test strptime stuff

Changes

@@ -1,44 +1,3 @@
-feedgnuplot (1.39)
-
-  * by default, histograms are plotted in expected ways
-
- -- Dima Kogan <dima@secretsauce.net>  Sat, 15 Oct 2016 20:45:15 -0700
-
-feedgnuplot (1.38)
-
-  * hardcopy defaults:
-   - no enhanced text mode
-   - larger font size
-
- -- Dima Kogan <dima@secretsauce.net>  Wed, 27 Jul 2016 22:15:11 -0700
-
-feedgnuplot (1.37)
-
-  * At the end of a streaming plot, include the last chunk of data
-  * Added --equation to the completions
-
- -- Dima Kogan <dima@secretsauce.net>  Fri, 01 Jan 2016 08:09:43 -0800
-
-feedgnuplot (1.36)
-
-  * Added --equation to plot symbolic equations
-
- -- Dima Kogan <dima@secretsauce.net>  Fri, 13 Nov 2015 11:08:26 -0800
-
-feedgnuplot (1.35)
-
-  * replaced a 'say' with 'print'. Should work better with ancient perls
-  * an "exit" command now has effect even with triggered-only replotting
-
-  * More sophisticated handling of termination conditions:
-    - Without --exit, we always end up with an interactive plot when the
-    input data is exhausted or when the user sends a ^C to the pipeline
-    - When streaming, the first ^C does not kill feedgnuplot
-  
-  * Removed threading
-
- -- Dima Kogan <dima@secretsauce.net>  Sun, 01 Nov 2015 12:50:33 -0800
-
 feedgnuplot (1.34)
 
   * Fix for "Use of implicit split to @_ is deprecated". Thanks to Corey

bin/feedgnuplot

@@ -7,14 +7,16 @@ use warnings;
 use Getopt::Long;
 use Time::HiRes qw( usleep gettimeofday tv_interval );
 use IO::Handle;
-use IO::Select;
-use List::Util qw( first any );
+use List::Util qw( first );
 use Scalar::Util qw( looks_like_number );
-use Text::ParseWords; # for shellwords
+use Text::ParseWords;
+use threads;
+use threads::shared;
+use Thread::Queue;
 use Pod::Usage;
-use Time::Piece;
+use DateTime::Format::Strptime;
 
-my $VERSION = 1.39;
+my $VERSION = 1.34;
 
 my %options;
 interpretCommandline();
@@ -27,11 +29,19 @@ interpretCommandline();
 # with --xlen, the offsets are preserved by using $curve->{datastring_offset} to
 # represent the offset IN THE ORIGINAL STRING of the current start of the
 # datastring
+
+
+
+my $strptime;
+
 my @curves = ();
 
 # list mapping curve names to their indices in the @curves list
 my %curveIndices = ();
 
+# now start the data acquisition and plotting threads
+my $dataQueue;
+
 # Whether any new data has arrived since the last replot
 my $haveNewData;
 
@@ -41,16 +51,40 @@ my $last_replot_time = [gettimeofday];
 # whether the previous replot was timer based
 my $last_replot_is_from_timer = 1;
 
+my $streamingFinished : shared = undef;
 
-my $prev_timed_replot_time = [gettimeofday];
-my $this_replot_is_from_timer;
-my $stdin    = IO::Handle->new();
-die "Couldn't open STDIN" unless $stdin->fdopen(fileno(STDIN),"r");
-my $selector = IO::Select->new( $stdin );
+if($options{stream})
+{
+  $dataQueue  = Thread::Queue->new();
+  my $addThr  = threads->create(\&mainThread);
 
+  # spawn the plot updating thread. If I'm replotting from a data trigger, I don't need this
+  my $plotThr = threads->create(\&plotUpdateThread) if $options{stream} > 0;
 
+  while(<>)
+  {
+    chomp;
 
