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ZLMediaKit/server/System.cpp

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统一添加bom
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/*
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* MIT License
*
* Copyright (c) 2016-2019 xiongziliang <771730766@qq.com>
*
* This file is part of ZLMediaKit(https://github.com/xiongziliang/ZLMediaKit).
*
* 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.
*/
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#include "System.h"
#include <stdlib.h>
#include <signal.h>
#include <arpa/inet.h>
#include <limits.h>
#include <sys/resource.h>
#include <unistd.h>
#include <sys/wait.h>
#include <execinfo.h>
#include <map>
#include <string>
#include <iostream>
#include "Util/mini.h"
#include "Util/util.h"
#include "Util/logger.h"
#include "Util/onceToken.h"
#include "Util/NoticeCenter.h"
#include "System.h"
#include "Util/uv_errno.h"
#include "Util/CMD.h"
#include "Util/MD5.h"
using namespace toolkit;
const int MAX_STACK_FRAMES = 128;
#define BroadcastOnCrashDumpArgs int &sig,const vector<vector<string> > &stack
const char kBroadcastOnCrashDump[] = "kBroadcastOnCrashDump";
//#if defined(__MACH__) || defined(__APPLE__)
//#define TEST_LINUX
//#endif
vector<string> splitWithEmptyLine(const string &s, const char *delim) {
vector<string> ret;
int last = 0;
int index = s.find(delim, last);
while (index != string::npos) {
ret.push_back(s.substr(last, index - last));
last = index + strlen(delim);
index = s.find(delim, last);
}
if (s.size() - last > 0) {
ret.push_back(s.substr(last));
}
return ret;
}
map<string, mINI> splitTopStr(const string &cmd_str) {
map<string, mINI> ret;
auto lines = splitWithEmptyLine(cmd_str, "\n");
int i = 0;
for (auto &line : lines) {
if(i++ < 1 && line.empty()){
continue;
}
if (line.empty()) {
break;
}
auto line_vec = split(line, ":");
if (line_vec.size() < 2) {
continue;
}
trim(line_vec[0], " \r\n\t");
auto args_vec = split(line_vec[1], ",");
for (auto &arg : args_vec) {
auto arg_vec = split(trim(arg, " \r\n\t."), " ");
if (arg_vec.size() < 2) {
continue;
}
ret[line_vec[0]].emplace(arg_vec[1], arg_vec[0]);
}
}
return ret;
}
bool System::getSystemUsage(SystemUsage &usage) {
try {
#if defined(__linux) || defined(__linux__) || defined(TEST_LINUX)
string cmd_str;
#if !defined(TEST_LINUX)
cmd_str = System::execute("top -b -n 1");
#else
cmd_str = "top - 07:21:31 up 5:48, 2 users, load average: 0.03, 0.62, 0.54\n"
"Tasks: 80 total, 1 running, 78 sleeping, 0 stopped, 1 zombie\n"
"%Cpu(s): 0.8 us, 0.4 sy, 0.0 ni, 98.8 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st\n"
"KiB Mem: 2058500 total, 249100 used, 1809400 free, 19816 buffers\n"
"KiB Swap: 1046524 total, 0 used, 1046524 free. 153012 cached Mem\n"
"\n";
#endif
if (cmd_str.empty()) {
WarnL << "System::execute(\"top -b -n 1\") return empty";
return false;
}
auto topMap = splitTopStr(cmd_str);
usage.task_total = topMap["Tasks"]["total"];
usage.task_running = topMap["Tasks"]["running"];
usage.task_sleeping = topMap["Tasks"]["sleeping"];
usage.task_stopped = topMap["Tasks"]["stopped"];
usage.cpu_user = topMap["%Cpu(s)"]["us"];
usage.cpu_sys = topMap["%Cpu(s)"]["sy"];
usage.cpu_idle = topMap["%Cpu(s)"]["id"];
usage.mem_total = topMap["KiB Mem"]["total"];
usage.mem_free = topMap["KiB Mem"]["free"];
usage.mem_used = topMap["KiB Mem"]["used"];
return true;
#elif defined(__MACH__) || defined(__APPLE__)
/*
"Processes: 275 total, 2 running, 1 stuck, 272 sleeping, 1258 threads \n"
"2018/09/12 10:41:32\n"
"Load Avg: 2.06, 2.88, 2.86 \n"
"CPU usage: 14.54% user, 25.45% sys, 60.0% idle \n"
