1 | /* Copyright (C) 2000-2017 Free Software Foundation, Inc. |
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 |
15 | License along with the GNU C Library; if not, see |
16 | <http://www.gnu.org/licenses/>. */ |
17 | |
18 | #include <fcntl.h> |
19 | #include <stdarg.h> |
20 | #include <errno.h> |
21 | #include <sysdep-cancel.h> |
22 | |
23 | #ifndef __NR_fcntl64 |
24 | # define __NR_fcntl64 __NR_fcntl |
25 | #endif |
26 | |
27 | #ifndef FCNTL_ADJUST_CMD |
28 | # define FCNTL_ADJUST_CMD(__cmd) __cmd |
29 | #endif |
30 | |
31 | static int |
32 | fcntl_common (int fd, int cmd, void *arg) |
33 | { |
34 | if (cmd == F_GETOWN) |
35 | { |
36 | INTERNAL_SYSCALL_DECL (err); |
37 | struct f_owner_ex fex; |
38 | int res = INTERNAL_SYSCALL_CALL (fcntl64, err, fd, F_GETOWN_EX, &fex); |
39 | if (!INTERNAL_SYSCALL_ERROR_P (res, err)) |
40 | return fex.type == F_OWNER_GID ? -fex.pid : fex.pid; |
41 | |
42 | return INLINE_SYSCALL_ERROR_RETURN_VALUE (INTERNAL_SYSCALL_ERRNO (res, |
43 | err)); |
44 | } |
45 | |
46 | return INLINE_SYSCALL_CALL (fcntl64, fd, cmd, (void *) arg); |
47 | } |
48 | |
49 | #ifndef NO_CANCELLATION |
50 | int |
51 | __fcntl_nocancel (int fd, int cmd, ...) |
52 | { |
53 | va_list ap; |
54 | void *arg; |
55 | |
56 | va_start (ap, cmd); |
57 | arg = va_arg (ap, void *); |
58 | va_end (ap); |
59 | |
60 | return fcntl_common (fd, cmd, arg); |
61 | } |
62 | #endif |
63 | |
64 | int |
65 | __libc_fcntl (int fd, int cmd, ...) |
66 | { |
67 | va_list ap; |
68 | void *arg; |
69 | |
70 | va_start (ap, cmd); |
71 | arg = va_arg (ap, void *); |
72 | va_end (ap); |
73 | |
74 | cmd = FCNTL_ADJUST_CMD (cmd); |
75 | |
76 | if (cmd == F_SETLKW || cmd == F_SETLKW64) |
77 | return SYSCALL_CANCEL (fcntl64, fd, cmd, (void *) arg); |
78 | |
79 | return fcntl_common (fd, cmd, arg); |
80 | } |
81 | libc_hidden_def (__libc_fcntl) |
82 | |
83 | weak_alias (__libc_fcntl, __fcntl) |
84 | libc_hidden_weak (__fcntl) |
85 | weak_alias (__libc_fcntl, fcntl) |
86 | |