#!/usr/bin/perl -w # For Emacs: -*- mode:cperl; mode:folding; -*- # # Get a machine's critical features, And mail/http them to the Linux Counter # # (c) 1999 - Harald Tveit Alvestrand, the Linux Counter Project # 2003 - PetaMem Group (www.petamem.com) # License: GNU Copyleft - see bottom of file. # Changelog: see even more bottom of the file # # As a matter of courtesy, if you change this file on your own, # make sure it does NOT mail to the counter! # use strict; use POSIX; our $VERSION = '0.20'; our $CVS_VERSION = '$Revision: 1.25 $ $Date: 2003/12/28 23:59:48 $ $Author: hta $'; our $IsInTestHarness; use vars qw(%values %oldvalues $errordata $debugdata); # data that is sent use vars qw($progname %option); use vars qw(%is_sys_account %is_user %is_account); # Some variables are for internal use, and never prompted for in # the loop of askquestions our %dontask = ('uniqueid' => 1, # Internal use 'manual' => 1, 'method' => 1, 'owner' => 1, # These 2 are always prompted for 'key' => 1, 'uptime' => 1, # We think we know how to get these ); # stuff that controls defaults for passwdscan & accounts subroutines my ($UID_MIN, $UID_MAX, $got_defs) = (100, 65533, ''); # Make sure nothing happens, so that the script's routines # can be debugged from another file return 1 if($IsInTestHarness); &preparation; &options; &readfile; &checkconfig; if ($option{ask}) { &askquestions; } else { ©manuals; } &writefile; &sendfile; # {{{ preparation # sub preparation { die "No HOME environment variable\n" if (!$ENV{HOME}); die "No home diretory\n" if ! -d $ENV{HOME}; my $infodir = "$ENV{HOME}/.linuxcounter"; if (! -d $infodir) { mkdir($infodir, 0766) || die "Unable to make $infodir\n"; } # Keep track of where I am; need it to install crontab entry # progname is a global. $progname = $0; if ($progname !~ /^\//) { my $progdir = `pwd`; chop $progdir; $progname = "$progdir/$progname"; $progname =~ s!/./!/!; } chdir($infodir) || die "Unable to change to $infodir\n"; my ($sysname, $nodename, $release, $version, $machine ) = POSIX::uname(); if (! -f $nodename) { print STDERR "Machine-update $VERSION. Use $0 -l to display license.\n"; print STDERR "Creating the infofile for your computer.\n"; # Create the infodir open(INFO, ">$nodename"); print INFO "uniqueid: ", randomnumber(), "\n"; close INFO; } srand time % $$; # do some seed "randomization" } # }}} # {{{ options # sub options { my $opt; while (defined($ARGV[0]) && $ARGV[0] =~ /^-/) { $opt = shift @ARGV; $opt =~ /c/ && &installcrontab; $opt =~ /d/ && $option{DEBUG}++ && print STDERR "Debug is $option{DEBUG}\n"; $opt =~ /h/ && &help; $opt =~ /i/ && ($option{ask} = 1); $opt =~ /l/ && &license; $opt =~ /m/ && ($option{mail} = 1); $opt =~ /t/ && ($option{mail} = 0); $opt =~ /u/ && &uninstallcrontab; $opt =~ /v/ && die "\n\t Linux Counter machine-update version $VERSION\n" . "\tCVS version $CVS_VERSION\n"; $opt =~ /x/ && ($option{info} = 1); } } # }}} # {{{ askquestions # sub askquestions { return if ! -t STDIN || ! -t STDOUT; $| = 1; print "Here you can specify some info that the script can't know for itself\n"; $values{owner} = askone("Your Linux Counter reg#, if any", $values{owner}); $values{key} = askone("Your machine's counter reg#, if any", $values{key}); print "Here is what the program has found:\n"; for my $key (keys(%values)) { if (!$dontask{$key}) { printf "%-10s%1s: %s\n", $key, $dontask{$key}?"*":" ", $values{$key}; } } my $domore = &askone('Do you want to override some of the found values?', 'no'); if ($domore =~ /^Y/i) { my $manual; for my $key (keys(%values)) { next if $dontask{$key}; my $value = &askone($key, $oldvalues{$key}, $values{$key}); if ($values{$key} eq $value) { # go to automatic &Debug("auto value: $key\n"); } else { &Debug("still manual value: $key\n"); $manual .