internal/poll: use io.Seek* constants

internal/poll already imports io so use the io.Seek* constants instead
of defining them locally.

Change-Id: I91218c021e882e044503cae64b699e5a236ecc38
Reviewed-on: https://go-review.googlesource.com/c/go/+/623236
Auto-Submit: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Damien Neil <dneil@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Commit-Queue: Ian Lance Taylor <iant@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>

diff --git a/src/internal/poll/sendfile_unix.go b/src/internal/poll/sendfile_unix.go
index 881625ce58fde0abe1840ea75d0a4407f312b257..3f193e40a6dccdcf49a5d793ee7667925b574bb7 100644 (file)
--- a/src/internal/poll/sendfile_unix.go
+++ b/src/internal/poll/sendfile_unix.go
@@ -7,6 +7,7 @@
 package poll
 
 import (
+       "io"
        "runtime"
        "syscall"
 )
@@ -40,13 +41,8 @@ func SendFile(dstFD *FD, src int, size int64) (n int64, err error, handled bool)
        // if you pass it offset 0, it starts from offset 0.
        // There's no way to tell it "start from current position",
        // so we have to manage that explicitly.
-       const (
-               seekStart   = 0
-               seekCurrent = 1
-               seekEnd     = 2
-       )
        start, err := ignoringEINTR2(func() (int64, error) {
-               return syscall.Seek(src, 0, seekCurrent)
+               return syscall.Seek(src, 0, io.SeekCurrent)
        })
        if err != nil {
                return 0, err, false
@@ -75,7 +71,7 @@ func SendFile(dstFD *FD, src int, size int64) (n int64, err error, handled bool)
        mustReposition := false
        if runtime.GOOS == "solaris" && size == 0 {
                end, err := ignoringEINTR2(func() (int64, error) {
-                       return syscall.Seek(src, 0, seekEnd)
+                       return syscall.Seek(src, 0, io.SeekEnd)
                })
                if err != nil {
                        return 0, err, false
@@ -88,7 +84,7 @@ func SendFile(dstFD *FD, src int, size int64) (n int64, err error, handled bool)
        n, err, handled = sendFile(dstFD, src, &pos, size)
        if n > 0 || mustReposition {
                ignoringEINTR2(func() (int64, error) {
-                       return syscall.Seek(src, start+n, seekStart)
+                       return syscall.Seek(src, start+n, io.SeekStart)
                })
        }
        return n, err, handled