-mainThread();
+    last if /^exit/;
+
+    # place every line of input to the queue, so that the plotting thread can process it. if we are
+    # using an implicit domain (x = line number), then we send it on the data queue also, since
+    # $. is not meaningful in the plotting thread
+    if(!$options{domain})
+    {
+      $_ .= " $.";
+    }
+    $dataQueue->enqueue($_);
+  }
+
+  $streamingFinished = 1;
+  $dataQueue->enqueue(undef);
+
+  $plotThr->join() if defined $plotThr;
+  $addThr->join();
+}
+else
+{ mainThread(); }
 
 
 
@@ -89,7 +123,6 @@ sub interpretCommandline
   $options{extracmds}  = [];
   $options{set}        = [];
   $options{unset}      = [];
-  $options{equation}   = [];
 
   $options{curvestyleall} = '';
   $options{styleall}      = '';
@@ -103,7 +136,6 @@ sub interpretCommandline
              'zmin=f', 'zmax=f', 'y2=s@',
              'style=s{2}', 'curvestyle=s{2}', 'curvestyleall=s', 'styleall=s', 'with=s', 'extracmds=s@', 'set=s@', 'unset=s@',
              'square!', 'square_xy!', 'hardcopy=s', 'maxcurves=i', 'monotonic!', 'timefmt=s',
-             'equation=s@',
              'histogram=s@', 'binwidth=f', 'histstyle=s',
              'terminal=s',
              'rangesize=s{2}', 'rangesizeall=i', 'extraValuesPerPoint=i',
@@ -138,41 +170,17 @@ sub interpretCommandline
   # --curvestyleall, so fill that in
   if( $options{styleall} )
   {
-    if($options{curvestyleall} ) { $options{curvestyleall} .= " $options{styleall}"; }
-    else                         { $options{curvestyleall}  =   $options{styleall};  }
-    delete $options{styleall};
+    if($options{curvestyleall} )
+    {
+      $options{curvestyleall} .= " $options{styleall}";
+    }
+    else
+    {
+      $options{curvestyleall} = $options{styleall};
+    }
   }
-
   push @{$options{curvestyle}}, @{$options{style}};
-  delete $options{style};
 
-  if( $options{curvestyleall} && $options{with} )
-  {
-    print STDERR "--curvestyleall and --with are mutually exclusive. Please just use one.\n";
-    exit -1;
-  }
-  if( $options{with} )
-  {
-    $options{curvestyleall} = "with $options{with}";
-    delete $options{with};
-  }
-
-  # If we're plotting histograms, then set the default histogram options for
-  # each histogram curve
-  #
-  # Apply this to plain (non-cumulative) histograms
-  if( !$options{curvestyleall} && $options{histstyle} =~ /freq|fnorm/ )
-  {
-      for my $hist_curve(@{$options{histogram}})
-      {
-          # If we don't specify any options specifically for this histogram, use
-          # the defaults: filled boxes with borders
-          if( !any { $options{curvestyle}[$_*2] eq $hist_curve } 0..(@{$options{curvestyle}}/2 - 1) )
-          {
-              push @{$options{curvestyle}}, ($hist_curve, 'with boxes fill solid border lt -1');
-          }
-      }
-  }
 
   # --legend and --curvestyle options are conceptually hashes, but are parsed as
   # arrays in order to preserve the ordering. I parse both of these into hashes
@@ -223,9 +231,6 @@ sub interpretCommandline
   #  -1 for triggered replotting
   #  >0 for timed replotting
   #  undef if not streaming
-  #
-  #  Note that '0' is not allowed, so !$options{stream} will do the expected
-  #  thing
   if(defined $options{stream})
   {
     # if no streaming period is given, default to 1Hz.
@@ -255,6 +260,17 @@ sub interpretCommandline
     }
   }
 
