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| Current File : //usr/src/contrib/ntp/scripts/monitoring/ntploopwatch |
#!/usr/bin/perl -w
;# --*-perl-*--
;#
;# /src/NTP/ntp4-dev/scripts/monitoring/ntploopwatch,v 4.7 2004/11/14 16:11:05 kardel RELEASE_20050508_A
;#
;# process loop filter statistics file and either
;# - show statistics periodically using gnuplot
;# - or print a single plot
;#
;# Copyright (c) 1992-1998
;# Rainer Pruy, Friedrich-Alexander Universität Erlangen-Nürnberg
;#
;#
;#############################################################
$0 =~ s!^.*/([^/]+)$!$1!;
$F = ' ' x length($0);
$|=1;
$ENV{'SHELL'} = '/bin/sh'; # use bourne shell
undef($config);
undef($workdir);
undef($PrintIt);
undef($samples);
undef($StartTime);
undef($EndTime);
($a,$b) if 0; # keep -w happy
$usage = <<"E-O-P";
usage:
to watch statistics permanently:
$0 [-v[<level>]] [-c <config-file>] [-d <working-dir>]
$F [-h <hostname>]
to get a single print out specify also
$F -P[<printer>] [-s<samples>]
$F [-S <start-time>] [-E <end-time>]
$F [-Y <MaxOffs>] [-y <MinOffs>]
If You like long option names, You can use:
-help
-c +config
-d +directory
-h +host
-v +verbose[=<level>]
-P +printer[=<printer>]
-s +samples[=<samples>]
-S +starttime
-E +endtime
-Y +maxy
-y +miny
If <printer> contains a '/' (slash character) output is directed to
a file of this name instead of delivered to a printer.
E-O-P
;# add directory to look for lr.pl and timelocal.pl (in front of current list)
unshift(@INC,".");
require "lr.pl"; # linear regresion routines
$MJD_1970 = 40587; # from ntp.h (V3)
$RecordSize = 48; # usually a line fits into 42 bytes
$MinClip = 1; # clip Y scales with greater range than this
;# largest extension of Y scale from mean value, factor for standart deviation
$FuzzLow = 2.2; # for side closer to zero
$FuzzBig = 1.8; # for side farther from zero
require "ctime.pl";
require "timelocal.pl";
;# early distributions of ctime.pl had a bug
$ENV{'TZ'} = 'MET' unless defined $ENV{'TZ'} || $[ > 4.010;
if (defined(@ctime'MoY))
{
*Month=*ctime'MoY;
*Day=*ctime'DoW;
} # ' re-sync emacs fontification
else
{
@Month = ('Jan','Feb','Mar','Apr','May','Jun','Jul','Aug','Sep','Oct','Nov','Dec');
@Day = ('Sun','Mon','Tue','Wed','Thu','Fri','Sat');
}
print @ctime'DoW if 0; # ' re-sync emacs fontification
;# max number of days per month
@MaxNumDaysPerMonth = (31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
;# config settable parameters
$delay = 60;
$srcprefix = "./var\@\$STATHOST/loopstats.";
$showoffs = 1;
$showfreq = 1;
$showcmpl = 0;
$showoreg = 0;
$showfreg = 0;
undef($timebase);
undef($freqbase);
undef($cmplscale);
undef($MaxY);
undef($MinY);
$deltaT = 512; # indicate sample data gaps greater than $deltaT seconds
$verbose = 1;
while($_ = shift(@ARGV))
{
(/^[+-]help$/) && die($usage);
(/^-c$/ || /^\+config$/) &&
(@ARGV || die($usage), $config = shift(@ARGV), next);
(/^-d$/ || /^\+directory$/) &&
(@ARGV || die($usage), $workdir = shift(@ARGV), next);
(/^-h$/ || /^\+host$/) &&
(@ARGV || die($usage), $STATHOST = shift, next);
(/^-v(\d*)$/ || /^\+verbose=?(\d*)$/) &&
($verbose=($1 eq "") ? 1 : $1, next);
(/^-P(\S*)$/ || /^\+[Pp]rinter=?(\S*)$/) &&
($PrintIt = $1, $verbose==1 && ($verbose = 0), next);
(/^-s(\d*)$/ || /^\+samples=?(\d*)$/) &&
(($samples = ($1 eq "") ? (shift || die($usage)): $1), next);
(/^-S$/ || /^\+[Ss]tart[Tt]ime$/) &&
(@ARGV || die($usage), $StartTime=&date_time_spec2seconds(shift),next);
(/^-E$/ || /^\+[Ee]nd[Tt]ime$/) &&
(@ARGV || die($usage), $EndTime = &date_time_spec2seconds(shift),next);
(/^-Y$/ || /^\+[Mm]ax[Yy]$/) &&
(@ARGV || die($usage), $MaxY = shift, next);
(/^-y$/ || /^\+[Mm]in[Yy]$/) &&
(@ARGV || die($usage), $MinY = shift, next);
die("$0: unexpected argument \"$_\"\n$usage");
}
if (defined($workdir))
{
chdir($workdir) ||
die("$0: failed to change working dir to \"$workdir\": $!\n");
}
$PrintIt = "ps" if defined($PrintIt) && $PrintIt eq "";
if (!defined($PrintIt))
{
defined($samples) &&
print "WARNING: your samples value may be shadowed by config file settings\n";
defined($StartTime) &&
print "WARNING: your StartTime value may be shadowed by config file settings\n";
defined($EndTime) &&
print "WARNING: your EndTime value may be shadowed by config file settings\n";
defined($MaxY) &&
print "WARNING: your MaxY value may be shadowed by config file settings\n";
defined($MinY) &&
print "WARNING: your MinY value may be shadowed by config file settings\n";
;# check operating environment
;#
;# gnuplot usually has X support
;# I vaguely remember there was one with sunview support
;#
;# If Your plotcmd can display graphics using some other method
;# (Tek window,..) fix the following test
;# (or may be, just disable it)
;#
!(defined($ENV{'DISPLAY'}) || defined($ENV{'WINDOW_PARENT'})) &&
die("Need window system to monitor statistics\n");
}
;# configuration file
$config = "loopwatch.config" unless defined($config);
($STATHOST = $config) =~ s!.*loopwatch\.config.([^/\.]*)$!$1!
