prefer SIGINFO for statistics if available

[barcat.git] / barcat

diff --git a/barcat b/barcat
index 1b780e618d23620456c984ad6e61b36bd2438c78..de3f6f8459721ae78c734401961607eaef4c4e20 100755 (executable)
--- a/barcat
+++ b/barcat
@@ -43,6 +43,9 @@ GetOptions(\%opt,
                );
        },
        'markers|m=s',
                );
        },
        'markers|m=s',

+       'graph-format=s' => sub {
+               $opt{'graph-format'} = substr $_[1], 0, 1;
+       },

        'spark:s' => sub {
                $opt{spark} = [split //, $_[1] || '⎽▁▂▃▄▅▆▇█'];
        },
        'spark:s' => sub {
                $opt{spark} = [split //, $_[1] || '⎽▁▂▃▄▅▆▇█'];
        },


@@ -75,6 +78,7 @@ GetOptions(\%opt,
 
 $opt{width} ||= $ENV{COLUMNS} || 80;
 $opt{color} //= -t *STDOUT;  # enable on tty
 
 $opt{width} ||= $ENV{COLUMNS} || 80;
 $opt{color} //= -t *STDOUT;  # enable on tty

+$opt{'graph-format'} //= '-';

 $opt{trim}   *= $opt{width} / 100 if $opt{trimpct};
 $opt{units}   = [split //, ' kMGTPEZYyzafpnμm'] if $opt{'human-readable'};
 $opt{anchor} //= qr/\A/;
 $opt{trim}   *= $opt{width} / 100 if $opt{trimpct};
 $opt{units}   = [split //, ' kMGTPEZYyzafpnμm'] if $opt{'human-readable'};
 $opt{anchor} //= qr/\A/;


@@ -83,6 +87,7 @@ $opt{'value-length'} = 1 if $opt{unmodified};
 
 my (@lines, @values, @order);
 
 
 my (@lines, @values, @order);
 

+$SIG{$_} = \&show_stat for exists $SIG{INFO} ? 'INFO' : 'QUIT';

 $SIG{ALRM} = sub {
        show_lines();
        alarm $opt{interval} if defined $opt{interval} and $opt{interval} > 0;
 $SIG{ALRM} = sub {
        show_lines();
        alarm $opt{interval} if defined $opt{interval} and $opt{interval} > 0;


@@ -100,6 +105,7 @@ if (defined $opt{interval}) {
 
 $SIG{INT} = sub {
        $SIG{INT} = 'DEFAULT';  # reset for subsequent attempts
 
 $SIG{INT} = sub {
        $SIG{INT} = 'DEFAULT';  # reset for subsequent attempts

+       exit if !$.;

        'IGNORE' # continue after assumed eof
 };
 
        'IGNORE' # continue after assumed eof
 };
 


@@ -204,7 +210,7 @@ while ($nr <= $#lines) {
        }
        my $line = $lines[$nr] =~ s/\n/$val/r;
        printf '%-*s', $len + length($val), $line;
        }
        my $line = $lines[$nr] =~ s/\n/$val/r;
        printf '%-*s', $len + length($val), $line;

-       print $barmark[$_] // '-' for 1 .. $size && (($values[$nr] || 0) - $minval) * $size + .5;
+       print $barmark[$_] // $opt{'graph-format'} for 1 .. $size && (($values[$nr] || 0) - $minval) * $size + .5;

        say '';
 }
 continue {
        say '';
 }
 continue {


@@ -215,7 +221,7 @@ say '' if $opt{spark};
 }
 show_lines();
 
 }
 show_lines();
 

-if ($opt{stat}) {
+sub show_stat {

        if ($opt{hidemin} or $opt{hidemax}) {
                $opt{hidemin} ||= 1;
                $opt{hidemax} ||= @lines;
        if ($opt{hidemin} or $opt{hidemax}) {
                $opt{hidemin} ||= 1;
                $opt{hidemax} ||= @lines;


@@ -233,6 +239,7 @@ if ($opt{stat}) {
        }
        say '';
 }
        }
        say '';
 }

+show_stat() if $opt{stat};

 
 __END__
 =encoding utf8
 
 __END__
 =encoding utf8


@@ -307,6 +314,11 @@ Stop output after a number of lines.
 All input is still counted and analyzed for statistics,
 but disregarded for padding and bar size.
 
 All input is still counted and analyzed for statistics,
 but disregarded for padding and bar size.
 

+=item --graph-format=<character>
+
+Glyph to repeat for the graph line.
+Defaults to a dash C<->.
+

 =item -m, --markers=
 
 Statistical positions to indicate on bars.
 =item -m, --markers=
 
 Statistical positions to indicate on bars.