+  if( $options{curvestyleall} && $options{with} )
+  {
+    print STDERR "--curvestyleall and --with are mutually exclusive. Please just use one.\n";
+    exit -1;
+  }
+  if( $options{with} )
+  {
+    $options{curvestyleall} = "with $options{with}";
+    $options{with} = '';
+  }
+
   if ($options{colormap})
   {
     # colormap styles all curves with palette. Seems like there should be a way to do this with a
@@ -346,9 +362,9 @@ sub interpretCommandline
   # --xlen implies an order to the data, so I force monotonicity
   $options{monotonic} = 1 if defined $options{xlen};
 
-  if( $options{histstyle} !~ /freq|cum|uniq|cnorm|fnorm/ )
+  if( $options{histstyle} !~ /freq|cum|uniq|cnorm/ )
   {
-    print STDERR "unknown histstyle. Allowed are 'freq...', 'fnorm...', 'cum...', 'uniq...', 'cnorm...'\n";
+    print STDERR "unknown histstyle. Allowed are 'freq...', 'cum...', 'uniq...', 'cnorm...'\n";
     exit -1;
   }
 
@@ -369,12 +385,16 @@ sub interpretCommandline
     # and strftime, and those are integer-only
     if( defined $options{xlen} )
     {
+        # warning do I need to make sure this is an integer anymore?
       if( $options{xlen} - int($options{xlen}) )
       {
         print STDERR "When streaming --xlen MUST be an integer. Rounding up to the nearest second\n";
         $options{xlen} = 1 + int($options{xlen});
       }
     }
+
+
+#    $strptime = DateTime::Format::Strptime->new( pattern => $options{timefmt} );
   }
 }
 
@@ -392,6 +412,17 @@ sub getGnuplotVersion
   return $gnuplotVersion;
 }
 
+sub plotUpdateThread
+{
+  while(! $streamingFinished)
+  {
+    usleep( $options{stream} * 1e6 );
+
+    # indicate that the timer was the replot source
+    $dataQueue->enqueue('replot timertick');
+  }
+}
+
 sub sendRangeCommand
 {
   my ($name, $min, $max) = @_;
@@ -416,75 +447,31 @@ sub makeDomainNumeric
 {
   my ($domain0) = @_;
 
-  if ( $options{timefmt} )
-  {
-    my $timepiece = Time::Piece->strptime( $domain0, $options{timefmt} )
-      or die "Couldn't parse time format. String '$domain0' doesn't fit format '$options{timefmt}'";
 
-    return $timepiece->epoch();
+
+  if( $options{timefmt})
+  {
+#      my $t = $strptime->parse_datetime($domain0);
+#      print STDERR "$domain0 $t\n";
   }
 
+
+
+
+#  return $strptime->parse_datetime($domain0) if $options{timefmt};
   return $domain0;
 }
 
-
-sub getNextLine
-{
-    while(1)
-    {
-        $this_replot_is_from_timer = undef;
-
-        # if we're not streaming, or we're doing triggered-only replotting, simply
-        # do a blocking read
-        return $stdin->getline()
-          if (! $options{stream} || $options{stream} < 0);
-
-
-        my $now = [gettimeofday];
-        my $time_remaining = $options{stream} - tv_interval($prev_timed_replot_time, $now);
-
-        if ( $time_remaining < 0 )
-        {
-            $prev_timed_replot_time = $now;
-            $this_replot_is_from_timer = 1;
-            return 'replot';
-        }
-
-        if ($selector->can_read($time_remaining))
-        {
-            return $stdin->getline();
-        }
-    }
-}
-
 sub mainThread
 {
     local *PIPE;
     my $dopersist = '';
 
-    if( getGnuplotVersion() >= 4.3 && # --persist not available before this
-
-        # --persist is needed for the "half-alive" state (see documentation for
-        # --exit). This state is only used with these options:
-        !$options{stream} && $options{exit})
+    if( !$options{stream} && getGnuplotVersion() >= 4.3)
     {
       $dopersist = '--persist';
     }
 
