From: Russ Cox <rsc@golang.org>
Date: Mon, 18 May 2009 21:56:25 +0000 (-0700)
Subject: Getgroups max on Linux is bigger than I thought.
X-Git-Tag: weekly.2009-11-06~1614
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=69f55d148730f8ed9c83bc09aaf6352486ea3518;p=gostls13.git

Getgroups max on Linux is bigger than I thought.

R=iant
DELTA=3  (2 added, 0 deleted, 1 changed)
OCL=28994
CL=29003
---

diff --git a/src/lib/os/user.go b/src/lib/os/user.go
index 1549abdcd5..194aa50e44 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);