size(p1)
public
Returns the size of file_name.
file_name can be an IO object.
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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);
}