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From: Jilles Tjoelker <jilles@FreeBSD.org>
Date: Sun, 30 Jan 2011 20:37:42 +0000 (UTC)
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Subject: svn commit: r218102 - stable/8/lib/libc/sys
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Author: jilles
Date: Sun Jan 30 20:37:42 2011
New Revision: 218102
URL: http://svn.freebsd.org/changeset/base/218102

Log:
  MFC r217704: getgroups(2): Remove <sys/types.h> and refer to sysconf(3).
  
  Because {NGROUPS_MAX} may become variable, its value should be obtained
  using sysconf(3).
  
  In head, r217704 removed mention of <sys/param.h>; this was not mentioned in
  stable/8.

Modified:
  stable/8/lib/libc/sys/getgroups.2
Directory Properties:
  stable/8/lib/libc/   (props changed)
  stable/8/lib/libc/stdtime/   (props changed)

Modified: stable/8/lib/libc/sys/getgroups.2
==============================================================================
--- stable/8/lib/libc/sys/getgroups.2	Sun Jan 30 20:31:43 2011	(r218101)
+++ stable/8/lib/libc/sys/getgroups.2	Sun Jan 30 20:37:42 2011	(r218102)
@@ -28,7 +28,7 @@
 .\"     @(#)getgroups.2	8.2 (Berkeley) 4/16/94
 .\" $FreeBSD$
 .\"
-.Dd March 5, 1999
+.Dd January 21, 2011
 .Dt GETGROUPS 2
 .Os
 .Sh NAME
@@ -37,7 +37,6 @@
 .Sh LIBRARY
 .Lb libc
 .Sh SYNOPSIS
-.In sys/types.h
 .In unistd.h
 .Ft int
 .Fn getgroups "int gidsetlen" "gid_t *gidset"
@@ -66,6 +65,12 @@ is zero,
 returns the number of supplementary group IDs associated with
 the calling process without modifying the array pointed to by
 .Fa gidset .
+.Pp
+The value of
+.Dv {NGROUPS_MAX}
+should be obtained using
+.Xr sysconf 3
+to avoid hard-coding it into the executable.
 .Sh RETURN VALUES
 A successful call returns the number of groups in the group set.
 A value of -1 indicates that an error occurred, and the error
@@ -88,7 +93,8 @@ an invalid address.
 .El
 .Sh SEE ALSO
 .Xr setgroups 2 ,
-.Xr initgroups 3
+.Xr initgroups 3 ,
+.Xr sysconf 3
 .Sh STANDARDS
 The
 .Fn getgroups