= " $key"; } $values{$key} = $value; } $values{manual} = $manual; } else { delete $values{manual}; } } # }}} # {{{ askone # sub askone { my $prompt = shift; my $default = shift; my $probed = shift; print $prompt; if (!defined($default) && defined($probed)) { $default = $probed; } if (defined($default)) { print " [$default]"; } if (defined($probed) && $probed ne $default) { print "(program found $probed)"; } print ':'; my $ans = <STDIN>; chop $ans; &Debug("Answer was $ans\n"); $ans = $default if (!length($ans)); return $ans; } # }}} # {{{ copymanuals # sub copymanuals { my %keeps = map {$_ => 1} split(' ', $values{manual}); &Debug('Keeping '.join(' ', keys(%keeps))."\n"); for my $key (keys(%keeps)) { $values{$key} = $oldvalues{$key}; } } # }}} # {{{ readfile # sub readfile { my ($sysname, $nodename, $release, $version, $machine ) = POSIX::uname(); open(INFO, $nodename) || die "Did not find infofile $nodename\n"; while (<INFO>) { chop; s/#.*//; if (/^(\S+): *(.+)/) { &Debug("Read $1: $2\n"); $values{$1} = $2; } else { print STDERR "Unparsed info line: $_ - discarded\n"; } } close INFO; %oldvalues = %values; } # }}} # {{{ writefile # sub writefile { my ($sysname, $nodename, $release, $version, $machine ) = POSIX::uname(); open(INFO, ">$nodename.new"); for my $val (sort keys(%values)) { &Debug("Saving $val: $values{$val}\n"); print INFO "$val: $values{$val}\n"; } close INFO; rename("$nodename.new", $nodename) || die "Rename failed\n"; } # }}} # {{{ sendfile # sub sendfile { if ($option{mail}) { open(MAIL, "|/usr/lib/sendmail machine-registration\@counter.li.org") || die "Unable to open sendmail\n"; } else { warn "--------------------------------------------------------\n"; warn "This is what will be sent to the Linux Counter if you\n"; warn "run the program with the -m switch. Now, NOTHING IS SENT\n"; warn "--------------------------------------------------------\n"; open(MAIL, ">&STDOUT"); } # note that $ENV{USER} isn't (always) set in a cron job... my $user = (getpwuid($<))[0]; $user = "unknown-id-$<" if !$user; print MAIL <<EOF From: $user To: machine-registration\@counter.li.org Subject: machine-update for $values{name} //MACHINE EOF ; for my $val (sort keys(%values)) { print MAIL "$val: $values{$val}\n" if length($values{$val}) > 0; } print MAIL "//END\n"; # Attach possible other info if ($errordata) { print MAIL "----- Problem info gathered during probing -----\n"; print MAIL $errordata; } $option{info} && do { print MAIL "----- Debug data for the script maintainer's aid -----\n"; print MAIL $debugdata; }; close MAIL; } # }}} # {{{ randomnumber # sub randomnumber { return int(rand(1_000_000_000)); } # }}} # {{{ checkconfig # sub checkconfig { my ($sysname, $nodename, $release, $version, $machine ) = POSIX::uname(); warn "This is not Linux, but $sysname!\n" if($sysname ne 'Linux'); $values{method} = "machine-update version $VERSION"; $values{os} = $sysname; $values{kernel} = $release; $values{cpu_uname} = $machine; $values{name} = $nodename; # First order guess # Credit for some of the code below goes to # Denis Havlik: <havlik@ap.univie.ac.at> # Blame is, of course, all mine - HTA - # Note - there are numerous problems with df, including: # - early versions don't support the -l option # - at least some include SAMBA filesystems in the -l option open (TMP,"df -l -x shm |"); # exclude shmfs, its 50% of RAM (mostly) my $HD = 0; while (<TMP>) { my @line = split(/\s+/); ($line[0] =~ /\/dev/) && ($HD += $line[1]); } &Debug("$HD kbytes of disk found\n"); $HD /= 1024; $values{disk} = sprintf("%d", $HD); $values{accounts} = &accounts; $values{users} = &active_users; my $uptime = &xbin('uptime'); if($uptime) { $uptime = `$uptime`; # get the uptime string here (could be more elegant, but so it is # robust against various localizations) if ($uptime =~ /^\s+[^\s]+\s+[^\s]+\s+([^,]+), /) { $values{uptime} = $1; } else { &ErrorInfo("Can't