"SharedLibs: 117M resident, 37M data, 15M linkedit.\n"
"MemRegions: 46648 total, 3654M resident, 62M private, 714M shared.\n"
"PhysMem: 7809M used (1906M wired), 381M unused.\n"
"VM: 751G vsize, 614M framework vsize, 0(0) swapins, 0(0) swapouts.\n"
"Networks: packets: 502366/248M in, 408957/87M out.\n"
"Disks: 349435/6037M read, 78622/2577M written.";
*/
string cmd_str = System::execute("top -l 1");
if(cmd_str.empty()){
WarnL << "System::execute(\"top -n 1\") return empty";
return false;
}
auto topMap = splitTopStr(cmd_str);
usage.task_total = topMap["Processes"]["total"];
usage.task_running = topMap["Processes"]["running"];
usage.task_sleeping = topMap["Processes"]["sleeping"];
usage.task_stopped = topMap["Processes"]["stuck"];
usage.cpu_user = topMap["CPU usage"]["user"];
usage.cpu_sys = topMap["CPU usage"]["sys"];
usage.cpu_idle = topMap["CPU usage"]["idle"];
usage.mem_free = topMap["PhysMem"]["unused"].as<uint32_t>() * 1024 * 1024;
usage.mem_used = topMap["PhysMem"]["used"].as<uint32_t>() * 1024 * 1024;
usage.mem_total = usage.mem_free + usage.mem_used;
return true;
#else
WarnL << "System not supported";
return false;
#endif
} catch (std::exception &ex) {
WarnL << ex.what();
return false;
}
}
bool System::getNetworkUsage(vector<NetworkUsage> &usage) {
try {
#if defined(__linux) || defined(__linux__) || defined(TEST_LINUX)
string cmd_str;
#if !defined(TEST_LINUX)
cmd_str = System::execute("cat /proc/net/dev");
#else
cmd_str =
"Inter-| Receive | Transmit\n"
" face |bytes packets errs drop fifo frame compressed multicast|bytes packets errs drop fifo colls carrier compressed\n"
" lo: 475978 7546 0 0 0 0 0 0 475978 7546 0 0 0 0 0 0\n"
"enp3s0: 151747818 315136 0 0 0 0 0 145 1590783447 1124616 0 0 0 0 0 0";
#endif
if (cmd_str.empty()) {
return false;
}
auto lines = split(cmd_str, "\n");
int i = 0;
vector<string> column_name_vec;
vector<string> category_prefix_vec;
for (auto &line : lines) {
switch (i++) {
case 0: {
category_prefix_vec = split(line, "|");
}
break;
case 1: {
auto category_suffix_vec = split(line, "|");
int j = 0;
for (auto &category_suffix : category_suffix_vec) {
auto column_suffix_vec = split(category_suffix, " ");
for (auto &column_suffix : column_suffix_vec) {
column_name_vec.emplace_back(trim(category_prefix_vec[j]) + "-" + trim(column_suffix));
}
j++;
}
}
break;
default: {
mINI valMap;
auto vals = split(line, " ");
int j = 0;
for (auto &val : vals) {
valMap[column_name_vec[j++]] = trim(val, " \r\n\t:");
}
usage.emplace_back(NetworkUsage());
auto &ifrUsage = usage.back();
ifrUsage.interface = valMap["Inter--face"];
ifrUsage.recv_bytes = valMap["Receive-bytes"];
ifrUsage.recv_packets = valMap["Receive-packets"];
ifrUsage.snd_bytes = valMap["Transmit-bytes"];
ifrUsage.snd_packets = valMap["Transmit-packets"];
}
break;
}
}
return true;
#else
WarnL << "System not supported";
return false;
#endif
} catch (std::exception &ex) {
WarnL << ex.what();
return false;
}
}
bool System::getTcpUsage(System::TcpUsage &usage) {
usage.established = atoi(trim(System::execute("netstat -na|grep ESTABLISHED|wc -l")).data());
usage.syn_recv = atoi(trim(System::execute("netstat -na|grep SYN_RECV|wc -l")).data());
usage.time_wait = atoi(trim(System::execute("netstat -na|grep TIME_WAIT|wc -l")).data());
usage.close_wait = atoi(trim(System::execute("netstat -na|grep CLOSE_WAIT|wc -l")).data());
return true;
}
string System::execute(const string &cmd) {
// DebugL << cmd;
FILE *fPipe = popen(cmd.data(), "r");
if(!fPipe){
return "";
}
string ret;
char buff[1024] = {0};
修复可能内存越界的bug
