The nohup command is the poor man’s way of running a process as a daemon. As Bruno Ranschaert noted, when you run a command in an interactive shell, it has a controlling terminal and will receive a SIGHUP (hangup) signal when the controlling process (typically your login shell) exits. The nohup command arranges for input … Read more
Unix has had for a long while a special logging framework called syslog. Type in your shell man 3 syslog and you’ll get the help for the C interface to it. Some examples #include <stdio.h> #include <unistd.h> #include <syslog.h> int main(void) { openlog(“slog”, LOG_PID|LOG_CONS, LOG_USER); syslog(LOG_INFO, “A different kind of Hello world … “); closelog(); … Read more
Block forever. For example, package main import ( “fmt” “time” ) func main() { go forever() select {} // block forever } func forever() { for { fmt.Printf(“%v+\n”, time.Now()) time.Sleep(time.Second) } }
Assuming your daemon has some way of continually running (some event loop, twisted, whatever), you can try to use upstart. Here’s an example upstart config for a hypothetical Python service: description “My service” author “Some Dude <blah@foo.com>” start on runlevel [234] stop on runlevel [0156] chdir /some/dir exec /some/dir/script.py respawn If you save this as … Read more
To ‘background’ a process when you start it Simply add an ampersand (&) after the command. If the program writes to standard out, it will still write to your console / terminal. To foreground the process Simply use the fg command. You can see a list of jobs in the background with jobs. For example: … Read more
Apache Commons Daemon will run your Java program as Linux daemon or WinNT Service.
For normal production (on a server), use the default daemon on; directive so the Nginx server will start in the background. In this way Nginx and other services are running and talking to each other. One server runs many services. For Docker containers (or for debugging), the daemon off; directive tells Nginx to stay in … Read more
Ok, I think I got it. The client is the docker command installed into OS X. The host is the Boot2Docker VM. The daemon is a background service running inside Boot2Docker. This variable tells the client how to connect to the daemon. When starting Boot2Docker, the terminal window that pops up already has DOCKER_HOST set, … Read more
Is this saying that this program won’t ever finish? Yes, that program won’t finish, just try it out. I ask because I have a situation where in my main thread I’m calling sys.exit(), and the process just hangs and my other threads are running as I can see the log. Does this have anything to … Read more
Just unload the plist using launchctl sudo launchctl unload /Library/LaunchDaemons/org.jenkins-ci.plist