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Exception: SignalException

Relationships & Source Files
Extension / Inclusion / Inheritance Descendants
Subclasses:
Interrupt
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
self, ::Exception
Instance Chain:
self, ::Exception
Inherits: Exception
Defined in: error.c,
error.c,
signal.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

Class Attribute Summary

::Exception - Inherited

.to_tty?

Returns true if exception messages will be sent to a terminal device.

Class Method Summary

::Exception - Inherited

.exception

Returns an exception object of the same class as self; useful for creating a similar exception, but with a different message.
.new

Returns a new exception object.

Instance Method Summary

::Exception - Inherited

#==

Returns whether object is the same class as self and its #message and #backtrace are equal to those of self.
#backtrace

Returns a backtrace value for self; the returned value depends on the form of the stored backtrace value:
#backtrace_locations

Returns a backtrace value for self; the returned value depends on the form of the stored backtrace value:
#cause

Returns the previous value of global variable $!, which may be nil (see Global Variables):
#detailed_message

Returns the message string with enhancements:
#exception

Returns an exception object of the same class as self; useful for creating a similar exception, but with a different message.
#full_message

Returns an enhanced message string:
#inspect

Returns a string representation of self:
#message

Returns #to_s.
#set_backtrace

Sets the backtrace value for self; returns the given +value:
#to_s

Returns a string representation of self:

Constructor Details

.new(sig_name) ⇒ signal_exception .new(sig_number [, name]) ⇒ signal_exception

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

[ GitHub ] 

  


# File 'signal.c', line 343



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;
}


  







Instance Method Details



  

    #signo  ⇒ Numeric   



  

    

Returns a signal number.


  



  [ GitHub ]


  

  


# File 'signal.c', line 388



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