mirror of
https://github.com/ZLMediaKit/ZLMediaKit.git
synced 2024-11-02 01:21:33 +08:00
303 lines
9.3 KiB
C++
303 lines
9.3 KiB
C++
/*
|
||
* Copyright (c) 2016 The ZLMediaKit project authors. All Rights Reserved.
|
||
*
|
||
* This file is part of ZLMediaKit(https://github.com/xiongziliang/ZLMediaKit).
|
||
*
|
||
* Use of this source code is governed by MIT license that can be found in the
|
||
* LICENSE file in the root of the source tree. All contributing project authors
|
||
* may be found in the AUTHORS file in the root of the source tree.
|
||
*/
|
||
|
||
#include <limits.h>
|
||
#include <sys/stat.h>
|
||
#ifndef _WIN32
|
||
#include <sys/resource.h>
|
||
#include <unistd.h>
|
||
#else
|
||
//#include <TlHelp32.h>
|
||
#include <windows.h>
|
||
#include <io.h>
|
||
#endif
|
||
|
||
#include <stdexcept>
|
||
#include <signal.h>
|
||
#include "Util/util.h"
|
||
#include "Util/File.h"
|
||
#include "Util/logger.h"
|
||
#include "Util/uv_errno.h"
|
||
#include "Thread/WorkThreadPool.h"
|
||
#include "Process.h"
|
||
using namespace toolkit;
|
||
|
||
void Process::run(const string &cmd, const string &log_file_tmp) {
|
||
kill(2000);
|
||
#ifdef _WIN32
|
||
STARTUPINFO si = {0};
|
||
PROCESS_INFORMATION pi = {0};
|
||
string log_file;
|
||
if (log_file_tmp.empty()) {
|
||
//未指定子进程日志文件时，重定向至/dev/null
|
||
log_file = "NUL";
|
||
} else {
|
||
log_file = StrPrinter << log_file_tmp << "." << getCurrentMillisecond();
|
||
}
|
||
|
||
//重定向shell日志至文件
|
||
auto fp = File::create_file(log_file.data(), "ab");
|
||
if (!fp) {
|
||
fprintf(stderr, "open log file %s failed:%d(%s)\r\n", log_file.data(), get_uv_error(), get_uv_errmsg());
|
||
} else {
|
||
auto log_fd = (HANDLE)(_get_osfhandle(fileno(fp)));
|
||
// dup to stdout and stderr.
|
||
si.wShowWindow = SW_HIDE;
|
||
// STARTF_USESHOWWINDOW:The wShowWindow member contains additional information.
|
||
// STARTF_USESTDHANDLES:The hStdInput, hStdOutput, and hStdError members contain additional information.
|
||
si.dwFlags = STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES;
|
||
si.hStdError = log_fd;
|
||
si.hStdOutput = log_fd;
|
||
}
|
||
|
||
LPTSTR lpDir = const_cast<char*>(cmd.data());
|
||
if (CreateProcess(NULL, lpDir, NULL, NULL, TRUE, 0, NULL, NULL, &si, &pi)){
|
||
//下面两行关闭句柄，解除本进程和新进程的关系，不然有可能 不小心调用TerminateProcess函数关掉子进程
|
||
CloseHandle(pi.hThread);
|
||
_pid = pi.dwProcessId;
|
||
_handle = pi.hProcess;
|
||
fprintf(fp, "\r\n\r\n#### pid=%d,cmd=%s #####\r\n\r\n", _pid, cmd.data());
|
||
InfoL << "start child process " << _pid << ", log file:" << log_file;
|
||
} else {
|
||
WarnL << "start child process fail: " << get_uv_errmsg();
|
||
}
|
||
fclose(fp);
|
||
#else
|
||
_pid = fork();
|
||
if (_pid < 0) {
|
||
throw std::runtime_error(StrPrinter << "fork child process failed,err:" << get_uv_errmsg());
|
||
}
|
||
if (_pid == 0) {
|
||
string log_file;
|
||
if (log_file_tmp.empty()) {
|
||
//未指定子进程日志文件时，重定向至/dev/null
|
||
log_file = "/dev/null";
|
||
} else {
|
||
log_file = StrPrinter << log_file_tmp << "." << getpid();
|
||
}
|
||
//子进程关闭core文件生成
|
||
struct rlimit rlim = {0, 0};
|
||
setrlimit(RLIMIT_CORE, &rlim);
|
||
|
||
//在启动子进程时，暂时禁用SIGINT、SIGTERM信号
|
||
signal(SIGINT, SIG_IGN);
|
||
signal(SIGTERM, SIG_IGN);
|
||
|
||
//重定向shell日志至文件
|
||
auto fp = File::create_file(log_file.data(), "ab");
|
||
if (!fp) {
|
||
fprintf(stderr, "open log file %s failed:%d(%s)\r\n", log_file.data(), get_uv_error(), get_uv_errmsg());
|
||
} else {
|
||
auto log_fd = fileno(fp);
|
||
// dup to stdout and stderr.
