ubuntu下 C/C++程序读取设置环境变量-Toy模板网

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设置环境变量很简单比如：

export QMCY_LOCAL_PORT=8888

追加的话

export QMCY_LOCAL_PORT=$QMCY_LOCAL_PORT:8000

可以通过echo回显

ubuntu下 C/C++程序读取设置环境变量,linux,运维,服务器

读取的话 main函数多加一个env参数一个字符串数组然后遍历这个数组即可

ubuntu下 C/C++程序读取设置环境变量,linux,运维,服务器

使用的时候如下：文章来源地址https://www.toymoban.com/news/detail-537574.html

bool QMCY_APP::Init(std::string &config_file, char *env[])
{
	char *file_content = nullptr;
	int size = 0;

	unsigned seed = time(0);
	srand(seed);


	if(config_file.empty())
	{
		std::cout<<"config file is null"<<std::endl;
		return false;
	}
	
	FILE * fp = fopen(config_file.c_str(),"r");
	if(fp == NULL)
	{
		return false;
	}

	fseek(fp, 0, SEEK_END);
	size = ftell(fp);


	file_content = (char *)malloc(size+1);
	if(file_content)
	{
		fseek(fp, 0, SEEK_SET);
		fread(file_content,size,1,fp);

		ReadConfig(file_content);
		
		free(file_content);

	}
	
	fclose(fp);	




	int i = 0;
	char key[20] ={0},value[30]={0};
	
	for(; env[i]; i++){
		std::string temp = env[i];

		std::size_t found = temp.find(m_basic_info.server_ip_name);
		if(found!= std::string::npos)
		{
			int converted = sscanf(temp.c_str(),"%[^=]=%s",key,value);
			if(converted == 2)
			{
				m_basic_info.server_ip = value;				
			}
			
		}


		found = temp.find(m_basic_info.server_port_name);
		if(found!= std::string::npos)
		{
			int converted = sscanf(temp.c_str(),"%[^=]=%s",key,value);
			if(converted == 2)
			{
				m_basic_info.server_port = atoi(value);
			}

		}


		found = temp.find(m_basic_info.local_port_name);
		if(found!= std::string::npos)
		{
			int converted = sscanf(temp.c_str(),"%[^=]=%s",key,value);
			if(converted == 2)
			{
				//std::cout<<"local port :"<<key<<" :"<<value<<std::endl;
				m_basic_info.local_port = atoi(value);				
			}
		}


		
	}


	if(m_basic_info.local_port<1024|| m_basic_info.local_port >65535 )
	{
		m_basic_info.local_port = 8888;
	}

	if(m_basic_info.server_port<1024|| m_basic_info.server_port >65535 )
	{
		m_basic_info.server_port = 8888;
	}



	zlog_info(g_zlog,"APP run info:[server ip = %s,server port=%d, local port = %d]",m_basic_info.server_ip.c_str(),m_basic_info.server_port,m_basic_info.local_port);


	std::string posturi = "http://";
	posturi.append(m_basic_info.server_ip);
	posturi.append(":");	
	posturi.append(std::to_string(m_basic_info.server_port));	


	m_http_client = std::make_shared<httplib::Client>(posturi);

	//m_log = HANA<LOG>::GetHANA();

	m_thread_pool = std::make_shared<BlackBox>(MAX_THREADS,MAX_QUEUE_SIZE);
	m_thread_pool->init();


	
	//m_queue = std::make_shared<BlockQueue<LED_MSG>>(30);

	m_inner_queue = std::make_shared<BlockQueue<INNER_MSG>>(30);

	return true;	
		
}

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