chore: import upstream snapshot with attribution

2026-07-13 12:22:33 +08:00
commit fc4fcbab58
1848 changed files with 472303 additions and 0 deletions
@@ -0,0 +1,61 @@
+#if canImport(Darwin)
+import Darwin
+#elseif canImport(Glibc)
+import Glibc
+#elseif canImport(Musl)
+import Musl
+#endif
+import Foundation
+
+enum PosixSpawnFileActionsCloseFrom {
+    enum CloseFromError: LocalizedError {
+        case descriptorEnumerationFailed(String)
+        case actionFailed(Int32)
+
+        var errorDescription: String? {
+            switch self {
+            case let .descriptorEnumerationFailed(details):
+                "Could not enumerate /proc/self/fd: \(details)"
+            case let .actionFailed(code):
+                "Could not configure descriptor cleanup: \(String(cString: strerror(code))) (\(code))"
+            }
+        }
+    }
+
+    static func descriptorsToClose(
+        startingAt minimumFileDescriptor: Int32,
+        contentsOfDirectory: (String) throws -> [String] = FileManager.default.contentsOfDirectory(atPath:)) throws
+        -> [Int32]
+    {
+        let entries: [String]
+        do {
+            entries = try contentsOfDirectory("/proc/self/fd")
+        } catch {
+            throw CloseFromError.descriptorEnumerationFailed(error.localizedDescription)
+        }
+        return entries.compactMap(Int32.init)
+            .filter { $0 >= minimumFileDescriptor }
+            .sorted()
+    }
+
+    #if canImport(Glibc) || canImport(Musl)
+    static func addCloseFrom(
+        _ fileActions: inout posix_spawn_file_actions_t,
+        startingAt minimumFileDescriptor: Int32) throws
+    {
+        #if canImport(Glibc)
+        try self.check(posix_spawn_file_actions_addclosefrom_np(&fileActions, minimumFileDescriptor))
+        #else
+        for descriptor in try self.descriptorsToClose(startingAt: minimumFileDescriptor) {
+            try self.check(posix_spawn_file_actions_addclose(&fileActions, descriptor))
+        }
+        #endif
+    }
+
+    private static func check(_ result: Int32) throws {
+        guard result == 0 else {
+            throw CloseFromError.actionFailed(result)
+        }
+    }
+    #endif
+}