1 files changed, 61 insertions, 0 deletions
diff --git a/src/pkg/os/error_plan9.go b/src/pkg/os/error_plan9.go
new file mode 100644
index 000000000..cacfc150c
--- /dev/null
+++ b/src/pkg/os/error_plan9.go
@@ -0,0 +1,61 @@
+// Copyright 2011 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package os
+
+import syscall "syscall"
+
+// SyscallError records an error from a specific system call.
+type SyscallError struct {
+	Syscall string
+	Err     string
+}
+
+func (e *SyscallError) String() string { return e.Syscall + ": " + e.Err }
+
+// Note: If the name of the function NewSyscallError changes,
+// pkg/go/doc/doc.go should be adjusted since it hardwires
+// this name in a heuristic.
+
+// NewSyscallError returns, as an Error, a new SyscallError
+// with the given system call name and error details.
+// As a convenience, if err is nil, NewSyscallError returns nil.
+func NewSyscallError(syscall string, err syscall.Error) Error {
+	if err == nil {
+		return nil
+	}
+	return &SyscallError{syscall, err.String()}
+}
+
+var (
+	Eshortstat = NewError("stat buffer too small")
+	Ebadstat   = NewError("malformed stat buffer")
+	Ebadfd     = NewError("fd out of range or not open")
+	Ebadarg    = NewError("bad arg in system call")
+	Enotdir    = NewError("not a directory")
+	Enonexist  = NewError("file does not exist")
+	Eexist     = NewError("file already exists")
+	Eio        = NewError("i/o error")
+	Eperm      = NewError("permission denied")
+
+	EINVAL  = Ebadarg
+	ENOTDIR = Enotdir
+	ENOENT  = Enonexist
+	EEXIST  = Eexist
+	EIO     = Eio
+	EACCES  = Eperm
+	EPERM   = Eperm
+	EISDIR  = syscall.EISDIR
+
+	ENAMETOOLONG = NewError("file name too long")
+	ERANGE       = NewError("math result not representable")
+	EPIPE        = NewError("Broken Pipe")
+	EPLAN9       = NewError("not supported by plan 9")
+)
+
+func iserror(err syscall.Error) bool {
+	return err != nil
+}
+
+func Errno(e syscall.Error) syscall.Error { return e }