48 lines
1.3 KiB
C
48 lines
1.3 KiB
C
/* File descriptor related functions.
|
|
|
|
Copyright (C) 2019-2020 Free Software Foundation, Inc.
|
|
|
|
This file is part of the libiberty library.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program 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 General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin Street - Fifth Floor,
|
|
Boston, MA 02110-1301, USA. */
|
|
|
|
#include "config.h"
|
|
#include "ansidecl.h"
|
|
#include "libiberty.h"
|
|
|
|
#ifdef HAVE_FCNTL_H
|
|
#include <fcntl.h>
|
|
#endif
|
|
|
|
#if defined (_WIN32)
|
|
#define WIN32_LEAN_AND_MEAN
|
|
#include <windows.h> /* for GetFullPathName */
|
|
#endif
|
|
/* Return true when FD file descriptor exists. */
|
|
|
|
int
|
|
is_valid_fd (int fd)
|
|
{
|
|
#if defined(_WIN32)
|
|
HANDLE h = (HANDLE) _get_osfhandle (fd);
|
|
return h != (HANDLE) -1;
|
|
#elif defined(F_GETFD)
|
|
return fcntl (fd, F_GETFD) >= 0;
|
|
#else
|
|
return dup2 (fd, fd) < 0;
|
|
#endif
|
|
}
|