unless defined($STATHOST);
($STATTAG = $STATHOST) =~ s/^([^\.\*\s]+)\..*$/$1/;
$srcprefix =~ s/\$STATHOST/$STATHOST/g;
;# plot command
@plotcmd=("gnuplot",
'-title', "Ntp loop filter statistics $STATHOST",
'-name', "NtpLoopWatch_$STATTAG");
$tmpfile = "/tmp/ntpstat.$$";
;# other variables
$doplot = ""; # assembled command for @plotcmd to display plot
undef($laststat);
;# plot value ranges
undef($mintime);
undef($maxtime);
undef($minoffs);
undef($maxoffs);
undef($minfreq);
undef($maxfreq);
undef($mincmpl);
undef($maxcmpl);
undef($miny);
undef($maxy);
;# stop operation if plot command dies
sub sigchld
{
local($pid) = wait;
unlink($tmpfile);
warn(sprintf("%s: %s died: exit status: %d signal %d\n",
$0,
(defined($Plotpid) && $Plotpid == $pid)
? "plotcmd" : "unknown child $pid",
$?>>8,$? & 0xff)) if $?;
exit(1) if $? && defined($Plotpid) && $pid == $Plotpid;
}
&sigchld if 0;
$SIG{'CHLD'} = "sigchld";
$SIG{'CLD'} = "sigchld";
sub abort
{
unlink($tmpfile);
defined($Plotpid) && kill('TERM',$Plotpid);
die("$0: received signal SIG$_[$[] - exiting\n");
}
&abort if 0; # make -w happy - &abort IS used
$SIG{'INT'} = $SIG{'HUP'} = $SIG{'QUIT'} = $SIG{'TERM'} = $SIG{'PIPE'} = "abort";
;#
sub abs
{
($_[$[] < 0) ? -($_[$[]) : $_[$[];
}
sub boolval
{
local($v) = ($_[$[]);
return 1 if ($v eq 'yes') || ($v eq 'y');
return 1 if ($v =~ /^[0-9]*$/) && ($v != 0);
return 0;
}
;#####################
;# start of real work
print "starting plot command (" . join(" ",@plotcmd) . ")\n" if $verbose > 1;
$Plotpid = open(PLOT,"|-");
select((select(PLOT),$|=1)[$[]); # make PLOT line bufferd
defined($Plotpid) ||
die("$0: failed to start plot command: $!\n");
unless ($Plotpid)
{
;# child == plot command
close(STDOUT);
open(STDOUT,">&STDERR") ||
die("$0: failed to redirect STDOUT of plot command: $!\n");
print STDOUT "plot command running as $$\n";
exec @plotcmd;
die("$0: failed to exec (@plotcmd): $!\n");
exit(1); # in case ...
}
sub read_config
{
local($at) = (stat($config))[$[+9];
local($_,$c,$v);
(undef($laststat),(print("stat $config failed: $!\n")),return) if ! defined($at);
return if (defined($laststat) && ($laststat == $at));
$laststat = $at;
print "reading configuration from \"$config\"\n" if $verbose;
open(CF,"<$config") ||
(warn("$0: failed to read \"$config\" - using old settings ($!)\n"),
return);
while(<CF>)
{
chop;
s/^([^\#]*[^\#\s]?)\s*\#.*$//;
next if /^\s*$/;
s/^\s*([^=\s]*)\s*=\s*(.*\S)\s*$/$1=$2/;
($c,$v) = split(/=/,$_,2);
print "processing \"$c=$v\"\n" if $verbose > 3;
($c eq "delay") && ($delay = $v,1) && next;
($c eq 'samples') && (!defined($PrintIt) || !defined($samples)) &&
($samples = $v,1) && next;
($c eq 'srcprefix') && (($srcprefix=$v)=~s/\$STATHOST/$STATHOST/g,1)
&& next;
($c eq 'showoffs') &&
($showoffs = boolval($v),1) && next;
($c eq 'showfreq') &&
($showfreq = boolval($v),1) && next;
($c eq 'showcmpl') &&
($showcmpl = boolval($v),1) && next;
($c eq 'showoreg') &&
($showoreg = boolval($v),1) && next;
($c eq 'showfreg') &&
($showfreg = boolval($v),1) && next;
($c eq 'exit') && (unlink($tmpfile),die("$0: exit by config request\n"));
($c eq 'freqbase' ||
$c eq 'cmplscale') &&
do {
if (! defined($v) || $v eq "" || $v eq 'dynamic')
{
eval "undef(\$$c);";
}
else
{
eval "\$$c = \$v;";
}
next;
};
($c eq 'timebase') &&
do {
if (! defined($v) || $v eq "" || $v eq "dynamic")
{
undef($timebase);
}
else
{
$timebase=&date_time_spec2seconds($v);
}
};
($c eq 'EndTime') &&
do {
next if defined($EndTime) && defined($PrintIt);
if (! defined($v) || $v eq "" || $v eq "none")
{
undef($EndTime);
}
else
{
$EndTime=&date_time_spec2seconds($v);
}
};
($c eq 'StartTime') &&
do {
next if defined($StartTime) && defined($PrintIt);
if (! defined($v) || $v eq "" || $v eq "none")
{
undef($StartTime);
}
else
{
$StartTime=&date_time_spec2seconds($v);
}
};
($c eq 'MaxY') &&
do {
next if defined($MaxY) && defined($PrintIt);
if (! defined($v) || $v eq "" || $v eq "none")
{
undef($MaxY);
}
else
{
$MaxY=$v;
}
};
($c eq 'MinY') &&
do {
next if defined($MinY) && defined($PrintIt);
if (! defined($v) || $v eq "" || $v eq "none")
{
undef($MinY);
}
else
{
$MinY=$v;
}
};
($c eq 'deltaT') &&
do {
if (!defined($v) || $v eq "")
{
undef($deltaT);
}
else
{
$deltaT = $v;
}
next;
};
($c eq 'verbose') && ! defined($PrintIt) &&
do {
if (!defined($v) || $v == 0)
{
$verbose = 0;
}
else
{
$verbose = $v;
}
next;
};
;# otherwise: silently ignore unrecognized config line
}
close(CF);
;# set show defaults when nothing selected
$showoffs = $showfreq = $showcmpl = 1
unless $showoffs || $showfreq || $showcmpl;
if ($verbose > 3)
{
print "new configuration:\n";
print " delay\t= $delay\n";
print " samples\t= $samples\n";
print " srcprefix\t= $srcprefix\n";
print " showoffs\t= $showoffs\n";
print " showfreq\t= $showfreq\n";
print " showcmpl\t= $showcmpl\n";
print " showoreg\t= $showoreg\n";
print " showfreg\t= $showfreg\n";
printf " timebase\t= %s",defined($timebase)?&ctime($timebase):"dynamic\n";
printf " freqbase\t= %s\n",defined($freqbase) ?"$freqbase":"dynamic";
printf " cmplscale\t= %s\n",defined($cmplscale)?"$cmplscale":"dynamic";
printf " StartTime\t= %s",defined($StartTime)?&ctime($StartTime):"none\n";
printf " EndTime\t= %s", defined($EndTime) ? &ctime($EndTime):"none\n";
printf " MaxY\t= %s",defined($MaxY)? $MaxY :"none\n";
printf " MinY\t= %s",defined($MinY)? $MinY :"none\n";
print " verbose\t= $verbose\n";
}
print "configuration file read\n" if $verbose > 2;
}
sub make_doplot($$)
{
my($lo, $lf) = @_;
local($c) = ("");
local($fmt)
= ("%s \"%s\" using 1:%d title '%s <%lf %lf> %6s' with lines");
local($regfmt)
= ("%s ((%lf * x) + %lf) title 'lin. approx. %s (%f t[h]) %s %f <%f> %6s' with lines");
$doplot = " set title 'NTP loopfilter statistics for $STATHOST " .
