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6ddd37a4 | 1 | /* Copyright (C) 1998,2000,2003,2004,2006 Free Software Foundation, Inc. |
0dee6738 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. | |
0dee6738 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. |
0dee6738 | 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. */ | |
0dee6738 UD |
18 | |
19 | #include <errno.h> | |
0dee6738 | 20 | #include <unistd.h> |
85bd6331 | 21 | #include <setxid.h> |
d5ef95c8 | 22 | #include <linux/posix_types.h> |
6ddd37a4 | 23 | #include <kernel-features.h> |
313fed01 | 24 | |
0dee6738 | 25 | |
313fed01 | 26 | #ifdef __NR_setreuid32 |
313fed01 UD |
27 | # if __ASSUME_32BITUIDS == 0 |
28 | /* This variable is shared with all files that need to check for 32bit | |
29 | uids. */ | |
30 | extern int __libc_missing_32bit_uids; | |
31 | # endif | |
32 | #endif /* __NR_setreuid32 */ | |
33 | ||
0dee6738 UD |
34 | int |
35 | __setreuid (uid_t ruid, uid_t euid) | |
36 | { | |
2edb61e3 UD |
37 | int result; |
38 | ||
313fed01 | 39 | #if __ASSUME_32BITUIDS > 0 |
85bd6331 | 40 | result = INLINE_SETXID_SYSCALL (setreuid32, 2, ruid, euid); |
313fed01 | 41 | #else |
54c92465 | 42 | # ifdef __NR_setreuid32 |
cd090f71 | 43 | if (__libc_missing_32bit_uids <= 0) |
313fed01 | 44 | { |
313fed01 UD |
45 | int saved_errno = errno; |
46 | ||
85bd6331 | 47 | result = INLINE_SETXID_SYSCALL (setreuid32, 2, ruid, euid); |
313fed01 | 48 | |
2edb61e3 UD |
49 | if (result == 0) |
50 | goto out; | |
51 | if (errno != ENOSYS) | |
313fed01 UD |
52 | return result; |
53 | ||
54 | __set_errno (saved_errno); | |
55 | __libc_missing_32bit_uids = 1; | |
56 | } | |
57 | # endif /* __NR_setreuid32 */ | |
0482576e UD |
58 | if (((ruid + 1) > (uid_t) ((__kernel_uid_t) -1U)) |
59 | || ((euid + 1) > (uid_t) ((__kernel_uid_t) -1U))) | |
0dee6738 UD |
60 | { |
61 | __set_errno (EINVAL); | |
62 | return -1; | |
63 | } | |
64 | ||
85bd6331 | 65 | result = INLINE_SETXID_SYSCALL (setreuid, 2, ruid, euid); |
2edb61e3 UD |
66 | # ifdef __NR_setreuid32 |
67 | out: | |
68 | # endif | |
313fed01 | 69 | #endif |
2edb61e3 | 70 | |
2edb61e3 | 71 | return result; |
0dee6738 | 72 | } |
2edb61e3 | 73 | #ifndef __setreuid |
0dee6738 | 74 | weak_alias (__setreuid, setreuid) |
2edb61e3 | 75 | #endif |