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IcculusFinger_daemon.pl
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IcculusFinger_daemon.pl
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#!/usr/bin/perl -w -T
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#-----------------------------------------------------------------------------
#
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# Copyright (C) 2002 Ryan C. Gordon (icculus@icculus.org)
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#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
#-----------------------------------------------------------------------------
#-----------------------------------------------------------------------------
# Revision history:
# (1.0 series comments removed. Check the download archives if you need them.)
# 2.0.0 : Rewrite into an actual finger daemon. MILLIONS of changes.
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# 2.0.1 : Fixed > and < conversion.
# MUCH better Lynx support (thanks, Chunky_Ks)
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# Added an "embed" arg.
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# changed \r and \n in protocol chatter to \015 and \012.
# Made syslogging optional.
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# Added "root" as a fakeuser.
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# 2.0.2 : Added "time" and "ipaddr" fakeusers.
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# 2.0.3 : Added "linkdigest" arg, and made it the default for text output.
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# 2.0.4 : Added "noarchive" tagblocks and optional "plan written on"
# date/time output.
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# 2.0.5 : Can now run as a full daemon, without inetd. Bunch of secutity
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# cleanups, and enables taint mode (-T). Input can now timeout, so
# connections can't be hogged indefinitely anymore.
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# 2.0.6 : Some syslogging added, minor fix in input reading.
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# Zombie processes are cleaned up reliably, even under heavy load.
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# 2.1.0 : Added .planfile digest generation. Not hooked up to daemon yet,
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# just works from the command line. (Thanks to Gary "Chunky Kibbles"
# Briggs for the suggestion and patches!)
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# 2.1.1 : Disabled the email URLizer for now. Added an "uptime" fakeuser.
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# 2.1.2 : Centering, based on 80 columns, in text output, digest is now
# sorted correctly. (Thanks, Gary!) Daemon now select()s on the
# listen socket so it can timeout and do the .planfile digest. Other
# cleanups and fixes in the daemon code.
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# 2.1.3 : Make sure .plan digest doesn't skips users with identical update
# times.
# 2.1.4 : Moved plan digest hashing to separate function (hashplans()),
# added RSS digest (thanks, zakk!), and unified them in do_digests().
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# Digests can have a maximum user output now.
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# 2.1.5 : Fixes from Gary Briggs: Fixed a regexp, made line before ending
# text format better, fixed centering on Lynx.
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# 2.1.6 : Fix from Gary Briggs: undef'd variable reference.
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# 2.1.7 : Fix from Gary Briggs: do some text output for [i], [b], and [u]
# markup tags when not in HTML mode.
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# 2.1.8 : Fix from Gary Briggs: IcculusFinger_planmove.pl now handles
# moves across filesystems.
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# 2.1.9 : Security fixes in request parsing and syslog output by Chunky and
# Primer.
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# 2.1.10: Changes by Gary Briggs: Added local file parsing for specific
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# situations, made image text more useful. Added support for
# stylesheets, and [entry][/entry] tags
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# 2.1.11: Changes by Gary Briggs: Fixed div tag placement in $embed
# and plaintext
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#-----------------------------------------------------------------------------
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# !!! TODO: If an [img] isn't in a link tag, make it link to the image.
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use strict; # don't touch this line, nootch.
use warnings; # don't touch this line, either.
use DBI; # or this. I guess. Maybe.
use File::Basename; # blow.
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use IO::Select; # bleh.
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# Version of IcculusFinger. Change this if you are forking the code.
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my $version = "v2.1.10";
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#-----------------------------------------------------------------------------#
# CONFIGURATION VARIABLES: Change to suit your needs... #
#-----------------------------------------------------------------------------#
# This is a the hostname you want to claim to be...
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# This reports "Finger info for $user\@$host ..." in the web interface,
# and is used for listing finger requests to finger clients:
# "Finger $user?section=sectionname\@$host", etc.
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my $host = 'icculus.org';
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# This is the URL for fingering accounts, for when we need to generate
# URLs. "$url?user=$user§ion=sectionname".
my $base_url = 'http://icculus.org/cgi-bin/finger/finger.pl';
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# The processes path is replaced with this string, for security reasons, and
