Permalink
Cannot retrieve contributors at this time
Name already in use
A tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Are you sure you want to create this branch?
glibc/sysdeps/unix/sysv/linux/fcntl.c
Go to fileThis commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
85 lines (63 sloc)
2.04 KB
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
/* Copyright (C) 2000-2016 Free Software Foundation, Inc. | |
This file is part of the GNU C Library. | |
The GNU C Library is free software; you can redistribute it and/or | |
modify it under the terms of the GNU Lesser General Public | |
License as published by the Free Software Foundation; either | |
version 2.1 of the License, or (at your option) any later version. | |
The GNU C Library is distributed in the hope that it will be useful, | |
but WITHOUT ANY WARRANTY; without even the implied warranty of | |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
Lesser General Public License for more details. | |
You should have received a copy of the GNU Lesser General Public | |
License along with the GNU C Library; if not, see | |
<http://www.gnu.org/licenses/>. */ | |
#include <assert.h> | |
#include <errno.h> | |
#include <sysdep-cancel.h> /* Must come before <fcntl.h>. */ | |
#include <fcntl.h> | |
#include <stdarg.h> | |
#include <sys/syscall.h> | |
static int | |
do_fcntl (int fd, int cmd, void *arg) | |
{ | |
if (cmd != F_GETOWN) | |
return INLINE_SYSCALL (fcntl, 3, fd, cmd, arg); | |
INTERNAL_SYSCALL_DECL (err); | |
struct f_owner_ex fex; | |
int res = INTERNAL_SYSCALL (fcntl, err, 3, fd, F_GETOWN_EX, &fex); | |
if (!INTERNAL_SYSCALL_ERROR_P (res, err)) | |
return fex.type == F_OWNER_GID ? -fex.pid : fex.pid; | |
return INLINE_SYSCALL_ERROR_RETURN_VALUE (INTERNAL_SYSCALL_ERRNO (res, | |
err)); | |
} | |
#ifndef NO_CANCELLATION | |
int | |
__fcntl_nocancel (int fd, int cmd, ...) | |
{ | |
va_list ap; | |
void *arg; | |
va_start (ap, cmd); | |
arg = va_arg (ap, void *); | |
va_end (ap); | |
return do_fcntl (fd, cmd, arg); | |
} | |
#endif | |
int | |
__libc_fcntl (int fd, int cmd, ...) | |
{ | |
va_list ap; | |
void *arg; | |
va_start (ap, cmd); | |
arg = va_arg (ap, void *); | |
va_end (ap); | |
if (SINGLE_THREAD_P || cmd != F_SETLKW) | |
return do_fcntl (fd, cmd, arg); | |
int oldtype = LIBC_CANCEL_ASYNC (); | |
int result = do_fcntl (fd, cmd, arg); | |
LIBC_CANCEL_RESET (oldtype); | |
return result; | |
} | |
libc_hidden_def (__libc_fcntl) | |
weak_alias (__libc_fcntl, __fcntl) | |
libc_hidden_weak (__fcntl) | |
weak_alias (__libc_fcntl, fcntl) |