parse uptime output: $uptime\n"); } if ($option{info}) { &DebugInfo("***** Uptime output *****\n$uptime"); } } # Not sure this is a Right Thing...so not saving it for the moment # This section based on a patch from Mark-Jason Dominus <mjd@plover.com> # try to guess mailer based on content of /usr/lib/sendmail link if (-l '/usr/lib/sendmail') { my $realsendmail = readlink('/usr/lib/sendmail'); if ($realsendmail eq '../sbin/sendmail') { $realsendmail = '/usr/sbin/sendmail'; if (-l $realsendmail) { $realsendmail = readlink($realsendmail); } } if ($realsendmail =~ m{^/var/qmail}) { $values{mailer} = "qmail"; } else { &DebugInfo("Found sendmail as a link to $realsendmail\n"); } } # Link method did not work. Try to guess based on presence of # config files. (this is more susceptible to the old-junk problem) if (!$values{mailer}) { if ( -d '/var/qmail') { $values{mailer} = 'qmail'; } elsif ( -f '/etc/sendmail.cf') { $values{mailer} = 'sendmail'; } elsif ( -d '/etc/postfix') { $values{mailer} = 'postfix'; } } # forget about /proc/kcore: It's not reliable above 960MB. It also doesn't show # real memory, because some may be eaten by graphics # forget also about the "free" command: We don't want to be dependant on that $values{memory} = int(&getval_from_file('/proc/meminfo',1,1) / (1024*1024)); # But actually: Shouldn't we return the total of virtual memory here? Seems to # be relevant to me - RJ - &cpuinfo; } # }}} # {{{ cpuinfo # sub cpuinfo { my $cpufile = '/proc/cpuinfo'; # Linux: Place to get info on CPU my %interesting = (# 2.0 and 2.2 kernels 'bogomips' => '+bogomips', 'processor' => '1+processors', 'vendor_id' => 'cpu_vendor', # 2.0 kernels 'cpu' => 'cpu_only', 'model' => 'cpu_model', 'model name' => 'cpu_model_name', # 2.2 kernels 'cpu MHz' => 'cpu_mhz', 'cpu family' => 'cpu_family', # from an Alpha processor 'cycle frequency [Hz]' => 'cpu_hz', 'BogoMIPS' => '+bogomips', 'cpu model' => 'cpu_model', 'system type' => 'cpu_system_type', 'cpus detected' => 'processors', # from a PowerMAC 'machine' => 'cpu_machine', 'clock' => 'cpu_clock', 'motherboard' => 'cpu_motherboard', # from an UltraSparc 'BogoMips' => '+bogomips', 'ncpus active' => 'processors', ); # Zero out the accumulative values $values{bogomips} = 0; $values{processors} = 0; if (open (TMP,"<$cpufile")) { &DebugInfo("**** Contents of $cpufile ****\n"); while (<TMP>) { &DebugInfo($_); # Save /proc/cpuinfo to debugdata if -d chop; # A bizarre selection of names are "interesting". # Make a data-driven pick routine if (/^(\S+[^:]+\S)\s+: /) { my $name = $1; my $value = $'; if ($interesting{$name}) { if ($interesting{$name} =~ /^\+/) { $values{$'} += $value; } elsif ($interesting{$name} =~ /^1\+/) { $values{$'}++; } else { $values{$interesting{$name}} = $value; } } } } } else { &ErrorInfo("Could not open $cpufile\n"); } } # }}} # {{{ accounts # sub accounts { my $s; my $niss; my $ypcatbin; # will hold path to the ypcat binary (if any) open (TMP,"</etc/passwd"); $s += &passwdscan; &DebugErr("Found $s accounts total\n"); &Debug("Switching to NIS passwords\n"); $ypcatbin = &xbin('ypcat'); # get path to ypcat binary (empty if none) if($ypcatbin) { # test whether ypcat was found open TMP, "$ypcatbin passwd 2> /dev/null|" || ($errordata .= "ypcat failed: $!\n"); $niss = &passwdscan; $s += $niss; close TMP; &Debug("Status of ypcat: $?\n"); &DebugErr("Found $niss accounts in ypcat passwd\n"); } &DebugErr('Sysaccounts: ', join(' ', keys(%is_sys_account)), "\n"); &DebugErr("Found $s accounts total\n"); return $s; } # }}} # {{{ passwdscan # sub passwdscan { # Code for reading login.defs courtesy of Vassilii Khachaturov # <vassilii@tarunz.org> local (*DEFS); # Try importing UID_MIN and UID_MAX from /etc/login.defs, if possible # else just assume the above defaults for min and max non-system UID if (!