1: #!/usr/bin/perl
2:
3: =pod
4:
5: =head1 CAVEAT USER
6:
7: This is a modified version of CHECKRPMS, and should be installed
8: as a file named "CHECKRPMS_custom". Generally, this file should
9: be placed at /usr/local/CHECKRPMS/bin/. A file named
10: "check-rpms" also needs to be at /usr/local/CHECKRPMS/bin/.
11:
12: An example crontab entry might be:
13:
14: 10 4 * * * www /usr/local/CHECKRPMS/bin/CHECKRPMS_custom --cronmail:j@b
15:
16: You should substitute j@b with your desired e-mail address (or a
17: comma-separated list of e-mail addresses with no whitespace).
18:
19: =head1 NAME
20:
21: B<CHECKRPMS> - automated status report about RPMs on a system
22:
23: =head1 SYNOPSIS
24:
25: ./B<CHECKRPMS> [I<modeflag>]
26:
27: or
28:
29: B<perl> B<CHECKRPMS> [I<modeflag>]
30:
31: If I<modeflag> is left blank, the mode is "interactive". Otherwise,
32: other modes can be specified as shown in the listing below:
33:
34: =over 4
35:
36: =item DEFAULT
37:
38: When left blank, the script runs in interactive mode. First, a proposed
39: list of RPMs is presented to the user. Then, the user is asked if he or
40: she wants to download the RPMs to /tmp/loncapa_rpm_updates/.
41:
42: =item view
43:
44: A proposed list of RPMs to update is presented to the user.
45:
46: =item download
47:
48: A proposed set of RPMs to update are downloaded into /tmp/loncapa_rpm_updates/.
49: Note that prior information inside /tmp/loncapa_rpm_updates/ is removed.
50:
51: =item redownload
52:
53: A proposed set of RPMs to update are downloaded into /tmp/loncapa_rpm_updates/.
54: Note that prior information inside /tmp/loncapa_rpm_updates/ is not removed.
55: (This helps support continual attempts from dialup connections.)
56:
57: =item html
58:
59: Similar to view mode. XHTML-formatted output is delivered; presumably
60: to a web client. html mode is automatically chosen if $ENV{'QUERY_STRING'} is
61: defined.
62:
63: =back
64:
65: =head1 DESCRIPTION
66:
67: This file automates the usage of Martin Siegert's "check-rpms"
68: script. It runs through a list of possible mirror sites
69: until it finds one with a reasonably good FTP connection.
70:
71: For instructions on usage, see L<SYNOPSIS>.
72:
73: =head1 AUTHOR
74:
75: Scott Harrison, sharrison@users.sourceforge.net, 2002
76:
77: =cut
78:
79: # ================================================== READ IN COMMAND ARGUMENTS.
80:
81: # ---------------------------------------------------- Process download option.
82: my $argument = shift(@ARGV);
83: my $document;
84: my $mode;
85: my $cronmailaddress;
86: if ($argument eq '--download' or $argument eq '--redownload')
87: {
88: if ($< != 0) # Download mode requires 'root'.
89: {
90: print(
91: '**** ERROR **** Download mode needs to be run as root'."\n");
92: exit(0); # Exit.
93: }
94: `rm -Rf /tmp/loncapa_rpm_updates` if $argument eq '--download';
95: $download='-v -dl -d /tmp/loncapa_rpm_updates'; # Part of check-rpms args.
96: $mode = 'download';
97: }
98: elsif ($argument eq '--view')
99: {
100: $mode = 'view';
101: }
102: elsif ($argument eq '--cronmail')
103: {
104: $mode = 'cronmail';
105: }
106: elsif ($argument =~ /^--cronmail/)
107: {
108: $mode = 'cronmail';
109: $argument =~ /^--cronmail\:(.*)/;
110: my $email = $1;
111: if ($email =~ /\@/)
112: {
113: $cronmailaddress = $email;
114: }
115: }
116: elsif ($ENV{'QUERY_STRING'} or $argument eq '--html')
117: {
118: $mode = 'html';
119: }
120: else
121: {
122: $mode = 'interactive';
123: }
124:
125: # ================================================== GENERAL INITIAL VARIABLES.
