child-process

In the main process I listen to SIGCHLD: signal(SIGCHLD, &my_handler); Then I fork() , execv() and let it run in background (/bin/cat for example). When I try from terminal to send SIGSTOP to the child process, my_handler() gets called. But when I try to send SIGCONT to it, the the handler isn't called on macOS but it's executed on my Ubuntu. Man: SIGCHLD: child status has changed. Am I missing something? Is it an expected behaviour? I wrote my app on Ubuntu and expected it to work on mac as well. I tried with sigaction() as well, but with the same results. Here's a sample code to demonstrate:

When I package an electron app using electron-packager. The app spawns a child process which uses a 'node' command. Now if I try to launch my app in a system with no node installed on it, does the app work? I have been trying to achieve this and facing various issues, the electron community suggested me to use fork method, spawn method with 'Process.execPath' as command and also setting the ELECTRON_RUN_AS_NODE variable but nothing seems to work on my end. Now after doing all this I question myself, do I definitely need node installed on my system to run the app? or is there really a way that

I use nodejs to captured its child process's stdout data, but always captured the former part of child process's stdout data. When I add fllush(stdout) ，It works OK. But I don't know why, and don't want to add flush(stdout). Here is my code: var tail_child = spawn(exefile, [arg1, arg2, arg3]); tail_child.stdin.write('msg\n'); tail_child.stdout.on('data', function(data) { console.log(data); }); child_process.c printf("data\n"); Need your help! Thank you very much! By default, stdout in general is buffered until a newline is written. However, if stdout is not a tty (which is the case here with

Here's my scenario: process A spawns child process B and spins threads to drain B's outputs. process B spawns daemon process C and drains its outputs, too. process B finishes, daemon process still lives. process A finds out that process B exited via process.waitFor(). However, it's stuck on reading the input streams of process B. It's because B has started a daemon. The input stream receives EOF only when the process C exits. This only happens on Windows. I'm using the ProcessBuilder. Here're the solutions I came up with and I'd like to hear your feedback as none of the solutions I really like

I'm currently making a command line app in C in which many child process is created. So I need to debug this children code. I have created a child process on Xcode as follow. (see the break point and running cursor.) After executing some statements, I get xcode to attach GBN(885) to the xcode debugger as shown in below figure. It doesn't work. How can I attach the child process to xcode debugger? Thank you in advance. inherithandle Google and Apple developer page are really silent on this issue and finally I've found a good workaround. This error message appears when we get Xcode debugger to