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io/fs: move FileInfo, FileMode, PathError, ErrInvalid, ... from os to io/fs

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First step of creating the new io/fs package.

For #41190.

Change-Id: I1339b1abdd533b0f1deab283628088b2f706fb5b
Reviewed-on: https://go-review.googlesource.com/c/go/+/243906
Trust: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
Run-TryBot: Emmanuel Odeke <emm.odeke@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com>
This commit is contained in:
Russ Cox 2020-07-06 09:49:20 -04:00
parent 627959eb04
commit d4da735091
6 changed files with 406 additions and 193 deletions
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32
src/os/error.go
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@ -7,6 +7,7 @@ package os
import (
"internal/oserror"
"internal/poll"
"io/fs"
)
// Portable analogs of some common system call errors.
@ -16,20 +17,17 @@ import (
var (
// ErrInvalid indicates an invalid argument.
// Methods on File will return this error when the receiver is nil.
ErrInvalid = errInvalid() // "invalid argument"
ErrInvalid = fs.ErrInvalid // "invalid argument"
ErrPermission = fs.ErrPermission // "permission denied"
ErrExist = fs.ErrExist // "file already exists"
ErrNotExist = fs.ErrNotExist // "file does not exist"
ErrClosed = fs.ErrClosed // "file already closed"
ErrPermission = errPermission() // "permission denied"
ErrExist = errExist() // "file already exists"
ErrNotExist = errNotExist() // "file does not exist"
ErrClosed = errClosed() // "file already closed"
ErrNoDeadline = errNoDeadline() // "file type does not support deadline"
ErrDeadlineExceeded = errDeadlineExceeded() // "i/o timeout"
)
func errInvalid() error { return oserror.ErrInvalid }
func errPermission() error { return oserror.ErrPermission }
func errExist() error { return oserror.ErrExist }
func errNotExist() error { return oserror.ErrNotExist }
func errClosed() error { return oserror.ErrClosed }
func errNoDeadline() error { return poll.ErrNoDeadline }
@ -47,21 +45,7 @@ type timeout interface {
}
// PathError records an error and the operation and file path that caused it.
type PathError struct {
Op string
Path string
Err error
}
func (e *PathError) Error() string { return e.Op + " " + e.Path + ": " + e.Err.Error() }
func (e *PathError) Unwrap() error { return e.Err }
// Timeout reports whether this error represents a timeout.
func (e *PathError) Timeout() bool {
t, ok := e.Err.(timeout)
return ok && t.Timeout()
}
type PathError = fs.PathError
// SyscallError records an error from a specific system call.
type SyscallError struct {