separate check input and output

bin/epm

@@ -314,7 +314,7 @@ for opt in "$@" ; do
 done
 
 # if input is not console, get pkg from it too
-if ! isatty ; then
+if ! inputisatty ; then
     for opt in $(cat) ; do
         check_filenames $opt
     done

bin/epm-sh-functions

@@ -19,10 +19,15 @@
 
 # copied from /etc/init.d/outformat (ALT Linux)
 
+inputisatty()
+{
+	# check stdin
+	tty -s
+}
+
 isatty()
 {
 	# check stdout
-	# CHECKME: use tty -s?
 	test -t 1
 }