我们看到了360主动防御服务和google更新服务等，让我们来编写一个简单的服务吧。
以下是一个简单的Windows服务示例，使用C语言编写。这个服务会定期监控并记录系统的可用内存，并将结果写入日志文件。
#include <stdio.h>
#include <windows.h>
<p>// 定义睡眠时间，单位为毫秒</p><h1>define SLEEP_TIME 1000</h1><p>// 定义日志文件路径</p><h1>define FILE_PATH "D:\test.txt"</h1><p>// 服务状态
SERVICE_STATUS m_ServiceState;
// 服务状态句柄
SERVICE_STATUS_HANDLE m_ServiceHandle;</p><p>void WINAPI ServiceMain(int argc, char*<em> argv);
void WINAPI ServiceCtrlHandler(DWORD Opcode);
int WriteToLog(char</em> str);</p><p>BOOL bRunning;</p><p>int main() {
SERVICE_TABLE_ENTRY stentry[2];
stentry[0].lpServiceName = "demo";
stentry[0].lpServiceProc = (LPSERVICE_MAIN_FUNCTIONA)ServiceMain;
// 服务的最后一项要设置为NULL
stentry[1].lpServiceName = NULL;
stentry[1].lpServiceProc = NULL;</p><pre class="brush:php;toolbar:false;"><code>StartServiceCtrlDispatcher(stentry);
// system("pause");
return 0;}
// 服务主函数 void WINAPI ServiceMain(int argc, char** argv) { MEMORYSTATUS memstatus; char str[100]; int availMem;
<code>// 服务类型和状态
m_ServiceState.dwServiceType = SERVICE_WIN32;
m_ServiceState.dwCurrentState = SERVICE_START_PENDING;
m_ServiceState.dwControlsAccepted = SERVICE_CONTROL_SHUTDOWN | SERVICE_CONTROL_STOP;
m_ServiceState.dwWin32ExitCode = 0;
m_ServiceState.dwServiceSpecificExitCode = 0;
// 下面这两个基本不需要，除非服务启动时间很长
m_ServiceState.dwCheckPoint = 0;
m_ServiceState.dwWaitHint = 0;
// 注册服务控制函数
m_ServiceHandle = RegisterServiceCtrlHandler("demo", (LPHANDLER_FUNCTION)ServiceCtrlHandler);
if (m_ServiceHandle == NULL) {
WriteToLog("RegisterServiceCtrlHandler failed");
return;
}
WriteToLog("RegisterServiceCtrlHandler success");
// 更新服务状态
m_ServiceState.dwCurrentState = SERVICE_RUNNING;
SetServiceStatus(m_ServiceHandle, &m_ServiceState);
memset(str, '\0', 100);
bRunning = TRUE;
while (bRunning) {
GlobalMemoryStatus(&memstatus);
availMem = memstatus.dwAvailVirtual / 1024 / 1024;
sprintf_s(str, 50, "available memory is %d MB, use %d %%", availMem, memstatus.dwMemoryLoad);
WriteToLog(str);
Sleep(SLEEP_TIME);
}
WriteToLog("service stop!");</code>}
// 服务控制函数(启动，暂停等) void WINAPI ServiceCtrlHandler(DWORD Opcode) { switch (Opcode) { case SERVICE_CONTROL_STOP: bRunning = FALSE; m_ServiceState.dwCurrentState = SERVICE_STOPPED; break; case SERVICE_CONTROL_SHUTDOWN: bRunning = FALSE; m_ServiceState.dwCurrentState = SERVICE_STOPPED; break; default: break; } SetServiceStatus(m_ServiceHandle, &m_ServiceState); }
int WriteToLog(char str) { FILE pFile; fopen_s(&pFile, FILE_PATH, "a+"); fprintf_s(pFile, "%s\n", str); fclose(pFile); return 0; }
编译并生成后，可以使用sc命令来安装服务：
sc create giantbranchDemo binpath= D:\demo.exe
安装后，可以在服务管理界面看到新安装的服务：
您可以从图形界面启动服务，也可以通过sc命令启动、停止和删除服务：
启动、停止和删除服务的命令如下：
sc start sc stop sc delete
如果程序本身自带启动和删除功能，可以使用以下代码：
#include <stdio.h></p><h1>include <windows.h></h1><p>// 定义睡眠时间，单位为毫秒</p><h1>define SLEEP_TIME 1000</h1><p>// 定义日志文件路径</p><h1>define FILE_PATH "C:\test.txt"</h1><h1>define SERVICENAME "practice"</h1><p>// 服务状态
SERVICE_STATUS m_ServiceState;
// 服务状态句柄
SERVICE_STATUS_HANDLE m_ServiceHandle;</p><p>void WINAPI ServiceMain(int argc, char*<em> argv);
void WINAPI ServiceCtrlHandler(DWORD Opcode);
int WriteToLog(char</em> str);
BOOL InstallService();
void DelService();</p><p>BOOL bRunning;</p><p>int main(int argc, char** argv[]) {
SERVICE_TABLE_ENTRY stentry[2];
if (argc == 2) {
if (!strcmp(argv[1], "-i")) {
InstallService();
} else if (!strcmp(argv[1], "-d")) {
DelService();
}
return 0;
}</p><pre class="brush:php;toolbar:false;"><code>stentry[0].lpServiceName = SERVICENAME;
stentry[0].lpServiceProc = (LPSERVICE_MAIN_FUNCTIONA)ServiceMain;
// 服务的最后一项要设置为NULL
