Merge 216da0b7 (automated)

1 files changed, 46 insertions, 0 deletions

diff --git a/pkg/syserr/host_linux.go b/pkg/syserr/host_linux.go
new file mode 100644
index 000000000..fc6ef60a1
--- /dev/null
+++ b/pkg/syserr/host_linux.go
@@ -0,0 +1,46 @@
+// Copyright 2018 The gVisor 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.
+
+// +build linux
+
+package syserr
+
+import (
+	"fmt"
+	"syscall"
+)
+
+const maxErrno = 134
+
+type linuxHostTranslation struct {
+	err *Error
+	ok  bool
+}
+
+var linuxHostTranslations [maxErrno]linuxHostTranslation
+
+// FromHost translates a syscall.Errno to a corresponding Error value.
+func FromHost(err syscall.Errno) *Error {
+	if err < 0 || int(err) >= len(linuxHostTranslations) || !linuxHostTranslations[err].ok {
+		panic(fmt.Sprintf("unknown host errno %q (%d)", err.Error(), err))
+	}
+	return linuxHostTranslations[err].err
+}
+
+func addLinuxHostTranslation(host syscall.Errno, trans *Error) {
+	if linuxHostTranslations[host].ok {
+		panic(fmt.Sprintf("duplicate translation for host errno %q (%d)", host.Error(), host))
+	}
+	linuxHostTranslations[host] = linuxHostTranslation{err: trans, ok: true}
+}