$got_defs && open (DEFS, '/etc/login.defs')) { while (<DEFS>) { if (/^\s*(UID_(?:MIN|MAX))\s+(\d+)/) { # elegant, but not compatible with "strict refs": #${ $1 } = $2; if ($1 eq "UID_MIN") { $UID_MIN = $2; } else { $UID_MAX = $2; } &Debug("DEFS match: $1 = $2\n"); } } close (DEFS); $got_defs = 1; } &Debug("UID_MIN = $UID_MIN, UID_MAX = $UID_MAX\n"); # I suppose this is as good as it gets - # Usually user accounts have UID > 100 and # "system accounts" have UID < 100, but there is no guarantee # that # this will hold for pseudo-users like "postgress" etc. # Also nobody is usually 99 on linux, but -1 on "standard" unices. # RedHat places the dividing line at 500. Others use 400... my @line; my $s = 0; while (<TMP>) { @line = split ':'; if ($line[2] >= $UID_MIN && $line[2] <= $UID_MAX && !($line[0] eq 'nobody')) { $s++; $is_account{$line[0]} = 1; } else { $is_sys_account{$line[0]} = 1; } } return $s; } # }}} # {{{ active_users # # This is kind of alpha, but please test it. # It calculates the number of "active" users based on the "wtmp" entries # unfortunately at least Mandrake 8 and 9 ship with non-world-read wtmp # and non-set-uid last, so this does not work any more... # # RJ: Actually I think the best thing to do is to bury this code and be silent about it. # sub active_users { my $userslisted; for (qw(reboot wtmp runlevel)) { # This sysaccounts shouldn't be counted. Who else? $is_sys_account{$_} = 1; } open( TMP, "/usr/bin/last 2>&1|"); while (<TMP>) { chop; if (m!/var/log/wtmp: Permission denied!) { # RJ: ***Boom*** on every non-EN system &ErrorInfo("/usr/bin/last failed because /var/log/wtmp isn't readable\n"); last; } last if(!$_); # RJ: quick hack to safe bad code from harm my @tmp = split; my $name = $tmp[0]; if ($is_sys_account{$name}) { # do nothing } elsif (defined $is_account{$name}) { $is_user{$name} = 1; } elsif (/^\s*$/) { # blank line - do nothing } elsif ($#tmp == 9) { # OK line, but unknown user $option{DEBUG} && do { if (!$userslisted) { print STDERR 'Know users are: ', join(' ', keys(%is_account)), "\n"; $userslisted = 1; } print STDERR "Unknown user: $name\n"; } } else { &DebugErr("Strange line: $_\n"); } } close TMP; my $i = 0; for (sort keys %is_user) { $option{DEBUG} && printf "Active user %3d: %s\n", ++$i, $_; } &Debug("$i active users found.\n"); return $i; } # }}} # {{{ installcrontab # sub installcrontab { my $hour = int(rand(24)); my $min = int(rand(60)); my $day = int(rand(7)); # Weekday. This version runs once a week. my $cron; warn "Installing start of script into your crontab\n"; if (open(CRON, "crontab -l |")) { &Debug("Checking crontab for machine-update\n"); &Debug("Want to install as $progname\n"); while (<CRON>) { if (/^#/ && $. <= 3) { # initial comment &Debug("Skipping comment: $_"); next; } if (/machine-update/) { if (/ $progname -m/) { die "Crontab entry already installed: $_\n"; } else { die "Another entry with machine-update: $_\n"; } } $cron .= $_; } close CRON; &Debug("Result from crontab -l: ", $? / 256, "\n"); if ($? == 0) { &Debug("Crontab successfully read\n"); } elsif ($? == 256) { warn "You don't seem to have a crontab. I will create one.\n"; } else { die "Failed to read your crontab. Please report this as a bug: $?\n"; } } else { &Debug("Result from crontab open(): $?\n"); die "Unable to execute crontab command. Please check your system\n"; } open(CRON, "|crontab -"); print CRON $cron; print CRON "$min $hour * * $day $progname -m\n"; close CRON; &Debug("Result from crontab: $?\n"); if ($?) { die(<<EoF); Installing new crontab failed. YOUR CRONTAB MAY BE DAMAGED - use crontab -l to check it. Here's its former content (if any): $cron EoF } print "Crontab entry successfully installed.