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git.ipfire.org Git - thirdparty/glibc.git/blob - sysdeps/unix/sysv/linux/fcntl.c
1 /* Copyright (C) 2000-2018 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/>. */
21 #include <sysdep-cancel.h>
22 #include <not-cancel.h>
25 # define __NR_fcntl64 __NR_fcntl
28 #ifndef FCNTL_ADJUST_CMD
29 # define FCNTL_ADJUST_CMD(__cmd) __cmd
33 fcntl_common (int fd
, int cmd
, void *arg
)
37 INTERNAL_SYSCALL_DECL (err
);
38 struct f_owner_ex fex
;
39 int res
= INTERNAL_SYSCALL_CALL (fcntl64
, err
, fd
, F_GETOWN_EX
, &fex
);
40 if (!INTERNAL_SYSCALL_ERROR_P (res
, err
))
41 return fex
.type
== F_OWNER_GID
? -fex
.pid
: fex
.pid
;
43 return INLINE_SYSCALL_ERROR_RETURN_VALUE (INTERNAL_SYSCALL_ERRNO (res
,
47 return INLINE_SYSCALL_CALL (fcntl64
, fd
, cmd
, (void *) arg
);
51 __libc_fcntl (int fd
, int cmd
, ...)
57 arg
= va_arg (ap
, void *);
60 cmd
= FCNTL_ADJUST_CMD (cmd
);
62 if (cmd
== F_SETLKW
|| cmd
== F_SETLKW64
)
63 return SYSCALL_CANCEL (fcntl64
, fd
, cmd
, (void *) arg
);
65 return fcntl_common (fd
, cmd
, arg
);
67 libc_hidden_def (__libc_fcntl
)
71 __fcntl_nocancel (int fd
, int cmd
, ...)
77 arg
= va_arg (ap
, void *);
80 return fcntl_common (fd
, cmd
, arg
);
83 strong_alias (__libc_fcntl
, __fcntl_nocancel
)
85 libc_hidden_def (__fcntl_nocancel
)
87 weak_alias (__libc_fcntl
, __fcntl
)
88 libc_hidden_weak (__fcntl
)
89 weak_alias (__libc_fcntl
, fcntl
)