-    # We trap SIGINT to kill the data input, but keep the plot up. see
-    # documentation for --exit
-    if ($options{stream} && !$options{exit})
-    {
-        $SIG{INT} = sub
-        {
-            print STDERR "$0 received SIGINT. Send again to quit\n";
-            $SIG{INT} = undef;
-        };
-    }
-
-
-
-
     if(exists $options{dump})
     {
       *PIPE = *STDOUT;
@@ -510,11 +497,11 @@ sub mainThread
       }
 
       my %terminalOpts =
-      ( eps  => 'postscript noenhanced solid color enhanced eps',
-        ps   => 'postscript noenhanced solid color landscape 12',
-        pdf  => 'pdfcairo noenhanced solid color font ",12" size 11in,8.5in',
-        png  => 'png noenhanced size 1280,1024',
-        svg  => 'svg noenhanced');
+      ( eps  => 'postscript solid color enhanced eps',
+        ps   => 'postscript solid color landscape 10',
+        pdf  => 'pdfcairo solid color font ",10" size 11in,8.5in',
+        png  => 'png size 1280,1024',
+        svg  => 'svg');
 
       if( !defined $options{terminal} &&
            defined $outputfileType    &&
@@ -565,7 +552,7 @@ sub mainThread
       print(PIPE "set view equal xy\n");
     }
 
-    # For the specified values, set the legend entries to 'title "blah blah"'
+# For the specified values, set the legend entries to 'title "blah blah"'
     if(@{$options{legend}})
     {
       # @{$options{legend}} is a list where consecutive pairs are (curveID,
@@ -580,11 +567,13 @@ sub mainThread
       }
     }
 
-    # add the extra curve options
+# add the extra curve options
     if(@{$options{curvestyle}})
     {
       # @{$options{curvestyle}} is a list where consecutive pairs are (curveID,
-      # style).
+      # style). I use $options{curvestyle} here instead of
+      # $options{curvestyle_hash} because I create a new curve when I see a new
+      # one, and the hash is unordered, thus messing up the ordering
       my $n = scalar @{$options{curvestyle}}/2;
       foreach my $idx (0..$n-1)
       {
@@ -593,22 +582,22 @@ sub mainThread
       }
     }
 
-    # For the values requested to be printed on the y2 axis, set that
+# For the values requested to be printed on the y2 axis, set that
     addCurveOption($_, 'axes x1y2') foreach (@{$options{y2}});
 
-    # timefmt
+# timefmt
     if( $options{timefmt} )
     {
       print(PIPE "set timefmt '$options{timefmt}'\n");
       print(PIPE "set xdata time\n");
     }
 
-    # add the extra global options
+# add the extra global options
     print(PIPE "$_\n")       foreach (@{$options{extracmds}});
     print(PIPE "set $_\n")   foreach (@{$options{set}});
     print(PIPE "unset $_\n") foreach (@{$options{unset}});
 
-    # set up histograms
+# set up histograms
     $options{binwidth} ||= 1;   # if no binwidth given, set it to 1
     print PIPE
       "set boxwidth $options{binwidth}\n" .
@@ -616,6 +605,11 @@ sub mainThread
 
     setCurveAsHistogram( $_ ) foreach (@{$options{histogram}});
 
+# set all the axis ranges
+    # If a bound isn't given I want to set it to the empty string, so I can communicate it simply to
+    # gnuplot
+    print PIPE "set xtics\n";
+
     if(@{$options{y2}})
     {
       print PIPE "set ytics nomirror\n";
@@ -644,7 +638,8 @@ sub mainThread
     # number of seconds since the UNIX epoch.
     my $domain0_numeric;
 
-    while( defined ($_ = getNextLine()) )
+    # I should be using the // operator, but I'd like to be compatible with perl 5.8
+    while( $_ = (defined $dataQueue ? $dataQueue->dequeue() : <>))
     {
       next if /^#/o;
 
@@ -658,13 +653,16 @@ sub mainThread
 
         if(/^replot/o )
         {
-          replot( $domain0_numeric );
+          # /timertick/ determines if the timer was the source of the replot
+          replot( $domain0_numeric, /timertick/ );
           next;
         }
 
