templatefs

package
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 Go to latest Published: Aug 13, 2020 License: Apache-2.0 Imports: 2 Imported by: 2

Documentation

Overview

Package templatefs provides template p9.Files.

NoopFile can be used to leave some methods unimplemented in incomplete p9.File implementations.

NilCloser, ReadOnlyFile, NotDirectoryFile, and NotSymlinkFile can be used as templates for commonly implemented file types. They are careful not to conflict with each others' methods, so they can be embedded together.

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

This section is empty.

Types

type IsDir 

type IsDir struct{}

IsDir returns EISDIR for ReadAt and WriteAt.

func (IsDir) ReadAt 

func (IsDir) ReadAt(p []byte, offset int64) (int, error)

ReadAt implements p9.File.ReadAt.

func (IsDir) WriteAt 

func (IsDir) WriteAt(p []byte, offset int64) (int, error)

WriteAt implements p9.File.WriteAt.

type NilCloser 

type NilCloser struct{}

NilCloser returns nil for Close.

func (NilCloser) Close 

func (NilCloser) Close() error

Close implements p9.File.Close.

type NoopFile 

type NoopFile struct {
	p9.DefaultWalkGetAttr
	NilCloser
	NoopRenamed
}

NoopFile is a p9.File that returns ENOSYS for every method.

func (NoopFile) Create 

func (NoopFile) Create(name string, mode p9.OpenFlags, permissions p9.FileMode, _ p9.UID, _ p9.GID) (p9.File, p9.QID, uint32, error)

Create implements p9.File.Create.

func (NoopFile) FSync 

func (NoopFile) FSync() error

FSync implements p9.File.FSync.

func (NoopFile) GetAttr 

func (NoopFile) GetAttr(req p9.AttrMask) (p9.QID, p9.AttrMask, p9.Attr, error)

GetAttr implements p9.File.GetAttr. 

func (NoopFile) Link(target p9.File, newname string) error

Link implements p9.File.Link.

func (NoopFile) Mkdir 

func (NoopFile) Mkdir(name string, permissions p9.FileMode, _ p9.UID, _ p9.GID) (p9.QID, error)

Mkdir implements p9.File.Mkdir.

func (NoopFile) Mknod 

func (NoopFile) Mknod(name string, mode p9.FileMode, major uint32, minor uint32, _ p9.UID, _ p9.GID) (p9.QID, error)

Mknod implements p9.File.Mknod.

func (NoopFile) Open 

func (NoopFile) Open(mode p9.OpenFlags) (p9.QID, uint32, error)

Open implements p9.File.Open.

func (NoopFile) ReadAt 

func (NoopFile) ReadAt(p []byte, offset int64) (int, error)

ReadAt implements p9.File.ReadAt.

func (NoopFile) Readdir 

func (NoopFile) Readdir(offset uint64, count uint32) (p9.Dirents, error)

Readdir implements p9.File.Readdir. 

func (NoopFile) Readlink() (string, error)

Readlink implements p9.File.Readlink.

func (NoopFile) Remove 

func (NoopFile) Remove() error

Remove implements p9.File.Remove.

func (NoopFile) Rename 

func (NoopFile) Rename(directory p9.File, name string) error

Rename implements p9.File.Rename.

func (NoopFile) RenameAt 

func (NoopFile) RenameAt(oldname string, newdir p9.File, newname string) error

RenameAt implements p9.File.RenameAt.

func (NoopFile) SetAttr 

func (NoopFile) SetAttr(valid p9.SetAttrMask, attr p9.SetAttr) error

SetAttr implements p9.File.SetAttr.

func (NoopFile) StatFS 

func (NoopFile) StatFS() (p9.FSStat, error)

StatFS implements p9.File.StatFS.

Not implemented. 

func (NoopFile) Symlink(oldname string, newname string, _ p9.UID, _ p9.GID) (p9.QID, error)

Symlink implements p9.File.Symlink.

func (NoopFile) UnlinkAt 

func (NoopFile) UnlinkAt(name string, flags uint32) error

UnlinkAt implements p9.File.UnlinkAt.

func (NoopFile) Walk 

func (NoopFile) Walk(names []string) ([]p9.QID, p9.File, error)

Walk implements p9.File.Walk.

func (NoopFile) WriteAt 

func (NoopFile) WriteAt(p []byte, offset int64) (int, error)

WriteAt implements p9.File.WriteAt.

type NoopRenamed 

type NoopRenamed struct{}

NoopRenamed does nothing when the file is renamed.

func (NoopRenamed) Renamed 

func (NoopRenamed) Renamed(parent p9.File, newName string)

Renamed implements p9.File.Renamed.

type NotDirectoryFile 

type NotDirectoryFile struct{}

NotDirectoryFile denies any directory operations with ENOTDIR.

Those operations are Create, Mkdir, Symlink, Link, Mknod, RenameAt, UnlinkAt, and Readdir.

func (NotDirectoryFile) Create 

func (NotDirectoryFile) Create(name string, mode p9.OpenFlags, permissions p9.FileMode, _ p9.UID, _ p9.GID) (p9.File, p9.QID, uint32, error)

Create implements p9.File.Create. 

func (NotDirectoryFile) Link(target p9.File, newname string) error

Link implements p9.File.Link.

func (NotDirectoryFile) Mkdir 

func (NotDirectoryFile) Mkdir(name string, permissions p9.FileMode, _ p9.UID, _ p9.GID) (p9.QID, error)

Mkdir implements p9.File.Mkdir.

func (NotDirectoryFile) Mknod 

func (NotDirectoryFile) Mknod(name string, mode p9.FileMode, major uint32, minor uint32, _ p9.UID, _ p9.GID) (p9.QID, error)

Mknod implements p9.File.Mknod.

func (NotDirectoryFile) Readdir 

func (NotDirectoryFile) Readdir(offset uint64, count uint32) (p9.Dirents, error)

Readdir implements p9.File.Readdir.

func (NotDirectoryFile) RenameAt 

func (NotDirectoryFile) RenameAt(oldname string, newdir p9.File, newname string) error

RenameAt implements p9.File.RenameAt. 

func (NotDirectoryFile) Symlink(oldname string, newname string, _ p9.UID, _ p9.GID) (p9.QID, error)

Symlink implements p9.File.Symlink.

func (NotDirectoryFile) UnlinkAt 

func (NotDirectoryFile) UnlinkAt(name string, flags uint32) error

UnlinkAt implements p9.File.UnlinkAt.

type NotSymlinkFile 

type NotSymlinkFile struct{}

NotSymlinkFile denies Readlink with EINVAL.

EINVAL is returned by readlink(2) when the file is not a symlink. 

func (NotSymlinkFile) Readlink() (string, error)

Readlink implements p9.File.Readlink.

type ReadOnlyDir 

type ReadOnlyDir struct{}

ReadOnlyDir denies any directory and file operations with EROFS

Those operations are Create, Mkdir, Symlink, Link, Mknod, RenameAt, UnlinkAt, Readdir, Rename, SetAttr, FSync, and Remove.

func (ReadOnlyDir) Create 

func (ReadOnlyDir) Create(name string, mode p9.OpenFlags, permissions p9.FileMode, _ p9.UID, _ p9.GID) (p9.File, p9.QID, uint32, error)

Create implements p9.File.Create.

func (ReadOnlyDir) FSync 

func (ReadOnlyDir) FSync() error

FSync implements p9.File.FSync. 

func (ReadOnlyDir) Link(target p9.File, newname string) error

Link implements p9.File.Link.

func (ReadOnlyDir) Mkdir 

func (ReadOnlyDir) Mkdir(name string, permissions p9.FileMode, _ p9.UID, _ p9.GID) (p9.QID, error)

Mkdir implements p9.File.Mkdir.

func (ReadOnlyDir) Mknod 

func (ReadOnlyDir) Mknod(name string, mode p9.FileMode, major uint32, minor uint32, _ p9.UID, _ p9.GID) (p9.QID, error)

Mknod implements p9.File.Mknod.

func (ReadOnlyDir) Readdir 

func (ReadOnlyDir) Readdir(offset uint64, count uint32) (p9.Dirents, error)

Readdir implements p9.File.Readdir.

func (ReadOnlyDir) Remove 

func (ReadOnlyDir) Remove() error

Remove implements p9.File.Remove.

func (ReadOnlyDir) Rename 

func (ReadOnlyDir) Rename(directory p9.File, name string) error

Rename implements p9.File.Rename.

func (ReadOnlyDir) RenameAt 

func (ReadOnlyDir) RenameAt(oldname string, newdir p9.File, newname string) error

RenameAt implements p9.File.RenameAt.

func (ReadOnlyDir) SetAttr 

func (ReadOnlyDir) SetAttr(valid p9.SetAttrMask, attr p9.SetAttr) error

SetAttr implements p9.File.SetAttr. 

func (ReadOnlyDir) Symlink(oldname string, newname string, _ p9.UID, _ p9.GID) (p9.QID, error)

Symlink implements p9.File.Symlink.

func (ReadOnlyDir) UnlinkAt 

func (ReadOnlyDir) UnlinkAt(name string, flags uint32) error

UnlinkAt implements p9.File.UnlinkAt.

type ReadOnlyFile 

type ReadOnlyFile struct{}

ReadOnlyFile returns EROFS for FSync, SetAttr, Remove, Rename, WriteAt, and nil for Flush.

func (ReadOnlyFile) FSync 

func (ReadOnlyFile) FSync() error

FSync implements p9.File.FSync.

func (ReadOnlyFile) Flush 

func (ReadOnlyFile) Flush() error

Flush implements p9.File.Flush.

func (ReadOnlyFile) Remove 

func (ReadOnlyFile) Remove() error

Remove implements p9.File.Remove.

func (ReadOnlyFile) Rename 

func (ReadOnlyFile) Rename(directory p9.File, name string) error

Rename implements p9.File.Rename.

func (ReadOnlyFile) SetAttr 

func (ReadOnlyFile) SetAttr(valid p9.SetAttrMask, attr p9.SetAttr) error

SetAttr implements p9.File.SetAttr.

func (ReadOnlyFile) WriteAt 

func (ReadOnlyFile) WriteAt(p []byte, offset int64) (int, error)

WriteAt implements p9.File.WriteAt.

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