From 3714031448790d12cd03b633c6fbca3ad1423631 Mon Sep 17 00:00:00 2001
From: pgen <p.gen.progs@gmail.com>
Date: Wed, 2 Mar 2016 23:32:46 +0100
Subject: Add an example in the form of scripts providing a simple menuing
 system

---
 examples/lvm_menu/README         |   7 ++++
 examples/lvm_menu/lvm_menu.sh    |  49 ++++++++++++++++++++++
 examples/lvm_menu/menu.sh        |  85 +++++++++++++++++++++++++++++++++++++++
 examples/lvm_menu/screenshot.png | Bin 0 -> 6069 bytes
 4 files changed, 141 insertions(+)
 create mode 100644 examples/lvm_menu/README
 create mode 100755 examples/lvm_menu/lvm_menu.sh
 create mode 100755 examples/lvm_menu/menu.sh
 create mode 100644 examples/lvm_menu/screenshot.png

(limited to 'examples')

diff --git a/examples/lvm_menu/README b/examples/lvm_menu/README
new file mode 100644
index 0000000..a88aec9
--- /dev/null
+++ b/examples/lvm_menu/README
@@ -0,0 +1,7 @@
+This is an example of bash tool to build a customized LVM management menu.
+
+menu.sh     is used to create a generic menu with smenu
+lvm_menu.sh uses menu.sh to create a specialized menu to manage LVM objects
+
+Running lvm_menu.sh -i should display something similar to the screenshot
+provided. In this screenshot the user is about to delete a LV.
diff --git a/examples/lvm_menu/lvm_menu.sh b/examples/lvm_menu/lvm_menu.sh
new file mode 100755
index 0000000..cad4db0
--- /dev/null
+++ b/examples/lvm_menu/lvm_menu.sh
@@ -0,0 +1,49 @@
+#!/bin/bash
+
+MENU+="\
+'Create' 'Delete' 'Extend' 'Shrink'
+'VGC VG' 'VGD VG' 'VGE VG' 'VGS VG'
+'LVC LV' 'LVD LV' 'LVE LV' 'LVS LV'
+'PVC PV' 'PVD PV'
+#
+'L List'
+#
+'Quit Exit menu'"
+
+trap "exit 1" INT
+
+while true
+do
+   clear
+   echo "Executing ${0##*/}"
+   echo
+
+   MESSAGE="LVM management"
+   read REP <<< $(echo "$MENU" | ./menu.sh -i "$MESSAGE" "-Rd1")
+
+   case $REP in
+     ABORT) exit 1         ;;
+     QUIT)  exit 0         ;;
+
+     L)     echo List      ;;
+
+     VGC)   echo VG create ;;
+     VGD)   echo VG delete ;;
+     VGE)   echo VG expand ;;
+     VGS)   echo VG shrink ;;
+
+     LVC)   echo LV create ;;
+     LVD)   echo LV delete ;;
+     LVE)   echo LV expand ;;
+     LVS)   echo LV list   ;;
+
+     PVC)   echo PV create ;;
+     PVD)   echo PV delete ;;
+   esac
+
+   echo
+   echo -n "Press <Enter> to continue"
+   read
+done
+
+exit 0
diff --git a/examples/lvm_menu/menu.sh b/examples/lvm_menu/menu.sh
new file mode 100755
index 0000000..cf1bafe
--- /dev/null
+++ b/examples/lvm_menu/menu.sh
@@ -0,0 +1,85 @@
+#!/bin/bash
+
+# ################################################################ #
+# Frontend to smenu to display a nice menu                         #
+#                                                                  #
+# FLAGS: -i    (optional) add some help in the title               #
+#                                                                  #
+# ARGS:  $1    (required) must contain a string which will become  #
+#                         the menu title                           #
+#        $2... (optional) adds more options passed to smenu        #
+#                                                                  #
+# RC:    0 OK                                                      #
+#        1 KO                                                      #
+# ################################################################ #
+
+# ============== #
+# usage function #
+# ============== #
+function usage
+{
+  echo "menu.sh [-i] title [smenu options]"
+  exit 1
+}
+
+declare integer INFO=0
+
+# Option processing
+# """""""""""""""""
+while getopts ih OPT 2>/dev/null
+do
+  case ${OPT} in
+    i)   INFO=1
+         ;;
+
+    h|*) usage
+         exit 1
+         ;;
+  esac
+done
+shift $((${OPTIND} - 1))
+
+# Menu title generation
+# """""""""""""""""""""
+if [[ $1 ]]; then
+  MESSAGE="$1"
+  (( INFO )) && MESSAGE+=$'\n'"[ q=quit arrows=move ?=help ]"
+  TITLE="-m"
+  TITLE+=$MESSAGE$'\n'
+  shift
+else
+  TITLE="-m "
+fi
+
+# Menu display
+# """"""""""""
+REP=$(../../smenu "$TITLE"                 \
+            -s /"* Exit"                   \
+            -q -d -M -n 30 -c -w           \
+            -e '^#' -E '/(^#)+(.*)$/ \2/v' \
+            -1 '\\* Exit' 7/4,b            \
+            -I '/([^ ]+) (.*)/* \2/v'      \
+            $1                             \
+      || echo Abort)
+
+read KEY DUMMY <<< $REP
+
+# Action processing
+# """""""""""""""""
+case $KEY in
+  Abort)
+    echo ABORT
+    ;;
+
+  ""|Quit)
+    echo QUIT
+    ;;
+
+  *)
+    echo $KEY
+    ;;
+esac
+
+# Normal exit
+# """""""""""
+exit 0
diff --git a/examples/lvm_menu/screenshot.png b/examples/lvm_menu/screenshot.png
new file mode 100644
index 0000000..5d98376
Binary files /dev/null and b/examples/lvm_menu/screenshot.png differ
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