"(last $LastCnt samples from $srcprefix*)'\n";
local($xts,$xte,$i,$t);
local($s,$c) = ("");
;# number of integral seconds to get at least 12 tic marks on x axis
$t = int(($maxtime - $mintime) / 12 + 0.5);
$t = 1 unless $t; # prevent $t to be zero
foreach $i (30,
60,5*60,15*60,30*60,
60*60,2*60*60,6*60*60,12*60*60,
24*60*60,48*60*60)
{
last if $t < $i;
$t = $t - ($t % $i);
}
print "time label resolution: $t seconds\n" if $verbose > 1;
;# make gnuplot use wall clock time labels instead of NTP seconds
for ($c="", $i = $mintime - ($mintime % $t);
$i <= $maxtime + $t;
$i += $t, $c=",")
{
$s .= $c;
((int($i / $t) % 2) &&
($s .= sprintf("'' %lf",($i - $LastTimeBase)/3600))) ||
(($t <= 60) &&
($s .= sprintf("'%d:%02d:%02d' %lf",
(localtime($i))[$[+2,$[+1,$[+0],
($i - $LastTimeBase)/3600)))
|| (($t <= 2*60*60) &&
($s .= sprintf("'%d:%02d' %lf",
(localtime($i))[$[+2,$[+1],
($i - $LastTimeBase)/3600)))
|| (($t <= 12*60*60) &&
($s .= sprintf("'%s %d:00' %lf",
$Day[(localtime($i))[$[+6]],
(localtime($i))[$[+2],
($i - $LastTimeBase)/3600)))
|| ($s .= sprintf("'%d.%d-%d:00' %lf",
(localtime($i))[$[+3,$[+4,$[+2],
($i - $LastTimeBase)/3600));
}
$doplot .= "set xtics ($s)\n";
chop($xts = &ctime($mintime));
chop($xte = &ctime($maxtime));
$doplot .= "set xlabel 'Start: $xts -- Time Scale -- End: $xte'\n";
$doplot .= "set yrange [" ;
$doplot .= defined($MinY) ? sprintf("%lf", $MinY) : $miny;
$doplot .= ':';
$doplot .= defined($MaxY) ? sprintf("%lf", $MaxY) : $maxy;
$doplot .= "]\n";
$doplot .= " plot";
$c = "";
$showoffs &&
($doplot .= sprintf($fmt,$c,$tmpfile,2,
"offset",
$minoffs,$maxoffs,
"[ms]"),
$c = ",");
$LastCmplScale = 1 if ! defined($LastCmplScale);
$showcmpl &&
($doplot .= sprintf($fmt,$c,$tmpfile,4,
"compliance" .
(&abs($LastCmplScale) > 1
? " / $LastCmplScale"
: (&abs($LastCmplScale) == 1 ? "" : " * ".(1/$LastCmplScale))),
$mincmpl/$LastCmplScale,$maxcmpl/$LastCmplScale,
""),
$c = ",");
$LastFreqBase = 0 if ! defined($LastFreqBase);
$LastFreqBaseString = "?" if ! defined($LastFreqBaseString);
$FreqScale = 1 if ! defined($FreqScale);
$FreqScaleInv = 1 if ! defined($FreqScaleInv);
$showfreq &&
($doplot .= sprintf($fmt,$c,$tmpfile,3,
"frequency" .
($LastFreqBase > 0
? " - $LastFreqBaseString"
: ($LastFreqBase == 0 ? "" : " + $LastFreqBaseString")),
$minfreq * $FreqScale - $LastFreqBase,
$maxfreq * $FreqScale - $LastFreqBase,
"[${FreqScaleInv}ppm]"),
$c = ",");
$showoreg && $showoffs &&
($doplot .= sprintf($regfmt, $c,
$lo->B(),$lo->A(),
"offset ",
$lo->B(),
(($lo->A()) < 0 ? '-' : '+'),
&abs($lo->A()), $lo->r(),
"[ms]"),
$c = ",");
$showfreg && $showfreq &&
($doplot .= sprintf($regfmt, $c,
$lf->B() * $FreqScale,
($lf->A() + $minfreq) * $FreqScale - $LastFreqBase,
"frequency",
$lf->B() * $FreqScale,
(($lf->A() + $minfreq) * $FreqScale - $LastFreqBase) < 0 ? '-' : '+',
&abs(($lf->A() + $minfreq) * $FreqScale - $LastFreqBase),
$lf->r(),
"[${FreqScaleInv}ppm]"),
$c = ",");
$doplot .= "\n";
}
%F_key = ();
%F_name = ();
%F_size = ();
%F_mtime = ();
%F_first = ();
%F_last = ();
sub genfile
{
local($cnt,$in,$out,$lo,$lf,@fpos) = @_;
local(@F,@t,$t,$lastT) = ();
local(@break,@time,@offs,@freq,@cmpl,@loffset,@filekey) = ();
local($lm,$l,@f);
local($sdir,$sname);
;# allocate some storage for the tables
;# otherwise realloc may get into troubles
if (defined($StartTime) && defined($EndTime))
{
$l = ($EndTime-$StartTime) -$[+1 +1; # worst case: 1 sample per second
}
else
{
$l = $cnt + 10;
}
print "preextending arrays to $l entries\n" if $verbose > 2;
$#break = $l; for ($i=$[; $i<=$l;$i++) { $break[$i] = 0; }
$#time = $l; for ($i=$[; $i<=$l;$i++) { $time[$i] = 0; }
$#offs = $l; for ($i=$[; $i<=$l;$i++) { $offs[$i] = 0; }
$#freq = $l; for ($i=$[; $i<=$l;$i++) { $freq[$i] = 0; }
$#cmpl = $l; for ($i=$[; $i<=$l;$i++) { $cmpl[$i] = 0; }
$#loffset = $l; for ($i=$[; $i<=$l;$i++) { $loffset[$i] = 0; }
$#filekey = $l; for ($i=$[; $i<=$l;$i++) { $filekey[$i] = 0; }
;# now reduce size again
$#break = $[ - 1;
$#time = $[ - 1;
$#offs = $[ - 1;
$#freq = $[ - 1;
$#cmpl = $[ - 1;
$#loffset = $[ - 1;
$#filekey = $[ - 1;
print "memory allocation ready\n" if $verbose > 2;
sleep(3) if $verbose > 1;
$fpos[$[] = '' if !defined($fpos[$[]);
if (index($in,"/") < $[)
{
$sdir = ".";
$sname = $in;
}
else
{
($sdir,$sname) = ($in =~ m!^(.*)/([^/]*)!);
$sname = "" unless defined($sname);
