commit bash-20130301 snapshot

examples/scripts/nohup.bash

@@ -0,0 +1,51 @@
+#
+# BASH VERSION OF nohup COMMAND
+#
+ctype()
+{
+	path=$(builtin type -p $cmd | sed 1q)
+	if [ -n "$path" ]; then
+		echo "$path"
+		return 0
+	else
+		case "$cmd" in
+		*/*)	[ -x "$cmd ] && { echo "$cmd" ; return 0; } ;;
+		  *)	case "$(builtin type -t $cmd)" in
+			"")	return 1;;
+			*)	echo "$cmd" ; return 0;;
+			esac ;;
+		esac
+	fi
+	return 1
+}
+
+trap '' HUP		# ignore hangup
+command=$(ctype "$1")
+oldmask=$(umask)
+umask u=rw,og=		# default mode for nohup.out
+exec 0< /dev/null	# disconnect input
+if [ -t 1 ]; then	# redirect output if necessary
+	if [ -w . ]; then
+		echo 'Sending output to nohup.out'
+		exec >> nohup.out
+	else	echo "Sending output to $HOME/nohup.out"
+		exec >> $HOME/nohup.out
+	fi
+fi
+
+umask "$oldmask"
+
+# direct unit 2 to a file
+if [ -t 2 ]; then
+	exec 2>&1
+fi
+
+# run the command
+case $command in
+*/*)	exec "$@"
+	;;
+time)	eval "$@"
+	;;
+*)	"$@"
+	;;
+esac