obmcutil: Rewrite in sh and move to phosphor-state-manager

Due to space, security, and performance concerns obmcutil is
being converted to shell script. Have implemented the basic
state interface queries (bmc, chassis, and host).

Moved to phosphor-state-manager repo as this tool mostly deals
with setting and querying state interfaces.

Change-Id: Ib42da06a45e386dd1cc150ac85b638bdf87bdb9d
Signed-off-by: Anthony Wilson <wilsonan@us.ibm.com>
diff --git a/obmcutil b/obmcutil
new file mode 100644
index 0000000..65ca763
--- /dev/null
+++ b/obmcutil
@@ -0,0 +1,61 @@
+#!/bin/sh -e
+
+set -euo pipefail
+
+USAGE="Usage: obmcutil {bmcstate,chassisstate,hoststate,state,status}"
+
+INTERFACE_ROOT=xyz.openbmc_project
+STATE_INTERFACE=$INTERFACE_ROOT.State
+
+OBJECT_ROOT=/xyz/openbmc_project
+STATE_OBJECT=$OBJECT_ROOT/state
+
+get_property ()
+{
+    busctl get-property "$@"
+}
+
+state_query ()
+{
+    local state=$(get_property "$@" | cut -d '"' -f2)
+    printf "%-20s: %s\n" $4 $state
+}
+
+handle_cmd ()
+{
+    case "$1" in
+        bmcstate)
+            OBJECT=$STATE_OBJECT/bmc0
+            SERVICE=$(mapper get-service $OBJECT)
+            INTERFACE=$STATE_INTERFACE.BMC
+            PROPERTY=CurrentBMCState
+            state_query $SERVICE $OBJECT $INTERFACE $PROPERTY
+            ;;
+        chassisstate)
+            OBJECT=$STATE_OBJECT/chassis0
+            SERVICE=$(mapper get-service $OBJECT)
+            INTERFACE=$STATE_INTERFACE.Chassis
+            PROPERTY=CurrentPowerState
+            state_query $SERVICE $OBJECT $INTERFACE $PROPERTY
+            ;;
+        hoststate)
+            OBJECT=$STATE_OBJECT/host0
+            SERVICE=$(mapper get-service $OBJECT)
+            INTERFACE=$STATE_INTERFACE.Host
+            PROPERTY=CurrentHostState
+            state_query $SERVICE $OBJECT $INTERFACE $PROPERTY
+            ;;
+        state|status)
+            for query in bmcstate chassisstate hoststate
+            do
+                handle_cmd $query
+            done
+            ;;
+        *)
+            echo "ERROR: Invalid Choice: '$1'"
+            echo "$USAGE"
+            ;;
+    esac
+}
+
+handle_cmd $1