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diff lib/mgetgroups.c @ 18029:e4a13d95b503

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mgetgroups: port to strict OS X * doc/glibc-functions/getgrouplist.texi (getgrouplist): Document the getgrouplist problem. * lib/mgetgroups.c (getgrouplist_gids) [HAVE_GETGROUPLIST]: New macro. (mgetgroups): Use it. * m4/mgetgroups.m4 (gl_MGETGROUPS): Check for OS X signature for getgrouplist.
author Paul Eggert <eggert@cs.ucla.edu>
date Sun, 28 Jun 2015 23:43:35 -0700
parents ab58d4870664
children cbcda721f9b4
line wrap: on
line diff
--- a/lib/mgetgroups.c
+++ b/lib/mgetgroups.c
@@ -64,6 +64,11 @@
   gid_t *g;
 
 #if HAVE_GETGROUPLIST
+# if HAVE_GETGROUPLIST_WITH_INT
+#  define getgrouplist_gids(g) ((int *) (g))
+# else
+#  define getgrouplist_gids(g) (g)
+# endif
   /* We prefer to use getgrouplist if available, because it has better
      performance characteristics.
 
@@ -87,7 +92,8 @@
           int last_n_groups = max_n_groups;
 
           /* getgrouplist updates max_n_groups to num required.  */
-          ng = getgrouplist (username, gid, g, &max_n_groups);
+          ng = getgrouplist (username, gid, getgrouplist_gids (g),
+                             &max_n_groups);
 
           /* Some systems (like Darwin) have a bug where they
              never increase max_n_groups.  */