# to satisfy the requirements of Taint mode. Make this as simple as possible.
# Currently, the only thing that uses the PATH environment var is the
# "fortune" fakeuser, which can be safely removed.
my $safe_path = '/usr/bin:/usr/local/bin';
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# Turn the process into a daemon. This will handle creating/answering socket
# connections, and forking off children to handle them. This flag can be
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# toggled via command line options (--daemonize, --no-daemonize, -d), but
# this sets the default. Daemonizing tends to speed up processing (since the
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# script stays loaded/compiled), but may cause problems on systems that
# don't have a functional fork() or IO::Socket::INET package. If you don't
# daemonize, this program reads requests from stdin and writes results to
# stdout, which makes it suitable for command line use or execution from
# inetd and equivalents.
my $daemonize = 0;
# This is only used when daemonized. Specify the port on which to listen for
# incoming connections. The RFC standard finger port is 79.
my $server_port = 79;
# Set this to immediately drop priveledges by setting uid and gid to these
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# values. Set to undef to not attempt to drop privs. You will probably need
# to leave these as undef and run as root (risky!) if you plan to enable
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# $the use_homedir variable, below.
#my $wanted_uid = undef;
#my $wanted_gid = undef;
my $wanted_uid = 1056; # (This is the uid of "finger" ON _MY_ SYSTEM.)
my $wanted_gid = 971; # (This is the gid of "iccfinger" ON _MY_ SYSTEM.)
# This is only used when daemonized. Specify the maximum number of finger
# requests to service at once. A separate child process is fork()ed off for
# each request, and if there are more requests then this value, the extra
# clients will be made to wait until some of the current requests are
# serviced. 5 to 10 is usually a good number. Set it higher if you get a
# massive amount of finger requests simultaneously.
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my $max_connects = 10;
# This is how long, in seconds, before an idle connection will be summarily
# dropped. This prevents abuse from people hogging a connection without
# actually sending a request, without this, enough connections like this
# will block legitimate ones. At worst, they can only block for this long
# before being booted and thus freeing their connection slot for the next
# guy in line. Setting this to undef lets people sit forever, but removes
# reliance on the IO::Select package. Note that this timeout is how long
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# the user has to complete the read_request() function, so don't set it so
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# low that legitimate lag can kill them. The default is usually safe.
my $read_timeout = 15;
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# Set this to non-zero to log all finger requests via the standard Unix
# syslog facility (requires Sys::Syslog qw(:DEFAULT setlogsock) ...)
my $use_syslog = 1;
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# Set $use_homedir to something nonzero if want to read planfiles from the
# standard Unix location ("/home/$user/.plan"). Note that this is a security
# hole, as it means that either IcculusFinger must run as root to insure
# access to a user's homedir, or user's have to surrender a little more
# privacy to give a non-root user access to their homedirs. You should
# consider setting this to zero and reading the comments for $fingerspace,
# below. Note that IcculusFinger comes with a perl script for automating the
# moving of a system's planfiles from the the insecure method to the more
# secure $fingerspace method, including creating the symlinks so your users
# won't really notice a difference.
my $use_homedir = 0;
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# Set $files_allowed to allow someone to use a filename instead of a
# username. If you then ask for something of the form "./filename"
# it'll open the file instead of the user's .plan.
# Without good reason the correct setting for this option is 0, and
# anything other than a specific file in the current dir will fail to
# work properly
my $files_allowed = 0;
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# If you set $use_homedir to 0, this is the directory that contains the
# planfiles in the format "$fingerdir$username" Note that THIS MUST HAVE
# THE TRAILING DIR SEPARATOR! This is ignored if $use_homedir is NOT zero.
my $fingerspace = '/fingerspace/';
# This is the maximum amount of data that IcculusFinger will read from a
# planfile. If this cuts off in the middle of an opened formatting tag,
# tough luck. IcculusFinger reads the entire planfile (up to the max you
# specify here) into memory before processing tags. Theoretically, this could
# be changed to handle tags on the fly, in which case users that would
# otherwise be over the limit might not be after processing sections, etc,
# but this is not the case here and now.
# Note that images specified inside [img] tags, etc are not counted towards
# this limit (since the web browser would be requesting those images
# separately), and only applies to the max bytes to be read directly from the
# planfile. This is merely here to prevent someone from symlinking their
# planfile to /dev/zero or something that could fill all available memory.
# This value is specified in bytes.
my $max_plan_size = (100 * 1024);
