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d4697bc9 | 1 | /* Copyright (C) 2000-2014 Free Software Foundation, Inc. |
ce42435c 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 | |
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. | |
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 | |
12 | Lesser General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU Lesser General Public | |
59ba27a6 PE |
15 | License along with the GNU C Library; if not, see |
16 | <http://www.gnu.org/licenses/>. */ | |
ce42435c UD |
17 | |
18 | #include <assert.h> | |
19 | #include <errno.h> | |
d199bfb2 | 20 | #include <sysdep-cancel.h> /* Must come before <fcntl.h>. */ |
ce42435c UD |
21 | #include <fcntl.h> |
22 | #include <stdarg.h> | |
23 | ||
ce42435c | 24 | #include <sys/syscall.h> |
81c84bd9 UD |
25 | #include <kernel-features.h> |
26 | ||
27 | ||
28 | #ifdef __ASSUME_F_GETOWN_EX | |
29 | # define miss_F_GETOWN_EX 0 | |
30 | #else | |
31 | static int miss_F_GETOWN_EX; | |
32 | #endif | |
33 | ||
34 | ||
35 | static int | |
36 | do_fcntl (int fd, int cmd, void *arg) | |
37 | { | |
38 | if (cmd != F_GETOWN || miss_F_GETOWN_EX) | |
39 | return INLINE_SYSCALL (fcntl, 3, fd, cmd, arg); | |
40 | ||
41 | INTERNAL_SYSCALL_DECL (err); | |
42 | struct f_owner_ex fex; | |
43 | int res = INTERNAL_SYSCALL (fcntl, err, 3, fd, F_GETOWN_EX, &fex); | |
44 | if (!INTERNAL_SYSCALL_ERROR_P (res, err)) | |
45 | return fex.type == F_OWNER_GID ? -fex.pid : fex.pid; | |
46 | ||
47 | #ifndef __ASSUME_F_GETOWN_EX | |
48 | if (INTERNAL_SYSCALL_ERRNO (res, err) == EINVAL) | |
49 | { | |
50 | res = INLINE_SYSCALL (fcntl, 3, fd, F_GETOWN, arg); | |
51 | miss_F_GETOWN_EX = 1; | |
52 | return res; | |
53 | } | |
54 | #endif | |
55 | ||
56 | __set_errno (INTERNAL_SYSCALL_ERRNO (res, err)); | |
57 | return -1; | |
58 | } | |
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59 | |
60 | ||
06eee9f5 | 61 | #ifndef NO_CANCELLATION |
d199bfb2 | 62 | int |
76d0a2c4 | 63 | __fcntl_nocancel (int fd, int cmd, ...) |
ce42435c | 64 | { |
76d0a2c4 AJ |
65 | va_list ap; |
66 | void *arg; | |
67 | ||
68 | va_start (ap, cmd); | |
69 | arg = va_arg (ap, void *); | |
70 | va_end (ap); | |
71 | ||
81c84bd9 | 72 | return do_fcntl (fd, cmd, arg); |
ce42435c | 73 | } |
06eee9f5 | 74 | #endif |
ce42435c UD |
75 | |
76 | ||
77 | int | |
78 | __libc_fcntl (int fd, int cmd, ...) | |
79 | { | |
80 | va_list ap; | |
81 | void *arg; | |
82 | ||
83 | va_start (ap, cmd); | |
84 | arg = va_arg (ap, void *); | |
85 | va_end (ap); | |
86 | ||
87 | if (SINGLE_THREAD_P || cmd != F_SETLKW) | |
81c84bd9 | 88 | return do_fcntl (fd, cmd, arg); |
ce42435c UD |
89 | |
90 | int oldtype = LIBC_CANCEL_ASYNC (); | |
91 | ||
81c84bd9 | 92 | int result = do_fcntl (fd, cmd, arg); |
ce42435c UD |
93 | |
94 | LIBC_CANCEL_RESET (oldtype); | |
95 | ||
96 | return result; | |
97 | } | |
98 | libc_hidden_def (__libc_fcntl) | |
99 | ||
100 | weak_alias (__libc_fcntl, __fcntl) | |
101 | libc_hidden_weak (__fcntl) | |
102 | weak_alias (__libc_fcntl, fcntl) |