126: my $command_name=$0;
127:
128: # ---------------- The FTP servers (and their directory paths) to check against
129: my @serverpaths_to_try =
130: (
131: 'ftpmirror:loncapa@install.lon-capa.org/pub/redhat/linux/updates/',
132: 'mirror.pa.msu.edu/linux/redhat/linux/updates/',
133: 'distro.ibiblio.org/pub/linux/distributions/redhat/updates/',
134: 'limestone.uoregon.edu/redhat/updates/',
135: 'rufus.w3.org/linux/redhat/linux/updates/',
136: );
137:
138: # -------------------------------------------- Use check-rpms command this way.
139: my $checkcommand = 'check-rpms '.$download.' --rpmuser www -ftp';
140:
141: my $FTPSERVER; # ------------------------- the server portion of the serverpath
142: my $FTPUPDATES; # ----------------------------- the actual update root location
143: my @rpms; # ---------------------------------- this will store the list of RPMs
144: my $goodoutput; # ------------------------------------ good stuff was returned!
145: my $reallygoodoutput; # ------------------------------- you are 100% up-to-date
146:
147: # ===================================================== Control flow of output.
148: my $out = \*STDOUT; # Default: go to standard output (directly to terminal).
149:
150: if ($mode eq 'cronmail') # If cronmail mode, then save to file.
151: {
152: open(FOUT,'>/tmp/CHECKRPMS.'.$$);
153: $out = \*FOUT;
154: }
155:
156: $| = 1; # Flush to output whenever possible.
157:
158: # ========================================== Variables that must be defineable.
159:
160: # --------------------------------------------------- Determine RedHat version.
161: my $RHversion = (split /\s/, `cat /etc/redhat-release`)[4]; # - 6.2 or 7.3 or ?
162:
163: unless ($RHversion)
164: {
165: terminate($mode,$out,
166: '**** ERROR **** /etc/redhat-release not found'."\n".
167: 'This script does not appear to be running on RedHat.'."\n");
168: }
169:
170: # ----------------------------------------- Find the check-rpms script location
171: if (-e '/usr/local/CHECKRPMS/bin/check-rpms')
172: {
173: $commandpre='perl /usr/local/CHECKRPMS/bin/'; # Use /usr/local dir.
174: }
175: else # Cannot find check-rpms, so abort.
176: {
177: terminate($mode,$out,
178: '**** ERROR **** CANNOT FIND THE check-rpms SCRIPT'."\n");
179: }
180:
181: # Define check-rpms invocation based on the path to the check-rpms command.
182: $checkcommand = $commandpre.$checkcommand;
183:
184: # ============================================================= Initial output.
185:
186: print($out <<END) if $mode eq 'html';
187: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
188: "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
189: <html>
190: <head>
191: <meta http-equiv="Content-Type" content="text/html; charset=utf-8"></meta>
192: <title>CHECKRPMS STATUS REPORT</title>
193: </head>
194: <body bgcolor="white">
195: <h1>CHECKRPMS STATUS REPORT</h1>
196: <hr />
197: <pre>
198: END
199:
200: # Notify user of current action.
201: print($out <<END);
202: THIS SCRIPT IS NOW PROBING SEVERAL FTP SERVERS....
203: PLEASE BE PATIENT, THIS MAY TAKE A FEW MINUTES.
204: END
205:
206: # ============== Go through all the servers until a decent connection is found.
207: SERVERLOOP: foreach my $serverpath (@serverpaths_to_try)
208: {
209: $serverpath=~/^(.*?)\//; # Pattern match the ip name.
210: $FTPSERVER=$1; # Set to the ip name.