# This is the maximum size, in bytes, that a finger request can be. This is
# to prevent malicious finger clients from trying to fill all of system
# memory.
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my $max_request_size = 512;
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# This is what is reported to the finger client if the desired user's planfile
# is missing or empty, or the user is unknown (we make NO distinction, for
# the sake of security and privacy). This string can use IcculusFinger
# markup tags (we'll convert as appropriate), but must NOT use HTML directly,
# since it will confuse the regular finger client users. You should not
# leave this blank or undef it, since that's confusing for everyone.
my $no_report_string = "[center][i]Nothing to report.[/i][/center]";
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# List at the bottom of the finger output (above wittyremark) when the .plan
# was last updated?
my $show_revision_date = 1;
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# This is the default title for the webpage. The user can override it with
# the [title] tag in their .plan file. Do not use HTML. You can specify an
# empty string (""), but not undef; however, you should REALLY have a
# default here...
my $title = "IcculusFinger $version";
# Alternately, you can populate this array with strings, and IcculusFinger
# will randomly pick one at runtime. Note that the user's [title] tags also
# land in here, so you are interfering with their ability to override the
# title if you add to this array. The $title variable above is used only if
# this array is empty, and thus gives you a comfortable default in case the
# user doesn't supply her own title. Do as you will.
my @title_array;
# If you are a content-Nazi, you can prevent the user's [title] tags from
# being included in the parsing.
my $permit_user_titles = 1;
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# If this array is empty, then no stylesheet is used unless a user
# specifies one and you're not a content Nazi. You can populate this
# if you wish.
my @style_array;
# Don't populate this.
my $style = "";
# If you are a content-Nazi, you can prevent the user's [style] tags from
# being included in the parsing.
my $permit_user_styles = 1;
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# This is printed after the credits at the bottom. Change it to whatever you
# like. Do not use HTML. You can specify an empty string (""), but undef
# doesn't fly here. The user can change this with [wittyremark] tags.
my $wittyremark = "Stick it in the camel and go.";
# Alternately, you can populate this array with strings, and IcculusFinger
# will randomly pick one at runtime. Note that the user's [wittyremark] tags
# also land in here, so you are interfering with their ability to override
# if you add to this array. The $wittyremark variable above is used only if
# this array is empty, and thus gives you a comfortable default in case the
# user doesn't supply her own content. Do as you will.
my @wittyremark_array;
# If you are a content-Nazi, you can prevent the user's [wittyremark] tags
# from being included in the parsing.
my $permit_user_wittyremarks = 1;
# You can screw up your output with this, if you like.
# You can append "?debug=1" to your finger request to enable this without
# changing the source.
my $debug = 0;
# This is the URL to where the script can be obtained. Feel free to change
# it if you you are forking the code, but unless you've got a good reason,
# I'd appreciate it if you'd leave my (ahem) official IcculusFinger webpage
# in this variable. Set it to undef to not supply a link at all in the
# final HTML output.
#my $scripturl = undef;
#my $scripturl = "/misc/finger.pl";
my $scripturl = "http://icculus.org/IcculusFinger/";
# This is only used in the HTML-formatted output.
# I'd prefer you leave this be, but change it if you must.
my $html_credits = (defined $scripturl) ?
"Powered by <a href=\"$scripturl\">IcculusFinger $version</a>" :
"Powered by IcculusFinger $version" ;
# This is only used in the plaintext-formatted output.
# I'd prefer you leave this be, but change it if you must.
my $text_credits = "Powered by IcculusFinger $version" .
((defined $scripturl) ? " ($scripturl)" : "");
# Set this to zero to disable planfile archive lookups.
my $use_database = 1;
# This is the host to connect to for database access.
my $dbhost = 'localhost';
# This is the username for the database connection.
my $dbuser = 'fingermgr';
# The database password can be entered in three ways: Either hardcode it into
# $dbpass, (which is a security risk, but is faster if you have a completely
# closed system), or leave $dbpass set to undef, in which case this script
# will try to read the password from the file specified in $dbpassfile (which
# means that this script and the database can be touched by anyone with read
# access to that file), or leave both undef to have DBI get the password from
# the DBI_PASS environment variable, which is the most secure, but least
# convenient.
my $dbpass = undef;
my $dbpassfile = '/etc/IcculusFinger_dbpass.txt';
# The name of the database to use once connected to the database server.
my $dbname = 'IcculusFinger';
# The name of the table inside the database we're using.
my $dbtable_archive = 'finger_archive';
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# This is the time, in minutes, to generate a digest webpage of all available
# finger accounts. The digest includes last updated time and a link to the
# web version of the .plan files. Set this to undef to disable this feature.
# Also, this only runs if we're daemonized (--daemonize commandline option).
# If you aren't daemonized, you can force a digest update by running
# this program from the command line with the --digest option...probably from
# a cronjob.
my $digest_frequency = 10;
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# Digests (html and rss) will show at most $digest_max_users plans, newest
