[VOL-4291] Rw-core updates for gRPC migration
Change-Id: I8d5a554409115b29318089671ca4e1ab3fa98810
diff --git a/vendor/github.com/coreos/etcd/pkg/runtime/fds_linux.go b/vendor/github.com/coreos/etcd/pkg/runtime/fds_linux.go
new file mode 100644
index 0000000..4906d67
--- /dev/null
+++ b/vendor/github.com/coreos/etcd/pkg/runtime/fds_linux.go
@@ -0,0 +1,48 @@
+// Copyright 2015 The etcd Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package runtime implements utility functions for runtime systems.
+package runtime
+
+import (
+ "os"
+ "syscall"
+)
+
+func FDLimit() (uint64, error) {
+ var rlimit syscall.Rlimit
+ if err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, &rlimit); err != nil {
+ return 0, err
+ }
+ return rlimit.Cur, nil
+}
+
+func FDUsage() (uint64, error) {
+ return countFiles("/proc/self/fd")
+}
+
+// countFiles reads the directory named by dirname and returns the count.
+// This is same as stdlib "io/ioutil.ReadDir" but without sorting.
+func countFiles(dirname string) (uint64, error) {
+ f, err := os.Open(dirname)
+ if err != nil {
+ return 0, err
+ }
+ list, err := f.Readdir(-1)
+ f.Close()
+ if err != nil {
+ return 0, err
+ }
+ return uint64(len(list)), nil
+}