-        last if /^exit/o;
+        # /exit/ is handled in the data-reading thread
       }
 
+      if(! /^replot/o)
+      {
         # parse the incoming data lines. The format is
         # x id0 dat0 id1 dat1 ....
         # where idX is the ID of the curve that datX corresponds to
@@ -705,6 +703,17 @@ sub mainThread
               @domain = splice(@fields, 0, 2);
           }
 
+
+
+
+          # domain0_numeric is only used for xlen and monotonic, I think. And
+          # this is the only thing that requires strptime. Shouldn't bother with
+          # strptime otherwise
+
+
+
+
+
           if( $options{monotonic} )
           {
             if( defined $latestX && $domain0_numeric < $latestX )
@@ -721,8 +730,17 @@ sub mainThread
           }
         }
         else
+        {
+          # since $. is not meaningful in the plotting thread if we're using the data queue, we pass
+          # $. on the data queue in that case
+          if(defined $dataQueue)
+          {
+            $domain[0] = pop @fields;
+          }
+          else
           {
             $domain[0] = $.;
+          }
           $domain0_numeric = makeDomainNumeric( $domain[0] );
         }
 
@@ -753,9 +771,10 @@ sub mainThread
                       $domain0_numeric);
         }
       }
+    }
 
     # finished reading in all. Plot what we have
-    plotStoredData() unless $options{stream} && $options{exit};
+    plotStoredData() unless $options{stream};
 
     if ( defined $options{hardcopy})
     {
@@ -776,13 +795,6 @@ sub mainThread
       return;
     }
 
-    # data exhausted. If we're killed now, then we should peacefully die.
-    if($options{stream} && !$options{exit})
-    {
-        print STDERR "Input data exhausted\n";
-        $SIG{INT} = undef;
-    }
-
     # we persist gnuplot, so we shouldn't need this sleep. However, once
     # gnuplot exits, but the persistent window sticks around, you can no
     # longer interactively zoom the plot. So we still sleep
@@ -826,9 +838,7 @@ sub plotStoredData
   my @nonemptyCurves = grep { $_->{datastring} } @curves;
   my @extraopts = map {$_->{options}} @nonemptyCurves;
 
-  my $body = join('', map { "$_," } @{$options{equation}});
-  $body .= join(', ' , map({ "'-' $_" } @extraopts) );
-
+  my $body = join(', ' , map({ "'-' $_" } @extraopts) );
   if($options{'3d'}) { print PIPE "splot $body\n"; }
   else               { print PIPE  "plot $body\n"; }
 
@@ -857,6 +867,19 @@ sub updateCurveOptions
   { $title = $id; }
 
   my $titleoption = defined $title ? "title \"$title\"" : "notitle";
+
+  my ($curvestyleall);
+  if( defined $options{curvestyle_hash}{$id} )
+  {
+    # I have a curve-specific style set with --curvestyle. This style lives in
+    # $curve->{extraoptions}, and it overrides the global styles
+    $curvestyleall = '';
+  }
+  else
+  {
+    $curvestyleall = $options{curvestyleall};
+  }
+
   my $histoptions = $curve->{histoptions} || '';
 
   my $usingoptions = '';
@@ -877,7 +900,7 @@ sub updateCurveOptions
       $usingoptions = "using 1:" . join(':', @rest);
   }
 
-  $curve->{options} = "$histoptions $usingoptions $titleoption $curve->{extraoptions} $options{curvestyleall}";
+  $curve->{options} = "$histoptions $usingoptions $titleoption $curve->{extraoptions} $curvestyleall";
 }
 
 sub getCurve
@@ -969,7 +992,7 @@ sub replot
   # }
 
 
-  my ($domain0_numeric) = @_;
+  my ($domain0_numeric, $replot_is_from_timer) = @_;
 
   my $now = [gettimeofday];
 
