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6ddd37a4 | 1 | /* Copyright (C) 2000, 2003, 2006 Free Software Foundation, Inc. |
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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 | |
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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. | |
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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. |
313fed01 | 13 | |
41bdb6e2 | 14 | You should have received a copy of the GNU Lesser General Public |
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15 | License along with the GNU C Library; if not, see |
16 | <http://www.gnu.org/licenses/>. */ | |
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17 | |
18 | #include <errno.h> | |
19 | #include <unistd.h> | |
20 | ||
21 | #include <sysdep.h> | |
22 | #include <sys/syscall.h> | |
23 | ||
24 | #include <linux/posix_types.h> | |
6ddd37a4 | 25 | #include <kernel-features.h> |
313fed01 | 26 | |
313fed01 | 27 | #ifdef __NR_fchown32 |
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28 | # if __ASSUME_32BITUIDS == 0 |
29 | /* This variable is shared with all files that need to check for 32bit | |
30 | uids. */ | |
31 | extern int __libc_missing_32bit_uids; | |
32 | # endif | |
33 | #endif /* __NR_fchown32 */ | |
34 | ||
35 | int | |
36 | __fchown (int fd, uid_t owner, gid_t group) | |
37 | { | |
38 | #if __ASSUME_32BITUIDS > 0 | |
39 | return INLINE_SYSCALL (fchown32, 3, fd, owner, group); | |
40 | #else | |
41 | # ifdef __NR_fchown32 | |
cd090f71 | 42 | if (__libc_missing_32bit_uids <= 0) |
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43 | { |
44 | int result; | |
45 | int saved_errno = errno; | |
46 | ||
47 | result = INLINE_SYSCALL (fchown32, 3, fd, owner, group); | |
48 | if (result == 0 || errno != ENOSYS) | |
49 | return result; | |
50 | ||
51 | __set_errno (saved_errno); | |
52 | __libc_missing_32bit_uids = 1; | |
53 | } | |
54 | # endif /* __NR_fchown32 */ | |
55 | ||
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56 | if (((owner + 1) > (uid_t) ((__kernel_uid_t) -1U)) |
57 | || ((group + 1) > (gid_t) ((__kernel_gid_t) -1U))) | |
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58 | { |
59 | __set_errno (EINVAL); | |
60 | return -1; | |
61 | } | |
62 | ||
63 | return INLINE_SYSCALL (fchown, 3, fd, owner, group); | |
64 | #endif | |
65 | } | |
66 | ||
67 | weak_alias (__fchown, fchown) |