}
$Ltime = -1 if ! defined($Ltime);
if (!defined($Lsdir) || $Lsdir ne $sdir || $Ltime != (stat($sdir))[$[+9] ||
grep($F_mtime{$_} != (stat($F_name{$_}))[$[+9], @F_files))
{
print "rescanning directory \"$sdir\" for files \"$sname*\"\n"
if $verbose > 1;
;# rescan directory on changes
$Lsdir = $sdir;
$Ltime = (stat($sdir))[$[+9];
</X{> if 0; # dummy line - calm down my formatter
local(@newfiles) = < ${in}*[0-9] >;
local($st_dev,$st_ino,$st_mtime,$st_size,$name,$key,$modified);
foreach $name (@newfiles)
{
($st_dev,$st_ino,$st_size,$st_mtime) =
(stat($name))[$[,$[+1,$[+7,$[+9];
$modified = 0;
$key = sprintf("%lx|%lu", $st_dev, $st_ino);
print "candidate file \"$name\"",
(defined($st_dev) ? "" : " failed: $!"),"\n"
if $verbose > 2;
if (! defined($F_key{$name}) || $F_key{$name} ne $key)
{
$F_key{$name} = $key;
$modified++;
}
if (!defined($F_name{$key}) || $F_name{$key} ne $name)
{
$F_name{$key} = $name;
$modified++;
}
if (!defined($F_size{$key}) || $F_size{$key} != $st_size)
{
$F_size{$key} = $st_size;
$modified++;
}
if (!defined($F_mtime{$key}) || $F_mtime{$key} != $st_mtime)
{
$F_mtime{$key} = $st_mtime;
$modified++;
}
if ($modified)
{
print "new data \"$name\" key: $key;\n" if $verbose > 1;
print " size: $st_size; mtime: $st_mtime;\n"
if $verbose > 1;
$F_last{$key} = $F_first{$key} = $st_mtime;
$F_first{$key}--; # prevent zero divide later on
;# now compute derivated attributes
open(IN, "<$name") ||
do {
warn "$0: failed to open \"$name\": $!";
next;
};
while(<IN>)
{
@F = split;
next if @F < 5;
next if $F[$[] eq "";
$t = ($F[$[] - $MJD_1970) * 24 * 60 * 60;
$t += $F[$[+1];
$F_first{$key} = $t;
print "\tfound first entry: $t ",&ctime($t)
if $verbose > 4;
last;
}
seek(IN,
($st_size > 4*$RecordSize) ? $st_size - 4*$RecordSize : 0,
0);
while(<IN>)
{
@F = split;
next if @F < 5;
next if $F[$[] eq "";
$t = ($F[$[] - $MJD_1970) * 24 * 60 * 60;
$t += $F[$[+1];
$F_last{$key} = $t;
$_ = <IN>;
print "\tfound last entry: $t ", &ctime($t)
if $verbose > 4 && ! defined($_);
last unless defined($_);
redo;
;# Ok, calm down...
;# using $_ = <IN> in conjunction with redo
;# is semantically equivalent to the while loop, but
;# I needed a one line look ahead and this solution
;# was what I thought of first
;# and.. If you do not like it dont look
}
close(IN);
print(" first: ",$F_first{$key},
" last: ",$F_last{$key},"\n") if $verbose > 1;
}
}
;# now reclaim memory used for files no longer referenced ...
local(%Names);
grep($Names{$_} = 1,@newfiles);
foreach (keys %F_key)
{
next if defined($Names{$_});
delete $F_key{$_};
$verbose > 2 && print "no longer referenced: \"$_\"\n";
}
%Names = ();
grep($Names{$_} = 1,values(%F_key));
foreach (keys %F_name)
{
next if defined($Names{$_});
delete $F_name{$_};
$verbose > 2 && print "unref name($_)= $F_name{$_}\n";
}
foreach (keys %F_size)
{
next if defined($Names{$_});
delete $F_size{$_};
$verbose > 2 && print "unref size($_)\n";
}
foreach (keys %F_mtime)
{
next if defined($Names{$_});
delete $F_mtime{$_};
$verbose > 2 && print "unref mtime($_)\n";
}
foreach (keys %F_first)
{
next if defined($Names{$_});
delete $F_first{$_};
$verbose > 2 && print "unref first($_)\n";
}
foreach (keys %F_last)
{
next if defined($Names{$_});
delete $F_last{$_};
$verbose > 2 && print "unref last($_)\n";
}
;# create list sorted by time
@F_files = sort {$F_first{$a} <=> $F_first{$b}; } keys(%F_name);
if ($verbose > 1)
{
print "Resulting file list:\n";
foreach (@F_files)
{
print "\t$_\t$F_name{$_}\n";
}
}
}
printf("processing %s; output \"$out\" (%d input files)\n",
((defined($StartTime) && defined($EndTime))
? "time range"
: (defined($StartTime) ? "$cnt samples from StartTime" :
(defined($EndTime) ? "$cnt samples to EndTime" :
"last $cnt samples"))),
scalar(@F_files))
if $verbose > 1;
;# open output file - will be input for plotcmd
open(OUT,">$out") ||
do {
warn("$0: cannot create \"$out\": $!\n");
};
@f = @F_files;
if (defined($StartTime))
{
while (@f && ($F_last{$f[$[]} < $StartTime))
{
print("shifting ", $F_name{$f[$[]},
" last: ", $F_last{$f[$[]},
" < StartTime: $StartTime\n")
if $verbose > 3;
shift(@f);
}
}
if (defined($EndTime))
{
while (@f && ($F_first{$f[$#f]} > $EndTime))
{
print("popping ", $F_name{$f[$#f]},
" first: ", $F_first{$f[$#f]},
" > EndTime: $EndTime\n")
if $verbose > 3;
pop(@f);
}
}
if (@f)
{
