56 lines
1.7 KiB
C
56 lines
1.7 KiB
C
/* Copyright (C) 1991 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 1, or (at your option)
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any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with the GNU C Library; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include <ansidecl.h>
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#include <sysdep.h>
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#include <errno.h>
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#include <stddef.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <limits.h>
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#include <stdlib.h>
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extern int EXFUN(__bsd_getgroups, (int n, int list[]));
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/* If SIZE is zero, return the number of supplementary groups
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the calling process is in. Otherwise, fill in the group IDs
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of its supplementary groups in LIST and return the number written. */
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int
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DEFUN(__getgroups, (size, list), int size AND gid_t list[])
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{
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int *groups;
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int n;
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register int i;
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if (sizeof (gid_t) == sizeof (int) || size == 0)
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return __bsd_getgroups (size, (int *) NULL);
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if (size < 0 || size > NGROUPS_MAX || list == NULL)
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{
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errno = EINVAL;
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return -1;
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}
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groups = (int *) __alloca (size * sizeof (int));
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n = __bsd_getgroups(size, groups);
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if (n != -1)
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for (i = 0; i < n; ++i)
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list[i] = (gid_t) groups[i];
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return n;
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}
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