# listed first. Five to ten is probably a good idea. undef to list all
# non-empty .planfiles.
#my $digest_max_users = undef;
my $digest_max_users = 10;
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# Filename to write finger digest to. "undef" will universally disable digest
# generation, from the daemon or command line. Note that this file is opened
# for writing _AFTER_ the program drops privileges, whether you run this from
# the command line or as a daemon.
my $digest_filename = '/webspace/icculus.org/fingerdigest.html';
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# Filename to write finger digest RSS to, "undef" will universally
# disable RSS digest generation, from the daemon or the command line. See
# other notes above.
my $digest_rss_filename = '/webspace/icculus.org/fingerdigest.rss';
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# Set this to a string you want to prepend to the finger digest. If you
# aren't planning to include the digest in another webpage via PHP or
# whatnot, you should put <html> and <title> tags, etc here. "undef" is
# safe, too.
#my $digest_prepend = undef;
my $digest_prepend = "<html><head><title>.plan digest</title></head><body>\n";
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# Set this to a url you want to set the about to
# for the finger digest RSS about field. Et cetera.
my $digest_rss_about = "http://icculus.org/fingerdigest.rdf";
# Set this to a title you want for the RSS
my $digest_rss_title = "icculus.org finger digest";
# Set this to the link you want for the finger digest (note that this
# relates to the RSS file linking to the actual piece of html, not
# itself)
my $digest_rss_url = "http://icculus.org/fingerdigest.html";
# Set this to the description for the RSS
my $digest_rss_desc = "finger updates from icculus.org users";
# Set this to the url for the RSS image
my $digest_rss_image = "http://icculus.org/icculus-org-now.png";
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# Set this to a string you want to append to the finger digest. If you
# aren't planning to include the digest in another webpage via PHP or
# whatnot, you should put <html> and <title> tags, etc here. "undef" is
# safe, too.
#my $digest_append = undef;
my $digest_append = "</body></html>\n";
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# These are special finger accounts; when a user queries for this fake
# user, we hand back the string returned from the attached function as if
# it was the contents of a planfile. Be careful with this, as it opens up
# potential security holes.
# These subs do NOT have a maximum size limit imposed by the
# $max_plan_size setting, above.
# This hash is checked before actual planfiles, so you can override an
# existing user through this mechanism.
my %fakeusers; # the hash has to exist; don't comment this line.
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# The elements of the hash, however, can be added and removed at your whim.
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$fakeusers{'fortune'} = sub {
return(`/usr/games/fortune`);
};
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$fakeusers{'uptime'} = sub {
my $uptime = `/usr/bin/uptime`;
$uptime =~ s/\A.*?(up \d+ days, \d+:\d+),.*\Z/$1/;
return('[center]' . $uptime . '[/center]');
};
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$fakeusers{'root'} = sub {
return("ph34r me, for i am root. I'm l33t as kittens.");
};
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$fakeusers{'time'} = sub {
return("At the sound of the beep, it will be: " . scalar localtime() .
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"\012\012\012\012 ...[u][b][i]BEEP.[/i][/b][/u]");
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};
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#$fakeusers{'admin-forcedigest'} = sub {
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# do_digests();
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# return('Digest dumped, nootch.');
#};
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# This works if run from qmail's tcp-env, and not tcpd.
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# also note that this is pretty useless for hits through the web
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# interface, since the webserver's IP will be reported, not the
# browser's IP.
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$fakeusers{'ipaddr'} = sub {
if (defined $ENV{'TCPREMOTEIP'}) {
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return("Your IP address appears to be $ENV{'TCPREMOTEIP'}");
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} else {
return(undef);
}
};
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#-----------------------------------------------------------------------------#
# The rest is probably okay without you laying yer dirty mits on it. #
#-----------------------------------------------------------------------------#
my $is_web_interface = 0;
my $do_html_formatting = 0;
my $browser = "";
my $wanted_section = undef;
my $output_text = "";
my $archive_date = undef;
my $archive_time = undef;
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my $list_sections = 0;
my $list_archives = 0;
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my $embed = 0;
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my $do_link_digest = undef;
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my $next_plan_digest = 0;
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sub get_sqldate {
my $mtime = shift;
my @t = localtime($mtime);
$t[5] = "0000" . ($t[5] + 1900);
$t[5] =~ s/.*?(\d\d\d\d)\Z/$1/;
$t[4] = "00" . ($t[4] + 1);
$t[4] =~ s/.*?(\d\d)\Z/$1/;
$t[3] = "00" . $t[3];
$t[3] =~ s/.*?(\d\d)\Z/$1/;
$t[2] = "00" . $t[2];
$t[2] =~ s/.*?(\d\d)\Z/$1/;
$t[1] = "00" . $t[1];
$t[1] =~ s/.*?(\d\d)\Z/$1/;
$t[0] = "00" . $t[0];
$t[0] =~ s/.*?(\d\d)\Z/$1/;
return('' . ($t[5]) . '-' . ($t[4]) . '-' . ($t[3]) . ' ' .