if (defined($StartTime))
{
print "guess start according to StartTime ($StartTime)\n"
if $verbose > 3;
if ($fpos[$[] eq 'start')
{
if (grep($_ eq $fpos[$[+1],@f))
{
shift(@f) while @f && $f[$[] ne $fpos[$[+1];
}
else
{
@fpos = ('start', $f[$[], undef);
}
}
else
{
@fpos = ('start' , $f[$[], undef);
}
if (!defined($fpos[$[+2]))
{
if ($StartTime <= $F_first{$f[$[]})
{
$fpos[$[+2] = 0;
}
else
{
$fpos[$[+2] =
int($F_size{$f[$[]} *
(($StartTime - $F_first{$f[$[]})/
($F_last{$f[$[]} - $F_first{$f[$[]})));
$fpos[$[+2] = ($fpos[$[+2] <= 2 * $RecordSize)
? 0 : $fpos[$[+2] - 2 * $RecordSize;
;# anyway as the data may contain "time holes"
;# our heuristics may baldly fail
;# so just start at 0
$fpos[$[+2] = 0;
}
}
}
elsif (defined($EndTime))
{
print "guess starting point according to EndTime ($EndTime)\n"
if $verbose > 3;
if ($fpos[$[] eq 'end')
{
if (grep($_ eq $fpos[$[+1],@f))
{
shift(@f) while @f && $f[$[] ne $fpos[$[+1];
}
else
{
@fpos = ('end', $f[$[], undef);
}
}
else
{
@fpos = ('end', $f[$[], undef);
}
if (!defined($fpos[$[+2]))
{
local(@x) = reverse(@f);
local($s,$c) = (0,$cnt);
if ($EndTime < $F_last{$x[$[]})
{
;# last file will only be used partially
$s = int($F_size{$x[$[]} *
(($EndTime - $F_first{$x[$[]}) /
($F_last{$x[$[]} - $F_first{$x[$[]})));
$s = int($s/$RecordSize);
$c -= $s - 1;
if ($c <= 0)
{
;# start is in the same file
$fpos[$[+1] = $x[$[];
$fpos[$[+2] = ($c >=-2) ? 0 : (-$c - 2) * $RecordSize;
shift(@f) while @f && ($f[$[] ne $x[$[]);
}
else
{
shift(@x);
}
}
if (!defined($fpos[$[+2]))
{
local($_);
while($_ = shift(@x))
{
$s = int($F_size{$_}/$RecordSize);
$c -= $s - 1;
if ($c <= 0)
{
$fpos[$[+1] = $_;
$fpos[$[+2] = ($c>-2) ? 0 : (-$c - 2) * $RecordSize;
shift(@f) while @f && ($f[$[] ne $_);
last;
}
}
}
}
}
else
{
print "guessing starting point according to count ($cnt)\n"
if $verbose > 3;
;# guess offset to get last available $cnt samples
if ($fpos[$[] eq 'cnt')
{
if (grep($_ eq $fpos[$[+1],@f))
{
print "old positioning applies\n" if $verbose > 3;
shift(@f) while @f && $f[$[] ne $fpos[$[+1];
}
else
{
@fpos = ('cnt', $f[$[], undef);
}
}
else
{
@fpos = ('cnt', $f[$[], undef);
}
if (!defined($fpos[$[+2]))
{
local(@x) = reverse(@f);
local($s,$c) = (0,$cnt);
local($_);
while($_ = shift(@x))
{
print "examing \"$_\" $c samples still needed\n"
if $verbose > 4;
$s = int($F_size{$_}/$RecordSize);
$c -= $s - 1;
if ($c <= 0)
{
$fpos[$[+1] = $_;
$fpos[$[+2] = ($c>-2) ? 0 : (-$c - 2) * $RecordSize;
shift(@f) while @f && ($f[$[] ne $_);
last;
}
}
if (!defined($fpos[$[+2]))
{
print "no starting point yet - using start of data\n"
if $verbose > 2;
$fpos[$[+2] = 0;
}
}
}
}
print "Ooops, no suitable input file ??\n"
if $verbose > 1 && @f <= 0;
printf("Starting at (%s) \"%s\" offset %ld using %d files\n",
$fpos[$[+1],
$F_name{$fpos[$[+1]},
$fpos[$[+2],
scalar(@f))
if $verbose > 2;
$lm = 1;
$l = 0;
foreach $key (@f)
{
$file = $F_name{$key};
print "processing file \"$file\"\n" if $verbose > 2;
open(IN,"<$file") ||
(warn("$0: cannot read \"$file\": $!\n"), next);
;# try to seek to a position nearer to the start of the interesting lines
;# should always affect only first item in @f
($key eq $fpos[$[+1]) &&
(($verbose > 1) &&
print("Seeking to offset $fpos[$[+2]\n"),
seek(IN,$fpos[$[+2],0) ||
warn("$0: seek(\"$F_name{$key}\" failed: $|\n"));
while(<IN>)
{
$l++;
($verbose > 3) &&
(($l % $lm) == 0 && print("\t$l lines read\n") &&
(($l == 2) && ($lm = 10) ||
($l == 100) && ($lm = 100) ||
($l == 500) && ($lm = 500) ||
($l == 1000) && ($lm = 1000) ||
($l == 5000) && ($lm = 5000) ||
($l == 10000) && ($lm = 10000)));
@F = split;
next if @F < 6; # no valid input line is this short
next if $F[$[] eq "";
next if ($F[$[] !~ /^\d+$/);
($F[$[] !~ /^\d+$/) && # A 'never should have happend' error
die("$0: unexpected input line: >$_<\n");
;# modified Julian to UNIX epoch
$t = ($F[$[] - $MJD_1970) * 24 * 60 * 60;
$t += $F[$[+1]; # add seconds + fraction
;# multiply offset by 1000 to get ms - try to avoid float op
(($F[$[+2] =~ s/(\d*)\.(\d{3})(\d*)/$1$2.$3/) &&
$F[$[+2] =~ s/0+([\d\.])/($1 eq '.') ? '0.' : $1/e) # strip leading zeros
|| ($F[$[+2] *= 1000);
;# skip samples out of specified time range
next if (defined($StartTime) && $StartTime > $t);
next if (defined($EndTime) && $EndTime < $t);
next if defined($lastT) && $t < $lastT; # backward in time ??
