Funzione Trap passando argomenti?

Question

Ho cercato ovunque e sono venuto a credere che non ci sia modo di farlo in altro modo che avere variabili globali, ma credo che il Guru sia in Stackoverflow.com potrebbe essere in grado di aiutarmi:

C'è qualche modo in bash per intrappolare una funzione passando gli argomenti?
Ad esempio, trap <function_name> <arg_1> <arg_2> SIGINT?

Answer 1

trap lets you specify an arbitrary command (or sequence of commands), but you have to pass that command as a single argument. For example, this:

trap 'foo bar baz | bip && fred barney ; wilma' SIGINT

will run this:

foo bar baz | bip && fred barney ; wilma

whenever the shell receives SIGINT. In your case, it sounds like you want:

trap '<function> <arg_1> <arg_2>' SIGINT

Answer 2

Maybe I'm misunderstanding you, but ... this is legal:

trap "cp /etc/passwd $HOME/p" SIGINT
trap 'cp /etc/passwd /tmp/p; echo wooo hoo' SIGINT

Answer 3

I'm not sure I understand correctly what you mean, but if you want to make a signal handler call a function and pass it parameters, trap "function arg1 arg2" SIGNAL should work. For example trap "ls -lh /" INT will cause Ctrl+C in your shell to result in ls -lh / (program with 2 args) being called.