($t[2]) . ':' . ($t[1]) . ':' . ($t[0]));
}
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sub get_minimal_sqldate {
my $mtime = shift;
my @t = localtime($mtime);
$t[4] = "00" . ($t[4] + 1);
$t[4] =~ s/.*?(\d\d)\Z/$1/;
$t[3] = "00" . $t[3];
$t[3] =~ s/.*?(\d\d)\Z/$1/;
return('' . ($t[4]) . '/' . ($t[3]) );
}
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sub enumerate_planfiles {
my $dirname = (($use_homedir) ? '/home' : $fingerspace);
opendir(DIRH, $dirname) or return(undef);
my @dirents = readdir(DIRH);
closedir(DIRH);
my @retval;
if ($use_homedir) {
foreach (@dirents) {
next if (($_ eq '.') or ($_ eq '..'));
push @retval, "/home/$_/.plan";
}
} else {
foreach (@dirents) {
next if (($_ eq '.') or ($_ eq '..'));
push @retval, "$fingerspace/$_";
}
}
return(@retval);
}
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sub hashplans {
my %retval;
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my @plans = enumerate_planfiles();
if (not @plans) {
syslog("info", "Failed to enumerate planfiles: $!\n") if ($use_syslog);
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return(undef);
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}
foreach (@plans) {
my $user = $_;
if ($use_homedir) {
$user =~ s#\A/home/(.*?)/\.plan\Z#$1#;
} else {
$user = basename($_);
}
my @statbuf = stat($_);
my $filesize = $statbuf[7];
next if ($filesize <= 0); # Skip empty .plans
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# construct the hash backward for easy
# sorting-by-time in the next loop
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my $t = $statbuf[9];
$t++ while defined $retval{$t};
$retval{$t} = $user;
513
514
}
515
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520
521
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523
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525
526
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return(%retval);
}
sub do_digest {
return if not defined $digest_filename;
my %plansdates = hashplans();
return if (not %plansdates);
if (not open DIGESTH, '>', $digest_filename) {
if ($use_syslog) {
syslog("info", "digest: failed to open $digest_filename: $!\n");
}
return;
}
print DIGESTH $digest_prepend if defined $digest_prepend;
print DIGESTH "\n<p>\n ";
print DIGESTH "<table border=0>\n";
537
my $x = 0;
538
foreach (reverse sort keys %plansdates) {
539
540
my $user = $plansdates{$_};
my $modtime = get_minimal_sqldate($_);
541
my $href = "href=\"$base_url?user=$user\"";
542
print DIGESTH " <tr>\n";
543
print DIGESTH " <td align=\"right\"><a $href>$user</a></td>\n";
544
545
print DIGESTH " <td>$modtime</td>\n";
print DIGESTH " </tr>\n";
546
547
last if ((defined $digest_max_users) and (++$x >= $digest_max_users));
548
549
}
550
print DIGESTH " </table>\n</p>\n";
551
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553
print DIGESTH $digest_append if defined $digest_append;
close(DIGESTH);
}
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559
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562
563
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566
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577
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579
580
581
582
583
584
585
586
587
588
sub do_rss_digest {
return if not defined $digest_rss_filename;
my %plansdates = hashplans();
return if (not %plansdates);
if (not open RSS_DIGESTH, '>', $digest_rss_filename) {
if ($use_syslog) {
syslog("info", "digest: failed to open $digest_rss_filename: $!\n");
}
return;
}
print RSS_DIGESTH <<__EOF__;
<?xml version="1.0" encoding="utf-8"?>
<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
xmlns="http://purl.org/rss/1.0/">
<channel rdf:about="$digest_rss_about">
<title>$digest_rss_title</title>
<link>$digest_rss_url</link>
<description>$digest_rss_desc</description>
</channel>
<image>
<title>$digest_rss_title</title>
