mirror of
https://github.com/apple/container.git
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50 lines
1.7 KiB
Swift
50 lines
1.7 KiB
Swift
//===----------------------------------------------------------------------===//
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// Copyright © 2025 Apple Inc. and the Containerization project authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//===----------------------------------------------------------------------===//
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import Foundation
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/// A process reaper that returns exited processes along
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/// with their exit status.
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public struct Reaper {
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/// Process's pid and exit status.
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typealias Exit = (pid: Int32, status: Int32)
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/// Reap all pending processes and return the pid and exit status.
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public static func reap() -> [Int32: Int32] {
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var reaped = [Int32: Int32]()
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while true {
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guard let exit = wait() else {
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return reaped
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}
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reaped[exit.pid] = exit.status
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}
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return reaped
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}
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/// Returns the exit status of the last process that exited.
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/// nil is returned when no pending processes exist.
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private static func wait() -> Exit? {
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var rus = rusage()
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var ws = Int32()
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let pid = wait4(-1, &ws, WNOHANG, &rus)
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if pid <= 0 {
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return nil
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}
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return (pid: pid, status: Command.toExitStatus(ws))
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}
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}
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