- Print usage if there are no arguments and stdin is terminal

- Fix grammar in pkg-descr

archivers/rpm2cpio/Makefile

@@ -3,6 +3,7 @@
 
 PORTNAME=	rpm2cpio
 PORTVERSION=	1.4
+PORTREVISION=	1
 CATEGORIES=	archivers
 MASTER_SITES=	# none
 DISTFILES=	# none

archivers/rpm2cpio/files/rpm2cpio

@@ -4,7 +4,7 @@
 
 PATH=/bin:/usr/bin
 
-if [ $# -eq 0 ]; then
+if [ $# -eq 0 -a ! -t 0 ]; then
 	f=/dev/stdin
 elif [ $# -eq 1 ]; then
 	f=$1

archivers/rpm2cpio/pkg-descr

@@ -1,7 +1,7 @@
-Convert .rpm files to cpio format
+Convert .rpm files to cpio format.
 
 Why does the world need another rpm2cpio?  because the existing one
 won't build unless you have half a ton of things that aren't really
 required for it, since it uses the same library used to extract RPM's.
 
-This version just a tiny wrapper around bsdtar.
+This version is just a tiny wrapper around bsdtar.