<url>$digest_rss_image</url>
<link>$digest_rss_url</link>
</image>
__EOF__
589
my $x = 0;
590
591
592
foreach (reverse sort keys %plansdates) {
my $user = $plansdates{$_};
my $modtime = get_minimal_sqldate($_);
593
my $href = "$base_url?user=$user";
594
595
596
597
print RSS_DIGESTH " <item rdf:about=\"$href\">\n";
print RSS_DIGESTH " <title>$user - $modtime</title>\n";
print RSS_DIGESTH " <link>$href</link>\n";
print RSS_DIGESTH " </item>\n\n";
598
599
last if ((defined $digest_max_users) and (++$x >= $digest_max_users));
600
601
602
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604
605
606
}
print RSS_DIGESTH "</rdf:RDF>\n\n";
close(RSS_DIGESTH);
}
607
608
609
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611
612
613
614
my $did_output_start = 0;
sub output_start {
my ($user, $host) = @_;
return if ((not $is_web_interface) and (not $do_html_formatting));
return if $did_output_start;
$did_output_start = 1;
615
print <<__EOF__ if not $embed;
616
617
618
619
<html>
<head>
<title> $title </title>
620
621
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623
624
625
__EOF__
print "<link rel=\"stylesheet\" href=\"$style\"
type=\"text/css\">" if(defined $style && length($style) > 0);
print <<__EOF__ if not $embed;
626
627
628
</head>
<body>
629
<div class="top">
630
631
<center><h1>Finger info for $user\@$host...</h1></center>
</div>
632
<hr>
633
634
__EOF__
635
636
637
print "<div class=\"content\">";
638
print "\n<pre>\n" if ($browser !~ /Lynx/);
639
640
641
642
643
}
sub output_ending {
644
if (($is_web_interface) or ($do_html_formatting) and ($browser !~ /Lynx/)) {
645
646
print(" </pre>\n");
}
647
648
649
if (($is_web_interface) or ($do_html_formatting)) {
print(" </div>\n");
}
650
651
652
return if $embed;
653
654
655
656
657
my $revision = undef;
if (($show_revision_date) and (defined $archive_date)) {
$revision = "When this .plan was written: $archive_date";
}
658
if ($do_html_formatting) {
659
660
$revision = ((defined $revision) ? "$revision<br>\n" : '');
661
print <<__EOF__;
662
<div class="bottom">
663
664
665
<hr>
<center>
<font size="-3">
666
$revision
667
668
669
670
$html_credits<br>
<i>$wittyremark</i>
</font>
</center>
671
</div>
672
673
674
__EOF__
} else {
675
$revision = ((defined $revision) ? "$revision\n" : '');
676
677
678
679
680
# Perl has no builtin max
my $maxlength = length($revision);
$maxlength = length($text_credits) if(length($text_credits)>$maxlength);
$maxlength = length($wittyremark) if(length($wittyremark)>$maxlength);
print "-" x $maxlength . "\n";
681
print "$revision\n" if (defined $revision);
682
683
684
685
686
687
688
689
690
691
692
693
694
print "$text_credits\n";
print "$wittyremark\n\n";
}
if (($is_web_interface) or ($do_html_formatting)) {
print(" </body>\n");
print("</html>\n");
print("\n");
}
}
sub parse_args {
my $args = shift;
695
696
if ((defined $args) and ($args ne '')) {
$args =~ s/\A\?//;
697
698
699
700
if ($args =~ s/(\A|&)web=(.*?)(&|\Z)/$1/) {
$is_web_interface = $2;
}
701
702
703
704
if ($args =~ s/(\A|&)html=(.*?)(&|\Z)/$1/) {
$do_html_formatting = $2;
}
705
706
707
708
if ($args =~ s/(\A|&)browser=(.*?)(&|\Z)/$1/) {
$browser = $2;
}
709
710
711
712
if ($args =~ s/(\A|&)debug=(.*?)(&|\Z)/$1/) {
$debug = $2;
}
713
714
715
716
717
if ($args =~ s/(\A|&)section=(.*?)(&|\Z)/$1/) {
$wanted_section = $2;
$wanted_section =~ tr/A-Z/a-z/;
}
718
719
720
721
if ($args =~ s/(\A|&)date=(.*?)(&|\Z)/$1/) {
$archive_date = $2;
}
722
723
724
725
if ($args =~ s/(\A|&)time=(.*?)(&|\Z)/$1/) {
$archive_time = $2;
}
726
727
728
729
if ($args =~ s/(\A|&)listsections=(.*?)(&|\Z)/$1/) {
$list_sections = $2;
}
730
731
732
733
if ($args =~ s/(\A|&)listarchives=(.*?)(&|\Z)/$1/) {
$list_archives = $2;
}
734
735
736
737
738
739
740
741
if ($args =~ s/(\A|&)embed=(.*?)(&|\Z)/$1/) {
$embed = $2;
}
if ($args =~ s/(\A|&)linkdigest=(.*?)(&|\Z)/$1/) {
$do_link_digest = $2;
