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#!/usr/bin/perl -w
#
# Regina - A Normal Surface Theory Calculator
# Manage a triangulation census distributed amongst several machines
#
# Copyright (c) 2002-2008, Ben Burton
# For further details contact Ben Burton (bab@debian.org).
#
# Usage: tricensus-manager [ <tricensus-options> ] <pairs-file-prefix>
#
# See the manpage or users' handbook for full usage instructions.
#
# 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., 51 Franklin St, Fifth Floor, Boston,
# MA 02110-1301, USA.
#
use Fcntl ':flock';
use strict;
sub usage {
print STDERR "Usage: $0 [ <tricensus-options> ] <pairs-file-prefix>\n";
exit(1);
}
# --- Parse the command-line options. ---
if (! @ARGV) {
usage;
}
my $prefix = pop @ARGV;
if ($prefix =~ /^-/) {
print STDERR "Invalid pairs file prefix: $prefix\n";
usage;
}
my @tricensusArgs = ();
foreach my $arg (@ARGV) {
if ((($arg !~ /^-/) and ($arg !~ /^\d+$/)) or ($arg =~ /\'/)) {
print STDERR "Invalid tricensus argument: $arg\n";
usage;
}
# Check for --genpairs.
if (($arg =~ /^--genpairs$/i) or ($arg =~ /^-([^-].*)?p/)) {
print STDERR "Face pairings should already have been generated.\n";
print STDERR "Tricensus argument --genpairs should not be used " .
"with this utility.\n";
usage;
}
# Silently strip out --usepairs.
next if (($arg =~ /^--usepairs$/i) or ($arg =~ /^-P+$/));
if ($arg =~ /^-[^-]/) {
$arg =~ s/P//g;
}
push @tricensusArgs, $arg;
}
# --- Find the full list of pairs files to work on. ---
if (($prefix =~ /\*/) or ($prefix =~ /\?/)) {
print STDERR "The pairs file prefix [$prefix] " .
"should not contain wildcards.\n";
usage;
}
my @pairsFiles = <$prefix*.pairs>;
if (! @pairsFiles) {
print STDERR "No pairs files could be found beginning with $prefix.\n";
usage;
}
# --- Establish which real tricensus to run. ---
chomp (my $tricensusDir = `dirname "$0"`);
my $tricensus = $tricensusDir . '/tricensus';
if (! -e $tricensus) {
print STDERR "Cannot find tricensus utility [$tricensus].\n";
exit(1);
}
# --- Work through the files one by one. ---
my $base;
my $time;
my $progress;
my $output;
my $command;
my @commandArgs;
my $errMsg;
my @startTimes;
my @endTimes;
my $userTime;
my $sysTime;
# Switch on autoflush for stdout.
$| = 1;
# Establish our machine name.
my $hostname;
$hostname = `hostname` or $hostname = 'unknown';
chomp $hostname;
my $retVal = 0;
foreach my $pairs (@pairsFiles) {
print "Trying $pairs ... ";
$base = $pairs;
$base =~ s/\.pairs$//;
$time = $base . '.time';
$progress = $base . '.progress';
$output = $base . '.rga';
if (-e $time) {
print "skipped.\n";
next;
}
if (! (open(TAKEN, '>>', $time) and flock(TAKEN, LOCK_EX | LOCK_NB))) {
close TAKEN;
print "skipped.\n";
next;
}
# Take this pairs file!
print 'taken and processing ... ';
# Make a note of who's taken the process.
print TAKEN "Taken by " . $hostname . ", PID " . $$ . ".\n";
# Prepare the command-line.
@commandArgs = @tricensusArgs;
push @commandArgs, $output;
$command = "'$tricensus' -P '" . join("' '", @commandArgs) .
"' < '$pairs' > '$progress'";
# Execute this piece of the census!
$errMsg = '';
print TAKEN "Started at " . localtime() . ".\n";
@startTimes = times;
if (system($command) != 0) {
$errMsg = "ERROR: Command failed: $command\n";
} else {
@endTimes = times;
$userTime = $endTimes[2] - $startTimes[2];
$sysTime = $endTimes[3] - $endTimes[3];
print TAKEN "Completed at " . localtime() . ".\n";
print TAKEN "User time (s): $userTime\n";
print TAKEN "System time (s): $sysTime\n";
}
# Did we have troubles with the child process?
if ($errMsg) {
print "error.\n";
print STDERR $errMsg;
print TAKEN $errMsg;
$retVal = 1;
}
# Tidy up.
print "done.\n" unless $errMsg;
flock(TAKEN, LOCK_UN);
close TAKEN;
}
# --- Return whether or not we encountered any problems. ---
exit($retVal);
|
