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authorPatrick Simianer <p@simianer.de>2011-10-19 14:02:34 +0200
committerPatrick Simianer <p@simianer.de>2011-10-19 14:02:34 +0200
commiteb14e36d0b29f19321d44dd7dfa73cc703838d86 (patch)
tree1285e9e56959bc3a4b506e36bbc3b49f4e938fa0 /pro-train/dist-pro.pl
parent68f158b11df9f4072699fe6a4c8022ea54102b28 (diff)
parent04e38a57b19ea012895ac2efb39382c2e77833a9 (diff)
merge upstream/master
Diffstat (limited to 'pro-train/dist-pro.pl')
-rwxr-xr-xpro-train/dist-pro.pl657
1 files changed, 657 insertions, 0 deletions
diff --git a/pro-train/dist-pro.pl b/pro-train/dist-pro.pl
new file mode 100755
index 00000000..dbfa329a
--- /dev/null
+++ b/pro-train/dist-pro.pl
@@ -0,0 +1,657 @@
+#!/usr/bin/env perl
+use strict;
+my @ORIG_ARGV=@ARGV;
+use Cwd qw(getcwd);
+my $SCRIPT_DIR; BEGIN { use Cwd qw/ abs_path /; use File::Basename; $SCRIPT_DIR = dirname(abs_path($0)); push @INC, $SCRIPT_DIR, "$SCRIPT_DIR/../environment"; }
+
+# Skip local config (used for distributing jobs) if we're running in local-only mode
+use LocalConfig;
+use Getopt::Long;
+use IPC::Open2;
+use POSIX ":sys_wait_h";
+my $QSUB_CMD = qsub_args(mert_memory());
+
+my $VEST_DIR="$SCRIPT_DIR/../vest";
+require "$VEST_DIR/libcall.pl";
+
+# Default settings
+my $srcFile;
+my $refFiles;
+my $bin_dir = $SCRIPT_DIR;
+die "Bin directory $bin_dir missing/inaccessible" unless -d $bin_dir;
+my $FAST_SCORE="$bin_dir/../mteval/fast_score";
+die "Can't execute $FAST_SCORE" unless -x $FAST_SCORE;
+my $MAPINPUT = "$bin_dir/mr_pro_generate_mapper_input.pl";
+my $MAPPER = "$bin_dir/mr_pro_map";
+my $REDUCER = "$bin_dir/mr_pro_reduce";
+my $parallelize = "$VEST_DIR/parallelize.pl";
+my $libcall = "$VEST_DIR/libcall.pl";
+my $sentserver = "$VEST_DIR/sentserver";
+my $sentclient = "$VEST_DIR/sentclient";
+my $LocalConfig = "$SCRIPT_DIR/../environment/LocalConfig.pm";
+
+my $SCORER = $FAST_SCORE;
+die "Can't find $MAPPER" unless -x $MAPPER;
+my $cdec = "$bin_dir/../decoder/cdec";
+die "Can't find decoder in $cdec" unless -x $cdec;
+die "Can't find $parallelize" unless -x $parallelize;
+die "Can't find $libcall" unless -e $libcall;
+my $decoder = $cdec;
+my $lines_per_mapper = 30;
+my $iteration = 1;
+my $run_local = 0;
+my $best_weights;
+my $max_iterations = 30;
+my $decode_nodes = 15; # number of decode nodes
+my $pmem = "4g";
+my $disable_clean = 0;
+my %seen_weights;
+my $help = 0;
+my $epsilon = 0.0001;
+my $dryrun = 0;
+my $last_score = -10000000;
+my $metric = "ibm_bleu";
+my $dir;
+my $iniFile;
+my $weights;
+my $use_make; # use make to parallelize
+my $usefork;
+my $initial_weights;
+my $pass_suffix = '';
+my $cpbin=1;
+
+# regularization strength
+my $tune_regularizer = 0;
+my $reg = 1e-2;
+
+# Process command-line options
+Getopt::Long::Configure("no_auto_abbrev");
+if (GetOptions(
+ "decode-nodes=i" => \$decode_nodes,
+ "dont-clean" => \$disable_clean,
+ "pass-suffix=s" => \$pass_suffix,
+ "use-fork" => \$usefork,
