size(p1)
Returns the size of file_name.
file_name can be an IO object.
static VALUE rb_file_s_size(VALUE klass, VALUE fname) { struct stat st; if (rb_stat(fname, &st) < 0) { int e = errno; FilePathValue(fname); rb_syserr_fail_path(e, fname); } return OFFT2NUM(st.st_size); }