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68 lines
1.5 KiB
68 lines
1.5 KiB
#include <iostream>
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#include <event2/event.h>
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#include <string.h>
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#include <thread>
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#ifdef _WIN32
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#else
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#include <signal.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#endif // !_WIN32
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using namespace std;
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void read_file(evutil_socket_t fd,short event,void *arg){
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char buf[1024] = {0};
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int len = read(fd,buf,sizeof(buf) - 1);
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if(len > 0){
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cout << buf << endl; // 当有用户登录就会把 该信息打印出来
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}else {
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cout << "." << endl;
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this_thread::sleep_for(500ms);
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}
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}
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int main(int agrc,char** agrv){
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#ifdef _WIN32
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//初始化socket库
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WSADATA wsa;
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WSAStartup(MAKEWORD(2, 2), &wsa);
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#else
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if (signal(SIGPIPE, SIG_IGN) == SIG_ERR) { //忽略管道信号，发送数据给已关闭的socket，会飞掉！
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return 1;
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}
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#endif
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event_config* conf = event_config_new();
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event_config_require_features(conf,EV_FEATURE_FDS);
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event_base *base = event_base_new_with_config(conf);
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event_config_free(conf);
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if(!base){
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cerr << "event_base_new_with_config failed" <<endl;
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}
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int sock = open("/var/log/auth.log",O_RDONLY|O_NONBLOCK,0);
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if(sock < 0){
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cerr << "/var/log/auth.log open failde" << endl;
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}
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lseek(sock,0,SEEK_END);
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//监听文件数据
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event* fev = event_new(base,sock,EV_READ|EV_PERSIST ,read_file,0);
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event_add(fev,NULL);
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//进入事件主循环
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event_base_dispatch(base);
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event_free(fev);
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event_base_free(base);
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return 0;
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}
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