truncate(p1, p2)
public
Truncates the file file_name to be at most integer bytes
long. Not available on all platforms.
f = File.new("out", "w")
f.write("1234567890")
f.close
File.truncate("out", 5)
File.size("out")
static VALUE
rb_file_s_truncate(VALUE klass, VALUE path, VALUE len)
{
struct truncate_arg ta;
int r;
ta.pos = NUM2POS(len);
FilePathValue(path);
path = rb_str_encode_ospath(path);
ta.path = StringValueCStr(path);
r = (int)(VALUE)rb_thread_call_without_gvl(nogvl_truncate, &ta,
RUBY_UBF_IO, NULL);
if (r < 0)
rb_sys_fail_path(path);
return INT2FIX(0);
#undef NUM2POS
}