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while(fgets(buff, sizeof(buff) - 1, fPipe)){
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ret.append(buff);
}
pclose(fPipe);
return ret;
}
static string addr2line(const string &address) {
string cmd = StrPrinter << "addr2line -e " << exePath() << " " << address;
return System::execute(cmd);
}
static void sig_crash(int sig) {
signal(sig, SIG_DFL);
void *array[MAX_STACK_FRAMES];
int size = backtrace(array, MAX_STACK_FRAMES);
char ** strings = backtrace_symbols(array, size);
vector<vector<string> > stack(size);
for (int i = 0; i < size; ++i) {
auto &ref = stack[i];
std::string symbol(strings[i]);
ref.emplace_back(symbol);
#if defined(__linux) || defined(__linux__)
size_t pos1 = symbol.find_first_of("[");
size_t pos2 = symbol.find_last_of("]");
std::string address = symbol.substr(pos1 + 1, pos2 - pos1 - 1);
ref.emplace_back(addr2line(address));
#endif//__linux
}
free(strings);
NoticeCenter::Instance().emitEvent(kBroadcastOnCrashDump,sig,stack);
}
void System::startDaemon() {
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static pid_t pid;
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do{
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pid = fork();
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if(pid == -1){
WarnL << "fork失败:" << get_uv_errmsg();
//休眠1秒再试
sleep(1);
continue;
}
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if(pid == 0){
//子进程
return;
}
//父进程,监视子进程是否退出
DebugL << "启动子进程:" << pid;
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signal(SIGINT, [](int) {
WarnL << "收到主动退出信号,关闭父进程与子进程";
kill(pid,SIGINT);
exit(0);
});
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do{
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int status = 0;
if(waitpid(pid, &status, 0) >= 0) {
WarnL << "子进程退出";
//休眠1秒再启动子进程
sleep(1);
break;
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}
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DebugL << "waitpid被中断:" << get_uv_errmsg();
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}while (true);
}while (true);
}
static string currentDateTime(){
time_t ts = time(NULL);
std::tm tm_snapshot;
localtime_r(&ts, &tm_snapshot);
char buffer[1024] = {0};
std::strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", &tm_snapshot);
return buffer;
}
void System::systemSetup(){
struct rlimit rlim,rlim_new;
if (getrlimit(RLIMIT_CORE, &rlim)==0) {
rlim_new.rlim_cur = rlim_new.rlim_max = RLIM_INFINITY;
if (setrlimit(RLIMIT_CORE, &rlim_new)!=0) {
rlim_new.rlim_cur = rlim_new.rlim_max = rlim.rlim_max;
setrlimit(RLIMIT_CORE, &rlim_new);
}
InfoL << "core文件大小设置为:" << rlim_new.rlim_cur;
}
if (getrlimit(RLIMIT_NOFILE, &rlim)==0) {
rlim_new.rlim_cur = rlim_new.rlim_max = RLIM_INFINITY;
if (setrlimit(RLIMIT_NOFILE, &rlim_new)!=0) {
rlim_new.rlim_cur = rlim_new.rlim_max = rlim.rlim_max;
setrlimit(RLIMIT_NOFILE, &rlim_new);
}
InfoL << "文件最大描述符个数设置为:" << rlim_new.rlim_cur;
}
signal(SIGSEGV, sig_crash);
signal(SIGABRT, sig_crash);
NoticeCenter::Instance().addListener(nullptr,kBroadcastOnCrashDump,[](BroadcastOnCrashDumpArgs){
stringstream ss;
ss << "## crash date:" << currentDateTime() << endl;
ss << "## exe: " << exeName() << endl;
ss << "## signal: " << sig << endl;
ss << "## stack: " << endl;
for (int i = 0; i < stack.size(); ++i) {
ss << "[" << i << "]: ";
for (auto &str : stack[i]){
ss << str << endl;
}
}
string stack_info = ss.str();
ofstream out(StrPrinter << exeDir() << "/crash." << getpid(), ios::out | ios::binary | ios::trunc);
out << stack_info;
out.flush();
cerr << stack_info << endl;
});
}
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