From c40d14204290410ba56a30eb0457e37a71dae82e Mon Sep 17 00:00:00 2001
From: Russ Cox <rsc@golang.org>
Date: Mon, 18 May 2009 14:56:25 -0700
Subject: Getgroups max on Linux is bigger than I thought.

R=iant
DELTA=3  (2 added, 0 deleted, 1 changed)
OCL=28994
CL=29003
---
 src/lib/os/user.go | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'src/lib/os/user.go')

diff --git a/src/lib/os/user.go b/src/lib/os/user.go
index 1549abdcd..194aa50e4 100644
--- a/src/lib/os/user.go
+++ b/src/lib/os/user.go
@@ -44,7 +44,9 @@ func Getgroups() ([]int, os.Error) {
 		return nil, ErrnoToError(err);
 	}
 
-	if r1 < 0 || r1 > 1024 {	// the current max is 16; 1024 is a future-proof sanity check
+	// Sanity check group count.
+	// On Linux, max is 1<<16; on BSD, OS X, max is 16.
+	if r1 < 0 || r1 > 1<<20 {
 		return nil, EINVAL;
 	}
 	a := make([]int, r1);
-- 
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