31 lines
1.1 KiB
C
31 lines
1.1 KiB
C
/* File descriptor validity check for posix_spawn file actions.
|
|
Copyright (C) 2000-2019 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 "spawn_int.h"
|
|
|
|
#include <unistd.h>
|
|
|
|
bool
|
|
__spawn_valid_fd (int fd)
|
|
{
|
|
long maxfd = __sysconf (_SC_OPEN_MAX);
|
|
return __glibc_likely (fd >= 0)
|
|
&& (__glibc_unlikely (maxfd < 0) /* No limit set. */
|
|
|| __glibc_likely (fd < maxfd));
|
|
}
|