\nWill run on day $day of every week, at $hour:$min\n"; exit 0; } # }}} # {{{ uninstallcrontab # sub uninstallcrontab { my $found = 0; my $cron; print STDERR "Removing $progname from your crontab\n"; open(CRON, "crontab -l |"); &Debug("Checking crontab for machine-update\n"); &Debug("Want to uninstall as $progname\n"); while (<CRON>) { if (/^#/ && $. <= 3) { # initial comment &Debug("Skipping comment: $_"); next; } if (/machine-update/) { if (/ $progname -m/) { print STDERR "Crontab entry found and removed\n"; $found = 1; next; # skip stuff at end.... } else { die "Another entry with machine-update: $_\nUninstall manually?\n"; } } $cron .= $_; } close CRON; &Debug("Result from crontab -l: $?\n"); if ($?) { die "Failed to read your crontab. You may not have one?\n"; } if ($found) { open(CRON, "|crontab -"); print CRON $cron; close CRON; &Debug("Result from crontab: $?\n"); if ($?) { die(<<EoF); Installing new crontab failed. YOUR CRONTAB MAY BE DAMAGED - use crontab -l to check it. Here's its former content (if any): $cron EoF } } else { print STDERR "No instance of $progname found in your crontab\n"; } exit 0; } # }}} # {{{ xbin execute a linux binary # # This sub is to execute a linux binary robustly. i.e. testing # whether it is present, where it is present, whether it is executable # sub xbin { my $bin = shift; # get name of binary to execute $bin = `which $bin`; # determine binarys full path chomp $bin; return $bin if(-x $bin); # if there and executable: all is well - return it if(!$bin) { # if not there &Debug("No $bin found\n"); # state so } else { # there but not executable &Debug("$bin found, but not executable\n"); } return ''; # so return an empty string (binary will not exec) } # }}} # {{{ getval_from_file get value from system file @ row,col # sub getval_from_file { my $file = shift; my $row = shift; my $col = shift; my @file; my @cols; if (!(-r $file)) { &DebugErr("File $file not readable\n"); return ''; } sysopen(FH,$file, O_RDONLY); @file = <FH>; # read whole file to array close FH; @cols = split /\s+/, $file[$row]; # get the right row return $cols[$col]; # return the right column } # }}} # {{{ Debug print debug information if flag is set # sub Debug { $option{DEBUG} && print @_; } # }}} # {{{ DebugErr print debug on STDERR if flag is set # sub DebugErr { $option{DEBUG} && print STDERR @_; } # }}} # {{{ ErrorInfo sub ErrorInfo { $errordata .= join('', @_); } # }}} # {{{ DebugInfo sub DebugInfo { $option{info} && ($debugdata .= join('', @_)); } # }}} # {{{ help print help & exit # sub help { my $host = `uname -n`; print <<EoF; machine-update version $VERSION Send machine information to the Linux Counter USE: machine-update [-i] [-(t|d|l|m|v|x|c|u|h)] SWITCHES: -i = interactive -t = test (do not send e-mail, just print it ot STDOUT - default) -d = debug (test, and print additional debug informations) -l = display license -m = mail results to linux-counter -v = print version and exit -x = send extra info to server (Debug) -c = install crontab entry -u = uninstall crontab entry -h = print usage information and exit If called interactively, will ask some questions and store the answers in $ENV{HOME}/.linuxcounter/$host EoF exit 0; } # }}} # {{{ license print license & exit # sub license { print <<EoF; Linux Counter Machine Update version $VERSION Copyright (C) 1999 Harald Tveit Alvestrand 2003 PetaMem Group (www.petamem.com) 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 below for more details. GNU GENERAL PUBLIC LICENSE Version 2, June 1991 Copyright (C) 1989, 1991 Free Software Foundation, Inc. 675 Mass Ave, Cambridge, MA 02139, USA Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. Preamble The licenses for most software are designed to take away your freedom to share and change it. By contrast, the GNU General Public License is intended to guarantee your freedom to share and change free software--to make sure the software is free for all its users. This General Public License applies to