+ "dry-run" => \$dryrun,
+ "epsilon=s" => \$epsilon,
+ "help" => \$help,
+ "weights=s" => \$initial_weights,
+ "tune-regularizer" => \$tune_regularizer,
+ "reg=f" => \$reg,
+ "local" => \$run_local,
+ "use-make=i" => \$use_make,
+ "max-iterations=i" => \$max_iterations,
+ "pmem=s" => \$pmem,
+ "cpbin!" => \$cpbin,
+ "ref-files=s" => \$refFiles,
+ "metric=s" => \$metric,
+ "source-file=s" => \$srcFile,
+ "workdir=s" => \$dir,
+) == 0 || @ARGV!=1 || $help) {
+ print_help();
+ exit;
+}
+
+if ($usefork) { $usefork = "--use-fork"; } else { $usefork = ''; }
+
+if ($metric =~ /^(combi|ter)$/i) {
+ $lines_per_mapper = 5;
+}
+
+($iniFile) = @ARGV;
+
+
+sub write_config;
+sub enseg;
+sub print_help;
+
+my $nodelist;
+my $host =check_output("hostname"); chomp $host;
+my $bleu;
+my $interval_count = 0;
+my $logfile;
+my $projected_score;
+
+# used in sorting scores
+my $DIR_FLAG = '-r';
+if ($metric =~ /^ter$|^aer$/i) {
+ $DIR_FLAG = '';
+}
+
+my $refs_comma_sep = get_comma_sep_refs('r',$refFiles);
+
+unless ($dir){
+ $dir = "protrain";
+}
+unless ($dir =~ /^\//){ # convert relative path to absolute path
+ my $basedir = check_output("pwd");
+ chomp $basedir;
+ $dir = "$basedir/$dir";
+}
+
+
+# Initializations and helper functions
+srand;
+
+my @childpids = ();
+my @cleanupcmds = ();
+
+sub cleanup {
+ print STDERR "Cleanup...\n";
+ for my $pid (@childpids){ unchecked_call("kill $pid"); }
+ for my $cmd (@cleanupcmds){ unchecked_call("$cmd"); }
+ exit 1;
+};
+# Always call cleanup, no matter how we exit
+*CORE::GLOBAL::exit =
+ sub{ cleanup(); };
+$SIG{INT} = "cleanup";
+$SIG{TERM} = "cleanup";
+$SIG{HUP} = "cleanup";
+
+my $decoderBase = check_output("basename $decoder"); chomp $decoderBase;
+my $newIniFile = "$dir/$decoderBase.ini";
+my $inputFileName = "$dir/input";
+my $user = $ENV{"USER"};
+
+
+# process ini file
+-e $iniFile || die "Error: could not open $iniFile for reading\n";
+open(INI, $iniFile);
+
+use File::Basename qw(basename);
+#pass bindir, refs to vars holding bin
+sub modbin {
+ local $_;
+ my $bindir=shift;
+ check_call("mkdir -p $bindir");
+ -d $bindir || die "couldn't make bindir $bindir";
+ for (@_) {
+ my $src=$$_;
+ $$_="$bindir/".basename($src);
+ check_call("cp -p $src $$_");
+ }
+}
+sub dirsize {
+ opendir ISEMPTY,$_[0];
+ return scalar(readdir(ISEMPTY))-1;
+}
+my @allweights;
+if ($dryrun){
+ write_config(*STDERR);
+ exit 0;
+} else {
+ if (-e $dir && dirsize($dir)>1 && -e "$dir/hgs" ){ # allow preexisting logfile, binaries, but not dist-pro.pl outputs
+ die "ERROR: working dir $dir already exists\n\n";
+ } else {
+ -e $dir || mkdir $dir;
+ mkdir "$dir/hgs";
+ modbin("$dir/bin",\$LocalConfig,\$cdec,\$SCORER,\$MAPINPUT,\$MAPPER,\$REDUCER,\$parallelize,\$sentserver,\$sentclient,\$libcall) if $cpbin;
+ mkdir "$dir/scripts";
+ my $cmdfile="$dir/rerun-pro.sh";
+ open CMD,'>',$cmdfile;
+ print CMD "cd ",&getcwd,"\n";
+# print CMD &escaped_cmdline,"\n"; #buggy - last arg is quoted.
