unbash awesome-client

-e and -p options for read are bashizm, so awesome-client don't work
if /bin/sh is something other than bash (for example it fails with
pdksh which is default shell on PLD Linux).

The simplest sollution is 's,#!/bin/sh,#!/bin/bash,'. But I believe
that it is better to patch script so it will work with any POSIX
compliant shell.

Attached patch checks if shell is bash. If no it disables use of
non-standard read options.

I've also changed `` to $(), as backquotes are obsolete and
shouldn't be used.

Signed-off-by: Julien Danjou <julien@danjou.info>

utils/awesome-client

@@ -1,7 +1,8 @@
 #!/bin/sh
 
 # rlwrap provides readline to stuff which doesn't know readline by itself
-RLWRAP=`which rlwrap 2>/dev/null`
+RLWRAP=$(which rlwrap 2>/dev/null)
+READ_OPTIONS="-r"
 
 if [ "$RLWRAP" != "" ]
 then
@@ -10,7 +11,15 @@ then
         A_RERUN="no" exec $RLWRAP $0
     fi
 else
-    USE_READLINE="-e"
+    if [ "$BASH" ]
+    then
+        READ_PARAMETERS=" -e"
+    fi
+fi
+
+if [ $BASH ]
+then
+    READ_OPTIONS="$READ_OPTIONS -p awesome# "
 fi
 
 DBUS_SEND=dbus-send
@@ -32,7 +41,7 @@ a_dbus_send()
         $DBUS_METHOD string:"$1" | tail -n +2
 }
 
-while read ${USE_READLINE} -r -p "awesome# " line
+while read ${USE_READLINE} ${READ_OPTIONS} line
 do
     a_dbus_send "$line"
 done