|
||
if (dup2(log_fd, STDOUT_FILENO) < 0) {
|
||
fprintf(stderr, "dup2 stdout file %s failed:%d(%s)\r\n", log_file.data(), get_uv_error(), get_uv_errmsg());
|
||
}
|
||
if (dup2(log_fd, STDERR_FILENO) < 0) {
|
||
fprintf(stderr, "dup2 stderr file %s failed:%d(%s)\r\n", log_file.data(), get_uv_error(), get_uv_errmsg());
|
||
}
|
||
// 关闭日志文件
|
||
::fclose(fp);
|
||
}
|
||
fprintf(stderr, "\r\n\r\n#### pid=%d,cmd=%s #####\r\n\r\n", getpid(), cmd.data());
|
||
|
||
//关闭父进程继承的fd
|
||
for (int i = 3; i < 1024; i++) {
|
||
::close(i);
|
||
}
|
||
|
||
auto params = split(cmd, " ");
|
||
// memory leak in child process, it's ok.
|
||
char **charpv_params = new char *[params.size() + 1];
|
||
for (int i = 0; i < (int) params.size(); i++) {
|
||
std::string &p = params[i];
|
||
charpv_params[i] = (char *) p.data();
|
||
}
|
||
// EOF: NULL
|
||
charpv_params[params.size()] = NULL;
|
||
|
||
// TODO: execv or execvp
|
||
auto ret = execv(params[0].c_str(), charpv_params);
|
||
if (ret < 0) {
|
||
fprintf(stderr, "fork process failed:%d(%s)\r\n", get_uv_error(), get_uv_errmsg());
|
||
}
|
||
exit(ret);
|
||
}
|
||
|
||
string log_file;
|
||
if (log_file_tmp.empty()) {
|
||
//未指定子进程日志文件时，重定向至/dev/null
|
||
log_file = "/dev/null";
|
||
} else {
|
||
log_file = StrPrinter << log_file_tmp << "." << _pid;
|
||
}
|
||
InfoL << "start child process " << _pid << ", log file:" << log_file;
|
||
#endif // _WIN32
|
||
}
|
||
|
||
/**
|
||
* 获取进程是否存活状态
|
||
* @param pid 进程号
|
||
* @param exit_code_ptr 进程返回代码
|
||
* @param block 是否阻塞等待
|
||
* @return 进程是否还在运行
|
||
*/
|
||
static bool s_wait(pid_t pid, void *handle, int *exit_code_ptr, bool block) {
|
||
if (pid <= 0) {
|
||
return false;
|
||
}
|
||
#ifdef _WIN32
|
||
DWORD code = 0;
|
||
if (block) {
|
||
//一直等待
|
||
code = WaitForSingleObject(handle, INFINITE);
|
||
} else {
|
||
code = WaitForSingleObject(handle, 0);
|
||
}
|
||
|
||
if(code == WAIT_FAILED || code == WAIT_OBJECT_0){
|
||
//子进程已经退出了,获取子进程退出代码
|
||
DWORD exitCode = 0;
|
||
if(exit_code_ptr && GetExitCodeProcess(handle, &exitCode)){
|
||
*exit_code_ptr = exitCode;
|
||
}
|
||
return false;
|
||
}
|
||
|
||
if(code == WAIT_TIMEOUT){
|
||
//子进程还在线
|
||
return true;
|
||
}
|
||
//不太可能运行到此处
|
||
WarnL << "WaitForSingleObject ret:" << code;
|
||
return false;
|
||
#else
|
||
int status = 0;
|
||
pid_t p = waitpid(pid, &status, block ? 0 : WNOHANG);
|
||
int exit_code = (status & 0xFF00) >> 8;
|
||
if (exit_code_ptr) {
|
||
*exit_code_ptr = exit_code;
|
||
}
|
||
if (p < 0) {
|
||
WarnL << "waitpid failed, pid=" << pid << ", err=" << get_uv_errmsg();
|
||
return false;
|
||
}
|
||
if (p > 0) {
|
||
InfoL << "process terminated, pid=" << pid << ", exit code=" << exit_code;
|
||
return false;
|
||
}
|
||
return true;
|
||
