process

问题 I have this code: private static void Start(String path) { var process = Process.Start(new ProcessStartInfo(path) { WindowStyle = ProcessWindowStyle.Maximized, UseShellExecute = true, }); ThreadPool.QueueUserWorkItem(Tick, process); } private static void Tick(Object obj) { var process = (Process) obj; while (true) { Debug.WriteLine($"HWND: {process.MainWindowHandle}"); Thread.Sleep(TimeSpan.FromMilliseconds(10)); } } This starts a process and then displays the MainWindowHandle property every

问题 In Bash, I would like an if statement which is based of the exit code of running a command. For example: #!/bin/bash if [ ./success.sh ]; then echo "First: success!" else echo "First: failure!" fi if [ ./failure.sh ]; then echo "Second: success!" else echo "Second: failure!" fi success.sh #!/bin/bash exit 0 failure.sh #!/bin/bash exit 1 This should print out: First: success! Second: failure! How would I achieve this? Thanks! 回答1: Just remove the brackets: #!/bin/bash if ./success.sh; then

问题 I have a process that i would like to kill and then restart a service. Someone has written a code to kill the process by writing the following set of scripts ps -ef |grep "process_name" | awk '{print "kill -15 " $2}'> /projects/test/kill.sh #run the kill script /projects/test/kill.sh and then again ps -ef |grep "process_name" | awk '{print "kill -9 " $2}'> /projects/test/kill.sh #run the kill script /projects/test/kill.sh #finally service restart command here # the problem here is that

问题 Im new at process creation etc..so probably a basic question. Im creating a fixed number of child processes, each doing nothing but printing their pid. The problem is in the output that i get. Have a look: int main(){ pid_t pid=0; int i=0,status=0; for(i=0;i<3;i++){ pid=fork(); switch(pid){ case 0:{ //Child printf("\nChild pid: %d",getpid()); exit(0); break; } case -1: {//Error printf("Error occured in fork"); exit(1); break; } default:{ printf("\nParent id: %d",getpid()); printf("\nIts child

问题 I'm running two processes on AIX. Process one is generating several files, process two does backups from all files that are in a backup directory. Process one will copy or move the files into the backup directory. Since process two is always running in the background there is the risk of it starting a backup of a file that is still in the process of being copied or moved and therefore incomplete. How can I avoid this problem? 回答1: Process one should create files in another directory (on the

问题 I'm running two processes on AIX. Process one is generating several files, process two does backups from all files that are in a backup directory. Process one will copy or move the files into the backup directory. Since process two is always running in the background there is the risk of it starting a backup of a file that is still in the process of being copied or moved and therefore incomplete. How can I avoid this problem? 回答1: Process one should create files in another directory (on the

问题 I found some function 'renice' that changes the nice value of process. But I want to know how to change priority in kernel code . Is it okay that just changing the priority value in sched_entity of process? 回答1: If you want to change the niceness of the process programmatically, I would advise against setting these values in the kernel struct directly. Instead, you can utilize several POSIX functions such as setpriority or pthread_setschedparam . The default scheduler policy on Linux is SCHED

问题 I found some function 'renice' that changes the nice value of process. But I want to know how to change priority in kernel code . Is it okay that just changing the priority value in sched_entity of process? 回答1: If you want to change the niceness of the process programmatically, I would advise against setting these values in the kernel struct directly. Instead, you can utilize several POSIX functions such as setpriority or pthread_setschedparam . The default scheduler policy on Linux is SCHED

问题 So basicly the ReadLine() method just hangs right on the last output line. I dont need to end the process. The main goal is to do "cmd-shell" with stdin and stdout (in variables/Printed out). If the same can be achieved with async methods, please, leave it in comments. Thanks in advance. { Process p = new Process() { StartInfo = new ProcessStartInfo("cmd") { UseShellExecute = false, RedirectStandardInput = true, RedirectStandardError = true, RedirectStandardOutput = true, CreateNoWindow =

问题 If I have 4 processes that I want to pipe: process1 | process2 | process3 | process4 do I have to make 3 individual pipes likes this int pipe1[2]; int pipe2[2]; int pipe3[2]; or can I somehow recycle pipe names like in this pseudocode: int pipe1[2]; // we use ONLY two pipe names: pipe1 int pipe2[2]; // and pipe2 pipe(pipe1); // getting 2 file descriptors here pipe(pipe2); // and 2 here for process=1 to 4 if (process==3) // getting 2 new file descriptors for pipe(pipe1); // process3|process4