From 5295026aece6450fec687fb31eecfd27b160875b Mon Sep 17 00:00:00 2001
From: Erich Eckner <git@eckner.net>
Date: Fri, 21 Dec 2018 10:46:47 +0100
Subject: initial commit

---
 hdd-tree | 90 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 90 insertions(+)
 create mode 100755 hdd-tree

diff --git a/hdd-tree b/hdd-tree
new file mode 100755
index 0000000..78dda0a
--- /dev/null
+++ b/hdd-tree
@@ -0,0 +1,90 @@
+#!/bin/bash
+
+drives=$(
+  find /dev -maxdepth 1 -regex '.*/sd[a-z]+'
+)
+
+raids=$(
+  sed '
+    1d
+    s/^\(\S\+\) \+: \+\S\+ \+\(\S\+\) \+/\1 \2 /
+    t
+    d
+  ' /proc/mdstat \
+    | sed '
+      s/\[\S\+]//g
+      s/^\(\S\+\) \+\(\S\+\) \+\(\S\+\) \+/\1 \2 \3\n\1 \2 /
+      P
+      D
+    ' \
+    | sed '
+      s,^\(\S\+ \S\+ \)\(\S\+\)$,/dev/\1/dev/\2,
+    '
+)
+
+crypt_devices=$(
+  find /dev -maxdepth 1 -name 'dm-*' -exec cryptsetup status {} \; \
+    | grep '^\S\|^\s*device:' \
+    | sed '
+      /^\S\+ / {
+        N
+        s,^\(\S\+\) .*\n\s*device:\s*\(\S\+\)$,\1 \2,
+        t
+      }
+      d
+    '
+)
+
+drives=$(
+  printf '%s\n' "${drives}"
+  printf '%s\n' "${raids}" \
+    | cut -d' ' -f1 \
+    | sort -u
+)
+
+partitions=$(
+  find /dev -maxdepth 1 \
+    | grep -F "${drives}" \
+    | grep -vxF "${drives}"
+)
+
+mounts=$(
+  mount \
+    | grep -wF "$(printf '%s\n' "${partitions}" "${drives}")" \
+    | awk '{print $3 " " $1}'
+)
+
+printf 'digraph {\n'
+printf 'rankdir=LR;\n'
+printf '%s\n' "${drives}" \
+  | sed '
+    s/^.*$/"\0" [shape="trapezium"];/
+  '
+printf '%s\n' "${raids}" \
+  | cut -d' ' -f1,2 \
+  | sort -u \
+  | sed '
+    s/^\(\S\+\) \(\S\+\)$/"\1" [label="\1\\n(\2)", shape="box"];/
+  '
+printf '%s\n' "${raids}" \
+  | cut -d' ' -f1,3 \
+  | sed '
+    s/^\(\S\+\) \(\S\+\)$/"\1" -> "\2";/
+  '
+printf '%s\n' "${crypt_devices}" \
+  | sed '
+    s/^\(\S\+\) \(\S\+\)$/"\1" -> "\2";/
+  '
+printf '%s\n' "${crypt_devices}" \
+  | sed '
+    s/^\(\S\+\) \S\+$/"\1" [shape="hexagon"];/
+  '
+printf '%s\n' "${partitions}" \
+  | sed '
+    s/^\(.*[^0-9]\)[0-9]\+$/"\0" -> "\1";/
+  '
+printf '%s\n' "${mounts}" \
+  | sed '
+    s/^\(\S\+\) \(\S\+\)$/"\1" -> "\2";/
+  '
+printf '}\n'
-- 
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