]>
Commit | Line | Data |
---|---|---|
da058e45 | 1 | /* Copyright (C) 1997, 1998, 2000, 2001, 2003 Free Software Foundation, Inc. |
5290baf0 UD |
2 | This file is part of the GNU C Library. |
3 | ||
4 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
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. | |
5290baf0 UD |
8 | |
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 | |
41bdb6e2 | 12 | Lesser General Public License for more details. |
5290baf0 | 13 | |
41bdb6e2 AJ |
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 | |
17 | 02111-1307 USA. */ | |
5290baf0 | 18 | |
0dee6738 | 19 | #include <errno.h> |
5290baf0 | 20 | #include <unistd.h> |
9271a050 UD |
21 | #include <sys/param.h> |
22 | #include <sys/types.h> | |
5290baf0 | 23 | |
0dee6738 | 24 | #include <sysdep.h> |
9271a050 | 25 | #include <sys/syscall.h> |
4bbb61e4 GM |
26 | #include <bp-checks.h> |
27 | ||
5290baf0 | 28 | #include <linux/posix_types.h> |
313fed01 UD |
29 | #include <kernel-features.h> |
30 | ||
31 | ||
313fed01 | 32 | #ifdef __NR_getgroups32 |
313fed01 UD |
33 | # if __ASSUME_32BITUIDS == 0 |
34 | /* This variable is shared with all files that need to check for 32bit | |
35 | uids. */ | |
da058e45 | 36 | extern int __libc_missing_32bit_uids attribute_hidden; |
313fed01 UD |
37 | # endif |
38 | #endif /* __NR_getgroups32 */ | |
5290baf0 UD |
39 | |
40 | /* For Linux we must convert the array of groups from the format that the | |
41 | kernel returns. */ | |
42 | int | |
313fed01 | 43 | __getgroups (int n, gid_t *groups) |
5290baf0 | 44 | { |
5e311497 UD |
45 | #if __ASSUME_32BITUIDS > 0 |
46 | return INLINE_SYSCALL (getgroups32, 2, n, CHECK_N (groups, n)); | |
47 | #else | |
48 | if (__builtin_expect (n, 1) < 0) | |
9271a050 UD |
49 | { |
50 | __set_errno (EINVAL); | |
51 | return -1; | |
52 | } | |
53 | else | |
54 | { | |
32c075e1 JJ |
55 | int i, ngids; |
56 | __kernel_gid_t kernel_groups[n = MIN (n, __sysconf (_SC_NGROUPS_MAX))]; | |
313fed01 | 57 | # ifdef __NR_getgroups32 |
cd090f71 | 58 | if (__libc_missing_32bit_uids <= 0) |
313fed01 UD |
59 | { |
60 | int result; | |
61 | int saved_errno = errno; | |
62 | ||
4bbb61e4 | 63 | result = INLINE_SYSCALL (getgroups32, 2, n, CHECK_N (groups, n)); |
da058e45 | 64 | if (result != -1 || errno != ENOSYS) |
313fed01 UD |
65 | return result; |
66 | ||
67 | __set_errno (saved_errno); | |
68 | __libc_missing_32bit_uids = 1; | |
69 | } | |
70 | # endif /* __NR_getgroups32 */ | |
9271a050 | 71 | |
4bbb61e4 | 72 | ngids = INLINE_SYSCALL (getgroups, 2, n, CHECK_N (kernel_groups, n)); |
9271a050 UD |
73 | if (n != 0 && ngids > 0) |
74 | for (i = 0; i < ngids; i++) | |
4bbb61e4 | 75 | (__ptrvalue (groups))[i] = kernel_groups[i]; |
9271a050 | 76 | return ngids; |
ebf282c9 | 77 | } |
5e311497 | 78 | #endif |
5290baf0 UD |
79 | } |
80 | ||
81 | weak_alias (__getgroups, getgroups) |