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I've been searching everywhere and I've come to believe that there is no way to do that other than having global variables but I believe the guru's in stackoverflow.com may be able to help me:
Is there any way in bash to trap a function by passing arguments to it?
For example, trap <function_name> <arg_1> <arg_2> SIGINT?
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To invoke a function, simply use the function name as a command. To pass parameters to the function, add space separated arguments like other commands. The passed parameters can be accessed inside the function using the standard positional variables i.e. $0, $1, $2, $3 etc.
To pass any number of arguments to the bash function simply put them right after the function's name, separated by a space. It is a good practice to double-quote the arguments to avoid the misparsing of an argument with spaces in it. The passed parameters are $1 , $2 , $3 …
Traps are devices that delimit the displacement of previously free-ranging entities in space through time. Examples of traps used for prey capture by organisms other than humans are spider webs, ant-lion traps, and the Venus fly trap. Traps offer efficiencies to their makers by concentrating the target organisms.
trap defines and activates handlers to run when the shell receives signals or other special conditions. ARG is a command to be read and executed when the shell receives the signal(s) SIGNAL_SPEC.
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
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
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.
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