31 lines
1.1 KiB
C
31 lines
1.1 KiB
C
/* File descriptor validity check for posix_spawn file actions.
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Copyright (C) 2000-2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include "spawn_int.h"
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#include <unistd.h>
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bool
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__spawn_valid_fd (int fd)
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{
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long maxfd = __sysconf (_SC_OPEN_MAX);
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return __glibc_likely (fd >= 0)
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&& (__glibc_unlikely (maxfd < 0) /* No limit set. */
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|| __glibc_likely (fd < maxfd));
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}
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