push(@offs,$F[$[+2]);
push(@freq,$F[$[+3] * (2**20/10**6));
push(@cmpl,$F[$[+5]);
push(@break, (defined($lastT) && ($t - $lastT > $deltaT)));
$lastT = $t;
push(@time,$t);
push(@loffset, tell(IN) - length($_));
push(@filekey, $key);
shift(@break),shift(@time),shift(@offs),
shift(@freq), shift(@cmpl),shift(@loffset),
shift(@filekey)
if @time > $cnt &&
! (defined($StartTime) && defined($EndTime));
last if @time >= $cnt && defined($StartTime) && !defined($EndTime);
}
close(IN);
last if @time >= $cnt && defined($StartTime) && !defined($EndTime);
}
print "input scanned ($l lines/",scalar(@time)," samples)\n"
if $verbose > 1;
if (@time)
{
local($_,@F);
local($timebase) unless defined($timebase);
local($freqbase) unless defined($freqbase);
local($cmplscale) unless defined($cmplscale);
undef $mintime;
undef $maxtime;
undef $minoffs;
undef $maxoffs;
undef $minfreq;
undef $maxfreq;
undef $mincmpl;
undef $maxcmpl;
undef $miny;
undef $maxy ;
print "computing ranges\n" if $verbose > 2;
$LastCnt = @time;
;# @time is in ascending order (;-)
$mintime = $time[$[];
$maxtime = $time[$#time];
unless (defined($timebase))
{
local($time,@X) = (time);
@X = localtime($time);
;# compute today 00:00:00
$timebase = $time - ((($X[$[+2]*60)+$X[$[+1])*60+$X[$[]);
}
$LastTimeBase = $timebase;
if ($showoffs)
{
local($i,$m,$f);
$minoffs = &min(@offs);
$maxoffs = &max(@offs);
;# I know, it is not perl style using indices to access arrays,
;# but I have to proccess two arrays in sync, non-destructively
;# (otherwise a (shift(@a1),shift(a2)) would do),
;# I dont like to make copies of these arrays as they may be huge
$i = $[;
$lo->sample(($time[$i]-$timebase)/3600,$offs[$i]),$i++
while $i <= $#time;
($minoffs == $maxoffs) && ($minoffs -= 0.1,$maxoffs += 0.1);
$i = $lo->sigma();
$m = $lo->mean();
print "mean offset: $m sigma: $i\n" if $verbose > 2;
if (($maxoffs - $minoffs) > $MinClip)
{
$f = (&abs($minoffs) < &abs($maxoffs)) ? $FuzzLow : $FuzzBig;
$miny = (($m - $minoffs) <= ($f * $i))
? $minoffs : ($m - $f * $i);
$f = ($f == $FuzzLow) ? $FuzzBig : $FuzzLow;
$maxy = (($maxoffs - $m) <= ($f * $i))
? $maxoffs : ($m + $f * $i);
}
else
{
$miny = $minoffs;
$maxy = $maxoffs;
}
($maxy-$miny) == 0 &&
(($maxy,$miny)
= (($maxoffs - $minoffs) > 0)
? ($maxoffs,$minoffs) : ($MinClip,-$MinClip));
$maxy = $MaxY if defined($MaxY) && $MaxY < $maxy;
$miny = $MinY if defined($MinY) && $MinY > $miny;
print "offset min clipped from $minoffs to $miny\n"
if $verbose > 2 && $minoffs != $miny;
print "offset max clipped from $maxoffs to $maxy\n"
if $verbose > 2 && $maxoffs != $maxy;
}
if ($showfreq)
{
local($i,$m);
$minfreq = &min(@freq);
$maxfreq = &max(@freq);
$i = $[;
$lf->sample(($time[$i]-$timebase)/3600,$freq[$i]-$minfreq),
$i++
while $i <= $#time;
$i = $lf->sigma();
$m = $lf->mean() + $minfreq;
print "mean frequency: $m sigma: $i\n" if $verbose > 2;
if (defined($maxy))
{
local($s) =
($maxfreq - $minfreq)
? ($maxy - $miny) / ($maxfreq - $minfreq) : 1;
if (defined($freqbase))
{
$FreqScale = 1;
$FreqScaleInv = "";
}
else
{
$FreqScale = 1;
$FreqScale = 10 ** int(log($s)/log(10) - 0.9999);
$FreqScaleInv =
("$FreqScale" =~ /^10(0*)$/) ? "0.${1}1" :
($FreqScale == 1 ? "" : (1/$FreqScale));
$freqbase = ($maxfreq + $minfreq)/ 2 * $FreqScale; #$m * $FreqScale;
$freqbase -= ($maxy + $miny) / 2; #$lf->mean();
;# round resulting freqbase
;# to precision of min max difference
$s = -12;
$s = int(log(($maxfreq-$minfreq)*$FreqScale)/log(10))-1
unless ($maxfreq-$minfreq) < 1e-12;
$s = 10 ** $s;
$freqbase = int($freqbase / $s) * $s;
}
}
else
{
$FreqScale = 1;
$FreqScaleInv = "";
$freqbase = $m unless defined($freqbase);
if (($maxfreq - $minfreq) > $MinClip)
{
$f = (&abs($minfreq) < &abs($maxfreq))
? $FuzzLow : $FuzzBig;
$miny = (($freqbase - $minfreq) <= ($f * $i))
? ($minfreq-$freqbase) : (- $f * $i);
$f = ($f == $FuzzLow) ? $FuzzBig : $FuzzLow;
$maxy = (($maxfreq - $freqbase) <= ($f * $i))
? ($maxfreq-$freqbase) : ($f * $i);
}
else
{
$miny = $minfreq - $freqbase;
$maxy = $maxfreq - $freqbase;
}
($maxy - $miny) == 0 &&
(($maxy,$miny) =
(($maxfreq - $minfreq) > 0)
? ($maxfreq-$freqbase,$minfreq-$freqbase) : (0.5,-0.5));
$maxy = $MaxY if defined($MaxY) && $MaxY < $maxy;
$miny = $MinY if defined($MinY) && $MinY > $miny;
print("frequency min clipped from ",$minfreq-$freqbase,
" to $miny\n")
if $verbose > 2 && $miny != ($minfreq - $freqbase);
print("frequency max clipped from ",$maxfreq-$freqbase,
" to $maxy\n")
if $verbose > 2 && $maxy != ($maxfreq - $freqbase);
}
$LastFreqBaseString =
sprintf("%g",$freqbase >= 0 ? $freqbase : -$freqbase);
$LastFreqBase = $freqbase;
print "LastFreqBaseString now \"$LastFreqBaseString\"\n"
if $verbose > 5;
}
else
{
