How to handle a SIGTERM
Yes, you can register a shutdown hook with Runtime.addShutdownHook().
exit
How to exit a go program honoring deferred calls?
Just move your program down a level and return your exit code: package main import “fmt” import “os” func doTheStuff() int { defer fmt.Println(“!”) return 3 } func main() { os.Exit(doTheStuff()) }
How do I exit a while loop in Java?
Use break: while (true) { …. if (obj == null) { break; } …. } However, if your code looks exactly like you have specified you can use a normal while loop and change the condition to obj != null: while (obj != null) { …. }
Capture console exit C#
I am not sure where I found the code on the web, but I found it now in one of my old projects. This will allow you to do cleanup code in your console, e.g. when it is abruptly closed or due to a shutdown… [DllImport(“Kernel32”)] private static extern bool SetConsoleCtrlHandler(EventHandler handler, bool add); private … Read more
exit with error message in bash (oneline)
exit doesn’t take more than one argument. To print any message like you want, you can use echo and then exit. [[ $TRESHOLD =~ ^[0-9]+$ ]] || \ { echo “Threshold must be an integer value!”; exit $ERRCODE; }
WPF Command Line
First, find this attribute at the top of your App.xaml file and remove it: StartupUri=”Window1.xaml” That means that the application won’t automatically instantiate your main window and show it. Next, override the OnStartup method in your App class to perform the logic: protected override void OnStartup(StartupEventArgs e) { base.OnStartup(e); if ( /* test command-line params … Read more
How to effectively abort the execution of a Bash script from a function
What you could do, is register the top level shell for the TERM signal to exit, and then send a TERM to the top level shell: #!/bin/bash trap “exit 1” TERM export TOP_PID=$$ function func() { echo “Goodbye” kill -s TERM $TOP_PID } echo “Function call will abort” echo $(func) echo “This will never be … Read more
break/exit script
You could use the stopifnot() function if you want the program to produce an error: foo <- function(x) { stopifnot(x > 500) # rest of program }
Equivalent VB keyword for ‘break’
In both Visual Basic 6.0 and VB.NET you would use: Exit For to break from For loop Wend to break from While loop Exit Do to break from Do loop depending on the loop type. See Exit Statements for more details.
Removing created temp files in unexpected bash exit
I usually create a directory in which to place all my temporary files, and then immediately after, create an EXIT handler to clean up this directory when the script exits. MYTMPDIR=”$(mktemp -d)” trap ‘rm -rf — “$MYTMPDIR”‘ EXIT If you put all your temporary files under $MYTMPDIR, then they will all be deleted when your … Read more