1 /* Copyright (C) 1997, 1998, 2000, 2001 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, write to the Free
16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
21 #include <sys/param.h>
22 #include <sys/types.h>
25 #include <sys/syscall.h>
26 #include <bp-checks.h>
28 #include <linux/posix_types.h>
29 #include <kernel-features.h>
32 extern int __syscall_getgroups (int, __kernel_gid_t
*__unbounded
);
34 #ifdef __NR_getgroups32
35 extern int __syscall_getgroups32 (int, __kernel_gid32_t
*__unbounded
);
36 # if __ASSUME_32BITUIDS == 0
37 /* This variable is shared with all files that need to check for 32bit
39 extern int __libc_missing_32bit_uids
;
41 #endif /* __NR_getgroups32 */
43 /* For Linux we must convert the array of groups from the format that the
46 __getgroups (int n
, gid_t
*groups
)
48 #if __ASSUME_32BITUIDS > 0
49 return INLINE_SYSCALL (getgroups32
, 2, n
, CHECK_N (groups
, n
));
51 if (__builtin_expect (n
, 1) < 0)
59 __kernel_gid_t kernel_groups
[n
= MIN (n
, __sysconf (_SC_NGROUPS_MAX
))];
60 # ifdef __NR_getgroups32
61 if (__libc_missing_32bit_uids
<= 0)
64 int saved_errno
= errno
;
66 result
= INLINE_SYSCALL (getgroups32
, 2, n
, CHECK_N (groups
, n
));
67 if (result
== 0 || errno
!= ENOSYS
)
70 __set_errno (saved_errno
);
71 __libc_missing_32bit_uids
= 1;
73 # endif /* __NR_getgroups32 */
75 ngids
= INLINE_SYSCALL (getgroups
, 2, n
, CHECK_N (kernel_groups
, n
));
76 if (n
!= 0 && ngids
> 0)
77 for (i
= 0; i
< ngids
; i
++)
78 (__ptrvalue (groups
))[i
] = kernel_groups
[i
];
84 weak_alias (__getgroups
, getgroups
)