mirror of
https://sourceware.org/git/glibc.git
synced 2025-10-30 10:45:40 +03:00
83 lines
2.3 KiB
C
83 lines
2.3 KiB
C
/* Copyright (C) 1997, 1998, 2000, 2001, 2003 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library 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
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
#include <errno.h>
|
|
#include <unistd.h>
|
|
#include <sys/param.h>
|
|
#include <sys/types.h>
|
|
|
|
#include <sysdep.h>
|
|
#include <sys/syscall.h>
|
|
#include <bp-checks.h>
|
|
|
|
#include <linux/posix_types.h>
|
|
#include <kernel-features.h>
|
|
|
|
|
|
#ifdef __NR_getgroups32
|
|
# if __ASSUME_32BITUIDS == 0
|
|
/* This variable is shared with all files that need to check for 32bit
|
|
uids. */
|
|
extern int __libc_missing_32bit_uids attribute_hidden;
|
|
# endif
|
|
#endif /* __NR_getgroups32 */
|
|
|
|
/* For Linux we must convert the array of groups from the format that the
|
|
kernel returns. */
|
|
int
|
|
__getgroups (int n, gid_t *groups)
|
|
{
|
|
#if __ASSUME_32BITUIDS > 0
|
|
return INLINE_SYSCALL (getgroups32, 2, n, CHECK_N (groups, n));
|
|
#else
|
|
if (__builtin_expect (n, 1) < 0)
|
|
{
|
|
__set_errno (EINVAL);
|
|
return -1;
|
|
}
|
|
else
|
|
{
|
|
# ifdef __NR_getgroups32
|
|
if (__libc_missing_32bit_uids <= 0)
|
|
{
|
|
int result;
|
|
int saved_errno = errno;
|
|
|
|
result = INLINE_SYSCALL (getgroups32, 2, n, CHECK_N (groups, n));
|
|
if (result != -1 || errno != ENOSYS)
|
|
return result;
|
|
|
|
__set_errno (saved_errno);
|
|
__libc_missing_32bit_uids = 1;
|
|
}
|
|
# endif /* __NR_getgroups32 */
|
|
|
|
int i, ngids;
|
|
__kernel_gid_t kernel_groups[n = MIN (n, __sysconf (_SC_NGROUPS_MAX))];
|
|
|
|
ngids = INLINE_SYSCALL (getgroups, 2, n, CHECK_N (kernel_groups, n));
|
|
if (n != 0 && ngids > 0)
|
|
for (i = 0; i < ngids; i++)
|
|
(__ptrvalue (groups))[i] = kernel_groups[i];
|
|
return ngids;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
weak_alias (__getgroups, getgroups)
|