* process.c (maxgroups, proc_setmaxgroups): increase max groups

  limitation up to 65536.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@31034 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

2 files changed, 29 insertions, 3 deletions

diff --git a/ChangeLog b/ChangeLog
index 225052a9a3..cba6787adf 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Sun Mar  6 23:18:23 2011  KOSAKI Motohiro  <kosaki.motohiro@gmail.com>
+
+	* process.c (maxgroups, proc_setmaxgroups): increase max groups
+	  limitation up to 65536.
+
 Sun Mar  6 22:20:59 2011  Tanaka Akira  <akr@fsij.org>
 
 	* ext/openssl/ossl_pkey_ec.c: parenthesize macro arguments.
diff --git a/process.c b/process.c
index 38f5e28faa..e55c3fda83 100644
--- a/process.c
+++ b/process.c
@@ -4531,7 +4531,28 @@ proc_setgid(VALUE obj, VALUE id)
 #endif
 
 
-static int maxgroups = 32;
+/*
+ * Maximum supplementary groups are platform dependent.
+ * FWIW, 65536 is enough big for our supported OSs.
+ *
+ * OS Name			max groups
+ * -----------------------------------------------
+ * Linux Kernel >= 2.6.3	65536
+ * Linux Kernel < 2.6.3		   32
+ * IBM AIX 5.2			   64
+ * IBM AIX 5.3 ... 6.1		  128
+ * IBM AIX 7.1			  128 (can be configured to be up to 2048)
+ * OpenBSD, NetBSD		   16
+ * FreeBSD < 8.0		   16
+ * FreeBSD >=8.0		 1023
+ * Darwin (Mac OS X)		   16
+ * Sun Solaris 7,8,9,10		   16
+ * Sun Solaris 11 / OpenSolaris	 1024
+ * HP-UX			   20
+ * Windows			 1015
+ */
+#define RB_MAX_GROUPS (65536)
+static int maxgroups = RB_MAX_GROUPS;
 
 
 #ifdef HAVE_GETGROUPS
@@ -4694,8 +4715,8 @@ proc_setmaxgroups(VALUE obj, VALUE val)
 {
     int ngroups = FIX2UINT(val);
 
-    if (ngroups > 4096)
-	ngroups = 4096;
+    if (ngroups > RB_MAX_GROUPS)
+	ngroups = RB_MAX_GROUPS;
 
     maxgroups = ngroups;