most of the Free Software Foundation's software and to any other program whose authors commit to using it. (Some other Free Software Foundation software is covered by the GNU Library General Public License instead.) You can apply it to your programs, too. When we speak of free software, we are referring to freedom, not price. Our General Public Licenses are designed to make sure that you have the freedom to distribute copies of free software (and charge for this service if you wish), that you receive source code or can get it if you want it, that you can change the software or use pieces of it in new free programs; and that you know you can do these things. To protect your rights, we need to make restrictions that forbid anyone to deny you these rights or to ask you to surrender the rights. These restrictions translate to certain responsibilities for you if you distribute copies of the software, or if you modify it. For example, if you distribute copies of such a program, whether gratis or for a fee, you must give the recipients all the rights that you have. You must make sure that they, too, receive or can get the source code. And you must show them these terms so they know their rights. We protect your rights with two steps: (1) copyright the software, and (2) offer you this license which gives you legal permission to copy, distribute and/or modify the software. Also, for each author's protection and ours, we want to make certain that everyone understands that there is no warranty for this free software. If the software is modified by someone else and passed on, we want its recipients to know that what they have is not the original, so that any problems introduced by others will not reflect on the original authors' reputations. Finally, any free program is threatened constantly by software patents. We wish to avoid the danger that redistributors of a free program will individually obtain patent licenses, in effect making the program proprietary. To prevent this, we have made it clear that any patent must be licensed for everyone's free use or not licensed at all. The precise terms and conditions for copying, distribution and modification follow. GNU GENERAL PUBLIC LICENSE TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION 0. This License applies to any program or other work which contains a notice placed by the copyright holder saying it may be distributed under the terms of this General Public License. The "Program", below, refers to any such program or work, and a "work based on the Program" means either the Program or any derivative work under copyright law: that is to say, a work containing the Program or a portion of it, either verbatim or with modifications and/or translated into another language. (Hereinafter, translation is included without limitation in the term "modification".) Each licensee is addressed as "you". Activities other than copying, distribution and modification are not covered by this License; they are outside its scope. The act of running the Program is not restricted, and the output from the Program is covered only if its contents constitute a work based on the Program (independent of having been made by running the Program). Whether that is true depends on what the Program does. 1. You may copy and distribute verbatim copies of the Program's source code as you receive it, in any medium, provided that you conspicuously and appropriately publish on each copy an appropriate copyright notice and disclaimer of warranty; keep intact all the notices that refer to this License and to the absence of any warranty; and give any other recipients of the Program a copy of this License along with the Program. You may charge a fee for the physical act of transferring a copy, and you may at your option offer warranty protection in exchange for a