From b3a49ee8d0391d48d588888ae5df5554236bd461 Mon Sep 17 00:00:00 2001 From: Jim Meyering Date: Thu, 19 Dec 1996 13:53:16 +0000 Subject: . --- lib/getgroups.c | 57 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 57 insertions(+) create mode 100644 lib/getgroups.c diff --git a/lib/getgroups.c b/lib/getgroups.c new file mode 100644 index 000000000..717f90e4a --- /dev/null +++ b/lib/getgroups.c @@ -0,0 +1,57 @@ +/* provide consistent interface to getgroups for systems that don't allow N==0 + Copyright (C) 1996 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 + the Free Software Foundation; either version 2, or (at your option) + any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software Foundation, + Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + +/* written by Jim Meyering */ + +#include +#include +#include + +char *xmalloc (); + +/* On Ultrix 4.3, getgroups (0, 0) always fails. + 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; +{ + int ng; + GETGROUPS_T *gbuf; + +#undef getgroups + + if (n != 0) + return getgroups (n, group); + + n = 20; + gbuf = NULL; + while (1) + { + gbuf = (GETGROUPS_T *) xrealloc (gbuf, n * sizeof (GETGROUPS_T)); + ng = getgroups (n, gbuf); + if (ng < n) + break; + n += 10; + } + + free (gbuf); + + return ng; +} -- cgit v1.2.3-70-g09d2