1 files changed, 101 insertions, 0 deletions
diff --git a/src/3rdparty/forkfd/forkfd_freebsd.c b/src/3rdparty/forkfd/forkfd_freebsd.c
new file mode 100644
index 0000000000..77ce3fcfad
--- /dev/null
+++ b/src/3rdparty/forkfd/forkfd_freebsd.c
@@ -0,0 +1,101 @@
+/****************************************************************************
+**
+** Copyright (C) 2019 Intel Corporation.
+**
+** Permission is hereby granted, free of charge, to any person obtaining a copy
+** of this software and associated documentation files (the "Software"), to deal
+** in the Software without restriction, including without limitation the rights
+** to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+** copies of the Software, and to permit persons to whom the Software is
+** furnished to do so, subject to the following conditions:
+**
+** The above copyright notice and this permission notice shall be included in
+** all copies or substantial portions of the Software.
+**
+** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+** IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+** FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+** AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+** LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+** OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+** THE SOFTWARE.
+**
+****************************************************************************/
+
+#include "forkfd.h"
+
+#include <sys/types.h>
+#include <sys/procdesc.h>
+
+#include "forkfd_atomic.h"
+
+#if __FreeBSD__ >= 10
+/* On FreeBSD 10, PROCDESC was enabled by default. On v11, it's not an option
+ * anymore and can't be disabled. */
+static ffd_atomic_int system_forkfd_state = FFD_ATOMIC_INIT(1);
+#else
+static ffd_atomic_int system_forkfd_state = FFD_ATOMIC_INIT(0);
+#endif
+
+int system_has_forkfd()
+{
+    return ffd_atomic_load(&system_forkfd_state, FFD_ATOMIC_RELAXED) > 0;
+}
+
+int system_forkfd(int flags, pid_t *ppid, int *system)
+{
+    int ret;
+    pid_t pid;
+
+    int state = ffd_atomic_load(&system_forkfd_state, FFD_ATOMIC_RELAXED);
+    *system = 0;
+    if (state < 0)
+        return -1;
+
+    pid = pdfork(&ret, PD_DAEMON);
+#  if __FreeBSD__ == 9
+    if (state == 0 && pid != 0) {
+        /* Parent process: remember whether PROCDESC was compiled into the kernel */
+        state = (pid == -1 && errno == ENOSYS) ? -1 : 1;
+        ffd_atomic_store(&system_forkfd_state, state, FFD_ATOMIC_RELAXED);
+    }
+    if (state < 0)
+        return -1;
+#  endif
+    *system = 1;
+    if (__builtin_expect(pid == -1, 0))
+        return -1;
+
+    if (pid == 0) {
+        /* child process */
+        return FFD_CHILD_PROCESS;
+    }
+
+    /* parent process */
+    if (flags & FFD_CLOEXEC)
+        fcntl(ret, F_SETFD, FD_CLOEXEC);
+    if (flags & FFD_NONBLOCK)
+        fcntl(ret, F_SETFL, fcntl(ret, F_GETFL) | O_NONBLOCK);
+    if (ppid)
+        *ppid = pid;
+    return ret;
+}
+
+int system_forkfd_wait(int ffd, struct forkfd_info *info, struct rusage *rusage)
+{
+    pid_t pid;
+    int status;
+    int options = WEXITED;
+
+    int ret = pdgetpid(ffd, &pid);
+    if (ret == -1)
+        return ret;
+    ret = fcntl(ffd, F_GETFL);
+    if (ret == -1)
+        return ret;
+    options |= (ret & O_NONBLOCK) ? WNOHANG : 0;
+    ret = wait4(pid, &status, options, rusage);
+    if (ret != -1 && info)
+        convertStatusToForkfdInfo(status, info);
+    return ret == -1 ? -1 : 0;
+}