init

core/src/main/subsys_call.cpp

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+
+#include "iostream"
+#include "fstream"
+#include <boost/json.hpp>
+#include "tt/Mq.h"
+#include "tt/Pipe.h"
+#include "main/subsys_call.hh"
+
+namespace qing {
+namespace subsys_call {
+
+
+/*-------------------------------------------------------------------------*/
+
+
+/* -------- 向pmc的消息队列发送启动命令并且从管道接收回复 -------- */
+std::string send_start_and_recv_pipe(const std::string& name_mq, const std::string& exec)
+try {
+
+	auto name_pipe = std::to_string(getpid());
+	auto mq = Mq(name_mq, 2048, 100, Mq::USER); /* 放在这里避免管道文件的残留 */
+
+	boost::json::object obj;
+	obj["pipe"] = name_pipe;
+	obj["type"] = "exec";
+	obj["exec"] = exec;
+	auto jsonstr = boost::json::serialize(obj);
+
+
+	auto pipe = Pipe(name_pipe, Pipe::CREATOR); /* FIXME: 创建管道文件到/tmp下面 */
+	if (!pipe.openForRead(true)) {
+		std::cerr << "Failed to open pipe" << std::endl;
+		return "ERR";
+	}
+
+	mq.send(jsonstr);
+	if (!pipe.waitForRead(1, 0)) {
+		std::cerr << "Pipe Read Timeout" << std::endl;
+		return "ERR";
+	}
+
+	std::string res = "";
+	if (pipe.readPipe(&res) < 0) {
+		std::cerr << "Failed to read pipe" << std::endl;
+		return "ERR";
+	}
+
+	return res;
+}
+
+//catch (boost::interprocess::interprocess_exception &exp)  {
+//	std::cerr << "Target Pmc Is Not Found" << std::endl;
+//	return 1;
+//}
+
+catch (std::exception &exp) {
+    std::cerr << "Exception at:   send_start_and_recv_pipe()" << std::endl;
+    std::cerr << "Exception type: " << typeid(exp).name() << std::endl;
+    std::cerr << "Exception info: " << exp.what() << std::endl;
+    return "ERR";
+}
+
+
+
+/* -------- 向目标子系统发送列举命令并收集结果 -------- */
+std::string send_list_and_recv_pipe(const std::string& name_mq)
+try {
+
+	auto name_pipe = std::to_string(getpid());
+	auto mq = Mq(name_mq, 2048, 100, Mq::USER);
+
+	boost::json::object obj;
+	obj["pipe"] = name_pipe;
+	obj["type"] = "list";
+	auto jsonstr = boost::json::serialize(obj);
+	auto pipe = Pipe(name_pipe, Pipe::CREATOR);
+
+	if (!pipe.openForRead(true)) {
+		std::cerr << "Failed to open pipe" << std::endl;
+		return "ERR";
+	}
+
+
+	mq.send(jsonstr);
+	if (!pipe.waitForRead(1, 0)) {
+		std::cerr << "Pipe Read Timeout" << std::endl;
+		return "ERR";
+	}
+
+	std::string res = "";
+	if (pipe.readPipe(&res) < 0) {
+		std::cerr << "Failed to read pipe" << std::endl;
+		return "ERR";
+	}
+
+
+	return res;
+
+}
+
+//catch (boost::interprocess::interprocess_exception &exp)  {
+//	std::cerr << "Target Pmc Is Not Found" << std::endl;
+//	return 1;
+//}
+
+catch (std::exception &exp) {
+    std::cerr << "Exception at:   send_list_and_recv_pipe()" << std::endl;
+    std::cerr << "Exception type: " << typeid(exp).name() << std::endl;
+    std::cerr << "Exception info: " << exp.what() << std::endl;
+    return "ERR";
+}
+
+/* -------- 删除操作调用 -------- */
+std::string send_kill_and_recv_pipe(const std::string& name_mq, const int kill)
+try{
+
+	auto name_pipe = std::to_string(getpid());
+	auto mq = Mq(name_mq, 2048, 100, Mq::USER);
+
+	boost::json::object obj;
+	obj["pipe"] = name_pipe;
+	obj["type"] = "kill";
+	obj["kill"] = kill;
+	auto jsonstr = boost::json::serialize(obj);
+
+	auto pipe = Pipe(name_pipe, Pipe::CREATOR);
+	if (!pipe.openForRead(true)) {
+		std::cerr << "Failed to open pipe" << std::endl;
+		return "ERR";
+	}
+
+	mq.send(jsonstr);
+	if (!pipe.waitForRead(1, 0)) {
+		std::cerr << "Pipe Read Timeout" << std::endl;
+		return "ERR";
+	}
+
+	std::string res = "";
+	if (pipe.readPipe(&res) < 0) {
+		std::cerr << "Failed to read pipe" << std::endl;
+		return "ERR";
+	}
+	else return res;
+
+}
+
+/* 没有打开目标子系统的消息队列时，会触发这个异常
+ * 但是实际上这里捕获的是进程间通信通用异常（旧版） */
+//catch (boost::interprocess::interprocess_exception &exp)  {
+//	std::cerr << "Target Pmc Is Not Found" << std::endl;
+//	return 1;
+//}
+
+/* 这些函数抛出异常后可能导致管道文件残留 */
+catch (std::exception &exp) {
+    std::cerr << "Exception at:   send_kill_and_recv_pipe()" << std::endl;
+    std::cerr << "Exception type: " << typeid(exp).name() << std::endl;
+    std::cerr << "Exception info: " << exp.what() << std::endl;
+    return "ERR";
+}
+
+}
+}