From 8184ec4b7048a10e312d9cbe2cc7e77df1600278 Mon Sep 17 00:00:00 2001
From: Nick Craig-Wood <nick@craig-wood.com>
Date: Tue, 31 Oct 2017 15:33:08 +0000
Subject: [PATCH] vfs: add EPERM to errors

---
 cmd/cmount/fs.go | 2 ++
 cmd/mount/fs.go  | 4 +++-
 vfs/dir.go       | 2 +-
 vfs/errors.go    | 1 +
 vfs/file.go      | 4 ++--
 5 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/cmd/cmount/fs.go b/cmd/cmount/fs.go
index 59d8bcd2b..bcf1c6e11 100644
--- a/cmd/cmount/fs.go
+++ b/cmd/cmount/fs.go
@@ -640,6 +640,8 @@ func translateError(err error) (errc int) {
 		return -fuse.EROFS
 	case vfs.ENOSYS:
 		return -fuse.ENOSYS
+	case vfs.EPERM:
+		return -fuse.EPERM
 	}
 	fs.Errorf(nil, "IO error: %v", err)
 	return -fuse.EIO
diff --git a/cmd/mount/fs.go b/cmd/mount/fs.go
index 99bb55b5a..157e9f09a 100644
--- a/cmd/mount/fs.go
+++ b/cmd/mount/fs.go
@@ -85,7 +85,9 @@ func translateError(err error) error {
 	case vfs.EROFS:
 		return fuse.Errno(syscall.EROFS)
 	case vfs.ENOSYS:
-		return fuse.Errno(syscall.ENOSYS)
+		return fuse.ENOSYS
+	case vfs.EPERM:
+		return fuse.EPERM
 	}
 	return err
 }
diff --git a/vfs/dir.go b/vfs/dir.go
index b2f71eb77..6072821f4 100644
--- a/vfs/dir.go
+++ b/vfs/dir.go
@@ -311,7 +311,7 @@ func (d *Dir) Open(flags int) (fd Handle, err error) {
 	rdwrMode := flags & (os.O_RDONLY | os.O_WRONLY | os.O_RDWR)
 	if rdwrMode != os.O_RDONLY {
 		fs.Errorf(d, "Can only open directories read only")
-		return nil, os.ErrPermission
+		return nil, EPERM
 	}
 	return newDirHandle(d), nil
 }
diff --git a/vfs/errors.go b/vfs/errors.go
index 3d0813ebe..28e768682 100644
--- a/vfs/errors.go
+++ b/vfs/errors.go
@@ -26,6 +26,7 @@ const (
 var (
 	ENOENT = os.ErrNotExist
 	EEXIST = os.ErrExist
+	EPERM  = os.ErrPermission
 )
 
 var errorNames = []string{
diff --git a/vfs/file.go b/vfs/file.go
index d7043428e..2e26b3b6e 100644
--- a/vfs/file.go
+++ b/vfs/file.go
@@ -298,10 +298,10 @@ func (f *File) Open(flags int) (fd Handle, err error) {
 		read = false
 	case rdwrMode == os.O_RDWR:
 		fs.Errorf(f, "Can't open for Read and Write")
-		return nil, os.ErrPermission
+		return nil, EPERM
 	default:
 		fs.Errorf(f, "Can't figure out how to open with flags: 0x%X", flags)
-		return nil, os.ErrPermission
+		return nil, EPERM
 	}
 	if read {
 		fd, err = f.OpenRead()