v29.4-roots.1 · Commit 2: [PATCH 02/13] runtime: preserve shared operator controls
src/util/subprocess.cpp
Before: /dev/null · After: src/util/subprocess.cpp
File metadata
new file mode 100644 index 0000000000000000000000000000000000000000..c3b54c96c4e874f75dad5e26768eded8f49110d7
Download original patch · Release notes
Diff rows 1–55 of 55. Line numbers refer to the original before/after files.
+ Added− RemovedUnmarked lines are context.
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src/util/subprocess.cpp
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// Copyright (c) 2025-present The Bitcoin Roots developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#include <bitcoin-build-config.h> // IWYU pragma: keep
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#if !((defined _MSC_VER) || (defined __MINGW32__))
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#if HAVE_CLOSE_RANGE_LINUX
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#ifndef _GNU_SOURCE
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#define _GNU_SOURCE
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#endif
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#include <linux/close_range.h>
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#endif
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#include <limits.h>
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#include <sys/types.h>
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#include <sys/time.h>
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#include <sys/resource.h>
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#include <unistd.h>
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namespace subprocess {
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namespace detail {
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void subprocess_close_all_fds(const int except_fd)
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{
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#if HAVE_CLOSE_RANGE_GENERIC || HAVE_CLOSE_RANGE_LINUX
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if (except_fd < 3) {
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if (!close_range(3, UINT_MAX, 0)) return;
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} else if (except_fd == 3) {
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if (!close_range(4, UINT_MAX, 0)) return;
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} else {
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if (!(close_range(3, except_fd - 1, 0) || close_range(except_fd + 1, UINT_MAX, 0))) return;
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}
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#endif
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unsigned int max_fd;
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struct rlimit limit_fds;
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if (getrlimit(RLIMIT_NOFILE, &limit_fds) == 0 && limit_fds.rlim_cur < INT_MAX) {
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max_fd = limit_fds.rlim_cur;
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} else {
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max_fd = INT_MAX;
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}
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for (int fd = max_fd; fd > 2; --fd) {
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if (fd == except_fd) continue;
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close(fd);
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}
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}
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} // namespace detail
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} // namespace subprocess
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#endif // !((defined _MSC_VER) || (defined __MINGW32__))
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