epm-sh-functions: add sudo_allowed

bin/epm-sh-functions

@@ -360,13 +360,13 @@ set_sudo()
 	# if input is a console
 	if inputisatty && isatty && isatty2 ; then
 		if ! $SUDO_CMD -l >/dev/null ; then
-			[ "$nofail" = "nofail" ] || SUDO="fatal 'Can't use sudo (only without password sudo is supported in non interactive using). Please run epm under root.'"
+			[ "$nofail" = "nofail" ] || SUDO="fatal 'Can't use sudo (only passwordless sudo is supported in non interactive using). Please run epm under root.'"
 			return "$SUDO_TESTED"
 		fi
 	else
 		# use sudo if one is tuned and tuned without password
 		if ! $SUDO_CMD -l -n >/dev/null 2>/dev/null ; then
-			[ "$nofail" = "nofail" ] || SUDO="fatal 'Can't use sudo (only without password sudo is supported). Please run epm under root or check http://altlinux.org/sudo.'"
+			[ "$nofail" = "nofail" ] || SUDO="fatal 'Can't use sudo (only passwordless sudo is supported). Please run epm under root or check http://altlinux.org/sudo.'"
 			return "$SUDO_TESTED"
 		fi
 	fi
@@ -378,6 +378,12 @@ set_sudo()
 
 }
 
+# return TRUE if we can run privileged command
+sudo_allowed()
+{
+	set_sudo nofail
+}
+
 # wait for n seconds (if possible) during executing command
 # args: seconds command
 withtimeout()