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-#### js_sys_module
-#### 一、process introduce
-It is mainly to obtain the relevant ID of the process, obtain and modify the working directory of the process, and exit and close the process. Process module, involving fourteen interfaces.
-
-1.getUid() :number;
-
-The process. Getuid () method returns the digital user ID of the process.
-
-2.getGid() :number;
-
-The process. Getgid () method returns the numeric group ID of the process.
-
-3.getEUid() :number;
-
-The process. Geteuid () method returns the digitally valid user identity of the process.
-
-4.getEGid() :number;
-
-The process. Getegid () method returns the numeric valid group ID of the node. JS process.
-
-5.getGroups() :number[];
-
-The process. Getgroups () method returns an array with supplementary group ID.
-
-6.getPid() :number;
-
-The process.pid property returns the PID of the process.
-
-7.getPpid() :number;
-
-The process.ppid property returns the PID of the parent process of the current process.
-
-8.chdir(dir:string) :void;
-
-The process. Chdir () method changes the current working directory of the node. JS process.
-
-9.uptime() :number;
-
-The process. Uptime () method returns the number of seconds that the current system has been running.
-
-10.Kill(pid:number, signal:number) :boolean;
-
-The process. Kill () method will send a signal to the process PID identified by.
-
-11.abort() :void;
-
-The process. Abort () method causes the node. JS process to exit immediately and generate a core file.
-
-12.on(type:string ,listener:EventListener) :void;
-
-The process. On () method is used to store events triggered by the user.
-
-13.exit(code:number):void;
-
-The process. Exit () method will cause the node. JS process to exit immediately.
-
-14.cwd():string;
-
-The process. Cwd () method returns the current working directory of the node. JS process.
-
-15.off(type:string) :boolean;
-
-The process. off () Clear user-stored function events.
-
-#### process usage method
-import { Process } from '@ohos.process' export default { data: { title: "" },
-
-getGid() {
-    var proc = new Process();
-    var result = proc.getGid;
-    console.log("-------"+result);
-},
-
-getUid() {
-    var proc = new Process();
-    var res =  proc.getUid;
-    console.log("-------"+res);
-},
-
-getEgid() {
-    var proc = new Process();
-    var resb = proc.getEgid;
-    console.log("-------"+resb);
-},
-
-getEuid() {
-    var proc = new Process();
-    var ans = proc.getEuid;
-    console.log("-------"+ans);
-},
-
-getGroups() {
-    var proc = new Process();
-    var answer = proc.getGroups;
-    console.log("-------"+answer);
-},
-
-uptime() {
-    var proc = new Process();
-    var num = proc.uptime();
-    console.log("---------"+num);
-},
-
-kill() {
-    var proc = new Process();
-    var ansu = proc.kill(5,23);
-    console.log("------"+ansu);
-},
-
-chdir() {
-    var proc = new Process();
-    proc.chdir("123456");
-},
-
- getPid() {
-    var pro = new Process();
-    var result = pro.getPid;
-    console.log("-----"+result);
-},
-
-getPpid(){
-    var pro = new Process();
-    var result = pro.getPpid;
-    console.log("---------"+result);
-},
-
-on(){
-    function add(num){
-        var value = num + 5;
-        return value;
-    }
-    var proc = new Process();
-    proc.on("add",add);
-},
-
-off(){
-    var pro = new Process();
-    var result =  pro.off("add");
-    console.log("---------"+result);
-},
-
-Cwd(){
-    var pro = new Process();
-    var result = pro.cwd();
-    console.log("----"+result);
-},
-
-exit(){
-    var pro = new Process();
-    pro.exit(15);
-},
-
-abort(){
-    var pro = new Process();
-    pro.abort();
-},
-
-onInit() {
-    this.title = "strings.world";
-}
-}
-
-#### 二、childprocess introduction
-
-The childprocess object can be used to create a new process. The main process can obtain the standard input and output of the child process, 
-
-send signals and close the child process.
-
-Interface introduction
-
-1.runCmd(command : string, options?: RunOptions): ChildProcess
-
-Runcmd can fork a new process to run a shell and return the childprocess object.
-
-The first parameter command refers to the shell to be run, and the second parameter options refers to some running parameters of the child 
-
-process.These parameters mainly refer to timeout, killsignal and maxbuffer.
-
-If timeout is set, the child process will send a signal killsignal after timeout is exceeded. Maxbuffer is used to limit the maximum stdout and 
-
-stderr sizes that can be received.
-
-2.wait()： Promise
-
-The wait function is used to wait for the child process to run and return the promise object, whose value is the exit code of the child process.
-
-3.getOutput(): Promise
-
-The getoutput function is used to get the standard output of the child process.
-
-4.getErrorOutput(): Promise
-
-The geterroroutput function is used to obtain the standard error output of the child process.
-
-5.close(): void
-
-The close function is used to close the running child process.
-
-6.kill(signo: number): void
-
-The kill function is used to send signals to child processes.
-
-7.readonly killed: boolean
-
-Killed indicates whether the signal is sent successfully.
-
-8.readonly exitCode: number
-
-Exitcode indicates the exit code of the child process.
-
-9.pid和ppid
-
-Represents the child process ID and the main process ID respectively.
-
-#### usage method
-Take the LS command as an example
-
-        var child = childprocess.runCmd("ls", {maxBuffer:9999,killSignal:15} );
-        var stdoutRes = child.getOutput();
-        var stderrRes = child.getErrorOutput();
-        var status = child.wait();
-        stdoutRes.then(val=>{
-            console.log("stdout = :" + val);
-        });
-        stderrRes.then(val=>{
-            console.log("stderr = :" + val);
-        });
-        status.then(val=>{
-            console.log("status = :" + val);
-        });
-