1 files changed, 67 insertions, 0 deletions
diff --git a/Source/WTF/wtf/UniStdExtras.cpp b/Source/WTF/wtf/UniStdExtras.cpp
new file mode 100644
index 000000000..4e33576e6
--- /dev/null
+++ b/Source/WTF/wtf/UniStdExtras.cpp
@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2016 Igalia S.L.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "UniStdExtras.h"
+
+#include <fcntl.h>
+
+namespace WTF {
+
+bool setCloseOnExec(int fileDescriptor)
+{
+    int returnValue = -1;
+    do {
+        int flags = fcntl(fileDescriptor, F_GETFD);
+        if (flags != -1)
+            returnValue = fcntl(fileDescriptor, F_SETFD, flags | FD_CLOEXEC);
+    } while (returnValue == -1 && errno == EINTR);
+
+    return returnValue != -1;
+}
+
+int dupCloseOnExec(int fileDescriptor)
+{
+    int duplicatedFileDescriptor = -1;
+#ifdef F_DUPFD_CLOEXEC
+    while ((duplicatedFileDescriptor = fcntl(fileDescriptor, F_DUPFD_CLOEXEC, 0)) == -1 && errno == EINTR) { }
+    if (duplicatedFileDescriptor != -1)
+        return duplicatedFileDescriptor;
+
+#endif
+
+    while ((duplicatedFileDescriptor = dup(fileDescriptor)) == -1 && errno == EINTR) { }
+    if (duplicatedFileDescriptor == -1)
+        return -1;
+
+    if (!setCloseOnExec(duplicatedFileDescriptor)) {
+        closeWithRetry(duplicatedFileDescriptor);
+        return -1;
+    }
+
+    return duplicatedFileDescriptor;
+}
+
+} // namespace WTF