#endif // _WIN32
|
||
}
|
||
|
||
#ifdef _WIN32
|
||
// Inspired from http://stackoverflow.com/a/15281070/1529139
|
||
// and http://stackoverflow.com/q/40059902/1529139
|
||
bool signalCtrl(DWORD dwProcessId, DWORD dwCtrlEvent){
|
||
bool success = false;
|
||
DWORD thisConsoleId = GetCurrentProcessId();
|
||
// Leave current console if it exists
|
||
// (otherwise AttachConsole will return ERROR_ACCESS_DENIED)
|
||
bool consoleDetached = (FreeConsole() != FALSE);
|
||
|
||
if (AttachConsole(dwProcessId) != FALSE){
|
||
// Add a fake Ctrl-C handler for avoid instant kill is this console
|
||
// WARNING: do not revert it or current program will be also killed
|
||
SetConsoleCtrlHandler(nullptr, true);
|
||
success = (GenerateConsoleCtrlEvent(dwCtrlEvent, 0) != FALSE);
|
||
FreeConsole();
|
||
}
|
||
|
||
if (consoleDetached){
|
||
// Create a new console if previous was deleted by OS
|
||
if (AttachConsole(thisConsoleId) == FALSE){
|
||
int errorCode = GetLastError();
|
||
if (errorCode == 31){
|
||
// 31=ERROR_GEN_FAILURE
|
||
AllocConsole();
|
||
}
|
||
}
|
||
}
|
||
return success;
|
||
}
|
||
#endif // _WIN32
|
||
|
||
static void s_kill(pid_t pid, void *handle, int max_delay, bool force) {
|
||
if (pid <= 0) {
|
||
//pid无效
|
||
return;
|
||
}
|
||
#ifdef _WIN32
|
||
//windows下目前没有比较好的手段往子进程发送SIGTERM或信号
|
||
//所以杀死子进程的方式全部强制为立即关闭
|
||
force = true;
|
||
if(force){
|
||
//强制关闭子进程
|
||
TerminateProcess(handle, 0);
|
||
}else{
|
||
//非强制关闭，发送Ctr+C信号
|
||
signalCtrl(pid, CTRL_C_EVENT);
|
||
}
|
||
#else
|
||
if (::kill(pid, force ? SIGKILL : SIGTERM) == -1) {
|
||
//进程可能已经退出了
|
||
WarnL << "kill process " << pid << " failed:" << get_uv_errmsg();
|
||
return;
|
||
}
|
||
#endif // _WIN32
|
||
|
||
if (force) {
|
||
//发送SIGKILL信号后，阻塞等待退出
|
||
s_wait(pid, handle, nullptr, true);
|
||
DebugL << "force kill " << pid << " success!";
|
||
return;
|
||
}
|
||
|
||
//发送SIGTERM信号后，2秒后检查子进程是否已经退出
|
||
WorkThreadPool::Instance().getPoller()->doDelayTask(max_delay, [pid, handle]() {
|
||
if (!s_wait(pid, handle, nullptr, false)) {
|
||
//进程已经退出了
|
||
return 0;
|
||
}
|
||
//进程还在运行
|
||
WarnL << "process still working,force kill it:" << pid;
|
||
s_kill(pid, handle, 0, true);
|
||
return 0;
|
||
});
|
||
}
|
||
|
||
void Process::kill(int max_delay, bool force) {
|
||
if (_pid <= 0) {
|
||
return;
|
||
}
|
||
s_kill(_pid, _handle, max_delay, force);
|
||
_pid = -1;
|
||
#ifdef _WIN32
|
||
if(_handle){
|
||
CloseHandle(_handle);
|
||
_handle = nullptr;
|
||
}
|
||
#endif
|
||
}
|
||
|
||
Process::~Process() {
|
||
kill(2000);
|
||
}
|
||
|
||
Process::Process() {}
|
||
|
||
bool Process::wait(bool block) {
|
||
return s_wait(_pid, _handle, &_exit_code, block);
|
||
}
|
||
|
||
int Process::exit_code() {
|
||
return _exit_code;
|
||
}
|