Add scripts graph_free and graph_used

scripts/graph_free

@@ -0,0 +1,22 @@
+#!/usr/bin/perl 
+use v5.24;
+use warnings;
+
+open my $tsfh, '>', "graph_free.tsv";
+for my $fn (glob("/var/log/simba/ca.*")) {
+    my $fh;
+    if ($fn =~ /\.gz$/) {
+        open($fh, '-|', "zcat", $fn);
+    } else {
+        open ($fh, '<', $fn);
+    }
+    while (<$fh>) {
+        if (m{(....-..-..T..:..:..[-+]....) .*: found base /backup/(.*) \(est. (\d+) bytes\)}) {
+            say $tsfh "$1\t$2\t$3"
+        }
+    }
+}
+close $tsfh;
+
+open STDOUT, '>', "graph_free.png";
+system "tsplotv", "--style", "points", "--legend-position", "below", "--yrange", "0:*", "graph_free.tsv";

scripts/graph_used

@@ -0,0 +1,20 @@
+#!/usr/bin/perl 
+use v5.24;
+use warnings;
+
+open my $tsfh, '>', "graph_used.tsv";
+for my $fn (glob("/var/log/simba/ca.*")) {
+    open (my $fh, '<', $fn);
+    my %free;
+    while (<$fh>) {
+        if (m{(....-..-..T..:..:..[-+]....) .*: considering base /backup/(.*) \(est. (\d+) bytes\)}) {
+            $free{$2} = $3;
+        } elsif (m{(....-..-..T..:..:..[-+]....) .*: using base /backup/(.*)}) {
+            say $tsfh "$1\t$2\t$free{$2}"
+        }
+    }
+}
+close $tsfh;
+
+open STDOUT, '>', "graph_used.png";
+system "tsplotv", "--style", "points", "--legend-position", "below", "graph_used.tsv";