As other people explained, getopts doesn’t parse long options. You can use getopt, but it’s not portable (and it is broken on some platform…) As a workaround, you can implement a shell loop. Here an example that transforms long options to short ones before using the standard getopts command (it’s simpler in my opinion): # … Read more
Once gdb starts, you can run the program using “r args“. So if you are running your code by: $ executablefile arg1 arg2 arg3 Debug it on gdb by: $ gdb executablefile (gdb) r arg1 arg2 arg3
Typically, your help output should include: Description of what the app does Usage syntax, which: Uses [options] to indicate where the options go arg_name for a required, singular arg [arg_name] for an optional, singular arg arg_name… for a required arg of which there can be many (this is rare) [arg_name…] for an arg for which … Read more
If you were doing it from a shell you’d do it like this: % gdb myprogram gdb> run params … < input.txt This seems to work within emacs too.
In Java args contains the supplied command-line arguments as an array of String objects. In other words, if you run your program in your terminal as : C:/ java MyProgram one two then args will contain [“one”, “two”]. If you wanted to output the contents of args, you can just loop through them like this… … Read more
The arguments can never be null. They just wont exist. In other words, what you need to do is check the length of your arguments. public static void main(String[] args) { // Check how many arguments were passed in if (args.length == 0) { System.out.println(“Proper Usage is: java program filename”); System.exit(0); } }
With InnoSetup 5.5.5 (and perhaps other versions), just pass whatever you want as a parameter, prefixed by a / c:\> myAppInstaller.exe /foo=wiggle and in your myApp.iss: [Setup] AppName = {param:foo|waggle} The |waggle provides a default value if no parameter matches. Inno setup is not case sensitive. This is a particularly nice way to handle command … Read more
Unfortunately, the accepted answer to this question is not yet complete… 🙂 Three (major) classes of parameters Assuming, your ImageMagick version is a recent one, here is an important amendment to it: you should differentiate between 3 major classes of command line parameters: Image Settings Image Operators Image Sequence Operators  These three classes do … Read more
As others have pointed out perl blah.pl asdf works, while blah.pl asdf fails. This is because when you run the perl script directly, Windows realizes it must call perl, and uses the rule perl “%1”, which only passes the script name to perl, not any of the parameters. To fix this, you have to tell … Read more
javac is the Java compiler. java is the JVM and what you use to execute a Java program. You do not execute .java files, they are just source files. Presumably there is .jar somewhere (or a directory containing .class files) that is the product of building it in Eclipse: java/src/com/mypackage/Main.java java/classes/com/mypackage/Main.class java/lib/mypackage.jar From directory java … Read more