211: $FTPSERVER_noauth=$FTPSERVER;
212: $FTPSERVER_noauth=~s/^.*?\@//;
213: print($out
214: "Trying $FTPSERVER_noauth...\n"); # Notify of attempts with ip name.
215: `ping -c 1 $FTPSERVER_noauth 2>/dev/null`; # Ping ftp server (you there?).
216: if ($?==0) # If the ftp server can be pinged.
217: {
218: print($out "$FTPSERVER found...\n"); # Tell user ftp server is found.
219: `ncftpls ftp://$FTPSERVER`; # Try to access server with ftp protocol.
220: if ($?==0) # If the ftp server can be accessed with the ftp protocol.
221: {
222: $FTPUPDATES="$serverpath$RHversion/en/os"; # The full update path.
223: # Print the check-rpms command that will be executed.
224: print($out $checkcommand.' '.$FTPUPDATES."\n");
225: if ($mode eq 'download') # Was CHECKRPMS run in download mode?
226: {
227: $|=1; # Try to send things immediately to stdout; err umm....
228: # Tell the user about the /tmp/loncapa_rpm_updates directory.
229: print($out '**** NOTE **** '.
230: 'To check the status of the download, you can '.
231: 'periodically inspect the contents of the '.
232: '/tmp/loncapa_rpm_updates directory. '.
233: 'Please be patient; this download may take a while.'.
234: "\n");
235: # Do the download.
236: print($out `$checkcommand $FTPUPDATES 2>\&1`);
237: # Tell the user about what action they need to take with the
238: # downloaded RPMs.
239: print($out
240: 'You may now wish to visit the /tmp/loncapa_rpm_updates'.
241: ' directory and upgrade the RPMs. '."\n".
242: 'If this is a critical server (it is currently being'.
243: ' used for classes) and you do not know how to upgrade'.
244: ' RPMs, you should consult someone who has experience '.
245: 'with the "rpm" command.'."\n");
246: clean_exit($mode,$out,0); # Assume everything is okay and exit.
247: }
248: @rpms=`$checkcommand $FTPUPDATES 2>\&1`; # Read in list of RPMs.
249: # Create a text string that can be pattern matched.
250: my $rpmtext=join('',@rpms);
251: if ($rpmtext=~/You do not seem to have a/) # No www?
252: {
253: print($out "You do not have a 'www' user on your system.\n".
254: "Please add this user and try this command again.\n");
255: clean_exit($mode,$out,0);
256: }
257: if ($rpmtext=~/This account is currently not/) # ------------ uh-oh
258: {
259: print($out "...strange error, moving on ($FTPSERVER)\n");
260: }
261: else # --------------------------------------- the output is "good"
262: {
263: $goodoutput=$rpmtext;
264: unless (@rpms) # If there are no RPMs to update.
265: {
266: $reallygoodoutput = <<END;
267: **** NOTE **** All RPMS on your system appear to be up to date.
268: END
269: $goodoutput = ' ';
270: }
271: last SERVERLOOP;
272: }
273: }
274: print($out '...cannot establish an ftp session with '.$FTPSERVER."\n");
275: }
276: else
277: {
278: print($out "...cannot find $FTPSERVER on the network\n");
279: }
280: }
281: if (!$goodoutput) # If never received any useable output, assume "no server".
282: {
283: print($out '**** ERROR **** Cannot find a working ftp server.'."\n");
284: clean_exit($mode,$out,0);
285: }
286: elsif ($reallygoodoutput) # Everything is peachy keen and up-to-date already.
287: {
288: print($out $reallygoodoutput);
289: }
290: else # There are RPMs that need to be updated; show list to user.
291: {
292: my $rpmcount=scalar(@rpms); # Count up size of RPM list.
293: print($out <<END); # Print out an advisory warning to user.
294: **** WARNING **** You need to update at least $rpmcount RPMS shown in
295: the list below. THIS IS IMPORTANT FOR SECURITY.
296:
297: END
298: print($out $goodoutput); # Output the RPM list.
