small fixes

bin/epm-requires

@@ -79,6 +79,7 @@ epm_requires_files()
     local pkg_files="$*"
     [ -n "$pkg_files" ] || return
 
+    # TODO: handle separately
     local PKGTYPE="$(get_package_type $pkg_files)"
 
     case "$PKGTYPE" in

bin/epm-sh-functions

@@ -791,7 +791,7 @@ get_package_type()
             return
             ;;
         *)
-            if file "$1" | grep -q " ELF " ; then
+            if [ -r "$1" ] && file "$1" | grep -q " ELF " ; then
                 echo "ELF"
                 return
             fi