1 /* Copyright (C) 2000-2014 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
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.
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.
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/>. */
20 #include <sysdep-cancel.h> /* Must come before <fcntl.h>. */
24 #include <sys/syscall.h>
25 #include <kernel-features.h>
28 #ifdef __ASSUME_F_GETOWN_EX
29 # define miss_F_GETOWN_EX 0
31 static int miss_F_GETOWN_EX;
36 do_fcntl (int fd, int cmd, void *arg)
38 if (cmd != F_GETOWN || miss_F_GETOWN_EX)
39 return INLINE_SYSCALL (fcntl, 3, fd, cmd, arg);
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;
47 #ifndef __ASSUME_F_GETOWN_EX
48 if (INTERNAL_SYSCALL_ERRNO (res, err) == EINVAL)
50 res = INLINE_SYSCALL (fcntl, 3, fd, F_GETOWN, arg);
56 __set_errno (INTERNAL_SYSCALL_ERRNO (res, err));
61 #ifndef NO_CANCELLATION
63 __fcntl_nocancel (int fd, int cmd, ...)
69 arg = va_arg (ap, void *);
72 return do_fcntl (fd, cmd, arg);
78 __libc_fcntl (int fd, int cmd, ...)
84 arg = va_arg (ap, void *);
87 if (SINGLE_THREAD_P || cmd != F_SETLKW)
88 return do_fcntl (fd, cmd, arg);
90 int oldtype = LIBC_CANCEL_ASYNC ();
92 int result = do_fcntl (fd, cmd, arg);
94 LIBC_CANCEL_RESET (oldtype);
98 libc_hidden_def (__libc_fcntl)
100 weak_alias (__libc_fcntl, __fcntl)
101 libc_hidden_weak (__fcntl)
102 weak_alias (__libc_fcntl, fcntl)