+ my $cline=&cmdline."\n";
+ print CMD $cline;
+ close CMD;
+ print STDERR $cline;
+ chmod(0755,$cmdfile);
+ check_call("cp $initial_weights $dir/weights.0");
+ die "Can't find weights.0" unless (-e "$dir/weights.0");
+ }
+ write_config(*STDERR);
+}
+
+
+# Generate initial files and values
+check_call("cp $iniFile $newIniFile");
+$iniFile = $newIniFile;
+
+my $newsrc = "$dir/dev.input";
+enseg($srcFile, $newsrc);
+$srcFile = $newsrc;
+my $devSize = 0;
+open F, "<$srcFile" or die "Can't read $srcFile: $!";
+while(<F>) { $devSize++; }
+close F;
+
+unless($best_weights){ $best_weights = $weights; }
+unless($projected_score){ $projected_score = 0.0; }
+$seen_weights{$weights} = 1;
+
+my $random_seed = int(time / 1000);
+my $lastWeightsFile;
+my $lastPScore = 0;
+# main optimization loop
+while (1){
+ print STDERR "\n\nITERATION $iteration\n==========\n";
+
+ if ($iteration > $max_iterations){
+ print STDERR "\nREACHED STOPPING CRITERION: Maximum iterations\n";
+ last;
+ }
+ # iteration-specific files
+ my $runFile="$dir/run.raw.$iteration";
+ my $onebestFile="$dir/1best.$iteration";
+ my $logdir="$dir/logs.$iteration";
+ my $decoderLog="$logdir/decoder.sentserver.log.$iteration";
+ my $scorerLog="$logdir/scorer.log.$iteration";
+ check_call("mkdir -p $logdir");
+
+
+ #decode
+ print STDERR "RUNNING DECODER AT ";
+ print STDERR unchecked_output("date");
+ my $im1 = $iteration - 1;
+ my $weightsFile="$dir/weights.$im1";
+ push @allweights, "-w $dir/weights.$im1";
+ `rm -f $dir/hgs/*.gz`;
+ my $decoder_cmd = "$decoder -c $iniFile --weights$pass_suffix $weightsFile -O $dir/hgs";
+ my $pcmd;
+ if ($run_local) {
+ $pcmd = "cat $srcFile |";
+ } elsif ($use_make) {
+ # TODO: Throw error when decode_nodes is specified along with use_make
+ $pcmd = "cat $srcFile | $parallelize --use-fork -p $pmem -e $logdir -j $use_make --";
+ } else {
+ $pcmd = "cat $srcFile | $parallelize $usefork -p $pmem -e $logdir -j $decode_nodes --";
+ }
+ my $cmd = "$pcmd $decoder_cmd 2> $decoderLog 1> $runFile";
+ print STDERR "COMMAND:\n$cmd\n";
+ check_bash_call($cmd);
+ my $num_hgs;
+ my $num_topbest;
+ my $retries = 0;
+ while($retries < 5) {
+ $num_hgs = check_output("ls $dir/hgs/*.gz | wc -l");
+ $num_topbest = check_output("wc -l < $runFile");
+ print STDERR "NUMBER OF HGs: $num_hgs\n";
+ print STDERR "NUMBER OF TOP-BEST HYPs: $num_topbest\n";
+ if($devSize == $num_hgs && $devSize == $num_topbest) {
+ last;
+ } else {
+ print STDERR "Incorrect number of hypergraphs or topbest. Waiting for distributed filesystem and retrying...\n";
+ sleep(3);
+ }
+ $retries++;
+ }
+ die "Dev set contains $devSize sentences, but we don't have topbest and hypergraphs for all these! Decoder failure? Check $decoderLog\n" if ($devSize != $num_hgs || $devSize != $num_topbest);
+ my $dec_score = check_output("cat $runFile | $SCORER $refs_comma_sep -l $metric");
+ chomp $dec_score;
+ print STDERR "DECODER SCORE: $dec_score\n";
+
+ # save space
+ check_call("gzip -f $runFile");
+ check_call("gzip -f $decoderLog");
+
+ # run optimizer
+ print STDERR "RUNNING OPTIMIZER AT ";
+ print STDERR unchecked_output("date");
+ print STDERR " - GENERATE TRAINING EXEMPLARS\n";
+ my $mergeLog="$logdir/prune-merge.log.$iteration";
+
+ my $score = 0;
+ my $icc = 0;
+ my $inweights="$dir/weights.$im1";
+ $cmd="$MAPINPUT $dir/hgs > $dir/agenda.$im1";
+ print STDERR "COMMAND:\n$cmd\n";
