added -B and -D options, with description

mhssh

@@ -23,10 +23,13 @@ red=$(tput setaf 1)
 grn=$(tput setaf 2)
 raz=$(tput sgr0)
 
+bgnd=''
+dtch=''
+
 usage() {
 	echo "Run a single command on multiple hosts"
-	echo "Usage : $0 [-h|--help] [-n|--no-color] CMD ..."
-	echo -e "\n\t-h --help\tprint this help\n\t-n --no-color\tdisable colors\n\n"
+	echo "Usage : $0 [-h|--help] [-n|--no-color] [-B|--background] [-D|--detach] CMD ..."
+	echo -e "\n\t-h --help\tprint this help\n\t-n --no-color\tdisable colors\n\t-B --background\tput the task in background\n\t-D --detach\tuse dtach to put the task in background\n\n"
 	echo "Host list configured to be found in '$hosts'"
 }
 
@@ -50,6 +53,14 @@ case "$1" in
 		grn=''
 		raz=''
 	;;
+	-B|--background)
+		shift
+		bgnd='on'
+	;;
+	-D|--detach)
+		shift
+		dtch='on'
+	;;
 esac
 
 if [ ! -f "$hosts" ]
@@ -67,6 +78,14 @@ do
 	stdout=$(echo -ne "$grn$(printf "%20s" "$host") : $raz")
 	stderr=$(echo -ne "$red$(printf "%20s" "$host") : $raz")
 	{
-		ssh $host "$@;exit" 2>&3 | sed -e "s/^/$stdout/" 1>&2
+		if [ -n "$bgnd" ];
+		then
+			ssh $host "nohup $@ > /dev/null < /dev/null & PID=\$!; disown \$PID; echo \$PID; exit" 2>&3 | sed -e "s/^/$stdout/" 1>&2;
+		elif [ -n "$dtch" ];
+		then
+			ssh $host "TMPFILE=$(mktemp -u); dtach -n \$TMPFILE $@; echo \$TMPFILE; exit" 2>&3 | sed -e "s/^/dtach session : $stdout/" 1>&2 ;
+		else
+			ssh $host "$@;exit" 2>&3 | sed -e "s/^/$stdout/" 1>&2 ;
+		fi
 	} <&0 3>&1 | sed -e "s/^/$stderr/"
 done