os: handle ' is a directory' error as IsExist on Plan 9

This error is returned by os.Mkdir when the directory already exists.

This change fixes some upspin tests.

Change-Id: I9ad5aefebb32dff577726d537b4f3826d79868eb
Reviewed-on: https://go-review.googlesource.com/88656
Reviewed-by: David du Colombier <0intro@gmail.com>
Run-TryBot: David du Colombier <0intro@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>

diff --git a/src/os/error_plan9.go b/src/os/error_plan9.go
index a67343981e22f34296ccfe12adf227fc461e72d8..0d76a66e45353b934ea2417233d4ac00f1f27dc6 100644 (file)
--- a/src/os/error_plan9.go
+++ b/src/os/error_plan9.go
@@ -5,7 +5,7 @@
 package os
 
 func isExist(err error) bool {
-       return checkErrMessageContent(err, " exists")
+       return checkErrMessageContent(err, " exists", " is a directory")
 }
 
 func isNotExist(err error) bool {