v29.4-roots.2 · Commit 2: [PATCH 02/21] 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.
Scroll the code area horizontally to read long lines. Before is on the left; after is on the right. Unified view fits narrow screens more easily.
src/util/subprocess.cpp
ADDED
|
@@ -0,0 +1,55 @@
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 1 |
+
// Copyright (c) 2025-present The Bitcoin Roots developers
|
| 2 |
+
// Distributed under the MIT software license, see the accompanying
|
| 3 |
+
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
|
| 4 |
+
|
| 5 |
+
#include <bitcoin-build-config.h> // IWYU pragma: keep
|
| 6 |
+
|
| 7 |
+
#if !((defined _MSC_VER) || (defined __MINGW32__))
|
| 8 |
+
|
| 9 |
+
#if HAVE_CLOSE_RANGE_LINUX
|
| 10 |
+
#ifndef _GNU_SOURCE
|
| 11 |
+
#define _GNU_SOURCE
|
| 12 |
+
#endif
|
| 13 |
+
#include <linux/close_range.h>
|
| 14 |
+
#endif
|
| 15 |
+
|
| 16 |
+
#include <limits.h>
|
| 17 |
+
#include <sys/types.h>
|
| 18 |
+
#include <sys/time.h>
|
| 19 |
+
#include <sys/resource.h>
|
| 20 |
+
#include <unistd.h>
|
| 21 |
+
|
| 22 |
+
namespace subprocess {
|
| 23 |
+
namespace detail {
|
| 24 |
+
|
| 25 |
+
void subprocess_close_all_fds(const int except_fd)
|
| 26 |
+
{
|
| 27 |
+
#if HAVE_CLOSE_RANGE_GENERIC || HAVE_CLOSE_RANGE_LINUX
|
| 28 |
+
if (except_fd < 3) {
|
| 29 |
+
if (!close_range(3, UINT_MAX, 0)) return;
|
| 30 |
+
} else if (except_fd == 3) {
|
| 31 |
+
if (!close_range(4, UINT_MAX, 0)) return;
|
| 32 |
+
} else {
|
| 33 |
+
if (!(close_range(3, except_fd - 1, 0) || close_range(except_fd + 1, UINT_MAX, 0))) return;
|
| 34 |
+
}
|
| 35 |
+
#endif
|
| 36 |
+
|
| 37 |
+
unsigned int max_fd;
|
| 38 |
+
|
| 39 |
+
struct rlimit limit_fds;
|
| 40 |
+
if (getrlimit(RLIMIT_NOFILE, &limit_fds) == 0 && limit_fds.rlim_cur < INT_MAX) {
|
| 41 |
+
max_fd = limit_fds.rlim_cur;
|
| 42 |
+
} else {
|
| 43 |
+
max_fd = INT_MAX;
|
| 44 |
+
}
|
| 45 |
+
|
| 46 |
+
for (int fd = max_fd; fd > 2; --fd) {
|
| 47 |
+
if (fd == except_fd) continue;
|
| 48 |
+
close(fd);
|
| 49 |
+
}
|
| 50 |
+
}
|
| 51 |
+
|
| 52 |
+
} // namespace detail
|
| 53 |
+
} // namespace subprocess
|
| 54 |
+
|
| 55 |
+
#endif // !((defined _MSC_VER) || (defined __MINGW32__))
|