+ check_call($cmd);
+ check_call("mkdir -p $dir/splag.$im1");
+ $cmd="split -a 3 -l $lines_per_mapper $dir/agenda.$im1 $dir/splag.$im1/mapinput.";
+ print STDERR "COMMAND:\n$cmd\n";
+ check_call($cmd);
+ opendir(DIR, "$dir/splag.$im1") or die "Can't open directory: $!";
+ my @shards = grep { /^mapinput\./ } readdir(DIR);
+ closedir DIR;
+ die "No shards!" unless scalar @shards > 0;
+ my $joblist = "";
+ my $nmappers = 0;
+ @cleanupcmds = ();
+ my %o2i = ();
+ my $first_shard = 1;
+ my $mkfile; # only used with makefiles
+ my $mkfilename;
+ if ($use_make) {
+ $mkfilename = "$dir/splag.$im1/domap.mk";
+ open $mkfile, ">$mkfilename" or die "Couldn't write $mkfilename: $!";
+ print $mkfile "all: $dir/splag.$im1/map.done\n\n";
+ }
+ my @mkouts = (); # only used with makefiles
+ my @mapoutputs = ();
+ for my $shard (@shards) {
+ my $mapoutput = $shard;
+ my $client_name = $shard;
+ $client_name =~ s/mapinput.//;
+ $client_name = "pro.$client_name";
+ $mapoutput =~ s/mapinput/mapoutput/;
+ push @mapoutputs, "$dir/splag.$im1/$mapoutput";
+ $o2i{"$dir/splag.$im1/$mapoutput"} = "$dir/splag.$im1/$shard";
+ my $script = "$MAPPER -s $srcFile -l $metric $refs_comma_sep -w $inweights -K $dir/kbest < $dir/splag.$im1/$shard > $dir/splag.$im1/$mapoutput";
+ if ($run_local) {
+ print STDERR "COMMAND:\n$script\n";
+ check_bash_call($script);
+ } elsif ($use_make) {
+ my $script_file = "$dir/scripts/map.$shard";
+ open F, ">$script_file" or die "Can't write $script_file: $!";
+ print F "#!/bin/bash\n";
+ print F "$script\n";
+ close F;
+ my $output = "$dir/splag.$im1/$mapoutput";
+ push @mkouts, $output;
+ chmod(0755, $script_file) or die "Can't chmod $script_file: $!";
+ if ($first_shard) { print STDERR "$script\n"; $first_shard=0; }
+ print $mkfile "$output: $dir/splag.$im1/$shard\n\t$script_file\n\n";
+ } else {
+ my $script_file = "$dir/scripts/map.$shard";
+ open F, ">$script_file" or die "Can't write $script_file: $!";
+ print F "$script\n";
+ close F;
+ if ($first_shard) { print STDERR "$script\n"; $first_shard=0; }
+
+ $nmappers++;
+ my $qcmd = "$QSUB_CMD -N $client_name -o /dev/null -e $logdir/$client_name.ER $script_file";
+ my $jobid = check_output("$qcmd");
+ chomp $jobid;
+ $jobid =~ s/^(\d+)(.*?)$/\1/g;
+ $jobid =~ s/^Your job (\d+) .*$/\1/;
+ push(@cleanupcmds, "qdel $jobid 2> /dev/null");
+ print STDERR " $jobid";
+ if ($joblist == "") { $joblist = $jobid; }
+ else {$joblist = $joblist . "\|" . $jobid; }
+ }
+ }
+ my @dev_outs = ();
+ my @devtest_outs = ();
+ if ($tune_regularizer) {
+ for (my $i = 0; $i < scalar @mapoutputs; $i++) {
+ if ($i % 3 == 1) {
+ push @devtest_outs, $mapoutputs[$i];
+ } else {
+ push @dev_outs, $mapoutputs[$i];
+ }
+ }
+ if (scalar @devtest_outs == 0) {
+ die "Not enough training instances for regularization tuning! Rerun without --tune-regularizer\n";
+ }
+ } else {
+ @dev_outs = @mapoutputs;
+ }
+ if ($run_local) {
+ print STDERR "\nCompleted extraction of training exemplars.\n";
+ } elsif ($use_make) {
+ print $mkfile "$dir/splag.$im1/map.done: @mkouts\n\ttouch $dir/splag.$im1/map.done\n\n";
+ close $mkfile;
+ my $mcmd = "make -j $use_make -f $mkfilename";
+ print STDERR "\nExecuting: $mcmd\n";
+ check_call($mcmd);
+ } else {
+ print STDERR "\nLaunched $nmappers mappers.\n";
+ sleep 8;
+ print STDERR "Waiting for mappers to complete...\n";
+ while ($nmappers > 0) {
+ sleep 5;
