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glibc  2.9
getgroups.c
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00001 /* Copyright (C) 1994, 1995, 1997, 2004 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003 
00004    The GNU C Library is free software; you can redistribute it and/or
00005    modify it under the terms of the GNU Lesser General Public
00006    License as published by the Free Software Foundation; either
00007    version 2.1 of the License, or (at your option) any later version.
00008 
00009    The GNU C Library is distributed in the hope that it will be useful,
00010    but WITHOUT ANY WARRANTY; without even the implied warranty of
00011    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012    Lesser General Public License for more details.
00013 
00014    You should have received a copy of the GNU Lesser General Public
00015    License along with the GNU C Library; if not, write to the Free
00016    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00017    02111-1307 USA.  */
00018 
00019 #include <sys/types.h>
00020 #include <unistd.h>
00021 #include <limits.h>
00022 #include <alloca.h>
00023 
00024 extern int __sco_getgroups (int size, unsigned short int *list);
00025 
00026 int
00027 __getgroups (size, list)
00028      int size; gid_t *list;
00029 {
00030   int i;
00031   unsigned short int *shortlist;
00032 
00033   if (size <= 0)
00034     return __sco_getgroups (size, NULL);
00035 
00036   shortlist = __alloca (size * sizeof (*shortlist));
00037 
00038   size = __sco_getgroups (size, shortlist);
00039   for (i = 0; i < size; ++i)
00040     list[i] = shortlist[i];
00041 
00042   return size;
00043 }
00044 
00045 weak_alias (__getgroups, getgroups)