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diff --git a/src/shrpx_exec.h b/src/shrpx_exec.h
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+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2016 Tatsuhiro Tsujikawa
+ *
+ * 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.
+ */
+#ifndef SHRPX_EXEC_H
+#define SHRPX_EXEC_H
+
+#include "unistd.h"
+
+namespace shrpx {
+
+struct Process {
+  pid_t pid;
+  // fd to read from process
+  int rfd;
+};
+
+// Executes command |argv| after forking current process.  The command
+// should not expect to read from stdin.  Parent process can read the
+// stdout from command using proc.rfd.  On success, this function
+// returns 0, and process information is stored in |proc|.  Otherwise,
+// returns -1.
+int exec_read_command(Process &proc, char *const argv[]);
+
+} // namespace shrpx
+
+#endif // SHRPX_EXEC_H