$FreqScale = 1;
$FreqScaleInv = "";
$LastFreqBase = 0;
$LastFreqBaseString = "";
}
if ($showcmpl)
{
$mincmpl = &min(@cmpl);
$maxcmpl = &max(@cmpl);
if (!defined($cmplscale))
{
if (defined($maxy))
{
local($cmp)
= (&abs($miny) > &abs($maxy)) ? &abs($miny) : $maxy;
$cmplscale = $cmp == $maxy ? 1 : -1;
foreach (0.01, 0.02, 0.05,
0.1, 0.2, 0.25, 0.4, 0.5,
1, 2, 4, 5,
10, 20, 25, 50,
100, 200, 250, 500, 1000)
{
$cmplscale *= $_, last if $maxcmpl/$_ <= $cmp;
}
}
else
{
$cmplscale = 1;
$miny = $mincmpl ? 0 : -$MinClip;
$maxy = $maxcmpl+$MinClip;
}
}
$LastCmplScale = $cmplscale;
}
else
{
$LastCmplScale = 1;
}
print "creating plot command input file\n" if $verbose > 2;
print OUT ("# preprocessed NTP statistics file for $STATHOST\n");
print OUT ("# timebase is: ",&ctime($LastTimeBase))
if defined($LastTimeBase);
print OUT ("# frequency is offset by ",
($LastFreqBase >= 0 ? "+" : "-"),
"$LastFreqBaseString [${FreqScaleInv}ppm]\n");
print OUT ("# compliance is scaled by $LastCmplScale\n");
print OUT ("# time [h]\toffset [ms]\tfrequency [${FreqScaleInv}ppm]\tcompliance\n");
printf OUT ("%s%lf\t%lf\t%lf\t%lf\n",
(shift(@break) ? "\n" : ""),
(shift(@time) - $LastTimeBase)/3600,
shift(@offs),
shift(@freq) * $FreqScale - $LastFreqBase,
shift(@cmpl) / $LastCmplScale)
while(@time);
}
else
{
;# prevent plotcmd from processing empty file
print "Creating plot command dummy...\n" if $verbose > 2;
print OUT "# dummy samples\n0 1 2 3\n1 1 2 3\n";
$lo->sample(0,1);
$lo->sample(1,1);
$lf->sample(0,2);
$lf->sample(1,2);
@time = (0, 1); $maxtime = 1; $mintime = 0;
@offs = (1, 1); $maxoffs = 1; $minoffs = 1;
@freq = (2, 2); $maxfreq = 2; $minfreq = 2;
@cmpl = (3, 3); $maxcmpl = 3; $mincmpl = 3;
$LastCnt = 2;
$LastFreqBase = 0;
$LastCmplScale = 1;
$LastTimeBase = 0;
$miny = -$MinClip;
$maxy = 3 + $MinClip;
}
close(OUT);
print "plot command input file created\n"
if $verbose > 2;
if (($fpos[$[] eq 'cnt' && scalar(@loffset) >= $cnt) ||
($fpos[$[] eq 'start' && $mintime <= $StartTime) ||
($fpos[$[] eq 'end'))
{
return ($fpos[$[],$filekey[$[],$loffset[$[]);
}
else # found to few lines - next time start search earlier in file
{
if ($fpos[$[] eq 'start')
{
;# the timestamps we got for F_first and F_last guaranteed
;# that no file is left out
;# the only thing that could happen is:
;# we guessed the starting point wrong
;# compute a new guess from the first record found
;# if this equals our last guess use data of first record
;# otherwise try new guess
if ($fpos[$[+1] eq $filekey[$[] && $loffset[$[] > $fpos[$[+2])
{
local($noff);
$noff = $loffset[$[] - ($cnt - @loffset + 1) * $RecordSize;
$noff = 0 if $noff < 0;
return (@fpos[$[,$[+1], ($noff == $fpos[$[+2]) ? $loffset[$[] : $noff);
}
return ($fpos[$[],$filekey[$[],$loffset[$[]);
}
elsif ($fpos[$[] eq 'end' || $fpos[$[] eq 'cnt')
{
;# try to start earlier in file
;# if we already started at the beginning
;# try to use previous file
;# this assumes distance to better starting point is at most one file
;# the primary guess at top of genfile() should usually allow this
;# assumption
;# if the offset of the first sample used is within
;# a different file than we guessed it must have occurred later
;# in the sequence of files
;# this only can happen if our starting file did not contain
;# a valid sample from the starting point we guessed
;# however this does not invalidate our assumption, no check needed
local($noff,$key);
if ($fpos[$[+2] > 0)
{
$noff = $fpos[$[+2] - $RecordSize * ($cnt - @loffset + 1);
$noff = 0 if $noff < 0;
return (@fpos[$[,$[+1],$noff);
}
else
{
if ($fpos[$[+1] eq $F_files[$[])
{
;# first file - and not enough samples
;# use data of first sample
return ($fpos[$[], $filekey[$[], $loffset[$[]);
}
else
{
;# search key of previous file
$key = $F_files[$[];
@F = reverse(@F_files);
while ($_ = shift(@F))
{
if ($_ eq $fpos[$[+1])
{
$key = shift(@F) if @F;
last;
}
}
$noff = int($F_size{$key} / $RecordSize);
$noff -= $cnt - @loffset;
$noff = 0 if $noff < 0;
$noff *= $RecordSize;
return ($fpos[$[], $key, $noff);
}
}
}
else
{
return ();
}
return 0 if @loffset <= 1 || ($loffset[$#loffset] - $loffset[$[]) <= 1;
;# EOF - 1.1 * avg(line) * $cnt
local($val) = $loffset[$#loffset]
- $cnt * 11 * (($loffset[$#loffset] - $loffset[$[]) / @loffset) / 10;
return ($val < 0) ? 0 : $val;
}
}
$Ltime = -1 if ! defined($Ltime);
$LastFreqBase = 0;
$LastFreqBaseString = "??";
;# initial setup of plot
print "initialize plotting\n" if $verbose;
if (defined($PrintIt))
{
if ($PrintIt =~ m,/,)
{
print "Saving plot to file $PrintIt\n";
print PLOT "set output '$PrintIt'\n";
}
else
{
print "Printing plot on printer $PrintIt\n";
print PLOT "set output '| lpr -P$PrintIt -h'\n";
}