}
742
743
}
744
745
746
# default behaviours that depend on output target...
$do_link_digest = !$do_html_formatting if (not defined $do_link_digest);
747
748
749
750
return($args);
}
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
sub get_database_link {
if (not defined $dbpass) {
if (defined $dbpassfile) {
open(FH, $dbpassfile) or return("failed to open $dbpassfile: $!\n");
$dbpass = <FH>;
chomp($dbpass);
$dbpass =~ s/\A\s*//;
$dbpass =~ s/\s*\Z//;
close(FH);
}
}
my $dsn = "DBI:mysql:database=$dbname;host=$dbhost";
$_[0] = DBI->connect($dsn, $dbuser, $dbpass) or
return(DBI::errstr);
return(undef);
}
sub load_archive_list {
771
my $user = shift;
772
773
774
my $link;
my $err = get_database_link($link);
return($err) if defined $err;
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
my $u = $link->quote($user);
my $sql = "select postdate from $dbtable_archive where username=$u" .
" order by postdate desc";
my $sth = $link->prepare($sql);
if (not $sth->execute()) {
$link->disconnect();
return "can't execute the query: $sth->errstr";
}
my @archivelist;
while (my @row = $sth->fetchrow_array()) {
push @archivelist, $row[0];
}
if ($#archivelist < 0) {
$output_text = ''; # will use $no_report_string.
} else {
$output_text = "Available archives:\n";
foreach (@archivelist) {
my ($d, $t) = /(\d\d\d\d-\d\d-\d\d) (\d\d:\d\d:\d\d)/;
$t =~ s/(..):(..):(..)/$1-$2-$3/;
if ($do_html_formatting) {
my $url = "$base_url?user=$user&date=$d&time=$t";
$output_text .= " \[link=\"$url\"\]$_\[/link\]\n";
} else {
$output_text .= " finger $user\@$host?&date=$d&time=$t\n";
}
}
}
$sth->finish();
$link->disconnect();
return(undef);
}
sub load_archive {
my $user = shift;
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
my $sqldate;
if (defined $archive_date) {
if ($archive_date =~ /\A\d\d\d\d-\d\d-\d\d\Z/) {
$sqldate = $archive_date;
} else {
return("Archive date must be in yyyy-mm-dd format.");
}
} else {
my @t = localtime(time());
$t[5] = "0000" . ($t[5] + 1900);
$t[5] =~ s/.*?(\d\d\d\d)\Z/$1/;
$t[4] = "00" . ($t[4] + 1);
$t[4] =~ s/.*?(\d\d)\Z/$1/;
$t[3] = "00" . $t[3];
$t[3] =~ s/.*?(\d\d)\Z/$1/;
$sqldate = '' . ($t[5]) . '-' . ($t[4]) . '-' . ($t[3]);
}
if (defined $archive_time) {
if ($archive_time =~ /\A(\d\d)-(\d\d)-(\d\d)\Z/) {
$sqldate .= " $1:$2:$3";
} else {
return("Archive date must be in hh-mm-ss format.");
}
} else {
$sqldate .= " 23:59:59"; # end of day.
}
844
845
846
my $link;
my $err = get_database_link($link);
return($err) if defined $err;
847
848
my $u = $link->quote($user);
849
850
my $sql = "select postdate, text from $dbtable_archive where username=$u" .
" and postdate<='$sqldate' order by postdate desc limit 1";
851
852
853
854
855
856
857
858
my $sth = $link->prepare($sql);
if (not $sth->execute()) {
$link->disconnect();
return "can't execute the query: $sth->errstr";
}
my @row = $sth->fetchrow_array();
if (not @row) {
859
$output_text = ''; # will use $no_report_string.
860
861
862
863
864
865
866
867
868
869
870
871
872
873
} else {
$row[1] =~ s/(\A.{0, $max_plan_size}).*\Z/$1/s;
$archive_date = $row[0];
$output_text = $row[1];
}
$sth->finish();
$link->disconnect();
return(undef);
}
sub load_file {
my $user = shift;
874
my $fname;
875
876
my $errormsg = undef;
877
878
879
880
881
if($files_allowed==1 && $user =~ /^\.\/[^\/]*$/) {
$fname = $user;
} else {
$fname = ($use_homedir) ? "/home/$user/.plan" : "$fingerspace/$user";
}
882
883
884
885
if (not -f "$fname") { # this is NOT an error.