stentry[1].lpServiceName = NULL;
stentry[1].lpServiceProc = NULL;
StartServiceCtrlDispatcher(stentry);
return 0;}
// 服务主函数 void WINAPI ServiceMain(int argc, char** argv) { MEMORYSTATUS memstatus; char str[100]; int availMem;
<code>// 服务类型和状态
m_ServiceState.dwServiceType = SERVICE_WIN32;
m_ServiceState.dwCurrentState = SERVICE_START_PENDING;
m_ServiceState.dwControlsAccepted = SERVICE_CONTROL_SHUTDOWN | SERVICE_CONTROL_STOP;
m_ServiceState.dwWin32ExitCode = 0;
m_ServiceState.dwServiceSpecificExitCode = 0;
// 下面这两个基本不需要，除非服务启动时间很长
m_ServiceState.dwCheckPoint = 0;
m_ServiceState.dwWaitHint = 0;
// 注册服务控制函数
m_ServiceHandle = RegisterServiceCtrlHandler(SERVICENAME, (LPHANDLER_FUNCTION)ServiceCtrlHandler);
if (m_ServiceHandle == NULL) {
WriteToLog("RegisterServiceCtrlHandler failed");
return;
}
WriteToLog("RegisterServiceCtrlHandler success");
// 更新服务状态
m_ServiceState.dwCurrentState = SERVICE_RUNNING;
SetServiceStatus(m_ServiceHandle, &m_ServiceState);
memset(str, '\0', 100);
bRunning = TRUE;
GlobalMemoryStatus(&memstatus);
availMem = memstatus.dwAvailVirtual / 1024 / 1024;
sprintf_s(str, 50, "available memory is %d MB, use %d %%", availMem, memstatus.dwMemoryLoad);
WriteToLog(str);
WriteToLog("service is Running!");</code>}
// 服务控制函数(启动，暂停等) void WINAPI ServiceCtrlHandler(DWORD Opcode) { switch (Opcode) { case SERVICE_CONTROL_STOP: case SERVICE_CONTROL_SHUTDOWN: bRunning = FALSE; m_ServiceState.dwWin32ExitCode = 0; m_ServiceState.dwCurrentState = SERVICE_STOPPED; break; default: break; } SetServiceStatus(m_ServiceHandle, &m_ServiceState); }
int WriteToLog(char str) { FILE pFile; fopen_s(&pFile, FILE_PATH, "a+"); fprintf_s(pFile, "%s\n", str); fclose(pFile); return 0; }
BOOL InstallService() { char strDir[1024]; SC_HANDLE scHandler, schService; LPCTSTR lpszBinaryPathName;
<code>// GetCurrentDirectory(1024, strDir);
GetModuleFileName(NULL, strDir, 1024);
printf("%s\n", strDir);
lpszBinaryPathName = strDir;
scHandler = OpenSCManager(NULL, NULL, SC_MANAGER_ALL_ACCESS);
if (scHandler == NULL) {
printf("open scmanager failed! May be you don't have the privilage?");
}
schService = CreateService(
scHandler,
SERVICENAME,
SERVICENAME,
SERVICE_ALL_ACCESS,
SERVICE_WIN32_OWN_PROCESS,
SERVICE_AUTO_START,
SERVICE_ERROR_NORMAL,
lpszBinaryPathName,
NULL,
NULL,
NULL,
NULL,
NULL
);
if (schService == NULL) {
printf("create service failed~");
return FALSE;
}
CloseServiceHandle(schService);
CloseServiceHandle(scHandler);
return TRUE;</code>}
void DelService() { SC_HANDLE scHandler; SC_HANDLE schService; SERVICE_STATUS status; BOOL isSuccess; DWORD errCode;
<code>scHandler = OpenSCManager(NULL, NULL, SC_MANAGER_ALL_ACCESS);
if (scHandler == NULL) {
printf("open scmanager failed! May be you don't have the privilage?");
return;
}
schService = OpenService(scHandler, SERVICENAME, SC_MANAGER_ALL_ACCESS | DELETE);
if (schService == NULL) {
errCode = GetLastError();
printf("OpenService failed! code：%d\n", errCode);
return;
}
isSuccess = QueryServiceStatus(schService, &status);
if (!isSuccess) {
printf("QueryServiceStatus failed!");
return;
}
if (status.dwCurrentState != SERVICE_STOPPED) {
isSuccess = ControlService(schService, SERVICE_CONTROL_STOP, &status);
if (!isSuccess) {
printf("Stop Service failed!");
return;
}
}
isSuccess = DeleteService(schService);
if (!isSuccess) {
printf("DeleteService failed");
return;
} else {
printf("DeleteService success");
}
CloseServiceHandle(scHandler);
CloseServiceHandle(schService);</code>}
这样，您就可以通过命令行参数-i和-d来安装和删除服务了。
以上就是Windows服务编程的详细内容，更多请关注php中文网其它相关文章！
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