Feature #16962
Updated by ioquatix (Samuel Williams) almost 4 years ago
I discussed this with @eregon and I think the goal here is to try and figure out a way these interfaces can be a bit less confusing.
## 1. I don't understand this behaviour:
```ruby
STDOUT.close
STDOUT.puts "Hello World"
# => closed stream
```
vs
```ruby
IO.for_fd(STDOUT.fileno, autoclose: true).close
STDOUT.puts "Hello World"
# => Hello World
```
## 2. `IO.for_fd(..., autoclose: true/false)`
The documentation for `autoclose` is:
> If the value is false, the fd will be kept open after this IO instance gets finalized.
But it also seems to affect `#close` - i.e. calling close does not close underlying file descriptor.
Should we fix the documentation or is the implementation wrong? Maybe the name `autoclose:` is very confusing. My initial interpretation was it was just 'automatically close this I/O when it is garbage collected'.
## 3. `IO.for_fd(..., autoclose: false)` default
In most cases, it seems like `autoclose: false` would make more sense as the default, since the file descriptor must come from some other place.