@@ -979,7 +1002,7 @@ sub replot
       # if the last replot was timer-based, but this one isn't, force a replot.
       # This makes sure that a replot happens for a domain rollover shortly
       # after a timer replot
-      !$this_replot_is_from_timer && $last_replot_is_from_timer ||
+      !$replot_is_from_timer && $last_replot_is_from_timer ||
 
       # if enough time has elapsed since the last replot, it's ok to replot
       tv_interval ( $last_replot_time, $now ) > 0.8*$options{stream} )
@@ -995,7 +1018,7 @@ sub replot
       {
         # if we're using a timefmt, I need to convert my xmin range from
         # seconds-since-the-epoch BACK to the timefmt. Sheesh
-        ($xmin, $xmax) = map {Time::Piece->strptime( $_, '%s' )->strftime( $options{timefmt} ) } ($xmin, $xmax);
+        ($xmin, $xmax) = map {$strptime->parse_datetime($_)} ($xmin, $xmax);
       }
       sendRangeCommand( "xrange", $xmin, $xmax );
     }
@@ -1005,7 +1028,7 @@ sub replot
 
     # update replot state
     $last_replot_time          = $now;
-    $last_replot_is_from_timer = $this_replot_is_from_timer;
+    $last_replot_is_from_timer = $replot_is_from_timer;
   }
 }
 
@@ -1514,11 +1537,11 @@ passing something like
 
 C<--histogram curveID>
 
+
 Set up a this specific curve to plot a histogram. The bin width is given with
-the C<--binwidth> option (assumed 1.0 if omitted). If a drawing style is not
-specified for this curve (C<--curvestyle>) or all curves (C<--with>,
-C<--curvestyleall>) then the default histogram style is set: filled boxes with
-borders. This is what the user generally wants. This works with C<--domain>
+the C<--binwidth> option (assumed 1.0 if omitted). C<--histogram> does I<not>
+touch the drawing style. It is often desired to plot these with boxes, and this
+I<must> be explicitly requested by C<--with boxes>. This works with C<--domain>
 and/or C<--stream>, but in those cases the x-value is used I<only> to cull old
 data because of C<--xlen> or C<--monotonic>. I.e. the x-values are I<not> drawn
 in any way. Can be passed multiple times, or passed a comma- separated list
@@ -1534,14 +1557,12 @@ in the plot. Defaults to 1.0 if not given.
 
 C<--histstyle style>
 
-Normally, histograms are generated with the 'smooth frequency' gnuplot style.
-C<--histstyle> can be used to select different C<smooth> settings (see the
-gnuplot C<help smooth> page for more info). Allowed values are 'frequency' (the
-default), 'fnormal' (available in very recent gnuplots), 'unique', 'cumulative'
-and 'cnormal'. 'fnormal' is a normalized histogram. 'unique' indicates whether a
-bin has at least one item in it: instead of counting the items, it'll always
-report 0 or 1. 'cumulative' is the integral of the 'frequency' histogram.
-'cnormal' is like 'cumulative', but rescaled to end up at 1.0.
+Normally, histograms are generated with the 'smooth freq' gnuplot style.
+C<--histstyle> can be used to select different 'smooth' settings. Allowed are
+'unique', 'cumulative' and 'cnormal'. 'unique' indicates whether a bin has at
+least one item in it: instead of counting the items, it'll always report 0 or 1.
+'cumulative' is the integral of the "normal" histogram. 'cnormal' is like
+'cumulative', but rescaled to end up at 1.0.
 
 =item
 
@@ -1609,34 +1630,6 @@ times.
 
