/* provide consistent interface to getgroups for systems that don't allow N==0
- Copyright (C) 1996 Free Software Foundation, Inc.
+ Copyright (C) 1996, 1999, 2003 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
#include <stdio.h>
#include <sys/types.h>
-char *xmalloc ();
+#include "xalloc.h"
-/* On Ultrix 4.3, getgroups (0, 0) always fails.
- This function handles that special case and lets the system-
- provided function handle all others. */
+/* On at least Ultrix 4.3 and NextStep 3.2, getgroups (0, 0) always fails.
+ On other systems, it returns the number of supplemental groups for the
+ process. This function handles that special case and lets the system-
+ provided function handle all others. */
int
-getgroups (n, group)
- size_t n;
- GETGROUPS_T *group;
+getgroups (size_t n, GETGROUPS_T *group)
{
- int ng;
+ int n_groups;
GETGROUPS_T *gbuf;
#undef getgroups
gbuf = NULL;
while (1)
{
- gbuf = (GETGROUPS_T *) xrealloc (gbuf, n * sizeof (GETGROUPS_T));
- ng = getgroups (n, gbuf);
- if (ng < n)
+ gbuf = xrealloc (gbuf, n * sizeof (GETGROUPS_T));
+ n_groups = getgroups (n, gbuf);
+ if (n_groups < n)
break;
n += 10;
}
free (gbuf);
- return ng;
+ return n_groups;
}