From 16fa36802d4b303cb49919759a35550fbe2a7fed Mon Sep 17 00:00:00 2001
From: Nidhi Doshi <nidhi@instabase.com>
Date: Sat, 3 Apr 2021 20:18:53 -0700
Subject: [PATCH] os/file Fix the op for errors returned from WriteAt,
 ReadFrom, ReadAt

---
 src/os/file.go | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/src/os/file.go b/src/os/file.go
index ebeb0d0ac9c..d171b630a19 100644
--- a/src/os/file.go
+++ b/src/os/file.go
@@ -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).
 // At end of file, that error is io.EOF.
 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
 	}
 
@@ -136,7 +136,7 @@ func (f *File) ReadAt(b []byte, off int64) (n int, err error) {
 	for len(b) > 0 {
 		m, e := f.pread(b, off)
 		if e != nil {
-			err = f.wrapErr("read", e)
+			err = f.wrapErr("readat", e)
 			break
 		}
 		n += m
@@ -148,14 +148,14 @@ func (f *File) ReadAt(b []byte, off int64) (n int, err error) {
 
 // ReadFrom implements io.ReaderFrom.
 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
 	}
 	n, handled, e := f.readFrom(r)
 	if !handled {
 		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) {
@@ -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.
 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
 	}
 	if f.appendMode {
@@ -212,7 +212,7 @@ func (f *File) WriteAt(b []byte, off int64) (n int, err error) {
 	for len(b) > 0 {
 		m, e := f.pwrite(b, off)
 		if e != nil {
-			err = f.wrapErr("write", e)
+			err = f.wrapErr("writeat", e)
 			break
 		}
 		n += m