1 files changed, 93 insertions, 0 deletions
diff --git a/web/server/h2o/libh2o/deps/cloexec/cloexec.c b/web/server/h2o/libh2o/deps/cloexec/cloexec.c
new file mode 100644
index 00000000..bc67c395
--- /dev/null
+++ b/web/server/h2o/libh2o/deps/cloexec/cloexec.c
@@ -0,0 +1,93 @@
+/*
+ * Copyright (c) 2015 DeNA Co., Ltd.
+ *
+ * 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 <fcntl.h>
+#include "cloexec.h"
+
+pthread_mutex_t cloexec_mutex = PTHREAD_MUTEX_INITIALIZER;
+
+static int set_cloexec(int fd)
+{
+    return fcntl(fd, F_SETFD, FD_CLOEXEC) != -1 ? 0 : -1;
+}
+
+/*
+ * note: the socket must be in non-blocking mode, or the call might block while the mutex is being locked
+ */
+int cloexec_accept(int socket, struct sockaddr *addr, socklen_t *addrlen)
+{
+    int fd = -1;
+    pthread_mutex_lock(&cloexec_mutex);
+
+    if ((fd = accept(socket, addr, addrlen)) == -1)
+        goto Exit;
+    if (set_cloexec(fd) != 0) {
+        close(fd);
+        fd = -1;
+        goto Exit;
+    }
+
+Exit:
+    pthread_mutex_unlock(&cloexec_mutex);
+    return fd;
+}
+
+int cloexec_pipe(int fds[2])
+{
+#ifdef __linux__
+    return pipe2(fds, O_CLOEXEC);
+#else
+    int ret = -1;
+    pthread_mutex_lock(&cloexec_mutex);
+
+    if (pipe(fds) != 0)
+        goto Exit;
+    if (set_cloexec(fds[0]) != 0 || set_cloexec(fds[1]) != 0)
+        goto Exit;
+    ret = 0;
+
+Exit:
+    pthread_mutex_unlock(&cloexec_mutex);
+    return ret;
+#endif
+}
+
+int cloexec_socket(int domain, int type, int protocol)
+{
+#ifdef __linux__
+    return socket(domain, type | SOCK_CLOEXEC, protocol);
+#else
+    int fd = -1;
+    pthread_mutex_lock(&cloexec_mutex);
+
+    if ((fd = socket(domain, type, protocol)) == -1)
+        goto Exit;
+    if (set_cloexec(fd) != 0) {
+        close(fd);
+        fd = -1;
+        goto Exit;
+    }
+
+Exit:
+    pthread_mutex_unlock(&cloexec_mutex);
+    return fd;
+#endif
+}