class SignalException - Documentation for Ruby 4.0
Description: class SignalException: Raised when a signal is received. begin Process.
Keywords: ruby,class,SignalException

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# class SignalException

Raised when a signal is received.

    begin
      Process.kill('HUP',Process.pid)
      sleep # wait for receiver to handle signal sent by Process.kill
    rescue SignalException => e
      puts "received Exception #{e}"
    end

produces:

    received Exception SIGHUP

### Public Class Methods

new(sig_name) → signal_exception
new(sig_number [, name]) → signal_exception
Source

    static VALUE
    esignal_init(int argc, VALUE *argv, VALUE self)
    {
        int argnum = 1;
        VALUE sig = Qnil;
        int signo;

        if (argc > 0) {
            sig = rb_check_to_integer(argv[0], "to_int");
            if (!NIL_P(sig)) argnum = 2;
            else sig = argv[0];
        }
        rb_check_arity(argc, 1, argnum);
        if (argnum == 2) {
            signo = NUM2INT(sig);
            if (signo < 0 || signo > NSIG) {
                rb_raise(rb_eArgError, "invalid signal number (%d)", signo);
            }
            if (argc > 1) {
                sig = argv[1];
            }
            else {
                sig = rb_signo2signm(signo);
            }
        }
        else {
            int prefix;
            signo = signm2signo(&sig, FALSE, FALSE, &prefix);
            if (prefix != signame_prefix_len) {
                sig = rb_str_append(rb_str_new_cstr("SIG"), sig);
            }
        }
        rb_call_super(1, &sig);
        rb_ivar_set(self, id_signo, INT2NUM(signo));

        return self;
    }

Construct a new `SignalException` object. `sig_name` should be a known signal name.

### Public Instance Methods

signo → num
Source

    static VALUE
    esignal_signo(VALUE self)
    {
        return rb_ivar_get(self, id_signo);
    }

Returns a signal number.