1 files changed, 51 insertions, 0 deletions
diff --git a/Userland/Libraries/LibC/poll.cpp b/Userland/Libraries/LibC/poll.cpp
new file mode 100644
index 0000000000..437ea8243a
--- /dev/null
+++ b/Userland/Libraries/LibC/poll.cpp
@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
+ * All rights reserved.
+ *
+ * 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 AND CONTRIBUTORS "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 HOLDER 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 <Kernel/API/Syscall.h>
+#include <errno.h>
+#include <poll.h>
+#include <sys/time.h>
+
+extern "C" {
+
+int poll(pollfd* fds, nfds_t nfds, int timeout_ms)
+{
+    timespec timeout;
+    timespec* timeout_ts = &timeout;
+    if (timeout_ms < 0)
+        timeout_ts = nullptr;
+    else
+        timeout = { timeout_ms / 1000, (timeout_ms % 1000) * 1'000'000 };
+    return ppoll(fds, nfds, timeout_ts, nullptr);
+}
+
+int ppoll(pollfd* fds, nfds_t nfds, const timespec* timeout, const sigset_t* sigmask)
+{
+    Syscall::SC_poll_params params { fds, nfds, timeout, sigmask };
+    int rc = syscall(SC_poll, &params);
+    __RETURN_WITH_ERRNO(rc, rc, -1);
+}
+}