 =item
 
-C<--equation xxx>
-
-Gnuplot can plot both data and symbolic equations. C<feedgnuplot> generally
-plots data, but with this option can plot symbolic equations I<also>. This is
-generally intended to augment data plots, since for equation-only plots you
-don't need C<feedgnuplot>. C<--equation> can be passed multiple times for
-multiple equations. The given strings are passed to gnuplot directly without any
-thing added or removed, so styling and such should be applied in the string. A
-basic example:
-
- seq 100 | awk '{print $1/10, $1/100}' |
-   feedgnuplot --with 'lines lw 3' --domain --ymax 1
-               --equation 'sin(x)/x' --equation 'cos(x)/x with lines lw 4'
-
-Here I plot the incoming data (points along a line) with the given style (a line
-with thickness 3), I<and> I plot two damped sinusoids on the same plot. The
-sinusoids are not affected by C<feedgnuplot> styling, so their styles are set
-separately, as in this example. More complicated example:
-
- seq 360 | perl -nE '$th=$_/360 * 3.14*2; $c=cos($th); $s=sin($th); say "$c $s"' |
-   feedgnuplot --domain --square
-               --set parametric --set "trange [0:2*3.14]" --equation "sin(t),cos(t)"
-
-Here the data I generate is points along the unit circle. I plot these as
-points, and I I<also> plot a true circle as a parametric equation.
-
-=item
-
 C<--square>
 
 Plot data with aspect ratio 1. For 3D plots, this controls the aspect ratio for
@@ -1722,80 +1715,10 @@ is possible to send the output produced this way to gnuplot directly.
 
 C<--exit>
 
-This controls the details of what happens when the input data is exhausted, or
-when some part of the C<feedgnuplot> pipeline is killed. This option does
-different things depending on whether C<--stream> is active, so read this
-closely.
-
-With interactive gnuplot terminals (qt, x11, wxt), the plot windows live in a
-separate process from the main C<gnuplot> process. It is thus possible for the
-main C<gnuplot> process to exit, while leaving the plot windows up (a caveat is
-that such decapitated windows aren't interactive). To be clear, there are 3
-possible states:
-
-=over
-
-=item Alive: C<feedgnuplot>, C<gnuplot> alive, plot window process alive, no
-shell prompt (shell busy with C<feedgnuplot>)
-
-=item Half-alive: C<feedgnuplot>, C<gnuplot> dead, plot window process alive
-(but non-interactive), shell prompt available
-
-=item Dead: C<feedgnuplot>, C<gnuplot> dead, plot window process dead, shell
-prompt available
-
-=back
-
-The C<--exit> option controls the details of this behavior. The possibilities
-are:
-
-=over
-
-=item No C<--stream>, input pipe is exhausted (all data read in)
-
-=over
-
-=item default; no C<--exit>
-
-Alive. Need to Ctrl-C to get back into the shell
-
-=item C<--exit>
-
-Half-alive. Non-interactive prompt up, and the shell accepts new commands.
-Without C<--stream> the goal is to show a plot, so a Dead state is not useful
-here.
-
-=back
-
-=item C<--stream>, input pipe is exhausted (all data read in) or the
-C<feedgnuplot> process terminated
-
-=over
-
-=item default; no C<--exit>
-
-Alive. Need to Ctrl-C to get back into the shell
-
-=item C<--exit>
-
-Dead. No plot is shown, and the shell accepts new commands. With C<--stream> the
-goal is to show a plot as the data comes in, which we have been doing. Now that
-we're done, we can clean up everything.
-
-=back
-
-=back
-
-Note that one usually invokes C<feedgnuplot> as a part of a shell pipeline:
-
- $ write_data | feedgnuplot
-
-If the user terminates this pipeline with ^C, then I<all> the processes in the
-pipeline receive SIGINT. This normally kills C<feedgnuplot> and all its
-C<gnuplot> children, and we let this happen unless C<--stream> and no C<--exit>.
-If C<--stream> and no C<--exit>, then we ignore the first ^C. The data feeder
-dies, and we behave as if the input data was exhausted. A second ^C kills us
-also.
+Terminate the feedgnuplot process after passing data to gnuplot. The window will
+persist but will not be interactive. Without this option feedgnuplot keeps
+running and must be killed by the user. Note that this option works only with
+later versions of gnuplot and only with some gnuplot terminals.
 
