sigint

问题 In Node.js servers, is there any difference between catching SIGTERM vs catching SIGINT? I thought processes were not supposed to be able to prevent shutdown upon a SIGINT? process.once('SIGINT', function (code) { console.log('SIGINT received...'); server.close(); }); // vs. process.once('SIGTERM', function (code) { console.log('SIGTERM received...'); server.close(); }); Am I able to trap both signals and prevent exit? My experimentation suggests the answer is yes, but from what I have read,

问题 Windows 10 x64 Node v12.19.0 Why wasn't called my handler of SIGTERM event after first opening http://localhost:3000/ in a browser? Application is terminated without executiong my handler (I don't see its console output). // node v12.19.0 const http = require("http"); const server = http.createServer((req,res)=> { res.statusCode = 200; res.end("Hello, World!"); setTimeout(() => { process.kill(process.pid, "SIGTERM"); } , 2000); }); process.on("SIGTERM", () => { // Why it will not be executed?

问题 Windows 10 x64 Node v12.19.0 Why wasn't called my handler of SIGTERM event after first opening http://localhost:3000/ in a browser? Application is terminated without executiong my handler (I don't see its console output). // node v12.19.0 const http = require("http"); const server = http.createServer((req,res)=> { res.statusCode = 200; res.end("Hello, World!"); setTimeout(() => { process.kill(process.pid, "SIGTERM"); } , 2000); }); process.on("SIGTERM", () => { // Why it will not be executed?

来源： https://stackoverflow.com/questions/13057771/sigint-to-cancel-read-in-bash-script

来源： https://stackoverflow.com/questions/63553881/maxlistenersexceededwarning-in-node-js-express-app

问题 I have a program which takes a long time to complete. I would like it to be able to catch SIGINT (ctrl-c) and call the self.save_work() method. As it stands, my signal_hander() does not work since self is not defined by the time the program reaches signal_handler() . How can I set it up so self.save_work gets called after a SIGINT ? #!/usr/bin/env python import signal def signal_handler(signal, frame): self.save_work() # Does not work exit(1) signal.signal(signal.SIGINT, signal_handler) class

问题 Would someone please tell me why below bash statement cannot be terminated by Ctrl+c properly? $( { ( tail -fn0 /tmp/a.txt & )| while read line; do echo $line; done } 3>&1 ) I run this statement, then two bash processes and one tail process are launched(got from ps auxf ), then input Ctrl+c , and it won't quit to the bash prompt, at this moment, I see the two bash processes stopped, while the tail is still running, then I input something into /tmp/a.txt , then we could get into bash prompt.

问题 I'm using Node.js v0.10.31 on Windows 8.1 x64. I noticed that for a process (a node.js or python script) that handles the SIGINT handler, the handler is not called when the signal is sent from another node.js process by process.kill(PID, "SIGINT") , and thus causing it to terminate. However I indeed verified that the handlers are called if the SIGINT is sent by pressing CTRL-C in console. Here's the Node.js script that handles SIGINT (CoffeeScript): process.on 'SIGINT', -> console.log "SIGINT

问题 Does the signal() function overwrite other signal calls a process might have set up? I.e. if a SIGINT handler has been setup by a process, and a DLL calls signal(SIGINT,xxx) to handle its own termination code, does the original SIGINT handler get disabled? 回答1: The signal() call: Installs the handler you specify as a new signal handler, and Tells you what the old handler was. The new handler will be called instead of the old one. If you want to chain them, you need to do something like:

问题 Does the signal() function overwrite other signal calls a process might have set up? I.e. if a SIGINT handler has been setup by a process, and a DLL calls signal(SIGINT,xxx) to handle its own termination code, does the original SIGINT handler get disabled? 回答1: The signal() call: Installs the handler you specify as a new signal handler, and Tells you what the old handler was. The new handler will be called instead of the old one. If you want to chain them, you need to do something like: