In Files

  • error.c

Parent

StandardError

Methods

SystemCallError

Public Class Methods

system_call_error === other => true or false click to toggle source

Return true if the receiver is a generic SystemCallError, or if the error numbers self and other are the same.

 
               static VALUE
syserr_eqq(VALUE self, VALUE exc)
{
    VALUE num, e;
    ID en;

    CONST_ID(en, "errno");

    if (!rb_obj_is_kind_of(exc, rb_eSystemCallError)) {
        if (!rb_respond_to(exc, en)) return Qfalse;
    }
    else if (self == rb_eSystemCallError) return Qtrue;

    num = rb_attr_get(exc, rb_intern("errno"));
    if (NIL_P(num)) {
        num = rb_funcall(exc, en, 0, 0);
    }
    e = rb_const_get(self, rb_intern("Errno"));
    if (FIXNUM_P(num) ? num == e : rb_equal(num, e))
        return Qtrue;
    return Qfalse;
}
new(msg, errno) => system_call_error_subclass click to toggle source

If errno corresponds to a known system error code, constructs the appropriate Errno class for that error, otherwise constructs a generic SystemCallError object. The error number is subsequently available via the errno method.

 
               static VALUE
syserr_initialize(int argc, VALUE *argv, VALUE self)
{
#if !defined(_WIN32)
    char *strerror();
#endif
    const char *err;
    VALUE mesg, error;
    VALUE klass = rb_obj_class(self);

    if (klass == rb_eSystemCallError) {
        rb_scan_args(argc, argv, "11", &mesg, &error);
        if (argc == 1 && FIXNUM_P(mesg)) {
            error = mesg; mesg = Qnil;
        }
        if (!NIL_P(error) && st_lookup(syserr_tbl, NUM2LONG(error), &klass)) {
            /* change class */
            if (TYPE(self) != T_OBJECT) { /* insurance to avoid type crash */
                rb_raise(rb_eTypeError, "invalid instance type");
            }
            RBASIC(self)->klass = klass;
        }
    }
    else {
        rb_scan_args(argc, argv, "01", &mesg);
        error = rb_const_get(klass, rb_intern("Errno"));
    }
    if (!NIL_P(error)) err = strerror(NUM2INT(error));
    else err = "unknown error";
    if (!NIL_P(mesg)) {
        VALUE str = mesg;

        StringValue(str);
        mesg = rb_sprintf("%s - %.*s", err,
                          (int)RSTRING_LEN(str), RSTRING_PTR(str));
    }
    else {
        mesg = rb_str_new2(err);
    }
    rb_call_super(1, &mesg);
    rb_iv_set(self, "errno", error);
    return self;
}

Public Instance Methods

errno => fixnum click to toggle source

Return this SystemCallError's error number.

 
               static VALUE
syserr_errno(VALUE self)
{
    return rb_attr_get(self, rb_intern("errno"));
}