1, indicating if the file was modified(1) or not(0).
376:
1.9 raeburn 377: =back
1.4 matthew 378:
1.1 matthew 379: =cut
380:
381: #################################################################
382: #################################################################
383: sub modify_config_file {
384: my ($filedata,$section,$newkey,$newvalue)=@_;
1.4 matthew 385: my $modified = 0; # returned value - set to true if the file is modified
1.1 matthew 386: my ($structure,$sections) = @$filedata;
387: if (! defined($newvalue)) {
388: $newvalue = '';
389: }
390: my $newline = $newkey.$newvalue;
391: #
392: # Determine which array ref gets the item
393: my $target;
394: if (defined($section)) {
395: if (! exists($sections->{$section})) {
396: push(@$structure,'__section__'.$section);
397: $sections->{$section}=[];
398: }
399: $target = $sections->{$section};
400: } else {
401: $target = $structure;
402: }
403: #
404: # Put the item in or update it.
405: my $key_is_new = 1;
406: for (my $i=0;$i<scalar(@$target);$i++) {
407: if ($target->[$i] =~/^$newkey/) {
1.4 matthew 408: if ($target->[$i] ne $newline) {
409: $target->[$i]=$newline;
410: $modified = 1;
411: }
1.1 matthew 412: $key_is_new = 0;
413: last;
414: }
415: }
416: if ($key_is_new) {
417: if (! defined($section)) {
418: unshift(@$target,$newline);
419: } else {
420: # No need to put things after a blank line.
1.2 matthew 421: if (defined($target->[-1]) && $target->[-1] =~ /^\s*$/) {
1.1 matthew 422: $target->[-1] = $newline;
1.4 matthew 423: $modified = 1;
1.1 matthew 424: } else {
425: push(@$target,$newline);
1.4 matthew 426: $modified = 1;
1.1 matthew 427: }
428: }
429: }
1.4 matthew 430: return $modified;
1.1 matthew 431: }
432:
1.9 raeburn 433: #################################################################
434: #################################################################
435:
436: =pod
437:
438: =over 4
439:
440: =item &update_rhn_source()
441:
442: Modifies the Red Hat 4 sources file which includes repositories used by up2date
443:
444: Inputs:
445: $rhn_items - a reference to hash of a hash containing the regular expression
446: to test for, and the text string to append to the file, if an entry for the
447: LON-CAPA RHEL repository is missing for two cases:
448:
449: (a) basearch
450: (b) noarch
451:
452: Returns: 0 or 1, indicating if the file was modified(1) or not(0).
453:
454: =back
455:
456: =cut
457:
458: #################################################################
459: #################################################################
460: sub update_rhn_source {
461: my ($rhn_items) = @_;
462: return 0 if (ref($rhn_items) ne 'HASH');
463: return 0 if ((ref($rhn_items->{basearch}) ne 'HASH') || (ref($rhn_items->{noarch}) ne 'HASH'));
464: my $file = '/etc/sysconfig/rhn/sources';
465: return 0 if (! -e $file);
466: my $backup = $file.'.backup';
467: if (! copy($file,$backup)) {
468: warn "**** Error: Unable to make backup of $file";
469: return 0;
470: }
471: my $result = 0;
472: my $fh;
473: if (open($fh,"<$file")) {
474: my $total = 0;
475: my %found;
476: foreach my $item (keys(%{$rhn_items})) {
477: $found{$item} = 0;
478: }
479: while(<$fh>) {
480: foreach my $item (keys(%{$rhn_items})) {
481: if (ref($rhn_items->{$item}) eq 'HASH') {
482: my $pattern = $rhn_items->{$item}->{regexp};
483: if ($pattern ne '') {
484: if (m{^$pattern}) {
485: $found{$item} = 1;
486: $total ++;
487: }
488: }
489: }
490: }
491: last if $total == 2;
492: }
493: close($fh);
494: if ($total < 2) {
495: if (open($fh,">>$file")) {
496: foreach my $item (keys(%{$rhn_items})) {
497: unless ($found{$item}) {
498: if (ref($rhn_items->{$item}) eq 'HASH') {
499: if ($rhn_items->{$item}->{text} ne '') {
500: print $fh "\n".$rhn_items->{$item}->{text}."\n";
501: $result = 1;
502: }
503: }
504: }
505: }
506: close($fh);
507: }
508: }
509: }
510: return $result;
511: }
1.1 matthew 512:
513: #################################################################
514: #################################################################
515:
516: =pod
517:
1.9 raeburn 518: =over 4
519:
520: =item &update_apt_source()
521:
522: Modifies the source.list file which includes repositories used by apt-get
523:
524: Inputs:
525: $deb_row - a reference to containing the regular expression
526: to test for, and the text string to append to the file, if an entry for the
527: LON-CAPA Debian/ or Ubuntu repository is missing.
528:
529: Returns: 0 or 1, indicating if the file was modified(1) or not(0).
530:
1.1 matthew 531: =back
532:
533: =cut
534:
535: #################################################################
536: #################################################################
1.9 raeburn 537: sub update_apt_source {
538: my ($deb_row) = @_;
539: return 0 if (ref($deb_row) ne 'HASH');
540: return 0 if (($deb_row->{regexp} eq '') || ($deb_row->{text} eq ''));
541: my $file = '/etc/apt/sources.list';
542: return 0 if (! -e $file);
543: my $backup = $file.'.backup';
544: if (! copy($file,$backup)) {
545: warn "**** Error: Unable to make backup of $file";
546: return 0;
547: }
548: my $result = 0;
549: my $fh;
550: if (open($fh,"<$file")) {
551: my $found = 0;
552: my $pattern = $deb_row->{regexp};
553: while(<$fh>) {
554: if (m{^$pattern}) {
555: $found = 1;
556: last;
557: }
558: }
559: close($fh);
560: if (!$found) {
561: if (open($fh,">>$file")) {
562: print $fh "\n".$deb_row->{text}."\n";
563: close($fh);
564: $result = 1;
565: }
566: }
567: }
568: return $result;
569: }
570:
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