Exception: SignalException

Inherits:
Exception show all
Defined in:
error.c,
error.c

Overview

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

Direct Known Subclasses

Interrupt

Instance Method Summary collapse

Methods inherited from Exception

#==, #backtrace, #backtrace_locations, #cause, #exception, exception, #inspect, #message, #set_backtrace, #to_s

Constructor Details

#new(sig_name) ⇒ Object #new(sig_number[, name]) ⇒ Object

Construct a new SignalException object. sig_name should be a known

signal name.



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# File 'signal.c', line 287

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

    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 len = sizeof(signame_prefix);
  if (SYMBOL_P(sig)) sig = rb_sym2str(sig); else StringValue(sig);
  signm = RSTRING_PTR(sig);
  if (strncmp(signm, signame_prefix, len) == 0) {
      signm += len;
      len = 0;
  }
  signo = signm2signo(signm);
  if (!signo) {
      rb_raise(rb_eArgError, "unsupported name `%.*s%"PRIsVALUE"'",
         len, signame_prefix, sig);
  }
  sig = rb_sprintf("SIG%s", signm);
    }
    rb_call_super(1, &sig);
    rb_ivar_set(self, id_signo, INT2NUM(signo));

    return self;
}

Instance Method Details

#signo ⇒ Numeric

Returns a signal number.

Returns:



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# File 'signal.c', line 341

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