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tty: remove NODE_TTY_UNSAFE_ASYNC

Nothing but trouble can ever come from it.

PR-URL: #12057
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
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Fishrock123 authored and addaleax committed Dec 21, 2016
1 parent 7e0c3ab commit 1b63fa10960d99078de9a3618ee76dcd5013f6d0
Showing with 1 addition and 18 deletions.
  1. +0 −10 doc/api/cli.md
  2. +0 −7 doc/node.1
  3. +1 −1 lib/tty.js
@@ -393,16 +393,6 @@ Path to the file used to store the persistent REPL history. The default path is
to an empty string (`""` or `" "`) disables persistent REPL history.


### `NODE_TTY_UNSAFE_ASYNC=1`
<!-- YAML
added: v6.4.0
-->

When set to `1`, writes to `stdout` and `stderr` will be non-blocking and
asynchronous when outputting to a TTY on platforms which support async stdio.
Setting this will void any guarantee that stdio will not be interleaved or
dropped at program exit. **Use of this mode is not recommended.**

### `NODE_EXTRA_CA_CERTS=file`
<!-- YAML
added: v7.3.0
@@ -260,13 +260,6 @@ Path to the file used to store the persistent REPL history. The default path
is \fB~/.node_repl_history\fR, which is overridden by this variable. Setting the
value to an empty string ("" or " ") disables persistent REPL history.

.TP
.BR NODE_TTY_UNSAFE_ASYNC =\fI1\fR
When set to \fI1\fR, writes to stdout and stderr will be non-blocking and
asynchronous when outputting to a TTY on platforms which support async stdio.
Setting this will void any guarantee that stdio will not be interleaved or
dropped at program exit. \fBAvoid use.\fR

.TP
.BR OPENSSL_CONF = \fIfile\fR
Load an OpenSSL configuration file on startup. Among other uses, this can be
@@ -74,7 +74,7 @@ function WriteStream(fd) {
// this behaviour has become expected due historical functionality on OS X,
// even though it was originally intended to change in v1.0.2 (Libuv 1.2.1).
// Ref: https://github.com/nodejs/node/pull/1771#issuecomment-119351671
this._handle.setBlocking(process.env.NODE_TTY_UNSAFE_ASYNC !== '1');
this._handle.setBlocking(true);

var winSize = new Array(2);
var err = this._handle.getWindowSize(winSize);

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