lib/xgetgroups.c

   1 /* xgetgroups.c -- return a list of the groups a user or current process is in
   2
   3    Copyright (C) 2007-2024 Free Software Foundation, Inc.
   4
   5    This program is free software: you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation, either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  17
  18 /* Extracted from coreutils' src/id.c. */
  19
  20 #include <config.h>
  21
  22 #include "mgetgroups.h"
  23
  24 #include <errno.h>
  25
  26 #include "xalloc.h"
  27
  28 /* Like mgetgroups, but call xalloc_die on allocation failure.  */
  29
  30 int
  31 xgetgroups (char const *username, gid_t gid, gid_t **groups)
  32 {
  33   int result = mgetgroups (username, gid, groups);
  34   if (result == -1 && errno == ENOMEM)
  35     xalloc_die ();
  36   return result;
  37 }