+ my @livejobs = grep(/$joblist/, split(/\n/, unchecked_output("qstat | grep -v ' C '")));
+ $nmappers = scalar @livejobs;
+ }
+ print STDERR "All mappers complete.\n";
+ }
+ my $tol = 0;
+ my $til = 0;
+ my $dev_test_file = "$dir/splag.$im1/devtest.gz";
+ if ($tune_regularizer) {
+ my $cmd = "cat @devtest_outs | gzip > $dev_test_file";
+ check_bash_call($cmd);
+ die "Can't find file $dev_test_file" unless -f $dev_test_file;
+ }
+ #print STDERR "MO: @mapoutputs\n";
+ for my $mo (@mapoutputs) {
+ #my $olines = get_lines($mo);
+ #my $ilines = get_lines($o2i{$mo});
+ #die "$mo: no training instances generated!" if $olines == 0;
+ }
+ print STDERR "\nRUNNING CLASSIFIER (REDUCER)\n";
+ print STDERR unchecked_output("date");
+ $cmd="cat @dev_outs | $REDUCER -w $dir/weights.$im1 -s $reg";
+ if ($tune_regularizer) {
+ $cmd .= " -T -t $dev_test_file";
+ }
+ $cmd .= " > $dir/weights.$iteration";
+ print STDERR "COMMAND:\n$cmd\n";
+ check_bash_call($cmd);
+ $lastWeightsFile = "$dir/weights.$iteration";
+ if ($tune_regularizer) {
+ open W, "<$lastWeightsFile" or die "Can't read $lastWeightsFile: $!";
+ my $line = <W>;
+ close W;
+ my ($sharp, $label, $nreg) = split /\s|=/, $line;
+ print STDERR "REGULARIZATION STRENGTH ($label) IS $nreg\n";
+ $reg = $nreg;
+ # only tune regularizer on first iteration?
+ $tune_regularizer = 0;
+ }
+ $lastPScore = $score;
+ $iteration++;
+ print STDERR "\n==========\n";
+}
+
+print STDERR "\nFINAL WEIGHTS: $lastWeightsFile\n(Use -w <this file> with the decoder)\n\n";
+
+print STDOUT "$lastWeightsFile\n";
+
+exit 0;
+
+sub get_lines {
+ my $fn = shift @_;
+ open FL, "<$fn" or die "Couldn't read $fn: $!";
+ my $lc = 0;
+ while(<FL>) { $lc++; }
+ return $lc;
+}
+
+sub get_comma_sep_refs {
+ my ($r,$p) = @_;
+ my $o = check_output("echo $p");
+ chomp $o;
+ my @files = split /\s+/, $o;
+ return "-$r " . join(" -$r ", @files);
+}
+
+sub read_weights_file {
+ my ($file) = @_;
+ open F, "<$file" or die "Couldn't read $file: $!";
+ my @r = ();
+ my $pm = -1;
+ while(<F>) {
+ next if /^#/;
+ next if /^\s*$/;
+ chomp;
+ if (/^(.+)\s+(.+)$/) {
+ my $m = $1;
+ my $w = $2;
+ die "Weights out of order: $m <= $pm" unless $m > $pm;
+ push @r, $w;
+ } else {
+ warn "Unexpected feature name in weight file: $_";
+ }
+ }
+ close F;
+ return join ' ', @r;
+}
+
+# subs
+sub write_config {
+ my $fh = shift;
+ my $cleanup = "yes";
+ if ($disable_clean) {$cleanup = "no";}
+
+ print $fh "\n";
+ print $fh "DECODER: $decoder\n";
+ print $fh "INI FILE: $iniFile\n";
+ print $fh "WORKING DIR: $dir\n";
+ print $fh "SOURCE (DEV): $srcFile\n";
+ print $fh "REFS (DEV): $refFiles\n";
+ print $fh "EVAL METRIC: $metric\n";
+ print $fh "MAX ITERATIONS: $max_iterations\n";
+ print $fh "DECODE NODES: $decode_nodes\n";
+ print $fh "HEAD NODE: $host\n";
+ print $fh "PMEM (DECODING): $pmem\n";
+ print $fh "CLEANUP: $cleanup\n";
+}
+
+sub update_weights_file {
+ my ($neww, $rfn, $rpts) = @_;
+ my @feats = @$rfn;
+ my @pts = @$rpts;
+ my $num_feats = scalar @feats;
+ my $num_pts = scalar @pts;
+ die "$num_feats (num_feats) != $num_pts (num_pts)" unless $num_feats == $num_pts;
+ open G, ">$neww" or die;
+ for (my $i = 0; $i < $num_feats; $i++) {
+ my $f = $feats[$i];
+ my $lambda = $pts[$i];
+ print G "$f $lambda\n";
+ }
+ close G;
+}
+
+sub enseg {
+ my $src = shift;
+ my $newsrc = shift;
+ open(SRC, $src);
+ open(NEWSRC, ">$newsrc");
+ my $i=0;