299: if ($mode eq 'interactive')
300: {
301: print($out <<END);
302: Do you want to download the RPMs listed above (y/n)?
303: END
304: my $in=<>;
305: if ($in=~/^y/)
306: {
307: print($out 'Please be patient... downloading into '.
308: '/tmp/loncapa_rpm_updates'."\n");
309: print($out `perl $command_name --download`);
310: clean_exit($mode,$out,0);
311: }
312: }
313: print($out <<END); # Output instructions to user about taking action.
314:
315: Please visit ftp://$FTPUPDATES
316: and download the RPMS you need.
317: For instructions on working with (and upgrading) RPMS, please
318: visit http://www.rpm.org/max-rpm/.
319: To automatically download these RPMs to /tmp/loncapa_rpm_updates/,
320: run the CHECKRPMS_custom command as "./CHECKRPMS_custom --download"
321: END
322: if ($mode eq 'cronmail')
323: {
324: print($out <<END); # Output more instructions to user.
325: CHECKRPMS_custom should be located in /usr/local/CHECKRPMS/bin/.
326: END
327: }
328: }
329:
330: clean_exit($mode,$out,0);
331:
332: # ================================================================ Subroutines.
333:
334: sub clean_exit
335: {
336: my ($mode,$out,$code)=@_;
337:
338: if ($mode eq 'cronmail') # If cronmail mode, then mail LON-CAPA sys admin.
339: {
340: close(FOUT);
341:
342: # Read in configuration to get e-mail addresses.
343: my $perlvarref = read_conf('loncapa.conf');
344: my %perlvar = %{$perlvarref};
345: undef $perlvarref;
346: delete $perlvar{'lonReceipt'}; # remove since sensitive
347: delete $perlvar{'lonSqlAccess'}; # remove since sensitive
348:
349: # Set metadata for the e-mail.
350: my $emailto = "$perlvar{'lonAdmEMail'}";
351:
352: my $subj=$perlvar{'lonHostID'}.', RPMS to upgrade';
353:
354: # Make the e-mail's subject header to describe whether up-to-date.
355: if ($reallygoodoutput)
356: {
357: $subj = 'happy_lon: '.$subj; # Machine is up-to-date.
358: }
359: else
360: {
361: $subj = 'ALERT_lon: '.$subj; # There are out-of-date RPMs.
362: }
363:
364: # Send the e-mail.
365: system(
366: 'metasend -b -t '.$emailto.' -s '.
367: "'$subj' -f /tmp/CHECKRPMS.$$ -m text/plain");
368: }
369:
370: print($out <<END) if $mode eq 'html'; # If html mode, print ending tags.
371: </pre>
372: </body>
373: </html>
374: END
375: exit($code);
376: }
377:
378: sub terminate
379: {
380: my ($mode,$out,$output);
381: if ($mode eq 'html')
382: {
383: print($out <<END);
384: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
385: "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
386: <html>
387: <head>
388: <meta http-equiv="Content-Type" content="text/html; charset=utf-8"></meta>
389: <title>CHECKRPMS ERROR</title>
390: </head>
391: <body bgcolor="white">
392: <h1>CHECKRPMS ERROR</h1>
393: <hr />
394: <p><font color="red"><font size="+1">
395: END
396: }
397: print($out $output);
398: if ($mode eq 'html')
399: {
400: print($out <<END);
401: </font></font></p></body></html>
402: END
403: }
404: }
405:
406:
407: # - read_conf: read LON-CAPA server configuration, especially PerlSetVar values
408: sub read_conf
409: {
410: my (@conf_files)=@_;
411: my %perlvar;
412: $perlvar{'lonAdmEMail'} = $cronmailaddress;
413: $perlvar{'lonHostID'} = `hostname`;
414: chomp($perlvar{'lonHostID'});
415: my $perlvarref=\%perlvar;
416: return ($perlvarref);
417: }
418:
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