mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-24 05:50:14 +00:00
86 lines
2.0 KiB
C
86 lines
2.0 KiB
C
/* 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)
|