process

问题 This question already has answers here : SharedPreferences.onSharedPreferenceChangeListener not being called consistently (8 answers) Closed 6 years ago . I have registered registerOnSharedPreferenceChangeListener with my SharedPreferences in my Activity. When I change the data saved with SharedPreferences inside service running in different process, onSharedPreferenceChanged is not called! What should I do to make android call onSharedPreferenceChanged ? 回答1: Most likely, it is being garbage

问题 This question already has answers here : SharedPreferences.onSharedPreferenceChangeListener not being called consistently (8 answers) Closed 6 years ago . I have registered registerOnSharedPreferenceChangeListener with my SharedPreferences in my Activity. When I change the data saved with SharedPreferences inside service running in different process, onSharedPreferenceChanged is not called! What should I do to make android call onSharedPreferenceChanged ? 回答1: Most likely, it is being garbage

问题 I currently have this program which spawns an arbitrary number of child processes and I'm interested in having it implement threads instead of processes. I'm having trouble understanding how to convert from what I have, here is the code which uses processes: #include<stdio.h> #include<stdlib.h> #include<unistd.h> void childprocess(int num); int main(int argc, char **argv) { if (argc != 2) { fprintf(stderr, "Usage: %s num-procs\n", argv[0]); exit(EXIT_FAILURE); } int counter; pid_t pid =

问题 This is my main.cpp which starts the mainwindow: int main(int argc, char *argv[]) { QApplication a(argc, argv); TabWindow w; w.show(); return a.exec(); } Even with the a.connect(...) I do not understand why myApplication.exe still runs after I close the mainwindow. Any suggestions on how I can fully end all processes after the quit button is clicked? EDIT: The Qt Documentation says this: We recommend that you connect clean-up code to the aboutToQuit() signal, instead of putting it in your

问题 I want to run a program in another process, get pid this program and child process should be not depended from parent. Please see following Python code: cmd = 'myPythonProgramm -p param' pid = subprocess.Popen(cmd, shell = True).pid But if I kill parent process then also kill child process. This issue is not exist if I use: os.system('nohup myPythonProgramm -p param &') But in this case I can't get child process pid. How can I run a program in another process, get pid this program and child

问题 I'm trying to create a webapplication for my local network. I've installed IIS 8 on a PC and I'm hosting an ASP.NET C# application on it. Now I would like to launch an exe-file on the server, when the user clicks a button in the asp.net application. I've created a new application pool for the webapplication. Now I'm launching the exe with the following code: Process process = new Process(); process.StartInfo.FileName = @"C:\Windows\notepad.exe"; process.Start(); If I check the task manager, I

问题 The following snippet of code executes a grep command and binds the output to stdout' , stderr' and errCode respectively. main :: IO () main = do let stdin' = "" (errCode, stdout', stderr') <- readProcessWithExitCode "grep" ["search-term" ,"-nr", "/path/to/be/searched"] stdin' putStrLn $ "stdout: " ++ stdout' putStrLn $ "stderr: " ++ stderr' putStrLn $ "errCode: " ++ show errCode The problem is that stdout' only captures the first result of the search. I think this is because grep is

问题 I need to redirect output of a spawned child process. This is what I tried but it doesn't work: Command::new(cmd) .args(&["--testnet", "--fast", format!("&>> {}", log_path).as_str()]) .stdin(Stdio::piped()) .stdout(Stdio::inherit()) .spawn() 回答1: To directly use a file as output without intermediate copying from a pipe, you have to pass the file descriptor. The code is platform-specific, but with conditional compilation you can make it work on Windows too. let f = File::create("foo.log")

问题 I have a program that is running as root. This app calls another program (processA) to run. When processA is running, it is owned by root but I want owner of it to be the current user logged on. How to do it? 回答1: Well it's a little bit tricky... Depends if it's a daemon (service) or you run this command/app. For the 2nd case you can use "su" command. Here's a short example. 1. I create o simple script with following content (it will sleep in background for 100 seconds and will output the

问题 Given a task struct for a process or a thread, what's the idiom of iterating through all other threads belonging to the same process? 回答1: Linux does not distinguish between a process(task) and a thread. The library calls fork() and pthread_create() use the same system call clone(). The difference between fork() and pthread_create() is the bitmask passed to clone(). This bitmask describes which resources (memory, files, filesystems, signal handler,...). See man clone(2) for the details.