$output_text = "";
} else {
886
my $modtime = (stat($fname))[9];
887
888
889
890
891
892
893
894
if (not open(FINGER, '<', "$fname")) {
$errormsg = "Couldn't open planfile: $!";
} else {
if (not defined read(FINGER, $output_text, $max_plan_size)) {
$errormsg = "Couldn't read planfile: $!";
}
close(FINGER);
}
895
896
$archive_date = get_sqldate($modtime);
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
}
return($errormsg);
}
sub verify_and_load_request {
my ($args, $user) = @_;
my $errormsg = undef;
if ((defined $args) and ($args ne '')) {
$errormsg = "Unrecognized query arguments: \"$args\"";
} elsif (not defined $user) {
$errormsg = "No user specified.";
} elsif ($user =~ /\@/) {
$errormsg = "Finger request forwarding is forbidden.";
913
} elsif (length($user) > 20) {
914
915
# The 20 char limit is just for safety against potential buffer overflows
# in finger servers, but it's more or less arbitrary.
916
917
$errormsg = "Bogus user specified.\n";
} elsif (($user =~ /[^A-Za-z0-9_]/) and ($files_allowed==0) ) {
918
# Anything other than A-Za-z0-9_ is probably not a username.
919
$errormsg = "Bogus user specified.\n";
920
921
922
} elsif (($user !~ /(\.\/)?[^\/]+/) and ($files_allowed==1) ) {
# If we're allowing files, then allow a "./" prefix but no other "/"s
$errormsg = "Bogus user or file specified.\n";
923
924
925
926
} else {
if (defined $fakeusers{$user}) {
$output_text = $fakeusers{$user}->();
}
927
elsif ($list_archives) {
928
$errormsg = load_archive_list($user);
929
}
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
elsif ((defined $archive_date) or (defined $archive_time)) {
$errormsg = load_archive($user);
} else {
$errormsg = load_file($user);
}
}
if (defined $errormsg) {
output_start($user, $host);
print " <center><h1>" if $do_html_formatting;
print "$errormsg";
print "</h1></center>" if $do_html_formatting;
print "\n";
output_ending();
return(0);
}
return(1);
}
sub do_fingering {
my ($query_string, $user) = @_;
953
my @link_digest;
954
955
956
957
958
959
960
961
962
963
if ($debug) {
$title = "debugging...";
output_start($user, $host);
print("WARNING: Debug output is enabled in this finger request!\n");
print("Original query string: \"$query_string\"\n");
print("fingering $user ...\n");
print("HTML formatting: $do_html_formatting ...\n");
print("Is web interface: $is_web_interface ...\n");
print("Browser: $browser ...\n");
964
965
print("Embedding: $embed ...\n");
print("Doing link digest: $do_link_digest ...\n");
966
967
968
969
970
971
}
if ((not defined $output_text) or ($output_text eq "")) {
$output_text = $no_report_string;
}
972
973
974
975
976
# Change [style][/style] tags.
while ($output_text =~ s/\[style\](.*?)\[\/style\](\r\n|\n|\b)//is) {
push @style_array, $1 if $permit_user_styles;
}
977
978
979
980
981
982
983
984
985
986
# Change [title][/title] tags.
while ($output_text =~ s/\[title\](.*?)\[\/title\](\r\n|\n|\b)//is) {
push @title_array, $1 if $permit_user_titles;
}
# Change [wittyremark][/wittyremark] tags.
while ($output_text =~ s/\[wittyremark\](.*?)\[\/wittyremark\](\r\n|\n|\b)//is) {
push @wittyremark_array, $1 if $permit_user_wittyremarks;
}
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
# !!! FIXME: Make this a separate subroutine?
if ($list_sections) {
my @sectionlist;
while ($output_text =~ s/\[section=\"(.*?)\"\](\r\n|\n|\b)(.*?)\[\/section\](\r\n|\n|\b)/$3/is) {
push @sectionlist, $1;
}
$output_text = "Available sections:\n";
if ($do_html_formatting) {
foreach (@sectionlist) {
my $url = "$base_url?user=$user§ion=$_";
$output_text .= " \[link=\"$url\"\]$_\[/link\]\n";
}
} else {