print PLOT "set terminal postscript landscape color solid 'Helvetica' 10\n";
}
print PLOT "set grid\n";
print PLOT "set tics out\n";
print PLOT "set format y '%g '\n";
printf PLOT "set time 47\n" unless defined($PrintIt);
@filepos =();
while(1)
{
print &ctime(time) if $verbose;
;# update diplay characteristics
&read_config;# unless defined($PrintIt);
unlink($tmpfile);
my $lo = lr->new();
my $lf = lr->new();
@filepos = &genfile($samples,$srcprefix,$tmpfile,$lo,$lf,@filepos);
;# make plotcmd display samples
make_doplot($lo, $lf);
print "Displaying plot...\n" if $verbose > 1;
print "command for plot sub process:\n$doplot----\n" if $verbose > 3;
print PLOT $doplot;
}
continue
{
if (defined($PrintIt))
{
delete $SIG{'CHLD'};
print PLOT "quit\n";
close(PLOT);
if ($PrintIt =~ m,/,)
{
print "Plot saved to file $PrintIt\n";
}
else
{
print "Plot spooled to printer $PrintIt\n";
}
unlink($tmpfile);
exit(0);
}
;# wait $delay seconds
print "waiting $delay seconds ..." if $verbose > 2;
sleep($delay);
print " continuing\n" if $verbose > 2;
undef($LastFreqBaseString);
}
sub date_time_spec2seconds
{
local($_) = @_;
;# a date_time_spec consistes of:
;# YYYY-MM-DD_HH:MM:SS.ms
;# values can be omitted from the beginning and default than to
;# values of current date
;# values omitted from the end default to lowest possible values
local($time) = time;
local($sec,$min,$hour,$mday,$mon,$year)
= localtime($time);
local($last) = ();
s/^\D*(.*\d)\D*/$1/; # strip off garbage
PARSE:
{
if (s/^(\d{4})(-|$)//)
{
if ($1 < 1970)
{
warn("$0: can not handle years before 1970 - year $1 ignored\n");
return undef;
}
elsif ( $1 >= 2070)
{
warn("$0: can not handle years past 2070 - year $1 ignored\n");
return undef;
}
else
{
$year = $1 % 100; # 0<= $year < 100
;# - interpreted 70 .. 99,00 .. 69
}
$last = $[ + 5;
last PARSE if $_ eq '';
warn("$0: bad date_time_spec: \"$_\" found after YEAR\n"),
return(undef)
if $2 eq '';
}
if (s/^(\d{1,2})(-|$)//)
{
warn("$0: implausible month $1\n"),return(undef)
if $1 < 1 || $1 > 12;
$mon = $1 - 1;
$last = $[ + 4;
last PARSE if $_ eq '';
warn("$0: bad date_time_spec: \"$_\" found after MONTH\n"),
return(undef)
if $2 eq '';
}
else
{
warn("$0: bad date_time_spec \"$_\"\n"),return(undef)
if defined($last);
}
if (s/^(\d{1,2})([_ ]|$)//)
{
warn("$0: implausible month day $1 for month ".($mon+1)." (".
$MaxNumDaysPerMonth[$mon].")$mon\n"),
return(undef)
if $1 < 1 || $1 > $MaxNumDaysPerMonth[$mon];
$mday = $1;
$last = $[ + 3;
last PARSE if $_ eq '';
warn("$0: bad date_time_spec \"$_\" found after MDAY\n"),
return(undef)
if $2 eq '';
}
else
{
warn("$0: bad date_time_spec \"$_\"\n"), return undef
if defined($last);
}
;# now we face a problem:
;# if ! defined($last) a prefix of "07:"
;# can be either 07:MM or 07:ss
;# to get the second interpretation make the user add
;# a msec fraction part and check for this special case
if (! defined($last) && s/^(\d{1,2}):(\d{1,2}\.\d+)//)
{
warn("$0: implausible minute $1\n"), return undef
if $1 < 0 || $1 >= 60;
warn("$0: implausible second $1\n"), return undef
if $2 < 0 || $2 >= 60;
$min = $1;
$sec = $2;
$last = $[ + 1;
last PARSE if $_ eq '';
warn("$0: bad date_time_spec \"$_\" after SECONDS\n");
return undef;
}
if (s/^(\d{1,2})(:|$)//)
{
warn("$0: implausible hour $1\n"), return undef
if $1 < 0 || $1 > 24;
$hour = $1;
$last = $[ + 2;
last PARSE if $_ eq '';
warn("$0: bad date_time_spec found \"$_\" after HOUR\n"),
return undef
if $2 eq '';
}
else
{
warn("$0: bad date_time_spec \"$_\"\n"), return undef
if defined($last);
}
if (s/^(\d{1,2})(:|$)//)
{
warn("$0: implausible minute $1\n"), return undef
if $1 < 0 || $1 >=60;
$min = $1;
$last = $[ + 1;
last PARSE if $_ eq '';
warn("$0: bad date_time_spec found \"$_\" after MINUTE\n"),
return undef
if $2 eq '';
}
else
{
warn("$0: bad date_time_spec \"$_\"\n"), return undef
if defined($last);
}
if (s/^(\d{1,2}(\.\d+)?)//)
{
warn("$0: implausible second $1\n"), return undef
if $1 < 0 || $1 >=60;
$sec = $1;
$last = $[;
last PARSE if $_ eq '';
warn("$0: bad date_time_spec found \"$_\" after SECOND\n");
return undef;
}
}
return $time unless defined($last);
$sec = 0 if $last > $[;
$min = 0 if $last > $[ + 1;
$hour = 0 if $last > $[ + 2;
$mday = 1 if $last > $[ + 3;
$mon = 0 if $last > $[ + 4;
local($rtime) = &timelocal($sec,$min,$hour,$mday,$mon,$year, 0,0, 0);
;# $rtime may be off if daylight savings time is in effect at given date
return $rtime + ($sec - int($sec))
if $hour == (localtime($rtime))[$[+2];
return
&timelocal($sec,$min,$hour,$mday,$mon,$year, 0,0, 1)
+ ($sec - int($sec));
}
sub min
{
local($m) = shift;
grep((($m > $_) && ($m = $_),0),@_);
$m;
}
sub max
{
local($m) = shift;
grep((($m < $_) && ($m = $_),0),@_);
$m;
}