 =item
 
@@ -1849,12 +1772,10 @@ in a Thinkpad.
  $ while true; do cat /proc/acpi/ibm/thermal | awk '{$1=""; print}' ; sleep 1; done |
    feedgnuplot --stream --xlen 100 --lines --autolegend --ymax 100 --ymin 20 --ylabel 'Temperature (deg C)'
 
-=head2 Plotting a histogram of file sizes in a directory, granular to 10MB
+=head2 Plotting a histogram of file sizes in a directory
 
  $ ls -l | awk '{print $5/1e6}' |
-   feedgnuplot --histogram 0
-     --binwidth 10
-     --ymin 0 --xlabel 'File size (MB)' --ylabel Frequency
+   feedgnuplot --histogram 0 --with boxes --ymin 0 --xlabel 'File size (MB)' --ylabel Frequency
 
 =head1 ACKNOWLEDGEMENT
 

completions/bash/feedgnuplot

@@ -20,7 +20,6 @@ complete -W               \
     --extracmds           \
     --set                 \
     --unset               \
-    --equation            \
     --geometry            \
     --hardcopy            \
     --help                \

completions/zsh/_feedgnuplot

@@ -32,7 +32,6 @@ _arguments -S
     '*--extracmds[Additional gnuplot commands]:command'                           \
     '*--set[Additional 'set' gnuplot commands]:set-option'                        \
     '*--unset[Additional 'unset' gnuplot commands]:unset-option'                  \
-    '*--equation[Raw symbolic equation]:equation'                                 \
     '--square[Plot data with square aspect ratio]'                                \
     '--square_xy[For 3D plots, set square aspect ratio for ONLY the x,y axes]'    \
     '--hardcopy[Plot to a file]:filename'                                         \

feedgnuplot.spec

@@ -1,58 +0,0 @@
-# Sample spec file for rpm-based systems. Debian-based systems already have this
-# packaged, so we do not ship those here
-
-Name:           feedgnuplot
-Version:        1.38
-Release:        1%{?dist}
-Summary:        Pipe-oriented frontend to Gnuplot
-BuildArch:      noarch
-
-License:        Artistic or GPL-1+
-URL:            https://www.github.com/dkogan/feedgnuplot/
-Source0:        https://www.github.com/dkogan/feedgnuplot/archive/v%{version}.tar.gz#/%{name}-%{version}.tar.gz
-
-BuildRequires:  /usr/bin/pod2html
-BuildRequires:  perl-String-ShellQuote
-BuildRequires:  perl-ExtUtils-MakeMaker
-BuildRequires:  perl
-BuildRequires:  gawk
-BuildRequires:  gnuplot
-BuildRequires:  perl-IPC-Run
-
-Requires:       gnuplot
-
-%description
-Flexible, command-line-oriented frontend to Gnuplot. Creates plots from data
-coming in on STDIN or given in a filename passed on the commandline. Various
-data representations are supported, as is hardcopy output and streaming display
-of live data.
-
-%prep
-%setup -q
-
-%build
-perl Makefile.PL INSTALLDIRS=vendor
-make
-pod2html --title=feedgnuplot bin/feedgnuplot > feedgnuplot.html
-
-%install
-make install DESTDIR=%{buildroot} PREFIX=/usr
-
-mkdir -p %{buildroot}%{_defaultdocdir}/%{name}
-cp Changes LICENSE feedgnuplot.html %{buildroot}%{_defaultdocdir}/%{name}
-
-mkdir -p %{buildroot}%{_datadir}/zsh/site-functions
-cp completions/zsh/* %{buildroot}%{_datadir}/zsh/site-functions
-
-mkdir -p %{buildroot}%{_datadir}/bash-completion/completions
-cp completions/bash/* %{buildroot}%{_datadir}/bash-completion/completions
-
-rm -rf %{buildroot}/usr/lib64
-
-
-%files
-%{_bindir}/*
-%{_datadir}/zsh/*
-%{_datadir}/bash-completion/*
-%doc %{_defaultdocdir}/%{name}/*
-%doc %{_mandir}