From: Andrey Mirtchovski <mirtchovski@gmail.com>
Date: Mon, 31 Oct 2011 17:34:59 +0000 (-0400)
Subject: syscall: fix Await msg on Plan 9
X-Git-Tag: weekly.2011-11-01~21
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=d1f48db1cc021924e52614b5f7a71ab8bfa3f1cd;p=gostls13.git

syscall: fix Await msg on Plan 9

Plan 9's await() returns '' for nil exit status but programs, most notably gotest,
see this as an error return.

R=rsc
CC=golang-dev
https://golang.org/cl/5305079
---

diff --git a/src/pkg/syscall/syscall_plan9.go b/src/pkg/syscall/syscall_plan9.go
index eacdd93c9c..16f8e7337e 100644
--- a/src/pkg/syscall/syscall_plan9.go
+++ b/src/pkg/syscall/syscall_plan9.go
@@ -245,6 +245,10 @@ func Await(w *Waitmsg) (err Error) {
 	w.Time[1] = uint32(atoi(f[2]))
 	w.Time[2] = uint32(atoi(f[3]))
 	w.Msg = cstring(f[4])
+	if w.Msg == "''" {
+		// await() returns '' for no error
+		w.Msg = ""
+	}
 	return
 }