2a584a8937
It will help for us to rename earlier vs later, and syscallfs will be laborious, especially after we introduce an FSConfig type and need to declare a method name that differentiates from normal fs.FS. e.g. WithFS vs WithSysFS reads nicer than WithSyscallFS, and meanwhile sys is already a public package. Signed-off-by: Adrian Cole <adrian@tetrate.io>
57 lines
1.3 KiB
Go
57 lines
1.3 KiB
Go
package sysfs
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import (
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"fmt"
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"io/fs"
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"syscall"
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)
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// UnimplementedFS is an FS that returns syscall.ENOSYS for all functions,
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// This should be embedded to have forward compatible implementations.
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type UnimplementedFS struct{}
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// String implements fmt.Stringer
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func (UnimplementedFS) String() string {
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return "Unimplemented:/"
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}
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// Open implements the same method as documented on fs.FS
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func (UnimplementedFS) Open(name string) (fs.File, error) {
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panic(fmt.Errorf("unexpected to call fs.FS.Open(%s)", name))
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}
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// GuestDir implements FS.GuestDir
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func (UnimplementedFS) GuestDir() string {
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return "/"
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}
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// OpenFile implements FS.OpenFile
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func (UnimplementedFS) OpenFile(path string, flag int, perm fs.FileMode) (fs.File, error) {
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return nil, syscall.ENOSYS
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}
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// Mkdir implements FS.Mkdir
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func (UnimplementedFS) Mkdir(path string, perm fs.FileMode) error {
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return syscall.ENOSYS
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}
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// Rename implements FS.Rename
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func (UnimplementedFS) Rename(from, to string) error {
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return syscall.ENOSYS
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}
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// Rmdir implements FS.Rmdir
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func (UnimplementedFS) Rmdir(path string) error {
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return syscall.ENOSYS
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}
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// Unlink implements FS.Unlink
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func (UnimplementedFS) Unlink(path string) error {
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return syscall.ENOSYS
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}
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// Utimes implements FS.Utimes
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func (UnimplementedFS) Utimes(path string, atimeNsec, mtimeNsec int64) error {
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return syscall.ENOSYS
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}
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