fee. 2. You may modify your copy or copies of the Program or any portion of it, thus forming a work based on the Program, and copy and distribute such modifications or work under the terms of Section 1 above, provided that you also meet all of these conditions: a) You must cause the modified files to carry prominent notices stating that you changed the files and the date of any change. b) You must cause any work that you distribute or publish, that in whole or in part contains or is derived from the Program or any part thereof, to be licensed as a whole at no charge to all third parties under the terms of this License. c) If the modified program normally reads commands interactively when run, you must cause it, when started running for such interactive use in the most ordinary way, to print or display an announcement including an appropriate copyright notice and a notice that there is no warranty (or else, saying that you provide a warranty) and that users may redistribute the program under these conditions, and telling the user how to view a copy of this License. (Exception: if the Program itself is interactive but does not normally print such an announcement, your work based on the Program is not required to print an announcement.) These requirements apply to the modified work as a whole. If identifiable sections of that work are not derived from the Program, and can be reasonably considered independent and separate works in themselves, then this License, and its terms, do not apply to those sections when you distribute them as separate works. But when you distribute the same sections as part of a whole which is a work based on the Program, the distribution of the whole must be on the terms of this License, whose permissions for other licensees extend to the entire whole, and thus to each and every part regardless of who wrote it. Thus, it is not the intent of this section to claim rights or contest your rights to work written entirely by you; rather, the intent is to exercise the right to control the distribution of derivative or collective works based on the Program. In addition, mere aggregation of another work not based on the Program with the Program (or with a work based on the Program) on a volume of a storage or distribution medium does not bring the other work under the scope of this License. 3. You may copy and distribute the Program (or a work based on it, under Section 2) in object code or executable form under the terms of Sections 1 and 2 above provided that you also do one of the following: a) Accompany it with the complete corresponding machine-readable source code, which must be distributed under the terms of Sections 1 and 2 above on a medium customarily used for software interchange; or, b) Accompany it with a written offer, valid for at least three years, to give any third party, for a charge no more than your cost of physically performing source distribution, a complete machine-readable copy of the corresponding source code, to be distributed under the terms of Sections 1 and 2 above on a medium customarily used for software interchange; or, c) Accompany it with the information you received as to the offer to distribute corresponding source code. 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END OF TERMS AND CONDITIONS EoF exit 0; } # }}} # Changelog for 0.2 # - indentation and folding marks # - made script work with -w and use strict # - removed some localization traps # - marked some BUGS - but they`re still there (mostly localization) # - more robust binary calls # - getval_from_file data acquisition method # - fixed df (shmfs) - but only temporarily (quick hack) # - various code optimizations & cleanup (removed unneded vars) # - Memory size detection now robst and >960MB capable # - slightly better randomness # #vim:ts=8:sw=4:sts=4