Subject: Re: bug#14463: coreutils-8.21 darwin regressions
From: Paul Eggert <[email-masked]>
To: Jack Howarth <[email-masked]>
Cc: Gnulib bugs <[email-masked]>, [email-masked]
Date: Wed, 13 Nov 2013 07:57:28 -0800
List-Id: <debbugs-submit.debbugs.gnu.org>

Thanks, I pushed the following patch to gnulib.  It should be
incorporated automatically into the next version of coreutils
so I'm marking the bug as done.

diff --git a/ChangeLog b/ChangeLog
index 59de3e5..aae8c64 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2013-11-13  Paul Eggert  <[email-masked]>
+
+	* lib/getgroups.c (posix_getgroups, getgroups) [__APPLE__]:
+	New function and macro, to work around _DARWIN_C_SOURCE problem.
+	Reported by Jack Howarth in <http://bugs.gnu.org/14463>.
+
 2013-11-11  Pádraig Brady <[email-masked]>
 
 	base64: provide a fast path for encoding well sized buffers
diff --git a/lib/getgroups.c b/lib/getgroups.c
index e71b543..482b24a 100644
--- a/lib/getgroups.c
+++ b/lib/getgroups.c
@@ -43,6 +43,21 @@ getgroups (int n _GL_UNUSED, GETGROUPS_T *groups _GL_UNUSED)
 #  define GETGROUPS_ZERO_BUG 0
 # endif
 
+/* On OS X 10.6 and later, use the usual getgroups, not the one
+   supplied when _DARWIN_C_SOURCE is defined.  _DARWIN_C_SOURCE is
+   normally defined, since it means "conform to POSIX, but add
+   non-POSIX extensions even if that violates the POSIX namespace
+   rules", which is what we normally want.  But with getgroups there
+   is an inconsistency, and _DARWIN_C_SOURCE means "change getgroups()
+   so that it no longer works right".  The BUGS section of compat(5)
+   says that the behavior is dubious if you compile different sections
+   of a program with different _DARWIN_C_SOURCE settings, so fix only
+   the offending symbol.  */
+# ifdef __APPLE__
+int posix_getgroups (int, gid_t []) __asm ("_getgroups");
+#  define getgroups posix_getgroups
+# endif
+
 /* On at least Ultrix 4.3 and NextStep 3.2, getgroups (0, NULL) always
    fails.  On other systems, it returns the number of supplemental
    groups for the process.  This function handles that special case