+ while (my $line=<SRC>){
+ chomp $line;
+ if ($line =~ /^\s*<seg/i) {
+ if($line =~ /id="[0-9]+"/) {
+ print NEWSRC "$line\n";
+ } else {
+ die "When using segments with pre-generated <seg> tags, you must include a zero-based id attribute";
+ }
+ } else {
+ print NEWSRC "<seg id=\"$i\">$line</seg>\n";
+ }
+ $i++;
+ }
+ close SRC;
+ close NEWSRC;
+ die "Empty dev set!" if ($i == 0);
+}
+
+sub print_help {
+
+ my $executable = check_output("basename $0"); chomp $executable;
+ print << "Help";
+
+Usage: $executable [options] <ini file>
+
+ $executable [options] <ini file>
+ Runs a complete MERT optimization and test set decoding, using
+ the decoder configuration in ini file. Note that many of the
+ options have default values that are inferred automatically
+ based on certain conventions. For details, refer to descriptions
+ of the options --decoder, --weights, and --workdir.
+
+Required:
+
+ --ref-files <files>
+ Dev set ref files. This option takes only a single string argument.
+ To use multiple files (including file globbing), this argument should
+ be quoted.
+
+ --source-file <file>
+ Dev set source file.
+
+ --weights <file>
+ Initial weights file (use empty file to start from 0)
+
+General options:
+
+ --local
+ Run the decoder and optimizer locally with a single thread.
+
+ --decode-nodes <I>
+ Number of decoder processes to run in parallel. [default=15]
+
+ --help
+ Print this message and exit.
+
+ --max-iterations <M>
+ Maximum number of iterations to run. If not specified, defaults
+ to 10.
+
+ --metric <method>
+ Metric to optimize.
+ Example values: IBM_BLEU, NIST_BLEU, Koehn_BLEU, TER, Combi
+
+ --pass-suffix <S>
+ If the decoder is doing multi-pass decoding, the pass suffix "2",
+ "3", etc., is used to control what iteration of weights is set.
+
+ --pmem <N>
+ Amount of physical memory requested for parallel decoding jobs.
+
+ --use-make <I>
+ Use make -j <I> to run the optimizer commands (useful on large
+ shared-memory machines where qsub is unavailable).
+
+ --workdir <dir>
+ Directory for intermediate and output files. If not specified, the
+ name is derived from the ini filename. Assuming that the ini
+ filename begins with the decoder name and ends with ini, the default
+ name of the working directory is inferred from the middle part of
+ the filename. E.g. an ini file named decoder.foo.ini would have
+ a default working directory name foo.
+
+Regularization options:
+
+ --tune-regularizer
+ Hold out one third of the tuning data and used this to tune the
+ regularization parameter.
+
+ --reg <F>
+
+Help
+}
+
+sub convert {
+ my ($str) = @_;
+ my @ps = split /;/, $str;
+ my %dict = ();
+ for my $p (@ps) {
+ my ($k, $v) = split /=/, $p;
+ $dict{$k} = $v;
+ }
+ return %dict;
+}
+
+
+sub cmdline {
+ return join ' ',($0,@ORIG_ARGV);
+}
+
+#buggy: last arg gets quoted sometimes?
+my $is_shell_special=qr{[ \t\n\\><|&;"'`~*?{}$!()]};
+my $shell_escape_in_quote=qr{[\\"\$`!]};
+
+sub escape_shell {
+ my ($arg)=@_;
+ return undef unless defined $arg;
+ if ($arg =~ /$is_shell_special/) {
+ $arg =~ s/($shell_escape_in_quote)/\\$1/g;
+ return "\"$arg\"";
+ }
+ return $arg;
+}
+
+sub escaped_shell_args {
+ return map {local $_=$_;chomp;escape_shell($_)} @_;
+}
+
+sub escaped_shell_args_str {
+ return join ' ',&escaped_shell_args(@_);
+}
+
+sub escaped_cmdline {
+ return "$0 ".&escaped_shell_args_str(@ORIG_ARGV);
+}