more cleanup

Author: weissi

Foundation/Process.swift

@@ -848,7 +848,8 @@ open class Process: NSObject {
         #else
         for fd in 3 ..< getdtablesize() {
             guard adddup2[fd] == nil &&
-                  !addclose.contains(fd) else {
+                  !addclose.contains(fd) &&
+                  fd != taskSocketPair[1] else {
                     continue // Do not double-close descriptors, or close those pertaining to Pipes or FileHandles we want inherited.
             }
             posix(_CFPosixSpawnFileActionsAddClose(fileActions, fd))

TestFoundation/TestProcess.swift

@@ -567,7 +567,7 @@ class TestProcess : XCTestCase {
 
     func test_fileDescriptorsAreNotInherited() throws {
         let task = Process()
-        let clonedFD = dup(1)
+        let someExtraFDs = [dup(1), dup(1), dup(1), dup(1), dup(1), dup(1), dup(1)]
         task.executableURL = xdgTestHelperURL()
         task.arguments = ["--print-open-file-descriptors"]
         task.standardInput = FileHandle.nullDevice
@@ -576,13 +576,20 @@ class TestProcess : XCTestCase {
         task.standardError = FileHandle.nullDevice
         XCTAssertNoThrow(try task.run())
 
-        try task.run()
         try stdoutPipe.fileHandleForWriting.close()
         let stdoutData = try stdoutPipe.fileHandleForReading.readToEnd()
         task.waitUntilExit()
-        print(String(decoding: stdoutData ?? Data(), as: Unicode.UTF8.self))
-        XCTAssertEqual("0\n1\n2\n", String(decoding: stdoutData ?? Data(), as: Unicode.UTF8.self))
-        close(clonedFD)
+        let stdoutString = String(decoding: stdoutData ?? Data(), as: Unicode.UTF8.self)
+        #if os(macOS)
+        XCTAssertEqual("0\n1\n2\n", stdoutString)
+        #else
+        // on Linux we should also have a /dev/urandom open as well as some socket that Process uses for something.
+        XCTAssert(stdoutString.utf8.starts(with: "0\n1\n2\n3\n".utf8))
+        XCTAssertEqual(stdoutString.components(separatedBy: "\n").count, 6, "\(stdoutString)")
+        #endif
+        for fd in someExtraFDs {
+            close(fd)
+        }
     }
 
     static var allTests: [(String, (TestProcess) -> () throws -> Void)] {
@@ -611,14 +618,14 @@ class TestProcess : XCTestCase {
             ("test_redirect_all_using_null", test_redirect_all_using_null),
             ("test_redirect_all_using_nil", test_redirect_all_using_nil),
             ("test_plutil", test_plutil),
-            ("test_fileDescriptorsAreNotInherited", test_fileDescriptorsAreNotInherited),
         ]
 
 #if !os(Windows)
         // Windows doesn't have signals
         tests += [
             ("test_interrupt", test_interrupt),
             ("test_suspend_resume", test_suspend_resume),
+            ("test_fileDescriptorsAreNotInherited", test_fileDescriptorsAreNotInherited),
         ]
 #endif
         return tests

TestFoundation/xdgTestHelper/main.swift

@@ -206,6 +206,7 @@ func cat(_ args: ArraySlice<String>.Iterator) {
     exit(exitCode)
 }
 
+#if !os(Windows)
 func printOpenFileDescriptors() {
     for fd in 0..<getdtablesize() {
         if fcntl(fd, F_GETFD) != -1 {
@@ -214,6 +215,7 @@ func printOpenFileDescriptors() {
     }
     exit(0)
 }
+#endif
 
 // -----
 
@@ -273,10 +275,10 @@ case "--nspathfor":
 #if !os(Windows)
 case "--signal-test":
     signalTest()
-#endif
 
 case "--print-open-file-descriptors":
     printOpenFileDescriptors()
+#endif
 
 default:
     fatalError("These arguments are not recognized. Only run this from a unit test.")