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os/file Fix the op for errors returned from WriteAt, ReadFrom, ReadAt

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This commit is contained in:
Nidhi Doshi 2021-04-03 20:18:53 -07:00
parent 776d8d387c
commit 16fa36802d
1 changed files with 6 additions and 6 deletions
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12
src/os/file.go
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@ -125,7 +125,7 @@ func (f *File) Read(b []byte) (n int, err error) {
// ReadAt always returns a non-nil error when n < len(b). // ReadAt always returns a non-nil error when n < len(b).
// At end of file, that error is io.EOF. // At end of file, that error is io.EOF.
func (f *File) ReadAt(b []byte, off int64) (n int, err error) { func (f *File) ReadAt(b []byte, off int64) (n int, err error) {
if err := f.checkValid("read"); err != nil { if err := f.checkValid("readat"); err != nil {
return 0, err return 0, err
} }
@ -136,7 +136,7 @@ func (f *File) ReadAt(b []byte, off int64) (n int, err error) {
for len(b) > 0 { for len(b) > 0 {
m, e := f.pread(b, off) m, e := f.pread(b, off)
if e != nil { if e != nil {
err = f.wrapErr("read", e) err = f.wrapErr("readat", e)
break break
} }
n += m n += m
@ -148,14 +148,14 @@ func (f *File) ReadAt(b []byte, off int64) (n int, err error) {
// ReadFrom implements io.ReaderFrom. // ReadFrom implements io.ReaderFrom.
func (f *File) ReadFrom(r io.Reader) (n int64, err error) { func (f *File) ReadFrom(r io.Reader) (n int64, err error) {
if err := f.checkValid("write"); err != nil { if err := f.checkValid("readfrom"); err != nil {
return 0, err return 0, err
} }
n, handled, e := f.readFrom(r) n, handled, e := f.readFrom(r)
if !handled { if !handled {
return genericReadFrom(f, r) // without wrapping return genericReadFrom(f, r) // without wrapping
} }
return n, f.wrapErr("write", e) return n, f.wrapErr("readfrom", e)
} }
func genericReadFrom(f *File, r io.Reader) (int64, error) { func genericReadFrom(f *File, r io.Reader) (int64, error) {
@ -198,7 +198,7 @@ var errWriteAtInAppendMode = errors.New("os: invalid use of WriteAt on file open
// //
// If file was opened with the O_APPEND flag, WriteAt returns an error. // If file was opened with the O_APPEND flag, WriteAt returns an error.
func (f *File) WriteAt(b []byte, off int64) (n int, err error) { func (f *File) WriteAt(b []byte, off int64) (n int, err error) {
if err := f.checkValid("write"); err != nil { if err := f.checkValid("writeat"); err != nil {
return 0, err return 0, err
} }
if f.appendMode { if f.appendMode {
@ -212,7 +212,7 @@ func (f *File) WriteAt(b []byte, off int64) (n int, err error) {
for len(b) > 0 { for len(b) > 0 {
m, e := f.pwrite(b, off) m, e := f.pwrite(b, off)
if e != nil { if e != nil {
err = f.wrapErr("write", e) err = f.wrapErr("writeat", e)
break break
} }
n += m n += m